maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/libcxx/include/__hash_table

2588 lines
88 KiB
Plaintext
Raw Normal View History

libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
Wiped out some non-ascii characters that snuck into the copyright. llvm-svn: 103516
2010-05-12 05:36:01 +08:00
// The LLVM Compiler Infrastructure
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
//
license change llvm-svn: 119395
2010-11-17 06:09:02 +08:00
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP__HASH_TABLE
#define _LIBCPP__HASH_TABLE
#include <__config>
#include <initializer_list>
#include <memory>
#include <iterator>
#include <algorithm>
#include <cmath>
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
#include <utility>
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Add protection from min/max macros llvm-svn: 145407
2011-11-30 00:45:27 +08:00
#include <__undef_min_max>
Handle function name conflicts in _LIBCPP_MSVCRT mode Visual Studio's SAL extension uses a macro named __deallocate. This macro is used pervasively, and gets included through various different ways. This conflicts with the similarly named interfaces in libc++. Introduce a undef header similar to __undef_min_max to handle this. This fixes a number of errors due to the macro replacing the function name. llvm-svn: 229162
2015-02-14 06:15:32 +08:00
#include <__undef___deallocate>
Add protection from min/max macros llvm-svn: 145407
2011-11-30 00:45:27 +08:00
NFC. Move definition of _LIBCPP_ASSERT into __debug header and remove external include guards. Things done in this patch: 1. Make __debug include __config since it uses macros from it. 2. The current method of defining _LIBCPP_ASSERT is prone to redefinitions. Move the null _LIBCPP_ASSERT definition into the __debug header to prevent this. 3. Remove external <__debug> include gaurds. <__debug> guards almost all of its contents internally. There is no reason to be doing it externally. This patch should not change any functionality. llvm-svn: 215332
2014-08-11 07:53:08 +08:00
#include <__debug>
Ok, 3 major changes for debug mode in one commit: 1. I had been detecting and trapping iterator == and \!= among iterators in different containers as an error. But the trapping itself is actually an error. Consider: #include <iostream> #include <vector> #include <algorithm> template <class C> void display(const C& c) { std::cout << "{"; bool first = true; for (const auto& x : c) { if (\!first) std::cout << ", "; first = false; std::cout << x; } std::cout << "}\n"; } int main() { typedef std::vector<int> V; V v1 = {1, 3, 5}; V v2 = {2, 4, 6}; display(v1); display(v2); V::iterator i = std::find(v1.begin(), v1.end(), 1); V::iterator j = std::find(v2.begin(), v2.end(), 2); if (*i == *j) i = j; // perfectly legal // ... if (i \!= j) // the only way to check v2.push_back(*i); display(v1); display(v2); } It is legal to assign an iterator from one container to another of the same type. This is required to work. One might want to test whether or not such an assignment had been made. The way one performs such a check is using the iterator's ==, \!= operator. This is a logical and necessary function and does not constitute an error. 2. I had a header circular dependence bug when _LIBCPP_DEBUG2 is defined. This caused a problem in several of the libc++ tests. Fixed. 3. There is a serious problem when _LIBCPP_DEBUG2=1 at the moment in that std::basic_string is inoperable. std::basic_string uses __wrap_iterator to implement its iterators. __wrap_iterator has been rigged up in debug mode to support vector. But string hasn't been rigged up yet. This means that one gets false positives when using std::string in debug mode. I've upped std::string's priority in www/debug_mode.html. llvm-svn: 187636
2013-08-02 08:26:35 +08:00
Windows support by Ruben Van Boxem. llvm-svn: 142235
2011-10-18 04:05:10 +08:00
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
#pragma GCC system_header
Windows support by Ruben Van Boxem. llvm-svn: 142235
2011-10-18 04:05:10 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
_LIBCPP_BEGIN_NAMESPACE_STD
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
template <class _Key, class _Tp>
union __hash_value_type;
#else
template <class _Key, class _Tp>
struct __hash_value_type;
#endif
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp>
struct __is_hash_value_type_imp : false_type {};
template <class _Key, class _Value>
struct __is_hash_value_type_imp<__hash_value_type<_Key, _Value>> : true_type {};
template <class ..._Args>
struct __is_hash_value_type : false_type {};
template <class _One>
struct __is_hash_value_type<_One> : __is_hash_value_type_imp<typename __uncvref<_One>::type> {};
#endif
No functionality change at this time. I've split _LIBCPP_VISIBLE up into two flags: _LIBCPP_TYPE_VIS and _LIBCPP_FUNC_VIS. This is in preparation for taking advantage of clang's new __type_visibility__ attribute. llvm-svn: 176593
2013-03-07 07:30:19 +08:00
_LIBCPP_FUNC_VIS
Provide names for template and function parameters in forward declarations. The purpose is to aid automated documentation tools. llvm-svn: 133008
2011-06-15 03:58:17 +08:00
size_t __next_prime(size_t __n);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _NodePtr>
struct __hash_node_base
{
typedef __hash_node_base __first_node;
Fixed two problems found by Chris Jefferson: Made operator>> for char consistent with gcc. Opened an LWG issue on this one. 2) Renamed some private typedefs which are causing boost grief. llvm-svn: 126576
2011-02-28 02:02:02 +08:00
_NodePtr __next_;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY __hash_node_base() _NOEXCEPT : __next_(nullptr) {}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
};
template <class _Tp, class _VoidPtr>
struct __hash_node
: public __hash_node_base
<
Use __rebind_pointer to avoid #ifdef block llvm-svn: 256654
2015-12-31 05:52:00 +08:00
typename __rebind_pointer<_VoidPtr, __hash_node<_Tp, _VoidPtr> >::type
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
>
{
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef _Tp __node_value_type;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_t __hash_;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
__node_value_type __value_;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
};
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
inline _LIBCPP_INLINE_VISIBILITY
bool
Rename pow2 functions in __hash_table to reflect that they are hash specific llvm-svn: 227866
2015-02-03 05:31:48 +08:00
__is_hash_power2(size_t __bc)
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
{
return __bc > 2 && !(__bc & (__bc - 1));
}
inline _LIBCPP_INLINE_VISIBILITY
size_t
__constrain_hash(size_t __h, size_t __bc)
{
return !(__bc & (__bc - 1)) ? __h & (__bc - 1) : __h % __bc;
}
inline _LIBCPP_INLINE_VISIBILITY
size_t
Rename pow2 functions in __hash_table to reflect that they are hash specific llvm-svn: 227866
2015-02-03 05:31:48 +08:00
__next_hash_pow2(size_t __n)
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
{
return size_t(1) << (std::numeric_limits<size_t>::digits - __clz(__n-1));
}
Provide names for template and function parameters in forward declarations. The purpose is to aid automated documentation tools. llvm-svn: 133008
2011-06-15 03:58:17 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc> class __hash_table;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
template <class _NodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_iterator;
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
template <class _ConstNodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_const_iterator;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
template <class _NodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_local_iterator;
template <class _ConstNodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_const_local_iterator;
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
template <class _HashIterator> class _LIBCPP_TYPE_VIS_ONLY __hash_map_iterator;
template <class _HashIterator> class _LIBCPP_TYPE_VIS_ONLY __hash_map_const_iterator;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
template <class _Tp>
struct __key_value_types {
static_assert(!is_reference<_Tp>::value && !is_const<_Tp>::value, "");
typedef _Tp key_type;
typedef _Tp __node_value_type;
typedef _Tp __container_value_type;
static const bool __is_map = false;
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
_LIBCPP_INLINE_VISIBILITY
static key_type const& __get_key(_Tp const& __v) {
return __v;
}
_LIBCPP_INLINE_VISIBILITY
static __container_value_type const& __get_value(__node_value_type const& __v) {
return __v;
}
_LIBCPP_INLINE_VISIBILITY
static __container_value_type* __get_ptr(__node_value_type& __n) {
return _VSTD::addressof(__n);
}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
static __container_value_type&& __move(__node_value_type& __v) {
return _VSTD::move(__v);
}
#endif
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
};
template <class _Key, class _Tp>
struct __key_value_types<__hash_value_type<_Key, _Tp> > {
typedef _Key key_type;
typedef _Tp mapped_type;
typedef __hash_value_type<_Key, _Tp> __node_value_type;
typedef pair<const _Key, _Tp> __container_value_type;
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
typedef pair<_Key, _Tp> __nc_value_type;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef __container_value_type __map_value_type;
static const bool __is_map = true;
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
_LIBCPP_INLINE_VISIBILITY
static key_type const& __get_key(__container_value_type const& __v) {
return __v.first;
}
template <class _Up>
_LIBCPP_INLINE_VISIBILITY
static typename enable_if<__is_same_uncvref<_Up, __node_value_type>::value,
__container_value_type const&>::type
__get_value(_Up& __t) {
return __t.__cc;
}
template <class _Up>
_LIBCPP_INLINE_VISIBILITY
static typename enable_if<__is_same_uncvref<_Up, __container_value_type>::value,
__container_value_type const&>::type
__get_value(_Up& __t) {
return __t;
}
_LIBCPP_INLINE_VISIBILITY
static __container_value_type* __get_ptr(__node_value_type& __n) {
return _VSTD::addressof(__n.__cc);
}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
static __nc_value_type&& __move(__node_value_type& __v) {
return _VSTD::move(__v.__nc);
}
#endif
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
};
template <class _Tp, class _AllocPtr, class _KVTypes = __key_value_types<_Tp>,
bool = _KVTypes::__is_map>
struct __map_pointer_types {};
template <class _Tp, class _AllocPtr, class _KVTypes>
struct __map_pointer_types<_Tp, _AllocPtr, _KVTypes, true> {
typedef typename _KVTypes::__map_value_type _Mv;
typedef typename __rebind_pointer<_AllocPtr, _Mv>::type
__map_value_type_pointer;
typedef typename __rebind_pointer<_AllocPtr, const _Mv>::type
__const_map_value_type_pointer;
};
template <class _NodePtr, class _NodeT = typename pointer_traits<_NodePtr>::element_type>
struct __hash_node_types;
template <class _NodePtr, class _Tp, class _VoidPtr>
struct __hash_node_types<_NodePtr, __hash_node<_Tp, _VoidPtr> >
: public __key_value_types<_Tp>, __map_pointer_types<_Tp, _VoidPtr>
{
typedef __key_value_types<_Tp> __base;
public:
typedef ptrdiff_t difference_type;
typedef size_t size_type;
typedef typename __rebind_pointer<_NodePtr, void>::type __void_pointer;
typedef typename pointer_traits<_NodePtr>::element_type __node_type;
typedef _NodePtr __node_pointer;
typedef __hash_node_base<__node_pointer> __node_base_type;
typedef typename __rebind_pointer<_NodePtr, __node_base_type>::type
__node_base_pointer;
typedef _Tp __node_value_type;
typedef typename __rebind_pointer<_VoidPtr, __node_value_type>::type
__node_value_type_pointer;
typedef typename __rebind_pointer<_VoidPtr, const __node_value_type>::type
__const_node_value_type_pointer;
private:
static_assert(!is_const<__node_type>::value,
"_NodePtr should never be a pointer to const");
static_assert((is_same<typename pointer_traits<_VoidPtr>::element_type, void>::value),
"_VoidPtr does not point to unqualified void type");
static_assert((is_same<typename __rebind_pointer<_VoidPtr, __node_type>::type,
_NodePtr>::value), "_VoidPtr does not rebind to _NodePtr.");
};
template <class _HashIterator>
struct __hash_node_types_from_iterator;
template <class _NodePtr>
struct __hash_node_types_from_iterator<__hash_iterator<_NodePtr> > : __hash_node_types<_NodePtr> {};
template <class _NodePtr>
struct __hash_node_types_from_iterator<__hash_const_iterator<_NodePtr> > : __hash_node_types<_NodePtr> {};
template <class _NodePtr>
struct __hash_node_types_from_iterator<__hash_local_iterator<_NodePtr> > : __hash_node_types<_NodePtr> {};
template <class _NodePtr>
struct __hash_node_types_from_iterator<__hash_const_local_iterator<_NodePtr> > : __hash_node_types<_NodePtr> {};
template <class _NodeValueTp, class _VoidPtr>
struct __make_hash_node_types {
typedef __hash_node<_NodeValueTp, _VoidPtr> _NodeTp;
typedef typename __rebind_pointer<_VoidPtr, _NodeTp>::type _NodePtr;
typedef __hash_node_types<_NodePtr> type;
};
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _NodePtr>
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
class _LIBCPP_TYPE_VIS_ONLY __hash_iterator
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef __hash_node_types<_NodePtr> _NodeTypes;
typedef _NodePtr __node_pointer;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_pointer __node_;
public:
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef forward_iterator_tag iterator_category;
typedef typename _NodeTypes::__node_value_type value_type;
typedef typename _NodeTypes::difference_type difference_type;
typedef value_type& reference;
typedef typename _NodeTypes::__node_value_type_pointer pointer;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
_LIBCPP_INLINE_VISIBILITY __hash_iterator() _NOEXCEPT
N3644 support for <unordered_set> and <unordered_map> llvm-svn: 187915
2013-08-08 05:30:44 +08:00
#if _LIBCPP_STD_VER > 11
: __node_(nullptr)
#endif
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_i(this);
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_iterator(const __hash_iterator& __i)
: __node_(__i.__node_)
{
__get_db()->__iterator_copy(this, &__i);
}
_LIBCPP_INLINE_VISIBILITY
~__hash_iterator()
{
__get_db()->__erase_i(this);
}
_LIBCPP_INLINE_VISIBILITY
__hash_iterator& operator=(const __hash_iterator& __i)
{
if (this != &__i)
{
__get_db()->__iterator_copy(this, &__i);
__node_ = __i.__node_;
}
return *this;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
reference operator*() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container iterator");
#endif
return __node_->__value_;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
pointer operator->() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container iterator");
#endif
return pointer_traits<pointer>::pointer_to(__node_->__value_);
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_iterator& operator++()
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable unordered container iterator");
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_ = __node_->__next_;
return *this;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_iterator operator++(int)
{
__hash_iterator __t(*this);
++(*this);
return __t;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
friend _LIBCPP_INLINE_VISIBILITY
bool operator==(const __hash_iterator& __x, const __hash_iterator& __y)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{
return __x.__node_ == __y.__node_;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
friend _LIBCPP_INLINE_VISIBILITY
bool operator!=(const __hash_iterator& __x, const __hash_iterator& __y)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{return !(__x == __y);}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
private:
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_iterator(__node_pointer __node, const void* __c) _NOEXCEPT
: __node_(__node)
{
__get_db()->__insert_ic(this, __c);
}
#else
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_iterator(__node_pointer __node) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __node_(__node)
{}
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class, class, class, class> friend class __hash_table;
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_const_iterator;
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_map_iterator;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_map;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_multimap;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
};
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
template <class _NodePtr>
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
class _LIBCPP_TYPE_VIS_ONLY __hash_const_iterator
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
static_assert(!is_const<typename pointer_traits<_NodePtr>::element_type>::value, "");
typedef __hash_node_types<_NodePtr> _NodeTypes;
typedef _NodePtr __node_pointer;
Get <ext/hash_map> working again llvm-svn: 261180
2016-02-18 08:20:34 +08:00
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
__node_pointer __node_;
Revert r260012 due to __gnu_cxx::hash_map breakage llvm-svn: 260172
2016-02-09 07:47:13 +08:00
public:
Get <ext/hash_map> working again llvm-svn: 261180
2016-02-18 08:20:34 +08:00
typedef __hash_iterator<_NodePtr> __non_const_iterator;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef forward_iterator_tag iterator_category;
typedef typename _NodeTypes::__node_value_type value_type;
typedef typename _NodeTypes::difference_type difference_type;
typedef const value_type& reference;
typedef typename _NodeTypes::__const_node_value_type_pointer pointer;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
_LIBCPP_INLINE_VISIBILITY __hash_const_iterator() _NOEXCEPT
N3644 support for <unordered_set> and <unordered_map> llvm-svn: 187915
2013-08-08 05:30:44 +08:00
#if _LIBCPP_STD_VER > 11
: __node_(nullptr)
#endif
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_i(this);
#endif
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_const_iterator(const __non_const_iterator& __x) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __node_(__x.__node_)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__iterator_copy(this, &__x);
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator(const __hash_const_iterator& __i)
: __node_(__i.__node_)
{
__get_db()->__iterator_copy(this, &__i);
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
~__hash_const_iterator()
{
__get_db()->__erase_i(this);
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator& operator=(const __hash_const_iterator& __i)
{
if (this != &__i)
{
__get_db()->__iterator_copy(this, &__i);
__node_ = __i.__node_;
}
return *this;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
reference operator*() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container const_iterator");
#endif
return __node_->__value_;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
pointer operator->() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container const_iterator");
#endif
return pointer_traits<pointer>::pointer_to(__node_->__value_);
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_const_iterator& operator++()
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable unordered container const_iterator");
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_ = __node_->__next_;
return *this;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_const_iterator operator++(int)
{
__hash_const_iterator __t(*this);
++(*this);
return __t;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
friend _LIBCPP_INLINE_VISIBILITY
bool operator==(const __hash_const_iterator& __x, const __hash_const_iterator& __y)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{
return __x.__node_ == __y.__node_;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
friend _LIBCPP_INLINE_VISIBILITY
bool operator!=(const __hash_const_iterator& __x, const __hash_const_iterator& __y)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{return !(__x == __y);}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
private:
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator(__node_pointer __node, const void* __c) _NOEXCEPT
: __node_(__node)
{
__get_db()->__insert_ic(this, __c);
}
#else
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_const_iterator(__node_pointer __node) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __node_(__node)
{}
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class, class, class, class> friend class __hash_table;
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_map_const_iterator;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_map;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_multimap;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
};
template <class _NodePtr>
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
class _LIBCPP_TYPE_VIS_ONLY __hash_local_iterator
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef __hash_node_types<_NodePtr> _NodeTypes;
typedef _NodePtr __node_pointer;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_pointer __node_;
size_t __bucket_;
size_t __bucket_count_;
public:
typedef forward_iterator_tag iterator_category;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef typename _NodeTypes::__node_value_type value_type;
typedef typename _NodeTypes::difference_type difference_type;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typedef value_type& reference;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef typename _NodeTypes::__node_value_type_pointer pointer;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
_LIBCPP_INLINE_VISIBILITY __hash_local_iterator() _NOEXCEPT
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_i(this);
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_local_iterator(const __hash_local_iterator& __i)
: __node_(__i.__node_),
__bucket_(__i.__bucket_),
__bucket_count_(__i.__bucket_count_)
{
__get_db()->__iterator_copy(this, &__i);
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
~__hash_local_iterator()
{
__get_db()->__erase_i(this);
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
__hash_local_iterator& operator=(const __hash_local_iterator& __i)
{
if (this != &__i)
{
__get_db()->__iterator_copy(this, &__i);
__node_ = __i.__node_;
__bucket_ = __i.__bucket_;
__bucket_count_ = __i.__bucket_count_;
}
return *this;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
reference operator*() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container local_iterator");
#endif
return __node_->__value_;
}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container local_iterator");
#endif
return pointer_traits<pointer>::pointer_to(__node_->__value_);
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_local_iterator& operator++()
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable unordered container local_iterator");
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_ = __node_->__next_;
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
if (__node_ != nullptr && __constrain_hash(__node_->__hash_, __bucket_count_) != __bucket_)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_ = nullptr;
return *this;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_local_iterator operator++(int)
{
__hash_local_iterator __t(*this);
++(*this);
return __t;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
friend _LIBCPP_INLINE_VISIBILITY
bool operator==(const __hash_local_iterator& __x, const __hash_local_iterator& __y)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{
return __x.__node_ == __y.__node_;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
friend _LIBCPP_INLINE_VISIBILITY
bool operator!=(const __hash_local_iterator& __x, const __hash_local_iterator& __y)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{return !(__x == __y);}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
private:
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_local_iterator(__node_pointer __node, size_t __bucket,
size_t __bucket_count, const void* __c) _NOEXCEPT
: __node_(__node),
__bucket_(__bucket),
__bucket_count_(__bucket_count)
{
__get_db()->__insert_ic(this, __c);
if (__node_ != nullptr)
__node_ = __node_->__next_;
}
#else
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_local_iterator(__node_pointer __node, size_t __bucket,
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
size_t __bucket_count) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __node_(__node),
__bucket_(__bucket),
__bucket_count_(__bucket_count)
{
if (__node_ != nullptr)
__node_ = __node_->__next_;
}
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class, class, class, class> friend class __hash_table;
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_const_local_iterator;
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_map_iterator;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
};
template <class _ConstNodePtr>
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
class _LIBCPP_TYPE_VIS_ONLY __hash_const_local_iterator
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef __hash_node_types<_ConstNodePtr> _NodeTypes;
typedef _ConstNodePtr __node_pointer;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_pointer __node_;
size_t __bucket_;
size_t __bucket_count_;
typedef pointer_traits<__node_pointer> __pointer_traits;
typedef typename __pointer_traits::element_type __node;
typedef typename remove_const<__node>::type __non_const_node;
Use __rebind_pointer to avoid #ifdef block llvm-svn: 256654
2015-12-31 05:52:00 +08:00
typedef typename __rebind_pointer<__node_pointer, __non_const_node>::type
__non_const_node_pointer;
Get <ext/hash_map> working again llvm-svn: 261180
2016-02-18 08:20:34 +08:00
public:
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typedef __hash_local_iterator<__non_const_node_pointer>
__non_const_iterator;
Get <ext/hash_map> working again llvm-svn: 261180
2016-02-18 08:20:34 +08:00
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef forward_iterator_tag iterator_category;
typedef typename _NodeTypes::__node_value_type value_type;
typedef typename _NodeTypes::difference_type difference_type;
typedef const value_type& reference;
typedef typename _NodeTypes::__const_node_value_type_pointer pointer;
Use __rebind_pointer to avoid #ifdef block llvm-svn: 256654
2015-12-31 05:52:00 +08:00
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
_LIBCPP_INLINE_VISIBILITY __hash_const_local_iterator() _NOEXCEPT
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_i(this);
#endif
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_const_local_iterator(const __non_const_iterator& __x) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __node_(__x.__node_),
__bucket_(__x.__bucket_),
__bucket_count_(__x.__bucket_count_)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__iterator_copy(this, &__x);
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator(const __hash_const_local_iterator& __i)
: __node_(__i.__node_),
__bucket_(__i.__bucket_),
__bucket_count_(__i.__bucket_count_)
{
__get_db()->__iterator_copy(this, &__i);
}
_LIBCPP_INLINE_VISIBILITY
~__hash_const_local_iterator()
{
__get_db()->__erase_i(this);
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator& operator=(const __hash_const_local_iterator& __i)
{
if (this != &__i)
{
__get_db()->__iterator_copy(this, &__i);
__node_ = __i.__node_;
__bucket_ = __i.__bucket_;
__bucket_count_ = __i.__bucket_count_;
}
return *this;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
reference operator*() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container const_local_iterator");
#endif
return __node_->__value_;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
pointer operator->() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container const_local_iterator");
#endif
return pointer_traits<pointer>::pointer_to(__node_->__value_);
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_const_local_iterator& operator++()
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable unordered container const_local_iterator");
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_ = __node_->__next_;
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
if (__node_ != nullptr && __constrain_hash(__node_->__hash_, __bucket_count_) != __bucket_)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_ = nullptr;
return *this;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_const_local_iterator operator++(int)
{
__hash_const_local_iterator __t(*this);
++(*this);
return __t;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
friend _LIBCPP_INLINE_VISIBILITY
bool operator==(const __hash_const_local_iterator& __x, const __hash_const_local_iterator& __y)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{
return __x.__node_ == __y.__node_;
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
friend _LIBCPP_INLINE_VISIBILITY
bool operator!=(const __hash_const_local_iterator& __x, const __hash_const_local_iterator& __y)
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
{return !(__x == __y);}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
private:
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator(__node_pointer __node, size_t __bucket,
size_t __bucket_count, const void* __c) _NOEXCEPT
: __node_(__node),
__bucket_(__bucket),
__bucket_count_(__bucket_count)
{
__get_db()->__insert_ic(this, __c);
if (__node_ != nullptr)
__node_ = __node_->__next_;
}
#else
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_const_local_iterator(__node_pointer __node, size_t __bucket,
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
size_t __bucket_count) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __node_(__node),
__bucket_(__bucket),
__bucket_count_(__bucket_count)
{
if (__node_ != nullptr)
__node_ = __node_->__next_;
}
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class, class, class, class> friend class __hash_table;
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_map_const_iterator;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
};
template <class _Alloc>
class __bucket_list_deallocator
{
typedef _Alloc allocator_type;
typedef allocator_traits<allocator_type> __alloc_traits;
typedef typename __alloc_traits::size_type size_type;
__compressed_pair<size_type, allocator_type> __data_;
public:
typedef typename __alloc_traits::pointer pointer;
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__bucket_list_deallocator()
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __data_(0) {}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__bucket_list_deallocator(const allocator_type& __a, size_type __size)
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __data_(__size, __a) {}
Changed __config to react to all of clang's currently documented has_feature flags, and renamed _LIBCPP_MOVE to _LIBCPP_HAS_NO_RVALUE_REFERENCES to be more consistent with the rest of the libc++'s flags, and with clang's nomenclature. llvm-svn: 113086
2010-09-05 07:28:19 +08:00
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__bucket_list_deallocator(__bucket_list_deallocator&& __x)
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
: __data_(_VSTD::move(__x.__data_))
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
__x.size() = 0;
}
Changed __config to react to all of clang's currently documented has_feature flags, and renamed _LIBCPP_MOVE to _LIBCPP_HAS_NO_RVALUE_REFERENCES to be more consistent with the rest of the libc++'s flags, and with clang's nomenclature. llvm-svn: 113086
2010-09-05 07:28:19 +08:00
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY
size_type& size() _NOEXCEPT {return __data_.first();}
_LIBCPP_INLINE_VISIBILITY
size_type size() const _NOEXCEPT {return __data_.first();}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY
allocator_type& __alloc() _NOEXCEPT {return __data_.second();}
_LIBCPP_INLINE_VISIBILITY
const allocator_type& __alloc() const _NOEXCEPT {return __data_.second();}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
void operator()(pointer __p) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
__alloc_traits::deallocate(__alloc(), __p, size());
}
};
Provide names for template and function parameters in forward declarations. The purpose is to aid automated documentation tools. llvm-svn: 133008
2011-06-15 03:58:17 +08:00
template <class _Alloc> class __hash_map_node_destructor;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Alloc>
class __hash_node_destructor
{
typedef _Alloc allocator_type;
typedef allocator_traits<allocator_type> __alloc_traits;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
public:
typedef typename __alloc_traits::pointer pointer;
private:
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
typedef __hash_node_types<pointer> _NodeTypes;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
allocator_type& __na_;
__hash_node_destructor& operator=(const __hash_node_destructor&);
public:
bool __value_constructed;
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Fixed PR10507 (http://llvm.org/bugs/show_bug.cgi?id=10507) llvm-svn: 136595
2011-08-01 01:04:30 +08:00
explicit __hash_node_destructor(allocator_type& __na,
bool __constructed = false) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __na_(__na),
Fixed PR10507 (http://llvm.org/bugs/show_bug.cgi?id=10507) llvm-svn: 136595
2011-08-01 01:04:30 +08:00
__value_constructed(__constructed)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
void operator()(pointer __p) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
if (__value_constructed)
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__alloc_traits::destroy(__na_, _NodeTypes::__get_ptr(__p->__value_));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (__p)
__alloc_traits::deallocate(__na_, __p, 1);
}
template <class> friend class __hash_map_node_destructor;
};
template <class _Tp, class _Hash, class _Equal, class _Alloc>
class __hash_table
{
public:
typedef _Tp value_type;
typedef _Hash hasher;
typedef _Equal key_equal;
typedef _Alloc allocator_type;
private:
typedef allocator_traits<allocator_type> __alloc_traits;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef typename
__make_hash_node_types<value_type, typename __alloc_traits::void_pointer>::type
_NodeTypes;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
public:
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
typedef typename _NodeTypes::__node_value_type __node_value_type;
typedef typename _NodeTypes::__container_value_type __container_value_type;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typedef value_type& reference;
typedef const value_type& const_reference;
typedef typename __alloc_traits::pointer pointer;
typedef typename __alloc_traits::const_pointer const_pointer;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
#ifndef _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typedef typename __alloc_traits::size_type size_type;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
#else
typedef typename _NodeTypes::size_type size_type;
#endif
typedef typename _NodeTypes::difference_type difference_type;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
public:
// Create __node
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef typename _NodeTypes::__node_type __node;
In many places, there was an #ifdef/#else block that selected one of two implmentations of rebind_alloc based on whether or not we had template aliases. Create a helper struct to encapsulate that bit of logic, and replace all the ifdefs with uses of that struct. No functionality change intented. llvm-svn: 234296
2015-04-07 13:21:38 +08:00
typedef typename __rebind_alloc_helper<__alloc_traits, __node>::type __node_allocator;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typedef allocator_traits<__node_allocator> __node_traits;
Properly down-cast a sentinal node pointer through void* llvm-svn: 260526
2016-02-11 23:22:37 +08:00
typedef typename _NodeTypes::__void_pointer __void_pointer;
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
typedef typename _NodeTypes::__node_pointer __node_pointer;
typedef typename _NodeTypes::__node_pointer __node_const_pointer;
typedef typename _NodeTypes::__node_base_type __first_node;
typedef typename _NodeTypes::__node_base_pointer __node_base_pointer;
private:
// check for sane allocator pointer rebinding semantics. Rebinding the
// allocator for a new pointer type should be exactly the same as rebinding
// the pointer using 'pointer_traits'.
static_assert((is_same<__node_pointer, typename __node_traits::pointer>::value),
"Allocator does not rebind pointers in a sane manner.");
typedef typename __rebind_alloc_helper<__node_traits, __first_node>::type
__node_base_allocator;
typedef allocator_traits<__node_base_allocator> __node_base_traits;
static_assert((is_same<__node_base_pointer, typename __node_base_traits::pointer>::value),
"Allocator does not rebind pointers in a sane manner.");
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
private:
In many places, there was an #ifdef/#else block that selected one of two implmentations of rebind_alloc based on whether or not we had template aliases. Create a helper struct to encapsulate that bit of logic, and replace all the ifdefs with uses of that struct. No functionality change intented. llvm-svn: 234296
2015-04-07 13:21:38 +08:00
typedef typename __rebind_alloc_helper<__node_traits, __node_pointer>::type __pointer_allocator;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typedef __bucket_list_deallocator<__pointer_allocator> __bucket_list_deleter;
typedef unique_ptr<__node_pointer[], __bucket_list_deleter> __bucket_list;
typedef allocator_traits<__pointer_allocator> __pointer_alloc_traits;
typedef typename __bucket_list_deleter::pointer __node_pointer_pointer;
// --- Member data begin ---
Recommit r260012 - Cleanup node-type handling in the unordered containers. This time I kept <ext/hash_map> working! This patch is the first in a series of patches that's meant to better support unordered_map. unordered_map has a special "value_type" that differs from pair<const Key, Value>. In order to meet the EmplaceConstructible and CopyInsertable requirements we need to teach __hash_table about this special value_type. This patch creates a "__hash_node_types" traits class that contains all of the typedefs needed by the unordered containers and it's iterators. These typedefs include ones for each node type and node pointer type, as well as special typedefs for "unordered_map"'s value type. As a result of this change all of the unordered containers now all support incomplete types. As a drive-by fix I changed the difference_type in __hash_table to always be ptrdiff_t. There is a corresponding change to size_type but it cannot take affect until an ABI break. This patch will be followed up shortly with fixes for various unordered_map bugs and problems. llvm-svn: 260431
2016-02-11 04:46:23 +08:00
__bucket_list __bucket_list_;
__compressed_pair<__first_node, __node_allocator> __p1_;
__compressed_pair<size_type, hasher> __p2_;
__compressed_pair<float, key_equal> __p3_;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
// --- Member data end ---
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY
size_type& size() _NOEXCEPT {return __p2_.first();}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
public:
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY
size_type size() const _NOEXCEPT {return __p2_.first();}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY
hasher& hash_function() _NOEXCEPT {return __p2_.second();}
_LIBCPP_INLINE_VISIBILITY
const hasher& hash_function() const _NOEXCEPT {return __p2_.second();}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY
float& max_load_factor() _NOEXCEPT {return __p3_.first();}
_LIBCPP_INLINE_VISIBILITY
float max_load_factor() const _NOEXCEPT {return __p3_.first();}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY
key_equal& key_eq() _NOEXCEPT {return __p3_.second();}
_LIBCPP_INLINE_VISIBILITY
const key_equal& key_eq() const _NOEXCEPT {return __p3_.second();}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY
__node_allocator& __node_alloc() _NOEXCEPT {return __p1_.second();}
_LIBCPP_INLINE_VISIBILITY
const __node_allocator& __node_alloc() const _NOEXCEPT
{return __p1_.second();}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
public:
typedef __hash_iterator<__node_pointer> iterator;
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
typedef __hash_const_iterator<__node_pointer> const_iterator;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typedef __hash_local_iterator<__node_pointer> local_iterator;
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
typedef __hash_const_local_iterator<__node_pointer> const_local_iterator;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table()
_NOEXCEPT_(
is_nothrow_default_constructible<__bucket_list>::value &&
is_nothrow_default_constructible<__first_node>::value &&
is_nothrow_default_constructible<__node_allocator>::value &&
is_nothrow_default_constructible<hasher>::value &&
is_nothrow_default_constructible<key_equal>::value);
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_table(const hasher& __hf, const key_equal& __eql);
__hash_table(const hasher& __hf, const key_equal& __eql,
const allocator_type& __a);
explicit __hash_table(const allocator_type& __a);
__hash_table(const __hash_table& __u);
__hash_table(const __hash_table& __u, const allocator_type& __a);
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table(__hash_table&& __u)
_NOEXCEPT_(
is_nothrow_move_constructible<__bucket_list>::value &&
is_nothrow_move_constructible<__first_node>::value &&
is_nothrow_move_constructible<__node_allocator>::value &&
is_nothrow_move_constructible<hasher>::value &&
is_nothrow_move_constructible<key_equal>::value);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_table(__hash_table&& __u, const allocator_type& __a);
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#endif // _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
~__hash_table();
__hash_table& operator=(const __hash_table& __u);
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table& operator=(__hash_table&& __u)
_NOEXCEPT_(
__node_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<__node_allocator>::value &&
is_nothrow_move_assignable<hasher>::value &&
is_nothrow_move_assignable<key_equal>::value);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
#endif
template <class _InputIterator>
void __assign_unique(_InputIterator __first, _InputIterator __last);
template <class _InputIterator>
void __assign_multi(_InputIterator __first, _InputIterator __last);
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
size_type max_size() const _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
return allocator_traits<__pointer_allocator>::max_size(
__bucket_list_.get_deleter().__alloc());
}
pair<iterator, bool> __node_insert_unique(__node_pointer __nd);
iterator __node_insert_multi(__node_pointer __nd);
iterator __node_insert_multi(const_iterator __p,
__node_pointer __nd);
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
template <class _Key, class ..._Args>
pair<iterator, bool> __emplace_unique_key_args(_Key const& __k, _Args&&... __args);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class... _Args>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
pair<iterator, bool> __emplace_unique(_Args&&... __args);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class... _Args>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
iterator __emplace_multi(_Args&&... __args);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class... _Args>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
iterator __emplace_hint_multi(const_iterator __p, _Args&&... __args);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Fix PR12999 - unordered_set::insert calls operator new when no insert occurs Summary: when `unordered_set::insert(value_type&&)` was called it would be treated like `unordered_set::emplace(Args&&)` and it would allocate and construct a node before trying to insert it. This caused unnecessary allocations when the value was already in the set. This patch adds an overload to `__hash_table::__insert_unique` that specifically handles `value_type&&` more link `value_type const &`. This patch also adds a single unified insert function for values into `__hash_table` called `__insert_unique_value` that handles the cases for `__insert_unique(value_type&&)` and `__insert_unique(value_type const &)`. This patch fixes PR12999: http://llvm.org/bugs/show_bug.cgi?id=12999. Reviewers: mclow.lists, titus, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7570 llvm-svn: 239666
2015-06-13 15:18:32 +08:00
_LIBCPP_INLINE_VISIBILITY
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
pair<iterator, bool>
__insert_unique(__container_value_type&& __x) {
return __emplace_unique_key_args(_NodeTypes::__get_key(__x), _VSTD::move(__x));
}
Fix PR12999 - unordered_set::insert calls operator new when no insert occurs Summary: when `unordered_set::insert(value_type&&)` was called it would be treated like `unordered_set::emplace(Args&&)` and it would allocate and construct a node before trying to insert it. This caused unnecessary allocations when the value was already in the set. This patch adds an overload to `__hash_table::__insert_unique` that specifically handles `value_type&&` more link `value_type const &`. This patch also adds a single unified insert function for values into `__hash_table` called `__insert_unique_value` that handles the cases for `__insert_unique(value_type&&)` and `__insert_unique(value_type const &)`. This patch fixes PR12999: http://llvm.org/bugs/show_bug.cgi?id=12999. Reviewers: mclow.lists, titus, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7570 llvm-svn: 239666
2015-06-13 15:18:32 +08:00
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
template <class _Pp, class = typename enable_if<
!__is_same_uncvref<_Pp, __container_value_type>::value
>::type>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __insert_unique(_Pp&& __x) {
return __emplace_unique(_VSTD::forward<_Pp>(__x));
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Further macro protection by replacing _[A-Z] with _[A-Z]p llvm-svn: 145410
2011-11-30 02:15:50 +08:00
template <class _Pp>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
_LIBCPP_INLINE_VISIBILITY
iterator __insert_multi(_Pp&& __x) {
return __emplace_multi(_VSTD::forward<_Pp>(__x));
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Further macro protection by replacing _[A-Z] with _[A-Z]p llvm-svn: 145410
2011-11-30 02:15:50 +08:00
template <class _Pp>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
_LIBCPP_INLINE_VISIBILITY
iterator __insert_multi(const_iterator __p, _Pp&& __x) {
return __emplace_hint_multi(__p, _VSTD::forward<_Pp>(__x));
}
#else // !defined(_LIBCPP_CXX03_LANG)
template <class _Key, class _Args>
pair<iterator, bool> __emplace_unique_key_args(_Key const&, _Args& __args);
iterator __insert_multi(const __container_value_type& __x);
iterator __insert_multi(const_iterator __p, const __container_value_type& __x);
#endif
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __insert_unique(const __container_value_type& __x) {
return __emplace_unique_key_args(_NodeTypes::__get_key(__x), __x);
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
void clear() _NOEXCEPT;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
void rehash(size_type __n);
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY void reserve(size_type __n)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{rehash(static_cast<size_type>(ceil(__n / max_load_factor())));}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
size_type bucket_count() const _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
return __bucket_list_.get_deleter().size();
}
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
iterator begin() _NOEXCEPT;
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
iterator end() _NOEXCEPT;
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
const_iterator begin() const _NOEXCEPT;
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
const_iterator end() const _NOEXCEPT;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Key>
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type bucket(const _Key& __k) const
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
{
_LIBCPP_ASSERT(bucket_count() > 0,
"unordered container::bucket(key) called when bucket_count() == 0");
return __constrain_hash(hash_function()(__k), bucket_count());
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Key>
iterator find(const _Key& __x);
template <class _Key>
const_iterator find(const _Key& __x) const;
Further macro protection by replacing _[A-Z] with _[A-Z]p llvm-svn: 145410
2011-11-30 02:15:50 +08:00
typedef __hash_node_destructor<__node_allocator> _Dp;
typedef unique_ptr<__node, _Dp> __node_holder;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
iterator erase(const_iterator __p);
iterator erase(const_iterator __first, const_iterator __last);
template <class _Key>
size_type __erase_unique(const _Key& __k);
template <class _Key>
size_type __erase_multi(const _Key& __k);
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__node_holder remove(const_iterator __p) _NOEXCEPT;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Key>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type __count_unique(const _Key& __k) const;
template <class _Key>
size_type __count_multi(const _Key& __k) const;
template <class _Key>
pair<iterator, iterator>
__equal_range_unique(const _Key& __k);
template <class _Key>
pair<const_iterator, const_iterator>
__equal_range_unique(const _Key& __k) const;
template <class _Key>
pair<iterator, iterator>
__equal_range_multi(const _Key& __k);
template <class _Key>
pair<const_iterator, const_iterator>
__equal_range_multi(const _Key& __k) const;
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
void swap(__hash_table& __u)
Enable and fix warnings during the build. Although CMake adds warning flags, they are ignored in the libc++ headers because the headers '#pragma system header' themselves. This patch disables the system header pragma when building libc++ and fixes the warnings that arose. The warnings fixed were: 1. <memory> - anonymous structs are a GNU extension 2. <functional> - anonymous structs are a GNU extension. 3. <__hash_table> - Embedded preprocessor directives have undefined behavior. 4. <string> - Definition is missing noexcept from declaration. 5. <__std_stream> - Unused variable. llvm-svn: 242623
2015-07-19 04:40:46 +08:00
#if _LIBCPP_STD_VER <= 11
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(
Implement the first part of N4258: 'Cleaning up noexcept in the Library'. This patch deals with swapping containers, and implements a more strict noexcept specification (a conforming extension) than the standard mandates. llvm-svn: 242056
2015-07-14 04:04:56 +08:00
__is_nothrow_swappable<hasher>::value && __is_nothrow_swappable<key_equal>::value
&& (!allocator_traits<__pointer_allocator>::propagate_on_container_swap::value
|| __is_nothrow_swappable<__pointer_allocator>::value)
&& (!__node_traits::propagate_on_container_swap::value
|| __is_nothrow_swappable<__node_allocator>::value)
);
Enable and fix warnings during the build. Although CMake adds warning flags, they are ignored in the libc++ headers because the headers '#pragma system header' themselves. This patch disables the system header pragma when building libc++ and fixes the warnings that arose. The warnings fixed were: 1. <memory> - anonymous structs are a GNU extension 2. <functional> - anonymous structs are a GNU extension. 3. <__hash_table> - Embedded preprocessor directives have undefined behavior. 4. <string> - Definition is missing noexcept from declaration. 5. <__std_stream> - Unused variable. llvm-svn: 242623
2015-07-19 04:40:46 +08:00
#else
_NOEXCEPT_(__is_nothrow_swappable<hasher>::value && __is_nothrow_swappable<key_equal>::value);
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
size_type max_bucket_count() const _NOEXCEPT
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
{return __pointer_alloc_traits::max_size(__bucket_list_.get_deleter().__alloc());}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type bucket_size(size_type __n) const;
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY float load_factor() const _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
size_type __bc = bucket_count();
return __bc != 0 ? (float)size() / __bc : 0.f;
}
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_LIBCPP_INLINE_VISIBILITY void max_load_factor(float __mlf) _NOEXCEPT
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
{
_LIBCPP_ASSERT(__mlf > 0,
"unordered container::max_load_factor(lf) called with lf <= 0");
max_load_factor() = _VSTD::max(__mlf, load_factor());
}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
_LIBCPP_INLINE_VISIBILITY
local_iterator
begin(size_type __n)
{
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::begin(n) called with n >= bucket_count()");
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return local_iterator(__bucket_list_[__n], __n, bucket_count(), this);
#else
return local_iterator(__bucket_list_[__n], __n, bucket_count());
#endif
}
_LIBCPP_INLINE_VISIBILITY
local_iterator
end(size_type __n)
{
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::end(n) called with n >= bucket_count()");
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return local_iterator(nullptr, __n, bucket_count(), this);
#else
return local_iterator(nullptr, __n, bucket_count());
#endif
}
_LIBCPP_INLINE_VISIBILITY
const_local_iterator
cbegin(size_type __n) const
{
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::cbegin(n) called with n >= bucket_count()");
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_local_iterator(__bucket_list_[__n], __n, bucket_count(), this);
#else
return const_local_iterator(__bucket_list_[__n], __n, bucket_count());
#endif
}
_LIBCPP_INLINE_VISIBILITY
const_local_iterator
cend(size_type __n) const
{
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::cend(n) called with n >= bucket_count()");
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_local_iterator(nullptr, __n, bucket_count(), this);
#else
return const_local_iterator(nullptr, __n, bucket_count());
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
bool __dereferenceable(const const_iterator* __i) const;
bool __decrementable(const const_iterator* __i) const;
bool __addable(const const_iterator* __i, ptrdiff_t __n) const;
bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const;
#endif // _LIBCPP_DEBUG_LEVEL >= 2
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
private:
void __rehash(size_type __n);
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class ..._Args>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__node_holder __construct_node(_Args&& ...__args);
template <class _First, class ..._Rest>
__node_holder __construct_node_hash(size_t __hash, _First&& __f, _Rest&&... __rest);
#else // _LIBCPP_CXX03_LANG
__node_holder __construct_node(const __container_value_type& __v);
__node_holder __construct_node_hash(size_t __hash, const __container_value_type& __v);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
#endif
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
void __copy_assign_alloc(const __hash_table& __u)
{__copy_assign_alloc(__u, integral_constant<bool,
__node_traits::propagate_on_container_copy_assignment::value>());}
void __copy_assign_alloc(const __hash_table& __u, true_type);
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
Quash a whole bunch of warnings llvm-svn: 145624
2011-12-02 04:21:04 +08:00
void __copy_assign_alloc(const __hash_table&, false_type) {}
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
void __move_assign(__hash_table& __u, false_type);
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
void __move_assign(__hash_table& __u, true_type)
_NOEXCEPT_(
is_nothrow_move_assignable<__node_allocator>::value &&
is_nothrow_move_assignable<hasher>::value &&
is_nothrow_move_assignable<key_equal>::value);
_LIBCPP_INLINE_VISIBILITY
void __move_assign_alloc(__hash_table& __u)
_NOEXCEPT_(
!__node_traits::propagate_on_container_move_assignment::value ||
(is_nothrow_move_assignable<__pointer_allocator>::value &&
is_nothrow_move_assignable<__node_allocator>::value))
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{__move_assign_alloc(__u, integral_constant<bool,
__node_traits::propagate_on_container_move_assignment::value>());}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
void __move_assign_alloc(__hash_table& __u, true_type)
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(
is_nothrow_move_assignable<__pointer_allocator>::value &&
is_nothrow_move_assignable<__node_allocator>::value)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
__bucket_list_.get_deleter().__alloc() =
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
_VSTD::move(__u.__bucket_list_.get_deleter().__alloc());
__node_alloc() = _VSTD::move(__u.__node_alloc());
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
visibility-decoration. llvm-svn: 114451
2010-09-22 01:32:39 +08:00
_LIBCPP_INLINE_VISIBILITY
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
void __move_assign_alloc(__hash_table&, false_type) _NOEXCEPT {}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#endif // _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
void __deallocate(__node_pointer __np) _NOEXCEPT;
__node_pointer __detach() _NOEXCEPT;
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
2013-08-13 02:38:34 +08:00
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_map;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_multimap;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
};
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
inline
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table()
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(
is_nothrow_default_constructible<__bucket_list>::value &&
is_nothrow_default_constructible<__first_node>::value &&
Make noexcept specifications on __hash_table definitions match their declarations. llvm-svn: 255738
2015-12-16 08:53:04 +08:00
is_nothrow_default_constructible<__node_allocator>::value &&
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
is_nothrow_default_constructible<hasher>::value &&
is_nothrow_default_constructible<key_equal>::value)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
: __p2_(0),
__p3_(1.0f)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
inline
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const hasher& __hf,
const key_equal& __eql)
: __bucket_list_(nullptr, __bucket_list_deleter()),
__p1_(),
__p2_(0, __hf),
__p3_(1.0f, __eql)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const hasher& __hf,
const key_equal& __eql,
const allocator_type& __a)
: __bucket_list_(nullptr, __bucket_list_deleter(__pointer_allocator(__a), 0)),
__p1_(__node_allocator(__a)),
__p2_(0, __hf),
__p3_(1.0f, __eql)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const allocator_type& __a)
: __bucket_list_(nullptr, __bucket_list_deleter(__pointer_allocator(__a), 0)),
__p1_(__node_allocator(__a)),
__p2_(0),
__p3_(1.0f)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const __hash_table& __u)
: __bucket_list_(nullptr,
__bucket_list_deleter(allocator_traits<__pointer_allocator>::
select_on_container_copy_construction(
__u.__bucket_list_.get_deleter().__alloc()), 0)),
__p1_(allocator_traits<__node_allocator>::
select_on_container_copy_construction(__u.__node_alloc())),
__p2_(0, __u.hash_function()),
__p3_(__u.__p3_)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const __hash_table& __u,
const allocator_type& __a)
: __bucket_list_(nullptr, __bucket_list_deleter(__pointer_allocator(__a), 0)),
__p1_(__node_allocator(__a)),
__p2_(0, __u.hash_function()),
__p3_(__u.__p3_)
{
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(__hash_table&& __u)
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(
is_nothrow_move_constructible<__bucket_list>::value &&
is_nothrow_move_constructible<__first_node>::value &&
Make noexcept specifications on __hash_table definitions match their declarations. llvm-svn: 255738
2015-12-16 08:53:04 +08:00
is_nothrow_move_constructible<__node_allocator>::value &&
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
is_nothrow_move_constructible<hasher>::value &&
is_nothrow_move_constructible<key_equal>::value)
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
: __bucket_list_(_VSTD::move(__u.__bucket_list_)),
__p1_(_VSTD::move(__u.__p1_)),
__p2_(_VSTD::move(__u.__p2_)),
__p3_(_VSTD::move(__u.__p3_))
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
if (size() > 0)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__bucket_list_[__constrain_hash(__p1_.first().__next_->__hash_, bucket_count())] =
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__u.__p1_.first().__next_ = nullptr;
__u.size() = 0;
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(__hash_table&& __u,
const allocator_type& __a)
: __bucket_list_(nullptr, __bucket_list_deleter(__pointer_allocator(__a), 0)),
__p1_(__node_allocator(__a)),
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
__p2_(0, _VSTD::move(__u.hash_function())),
__p3_(_VSTD::move(__u.__p3_))
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
if (__a == allocator_type(__u.__node_alloc()))
{
__bucket_list_.reset(__u.__bucket_list_.release());
__bucket_list_.get_deleter().size() = __u.__bucket_list_.get_deleter().size();
__u.__bucket_list_.get_deleter().size() = 0;
if (__u.size() > 0)
{
__p1_.first().__next_ = __u.__p1_.first().__next_;
__u.__p1_.first().__next_ = nullptr;
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__bucket_list_[__constrain_hash(__p1_.first().__next_->__hash_, bucket_count())] =
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size() = __u.size();
__u.size() = 0;
}
}
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#endif // _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::~__hash_table()
{
__deallocate(__p1_.first().__next_);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__erase_c(this);
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__copy_assign_alloc(
const __hash_table& __u, true_type)
{
if (__node_alloc() != __u.__node_alloc())
{
clear();
__bucket_list_.reset();
__bucket_list_.get_deleter().size() = 0;
}
__bucket_list_.get_deleter().__alloc() = __u.__bucket_list_.get_deleter().__alloc();
__node_alloc() = __u.__node_alloc();
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>&
__hash_table<_Tp, _Hash, _Equal, _Alloc>::operator=(const __hash_table& __u)
{
if (this != &__u)
{
__copy_assign_alloc(__u);
hash_function() = __u.hash_function();
key_eq() = __u.key_eq();
max_load_factor() = __u.max_load_factor();
__assign_multi(__u.begin(), __u.end());
}
return *this;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__deallocate(__node_pointer __np)
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
__node_allocator& __na = __node_alloc();
while (__np != nullptr)
{
__node_pointer __next = __np->__next_;
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
__c_node* __c = __get_db()->__find_c_and_lock(this);
for (__i_node** __p = __c->end_; __p != __c->beg_; )
{
--__p;
iterator* __i = static_cast<iterator*>((*__p)->__i_);
if (__i->__node_ == __np)
{
(*__p)->__c_ = nullptr;
if (--__c->end_ != __p)
memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
}
}
__get_db()->unlock();
#endif
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__node_traits::destroy(__na, _NodeTypes::__get_ptr(__np->__value_));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_traits::deallocate(__na, __np, 1);
__np = __next;
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_pointer
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__detach() _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
size_type __bc = bucket_count();
for (size_type __i = 0; __i < __bc; ++__i)
__bucket_list_[__i] = nullptr;
size() = 0;
__node_pointer __cache = __p1_.first().__next_;
__p1_.first().__next_ = nullptr;
return __cache;
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__move_assign(
__hash_table& __u, true_type)
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(
is_nothrow_move_assignable<__node_allocator>::value &&
is_nothrow_move_assignable<hasher>::value &&
is_nothrow_move_assignable<key_equal>::value)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
clear();
__bucket_list_.reset(__u.__bucket_list_.release());
__bucket_list_.get_deleter().size() = __u.__bucket_list_.get_deleter().size();
__u.__bucket_list_.get_deleter().size() = 0;
__move_assign_alloc(__u);
size() = __u.size();
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
hash_function() = _VSTD::move(__u.hash_function());
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
max_load_factor() = __u.max_load_factor();
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
key_eq() = _VSTD::move(__u.key_eq());
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__p1_.first().__next_ = __u.__p1_.first().__next_;
if (size() > 0)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__bucket_list_[__constrain_hash(__p1_.first().__next_->__hash_, bucket_count())] =
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__u.__p1_.first().__next_ = nullptr;
__u.size() = 0;
}
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->swap(this, &__u);
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__move_assign(
__hash_table& __u, false_type)
{
if (__node_alloc() == __u.__node_alloc())
__move_assign(__u, true_type());
else
{
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
hash_function() = _VSTD::move(__u.hash_function());
key_eq() = _VSTD::move(__u.key_eq());
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
max_load_factor() = __u.max_load_factor();
if (bucket_count() != 0)
{
__node_pointer __cache = __detach();
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
#endif // _LIBCPP_NO_EXCEPTIONS
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
const_iterator __i = __u.begin();
while (__cache != nullptr && __u.size() != 0)
{
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
__cache->__value_ = _VSTD::move(__u.remove(__i++)->__value_);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_pointer __next = __cache->__next_;
__node_insert_multi(__cache);
__cache = __next;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__deallocate(__cache);
throw;
}
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
#endif // _LIBCPP_NO_EXCEPTIONS
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__deallocate(__cache);
}
const_iterator __i = __u.begin();
while (__u.size() != 0)
{
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__node_holder __h = __construct_node(_NodeTypes::__move(__u.remove(__i++)->__value_));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_insert_multi(__h.get());
__h.release();
}
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
inline
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>&
__hash_table<_Tp, _Hash, _Equal, _Alloc>::operator=(__hash_table&& __u)
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(
__node_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<__node_allocator>::value &&
is_nothrow_move_assignable<hasher>::value &&
is_nothrow_move_assignable<key_equal>::value)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
__move_assign(__u, integral_constant<bool,
__node_traits::propagate_on_container_move_assignment::value>());
return *this;
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#endif // _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _InputIterator>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__assign_unique(_InputIterator __first,
_InputIterator __last)
{
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
typedef iterator_traits<_InputIterator> _ITraits;
typedef typename _ITraits::value_type _ItValueType;
static_assert((is_same<_ItValueType, __container_value_type>::value),
"__assign_unique may only be called with the containers value type");
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (bucket_count() != 0)
{
__node_pointer __cache = __detach();
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
#endif // _LIBCPP_NO_EXCEPTIONS
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
for (; __cache != nullptr && __first != __last; ++__first)
{
__cache->__value_ = *__first;
__node_pointer __next = __cache->__next_;
__node_insert_unique(__cache);
__cache = __next;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__deallocate(__cache);
throw;
}
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
#endif // _LIBCPP_NO_EXCEPTIONS
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__deallocate(__cache);
}
for (; __first != __last; ++__first)
__insert_unique(*__first);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _InputIterator>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__assign_multi(_InputIterator __first,
_InputIterator __last)
{
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
typedef iterator_traits<_InputIterator> _ITraits;
typedef typename _ITraits::value_type _ItValueType;
static_assert((is_same<_ItValueType, __container_value_type>::value ||
is_same<_ItValueType, __node_value_type>::value),
"__assign_multi may only be called with the containers value type"
" or the nodes value type");
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (bucket_count() != 0)
{
__node_pointer __cache = __detach();
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
#endif // _LIBCPP_NO_EXCEPTIONS
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
for (; __cache != nullptr && __first != __last; ++__first)
{
__cache->__value_ = *__first;
__node_pointer __next = __cache->__next_;
__node_insert_multi(__cache);
__cache = __next;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__deallocate(__cache);
throw;
}
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
#endif // _LIBCPP_NO_EXCEPTIONS
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__deallocate(__cache);
}
for (; __first != __last; ++__first)
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__insert_multi(_NodeTypes::__get_value(*__first));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
inline
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::begin() _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(__p1_.first().__next_, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return iterator(__p1_.first().__next_);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
inline
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::end() _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(nullptr, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return iterator(nullptr);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
inline
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::begin() const _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_iterator(__p1_.first().__next_, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return const_iterator(__p1_.first().__next_);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
inline
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::end() const _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_iterator(nullptr, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return const_iterator(nullptr);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::clear() _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
if (size() > 0)
{
__deallocate(__p1_.first().__next_);
__p1_.first().__next_ = nullptr;
size_type __bc = bucket_count();
Fix uninitialized loop counter. http://llvm.org/bugs/show_bug.cgi?id=10278 llvm-svn: 134405
2011-07-05 22:14:17 +08:00
for (size_type __i = 0; __i < __bc; ++__i)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__bucket_list_[__i] = nullptr;
size() = 0;
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_insert_unique(__node_pointer __nd)
{
__nd->__hash_ = hash_function()(__nd->__value_);
size_type __bc = bucket_count();
bool __inserted = false;
__node_pointer __ndptr;
size_t __chash;
if (__bc != 0)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__chash = __constrain_hash(__nd->__hash_, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__ndptr = __bucket_list_[__chash];
if (__ndptr != nullptr)
{
for (__ndptr = __ndptr->__next_; __ndptr != nullptr &&
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__constrain_hash(__ndptr->__hash_, __bc) == __chash;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__ndptr = __ndptr->__next_)
{
if (key_eq()(__ndptr->__value_, __nd->__value_))
goto __done;
}
}
}
{
if (size()+1 > __bc * max_load_factor() || __bc == 0)
{
Rename pow2 functions in __hash_table to reflect that they are hash specific llvm-svn: 227866
2015-02-03 05:31:48 +08:00
rehash(_VSTD::max<size_type>(2 * __bc + !__is_hash_power2(__bc),
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type(ceil(float(size() + 1) / max_load_factor()))));
__bc = bucket_count();
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__chash = __constrain_hash(__nd->__hash_, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
// insert_after __bucket_list_[__chash], or __first_node if bucket is null
__node_pointer __pn = __bucket_list_[__chash];
if (__pn == nullptr)
{
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
__pn = static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__nd->__next_ = __pn->__next_;
__pn->__next_ = __nd;
// fix up __bucket_list_
__bucket_list_[__chash] = __pn;
if (__nd->__next_ != nullptr)
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__bucket_list_[__constrain_hash(__nd->__next_->__hash_, __bc)] = __nd;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
else
{
__nd->__next_ = __pn->__next_;
__pn->__next_ = __nd;
}
__ndptr = __nd;
// increment size
++size();
__inserted = true;
}
__done:
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return pair<iterator, bool>(iterator(__ndptr, this), __inserted);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return pair<iterator, bool>(iterator(__ndptr), __inserted);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_insert_multi(__node_pointer __cp)
{
__cp->__hash_ = hash_function()(__cp->__value_);
size_type __bc = bucket_count();
if (size()+1 > __bc * max_load_factor() || __bc == 0)
{
Rename pow2 functions in __hash_table to reflect that they are hash specific llvm-svn: 227866
2015-02-03 05:31:48 +08:00
rehash(_VSTD::max<size_type>(2 * __bc + !__is_hash_power2(__bc),
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type(ceil(float(size() + 1) / max_load_factor()))));
__bc = bucket_count();
}
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
size_t __chash = __constrain_hash(__cp->__hash_, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_pointer __pn = __bucket_list_[__chash];
if (__pn == nullptr)
{
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
__pn = static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__cp->__next_ = __pn->__next_;
__pn->__next_ = __cp;
// fix up __bucket_list_
__bucket_list_[__chash] = __pn;
if (__cp->__next_ != nullptr)
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__bucket_list_[__constrain_hash(__cp->__next_->__hash_, __bc)] = __cp;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
else
{
for (bool __found = false; __pn->__next_ != nullptr &&
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__constrain_hash(__pn->__next_->__hash_, __bc) == __chash;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__pn = __pn->__next_)
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
{
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
// __found key_eq() action
// false false loop
// true true loop
// false true set __found to true
// true false break
if (__found != (__pn->__next_->__hash_ == __cp->__hash_ &&
key_eq()(__pn->__next_->__value_, __cp->__value_)))
{
if (!__found)
__found = true;
else
break;
}
}
__cp->__next_ = __pn->__next_;
__pn->__next_ = __cp;
if (__cp->__next_ != nullptr)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
size_t __nhash = __constrain_hash(__cp->__next_->__hash_, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (__nhash != __chash)
__bucket_list_[__nhash] = __cp;
}
}
++size();
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(__cp, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return iterator(__cp);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_insert_multi(
const_iterator __p, __node_pointer __cp)
{
debug mode for unordered_map. Also picked up a missing check and test in unordered_multimap. This wraps up debug mode for the unordered containers. llvm-svn: 187659
2013-08-03 01:50:49 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::emplace_hint(const_iterator, args...) called with an iterator not"
" referring to this unordered container");
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (__p != end() && key_eq()(*__p, __cp->__value_))
{
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
__node_pointer __np = __p.__node_;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__cp->__hash_ = __np->__hash_;
size_type __bc = bucket_count();
if (size()+1 > __bc * max_load_factor() || __bc == 0)
{
Rename pow2 functions in __hash_table to reflect that they are hash specific llvm-svn: 227866
2015-02-03 05:31:48 +08:00
rehash(_VSTD::max<size_type>(2 * __bc + !__is_hash_power2(__bc),
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type(ceil(float(size() + 1) / max_load_factor()))));
__bc = bucket_count();
}
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
size_t __chash = __constrain_hash(__cp->__hash_, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_pointer __pp = __bucket_list_[__chash];
while (__pp->__next_ != __np)
__pp = __pp->__next_;
__cp->__next_ = __np;
__pp->__next_ = __cp;
++size();
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(__cp, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return iterator(__cp);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
return __node_insert_multi(__cp);
}
Fix PR12999 - unordered_set::insert calls operator new when no insert occurs Summary: when `unordered_set::insert(value_type&&)` was called it would be treated like `unordered_set::emplace(Args&&)` and it would allocate and construct a node before trying to insert it. This caused unnecessary allocations when the value was already in the set. This patch adds an overload to `__hash_table::__insert_unique` that specifically handles `value_type&&` more link `value_type const &`. This patch also adds a single unified insert function for values into `__hash_table` called `__insert_unique_value` that handles the cases for `__insert_unique(value_type&&)` and `__insert_unique(value_type const &)`. This patch fixes PR12999: http://llvm.org/bugs/show_bug.cgi?id=12999. Reviewers: mclow.lists, titus, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7570 llvm-svn: 239666
2015-06-13 15:18:32 +08:00
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
Fix PR12999 - unordered_set::insert calls operator new when no insert occurs Summary: when `unordered_set::insert(value_type&&)` was called it would be treated like `unordered_set::emplace(Args&&)` and it would allocate and construct a node before trying to insert it. This caused unnecessary allocations when the value was already in the set. This patch adds an overload to `__hash_table::__insert_unique` that specifically handles `value_type&&` more link `value_type const &`. This patch also adds a single unified insert function for values into `__hash_table` called `__insert_unique_value` that handles the cases for `__insert_unique(value_type&&)` and `__insert_unique(value_type const &)`. This patch fixes PR12999: http://llvm.org/bugs/show_bug.cgi?id=12999. Reviewers: mclow.lists, titus, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7570 llvm-svn: 239666
2015-06-13 15:18:32 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
template <class _Key, class ..._Args>
Fix PR12999 - unordered_set::insert calls operator new when no insert occurs Summary: when `unordered_set::insert(value_type&&)` was called it would be treated like `unordered_set::emplace(Args&&)` and it would allocate and construct a node before trying to insert it. This caused unnecessary allocations when the value was already in the set. This patch adds an overload to `__hash_table::__insert_unique` that specifically handles `value_type&&` more link `value_type const &`. This patch also adds a single unified insert function for values into `__hash_table` called `__insert_unique_value` that handles the cases for `__insert_unique(value_type&&)` and `__insert_unique(value_type const &)`. This patch fixes PR12999: http://llvm.org/bugs/show_bug.cgi?id=12999. Reviewers: mclow.lists, titus, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7570 llvm-svn: 239666
2015-06-13 15:18:32 +08:00
_LIBCPP_INLINE_VISIBILITY
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_unique_key_args(_Key const& __k, _Args&&... __args)
Fix PR12999 - unordered_set::insert calls operator new when no insert occurs Summary: when `unordered_set::insert(value_type&&)` was called it would be treated like `unordered_set::emplace(Args&&)` and it would allocate and construct a node before trying to insert it. This caused unnecessary allocations when the value was already in the set. This patch adds an overload to `__hash_table::__insert_unique` that specifically handles `value_type&&` more link `value_type const &`. This patch also adds a single unified insert function for values into `__hash_table` called `__insert_unique_value` that handles the cases for `__insert_unique(value_type&&)` and `__insert_unique(value_type const &)`. This patch fixes PR12999: http://llvm.org/bugs/show_bug.cgi?id=12999. Reviewers: mclow.lists, titus, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7570 llvm-svn: 239666
2015-06-13 15:18:32 +08:00
#else
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
template <class _Key, class _Args>
Fix PR12999 - unordered_set::insert calls operator new when no insert occurs Summary: when `unordered_set::insert(value_type&&)` was called it would be treated like `unordered_set::emplace(Args&&)` and it would allocate and construct a node before trying to insert it. This caused unnecessary allocations when the value was already in the set. This patch adds an overload to `__hash_table::__insert_unique` that specifically handles `value_type&&` more link `value_type const &`. This patch also adds a single unified insert function for values into `__hash_table` called `__insert_unique_value` that handles the cases for `__insert_unique(value_type&&)` and `__insert_unique(value_type const &)`. This patch fixes PR12999: http://llvm.org/bugs/show_bug.cgi?id=12999. Reviewers: mclow.lists, titus, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7570 llvm-svn: 239666
2015-06-13 15:18:32 +08:00
_LIBCPP_INLINE_VISIBILITY
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_unique_key_args(_Key const& __k, _Args& __args)
Fix PR12999 - unordered_set::insert calls operator new when no insert occurs Summary: when `unordered_set::insert(value_type&&)` was called it would be treated like `unordered_set::emplace(Args&&)` and it would allocate and construct a node before trying to insert it. This caused unnecessary allocations when the value was already in the set. This patch adds an overload to `__hash_table::__insert_unique` that specifically handles `value_type&&` more link `value_type const &`. This patch also adds a single unified insert function for values into `__hash_table` called `__insert_unique_value` that handles the cases for `__insert_unique(value_type&&)` and `__insert_unique(value_type const &)`. This patch fixes PR12999: http://llvm.org/bugs/show_bug.cgi?id=12999. Reviewers: mclow.lists, titus, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7570 llvm-svn: 239666
2015-06-13 15:18:32 +08:00
#endif
{
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
size_t __hash = hash_function()(__k);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type __bc = bucket_count();
bool __inserted = false;
__node_pointer __nd;
size_t __chash;
if (__bc != 0)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__chash = __constrain_hash(__hash, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__nd = __bucket_list_[__chash];
if (__nd != nullptr)
{
for (__nd = __nd->__next_; __nd != nullptr &&
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__constrain_hash(__nd->__hash_, __bc) == __chash;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__nd = __nd->__next_)
{
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
if (key_eq()(__nd->__value_, __k))
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
goto __done;
}
}
}
{
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
__node_holder __h = __construct_node_hash(__hash, _VSTD::forward<_Args>(__args)...);
#else
__node_holder __h = __construct_node_hash(__hash, __args);
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (size()+1 > __bc * max_load_factor() || __bc == 0)
{
Rename pow2 functions in __hash_table to reflect that they are hash specific llvm-svn: 227866
2015-02-03 05:31:48 +08:00
rehash(_VSTD::max<size_type>(2 * __bc + !__is_hash_power2(__bc),
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type(ceil(float(size() + 1) / max_load_factor()))));
__bc = bucket_count();
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__chash = __constrain_hash(__hash, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
// insert_after __bucket_list_[__chash], or __first_node if bucket is null
__node_pointer __pn = __bucket_list_[__chash];
if (__pn == nullptr)
{
Properly down-cast a sentinal node pointer through void* llvm-svn: 260526
2016-02-11 23:22:37 +08:00
__pn = static_cast<__node_pointer>(static_cast<__void_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first())));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__h->__next_ = __pn->__next_;
__pn->__next_ = __h.get();
// fix up __bucket_list_
__bucket_list_[__chash] = __pn;
if (__h->__next_ != nullptr)
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__bucket_list_[__constrain_hash(__h->__next_->__hash_, __bc)] = __h.get();
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
else
{
__h->__next_ = __pn->__next_;
__pn->__next_ = __h.get();
}
__nd = __h.release();
// increment size
++size();
__inserted = true;
}
__done:
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return pair<iterator, bool>(iterator(__nd, this), __inserted);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return pair<iterator, bool>(iterator(__nd), __inserted);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class... _Args>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_unique(_Args&&... __args)
{
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
__node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
pair<iterator, bool> __r = __node_insert_unique(__h.get());
if (__r.second)
__h.release();
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class... _Args>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_multi(_Args&&... __args)
{
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
__node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
iterator __r = __node_insert_multi(__h.get());
__h.release();
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class... _Args>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_hint_multi(
const_iterator __p, _Args&&... __args)
{
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::emplace_hint(const_iterator, args...) called with an iterator not"
" referring to this unordered container");
#endif
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
__node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
iterator __r = __node_insert_multi(__p, __h.get());
__h.release();
return __r;
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#else // _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_multi(const __container_value_type& __x)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
__node_holder __h = __construct_node(__x);
iterator __r = __node_insert_multi(__h.get());
__h.release();
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_multi(const_iterator __p,
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
const __container_value_type& __x)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::insert(const_iterator, lvalue) called with an iterator not"
" referring to this unordered container");
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_holder __h = __construct_node(__x);
iterator __r = __node_insert_multi(__p, __h.get());
__h.release();
return __r;
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#endif // _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::rehash(size_type __n)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
if (__n == 1)
__n = 2;
else if (__n & (__n - 1))
__n = __next_prime(__n);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type __bc = bucket_count();
if (__n > __bc)
__rehash(__n);
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
else if (__n < __bc)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
__n = _VSTD::max<size_type>
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
(
__n,
Rename pow2 functions in __hash_table to reflect that they are hash specific llvm-svn: 227866
2015-02-03 05:31:48 +08:00
__is_hash_power2(__bc) ? __next_hash_pow2(size_t(ceil(float(size()) / max_load_factor()))) :
__next_prime(size_t(ceil(float(size()) / max_load_factor())))
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
);
if (__n < __bc)
__rehash(__n);
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__rehash(size_type __nbc)
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__invalidate_all(this);
#endif // _LIBCPP_DEBUG_LEVEL >= 2
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__pointer_allocator& __npa = __bucket_list_.get_deleter().__alloc();
__bucket_list_.reset(__nbc > 0 ?
__pointer_alloc_traits::allocate(__npa, __nbc) : nullptr);
__bucket_list_.get_deleter().size() = __nbc;
if (__nbc > 0)
{
for (size_type __i = 0; __i < __nbc; ++__i)
__bucket_list_[__i] = nullptr;
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
__node_pointer __pp(static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first())));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_pointer __cp = __pp->__next_;
if (__cp != nullptr)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
size_type __chash = __constrain_hash(__cp->__hash_, __nbc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__bucket_list_[__chash] = __pp;
size_type __phash = __chash;
for (__pp = __cp, __cp = __cp->__next_; __cp != nullptr;
__cp = __pp->__next_)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__chash = __constrain_hash(__cp->__hash_, __nbc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (__chash == __phash)
__pp = __cp;
else
{
if (__bucket_list_[__chash] == nullptr)
{
__bucket_list_[__chash] = __pp;
__pp = __cp;
__phash = __chash;
}
else
{
__node_pointer __np = __cp;
for (; __np->__next_ != nullptr &&
key_eq()(__cp->__value_, __np->__next_->__value_);
__np = __np->__next_)
;
__pp->__next_ = __np->__next_;
__np->__next_ = __bucket_list_[__chash]->__next_;
__bucket_list_[__chash]->__next_ = __cp;
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
}
}
}
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::find(const _Key& __k)
{
size_t __hash = hash_function()(__k);
size_type __bc = bucket_count();
if (__bc != 0)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
size_t __chash = __constrain_hash(__hash, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_pointer __nd = __bucket_list_[__chash];
if (__nd != nullptr)
{
for (__nd = __nd->__next_; __nd != nullptr &&
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__constrain_hash(__nd->__hash_, __bc) == __chash;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__nd = __nd->__next_)
{
if (key_eq()(__nd->__value_, __k))
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(__nd, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return iterator(__nd);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
}
}
return end();
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::find(const _Key& __k) const
{
size_t __hash = hash_function()(__k);
size_type __bc = bucket_count();
if (__bc != 0)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
size_t __chash = __constrain_hash(__hash, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_const_pointer __nd = __bucket_list_[__chash];
if (__nd != nullptr)
{
for (__nd = __nd->__next_; __nd != nullptr &&
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__constrain_hash(__nd->__hash_, __bc) == __chash;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__nd = __nd->__next_)
{
if (key_eq()(__nd->__value_, __k))
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_iterator(__nd, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return const_iterator(__nd);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
}
Fixing whitespace problems llvm-svn: 111750
2010-08-22 08:02:43 +08:00
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
return end();
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#ifndef _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class ..._Args>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__construct_node(_Args&& ...__args)
{
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
static_assert(!__is_hash_value_type<_Args...>::value,
"Construct cannot be called with a hash value type");
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_allocator& __na = __node_alloc();
Further macro protection by replacing _[A-Z] with _[A-Z]p llvm-svn: 145410
2011-11-30 02:15:50 +08:00
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_), _VSTD::forward<_Args>(__args)...);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__h.get_deleter().__value_constructed = true;
__h->__hash_ = hash_function()(__h->__value_);
__h->__next_ = nullptr;
return __h;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
template <class _First, class ..._Rest>
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__construct_node_hash(
size_t __hash, _First&& __f, _Rest&& ...__rest)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
static_assert(!__is_hash_value_type<_First, _Rest...>::value,
"Construct cannot be called with a hash value type");
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_allocator& __na = __node_alloc();
Further macro protection by replacing _[A-Z] with _[A-Z]p llvm-svn: 145410
2011-11-30 02:15:50 +08:00
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_),
_VSTD::forward<_First>(__f),
_VSTD::forward<_Rest>(__rest)...);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__h.get_deleter().__value_constructed = true;
__h->__hash_ = __hash;
__h->__next_ = nullptr;
Zhihao Yuan noted that there were a few unneeded statements. Eliminated the unnecessary ones, and commented the ones that are there for non-obvious reasons such as to help things limp along in C++03 language mode. llvm-svn: 189039
2013-08-23 02:29:50 +08:00
return __h;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#else // _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__construct_node(const __container_value_type& __v)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
__node_allocator& __na = __node_alloc();
Further macro protection by replacing _[A-Z] with _[A-Z]p llvm-svn: 145410
2011-11-30 02:15:50 +08:00
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_), __v);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__h.get_deleter().__value_constructed = true;
__h->__hash_ = hash_function()(__h->__value_);
__h->__next_ = nullptr;
Fix warnings about pessimizing return moves for C++11 and higher Summary: Throughout the libc++ headers, there are a few instances where _VSTD::move() is used to return a local variable. Howard commented in r189039 that these were there "for non-obvious reasons such as to help things limp along in C++03 language mode". However, when compiling these headers with warnings on, and in C++11 or higher mode (like we do in FreeBSD), they cause the following complaints about pessimizing moves: In file included from tests.cpp:26: In file included from tests.hpp:29: /usr/include/c++/v1/map:1368:12: error: moving a local object in a return statement prevents copy elision [-Werror,-Wpessimizing-move] return _VSTD::move(__h); // explicitly moved for C++03 ^ /usr/include/c++/v1/__config:368:15: note: expanded from macro '_VSTD' #define _VSTD std::_LIBCPP_NAMESPACE ^ Attempt to fix this by adding a _LIBCPP_EXPLICIT_MOVE() macro to __config, which gets defined to _VSTD::move for pre-C++11, and to nothing for C++11 and later. I am not completely satisfied with the macro name (I also considered _LIBCPP_COMPAT_MOVE and some other variants), so suggestions are welcome. :) Reviewers: mclow.lists, howard.hinnant, EricWF Subscribers: arthur.j.odwyer, cfe-commits Differential Revision: http://reviews.llvm.org/D11394 llvm-svn: 245421
2015-08-19 14:43:33 +08:00
return _LIBCPP_EXPLICIT_MOVE(__h); // explicitly moved for C++03
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__construct_node_hash(size_t __hash,
const __container_value_type& __v)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
__node_allocator& __na = __node_alloc();
Further macro protection by replacing _[A-Z] with _[A-Z]p llvm-svn: 145410
2011-11-30 02:15:50 +08:00
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
__node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_), __v);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__h.get_deleter().__value_constructed = true;
__h->__hash_ = __hash;
__h->__next_ = nullptr;
Fix warnings about pessimizing return moves for C++11 and higher Summary: Throughout the libc++ headers, there are a few instances where _VSTD::move() is used to return a local variable. Howard commented in r189039 that these were there "for non-obvious reasons such as to help things limp along in C++03 language mode". However, when compiling these headers with warnings on, and in C++11 or higher mode (like we do in FreeBSD), they cause the following complaints about pessimizing moves: In file included from tests.cpp:26: In file included from tests.hpp:29: /usr/include/c++/v1/map:1368:12: error: moving a local object in a return statement prevents copy elision [-Werror,-Wpessimizing-move] return _VSTD::move(__h); // explicitly moved for C++03 ^ /usr/include/c++/v1/__config:368:15: note: expanded from macro '_VSTD' #define _VSTD std::_LIBCPP_NAMESPACE ^ Attempt to fix this by adding a _LIBCPP_EXPLICIT_MOVE() macro to __config, which gets defined to _VSTD::move for pre-C++11, and to nothing for C++11 and later. I am not completely satisfied with the macro name (I also considered _LIBCPP_COMPAT_MOVE and some other variants), so suggestions are welcome. :) Reviewers: mclow.lists, howard.hinnant, EricWF Subscribers: arthur.j.odwyer, cfe-commits Differential Revision: http://reviews.llvm.org/D11394 llvm-svn: 245421
2015-08-19 14:43:33 +08:00
return _LIBCPP_EXPLICIT_MOVE(__h); // explicitly moved for C++03
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
Teach __hash_table how to handle unordered_map's __hash_value_type. This patch is fairly large and contains a number of changes. The main change is teaching '__hash_table' how to handle '__hash_value_type'. Unfortunately this change is a rampant layering violation, but it's required to make unordered_map conforming without re-writing all of __hash_table. After this change 'unordered_map' can delegate to '__hash_table' in almost all cases. The major changes found in this patch are: * Teach __hash_table to differentiate between the true container value type and the node value type by introducing the "__container_value_type" and "__node_value_type" typedefs. In the case of unordered_map '__container_value_type' is 'pair<const Key, Value>' and '__node_value_type' is '__hash_value_type'. * Switch almost all overloads in '__hash_table' previously taking 'value_type' (AKA '__node_value_type) to take '__container_value_type' instead. Previously 'pair<K, V>' would be implicitly converted to '__hash_value_type<K, V>' because of the function signature. * Add '__get_key', '__get_value', '__get_ptr', and '__move' static functions to '__key_value_types'. These functions allow '__hash_table' to unwrap '__node_value_type' objects into '__container_value_type' and its sub-parts. * Pass '__hash_value_type::__value_' to 'a.construct(p, ...)' instead of '__hash_value_type' itself. The C++14 standard requires that 'a.construct()' and 'a.destroy()' are only ever instantiated for the containers value type. * Remove '__hash_value_type's constructors and destructors. We should never construct an instance of this type. (TODO this is UB but we already do it in plenty of places). * Add a generic "try-emplace" function to '__hash_table' called '__emplace_unique_key_args(Key const&, Args...)'. The following changes were done as cleanup: * Introduce the '_LIBCPP_CXX03_LANG' macro to be used in place of '_LIBCPP_HAS_NO_VARIADICS' or '_LIBCPP_HAS_NO_RVALUE_REFERENCE'. * Cleanup C++11 only overloads that assume an incomplete C++11 implementation. For example this patch removes the __construct_node overloads that do manual pack expansion. * Forward 'unordered_map::emplace' to '__hash_table' and remove dead code resulting from the change. This includes almost all 'unordered_map::__construct_node' overloads. The following changes are planed for future revisions: * Fix LWG issue #2469 by delegating 'unordered_map::operator[]' to use '__emplace_unique_key_args'. * Rewrite 'unordered_map::try_emplace' in terms of '__emplace_unique_key_args'. * Optimize '__emplace_unique' to call '__emplace_unique_key_args' when possible. This prevent unneeded allocations when inserting duplicate entries. The additional follow up work needed after this patch: * Respect the lifetime rules for '__hash_value_type' by actually constructing it. * Make '__insert_multi' act similar to '__insert_unique' for objects of type 'T&' and 'T const &&' with 'T = __container_value_type'. llvm-svn: 260513
2016-02-11 19:59:44 +08:00
#endif // _LIBCPP_CXX03_LANG
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::erase(const_iterator __p)
{
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
__node_pointer __np = __p.__node_;
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container erase(iterator) called with an iterator not"
" referring to this container");
_LIBCPP_ASSERT(__p != end(),
"unordered container erase(iterator) called with a non-dereferenceable iterator");
iterator __r(__np, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
iterator __r(__np);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
++__r;
remove(__p);
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::erase(const_iterator __first,
const_iterator __last)
{
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this,
"unodered container::erase(iterator, iterator) called with an iterator not"
" referring to this unodered container");
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__last) == this,
"unodered container::erase(iterator, iterator) called with an iterator not"
" referring to this unodered container");
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
for (const_iterator __p = __first; __first != __last; __p = __first)
{
++__first;
erase(__p);
}
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
__node_pointer __np = __last.__node_;
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator (__np, this);
#else
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
return iterator (__np);
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__erase_unique(const _Key& __k)
{
iterator __i = find(__k);
if (__i == end())
return 0;
erase(__i);
return 1;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__erase_multi(const _Key& __k)
{
size_type __r = 0;
iterator __i = find(__k);
if (__i != end())
{
iterator __e = end();
do
{
erase(__i++);
++__r;
} while (__i != __e && key_eq()(*__i, __k));
}
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
__hash_table<_Tp, _Hash, _Equal, _Alloc>::remove(const_iterator __p) _NOEXCEPT
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
// current node
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
__node_pointer __cn = __p.__node_;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
size_type __bc = bucket_count();
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
size_t __chash = __constrain_hash(__cn->__hash_, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
// find previous node
__node_pointer __pn = __bucket_list_[__chash];
for (; __pn->__next_ != __cn; __pn = __pn->__next_)
;
// Fix up __bucket_list_
// if __pn is not in same bucket (before begin is not in same bucket) &&
// if __cn->__next_ is not in same bucket (nullptr is not in same bucket)
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
if (__pn == static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()))
|| __constrain_hash(__pn->__hash_, __bc) != __chash)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
if (__cn->__next_ == nullptr || __constrain_hash(__cn->__next_->__hash_, __bc) != __chash)
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__bucket_list_[__chash] = nullptr;
}
// if __cn->__next_ is not in same bucket (nullptr is in same bucket)
if (__cn->__next_ != nullptr)
{
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
size_t __nhash = __constrain_hash(__cn->__next_->__hash_, __bc);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (__nhash != __chash)
__bucket_list_[__nhash] = __pn;
}
// remove __cn
__pn->__next_ = __cn->__next_;
__cn->__next_ = nullptr;
--size();
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
__c_node* __c = __get_db()->__find_c_and_lock(this);
for (__i_node** __p = __c->end_; __p != __c->beg_; )
{
--__p;
iterator* __i = static_cast<iterator*>((*__p)->__i_);
if (__i->__node_ == __cn)
{
(*__p)->__c_ = nullptr;
if (--__c->end_ != __p)
memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
}
}
__get_db()->unlock();
#endif
Further macro protection by replacing _[A-Z] with _[A-Z]p llvm-svn: 145410
2011-11-30 02:15:50 +08:00
return __node_holder(__cn, _Dp(__node_alloc(), true));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
Cleanup: move visibility/linkage attributes to the first declaration. This change moves visibility attributes from out-of-class method definitions to in-class declaration. This is needed for a switch to attribute((internal_linkage)) (see http://reviews.llvm.org/D13925) which can only appear on the first declaration. This change does not touch istream/ostream/streambuf. They are handled separately in http://reviews.llvm.org/D14409. llvm-svn: 252385
2015-11-07 09:22:13 +08:00
inline
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__count_unique(const _Key& __k) const
{
return static_cast<size_type>(find(__k) != end());
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__count_multi(const _Key& __k) const
{
size_type __r = 0;
const_iterator __i = find(__k);
if (__i != end())
{
const_iterator __e = end();
do
{
++__i;
++__r;
} while (__i != __e && key_eq()(*__i, __k));
}
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator,
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__equal_range_unique(
const _Key& __k)
{
iterator __i = find(__k);
iterator __j = __i;
if (__i != end())
++__j;
return pair<iterator, iterator>(__i, __j);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator,
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__equal_range_unique(
const _Key& __k) const
{
const_iterator __i = find(__k);
const_iterator __j = __i;
if (__i != end())
++__j;
return pair<const_iterator, const_iterator>(__i, __j);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator,
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__equal_range_multi(
const _Key& __k)
{
iterator __i = find(__k);
iterator __j = __i;
if (__i != end())
{
iterator __e = end();
do
{
++__j;
} while (__j != __e && key_eq()(*__j, __k));
}
return pair<iterator, iterator>(__i, __j);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator,
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__equal_range_multi(
const _Key& __k) const
{
const_iterator __i = find(__k);
const_iterator __j = __i;
if (__i != end())
{
const_iterator __e = end();
do
{
++__j;
} while (__j != __e && key_eq()(*__j, __k));
}
return pair<const_iterator, const_iterator>(__i, __j);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::swap(__hash_table& __u)
Enable and fix warnings during the build. Although CMake adds warning flags, they are ignored in the libc++ headers because the headers '#pragma system header' themselves. This patch disables the system header pragma when building libc++ and fixes the warnings that arose. The warnings fixed were: 1. <memory> - anonymous structs are a GNU extension 2. <functional> - anonymous structs are a GNU extension. 3. <__hash_table> - Embedded preprocessor directives have undefined behavior. 4. <string> - Definition is missing noexcept from declaration. 5. <__std_stream> - Unused variable. llvm-svn: 242623
2015-07-19 04:40:46 +08:00
#if _LIBCPP_STD_VER <= 11
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
_NOEXCEPT_(
Implement the first part of N4258: 'Cleaning up noexcept in the Library'. This patch deals with swapping containers, and implements a more strict noexcept specification (a conforming extension) than the standard mandates. llvm-svn: 242056
2015-07-14 04:04:56 +08:00
__is_nothrow_swappable<hasher>::value && __is_nothrow_swappable<key_equal>::value
&& (!allocator_traits<__pointer_allocator>::propagate_on_container_swap::value
|| __is_nothrow_swappable<__pointer_allocator>::value)
&& (!__node_traits::propagate_on_container_swap::value
|| __is_nothrow_swappable<__node_allocator>::value)
)
Enable and fix warnings during the build. Although CMake adds warning flags, they are ignored in the libc++ headers because the headers '#pragma system header' themselves. This patch disables the system header pragma when building libc++ and fixes the warnings that arose. The warnings fixed were: 1. <memory> - anonymous structs are a GNU extension 2. <functional> - anonymous structs are a GNU extension. 3. <__hash_table> - Embedded preprocessor directives have undefined behavior. 4. <string> - Definition is missing noexcept from declaration. 5. <__std_stream> - Unused variable. llvm-svn: 242623
2015-07-19 04:40:46 +08:00
#else
_NOEXCEPT_(__is_nothrow_swappable<hasher>::value && __is_nothrow_swappable<key_equal>::value)
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
{
{
__node_pointer_pointer __npp = __bucket_list_.release();
__bucket_list_.reset(__u.__bucket_list_.release());
__u.__bucket_list_.reset(__npp);
}
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
_VSTD::swap(__bucket_list_.get_deleter().size(), __u.__bucket_list_.get_deleter().size());
Implement the first part of N4258: 'Cleaning up noexcept in the Library'. This patch deals with swapping containers, and implements a more strict noexcept specification (a conforming extension) than the standard mandates. llvm-svn: 242056
2015-07-14 04:04:56 +08:00
__swap_allocator(__bucket_list_.get_deleter().__alloc(),
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__u.__bucket_list_.get_deleter().__alloc());
Implement the first part of N4258: 'Cleaning up noexcept in the Library'. This patch deals with swapping containers, and implements a more strict noexcept specification (a conforming extension) than the standard mandates. llvm-svn: 242056
2015-07-14 04:04:56 +08:00
__swap_allocator(__node_alloc(), __u.__node_alloc());
_STD -> _VSTD to avoid macro clash on windows llvm-svn: 134190
2011-07-01 05:18:19 +08:00
_VSTD::swap(__p1_.first().__next_, __u.__p1_.first().__next_);
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__p2_.swap(__u.__p2_);
__p3_.swap(__u.__p3_);
if (size() > 0)
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__bucket_list_[__constrain_hash(__p1_.first().__next_->__hash_, bucket_count())] =
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
if (__u.size() > 0)
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__u.__bucket_list_[__constrain_hash(__u.__p1_.first().__next_->__hash_, __u.bucket_count())] =
Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. llvm-svn: 184635
2013-06-22 23:21:29 +08:00
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__u.__p1_.first()));
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->swap(this, &__u);
#endif
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::bucket_size(size_type __n) const
{
Debug mode for unordered_multiset. The exercise spotted a few places I had missed on unordered_set, so I picked those up as well. There are actually two debug modes: 1. -D_LIBCPP_DEBUG2 or -D_LIBCPP_DEBUG2=1 This is a relatively expensive debug mode, but very thorough. This is normally what you want to debug with, but may turn O(1) operations into O(N) operations. 2. -D_LIBCPP_DEBUG2=0 This is "debug lite." Only preconditions that can be checked with O(1) expense are checked. For example range checking on an indexing operation. But not iterator validity. llvm-svn: 187369
2013-07-30 03:05:47 +08:00
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::bucket_size(n) called with n >= bucket_count()");
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__node_const_pointer __np = __bucket_list_[__n];
size_type __bc = bucket_count();
size_type __r = 0;
if (__np != nullptr)
{
for (__np = __np->__next_; __np != nullptr &&
This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. llvm-svn: 159836
2012-07-07 01:31:14 +08:00
__constrain_hash(__np->__hash_, __bc) == __n;
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
__np = __np->__next_, ++__r)
;
}
return __r;
}
noexcept for <unordered_map>. llvm-svn: 132646
2011-06-05 02:54:24 +08:00
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(__hash_table<_Tp, _Hash, _Equal, _Alloc>& __x,
__hash_table<_Tp, _Hash, _Equal, _Alloc>& __y)
_NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
{
__x.swap(__y);
}
Debug mode for unordered_set. I believe this to be fairly complete for unordered_set, however it is not complete yet for unordered_multiset, unordered_map or unordered_multimap. There has been a lot of work done for these other three containers, however that work was done just to keep all of the tests passing. You can try this out with -D_LIBCPP_DEBUG2. You will have to link to a libc++.dylib that has been compiled with src/debug.cpp. So far, vector (but not vector<bool>), list, and unordered_set are treated. I hope to get the other three unordered containers up fairly quickly now that unordered_set is done. The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but not today. This is my second effort at getting debug mode going for libc++, and I'm not quite yet ready to throw all of the work under the first attempt away. The basic design is that all of the debug information is kept in a central database, instead of in the containers. This has been done as an attempt to have debug mode and non-debug mode be ABI compatible with each other. There are some circumstances where if you construct a container in an environment without debug mode and pass it into debug mode, the checking will get confused and let you know with a readable error message. Passing containers the other way: from debug mode out to a non-debugging mode container should be 100% safe (at least that is the goal). llvm-svn: 186991
2013-07-24 06:01:58 +08:00
#if _LIBCPP_DEBUG_LEVEL >= 2
template <class _Tp, class _Hash, class _Equal, class _Alloc>
bool
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__dereferenceable(const const_iterator* __i) const
{
return __i->__node_ != nullptr;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
bool
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__decrementable(const const_iterator*) const
{
return false;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
bool
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__addable(const const_iterator*, ptrdiff_t) const
{
return false;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
bool
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__subscriptable(const const_iterator*, ptrdiff_t) const
{
return false;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
libcxx initial import llvm-svn: 103490
2010-05-12 03:42:16 +08:00
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP__HASH_TABLE