d77851e837
Implement [util.smartptr.shared.atomic]. This is the last unimplemented
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section in libc++. This requires a recompiled dylib. Failure to rebuild
the dylib will result in a link-time error if and only if the functions from
[util.smartptr.shared.atomic] are used.
The implementation is not lock free. After considerable thought, I know of no
way to make the implementation lock free. Ideas welcome along that front. But
changing the ABI of shared_ptr is not on the table at this point.
The mutex used to lock these function is encapsulated by std::__sp_mut. The
only thing the client knows about std::__sp_mut is that it has a void* data
member, can't be constructed, and has lock and unlock members. Within the
binary __sp_mut is currently implemented as a pointer to a std::mutex. That can
change in the future without disturbing the ABI (as long as sizeof(__sp_mut)
remains constant.
I specifically did not make __sp_mut a spin lock as I have a pathological
distrust of spin locks. Testing on OS X reveals that the use of std::mutex in
this role is not a large performance penalty as long as the contention for the
mutex is low (more likely to get the lock than to have to wait). In the future
we can still make __sp_mut a spin lock if that is what is desired (without ABI
damage).
The dylib contains 16 __sp_mut's to be chosen based on the hash of the address
of the shared_ptr. The constant 16 is a ball-park reasonable space/time
tradeoff.
std::hash<T*> was changed to call __murmur2_or_cityhash, instead of the identity
function. I had thought we had already done this, but I was mistaken.
All of this is under #if __has_feature(cxx_atomic) even though the
implementation is not lock free, because the signatures require access to
std::memory_order, which is currently available only under
__has_feature(cxx_atomic).
llvm-svn: 160940
2012-07-30 01:40:57 +00:00
c0937e8add
Appy constexpr to <memory>. Picked up a few missing noexcepts as well.
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llvm-svn: 159902
2012-07-07 20:56:04 +00:00
ed81e910bd
Revert fix to http://llvm.org/bugs/show_bug.cgi?id=12867 for the reason now included in the code comment.
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llvm-svn: 157128
2012-05-19 20:20:49 +00:00
9042d623bf
Protect __shared_weak_count::__get_deleter declaration with _LIBCPP_NO_RTTI. Fixes http://llvm.org/bugs/show_bug.cgi?id=12867
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llvm-svn: 157049
2012-05-18 13:06:21 +00:00
bff1bfc6be
Greatly scale back ambitions of emulating move semantics in C++03 mode. It was causing more problems than it solved. This fixes http://llvm.org/bugs/show_bug.cgi?id=12704 .
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llvm-svn: 155918
2012-05-01 15:37:54 +00:00
f2f2d8b98d
Modernize conversion to bool to the explicit bool conversion operator (library wide). This fixes http://llvm.org/bugs/show_bug.cgi?id=12058 .
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llvm-svn: 151088
2012-02-21 21:46:43 +00:00
67f3964766
Modernize relational operators for shared_ptr and unique_ptr. This includes adding support for nullptr, and using less<T*>. Fixes http://llvm.org/bugs/show_bug.cgi?id=12056 .
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llvm-svn: 151084
2012-02-21 21:02:58 +00:00
9741d6c96e
Implement a few optimizations for vector push_back and insert. Fixes r10828365.
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llvm-svn: 150542
2012-02-15 00:41:34 +00:00
21fa1887e0
Enable full functionality of shared_ptr<const void> by adding allocator<const void>. Credit to John Hurley for discovering this bug.
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llvm-svn: 148508
2012-01-19 23:15:22 +00:00
8e25104b10
1. Fix make_shared<const T>. 2. Allow allocator<const T> as an extension. 3. Refactor work which fixed unique_ptr<const T[]>. 4. Remove no-longer-needed private declarations from unique_ptr. 5. Add constraints to some shared_ptr and weak_ptr constructors and assignment operators so that is_constructible/is_assignable give the correct answers for shared_ptr and weak_ptr. 6. Make defensive preparations in the shared_ptr free functions for the introduction of shared_ptr<T[]> in the future. 7. As an optimization, add move constructor and move assignment to weak_ptr.
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llvm-svn: 147437
2012-01-02 17:56:02 +00:00
b34b48196c
The exception recovery mechanism for the uninitialized_* algorithms did not work for iterators into discontiguous memory.
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llvm-svn: 147343
2011-12-29 17:45:35 +00:00
a87b5e3446
Fix http://llvm.org/bugs/show_bug.cgi?id=11616
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llvm-svn: 146881
2011-12-19 17:58:44 +00:00
e4097ad7e6
Allow unique_ptr<T const []> to be constructed and assigned from a unique_ptr<T[]>
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llvm-svn: 146853
2011-12-18 21:19:44 +00:00
d6f44b6601
Allow unique_ptr<T const []> to be constructed with a T* (in addition to a const T*)
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llvm-svn: 146736
2011-12-16 15:37:23 +00:00
42b8bb5033
Fix http://llvm.org/bugs/show_bug.cgi?id=11461 . Credit Alberto Ganesh Barbati.
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llvm-svn: 146345
2011-12-11 20:31:33 +00:00
53d2fb0aa2
Installation of CityHash by Craig Silverstein
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llvm-svn: 146329
2011-12-10 20:28:56 +00:00
f3d14a65ca
Starting using murmur2 when combining multiple size_t's into a single hash, and also for basic_string. Also made hash<thread::id> ever so slighly more portable. I had to tweak one test which is questionable (definitely not portable) anyway.
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llvm-svn: 145795
2011-12-05 00:08:45 +00:00
9b0cd149aa
Version #next on the hash functions for scalars. This builds on Dave's work, extends it to T*, and changes the way double and long double are handled (no longer convert to float on 32 bit). I also picked up a minor bug with uninitialized bits on the upper end of size_t when sizeof(size_t) > sizeof(T), e.g. in hash<float>. Most of the functionality has been put in one place: __scalar_hash in <memory>. Unfortunately I could not reuse __scalar_hash for hash<long double> on x86 because of the padding bits which need to be zeroed. I didn't want to add this zeroing step to the more general __scalar_hash when it isn't needed (in the absence of padding bits). I'm not ignoring the hash<string> issue (possibly changing that to a better hash). I just haven't gotten there yet.
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llvm-svn: 145778
2011-12-03 21:11:36 +00:00
c206366fd7
Quash a whole bunch of warnings
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llvm-svn: 145624
2011-12-01 20:21:04 +00:00
c003db1fca
Further macro protection by replacing _[A-Z] with _[A-Z]p
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llvm-svn: 145410
2011-11-29 18:15:50 +00:00
ab4f438239
Add protection from min/max macros
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llvm-svn: 145407
2011-11-29 16:45:27 +00:00
073458b1ab
Windows support by Ruben Van Boxem.
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llvm-svn: 142235
2011-10-17 20:05:10 +00:00
2c0a65ee78
Fix <rdar://problem/10217868>.
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llvm-svn: 140907
2011-10-01 00:26:36 +00:00
89bdcd7ef5
Configure to get along with 2.9 clang
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llvm-svn: 136526
2011-07-29 21:35:53 +00:00
e3163f5ae3
http://llvm.org/bugs/show_bug.cgi?id=10390
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llvm-svn: 135393
2011-07-18 15:51:59 +00:00
5a33687da0
Correct for new rules regarding implicitly deleted special members. http://llvm.org/bugs/show_bug.cgi?id=10191
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llvm-svn: 134248
2011-07-01 19:24:36 +00:00
ce48a1137d
_STD -> _VSTD to avoid macro clash on windows
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llvm-svn: 134190
2011-06-30 21:18:19 +00:00
64ec101eb6
Teach libc++ about the addressof() overloads it needs to work with
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Objective-C Automatic Reference Counting, where Objective-C object
pointers can have several different qualifiers (__strong, __weak,
__autoreleasing, __unsafe_unretained). These addressof() overloads are
only provided in ARC mode, and the __weak variant is conditionalized
on having weak-reference support in the ARC runtime.
For historical reasons, Clang provides these definitions itself, and
defines the macro _LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF to note when
it as done so. The code belongs here, and this redundancy will be
eliminated in the future.
Addresses <rdar://problem/9658274>.
llvm-svn: 133656
2011-06-22 22:17:44 +00:00
ce53420e37
Provide names for template and function parameters in forward declarations. The purpose is to aid automated documentation tools.
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llvm-svn: 133008
2011-06-14 19:58:17 +00:00
b58f59cdb3
Second try at getting noexcept on move and swap for deque. I changed std::alloctor to propagate_on_container_move_assignment so as to make deque<T> move assignment noexcept. What we really need is a compile-time switch that says an allocator always compares equal.
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llvm-svn: 132490
2011-06-02 21:38:57 +00:00
3739fe79e5
noexcept for <memory>. I've added a few extension noexcept to: allocator_traits<A>::deallocate, allocaate<T>::deallocate, return_temporary_buffer, and default_delete<T>::operator()(T*) const. My rationale was: If a std-dicated noexcept function needs to call another std-defined function, that called function must be noexcept. We're all a little new to noexcept, so things like this are to be expected. Also included fix for broken __is_swappable trait pointed out by Marc Glisse, thanks Marc|. And fixed a test case for is_nothrow_destructible. Destructors are now noexcept by default|
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llvm-svn: 132261
2011-05-28 14:41:13 +00:00
5eb6bdfa1d
__invokable and __invoke_of now check for incomplete types and issue a compile-time diagnostic if they are used with incomplete types for anything except a return type. Note that both arguments *and* parameters are checked for completeness.
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llvm-svn: 131818
2011-05-22 00:09:02 +00:00
f738497500
Corrected some bugs in both memory and the tests. Preparing for being able to turn on support for alias templates.
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llvm-svn: 131199
2011-05-11 20:21:19 +00:00
72c5e14203
Qualify calls to addressof with std::. Bug 9106
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llvm-svn: 124726
2011-02-02 17:36:20 +00:00
119cd0ba12
fix guard
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llvm-svn: 123269
2011-01-11 20:02:45 +00:00
f5799be4a8
Add CMake build and fix major Linux blockers.
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llvm-svn: 121510
2010-12-10 19:47:54 +00:00
ca74048398
N3142. Many of these traits are just placeholders with medium quality emulation; waiting on compiler intrinsics to do it right.
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llvm-svn: 119854
2010-11-19 22:17:28 +00:00
48d05bd26c
LWG 1339
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llvm-svn: 119699
2010-11-18 16:13:03 +00:00
a4a1ef1fc2
LWG 1404
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llvm-svn: 119609
2010-11-18 01:40:00 +00:00
412dbebe1b
license change
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llvm-svn: 119395
2010-11-16 22:09:02 +00:00
9b35c8275c
Dave Zarzycki showed how the efficiency of shared_ptr could be significantly
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increased. The following program is running 49% faster:
#include <iostream>
#include <memory>
#include <chrono>
#include <vector>
#include "chrono_io"
int main()
{
typedef std::chrono::high_resolution_clock Clock;
Clock::time_point t0 = Clock::now();
{
std::shared_ptr<int> p(new int (1));
std::vector<std::shared_ptr<int> > v(1000000, p);
v.insert(v.begin(), p);
v.insert(v.begin(), p);
v.insert(v.begin(), p);
v.insert(v.begin(), p);
}
Clock::time_point t1 = Clock::now();
std::cout << (t1-t0) << '\n';
}
llvm-svn: 119388
2010-11-16 21:33:17 +00:00
c4931c4746
I have reverted all contributions made by Jesse Towner in revision 110724
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llvm-svn: 119383
2010-11-16 21:10:23 +00:00
848a5374d0
visibility-decoration.
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llvm-svn: 114551
2010-09-22 16:48:34 +00:00
f9cca3b7d0
I am experimenting with putting visibility-default attributes on all struct/classes in libc++. This checkin decorates only basic_string and vector as an experiment, and for review by those in this audience that might know more about visibilty than I do. If I get no negative feedback on this procedure I will begin to decorate the entire library in this way.
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llvm-svn: 113590
2010-09-10 16:42:26 +00:00
7609c9b665
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.
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llvm-svn: 113086
2010-09-04 23:28:19 +00:00
b3371f6f49
Fixing whitespace problems
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llvm-svn: 111750
2010-08-22 00:02:43 +00:00
9f1102b7fe
US 108, N3109
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llvm-svn: 111747
2010-08-21 21:14:53 +00:00
20cc2a42b8
US 107
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llvm-svn: 111538
2010-08-19 18:39:17 +00:00
54b409fdb9
now works with -fno-exceptions and -fno-rtti
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llvm-svn: 110828
2010-08-11 17:04:31 +00:00
eb2692571f
patch by Jesse Towner, and bug fix by Sebastian Redl
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llvm-svn: 110724
2010-08-10 20:48:29 +00:00
Howard Hinnant