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// -*- C++ -*-
//===---------------------------- system_error ----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_SYSTEM_ERROR
#define _LIBCPP_SYSTEM_ERROR
/*
system_error synopsis
namespace std
{
class error_category
{
public:
virtual ~error_category() noexcept;
constexpr error_category();
error_category(const error_category&) = delete;
error_category& operator=(const error_category&) = delete;
virtual const char* name() const noexcept = 0;
virtual error_condition default_error_condition(int ev) const noexcept;
virtual bool equivalent(int code, const error_condition& condition) const noexcept;
virtual bool equivalent(const error_code& code, int condition) const noexcept;
virtual string message(int ev) const = 0;
bool operator==(const error_category& rhs) const noexcept;
bool operator!=(const error_category& rhs) const noexcept;
bool operator<(const error_category& rhs) const noexcept;
};
const error_category& generic_category() noexcept;
const error_category& system_category() noexcept;
template <class T> struct is_error_code_enum
: public false_type {};
template <class T> struct is_error_condition_enum
: public false_type {};
template <class _Tp>
constexpr size_t is_error_condition_enum_v = is_error_condition_enum<_Tp>::value; // C++17
template <class _Tp>
constexpr size_t is_error_code_enum_v = is_error_code_enum<_Tp>::value; // C++17
class error_code
{
public:
// constructors:
error_code() noexcept;
error_code(int val, const error_category& cat) noexcept;
template <class ErrorCodeEnum>
error_code(ErrorCodeEnum e) noexcept;
// modifiers:
void assign(int val, const error_category& cat) noexcept;
template <class ErrorCodeEnum>
error_code& operator=(ErrorCodeEnum e) noexcept;
void clear() noexcept;
// observers:
int value() const noexcept;
const error_category& category() const noexcept;
error_condition default_error_condition() const noexcept;
string message() const;
explicit operator bool() const noexcept;
};
// non-member functions:
bool operator<(const error_code& lhs, const error_code& rhs) noexcept;
template <class charT, class traits>
basic_ostream<charT,traits>&
operator<<(basic_ostream<charT,traits>& os, const error_code& ec);
class error_condition
{
public:
// constructors:
error_condition() noexcept;
error_condition(int val, const error_category& cat) noexcept;
template <class ErrorConditionEnum>
error_condition(ErrorConditionEnum e) noexcept;
// modifiers:
void assign(int val, const error_category& cat) noexcept;
template <class ErrorConditionEnum>
error_condition& operator=(ErrorConditionEnum e) noexcept;
void clear() noexcept;
// observers:
int value() const noexcept;
const error_category& category() const noexcept;
string message() const noexcept;
explicit operator bool() const noexcept;
};
bool operator<(const error_condition& lhs, const error_condition& rhs) noexcept;
class system_error
: public runtime_error
{
public:
system_error(error_code ec, const string& what_arg);
system_error(error_code ec, const char* what_arg);
system_error(error_code ec);
system_error(int ev, const error_category& ecat, const string& what_arg);
system_error(int ev, const error_category& ecat, const char* what_arg);
system_error(int ev, const error_category& ecat);
const error_code& code() const noexcept;
const char* what() const noexcept;
};
enum class errc
{
address_family_not_supported, // EAFNOSUPPORT
address_in_use, // EADDRINUSE
address_not_available, // EADDRNOTAVAIL
already_connected, // EISCONN
argument_list_too_long, // E2BIG
argument_out_of_domain, // EDOM
bad_address, // EFAULT
bad_file_descriptor, // EBADF
bad_message, // EBADMSG
broken_pipe, // EPIPE
connection_aborted, // ECONNABORTED
connection_already_in_progress, // EALREADY
connection_refused, // ECONNREFUSED
connection_reset, // ECONNRESET
cross_device_link, // EXDEV
destination_address_required, // EDESTADDRREQ
device_or_resource_busy, // EBUSY
directory_not_empty, // ENOTEMPTY
executable_format_error, // ENOEXEC
file_exists, // EEXIST
file_too_large, // EFBIG
filename_too_long, // ENAMETOOLONG
function_not_supported, // ENOSYS
host_unreachable, // EHOSTUNREACH
identifier_removed, // EIDRM
illegal_byte_sequence, // EILSEQ
inappropriate_io_control_operation, // ENOTTY
interrupted, // EINTR
invalid_argument, // EINVAL
invalid_seek, // ESPIPE
io_error, // EIO
is_a_directory, // EISDIR
message_size, // EMSGSIZE
network_down, // ENETDOWN
network_reset, // ENETRESET
network_unreachable, // ENETUNREACH
no_buffer_space, // ENOBUFS
no_child_process, // ECHILD
no_link, // ENOLINK
no_lock_available, // ENOLCK
no_message_available, // ENODATA
no_message, // ENOMSG
no_protocol_option, // ENOPROTOOPT
no_space_on_device, // ENOSPC
no_stream_resources, // ENOSR
no_such_device_or_address, // ENXIO
no_such_device, // ENODEV
no_such_file_or_directory, // ENOENT
no_such_process, // ESRCH
not_a_directory, // ENOTDIR
not_a_socket, // ENOTSOCK
not_a_stream, // ENOSTR
not_connected, // ENOTCONN
not_enough_memory, // ENOMEM
not_supported, // ENOTSUP
operation_canceled, // ECANCELED
operation_in_progress, // EINPROGRESS
operation_not_permitted, // EPERM
operation_not_supported, // EOPNOTSUPP
operation_would_block, // EWOULDBLOCK
owner_dead, // EOWNERDEAD
permission_denied, // EACCES
protocol_error, // EPROTO
protocol_not_supported, // EPROTONOSUPPORT
read_only_file_system, // EROFS
resource_deadlock_would_occur, // EDEADLK
resource_unavailable_try_again, // EAGAIN
result_out_of_range, // ERANGE
state_not_recoverable, // ENOTRECOVERABLE
stream_timeout, // ETIME
text_file_busy, // ETXTBSY
timed_out, // ETIMEDOUT
too_many_files_open_in_system, // ENFILE
too_many_files_open, // EMFILE
too_many_links, // EMLINK
too_many_symbolic_link_levels, // ELOOP
value_too_large, // EOVERFLOW
wrong_protocol_type // EPROTOTYPE
};
template <> struct is_error_condition_enum<errc>
: true_type { }
error_code make_error_code(errc e) noexcept;
error_condition make_error_condition(errc e) noexcept;
// Comparison operators:
bool operator==(const error_code& lhs, const error_code& rhs) noexcept;
bool operator==(const error_code& lhs, const error_condition& rhs) noexcept;
bool operator==(const error_condition& lhs, const error_code& rhs) noexcept;
bool operator==(const error_condition& lhs, const error_condition& rhs) noexcept;
bool operator!=(const error_code& lhs, const error_code& rhs) noexcept;
bool operator!=(const error_code& lhs, const error_condition& rhs) noexcept;
bool operator!=(const error_condition& lhs, const error_code& rhs) noexcept;
bool operator!=(const error_condition& lhs, const error_condition& rhs) noexcept;
template <> struct hash<std::error_code>;
template <> struct hash<std::error_condition>;
} // std
*/
#include <__config>
#include <cerrno>
#include <type_traits>
#include <stdexcept>
#include <__functional_base>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
// is_error_code_enum
template <class _Tp>
struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum
: public false_type {};
#if _LIBCPP_STD_VER > 14
template <class _Tp>
constexpr size_t is_error_code_enum_v = is_error_code_enum<_Tp>::value;
#endif
// is_error_condition_enum
template <class _Tp>
struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum
: public false_type {};
#if _LIBCPP_STD_VER > 14
template <class _Tp>
constexpr size_t is_error_condition_enum_v = is_error_condition_enum<_Tp>::value;
#endif
// Some error codes are not present on all platforms, so we provide equivalents
// for them:
//enum class errc
_LIBCPP_DECLARE_STRONG_ENUM(errc)
{
address_family_not_supported = EAFNOSUPPORT,
address_in_use = EADDRINUSE,
address_not_available = EADDRNOTAVAIL,
already_connected = EISCONN,
argument_list_too_long = E2BIG,
argument_out_of_domain = EDOM,
bad_address = EFAULT,
bad_file_descriptor = EBADF,
bad_message = EBADMSG,
broken_pipe = EPIPE,
connection_aborted = ECONNABORTED,
connection_already_in_progress = EALREADY,
connection_refused = ECONNREFUSED,
connection_reset = ECONNRESET,
cross_device_link = EXDEV,
destination_address_required = EDESTADDRREQ,
device_or_resource_busy = EBUSY,
directory_not_empty = ENOTEMPTY,
executable_format_error = ENOEXEC,
file_exists = EEXIST,
file_too_large = EFBIG,
filename_too_long = ENAMETOOLONG,
function_not_supported = ENOSYS,
host_unreachable = EHOSTUNREACH,
identifier_removed = EIDRM,
illegal_byte_sequence = EILSEQ,
inappropriate_io_control_operation = ENOTTY,
interrupted = EINTR,
invalid_argument = EINVAL,
invalid_seek = ESPIPE,
io_error = EIO,
is_a_directory = EISDIR,
message_size = EMSGSIZE,
network_down = ENETDOWN,
network_reset = ENETRESET,
network_unreachable = ENETUNREACH,
no_buffer_space = ENOBUFS,
no_child_process = ECHILD,
no_link = ENOLINK,
no_lock_available = ENOLCK,
#ifdef ENODATA
no_message_available = ENODATA,
#else
no_message_available = ENOMSG,
#endif
no_message = ENOMSG,
no_protocol_option = ENOPROTOOPT,
no_space_on_device = ENOSPC,
#ifdef ENOSR
no_stream_resources = ENOSR,
#else
no_stream_resources = ENOMEM,
#endif
no_such_device_or_address = ENXIO,
no_such_device = ENODEV,
no_such_file_or_directory = ENOENT,
no_such_process = ESRCH,
not_a_directory = ENOTDIR,
not_a_socket = ENOTSOCK,
#ifdef ENOSTR
not_a_stream = ENOSTR,
#else
not_a_stream = EINVAL,
#endif
not_connected = ENOTCONN,
not_enough_memory = ENOMEM,
not_supported = ENOTSUP,
operation_canceled = ECANCELED,
operation_in_progress = EINPROGRESS,
operation_not_permitted = EPERM,
operation_not_supported = EOPNOTSUPP,
operation_would_block = EWOULDBLOCK,
owner_dead = EOWNERDEAD,
permission_denied = EACCES,
protocol_error = EPROTO,
protocol_not_supported = EPROTONOSUPPORT,
read_only_file_system = EROFS,
resource_deadlock_would_occur = EDEADLK,
resource_unavailable_try_again = EAGAIN,
result_out_of_range = ERANGE,
state_not_recoverable = ENOTRECOVERABLE,
#ifdef ETIME
stream_timeout = ETIME,
#else
stream_timeout = ETIMEDOUT,
#endif
text_file_busy = ETXTBSY,
timed_out = ETIMEDOUT,
too_many_files_open_in_system = ENFILE,
too_many_files_open = EMFILE,
too_many_links = EMLINK,
too_many_symbolic_link_levels = ELOOP,
value_too_large = EOVERFLOW,
wrong_protocol_type = EPROTOTYPE
};
_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(errc)
template <>
struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum<errc>
: true_type { };
#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
template <>
struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum<errc::__lx>
: true_type { };
#endif
class _LIBCPP_TYPE_VIS error_condition;
class _LIBCPP_TYPE_VIS error_code;
// class error_category
class _LIBCPP_HIDDEN __do_message;
class _LIBCPP_TYPE_VIS error_category
{
public:
virtual ~error_category() _NOEXCEPT;
#ifdef _LIBCPP_BUILDING_SYSTEM_ERROR
error_category() _NOEXCEPT;
#else
_LIBCPP_ALWAYS_INLINE
_LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT _LIBCPP_DEFAULT
#endif
private:
error_category(const error_category&);// = delete;
error_category& operator=(const error_category&);// = delete;
public:
virtual const char* name() const _NOEXCEPT = 0;
virtual error_condition default_error_condition(int __ev) const _NOEXCEPT;
virtual bool equivalent(int __code, const error_condition& __condition) const _NOEXCEPT;
virtual bool equivalent(const error_code& __code, int __condition) const _NOEXCEPT;
virtual string message(int __ev) const = 0;
_LIBCPP_ALWAYS_INLINE
bool operator==(const error_category& __rhs) const _NOEXCEPT {return this == &__rhs;}
_LIBCPP_ALWAYS_INLINE
bool operator!=(const error_category& __rhs) const _NOEXCEPT {return !(*this == __rhs);}
_LIBCPP_ALWAYS_INLINE
bool operator< (const error_category& __rhs) const _NOEXCEPT {return this < &__rhs;}
friend class _LIBCPP_HIDDEN __do_message;
};
class _LIBCPP_HIDDEN __do_message
: public error_category
{
public:
virtual string message(int ev) const;
};
_LIBCPP_FUNC_VIS const error_category& generic_category() _NOEXCEPT;
_LIBCPP_FUNC_VIS const error_category& system_category() _NOEXCEPT;
class _LIBCPP_TYPE_VIS error_condition
{
int __val_;
const error_category* __cat_;
public:
_LIBCPP_ALWAYS_INLINE
error_condition() _NOEXCEPT : __val_(0), __cat_(&generic_category()) {}
_LIBCPP_ALWAYS_INLINE
error_condition(int __val, const error_category& __cat) _NOEXCEPT
: __val_(__val), __cat_(&__cat) {}
template <class _Ep>
_LIBCPP_ALWAYS_INLINE
error_condition(_Ep __e,
typename enable_if<is_error_condition_enum<_Ep>::value>::type* = 0
) _NOEXCEPT
{*this = make_error_condition(__e);}
_LIBCPP_ALWAYS_INLINE
void assign(int __val, const error_category& __cat) _NOEXCEPT
{
__val_ = __val;
__cat_ = &__cat;
}
template <class _Ep>
_LIBCPP_ALWAYS_INLINE
typename enable_if
<
is_error_condition_enum<_Ep>::value,
error_condition&
>::type
operator=(_Ep __e) _NOEXCEPT
{*this = make_error_condition(__e); return *this;}
_LIBCPP_ALWAYS_INLINE
void clear() _NOEXCEPT
{
__val_ = 0;
__cat_ = &generic_category();
}
_LIBCPP_ALWAYS_INLINE
int value() const _NOEXCEPT {return __val_;}
_LIBCPP_ALWAYS_INLINE
const error_category& category() const _NOEXCEPT {return *__cat_;}
string message() const;
_LIBCPP_ALWAYS_INLINE
_LIBCPP_EXPLICIT
operator bool() const _NOEXCEPT {return __val_ != 0;}
};
inline _LIBCPP_INLINE_VISIBILITY
error_condition
make_error_condition(errc __e) _NOEXCEPT
{
return error_condition(static_cast<int>(__e), generic_category());
}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator<(const error_condition& __x, const error_condition& __y) _NOEXCEPT
{
return __x.category() < __y.category()
|| (__x.category() == __y.category() && __x.value() < __y.value());
}
// error_code
class _LIBCPP_TYPE_VIS error_code
{
int __val_;
const error_category* __cat_;
public:
_LIBCPP_ALWAYS_INLINE
error_code() _NOEXCEPT : __val_(0), __cat_(&system_category()) {}
_LIBCPP_ALWAYS_INLINE
error_code(int __val, const error_category& __cat) _NOEXCEPT
: __val_(__val), __cat_(&__cat) {}
template <class _Ep>
_LIBCPP_ALWAYS_INLINE
error_code(_Ep __e,
typename enable_if<is_error_code_enum<_Ep>::value>::type* = 0
) _NOEXCEPT
{*this = make_error_code(__e);}
_LIBCPP_ALWAYS_INLINE
void assign(int __val, const error_category& __cat) _NOEXCEPT
{
__val_ = __val;
__cat_ = &__cat;
}
template <class _Ep>
_LIBCPP_ALWAYS_INLINE
typename enable_if
<
is_error_code_enum<_Ep>::value,
error_code&
>::type
operator=(_Ep __e) _NOEXCEPT
{*this = make_error_code(__e); return *this;}
_LIBCPP_ALWAYS_INLINE
void clear() _NOEXCEPT
{
__val_ = 0;
__cat_ = &system_category();
}
_LIBCPP_ALWAYS_INLINE
int value() const _NOEXCEPT {return __val_;}
_LIBCPP_ALWAYS_INLINE
const error_category& category() const _NOEXCEPT {return *__cat_;}
_LIBCPP_ALWAYS_INLINE
error_condition default_error_condition() const _NOEXCEPT
{return __cat_->default_error_condition(__val_);}
string message() const;
_LIBCPP_ALWAYS_INLINE
_LIBCPP_EXPLICIT
operator bool() const _NOEXCEPT {return __val_ != 0;}
};
inline _LIBCPP_INLINE_VISIBILITY
error_code
make_error_code(errc __e) _NOEXCEPT
{
return error_code(static_cast<int>(__e), generic_category());
}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator<(const error_code& __x, const error_code& __y) _NOEXCEPT
{
return __x.category() < __y.category()
|| (__x.category() == __y.category() && __x.value() < __y.value());
}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator==(const error_code& __x, const error_code& __y) _NOEXCEPT
{
return __x.category() == __y.category() && __x.value() == __y.value();
}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator==(const error_code& __x, const error_condition& __y) _NOEXCEPT
{
return __x.category().equivalent(__x.value(), __y)
|| __y.category().equivalent(__x, __y.value());
}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator==(const error_condition& __x, const error_code& __y) _NOEXCEPT
{
return __y == __x;
}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator==(const error_condition& __x, const error_condition& __y) _NOEXCEPT
{
return __x.category() == __y.category() && __x.value() == __y.value();
}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator!=(const error_code& __x, const error_code& __y) _NOEXCEPT
{return !(__x == __y);}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator!=(const error_code& __x, const error_condition& __y) _NOEXCEPT
{return !(__x == __y);}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator!=(const error_condition& __x, const error_code& __y) _NOEXCEPT
{return !(__x == __y);}
inline _LIBCPP_INLINE_VISIBILITY
bool
operator!=(const error_condition& __x, const error_condition& __y) _NOEXCEPT
{return !(__x == __y);}
template <>
struct _LIBCPP_TYPE_VIS_ONLY hash<error_code>
: public unary_function<error_code, size_t>
{
_LIBCPP_INLINE_VISIBILITY
size_t operator()(const error_code& __ec) const _NOEXCEPT
{
return static_cast<size_t>(__ec.value());
}
};
template <>
struct _LIBCPP_TYPE_VIS_ONLY hash<error_condition>
: public unary_function<error_condition, size_t>
{
_LIBCPP_INLINE_VISIBILITY
size_t operator()(const error_condition& __ec) const _NOEXCEPT
{
return static_cast<size_t>(__ec.value());
}
};
// system_error
class _LIBCPP_TYPE_VIS system_error
: public runtime_error
{
error_code __ec_;
public:
system_error(error_code __ec, const string& __what_arg);
system_error(error_code __ec, const char* __what_arg);
system_error(error_code __ec);
system_error(int __ev, const error_category& __ecat, const string& __what_arg);
system_error(int __ev, const error_category& __ecat, const char* __what_arg);
system_error(int __ev, const error_category& __ecat);
~system_error() _NOEXCEPT;
_LIBCPP_ALWAYS_INLINE
const error_code& code() const _NOEXCEPT {return __ec_;}
private:
static string __init(const error_code&, string);
};
_LIBCPP_NORETURN _LIBCPP_FUNC_VIS
void __throw_system_error(int ev, const char* what_arg);
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_SYSTEM_ERROR
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