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algorithmfwd.h	21.23 KB	-rw-r--r--
alloc_traits.h	19.6 KB	-rw-r--r--
allocated_ptr.h	3.22 KB	-rw-r--r--
allocator.h	7.39 KB	-rw-r--r--
atomic_base.h	23.28 KB	-rw-r--r--
atomic_futex.h	9.35 KB	-rw-r--r--
atomic_lockfree_defines.h	2.2 KB	-rw-r--r--
basic_ios.h	15.7 KB	-rw-r--r--
basic_ios.tcc	5.94 KB	-rw-r--r--
basic_string.h	237.01 KB	-rw-r--r--
basic_string.tcc	52.5 KB	-rw-r--r--
boost_concept_check.h	26.52 KB	-rw-r--r--
c++0x_warning.h	1.44 KB	-rw-r--r--
char_traits.h	20.42 KB	-rw-r--r--
codecvt.h	20.79 KB	-rw-r--r--
concept_check.h	3.34 KB	-rw-r--r--
cpp_type_traits.h	9.56 KB	-rw-r--r--
cxxabi_forced.h	1.77 KB	-rw-r--r--
cxxabi_init_exception.h	2.17 KB	-rw-r--r--
deque.tcc	33.32 KB	-rw-r--r--
enable_special_members.h	12.1 KB	-rw-r--r--
exception.h	2.23 KB	-rw-r--r--
exception_defines.h	1.61 KB	-rw-r--r--
exception_ptr.h	5.84 KB	-rw-r--r--
forward_list.h	47.77 KB	-rw-r--r--
forward_list.tcc	12.86 KB	-rw-r--r--
fs_dir.h	14.38 KB	-rw-r--r--
fs_fwd.h	10.04 KB	-rw-r--r--
fs_ops.h	9.5 KB	-rw-r--r--
fs_path.h	32.12 KB	-rw-r--r--
fstream.tcc	32.03 KB	-rw-r--r--
functexcept.h	3.18 KB	-rw-r--r--
functional_hash.h	8.04 KB	-rw-r--r--
gslice.h	5.39 KB	-rw-r--r--
gslice_array.h	7.59 KB	-rw-r--r--
hash_bytes.h	2.1 KB	-rw-r--r--
hashtable.h	72.06 KB	-rw-r--r--
hashtable_policy.h	66.38 KB	-rw-r--r--
indirect_array.h	7.68 KB	-rw-r--r--
invoke.h	3.57 KB	-rw-r--r--
ios_base.h	30.3 KB	-rw-r--r--
istream.tcc	30.36 KB	-rw-r--r--
list.tcc	15.6 KB	-rw-r--r--
locale_classes.h	24.31 KB	-rw-r--r--
locale_classes.tcc	8.18 KB	-rw-r--r--
locale_conv.h	15.72 KB	-rw-r--r--
locale_facets.h	90.16 KB	-rw-r--r--
locale_facets.tcc	38.62 KB	-rw-r--r--
locale_facets_nonio.h	67.36 KB	-rw-r--r--
locale_facets_nonio.tcc	44.22 KB	-rw-r--r--
localefwd.h	5.51 KB	-rw-r--r--
mask_array.h	7.42 KB	-rw-r--r--
memoryfwd.h	2.4 KB	-rw-r--r--
move.h	6.38 KB	-rw-r--r--
nested_exception.h	4.69 KB	-rw-r--r--
node_handle.h	8.02 KB	-rw-r--r--
ostream.tcc	12.03 KB	-rw-r--r--
ostream_insert.h	3.91 KB	-rw-r--r--
parse_numbers.h	7.76 KB	-rw-r--r--
postypes.h	8.02 KB	-rw-r--r--
predefined_ops.h	8.87 KB	-rw-r--r--
ptr_traits.h	6.47 KB	-rw-r--r--
quoted_string.h	4.93 KB	-rw-r--r--
random.h	171.14 KB	-rw-r--r--
random.tcc	103.12 KB	-rw-r--r--
range_access.h	9.79 KB	-rw-r--r--
refwrap.h	11.61 KB	-rw-r--r--
regex.h	95.12 KB	-rw-r--r--
regex.tcc	16.18 KB	-rw-r--r--
regex_automaton.h	10.47 KB	-rw-r--r--
regex_automaton.tcc	7.65 KB	-rw-r--r--
regex_compiler.h	17.63 KB	-rw-r--r--
regex_compiler.tcc	18.84 KB	-rw-r--r--
regex_constants.h	14.36 KB	-rw-r--r--
regex_error.h	4.79 KB	-rw-r--r--
regex_executor.h	7.31 KB	-rw-r--r--
regex_executor.tcc	18.4 KB	-rw-r--r--
regex_scanner.h	6.92 KB	-rw-r--r--
regex_scanner.tcc	14.66 KB	-rw-r--r--
shared_ptr.h	22.88 KB	-rw-r--r--
shared_ptr_atomic.h	9.54 KB	-rw-r--r--
shared_ptr_base.h	53.01 KB	-rw-r--r--
slice_array.h	9.13 KB	-rw-r--r--
specfun.h	45.95 KB	-rw-r--r--
sstream.tcc	9.9 KB	-rw-r--r--
std_abs.h	3.19 KB	-rw-r--r--
std_function.h	22.71 KB	-rw-r--r--
std_mutex.h	9.08 KB	-rw-r--r--
stl_algo.h	209.27 KB	-rw-r--r--
stl_algobase.h	49.31 KB	-rw-r--r--
stl_bvector.h	32.94 KB	-rw-r--r--
stl_construct.h	7.22 KB	-rw-r--r--
stl_deque.h	76.73 KB	-rw-r--r--
stl_function.h	40.77 KB	-rw-r--r--
stl_heap.h	19.73 KB	-rw-r--r--
stl_iterator.h	41.3 KB	-rw-r--r--
stl_iterator_base_funcs.h	7.99 KB	-rw-r--r--
stl_iterator_base_types.h	8.48 KB	-rw-r--r--
stl_list.h	65.97 KB	-rw-r--r--
stl_map.h	51.55 KB	-rw-r--r--
stl_multimap.h	40.58 KB	-rw-r--r--
stl_multiset.h	34.97 KB	-rw-r--r--
stl_numeric.h	13.51 KB	-rw-r--r--
stl_pair.h	18.21 KB	-rw-r--r--
stl_queue.h	23.51 KB	-rw-r--r--
stl_raw_storage_iter.h	3.74 KB	-rw-r--r--
stl_relops.h	4.49 KB	-rw-r--r--
stl_set.h	35.28 KB	-rw-r--r--
stl_stack.h	11.66 KB	-rw-r--r--
stl_tempbuf.h	8.15 KB	-rw-r--r--
stl_tree.h	73.15 KB	-rw-r--r--
stl_uninitialized.h	27.06 KB	-rw-r--r--
stl_vector.h	59.12 KB	-rw-r--r--
stream_iterator.h	6.5 KB	-rw-r--r--
streambuf.tcc	4.81 KB	-rw-r--r--
streambuf_iterator.h	13.44 KB	-rw-r--r--
string_view.tcc	6.54 KB	-rw-r--r--
stringfwd.h	2.55 KB	-rw-r--r--
uniform_int_dist.h	9.84 KB	-rw-r--r--
unique_ptr.h	25.38 KB	-rw-r--r--
unordered_map.h	73.58 KB	-rw-r--r--
unordered_set.h	57.76 KB	-rw-r--r--
uses_allocator.h	6.37 KB	-rw-r--r--
valarray_after.h	22.12 KB	-rw-r--r--
valarray_array.h	21.3 KB	-rw-r--r--
valarray_array.tcc	7.08 KB	-rw-r--r--
valarray_before.h	18.08 KB	-rw-r--r--
vector.tcc	28.95 KB	-rw-r--r--

Code Editor : std_mutex.h

// std::mutex implementation -*- C++ -*-

// Copyright (C) 2003-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file bits/std_mutex.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{mutex}
 */

#ifndef _GLIBCXX_MUTEX_H
#define _GLIBCXX_MUTEX_H 1

#pragma GCC system_header

#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else

#include <system_error>
#include <bits/functexcept.h>
#include <bits/gthr.h>
#include <bits/move.h> // for std::swap

#ifdef _GLIBCXX_USE_C99_STDINT_TR1

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**
   * @defgroup mutexes Mutexes
   * @ingroup concurrency
   *
   * Classes for mutex support.
   * @{
   */

#ifdef _GLIBCXX_HAS_GTHREADS
  // Common base class for std::mutex and std::timed_mutex
  class __mutex_base
  {
  protected:
    typedef __gthread_mutex_t			__native_type;

#ifdef __GTHREAD_MUTEX_INIT
    __native_type  _M_mutex = __GTHREAD_MUTEX_INIT;

constexpr __mutex_base() noexcept = default;
#else
    __native_type  _M_mutex;

__mutex_base() noexcept
    {
      // XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)
      __GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);
    }

~__mutex_base() noexcept { __gthread_mutex_destroy(&_M_mutex); }
#endif

__mutex_base(const __mutex_base&) = delete;
    __mutex_base& operator=(const __mutex_base&) = delete;
  };

/// The standard mutex type.
  class mutex : private __mutex_base
  {
  public:
    typedef __native_type* 			native_handle_type;

#ifdef __GTHREAD_MUTEX_INIT
    constexpr
#endif
    mutex() noexcept = default;
    ~mutex() = default;

mutex(const mutex&) = delete;
    mutex& operator=(const mutex&) = delete;

void
    lock()
    {
      int __e = __gthread_mutex_lock(&_M_mutex);

// EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)
      if (__e)
	__throw_system_error(__e);
    }

bool
    try_lock() noexcept
    {
      // XXX EINVAL, EAGAIN, EBUSY
      return !__gthread_mutex_trylock(&_M_mutex);
    }

void
    unlock()
    {
      // XXX EINVAL, EAGAIN, EPERM
      __gthread_mutex_unlock(&_M_mutex);
    }

native_handle_type
    native_handle() noexcept
    { return &_M_mutex; }
  };

#endif // _GLIBCXX_HAS_GTHREADS

/// Do not acquire ownership of the mutex.
  struct defer_lock_t { explicit defer_lock_t() = default; };

/// Try to acquire ownership of the mutex without blocking.
  struct try_to_lock_t { explicit try_to_lock_t() = default; };

/// Assume the calling thread has already obtained mutex ownership
  /// and manage it.
  struct adopt_lock_t { explicit adopt_lock_t() = default; };

/// Tag used to prevent a scoped lock from acquiring ownership of a mutex.
  _GLIBCXX17_INLINE constexpr defer_lock_t	defer_lock { };

/// Tag used to prevent a scoped lock from blocking if a mutex is locked.
  _GLIBCXX17_INLINE constexpr try_to_lock_t	try_to_lock { };

/// Tag used to make a scoped lock take ownership of a locked mutex.
  _GLIBCXX17_INLINE constexpr adopt_lock_t	adopt_lock { };

/** @brief A simple scoped lock type.
   *
   * A lock_guard controls mutex ownership within a scope, releasing
   * ownership in the destructor.
   */
  template<typename _Mutex>
    class lock_guard
    {
    public:
      typedef _Mutex mutex_type;

explicit lock_guard(mutex_type& __m) : _M_device(__m)
      { _M_device.lock(); }

lock_guard(mutex_type& __m, adopt_lock_t) noexcept : _M_device(__m)
      { } // calling thread owns mutex

~lock_guard()
      { _M_device.unlock(); }

lock_guard(const lock_guard&) = delete;
      lock_guard& operator=(const lock_guard&) = delete;

private:
      mutex_type&  _M_device;
    };

/** @brief A movable scoped lock type.
   *
   * A unique_lock controls mutex ownership within a scope. Ownership of the
   * mutex can be delayed until after construction and can be transferred
   * to another unique_lock by move construction or move assignment. If a
   * mutex lock is owned when the destructor runs ownership will be released.
   */
  template<typename _Mutex>
    class unique_lock
    {
    public:
      typedef _Mutex mutex_type;

unique_lock() noexcept
      : _M_device(0), _M_owns(false)
      { }

explicit unique_lock(mutex_type& __m)
      : _M_device(std::__addressof(__m)), _M_owns(false)
      {
	lock();
	_M_owns = true;
      }

unique_lock(mutex_type& __m, defer_lock_t) noexcept
      : _M_device(std::__addressof(__m)), _M_owns(false)
      { }

unique_lock(mutex_type& __m, try_to_lock_t)
      : _M_device(std::__addressof(__m)), _M_owns(_M_device->try_lock())
      { }

unique_lock(mutex_type& __m, adopt_lock_t) noexcept
      : _M_device(std::__addressof(__m)), _M_owns(true)
      {
	// XXX calling thread owns mutex
      }

template<typename _Clock, typename _Duration>
	unique_lock(mutex_type& __m,
		    const chrono::time_point<_Clock, _Duration>& __atime)
	: _M_device(std::__addressof(__m)),
	  _M_owns(_M_device->try_lock_until(__atime))
	{ }

template<typename _Rep, typename _Period>
	unique_lock(mutex_type& __m,
		    const chrono::duration<_Rep, _Period>& __rtime)
	: _M_device(std::__addressof(__m)),
	  _M_owns(_M_device->try_lock_for(__rtime))
	{ }

~unique_lock()
      {
	if (_M_owns)
	  unlock();
      }

unique_lock(const unique_lock&) = delete;
      unique_lock& operator=(const unique_lock&) = delete;

unique_lock(unique_lock&& __u) noexcept
      : _M_device(__u._M_device), _M_owns(__u._M_owns)
      {
	__u._M_device = 0;
	__u._M_owns = false;
      }

unique_lock& operator=(unique_lock&& __u) noexcept
      {
	if(_M_owns)
	  unlock();

unique_lock(std::move(__u)).swap(*this);

__u._M_device = 0;
	__u._M_owns = false;

return *this;
      }

void
      lock()
      {
	if (!_M_device)
	  __throw_system_error(int(errc::operation_not_permitted));
	else if (_M_owns)
	  __throw_system_error(int(errc::resource_deadlock_would_occur));
	else
	  {
	    _M_device->lock();
	    _M_owns = true;
	  }
      }

bool
      try_lock()
      {
	if (!_M_device)
	  __throw_system_error(int(errc::operation_not_permitted));
	else if (_M_owns)
	  __throw_system_error(int(errc::resource_deadlock_would_occur));
	else
	  {
	    _M_owns = _M_device->try_lock();
	    return _M_owns;
	  }
      }

template<typename _Clock, typename _Duration>
	bool
	try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)
	{
	  if (!_M_device)
	    __throw_system_error(int(errc::operation_not_permitted));
	  else if (_M_owns)
	    __throw_system_error(int(errc::resource_deadlock_would_occur));
	  else
	    {
	      _M_owns = _M_device->try_lock_until(__atime);
	      return _M_owns;
	    }
	}

template<typename _Rep, typename _Period>
	bool
	try_lock_for(const chrono::duration<_Rep, _Period>& __rtime)
	{
	  if (!_M_device)
	    __throw_system_error(int(errc::operation_not_permitted));
	  else if (_M_owns)
	    __throw_system_error(int(errc::resource_deadlock_would_occur));
	  else
	    {
	      _M_owns = _M_device->try_lock_for(__rtime);
	      return _M_owns;
	    }
	 }

void
      unlock()
      {
	if (!_M_owns)
	  __throw_system_error(int(errc::operation_not_permitted));
	else if (_M_device)
	  {
	    _M_device->unlock();
	    _M_owns = false;
	  }
      }

void
      swap(unique_lock& __u) noexcept
      {
	std::swap(_M_device, __u._M_device);
	std::swap(_M_owns, __u._M_owns);
      }

mutex_type*
      release() noexcept
      {
	mutex_type* __ret = _M_device;
	_M_device = 0;
	_M_owns = false;
	return __ret;
      }

bool
      owns_lock() const noexcept
      { return _M_owns; }

explicit operator bool() const noexcept
      { return owns_lock(); }

mutex_type*
      mutex() const noexcept
      { return _M_device; }

private:
      mutex_type*	_M_device;
      bool		_M_owns; // XXX use atomic_bool
    };

/// Swap overload for unique_lock objects.
  template<typename _Mutex>
    inline void
    swap(unique_lock<_Mutex>& __x, unique_lock<_Mutex>& __y) noexcept
    { __x.swap(__y); }

// @} group mutexes
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#endif // _GLIBCXX_USE_C99_STDINT_TR1

#endif // C++11

#endif // _GLIBCXX_MUTEX_H

${this.title}

Code Editor : std_mutex.h