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algorithm	file	3,385 B	0644	2026-02-26 00:00:00	edit
any	file	19,155 B	0644	2026-02-26 00:00:00	edit
array	file	15,765 B	0644	2026-02-26 00:00:00	edit
atomic	file	52,386 B	0644	2026-02-26 00:00:00	edit
barrier	file	8,055 B	0644	2026-02-26 00:00:00	edit
bit	file	14,341 B	0644	2026-02-26 00:00:00	edit
bitset	file	50,370 B	0644	2026-02-26 00:00:00	edit
cassert	file	1,648 B	0644	2026-02-26 00:00:00	edit
ccomplex	file	1,335 B	0644	2026-02-26 00:00:00	edit
cctype	file	2,401 B	0644	2026-02-26 00:00:00	edit
cerrno	file	1,770 B	0644	2026-02-26 00:00:00	edit
cfenv	file	2,043 B	0644	2026-02-26 00:00:00	edit
cfloat	file	1,889 B	0644	2026-02-26 00:00:00	edit
charconv	file	29,830 B	0644	2026-02-26 00:00:00	edit
chrono	file	96,713 B	0644	2026-02-26 00:00:00	edit
cinttypes	file	2,145 B	0644	2026-02-26 00:00:00	edit
ciso646	file	1,464 B	0644	2026-02-26 00:00:00	edit
climits	file	1,913 B	0644	2026-02-26 00:00:00	edit
clocale	file	1,905 B	0644	2026-02-26 00:00:00	edit
cmath	file	97,153 B	0644	2026-02-26 00:00:00	edit
codecvt	file	5,275 B	0644	2026-02-26 00:00:00	edit
compare	file	38,139 B	0644	2026-02-26 00:00:00	edit
complex	file	76,638 B	0644	2026-02-26 00:00:00	edit
complex.h	file	1,596 B	0644	2026-02-26 00:00:00	edit
concepts	file	13,024 B	0644	2026-02-26 00:00:00	edit
condition_variable	file	12,895 B	0644	2026-02-26 00:00:00	edit
coroutine	file	9,614 B	0644	2026-02-26 00:00:00	edit
csetjmp	file	1,949 B	0644	2026-02-26 00:00:00	edit
csignal	file	1,855 B	0644	2026-02-26 00:00:00	edit
cstdalign	file	1,407 B	0644	2026-02-26 00:00:00	edit
cstdarg	file	1,868 B	0644	2026-02-26 00:00:00	edit
cstdbool	file	1,401 B	0644	2026-02-26 00:00:00	edit
cstddef	file	6,696 B	0644	2026-02-26 00:00:00	edit
cstdint	file	3,841 B	0644	2026-02-26 00:00:00	edit
cstdio	file	4,439 B	0644	2026-02-26 00:00:00	edit
cstdlib	file	6,918 B	0644	2026-02-26 00:00:00	edit
cstring	file	3,251 B	0644	2026-02-26 00:00:00	edit
ctgmath	file	1,360 B	0644	2026-02-26 00:00:00	edit
ctime	file	2,298 B	0644	2026-02-26 00:00:00	edit
cuchar	file	2,904 B	0644	2026-02-26 00:00:00	edit
cwchar	file	6,542 B	0644	2026-02-26 00:00:00	edit
cwctype	file	2,793 B	0644	2026-02-26 00:00:00	edit
cxxabi.h	file	22,290 B	0644	2026-02-26 00:00:00	edit
deque	file	4,667 B	0644	2026-02-26 00:00:00	edit
exception	file	5,437 B	0644	2026-02-26 00:00:00	edit
execution	file	1,918 B	0644	2026-02-26 00:00:00	edit
expected	file	52,371 B	0644	2026-02-26 00:00:00	edit
fenv.h	file	2,012 B	0644	2026-02-26 00:00:00	edit
filesystem	file	1,762 B	0644	2026-02-26 00:00:00	edit
format	file	132,026 B	0644	2026-02-26 00:00:00	edit
forward_list	file	3,030 B	0644	2026-02-26 00:00:00	edit
fstream	file	42,580 B	0644	2026-02-26 00:00:00	edit
functional	file	48,445 B	0644	2026-02-26 00:00:00	edit
future	file	53,559 B	0644	2026-02-26 00:00:00	edit
generator	file	22,693 B	0644	2026-02-26 00:00:00	edit
initializer_list	file	3,001 B	0644	2026-02-26 00:00:00	edit
iomanip	file	16,791 B	0644	2026-02-26 00:00:00	edit
ios	file	1,713 B	0644	2026-02-26 00:00:00	edit
iosfwd	file	8,406 B	0644	2026-02-26 00:00:00	edit
iostream	file	3,094 B	0644	2026-02-26 00:00:00	edit
istream	file	36,477 B	0644	2026-02-26 00:00:00	edit
iterator	file	3,093 B	0644	2026-02-26 00:00:00	edit
latch	file	2,765 B	0644	2026-02-26 00:00:00	edit
limits	file	83,976 B	0644	2026-02-26 00:00:00	edit
list	file	4,006 B	0644	2026-02-26 00:00:00	edit
locale	file	1,534 B	0644	2026-02-26 00:00:00	edit
map	file	4,471 B	0644	2026-02-26 00:00:00	edit
math.h	file	4,577 B	0644	2026-02-26 00:00:00	edit
memory	file	5,430 B	0644	2026-02-26 00:00:00	edit
memory_resource	file	14,491 B	0644	2026-02-26 00:00:00	edit
mutex	file	27,611 B	0644	2026-02-26 00:00:00	edit
new	file	8,686 B	0644	2026-02-26 00:00:00	edit
numbers	file	7,076 B	0644	2026-02-26 00:00:00	edit
numeric	file	26,220 B	0644	2026-02-26 00:00:00	edit
optional	file	45,160 B	0644	2026-02-26 00:00:00	edit
ostream	file	31,277 B	0644	2026-02-26 00:00:00	edit
print	file	4,844 B	0644	2026-02-26 00:00:00	edit
queue	file	2,600 B	0644	2026-02-26 00:00:00	edit
random	file	1,674 B	0644	2026-02-26 00:00:00	edit
ranges	file	278,497 B	0644	2026-02-26 00:00:00	edit
ratio	file	22,795 B	0644	2026-02-26 00:00:00	edit
regex	file	3,232 B	0644	2026-02-26 00:00:00	edit
scoped_allocator	file	17,824 B	0644	2026-02-26 00:00:00	edit
semaphore	file	3,108 B	0644	2026-02-26 00:00:00	edit
set	file	4,258 B	0644	2026-02-26 00:00:00	edit
shared_mutex	file	25,186 B	0644	2026-02-26 00:00:00	edit
source_location	file	2,761 B	0644	2026-02-26 00:00:00	edit
span	file	14,462 B	0644	2026-02-26 00:00:00	edit
spanstream	file	12,492 B	0644	2026-02-26 00:00:00	edit
sstream	file	39,767 B	0644	2026-02-26 00:00:00	edit
stack	file	2,524 B	0644	2026-02-26 00:00:00	edit
stacktrace	file	21,721 B	0644	2026-02-26 00:00:00	edit
stdatomic.h	file	4,116 B	0644	2026-02-26 00:00:00	edit
stdexcept	file	9,878 B	0644	2026-02-26 00:00:00	edit
stdfloat	file	1,766 B	0644	2026-02-26 00:00:00	edit
stdlib.h	file	2,305 B	0644	2026-02-26 00:00:00	edit
stop_token	file	16,098 B	0644	2026-02-26 00:00:00	edit
streambuf	file	29,938 B	0644	2026-02-26 00:00:00	edit
string	file	4,331 B	0644	2026-02-26 00:00:00	edit
string_view	file	28,180 B	0644	2026-02-26 00:00:00	edit
syncstream	file	8,378 B	0644	2026-02-26 00:00:00	edit
system_error	file	18,387 B	0644	2026-02-26 00:00:00	edit
text_encoding	file	16,655 B	0644	2026-02-26 00:00:00	edit
tgmath.h	file	1,360 B	0644	2026-02-26 00:00:00	edit
thread	file	10,005 B	0644	2026-02-26 00:00:00	edit
tuple	file	102,167 B	0644	2026-02-26 00:00:00	edit
type_traits	file	120,983 B	0644	2026-02-26 00:00:00	edit
typeindex	file	3,512 B	0644	2026-02-26 00:00:00	edit
typeinfo	file	8,290 B	0644	2026-02-26 00:00:00	edit
unordered_map	file	3,780 B	0644	2026-02-26 00:00:00	edit
unordered_set	file	3,561 B	0644	2026-02-26 00:00:00	edit
utility	file	7,561 B	0644	2026-02-26 00:00:00	edit
valarray	file	41,169 B	0644	2026-02-26 00:00:00	edit
variant	file	66,366 B	0644	2026-02-26 00:00:00	edit
vector	file	5,095 B	0644	2026-02-26 00:00:00	edit
version	file	1,449 B	0644	2026-02-26 00:00:00	edit

editing: condition_variable

// <condition_variable> -*- C++ -*-

// Copyright (C) 2008-2024 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 include/condition_variable
 *  This is a Standard C++ Library header.
 */

#ifndef _GLIBCXX_CONDITION_VARIABLE
#define _GLIBCXX_CONDITION_VARIABLE 1

#pragma GCC system_header

#include <bits/requires_hosted.h> // threading primitive

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

#include <bits/chrono.h>
#include <bits/error_constants.h>
#include <bits/std_mutex.h>
#include <bits/unique_lock.h>
#include <bits/alloc_traits.h>
#include <bits/shared_ptr.h>
#include <bits/cxxabi_forced.h>

#if __cplusplus > 201703L
# include <stop_token>
#endif

#if defined(_GLIBCXX_HAS_GTHREADS)

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**
   * @defgroup condition_variables Condition Variables
   * @ingroup concurrency
   *
   * Classes for condition_variable support.
   * @{
   */

/// cv_status
  enum class cv_status { no_timeout, timeout };

/// condition_variable
  class condition_variable
  {
    using steady_clock = chrono::steady_clock;
    using system_clock = chrono::system_clock;
#ifdef _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT
    using __clock_t = steady_clock;
#else
    using __clock_t = system_clock;
#endif

__condvar _M_cond;

public:
    typedef __gthread_cond_t* 		native_handle_type;

condition_variable() noexcept;
    ~condition_variable() noexcept;

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

void
    notify_one() noexcept;

void
    notify_all() noexcept;

void
    wait(unique_lock<mutex>& __lock);

template<typename _Predicate>
      void
      wait(unique_lock<mutex>& __lock, _Predicate __p)
      {
	while (!__p())
	  wait(__lock);
      }

#ifdef _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT
    template<typename _Duration>
      cv_status
      wait_until(unique_lock<mutex>& __lock,
		 const chrono::time_point<steady_clock, _Duration>& __atime)
      { return __wait_until_impl(__lock, __atime); }
#endif

template<typename _Duration>
      cv_status
      wait_until(unique_lock<mutex>& __lock,
		 const chrono::time_point<system_clock, _Duration>& __atime)
      { return __wait_until_impl(__lock, __atime); }

template<typename _Clock, typename _Duration>
      cv_status
      wait_until(unique_lock<mutex>& __lock,
		 const chrono::time_point<_Clock, _Duration>& __atime)
      {
#if __cplusplus > 201703L
	static_assert(chrono::is_clock_v<_Clock>);
#endif
	using __s_dur = typename __clock_t::duration;
	const typename _Clock::time_point __c_entry = _Clock::now();
	const __clock_t::time_point __s_entry = __clock_t::now();
	const auto __delta = __atime - __c_entry;
	const auto __s_atime = __s_entry +
	  chrono::__detail::ceil<__s_dur>(__delta);

if (__wait_until_impl(__lock, __s_atime) == cv_status::no_timeout)
	  return cv_status::no_timeout;
	// We got a timeout when measured against __clock_t but
	// we need to check against the caller-supplied clock
	// to tell whether we should return a timeout.
	if (_Clock::now() < __atime)
	  return cv_status::no_timeout;
	return cv_status::timeout;
      }

template<typename _Clock, typename _Duration, typename _Predicate>
      bool
      wait_until(unique_lock<mutex>& __lock,
		 const chrono::time_point<_Clock, _Duration>& __atime,
		 _Predicate __p)
      {
	while (!__p())
	  if (wait_until(__lock, __atime) == cv_status::timeout)
	    return __p();
	return true;
      }

template<typename _Rep, typename _Period>
      cv_status
      wait_for(unique_lock<mutex>& __lock,
	       const chrono::duration<_Rep, _Period>& __rtime)
      {
	using __dur = typename steady_clock::duration;
	return wait_until(__lock,
			  steady_clock::now() +
			  chrono::__detail::ceil<__dur>(__rtime));
      }

template<typename _Rep, typename _Period, typename _Predicate>
      bool
      wait_for(unique_lock<mutex>& __lock,
	       const chrono::duration<_Rep, _Period>& __rtime,
	       _Predicate __p)
      {
	using __dur = typename steady_clock::duration;
	return wait_until(__lock,
			  steady_clock::now() +
			  chrono::__detail::ceil<__dur>(__rtime),
			  std::move(__p));
      }

native_handle_type
    native_handle()
    { return _M_cond.native_handle(); }

private:
#ifdef _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT
    template<typename _Dur>
      cv_status
      __wait_until_impl(unique_lock<mutex>& __lock,
			const chrono::time_point<steady_clock, _Dur>& __atime)
      {
	auto __s = chrono::time_point_cast<chrono::seconds>(__atime);
	auto __ns = chrono::duration_cast<chrono::nanoseconds>(__atime - __s);

__gthread_time_t __ts =
	  {
	    static_cast<std::time_t>(__s.time_since_epoch().count()),
	    static_cast<long>(__ns.count())
	  };

_M_cond.wait_until(*__lock.mutex(), CLOCK_MONOTONIC, __ts);

return (steady_clock::now() < __atime
		? cv_status::no_timeout : cv_status::timeout);
      }
#endif

template<typename _Dur>
      cv_status
      __wait_until_impl(unique_lock<mutex>& __lock,
			const chrono::time_point<system_clock, _Dur>& __atime)
      {
	auto __s = chrono::time_point_cast<chrono::seconds>(__atime);
	auto __ns = chrono::duration_cast<chrono::nanoseconds>(__atime - __s);

__gthread_time_t __ts =
	  {
	    static_cast<std::time_t>(__s.time_since_epoch().count()),
	    static_cast<long>(__ns.count())
	  };

_M_cond.wait_until(*__lock.mutex(), __ts);

return (system_clock::now() < __atime
		? cv_status::no_timeout : cv_status::timeout);
      }
  };

void
  notify_all_at_thread_exit(condition_variable&, unique_lock<mutex>);

struct __at_thread_exit_elt
  {
    __at_thread_exit_elt* _M_next;
    void (*_M_cb)(void*);
  };

_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(_V2)

/// condition_variable_any
  // Like above, but mutex is not required to have try_lock.
  class condition_variable_any
  {
#ifdef _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT
    using __clock_t = chrono::steady_clock;
#else
    using __clock_t = chrono::system_clock;
#endif
    condition_variable			_M_cond;
    shared_ptr<mutex>			_M_mutex;

// scoped unlock - unlocks in ctor, re-locks in dtor
    template<typename _Lock>
      struct _Unlock
      {
	explicit _Unlock(_Lock& __lk) : _M_lock(__lk) { __lk.unlock(); }

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
	~_Unlock() noexcept(false)
	{
	  if (uncaught_exception())
	    {
	      __try
	      { _M_lock.lock(); }
	      __catch(const __cxxabiv1::__forced_unwind&)
	      { __throw_exception_again; }
	      __catch(...)
	      { }
	    }
	  else
	    _M_lock.lock();
	}
#pragma GCC diagnostic pop

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

_Lock& _M_lock;
      };

public:
    condition_variable_any() : _M_mutex(std::make_shared<mutex>()) { }
    ~condition_variable_any() = default;

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

void
    notify_one() noexcept
    {
      lock_guard<mutex> __lock(*_M_mutex);
      _M_cond.notify_one();
    }

void
    notify_all() noexcept
    {
      lock_guard<mutex> __lock(*_M_mutex);
      _M_cond.notify_all();
    }

template<typename _Lock>
      void
      wait(_Lock& __lock)
      {
	shared_ptr<mutex> __mutex = _M_mutex;
	unique_lock<mutex> __my_lock(*__mutex);
	_Unlock<_Lock> __unlock(__lock);
	// *__mutex must be unlocked before re-locking __lock so move
	// ownership of *__mutex lock to an object with shorter lifetime.
	unique_lock<mutex> __my_lock2(std::move(__my_lock));
	_M_cond.wait(__my_lock2);
      }

template<typename _Lock, typename _Predicate>
      void
      wait(_Lock& __lock, _Predicate __p)
      {
	while (!__p())
	  wait(__lock);
      }

template<typename _Lock, typename _Clock, typename _Duration>
      cv_status
      wait_until(_Lock& __lock,
		 const chrono::time_point<_Clock, _Duration>& __atime)
      {
	shared_ptr<mutex> __mutex = _M_mutex;
	unique_lock<mutex> __my_lock(*__mutex);
	_Unlock<_Lock> __unlock(__lock);
	// *__mutex must be unlocked before re-locking __lock so move
	// ownership of *__mutex lock to an object with shorter lifetime.
	unique_lock<mutex> __my_lock2(std::move(__my_lock));
	return _M_cond.wait_until(__my_lock2, __atime);
      }

template<typename _Lock, typename _Clock,
	     typename _Duration, typename _Predicate>
      bool
      wait_until(_Lock& __lock,
		 const chrono::time_point<_Clock, _Duration>& __atime,
		 _Predicate __p)
      {
	while (!__p())
	  if (wait_until(__lock, __atime) == cv_status::timeout)
	    return __p();
	return true;
      }

template<typename _Lock, typename _Rep, typename _Period>
      cv_status
      wait_for(_Lock& __lock, const chrono::duration<_Rep, _Period>& __rtime)
      { return wait_until(__lock, __clock_t::now() + __rtime); }

template<typename _Lock, typename _Rep,
	     typename _Period, typename _Predicate>
      bool
      wait_for(_Lock& __lock,
	       const chrono::duration<_Rep, _Period>& __rtime, _Predicate __p)
      { return wait_until(__lock, __clock_t::now() + __rtime, std::move(__p)); }

#ifdef __glibcxx_jthread
    template <class _Lock, class _Predicate>
    bool wait(_Lock& __lock,
              stop_token __stoken,
              _Predicate __p)
    {
      if (__stoken.stop_requested())
        {
          return __p();
        }

std::stop_callback __cb(__stoken, [this] { notify_all(); });
      shared_ptr<mutex> __mutex = _M_mutex;
      while (!__p())
        {
          unique_lock<mutex> __my_lock(*__mutex);
          if (__stoken.stop_requested())
            {
              return false;
            }
          // *__mutex must be unlocked before re-locking __lock so move
          // ownership of *__mutex lock to an object with shorter lifetime.
          _Unlock<_Lock> __unlock(__lock);
          unique_lock<mutex> __my_lock2(std::move(__my_lock));
          _M_cond.wait(__my_lock2);
        }
      return true;
    }

template <class _Lock, class _Clock, class _Duration, class _Predicate>
    bool wait_until(_Lock& __lock,
                    stop_token __stoken,
                    const chrono::time_point<_Clock, _Duration>& __abs_time,
                    _Predicate __p)
    {
      if (__stoken.stop_requested())
        {
          return __p();
        }

std::stop_callback __cb(__stoken, [this] { notify_all(); });
      shared_ptr<mutex> __mutex = _M_mutex;
      while (!__p())
        {
          bool __stop;
          {
            unique_lock<mutex> __my_lock(*__mutex);
            if (__stoken.stop_requested())
              {
                return false;
              }
            _Unlock<_Lock> __u(__lock);
            unique_lock<mutex> __my_lock2(std::move(__my_lock));
            const auto __status = _M_cond.wait_until(__my_lock2, __abs_time);
            __stop = (__status == std::cv_status::timeout) || __stoken.stop_requested();
          }
          if (__stop)
            {
              return __p();
            }
        }
      return true;
    }

template <class _Lock, class _Rep, class _Period, class _Predicate>
    bool wait_for(_Lock& __lock,
                  stop_token __stoken,
                  const chrono::duration<_Rep, _Period>& __rel_time,
                  _Predicate __p)
    {
      auto __abst = std::chrono::steady_clock::now() + __rel_time;
      return wait_until(__lock,
                        std::move(__stoken),
                        __abst,
                        std::move(__p));
    }
#endif
  };

_GLIBCXX_END_INLINE_ABI_NAMESPACE(_V2)

/// @} group condition_variables
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif // _GLIBCXX_HAS_GTHREADS
#endif // C++11
#endif // _GLIBCXX_CONDITION_VARIABLE

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