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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/std/condition_variable')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/include/std/condition_variable | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/include/std/condition_variable b/gcc-4.4.3/libstdc++-v3/include/std/condition_variable new file mode 100644 index 000000000..64f2bb771 --- /dev/null +++ b/gcc-4.4.3/libstdc++-v3/include/std/condition_variable @@ -0,0 +1,225 @@ +// <condition_variable> -*- C++ -*- + +// Copyright (C) 2008, 2009 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 condition_variable + * This is a Standard C++ Library header. + */ + +#ifndef _GLIBCXX_CONDITION_VARIABLE +#define _GLIBCXX_CONDITION_VARIABLE 1 + +#pragma GCC system_header + +#ifndef __GXX_EXPERIMENTAL_CXX0X__ +# include <c++0x_warning.h> +#else + +#include <chrono> +#include <mutex> // unique_lock + +#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) + +namespace std +{ + /** + * @defgroup condition_variables Condition Variables + * @ingroup concurrency + * + * Classes for condition_variable support. + * @{ + */ + + /// condition_variable + class condition_variable + { + typedef chrono::system_clock __clock_t; + typedef __gthread_cond_t __native_type; + __native_type _M_cond; + + public: + typedef __native_type* native_handle_type; + + condition_variable(); + ~condition_variable(); + + condition_variable(const condition_variable&) = delete; + condition_variable& operator=(const condition_variable&) = delete; + + void + notify_one(); + + void + notify_all(); + + void + wait(unique_lock<mutex>& __lock); + + template<typename _Predicate> + void + wait(unique_lock<mutex>& __lock, _Predicate __p) + { + while (!__p()) + wait(__lock); + } + + template<typename _Duration> + bool + wait_until(unique_lock<mutex>& __lock, + const chrono::time_point<__clock_t, _Duration>& __atime) + { return __wait_until_impl(__lock, __atime); } + + template<typename _Clock, typename _Duration> + bool + wait_until(unique_lock<mutex>& __lock, + const chrono::time_point<_Clock, _Duration>& __atime) + { + // DR 887 - Sync unknown clock to known clock. + typename _Clock::time_point __c_entry = _Clock::now(); + __clock_t::time_point __s_entry = __clock_t::now(); + chrono::nanoseconds __delta = __atime - __c_entry; + __clock_t::time_point __s_atime = __s_entry + __delta; + + return __wait_until_impl(__lock, __s_atime); + } + + 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)) + return __p(); + + return true; + } + + template<typename _Rep, typename _Period> + bool + wait_for(unique_lock<mutex>& __lock, + const chrono::duration<_Rep, _Period>& __rtime) + { return wait_until(__lock, __clock_t::now() + __rtime); } + + template<typename _Rep, typename _Period, typename _Predicate> + bool + wait_for(unique_lock<mutex>& __lock, + const chrono::duration<_Rep, _Period>& __rtime, + _Predicate __p) + { return wait_until(__lock, __clock_t::now() + __rtime, std::move(__p)); } + + native_handle_type + native_handle() + { return &_M_cond; } + + private: + template<typename _Clock, typename _Duration> + bool + __wait_until_impl(unique_lock<mutex>& __lock, + const chrono::time_point<_Clock, _Duration>& __atime) + { + chrono::time_point<__clock_t, chrono::seconds> __s = + chrono::time_point_cast<chrono::seconds>(__atime); + + chrono::nanoseconds __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()) + }; + + __gthread_cond_timedwait(&_M_cond, __lock.mutex()->native_handle(), + &__ts); + + return _Clock::now() < __atime; + } + }; + + /// condition_variable_any + // Like above, only mutex may not have try_lock. + class condition_variable_any + { + typedef __gthread_cond_t __native_type; + __native_type _M_cond; + + public: + typedef __native_type* native_handle_type; + + condition_variable_any(); + ~condition_variable_any(); + + condition_variable_any(const condition_variable_any&) = delete; + condition_variable_any& operator=(const condition_variable_any&) = delete; + + void + notify_one(); + + void + notify_all(); + + template<typename _Lock> + void + wait(_Lock& __lock); + + template<typename _Lock, typename _Predicate> + void + wait(_Lock& __lock, _Predicate __p); + + template<typename _Lock, typename _Clock, typename _Duration> + bool + wait_until(_Lock& __lock, + const chrono::time_point<_Clock, _Duration>& __atime); + + template<typename _Lock, typename _Clock, + typename _Duration, typename _Predicate> + bool + wait_until(_Lock& __lock, + const chrono::time_point<_Clock, _Duration>& __atime, + _Predicate __p); + + template<typename _Lock, typename _Rep, typename _Period> + bool + wait_for(_Lock& __lock, const chrono::duration<_Rep, _Period>& __rtime); + + template<typename _Lock, typename _Rep, + typename _Period, typename _Predicate> + bool + wait_for(_Lock& __lock, + const chrono::duration<_Rep, _Period>& __rtime, _Predicate __p); + + native_handle_type + native_handle() + { return &_M_cond; } + }; + + // @} group condition_variables +} + +#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 + +#endif // __GXX_EXPERIMENTAL_CXX0X__ + +#endif // _GLIBCXX_CONDITION_VARIABLE |