// <thread> -*- 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 thread* This is a Standard C++ Library header.*/#ifndef _GLIBCXX_THREAD#define _GLIBCXX_THREAD 1#pragma GCC system_header#ifndef __GXX_EXPERIMENTAL_CXX0X__# include <c++0x_warning.h>#else#include <chrono>#include <functional>#include <memory>#include <mutex>#include <condition_variable>#include <cstddef>#include <bits/functexcept.h>#include <bits/gthr.h>#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)namespace std{/*** @defgroup threads Threads* @ingroup concurrency** Classes for thread support.* @{*//// threadclass thread{public:typedef __gthread_t native_handle_type;struct _Impl_base;typedef shared_ptr<_Impl_base> __shared_base_type;/// thread::idclass id{native_handle_type _M_thread;public:id() : _M_thread() { }explicitid(native_handle_type __id) : _M_thread(__id) { }private:friend class thread;friend booloperator==(thread::id __x, thread::id __y){ return __gthread_equal(__x._M_thread, __y._M_thread); }friend booloperator<(thread::id __x, thread::id __y){ return __x._M_thread < __y._M_thread; }template<class _CharT, class _Traits>friend basic_ostream<_CharT, _Traits>&operator<<(basic_ostream<_CharT, _Traits>&& __out, thread::id __id);};// Simple base type that the templatized, derived class containing// an arbitrary functor can be converted to and called.struct _Impl_base{__shared_base_type _M_this_ptr;virtual ~_Impl_base() = default;virtual void _M_run() = 0;};template<typename _Callable>struct _Impl : public _Impl_base{_Callable _M_func;_Impl(_Callable&& __f) : _M_func(std::forward<_Callable>(__f)){ }void_M_run() { _M_func(); }};private:id _M_id;public:thread() = default;thread(const thread&) = delete;thread(thread&& __t){ swap(__t); }template<typename _Callable>explicit thread(_Callable __f){ _M_start_thread(_M_make_routine<_Callable>(__f)); }template<typename _Callable, typename... _Args>thread(_Callable&& __f, _Args&&... __args){ _M_start_thread(_M_make_routine(std::bind(__f, __args...))); }~thread(){if (joinable())std::terminate();}thread& operator=(const thread&) = delete;thread& operator=(thread&& __t){if (joinable())std::terminate();swap(__t);return *this;}voidswap(thread&& __t){ std::swap(_M_id, __t._M_id); }booljoinable() const{ return !(_M_id == id()); }voidjoin();voiddetach();thread::idget_id() const{ return _M_id; }/** @pre thread is joinable*/native_handle_typenative_handle(){ return _M_id._M_thread; }// Returns a value that hints at the number of hardware thread contexts.static unsigned inthardware_concurrency(){ return 0; }private:void_M_start_thread(__shared_base_type);template<typename _Callable>shared_ptr<_Impl<_Callable>>_M_make_routine(_Callable&& __f){// Create and allocate full data structure, not base.return make_shared<_Impl<_Callable>>(std::forward<_Callable>(__f));}};inline voidswap(thread& __x, thread& __y){ __x.swap(__y); }inline voidswap(thread&& __x, thread& __y){ __x.swap(__y); }inline voidswap(thread& __x, thread&& __y){ __x.swap(__y); }inline booloperator!=(thread::id __x, thread::id __y){ return !(__x == __y); }inline booloperator<=(thread::id __x, thread::id __y){ return !(__y < __x); }inline booloperator>(thread::id __x, thread::id __y){ return __y < __x; }inline booloperator>=(thread::id __x, thread::id __y){ return !(__x < __y); }template<class _CharT, class _Traits>inline basic_ostream<_CharT, _Traits>&operator<<(basic_ostream<_CharT, _Traits>&& __out, thread::id __id){if (__id == thread::id())return __out << "thread::id of a non-executing thread";elsereturn __out << __id._M_thread;}/** @namespace std::this_thread* @brief ISO C++ 0x entities sub namespace for thread.* 30.2.2 Namespace this_thread.*/namespace this_thread{/// get_idinline thread::idget_id() { return thread::id(__gthread_self()); }#ifdef _GLIBCXX_USE_SCHED_YIELD/// yieldinline voidyield(){ __gthread_yield(); }#endif#ifdef _GLIBCXX_USE_NANOSLEEP/// sleep_untiltemplate<typename _Clock, typename _Duration>inline voidsleep_until(const chrono::time_point<_Clock, _Duration>& __atime){ sleep_for(__atime - _Clock::now()); }/// sleep_fortemplate<typename _Rep, typename _Period>inline voidsleep_for(const chrono::duration<_Rep, _Period>& __rtime){chrono::seconds __s =chrono::duration_cast<chrono::seconds>(__rtime);chrono::nanoseconds __ns =chrono::duration_cast<chrono::nanoseconds>(__rtime - __s);__gthread_time_t __ts ={static_cast<std::time_t>(__s.count()),static_cast<long>(__ns.count())};::nanosleep(&__ts, 0);}#endif}// @} group threads}#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1#endif // __GXX_EXPERIMENTAL_CXX0X__#endif // _GLIBCXX_THREAD