281 lines
6.5 KiB
C++
281 lines
6.5 KiB
C++
// <thread> -*- C++ -*-
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// Copyright (C) 2008 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this library; see the file COPYING. If not, write to
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// the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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// Boston, MA 02110-1301, USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/** @file thread
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* This is a Standard C++ Library header.
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*/
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#ifndef _GLIBCXX_THREAD
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#define _GLIBCXX_THREAD 1
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#pragma GCC system_header
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#ifndef __GXX_EXPERIMENTAL_CXX0X__
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# include <c++0x_warning.h>
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#else
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#include <chrono>
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#include <exception>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <condition_variable>
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#include <type_traits>
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#include <cstddef>
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#include <bits/functexcept.h>
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#include <bits/gthr.h>
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#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
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namespace std
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{
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class __thread_data_base;
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typedef shared_ptr<__thread_data_base> __thread_data_ptr;
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class __thread_data_base : public enable_shared_from_this<__thread_data_base>
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{
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public:
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__thread_data_base() = default;
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virtual ~__thread_data_base() = default;
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virtual void __run() const = 0;
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__gthread_t _M_thread_handle;
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__thread_data_ptr _M_this_ptr;
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mutex _M_data_mutex;
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};
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template<typename _Callable>
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class __thread_data : public __thread_data_base
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{
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public:
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__thread_data(_Callable&& __f)
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: _M_func(std::forward<_Callable>(__f))
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{ }
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void __run() const
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{ _M_func(); }
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private:
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_Callable _M_func;
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};
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/// thread
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class thread
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{
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public:
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// types
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class id;
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typedef __gthread_t native_handle_type;
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// cons
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thread();
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template<typename _Callable>
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explicit thread(_Callable __f)
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: _M_thread_data(__make_thread_data(__f))
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{ __start_thread(); }
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template<typename _Callable, typename... _Args>
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thread(_Callable&& __f, _Args&&... __args)
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: _M_thread_data(__make_thread_data(std::bind(__f, __args...)))
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{ __start_thread(); }
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~thread();
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thread(const thread&) = delete;
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thread(thread&&);
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thread& operator=(const thread&) = delete;
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thread& operator=(thread&&);
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// members
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void
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swap(thread&& __t);
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bool
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joinable() const;
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void
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join();
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void
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detach();
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id
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get_id() const;
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native_handle_type
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native_handle()
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{ return _M_thread_data->_M_thread_handle; }
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// static members
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static unsigned hardware_concurrency();
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__thread_data_ptr
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_M_get_thread_data() const
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{
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lock_guard<mutex> __l(_M_thread_data_mutex);
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return _M_thread_data;
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}
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private:
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template<typename _Callable>
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__thread_data_ptr
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__make_thread_data(_Callable&& __f)
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{
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return __thread_data_ptr(
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new __thread_data<_Callable>(std::forward<_Callable>(__f)));
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}
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__thread_data_ptr
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__make_thread_data(void(*__f)())
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{ return __thread_data_ptr(new __thread_data<void(*)()>(__f)); }
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void __start_thread();
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__thread_data_ptr _M_thread_data;
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mutable mutex _M_thread_data_mutex;
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};
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inline void
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swap(thread& __x, thread& __y)
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{ __x.swap(__y); }
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inline void
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swap(thread&& __x, thread& __y)
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{ __x.swap(__y); }
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inline void
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swap(thread& __x, thread&& __y)
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{ __x.swap(__y); }
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namespace this_thread
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{
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thread::id
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get_id();
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void
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yield();
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template<typename _Clock, typename _Duration>
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void
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sleep_until(const chrono::time_point<_Clock, _Duration>& __atime)
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{
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sleep_for(__atime - _Clock::now());
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}
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template<typename _Rep, typename _Period>
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void
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sleep_for(const chrono::duration<_Rep, _Period>& __rtime)
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{
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chrono::seconds __s =
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chrono::duration_cast<chrono::seconds>(__rtime);
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chrono::nanoseconds __ns =
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chrono::duration_cast<chrono::nanoseconds>(__rtime - __s);
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__gthread_time_t __ts =
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{
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static_cast<std::time_t>(__s.count()),
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static_cast<long>(__ns.count())
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};
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#ifdef _GLIBCXX_USE_NANOSLEEP
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::nanosleep(&__ts, 0);
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#endif
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}
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}
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/// thread::id
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class thread::id
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{
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public:
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id() : _M_thread_id() { }
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private:
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friend class thread;
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friend thread::id this_thread::get_id();
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friend bool
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operator==(thread::id __x, thread::id __y)
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{
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return
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static_cast<bool>(__gthread_equal(__x._M_thread_id, __y._M_thread_id));
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}
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friend bool
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operator<(thread::id __x, thread::id __y)
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{ return __x._M_thread_id < __y._M_thread_id; }
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template<class _CharT, class _Traits>
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friend basic_ostream<_CharT, _Traits>&
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operator<<(basic_ostream<_CharT, _Traits>&& __out, thread::id __id);
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id(__gthread_t __id)
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: _M_thread_id(__id)
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{ }
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__gthread_t _M_thread_id;
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};
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inline bool
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operator!=(thread::id __x, thread::id __y)
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{ return !(__x == __y); }
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inline bool
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operator<=(thread::id __x, thread::id __y)
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{ return !(__y < __x); }
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inline bool
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operator>(thread::id __x, thread::id __y)
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{ return __y < __x; }
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inline bool
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operator>=(thread::id __x, thread::id __y)
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{ return !(__x < __y); }
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template<class _CharT, class _Traits>
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inline basic_ostream<_CharT, _Traits>&
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operator<<(basic_ostream<_CharT, _Traits>&& __out, thread::id __id)
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{
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if(__id == thread::id())
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return __out << "non-executing thread";
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else
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return __out << __id._M_thread_id;
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}
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}
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#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1
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#endif // __GXX_EXPERIMENTAL_CXX0X__
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#endif // _GLIBCXX_THREAD
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