| // <thread> -*- C++ -*- |
| |
| // Copyright (C) 2008, 2009, 2010, 2011 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/thread |
| * This is a Standard C++ Library header. |
| */ |
| |
| #ifndef _GLIBCXX_THREAD |
| #define _GLIBCXX_THREAD 1 |
| |
| #pragma GCC system_header |
| |
| #ifndef __GXX_EXPERIMENTAL_CXX0X__ |
| # include <bits/c++0x_warning.h> |
| #else |
| |
| #include <chrono> |
| #include <functional> |
| #include <memory> |
| #include <mutex> |
| #include <condition_variable> |
| #include <bits/functexcept.h> |
| #include <bits/functional_hash.h> |
| #include <bits/gthr.h> |
| |
| #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| /** |
| * @defgroup threads Threads |
| * @ingroup concurrency |
| * |
| * Classes for thread support. |
| * @{ |
| */ |
| |
| /// thread |
| class thread |
| { |
| public: |
| typedef __gthread_t native_handle_type; |
| struct _Impl_base; |
| typedef shared_ptr<_Impl_base> __shared_base_type; |
| |
| /// thread::id |
| class id |
| { |
| native_handle_type _M_thread; |
| |
| public: |
| id() : _M_thread() { } |
| |
| explicit |
| id(native_handle_type __id) : _M_thread(__id) { } |
| |
| private: |
| friend class thread; |
| friend class hash<thread::id>; |
| |
| friend bool |
| operator==(thread::id __x, thread::id __y) |
| { return __gthread_equal(__x._M_thread, __y._M_thread); } |
| |
| friend bool |
| operator<(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; |
| |
| inline virtual ~_Impl_base(); |
| |
| 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(thread&) = delete; |
| thread(const thread&) = delete; |
| |
| thread(thread&& __t) |
| { swap(__t); } |
| |
| template<typename _Callable, typename... _Args> |
| explicit |
| thread(_Callable&& __f, _Args&&... __args) |
| { |
| _M_start_thread(_M_make_routine(std::bind<void>( |
| std::forward<_Callable>(__f), |
| std::forward<_Args>(__args)...))); |
| } |
| |
| ~thread() |
| { |
| if (joinable()) |
| std::terminate(); |
| } |
| |
| thread& operator=(const thread&) = delete; |
| |
| thread& operator=(thread&& __t) |
| { |
| if (joinable()) |
| std::terminate(); |
| swap(__t); |
| return *this; |
| } |
| |
| void |
| swap(thread& __t) |
| { std::swap(_M_id, __t._M_id); } |
| |
| bool |
| joinable() const |
| { return !(_M_id == id()); } |
| |
| void |
| join(); |
| |
| void |
| detach(); |
| |
| thread::id |
| get_id() const |
| { return _M_id; } |
| |
| /** @pre thread is joinable |
| */ |
| native_handle_type |
| native_handle() |
| { return _M_id._M_thread; } |
| |
| // Returns a value that hints at the number of hardware thread contexts. |
| static unsigned int |
| hardware_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 thread::_Impl_base::~_Impl_base() = default; |
| |
| inline void |
| swap(thread& __x, thread& __y) |
| { __x.swap(__y); } |
| |
| inline bool |
| operator!=(thread::id __x, thread::id __y) |
| { return !(__x == __y); } |
| |
| inline bool |
| operator<=(thread::id __x, thread::id __y) |
| { return !(__y < __x); } |
| |
| inline bool |
| operator>(thread::id __x, thread::id __y) |
| { return __y < __x; } |
| |
| inline bool |
| operator>=(thread::id __x, thread::id __y) |
| { return !(__x < __y); } |
| |
| // DR 889. |
| /// std::hash specialization for thread::id. |
| template<> |
| struct hash<thread::id> |
| : public __hash_base<size_t, thread::id> |
| { |
| size_t |
| operator()(const thread::id& __id) const |
| { return std::_Hash_impl::hash(__id._M_thread); } |
| }; |
| |
| 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"; |
| else |
| return __out << __id._M_thread; |
| } |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| |
| /** @namespace std::this_thread |
| * @brief ISO C++ 0x entities sub namespace for thread. |
| * 30.2.2 Namespace this_thread. |
| */ |
| namespace this_thread |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| /// get_id |
| inline thread::id |
| get_id() { return thread::id(__gthread_self()); } |
| |
| #ifdef _GLIBCXX_USE_SCHED_YIELD |
| /// yield |
| inline void |
| yield() |
| { __gthread_yield(); } |
| #endif |
| |
| #ifdef _GLIBCXX_USE_NANOSLEEP |
| /// sleep_until |
| template<typename _Clock, typename _Duration> |
| inline void |
| sleep_until(const chrono::time_point<_Clock, _Duration>& __atime) |
| { sleep_for(__atime - _Clock::now()); } |
| |
| /// sleep_for |
| template<typename _Rep, typename _Period> |
| inline void |
| sleep_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 |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } |
| |
| // @} group threads |
| |
| } // namespace |
| |
| #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 |
| |
| #endif // __GXX_EXPERIMENTAL_CXX0X__ |
| |
| #endif // _GLIBCXX_THREAD |