314 lines
9.1 KiB
C++
314 lines
9.1 KiB
C++
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#ifndef BOOST_THREAD_PTHREAD_ONCE_ATOMIC_HPP
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#define BOOST_THREAD_PTHREAD_ONCE_ATOMIC_HPP
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// once.hpp
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//
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// (C) Copyright 2013 Andrey Semashev
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// (C) Copyright 2013 Vicente J. Botet Escriba
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/thread/detail/config.hpp>
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#include <boost/cstdint.hpp>
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#include <boost/thread/detail/move.hpp>
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#include <boost/thread/detail/invoke.hpp>
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#include <boost/core/no_exceptions_support.hpp>
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#include <boost/bind.hpp>
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#include <boost/atomic.hpp>
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#include <boost/config/abi_prefix.hpp>
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namespace boost
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{
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struct once_flag;
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namespace thread_detail
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{
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#if BOOST_ATOMIC_INT_LOCK_FREE == 2
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typedef unsigned int atomic_int_type;
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#elif BOOST_ATOMIC_SHORT_LOCK_FREE == 2
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typedef unsigned short atomic_int_type;
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#elif BOOST_ATOMIC_CHAR_LOCK_FREE == 2
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typedef unsigned char atomic_int_type;
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#elif BOOST_ATOMIC_LONG_LOCK_FREE == 2
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typedef unsigned long atomic_int_type;
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#elif defined(BOOST_HAS_LONG_LONG) && BOOST_ATOMIC_LLONG_LOCK_FREE == 2
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typedef ulong_long_type atomic_int_type;
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#else
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// All tested integer types are not atomic, the spinlock pool will be used
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typedef unsigned int atomic_int_type;
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#endif
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typedef boost::atomic<atomic_int_type> atomic_type;
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BOOST_THREAD_DECL bool enter_once_region(once_flag& flag) BOOST_NOEXCEPT;
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BOOST_THREAD_DECL void commit_once_region(once_flag& flag) BOOST_NOEXCEPT;
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BOOST_THREAD_DECL void rollback_once_region(once_flag& flag) BOOST_NOEXCEPT;
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inline atomic_type& get_atomic_storage(once_flag& flag) BOOST_NOEXCEPT;
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}
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#ifdef BOOST_THREAD_PROVIDES_ONCE_CXX11
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struct once_flag
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{
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BOOST_THREAD_NO_COPYABLE(once_flag)
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BOOST_CONSTEXPR once_flag() BOOST_NOEXCEPT : storage(0)
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{
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}
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private:
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thread_detail::atomic_type storage;
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friend BOOST_THREAD_DECL bool thread_detail::enter_once_region(once_flag& flag) BOOST_NOEXCEPT;
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friend BOOST_THREAD_DECL void thread_detail::commit_once_region(once_flag& flag) BOOST_NOEXCEPT;
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friend BOOST_THREAD_DECL void thread_detail::rollback_once_region(once_flag& flag) BOOST_NOEXCEPT;
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friend thread_detail::atomic_type& thread_detail::get_atomic_storage(once_flag& flag) BOOST_NOEXCEPT;
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};
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#define BOOST_ONCE_INIT boost::once_flag()
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namespace thread_detail
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{
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inline atomic_type& get_atomic_storage(once_flag& flag) BOOST_NOEXCEPT
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{
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//return reinterpret_cast< atomic_type& >(flag.storage);
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return flag.storage;
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}
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}
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#else // BOOST_THREAD_PROVIDES_ONCE_CXX11
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struct once_flag
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{
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// The thread_detail::atomic_int_type storage is marked
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// with this attribute in order to let the compiler know that it will alias this member
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// and silence compilation warnings.
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BOOST_THREAD_ATTRIBUTE_MAY_ALIAS thread_detail::atomic_int_type storage;
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};
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#define BOOST_ONCE_INIT {0}
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namespace thread_detail
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{
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inline atomic_type& get_atomic_storage(once_flag& flag) BOOST_NOEXCEPT
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{
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return reinterpret_cast< atomic_type& >(flag.storage);
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}
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}
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#endif // BOOST_THREAD_PROVIDES_ONCE_CXX11
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#if defined BOOST_THREAD_PROVIDES_INVOKE
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#define BOOST_THREAD_INVOKE_RET_VOID detail::invoke
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#define BOOST_THREAD_INVOKE_RET_VOID_CALL
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#elif defined BOOST_THREAD_PROVIDES_INVOKE_RET
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#define BOOST_THREAD_INVOKE_RET_VOID detail::invoke<void>
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#define BOOST_THREAD_INVOKE_RET_VOID_CALL
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#else
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#define BOOST_THREAD_INVOKE_RET_VOID boost::bind
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#define BOOST_THREAD_INVOKE_RET_VOID_CALL ()
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#endif
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#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
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template<typename Function, class ...ArgTypes>
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inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(ArgTypes)... args)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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BOOST_THREAD_INVOKE_RET_VOID(
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thread_detail::decay_copy(boost::forward<Function>(f)),
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thread_detail::decay_copy(boost::forward<ArgTypes>(args))...
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) BOOST_THREAD_INVOKE_RET_VOID_CALL;
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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#else
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template<typename Function>
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inline void call_once(once_flag& flag, Function f)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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f();
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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template<typename Function, typename T1>
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inline void call_once(once_flag& flag, Function f, T1 p1)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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BOOST_THREAD_INVOKE_RET_VOID(f, p1) BOOST_THREAD_INVOKE_RET_VOID_CALL;
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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template<typename Function, typename T1, typename T2>
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inline void call_once(once_flag& flag, Function f, T1 p1, T2 p2)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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BOOST_THREAD_INVOKE_RET_VOID(f, p1, p2) BOOST_THREAD_INVOKE_RET_VOID_CALL;
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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template<typename Function, typename T1, typename T2, typename T3>
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inline void call_once(once_flag& flag, Function f, T1 p1, T2 p2, T3 p3)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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BOOST_THREAD_INVOKE_RET_VOID(f, p1, p2, p3) BOOST_THREAD_INVOKE_RET_VOID_CALL;
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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#if !(defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x5130))
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template<typename Function>
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inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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f();
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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template<typename Function, typename T1>
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inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(T1) p1)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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BOOST_THREAD_INVOKE_RET_VOID(
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thread_detail::decay_copy(boost::forward<Function>(f)),
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thread_detail::decay_copy(boost::forward<T1>(p1))
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) BOOST_THREAD_INVOKE_RET_VOID_CALL;
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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template<typename Function, typename T1, typename T2>
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inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(T1) p1, BOOST_THREAD_RV_REF(T2) p2)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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BOOST_THREAD_INVOKE_RET_VOID(
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thread_detail::decay_copy(boost::forward<Function>(f)),
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thread_detail::decay_copy(boost::forward<T1>(p1)),
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thread_detail::decay_copy(boost::forward<T1>(p2))
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) BOOST_THREAD_INVOKE_RET_VOID_CALL;
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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template<typename Function, typename T1, typename T2, typename T3>
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inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(T1) p1, BOOST_THREAD_RV_REF(T2) p2, BOOST_THREAD_RV_REF(T3) p3)
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{
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if (thread_detail::enter_once_region(flag))
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{
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BOOST_TRY
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{
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BOOST_THREAD_INVOKE_RET_VOID(
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thread_detail::decay_copy(boost::forward<Function>(f)),
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thread_detail::decay_copy(boost::forward<T1>(p1)),
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thread_detail::decay_copy(boost::forward<T1>(p2)),
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thread_detail::decay_copy(boost::forward<T1>(p3))
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) BOOST_THREAD_INVOKE_RET_VOID_CALL;
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}
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BOOST_CATCH (...)
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{
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thread_detail::rollback_once_region(flag);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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thread_detail::commit_once_region(flag);
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}
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}
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#endif // __SUNPRO_CC
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#endif
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}
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#include <boost/config/abi_suffix.hpp>
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#endif
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