| 1 | /* |
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| 2 | * Distributed under the Boost Software License, Version 1.0. |
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| 3 | * (See accompanying file LICENSE_1_0.txt or copy at |
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| 4 | * http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | * |
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| 6 | * Copyright (c) 2011 Helge Bahmann |
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| 7 | * Copyright (c) 2013 Tim Blechmann |
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| 8 | * Copyright (c) 2014 Andrey Semashev |
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| 9 | */ |
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| 10 | /*! |
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| 11 | * \file atomic/fences.hpp |
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| 12 | * |
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| 13 | * This header contains definition of \c atomic_thread_fence and \c atomic_signal_fence functions. |
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| 14 | */ |
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| 15 | |
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| 16 | #ifndef BOOST_ATOMIC_FENCES_HPP_INCLUDED_ |
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| 17 | #define BOOST_ATOMIC_FENCES_HPP_INCLUDED_ |
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| 18 | |
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| 19 | #include <boost/memory_order.hpp> |
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| 20 | #include <boost/atomic/capabilities.hpp> |
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| 21 | #include <boost/atomic/detail/operations.hpp> |
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| 22 | |
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| 23 | #ifdef BOOST_HAS_PRAGMA_ONCE |
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| 24 | #pragma once |
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| 25 | #endif |
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| 26 | |
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| 27 | /* |
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| 28 | * IMPLEMENTATION NOTE: All interface functions MUST be declared with BOOST_FORCEINLINE, |
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| 29 | * see comment for convert_memory_order_to_gcc in ops_gcc_atomic.hpp. |
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| 30 | */ |
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| 31 | |
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| 32 | namespace boost { |
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| 33 | |
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| 34 | namespace atomics { |
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| 35 | |
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| 36 | #if BOOST_ATOMIC_THREAD_FENCE > 0 |
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| 37 | BOOST_FORCEINLINE void atomic_thread_fence(memory_order order) BOOST_NOEXCEPT |
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| 38 | { |
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| 39 | detail::thread_fence(order); |
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| 40 | } |
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| 41 | #else |
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| 42 | BOOST_FORCEINLINE void atomic_thread_fence(memory_order) BOOST_NOEXCEPT |
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| 43 | { |
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| 44 | detail::lockpool::thread_fence(); |
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| 45 | } |
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| 46 | #endif |
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| 47 | |
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| 48 | #if BOOST_ATOMIC_SIGNAL_FENCE > 0 |
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| 49 | BOOST_FORCEINLINE void atomic_signal_fence(memory_order order) BOOST_NOEXCEPT |
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| 50 | { |
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| 51 | detail::signal_fence(order); |
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| 52 | } |
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| 53 | #else |
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| 54 | BOOST_FORCEINLINE void atomic_signal_fence(memory_order) BOOST_NOEXCEPT |
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| 55 | { |
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| 56 | detail::lockpool::signal_fence(); |
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| 57 | } |
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| 58 | #endif |
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| 59 | |
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| 60 | } // namespace atomics |
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| 61 | |
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| 62 | using atomics::atomic_thread_fence; |
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| 63 | using atomics::atomic_signal_fence; |
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| 64 | |
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| 65 | } // namespace boost |
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| 66 | |
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| 67 | #endif // BOOST_ATOMIC_FENCES_HPP_INCLUDED_ |
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| 68 | |
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