Imported Upstream version 1.72.0
[platform/upstream/boost.git] / boost / atomic / detail / ops_msvc_common.hpp
1 /*
2  * Distributed under the Boost Software License, Version 1.0.
3  * (See accompanying file LICENSE_1_0.txt or copy at
4  * http://www.boost.org/LICENSE_1_0.txt)
5  *
6  * Copyright (c) 2009 Helge Bahmann
7  * Copyright (c) 2012 Tim Blechmann
8  * Copyright (c) 2014, 2019 Andrey Semashev
9  */
10 /*!
11  * \file   atomic/detail/ops_msvc_common.hpp
12  *
13  * This header contains common tools for MSVC implementation of the \c operations template.
14  */
15
16 #ifndef BOOST_ATOMIC_DETAIL_OPS_MSVC_COMMON_HPP_INCLUDED_
17 #define BOOST_ATOMIC_DETAIL_OPS_MSVC_COMMON_HPP_INCLUDED_
18
19 #include <boost/atomic/detail/config.hpp>
20
21 #ifdef BOOST_HAS_PRAGMA_ONCE
22 #pragma once
23 #endif
24
25 // Define compiler barriers
26 #if defined(__INTEL_COMPILER)
27 #define BOOST_ATOMIC_DETAIL_COMPILER_BARRIER() __memory_barrier()
28 #elif defined(__clang__)
29 #define BOOST_ATOMIC_DETAIL_COMPILER_BARRIER() __atomic_signal_fence(__ATOMIC_SEQ_CST)
30 #elif defined(_MSC_VER) && !defined(_WIN32_WCE)
31 extern "C" void _ReadWriteBarrier(void);
32 #pragma intrinsic(_ReadWriteBarrier)
33 #define BOOST_ATOMIC_DETAIL_COMPILER_BARRIER() _ReadWriteBarrier()
34 #endif
35
36 #ifndef BOOST_ATOMIC_DETAIL_COMPILER_BARRIER
37 #define BOOST_ATOMIC_DETAIL_COMPILER_BARRIER()
38 #endif
39
40 #endif // BOOST_ATOMIC_DETAIL_OPS_MSVC_COMMON_HPP_INCLUDED_