ceph/src/boost/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_