log/detail/pause.hpp

0001 /*
0002  *             Copyright Andrey Semashev 2016.
0003  * Distributed under the Boost Software License, Version 1.0.
0004  *    (See accompanying file LICENSE_1_0.txt or copy at
0005  *          http://www.boost.org/LICENSE_1_0.txt)
0006  */
0007 /*!
0008  * \file   pause.hpp
0009  * \author Andrey Semashev
0010  * \date   06.01.2016
0011  *
0012  * \brief  This header is the Boost.Log library implementation, see the library documentation
0013  *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
0014  */
0015
0016 #ifndef BOOST_LOG_DETAIL_PAUSE_HPP_INCLUDED_
0017 #define BOOST_LOG_DETAIL_PAUSE_HPP_INCLUDED_
0018
0019 #include <boost/log/detail/config.hpp>
0020 #include <boost/log/detail/header.hpp>
0021
0022 #ifdef BOOST_HAS_PRAGMA_ONCE
0023 #pragma once
0024 #endif
0025
0026 #if defined(__INTEL_COMPILER) || defined(_MSC_VER)
0027 #    if defined(_M_IX86)
0028 #        define BOOST_LOG_AUX_PAUSE __asm { pause }
0029 #    elif defined(_M_AMD64)
0030 extern "C" void _mm_pause(void);
0031 #        if defined(BOOST_MSVC)
0032 #            pragma intrinsic(_mm_pause)
0033 #        endif
0034 #        define BOOST_LOG_AUX_PAUSE _mm_pause()
0035 #    endif
0036 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
0037 #    define BOOST_LOG_AUX_PAUSE __asm__ __volatile__("pause;")
0038 #endif
0039
0040 namespace boost {
0041
0042 BOOST_LOG_OPEN_NAMESPACE
0043
0044 namespace aux {
0045
0046 BOOST_FORCEINLINE void pause() BOOST_NOEXCEPT
0047 {
0048 #if defined(BOOST_LOG_AUX_PAUSE)
0049     BOOST_LOG_AUX_PAUSE;
0050 #endif
0051 }
0052
0053 } // namespace aux
0054
0055 BOOST_LOG_CLOSE_NAMESPACE // namespace log
0056
0057 } // namespace boost
0058
0059 #include <boost/log/detail/footer.hpp>
0060
0061 #endif // BOOST_LOG_DETAIL_PAUSE_HPP_INCLUDED_