ceph/src/boost/libs/log/include/boost/log/detail/pause.hpp

   1 /*
   2  *             Copyright Andrey Semashev 2016.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   pause.hpp
   9  * \author Andrey Semashev
  10  * \date   06.01.2016
  11  *
  12  * \brief  This header is the Boost.Log library implementation, see the library documentation
  13  *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
  14  */
  15
  16 #ifndef BOOST_LOG_DETAIL_PAUSE_HPP_INCLUDED_
  17 #define BOOST_LOG_DETAIL_PAUSE_HPP_INCLUDED_
  18
  19 #include <boost/log/detail/config.hpp>
  20 #include <boost/log/detail/header.hpp>
  21
  22 #ifdef BOOST_HAS_PRAGMA_ONCE
  23 #pragma once
  24 #endif
  25
  26 #if defined(__INTEL_COMPILER) || defined(_MSC_VER)
  27 #    if defined(_M_IX86)
  28 #        define BOOST_LOG_AUX_PAUSE __asm { pause }
  29 #    elif defined(_M_AMD64)
  30 extern "C" void _mm_pause(void);
  31 #        if defined(BOOST_MSVC)
  32 #            pragma intrinsic(_mm_pause)
  33 #        endif
  34 #        define BOOST_LOG_AUX_PAUSE _mm_pause()
  35 #    endif
  36 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
  37 #    define BOOST_LOG_AUX_PAUSE __asm__ __volatile__("pause;")
  38 #endif
  39
  40 namespace boost {
  41
  42 BOOST_LOG_OPEN_NAMESPACE
  43
  44 namespace aux {
  45
  46 BOOST_FORCEINLINE void pause() BOOST_NOEXCEPT
  47 {
  48 #if defined(BOOST_LOG_AUX_PAUSE)
  49     BOOST_LOG_AUX_PAUSE;
  50 #endif
  51 }
  52
  53 } // namespace aux
  54
  55 BOOST_LOG_CLOSE_NAMESPACE // namespace log
  56
  57 } // namespace boost
  58
  59 #include <boost/log/detail/footer.hpp>
  60
  61 #endif // BOOST_LOG_DETAIL_PAUSE_HPP_INCLUDED_