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 
pause()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_
62