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Diffstat (limited to 'boost/atomic/detail/pause.hpp')
-rw-r--r-- | boost/atomic/detail/pause.hpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/boost/atomic/detail/pause.hpp b/boost/atomic/detail/pause.hpp new file mode 100644 index 0000000000..37aa5ca84e --- /dev/null +++ b/boost/atomic/detail/pause.hpp @@ -0,0 +1,43 @@ +/* + * Distributed under the Boost Software License, Version 1.0. + * (See accompanying file LICENSE_1_0.txt or copy at + * http://www.boost.org/LICENSE_1_0.txt) + * + * (C) Copyright 2013 Tim Blechmann + * (C) Copyright 2013 Andrey Semashev + */ + +#ifndef BOOST_ATOMIC_DETAIL_PAUSE_HPP_INCLUDED_ +#define BOOST_ATOMIC_DETAIL_PAUSE_HPP_INCLUDED_ + +#include <boost/atomic/detail/config.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +#if defined(_MSC_VER) && (defined(_M_AMD64) || defined(_M_IX86)) +extern "C" void _mm_pause(void); +#if defined(BOOST_MSVC) +#pragma intrinsic(_mm_pause) +#endif +#endif + +namespace boost { +namespace atomics { +namespace detail { + +BOOST_FORCEINLINE void pause() BOOST_NOEXCEPT +{ +#if defined(_MSC_VER) && (defined(_M_AMD64) || defined(_M_IX86)) + _mm_pause(); +#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) + __asm__ __volatile__("pause;"); +#endif +} + +} // namespace detail +} // namespace atomics +} // namespace boost + +#endif // BOOST_ATOMIC_DETAIL_PAUSE_HPP_INCLUDED_ |