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Contents
#ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED
#define BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED
// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
// boost/smart_ptr/detail/sp_thread_pause.hpp
//
// inline void bost::detail::sp_thread_pause();
//
// Emits a "pause" instruction.
//
// Copyright 2008, 2020 Peter Dimov
// Distributed under the Boost Software License, Version 1.0
// https://www.boost.org/LICENSE_1_0.txt
#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) ) && !defined(__c2__)
extern "C" void _mm_pause();
#define BOOST_SP_PAUSE _mm_pause();
#elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) )
#define BOOST_SP_PAUSE __asm__ __volatile__( "rep; nop" : : : "memory" );
#else
#define BOOST_SP_PAUSE
#endif
namespace boost
{
namespace detail
{
inline void sp_thread_pause()
{
BOOST_SP_PAUSE
}
} // namespace detail
} // namespace boost
#undef BOOST_SP_PAUSE
#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED
Version data entries
12 entries across 12 versions & 1 rubygems