| 1 | #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED |
| 2 | #define BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED |
| 3 | |
| 4 | // MS compatible compilers support #pragma once |
| 5 | |
| 6 | #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| 7 | # pragma once |
| 8 | #endif |
| 9 | |
| 10 | // boost/smart_ptr/detail/sp_thread_pause.hpp |
| 11 | // |
| 12 | // inline void bost::detail::sp_thread_pause(); |
| 13 | // |
| 14 | // Emits a "pause" instruction. |
| 15 | // |
| 16 | // Copyright 2008, 2020 Peter Dimov |
| 17 | // Distributed under the Boost Software License, Version 1.0 |
| 18 | // https://www.boost.org/LICENSE_1_0.txt |
| 19 | |
| 20 | #if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) ) && !defined(__c2__) |
| 21 | |
| 22 | extern "C" void _mm_pause(); |
| 23 | |
| 24 | #define BOOST_SP_PAUSE _mm_pause(); |
| 25 | |
| 26 | #elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) ) |
| 27 | |
| 28 | #define BOOST_SP_PAUSE __asm__ __volatile__( "rep; nop" : : : "memory" ); |
| 29 | |
| 30 | #else |
| 31 | |
| 32 | #define BOOST_SP_PAUSE |
| 33 | |
| 34 | #endif |
| 35 | |
| 36 | namespace boost |
| 37 | { |
| 38 | namespace detail |
| 39 | { |
| 40 | |
| 41 | inline void sp_thread_pause() |
| 42 | { |
| 43 | BOOST_SP_PAUSE |
| 44 | } |
| 45 | |
| 46 | } // namespace detail |
| 47 | } // namespace boost |
| 48 | |
| 49 | #undef BOOST_SP_PAUSE |
| 50 | |
| 51 | #endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED |
| 52 | |