95 lines
1.7 KiB
C++
95 lines
1.7 KiB
C++
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// Copyright Oliver Kowalke 2017.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_FIBER_DETAIL_RTM_H
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#define BOOST_FIBER_DETAIL_RTM_H
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#include <cstdint>
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#include <boost/assert.hpp>
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#include <boost/config.hpp>
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#include <boost/fiber/detail/config.hpp>
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_PREFIX
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#endif
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namespace boost {
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namespace fibers {
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namespace detail {
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struct rtm_status {
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enum {
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none = 0,
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explicit_abort = 1 << 0,
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may_retry = 1 << 1,
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memory_conflict = 1 << 2,
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buffer_overflow = 1 << 3,
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debug_hit = 1 << 4,
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nested_abort = 1 << 5
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};
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static constexpr std::uint32_t success = ~std::uint32_t{ 0 };
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};
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static BOOST_FORCEINLINE
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std::uint32_t rtm_begin() noexcept {
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std::uint32_t result = rtm_status::success;
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__asm__ __volatile__
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(
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".byte 0xc7,0xf8 ; .long 0"
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: "+a" (result)
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:
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: "memory"
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);
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return result;
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}
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static BOOST_FORCEINLINE
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void rtm_end() noexcept {
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__asm__ __volatile__
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(
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".byte 0x0f,0x01,0xd5"
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:
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:
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: "memory"
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);
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}
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static BOOST_FORCEINLINE
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void rtm_abort_lock_not_free() noexcept {
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__asm__ __volatile__
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(
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".byte 0xc6,0xf8,0xff"
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:
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:
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: "memory"
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);
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}
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static BOOST_FORCEINLINE
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bool rtm_test() noexcept {
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bool result;
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__asm__ __volatile__
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(
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".byte 0x0f,0x01,0xd6; setz %0"
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: "=q" (result)
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:
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: "memory"
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);
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return result;
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}
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}}}
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_SUFFIX
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#endif
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#endif // BOOST_FIBER_DETAIL_RTM_H
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