63e88f80
 Hu Chunming
提交三方库
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// Copyright Oliver Kowalke 2017.
// 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)
//
#ifndef BOOST_FIBER_DETAIL_RTM_H
#define BOOST_FIBER_DETAIL_RTM_H
#include <cstdint>
#include <boost/assert.hpp>
#include <boost/config.hpp>
#include <boost/fiber/detail/config.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace fibers {
namespace detail {
struct rtm_status {
enum {
none = 0,
explicit_abort = 1 << 0,
may_retry = 1 << 1,
memory_conflict = 1 << 2,
buffer_overflow = 1 << 3,
debug_hit = 1 << 4,
nested_abort = 1 << 5
};
static constexpr std::uint32_t success = ~std::uint32_t{ 0 };
};
static BOOST_FORCEINLINE
std::uint32_t rtm_begin() noexcept {
std::uint32_t result = rtm_status::success;
__asm__ __volatile__
(
".byte 0xc7,0xf8 ; .long 0"
: "+a" (result)
:
: "memory"
);
return result;
}
static BOOST_FORCEINLINE
void rtm_end() noexcept {
__asm__ __volatile__
(
".byte 0x0f,0x01,0xd5"
:
:
: "memory"
);
}
static BOOST_FORCEINLINE
void rtm_abort_lock_not_free() noexcept {
__asm__ __volatile__
(
".byte 0xc6,0xf8,0xff"
:
:
: "memory"
);
}
static BOOST_FORCEINLINE
bool rtm_test() noexcept {
bool result;
__asm__ __volatile__
(
".byte 0x0f,0x01,0xd6; setz %0"
: "=q" (result)
:
: "memory"
);
return result;
}
}}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_FIBER_DETAIL_RTM_H
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