65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
|
/*
|
||
|
|
* 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)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2009, 2011 Helge Bahmann
|
||
|
|
* Copyright (c) 2009 Phil Endecott
|
||
|
|
* Copyright (c) 2013 Tim Blechmann
|
||
|
|
* Linux-specific code by Phil Endecott
|
||
|
|
* Copyright (c) 2014 Andrey Semashev
|
||
|
|
*/
|
||
|
|
/*!
|
||
|
|
* \file atomic/detail/fence_ops_linux_arm.hpp
|
||
|
|
*
|
||
|
|
* This header contains implementation of the \c fence_operations struct.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef BOOST_ATOMIC_DETAIL_FENCE_OPS_LINUX_ARM_HPP_INCLUDED_
|
||
|
|
#define BOOST_ATOMIC_DETAIL_FENCE_OPS_LINUX_ARM_HPP_INCLUDED_
|
||
|
|
|
||
|
|
#include <boost/memory_order.hpp>
|
||
|
|
#include <boost/atomic/detail/config.hpp>
|
||
|
|
#include <boost/atomic/detail/header.hpp>
|
||
|
|
|
||
|
|
#ifdef BOOST_HAS_PRAGMA_ONCE
|
||
|
|
#pragma once
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace boost {
|
||
|
|
namespace atomics {
|
||
|
|
namespace detail {
|
||
|
|
|
||
|
|
//! Fence operations based on Linux-specific system routines
|
||
|
|
struct fence_operations_linux_arm
|
||
|
|
{
|
||
|
|
static BOOST_FORCEINLINE void thread_fence(memory_order order) BOOST_NOEXCEPT
|
||
|
|
{
|
||
|
|
if (order != memory_order_relaxed)
|
||
|
|
hardware_full_fence();
|
||
|
|
}
|
||
|
|
|
||
|
|
static BOOST_FORCEINLINE void signal_fence(memory_order order) BOOST_NOEXCEPT
|
||
|
|
{
|
||
|
|
if (order != memory_order_relaxed)
|
||
|
|
__asm__ __volatile__ ("" ::: "memory");
|
||
|
|
}
|
||
|
|
|
||
|
|
static BOOST_FORCEINLINE void hardware_full_fence() BOOST_NOEXCEPT
|
||
|
|
{
|
||
|
|
// See the comment in core_ops_linux_arm.hpp regarding the function pointer below
|
||
|
|
typedef void (*kernel_dmb_t)(void);
|
||
|
|
((kernel_dmb_t)0xffff0fa0)();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
typedef fence_operations_linux_arm fence_operations;
|
||
|
|
|
||
|
|
} // namespace detail
|
||
|
|
} // namespace atomics
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#include <boost/atomic/detail/footer.hpp>
|
||
|
|
|
||
|
|
#endif // BOOST_ATOMIC_DETAIL_FENCE_OPS_LINUX_ARM_HPP_INCLUDED_
|