/*
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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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* Copyright (c) 2009 Helge Bahmann
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* Copyright (c) 2013 Tim Blechmann
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* Copyright (c) 2014 Andrey Semashev
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*/
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/*!
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* \file atomic/detail/ops_gcc_arm_common.hpp
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*
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* This header contains basic utilities for gcc ARM backend.
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*/
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#ifndef BOOST_ATOMIC_DETAIL_OPS_GCC_ARM_COMMON_HPP_INCLUDED_
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#define BOOST_ATOMIC_DETAIL_OPS_GCC_ARM_COMMON_HPP_INCLUDED_
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#include <boost/cstdint.hpp>
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#include <boost/memory_order.hpp>
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#include <boost/atomic/detail/config.hpp>
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#include <boost/atomic/detail/fence_arch_operations.hpp>
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#include <boost/atomic/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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namespace atomics {
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namespace detail {
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struct core_arch_operations_gcc_arm_base
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{
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static BOOST_CONSTEXPR_OR_CONST bool full_cas_based = false;
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static BOOST_CONSTEXPR_OR_CONST bool is_always_lock_free = true;
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static BOOST_FORCEINLINE void fence_before(memory_order order) BOOST_NOEXCEPT
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{
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if ((static_cast< unsigned int >(order) & static_cast< unsigned int >(memory_order_release)) != 0u)
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fence_arch_operations::hardware_full_fence();
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}
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static BOOST_FORCEINLINE void fence_after(memory_order order) BOOST_NOEXCEPT
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{
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if ((static_cast< unsigned int >(order) & (static_cast< unsigned int >(memory_order_consume) | static_cast< unsigned int >(memory_order_acquire))) != 0u)
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fence_arch_operations::hardware_full_fence();
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}
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static BOOST_FORCEINLINE void fence_after_store(memory_order order) BOOST_NOEXCEPT
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{
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if (order == memory_order_seq_cst)
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fence_arch_operations::hardware_full_fence();
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}
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};
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} // namespace detail
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} // namespace atomics
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} // namespace boost
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#include <boost/atomic/detail/footer.hpp>
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#endif // BOOST_ATOMIC_DETAIL_OPS_GCC_ARM_COMMON_HPP_INCLUDED_
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