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/*
* 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) 2017 Andrey Semashev
*/
/*!
* \file atomic/detail/extra_ops_msvc_arm.hpp
*
* This header contains implementation of the extra atomic operations for ARM.
*/
#ifndef BOOST_ATOMIC_DETAIL_EXTRA_OPS_MSVC_ARM_HPP_INCLUDED_
#define BOOST_ATOMIC_DETAIL_EXTRA_OPS_MSVC_ARM_HPP_INCLUDED_
#include <cstddef>
#include <boost/memory_order.hpp>
#include <boost/atomic/detail/config.hpp>
#include <boost/atomic/detail/interlocked.hpp>
#include <boost/atomic/detail/storage_type.hpp>
#include <boost/atomic/detail/extra_operations_fwd.hpp>
#include <boost/atomic/detail/extra_ops_generic.hpp>
#include <boost/atomic/capabilities.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
namespace atomics {
namespace detail {
#if defined(BOOST_ATOMIC_INTERLOCKED_BTS) && defined(BOOST_ATOMIC_INTERLOCKED_BTR)
template< typename Base, std::size_t Size, bool Signed >
struct extra_operations< Base, 4u, Signed, true > :
public generic_extra_operations< Base, 4u, Signed >
{
typedef generic_extra_operations< Base, 4u, Signed > base_type;
typedef typename base_type::storage_type storage_type;
static BOOST_FORCEINLINE bool bit_test_and_set(storage_type volatile& storage, unsigned int bit_number, memory_order order) BOOST_NOEXCEPT
{
#if defined(BOOST_ATOMIC_INTERLOCKED_BTS_RELAXED) && defined(BOOST_ATOMIC_INTERLOCKED_BTS_ACQUIRE) && defined(BOOST_ATOMIC_INTERLOCKED_BTS_RELEASE)
bool result;
switch (order)
{
case memory_order_relaxed:
result = !!BOOST_ATOMIC_INTERLOCKED_BTS_RELAXED(&storage, bit_number);
break;
case memory_order_consume:
case memory_order_acquire:
result = !!BOOST_ATOMIC_INTERLOCKED_BTS_ACQUIRE(&storage, bit_number);
break;
case memory_order_release:
result = !!BOOST_ATOMIC_INTERLOCKED_BTS_RELEASE(&storage, bit_number);
break;
case memory_order_acq_rel:
case memory_order_seq_cst:
default:
result = !!BOOST_ATOMIC_INTERLOCKED_BTS(&storage, bit_number);
break;
}
return result;
#else
return !!BOOST_ATOMIC_INTERLOCKED_BTS(&storage, bit_number);
#endif
}
static BOOST_FORCEINLINE bool bit_test_and_reset(storage_type volatile& storage, unsigned int bit_number, memory_order order) BOOST_NOEXCEPT
{
#if defined(BOOST_ATOMIC_INTERLOCKED_BTR_RELAXED) && defined(BOOST_ATOMIC_INTERLOCKED_BTR_ACQUIRE) && defined(BOOST_ATOMIC_INTERLOCKED_BTR_RELEASE)
bool result;
switch (order)
{
case memory_order_relaxed:
result = !!BOOST_ATOMIC_INTERLOCKED_BTR_RELAXED(&storage, bit_number);
break;
case memory_order_consume:
case memory_order_acquire:
result = !!BOOST_ATOMIC_INTERLOCKED_BTR_ACQUIRE(&storage, bit_number);
break;
case memory_order_release:
result = !!BOOST_ATOMIC_INTERLOCKED_BTR_RELEASE(&storage, bit_number);
break;
case memory_order_acq_rel:
case memory_order_seq_cst:
default:
result = !!BOOST_ATOMIC_INTERLOCKED_BTR(&storage, bit_number);
break;
}
return result;
#else
return !!BOOST_ATOMIC_INTERLOCKED_BTR(&storage, bit_number);
#endif
}
};
#endif // defined(BOOST_ATOMIC_INTERLOCKED_BTS) && defined(BOOST_ATOMIC_INTERLOCKED_BTR)
} // namespace detail
} // namespace atomics
} // namespace boost
#endif // BOOST_ATOMIC_DETAIL_EXTRA_OPS_MSVC_ARM_HPP_INCLUDED_
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