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50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/system_wrappers/interface/atomic32.h"
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#include <assert.h>
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#include <libkern/OSAtomic.h>
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#include <stdlib.h>
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#include "webrtc/common_types.h"
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namespace webrtc {
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Atomic32::Atomic32(int32_t initial_value)
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: value_(initial_value) {
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assert(Is32bitAligned());
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}
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Atomic32::~Atomic32() {
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}
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int32_t Atomic32::operator++() {
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return OSAtomicIncrement32Barrier(&value_);
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}
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int32_t Atomic32::operator--() {
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return OSAtomicDecrement32Barrier(&value_);
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}
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int32_t Atomic32::operator+=(int32_t value) {
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return OSAtomicAdd32Barrier(value, &value_);
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}
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int32_t Atomic32::operator-=(int32_t value) {
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return OSAtomicAdd32Barrier(-value, &value_);
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}
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bool Atomic32::CompareExchange(int32_t new_value, int32_t compare_value) {
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return OSAtomicCompareAndSwap32Barrier(compare_value, new_value, &value_);
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}
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} // namespace webrtc
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