1/* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#include "atomic32.h" 12 13#include <assert.h> 14#include <libkern/OSAtomic.h> 15#include <stdlib.h> 16 17#include "common_types.h" 18 19namespace webrtc { 20 21Atomic32::Atomic32(WebRtc_Word32 initialValue) : _value(initialValue) 22{ 23 assert(Is32bitAligned()); 24} 25 26Atomic32::~Atomic32() 27{ 28} 29 30WebRtc_Word32 Atomic32::operator++() 31{ 32 return OSAtomicIncrement32Barrier(&_value); 33} 34 35WebRtc_Word32 Atomic32::operator--() 36{ 37 return OSAtomicDecrement32Barrier(&_value); 38} 39 40WebRtc_Word32 Atomic32::operator+=(WebRtc_Word32 value) 41{ 42 return OSAtomicAdd32Barrier(value, &_value); 43} 44 45WebRtc_Word32 Atomic32::operator-=(WebRtc_Word32 value) 46{ 47 return OSAtomicAdd32Barrier(-value, &_value); 48} 49 50bool Atomic32::CompareExchange(WebRtc_Word32 newValue, 51 WebRtc_Word32 compareValue) 52{ 53 return OSAtomicCompareAndSwap32Barrier(compareValue, newValue, &_value); 54} 55 56WebRtc_Word32 Atomic32::Value() const 57{ 58 return _value; 59} 60} // namespace webrtc 61