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 <inttypes.h> 15#include <malloc.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 __sync_fetch_and_add(&_value, 1) + 1; 33} 34 35WebRtc_Word32 Atomic32::operator--() 36{ 37 return __sync_fetch_and_sub(&_value, 1) - 1; 38} 39 40WebRtc_Word32 Atomic32::operator+=(WebRtc_Word32 value) 41{ 42 WebRtc_Word32 returnValue = __sync_fetch_and_add(&_value, value); 43 returnValue += value; 44 return returnValue; 45} 46 47WebRtc_Word32 Atomic32::operator-=(WebRtc_Word32 value) 48{ 49 WebRtc_Word32 returnValue = __sync_fetch_and_sub(&_value, value); 50 returnValue -= value; 51 return returnValue; 52} 53 54bool Atomic32::CompareExchange(WebRtc_Word32 newValue, 55 WebRtc_Word32 compareValue) 56{ 57 return __sync_bool_compare_and_swap(&_value, compareValue, newValue); 58} 59 60WebRtc_Word32 Atomic32::Value() const 61{ 62 return _value; 63} 64} // namespace webrtc 65