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 19 namespace webrtc { 20 21 Atomic32::Atomic32(WebRtc_Word32 initialValue) : _value(initialValue) 22 { 23 assert(Is32bitAligned()); 24 } 25 26 Atomic32::~Atomic32() 27 { 28 } 29 30 WebRtc_Word32 Atomic32::operator++() 31 { 32 return OSAtomicIncrement32Barrier(&_value); 33 } 34 35 WebRtc_Word32 Atomic32::operator--() 36 { 37 return OSAtomicDecrement32Barrier(&_value); 38 } 39 40 WebRtc_Word32 Atomic32::operator+=(WebRtc_Word32 value) 41 { 42 return OSAtomicAdd32Barrier(value, &_value); 43 } 44 45 WebRtc_Word32 Atomic32::operator-=(WebRtc_Word32 value) 46 { 47 return OSAtomicAdd32Barrier(-value, &_value); 48 } 49 50 bool Atomic32::CompareExchange(WebRtc_Word32 newValue, 51 WebRtc_Word32 compareValue) 52 { 53 return OSAtomicCompareAndSwap32Barrier(compareValue, newValue, &_value); 54 } 55 56 WebRtc_Word32 Atomic32::Value() const 57 { 58 return _value; 59 } 60 } // namespace webrtc 61
