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 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 __sync_fetch_and_add(&_value, 1) + 1; 33 } 34 35 WebRtc_Word32 Atomic32::operator--() 36 { 37 return __sync_fetch_and_sub(&_value, 1) - 1; 38 } 39 40 WebRtc_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 47 WebRtc_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 54 bool Atomic32::CompareExchange(WebRtc_Word32 newValue, 55 WebRtc_Word32 compareValue) 56 { 57 return __sync_bool_compare_and_swap(&_value, compareValue, newValue); 58 } 59 60 WebRtc_Word32 Atomic32::Value() const 61 { 62 return _value; 63 } 64 } // namespace webrtc 65
