Line data    Source code

       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 "webrtc/system_wrappers/include/atomic32.h"
      12             : 
      13             : #include <assert.h>
      14             : #include <inttypes.h>
      15             : 
      16             : #include "webrtc/common_types.h"
      17             : 
      18             : namespace webrtc {
      19             : 
      20           0 : Atomic32::Atomic32(int32_t initial_value)
      21           0 :     : value_(initial_value) {
      22           0 :   assert(Is32bitAligned());
      23           0 : }
      24             : 
      25           0 : Atomic32::~Atomic32() {
      26           0 : }
      27             : 
      28           0 : int32_t Atomic32::operator++() {
      29           0 :   return __sync_fetch_and_add(&value_, 1) + 1;
      30             : }
      31             : 
      32           0 : int32_t Atomic32::operator--() {
      33           0 :   return __sync_fetch_and_sub(&value_, 1) - 1;
      34             : }
      35             : 
      36           0 : int32_t Atomic32::operator+=(int32_t value) {
      37           0 :   int32_t return_value = __sync_fetch_and_add(&value_, value);
      38           0 :   return_value += value;
      39           0 :   return return_value;
      40             : }
      41             : 
      42           0 : int32_t Atomic32::operator-=(int32_t value) {
      43           0 :   int32_t return_value = __sync_fetch_and_sub(&value_, value);
      44           0 :   return_value -= value;
      45           0 :   return return_value;
      46             : }
      47             : 
      48           0 : bool Atomic32::CompareExchange(int32_t new_value, int32_t compare_value) {
      49           0 :   return __sync_bool_compare_and_swap(&value_, compare_value, new_value);
      50             : }
      51             : 
      52             : }  // namespace webrtc