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source: webrtc/webrtc/system_wrappers/source/atomic32_posix.cc @ 0:4bda6873e34c

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Last change on this file since 0:4bda6873e34c was 0:4bda6873e34c, checked in by Michael Prittie <mprittie@…>, 6 years ago

Scrubbed password for publication.

File size: 1.3 KB
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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/interface/atomic32.h"
12
13#include <assert.h>
14#include <inttypes.h>
15#include <malloc.h>
16
17#include "webrtc/common_types.h"
18
19namespace webrtc {
20
21Atomic32::Atomic32(int32_t initial_value)
22    : value_(initial_value) {
23  assert(Is32bitAligned());
24}
25
26Atomic32::~Atomic32() {
27}
28
29int32_t Atomic32::operator++() {
30  return __sync_fetch_and_add(&value_, 1) + 1;
31}
32
33int32_t Atomic32::operator--() {
34  return __sync_fetch_and_sub(&value_, 1) - 1;
35}
36
37int32_t Atomic32::operator+=(int32_t value) {
38  int32_t return_value = __sync_fetch_and_add(&value_, value);
39  return_value += value;
40  return return_value;
41}
42
43int32_t Atomic32::operator-=(int32_t value) {
44  int32_t return_value = __sync_fetch_and_sub(&value_, value);
45  return_value -= value;
46  return return_value;
47}
48
49bool Atomic32::CompareExchange(int32_t new_value, int32_t compare_value) {
50  return __sync_bool_compare_and_swap(&value_, compare_value, new_value);
51}
52
53}  // namespace webrtc
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