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