mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-21 07:27:30 +00:00
62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/*
|
|
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "webrtc/system_wrappers/interface/atomic32.h"
|
|
|
|
#include <assert.h>
|
|
#include <windows.h>
|
|
|
|
#include "webrtc/common_types.h"
|
|
#include "webrtc/system_wrappers/interface/compile_assert.h"
|
|
|
|
namespace webrtc {
|
|
|
|
Atomic32::Atomic32(int32_t initial_value)
|
|
: value_(initial_value) {
|
|
COMPILE_ASSERT(sizeof(value_) == sizeof(LONG),
|
|
counter_variable_is_the_expected_size);
|
|
assert(Is32bitAligned());
|
|
}
|
|
|
|
Atomic32::~Atomic32() {
|
|
}
|
|
|
|
int32_t Atomic32::operator++() {
|
|
return static_cast<int32_t>(InterlockedIncrement(
|
|
reinterpret_cast<volatile LONG*>(&value_)));
|
|
}
|
|
|
|
int32_t Atomic32::operator--() {
|
|
return static_cast<int32_t>(InterlockedDecrement(
|
|
reinterpret_cast<volatile LONG*>(&value_)));
|
|
}
|
|
|
|
int32_t Atomic32::operator+=(int32_t value) {
|
|
return InterlockedExchangeAdd(reinterpret_cast<volatile LONG*>(&value_),
|
|
value);
|
|
}
|
|
|
|
int32_t Atomic32::operator-=(int32_t value) {
|
|
return InterlockedExchangeAdd(reinterpret_cast<volatile LONG*>(&value_),
|
|
-value);
|
|
}
|
|
|
|
bool Atomic32::CompareExchange(int32_t new_value, int32_t compare_value) {
|
|
const LONG old_value = InterlockedCompareExchange(
|
|
reinterpret_cast<volatile LONG*>(&value_),
|
|
new_value,
|
|
compare_value);
|
|
|
|
// If the old value and the compare value is the same an exchange happened.
|
|
return (old_value == compare_value);
|
|
}
|
|
|
|
} // namespace webrtc
|