Replace Atomic32 with webrtc/base/atomicops.h.

webrtc/system_wrappers/source/atomic32_win.cc

-/*
- *  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"
-
-namespace webrtc {
-
-Atomic32::Atomic32(int32_t initial_value)
-    : value_(initial_value) {
-  static_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