atomicops.h revision eb525c5499e34cc9c4b825d6d9e75bb07cc06ace 
1/* Copyright 2013 The Chromium Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 */
5
6#ifndef LIBRARIES_SDK_UTIL_ATOMICOPS_H_
7#define LIBRARIES_SDK_UTIL_ATOMICOPS_H_
8
9#ifndef WIN32
10
11#include <stdint.h>
12typedef int32_t Atomic32;
13
14#ifndef __llvm__
15static inline void MemoryBarrier() {
16  __sync_synchronize();
17}
18#endif
19
20inline Atomic32 AtomicAddFetch(volatile Atomic32* ptr, Atomic32 value) {
21  return __sync_add_and_fetch(ptr, value);
22}
23
24#else
25
26#include <windows.h>
27
28/* Undefine many Windows.h macros that we almost certainly do not want. */
29#undef min
30#undef max
31#undef PostMessage
32#undef interface
33
34typedef long Atomic32;
35
36/* Windows.h already defines a MemoryBarrier macro. */
37
38inline Atomic32 AtomicAddFetch(volatile Atomic32* ptr, Atomic32 value) {
39  return InterlockedExchangeAdd(ptr, value);
40}
41#endif
42
43
44#endif  /* LIBRARIES_SDK_UTIL_ATOMICOPS_H_ */
45