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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "net/disk_cache/file_lock.h" | 5 #include "net/disk_cache/v2/file_lock.h" |
6 | 6 |
7 #include "base/atomicops.h" | 7 #include "base/atomicops.h" |
8 | 8 |
9 namespace { | 9 namespace { |
10 | 10 |
11 void Barrier() { | 11 void Barrier() { |
12 #if !defined(COMPILER_MSVC) | 12 #if !defined(COMPILER_MSVC) |
13 // VS uses memory barrier semantics for volatiles. | 13 // VS uses memory barrier semantics for volatiles. |
14 base::subtle::MemoryBarrier(); | 14 base::subtle::MemoryBarrier(); |
15 #endif | 15 #endif |
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38 } | 38 } |
39 | 39 |
40 void FileLock::Unlock() { | 40 void FileLock::Unlock() { |
41 if (!acquired_) | 41 if (!acquired_) |
42 return; | 42 return; |
43 Barrier(); | 43 Barrier(); |
44 (*updating_)--; | 44 (*updating_)--; |
45 } | 45 } |
46 | 46 |
47 } // namespace disk_cache | 47 } // namespace disk_cache |
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