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1 // Copyright (c) 2006-2008 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 #include "net/disk_cache/file_lock.h"
6 
7 namespace disk_cache {
8 
FileLock(BlockFileHeader * header)9 FileLock::FileLock(BlockFileHeader* header) {
10   updating_ = &header->updating;
11   (*updating_)++;
12   acquired_ = true;
13 }
14 
Lock()15 void FileLock::Lock() {
16   if (acquired_)
17     return;
18   (*updating_)++;
19 }
20 
Unlock()21 void FileLock::Unlock() {
22   if (!acquired_)
23     return;
24   (*updating_)--;
25 }
26 
27 }  // namespace disk_cache
28