backend_worker_v3.h revision 03b57e008b61dfcb1fbad3aea950ae0e001748b0 
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
3// found in the LICENSE file.
4
5// See net/disk_cache/disk_cache.h for the public interface of the cache.
6
7#ifndef NET_DISK_CACHE_BLOCKFILE_BACKEND_WORKER_V3_H_
8#define NET_DISK_CACHE_BLOCKFILE_BACKEND_WORKER_V3_H_
9
10#include "base/containers/hash_tables.h"
11#include "base/files/file_path.h"
12#include "base/memory/ref_counted.h"
13#include "net/disk_cache/blockfile/addr.h"
14#include "net/disk_cache/blockfile/backend_impl_v3.h"
15#include "net/disk_cache/blockfile/block_files.h"
16
17namespace base {
18class SingleThreadTaskRunner;
19}  // namespace base
20
21namespace disk_cache {
22
23class BackendImplV3::Worker : public base::RefCountedThreadSafe<Worker> {
24 public:
25  Worker(const base::FilePath& path,
26         const scoped_refptr<base::SingleThreadTaskRunner>& main_thread);
27
28  // Performs general initialization for this current instance of the cache.
29  int Init(const CompletionCallback& callback);
30
31 private:
32  friend class base::RefCountedThreadSafe<Worker>;
33
34  ~Worker();
35  void CleanupCache();
36
37  // Returns the full name for an external storage file.
38  base::FilePath GetFileName(Addr address) const;
39
40  // Creates a new backing file for the cache index.
41  bool CreateBackingStore(disk_cache::File* file);
42  bool InitBackingStore(bool* file_created);
43
44  // Performs basic checks on the index file. Returns false on failure.
45  bool CheckIndex();
46
47  base::FilePath path_;  // Path to the folder used as backing storage.
48  BlockFiles block_files_;  // Set of files used to store all data.
49  bool init_;  // controls the initialization of the system.
50
51  DISALLOW_COPY_AND_ASSIGN(Worker);
52};
53
54}  // namespace disk_cache
55
56#endif  // NET_DISK_CACHE_BLOCKFILE_BACKEND_WORKER_V3_H_
57