net/disk_cache/blockfile/backend_worker_v3.h

   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
  17 namespace base {
  18 class SingleThreadTaskRunner;
  19 }  // namespace base
  20
  21 namespace disk_cache {
  22
  23 class 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_