components/user_prefs/tracked/pref_hash_store.h

   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 #ifndef COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_
   6 #define COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9
  10 class HashStoreContents;
  11 class PrefHashStoreTransaction;
  12
  13 // Holds the configuration and implementation used to calculate and verify
  14 // preference MACs.
  15 // TODO(gab): Rename this class as it is no longer a store.
  16 class PrefHashStore {
  17  public:
  18   virtual ~PrefHashStore() {}
  19
  20   // Returns a PrefHashStoreTransaction which can be used to perform a series
  21   // of operations on the hash store. |storage| MAY be used as the backing store
  22   // depending on the implementation. Therefore the HashStoreContents used for
  23   // related transactions should correspond to the same underlying data store.
  24   virtual scoped_ptr<PrefHashStoreTransaction> BeginTransaction(
  25       scoped_ptr<HashStoreContents> storage) = 0;
  26 };
  27
  28 #endif  // COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_