components/user_prefs/tracked/pref_hash_store.h


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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_
#define COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_

#include "base/memory/scoped_ptr.h"

class HashStoreContents;
class PrefHashStoreTransaction;

// Holds the configuration and implementation used to calculate and verify
// preference MACs.
// TODO(gab): Rename this class as it is no longer a store.
class PrefHashStore {
 public:
  virtual ~PrefHashStore() {}

  // Returns a PrefHashStoreTransaction which can be used to perform a series
  // of operations on the hash store. |storage| MAY be used as the backing store
  // depending on the implementation. Therefore the HashStoreContents used for
  // related transactions should correspond to the same underlying data store.
  virtual scoped_ptr<PrefHashStoreTransaction> BeginTransaction(
      scoped_ptr<HashStoreContents> storage) = 0;
};

#endif  // COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_