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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_CHROMEBOX_FOR_MEETINGS_ARTEMIS_PERSISTENT_DB_H_
#define CHROME_BROWSER_ASH_CHROMEBOX_FOR_MEETINGS_ARTEMIS_PERSISTENT_DB_H_
#include <stddef.h>
#include "base/sequence_checker.h"
namespace ash::cfm {
// This is an abstraction around a persistent cache that will
// assist in crash recovery for incremental sources (eg logs).
// Note that this Db is explicitly a mapping of ints to ints.
//
// Not sequence safe! Access to the db should be localized to
// a single sequence.
class PersistentDb {
public:
PersistentDb();
virtual ~PersistentDb();
PersistentDb(const PersistentDb&) = delete;
PersistentDb& operator=(const PersistentDb&) = delete;
// Manage singleton instance.
static void Initialize();
static void InitializeForTesting(PersistentDb* db);
static void Shutdown();
static void ShutdownForTesting();
static PersistentDb* Get();
static bool IsInitialized();
// This db acts like a dict, so provide dict-like get & save methods.
virtual int GetValueFromKey(int key, int default_value);
virtual void SaveValueToKey(int key, int value);
virtual void DeleteKeyIfExists(int key);
virtual size_t GetSize() const;
private:
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace ash::cfm
#endif // CHROME_BROWSER_ASH_CHROMEBOX_FOR_MEETINGS_ARTEMIS_PERSISTENT_DB_H_
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