chromium/third_party/leveldatabase/src/include/leveldb/db.h

// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.

#ifndef STORAGE_LEVELDB_INCLUDE_DB_H_
#define STORAGE_LEVELDB_INCLUDE_DB_H_

#include <cstdint>
#include <cstdio>

#include "leveldb/export.h"
#include "leveldb/iterator.h"
#include "leveldb/options.h"

namespace leveldb {

// Update CMakeLists.txt if you change these
static const int kMajorVersion = …;
static const int kMinorVersion = …;

struct Options;
struct ReadOptions;
struct WriteOptions;
class WriteBatch;

// Abstract handle to particular state of a DB.
// A Snapshot is an immutable object and can therefore be safely
// accessed from multiple threads without any external synchronization.
class LEVELDB_EXPORT Snapshot { … };

// A range of keys
struct LEVELDB_EXPORT Range { … };

// A DB is a persistent ordered map from keys to values.
// A DB is safe for concurrent access from multiple threads without
// any external synchronization.
class LEVELDB_EXPORT DB { … };

// Destroy the contents of the specified database.
// Be very careful using this method.
//
// Note: For backwards compatibility, if DestroyDB is unable to list the
// database files, Status::OK() will still be returned masking this failure.
LEVELDB_EXPORT Status DestroyDB(const std::string& name,
                                const Options& options);

// If a DB cannot be opened, you may attempt to call this method to
// resurrect as much of the contents of the database as possible.
// Some data may be lost, so be careful when calling this function
// on a database that contains important information.
LEVELDB_EXPORT Status RepairDB(const std::string& dbname,
                               const Options& options);

}  // namespace leveldb

#endif  // STORAGE_LEVELDB_INCLUDE_DB_H_