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rocksdb/db/snapshot_checker.h

28 lines
770 B

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
#include "rocksdb/types.h"
namespace rocksdb {
class WritePreparedTxnDB;
// Callback class created by WritePreparedTxnDB to check if a key
// is visible by a snapshot.
class SnapshotChecker {
public:
explicit SnapshotChecker(WritePreparedTxnDB* txn_db);
bool IsInSnapshot(SequenceNumber sequence,
SequenceNumber snapshot_sequence) const;
private:
#ifndef ROCKSDB_LITE
const WritePreparedTxnDB* const txn_db_;
#endif // !ROCKSDB_LITE
};
} // namespace rocksdb