| // 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_DB_WRITE_BATCH_INTERNAL_H_ |
| #define STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_ |
| |
| #include "leveldb/write_batch.h" |
| |
| namespace leveldb { |
| |
| class MemTable; |
| |
| // WriteBatchInternal provides static methods for manipulating a |
| // WriteBatch that we don't want in the public WriteBatch interface. |
| class WriteBatchInternal { |
| public: |
| // Return the number of entries in the batch. |
| static int Count(const WriteBatch* batch); |
| |
| // Set the count for the number of entries in the batch. |
| static void SetCount(WriteBatch* batch, int n); |
| |
| // Return the sequence number for the start of this batch. |
| static SequenceNumber Sequence(const WriteBatch* batch); |
| |
| // Store the specified number as the sequence number for the start of |
| // this batch. |
| static void SetSequence(WriteBatch* batch, SequenceNumber seq); |
| |
| static Slice Contents(const WriteBatch* batch) { |
| return Slice(batch->rep_); |
| } |
| |
| static size_t ByteSize(const WriteBatch* batch) { |
| return batch->rep_.size(); |
| } |
| |
| static void SetContents(WriteBatch* batch, const Slice& contents); |
| |
| static Status InsertInto(const WriteBatch* batch, MemTable* memtable); |
| |
| static void Append(WriteBatch* dst, const WriteBatch* src); |
| }; |
| |
| } // namespace leveldb |
| |
| |
| #endif // STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_ |