1 | // Copyright (c) 2011 The LevelDB Authors. All rights reserved. |
2 | // Use of this source code is governed by a BSD-style license that can be |
3 | // found in the LICENSE file. See the AUTHORS file for names of contributors. |
4 | |
5 | #ifndef STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_ |
6 | #define STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_ |
7 | |
8 | #include "db/dbformat.h" |
9 | #include "leveldb/write_batch.h" |
10 | |
11 | namespace leveldb { |
12 | |
13 | class MemTable; |
14 | |
15 | // WriteBatchInternal provides static methods for manipulating a |
16 | // WriteBatch that we don't want in the public WriteBatch interface. |
17 | class WriteBatchInternal { |
18 | public: |
19 | // Return the number of entries in the batch. |
20 | static int Count(const WriteBatch* batch); |
21 | |
22 | // Set the count for the number of entries in the batch. |
23 | static void SetCount(WriteBatch* batch, int n); |
24 | |
25 | // Return the sequence number for the start of this batch. |
26 | static SequenceNumber Sequence(const WriteBatch* batch); |
27 | |
28 | // Store the specified number as the sequence number for the start of |
29 | // this batch. |
30 | static void SetSequence(WriteBatch* batch, SequenceNumber seq); |
31 | |
32 | static Slice Contents(const WriteBatch* batch) { return Slice(batch->rep_); } |
33 | |
34 | static size_t ByteSize(const WriteBatch* batch) { return batch->rep_.size(); } |
35 | |
36 | static void SetContents(WriteBatch* batch, const Slice& contents); |
37 | |
38 | static Status InsertInto(const WriteBatch* batch, MemTable* memtable); |
39 | |
40 | static void Append(WriteBatch* dst, const WriteBatch* src); |
41 | }; |
42 | |
43 | } // namespace leveldb |
44 | |
45 | #endif // STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_ |
46 | |