Line data    Source code

       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 "leveldb/write_batch.h"
       9             : 
      10             : namespace leveldb {
      11             : 
      12             : class MemTable;
      13             : 
      14             : // WriteBatchInternal provides static methods for manipulating a
      15             : // WriteBatch that we don't want in the public WriteBatch interface.
      16             : class WriteBatchInternal {
      17             :  public:
      18             :   // Return the number of entries in the batch.
      19             :   static int Count(const WriteBatch* batch);
      20             : 
      21             :   // Set the count for the number of entries in the batch.
      22             :   static void SetCount(WriteBatch* batch, int n);
      23             : 
      24             :   // Return the sequence number for the start of this batch.
      25             :   static SequenceNumber Sequence(const WriteBatch* batch);
      26             : 
      27             :   // Store the specified number as the sequence number for the start of
      28             :   // this batch.
      29             :   static void SetSequence(WriteBatch* batch, SequenceNumber seq);
      30             : 
      31             :   static Slice Contents(const WriteBatch* batch) {
      32         551 :     return Slice(batch->rep_);
      33             :   }
      34             : 
      35             :   static size_t ByteSize(const WriteBatch* batch) {
      36         551 :     return batch->rep_.size();
      37             :   }
      38             : 
      39             :   static void SetContents(WriteBatch* batch, const Slice& contents);
      40             : 
      41             :   static Status InsertInto(const WriteBatch* batch, MemTable* memtable);
      42             : 
      43             :   static void Append(WriteBatch* dst, const WriteBatch* src);
      44             : };
      45             : 
      46             : }  // namespace leveldb
      47             : 
      48             : 
      49             : #endif  // STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_