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src/leveldb/table/two_level_iterator.h
31 строка
1 KB
Wladimir J. van der Laan
Update to leveldb upstream using subtree merge
28 янв 2020, 18:59
28 янв 2020, 18:59
20a6bab
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// 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_TABLE_TWO_LEVEL_ITERATOR_H_ #define STORAGE_LEVELDB_TABLE_TWO_LEVEL_ITERATOR_H_ #include "leveldb/iterator.h" namespace leveldb { struct ReadOptions; // Return a new two level iterator. A two-level iterator contains an // index iterator whose values point to a sequence of blocks where // each block is itself a sequence of key,value pairs. The returned // two-level iterator yields the concatenation of all key/value pairs // in the sequence of blocks. Takes ownership of "index_iter" and // will delete it when no longer needed. // // Uses a supplied function to convert an index_iter value into // an iterator over the contents of the corresponding block. Iterator* NewTwoLevelIterator( Iterator* index_iter, Iterator* (*block_function)(void* arg, const ReadOptions& options, const Slice& index_value), void* arg, const ReadOptions& options); } // namespace leveldb #endif // STORAGE_LEVELDB_TABLE_TWO_LEVEL_ITERATOR_H_