rocksdb/util/hash_cuckoo_rep.h
2014-04-30 09:03:24 -07:00

43 lines
1.5 KiB
C++

// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
// 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 ROCKSDB_LITE
#pragma once
#include "rocksdb/slice_transform.h"
#include "rocksdb/memtablerep.h"
namespace rocksdb {
class HashCuckooRepFactory : public MemTableRepFactory {
public:
// maxinum number of hash functions used in the cuckoo hash.
static const unsigned int kMaxHashCount = 10;
explicit HashCuckooRepFactory(size_t write_buffer_size,
size_t average_data_size,
unsigned int hash_function_count)
: write_buffer_size_(write_buffer_size),
average_data_size_(average_data_size),
hash_function_count_(hash_function_count) {}
virtual ~HashCuckooRepFactory() {}
virtual MemTableRep* CreateMemTableRep(
const MemTableRep::KeyComparator& compare, Arena* arena,
const SliceTransform* transform) override;
virtual const char* Name() const override { return "HashCuckooRepFactory"; }
private:
size_t write_buffer_size_;
size_t average_data_size_;
const unsigned int hash_function_count_;
};
} // namespace rocksdb
#endif // ROCKSDB_LITE