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rocksdb/table/cuckoo_table_reader.h

71 lines
2.2 KiB

// Copyright (c) 2014, 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.
#pragma once
#ifndef ROCKSDB_LITE
#include <string>
#include <memory>
#include "db/dbformat.h"
#include "rocksdb/env.h"
#include "table/table_reader.h"
namespace rocksdb {
class Arena;
class TableReader;
class CuckooTableReader: public TableReader {
public:
CuckooTableReader(
const Options& options,
std::unique_ptr<RandomAccessFile>&& file,
uint64_t file_size,
uint64_t (*GetSliceHash)(const Slice&, uint32_t, uint64_t));
~CuckooTableReader() {}
std::shared_ptr<const TableProperties> GetTableProperties() const {
return table_props_;
}
Status status() const { return status_; }
Status Get(
const ReadOptions& readOptions, const Slice& key, void* handle_context,
bool (*result_handler)(void* arg, const ParsedInternalKey& k,
const Slice& v),
void (*mark_key_may_exist_handler)(void* handle_context) = nullptr);
Iterator* NewIterator(const ReadOptions&, Arena* arena = nullptr);
// Following methods are not implemented for Cuckoo Table Reader
uint64_t ApproximateOffsetOf(const Slice& key) { return 0; }
void SetupForCompaction() {}
void Prepare(const Slice& target) {}
// End of methods not implemented.
private:
std::unique_ptr<RandomAccessFile> file_;
Slice file_data_;
const uint64_t file_size_;
bool is_last_level_;
std::shared_ptr<const TableProperties> table_props_;
Status status_;
uint32_t num_hash_fun_;
std::string unused_key_;
uint32_t key_length_;
uint32_t value_length_;
uint32_t bucket_length_;
uint64_t num_buckets_;
uint64_t (*GetSliceHash)(const Slice& s, uint32_t index,
uint64_t max_num_buckets);
};
} // namespace rocksdb
#endif // ROCKSDB_LITE