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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/table/cuckoo/cuckoo_table_reader.h | |
parent | Initial commit. (diff) | |
download | ceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/rocksdb/table/cuckoo/cuckoo_table_reader.h')
-rw-r--r-- | src/rocksdb/table/cuckoo/cuckoo_table_reader.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/rocksdb/table/cuckoo/cuckoo_table_reader.h b/src/rocksdb/table/cuckoo/cuckoo_table_reader.h new file mode 100644 index 000000000..f6c599ae8 --- /dev/null +++ b/src/rocksdb/table/cuckoo/cuckoo_table_reader.h @@ -0,0 +1,100 @@ +// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. +// This source code is licensed under both the GPLv2 (found in the +// COPYING file in the root directory) and Apache 2.0 License +// (found in the LICENSE.Apache file in the root 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 <memory> +#include <string> +#include <utility> +#include <vector> + +#include "file/random_access_file_reader.h" +#include "rocksdb/env.h" +#include "rocksdb/options.h" +#include "table/table_reader.h" + +namespace ROCKSDB_NAMESPACE { + +class Arena; +class TableReader; +struct ImmutableOptions; + +class CuckooTableReader : public TableReader { + public: + CuckooTableReader(const ImmutableOptions& ioptions, + std::unique_ptr<RandomAccessFileReader>&& file, + uint64_t file_size, const Comparator* user_comparator, + uint64_t (*get_slice_hash)(const Slice&, uint32_t, + uint64_t)); + ~CuckooTableReader() {} + + std::shared_ptr<const TableProperties> GetTableProperties() const override { + return table_props_; + } + + Status status() const { return status_; } + + Status Get(const ReadOptions& readOptions, const Slice& key, + GetContext* get_context, const SliceTransform* prefix_extractor, + bool skip_filters = false) override; + + // Returns a new iterator over table contents + // compaction_readahead_size: its value will only be used if for_compaction = + // true + InternalIterator* NewIterator(const ReadOptions&, + const SliceTransform* prefix_extractor, + Arena* arena, bool skip_filters, + TableReaderCaller caller, + size_t compaction_readahead_size = 0, + bool allow_unprepared_value = false) override; + void Prepare(const Slice& target) override; + + // Report an approximation of how much memory has been used. + size_t ApproximateMemoryUsage() const override; + + // Following methods are not implemented for Cuckoo Table Reader + uint64_t ApproximateOffsetOf(const Slice& /*key*/, + TableReaderCaller /*caller*/) override { + return 0; + } + + uint64_t ApproximateSize(const Slice& /*start*/, const Slice& /*end*/, + TableReaderCaller /*caller*/) override { + return 0; + } + + void SetupForCompaction() override {} + // End of methods not implemented. + + private: + friend class CuckooTableIterator; + void LoadAllKeys(std::vector<std::pair<Slice, uint32_t>>* key_to_bucket_id); + std::unique_ptr<RandomAccessFileReader> file_; + Slice file_data_; + bool is_last_level_; + bool identity_as_first_hash_; + bool use_module_hash_; + std::shared_ptr<const TableProperties> table_props_; + Status status_; + uint32_t num_hash_func_; + std::string unused_key_; + uint32_t key_length_; + uint32_t user_key_length_; + uint32_t value_length_; + uint32_t bucket_length_; + uint32_t cuckoo_block_size_; + uint32_t cuckoo_block_bytes_minus_one_; + uint64_t table_size_; + const Comparator* ucomp_; + uint64_t (*get_slice_hash_)(const Slice& s, uint32_t index, + uint64_t max_num_buckets); +}; + +} // namespace ROCKSDB_NAMESPACE +#endif // ROCKSDB_LITE |