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+// 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
+#include <stdint.h>
+
+#include <memory>
+#include <string>
+
+#include "cache/cache_reservation_manager.h"
+#include "port/port.h"
+#include "rocksdb/flush_block_policy.h"
+#include "rocksdb/table.h"
+
+namespace ROCKSDB_NAMESPACE {
+struct ColumnFamilyOptions;
+struct ConfigOptions;
+struct DBOptions;
+struct EnvOptions;
+
+class BlockBasedTableBuilder;
+class RandomAccessFileReader;
+class WritableFileWriter;
+
+// A class used to track actual bytes written from the tail in the recent SST
+// file opens, and provide a suggestion for following open.
+class TailPrefetchStats {
+ public:
+ void RecordEffectiveSize(size_t len);
+ // 0 indicates no information to determine.
+ size_t GetSuggestedPrefetchSize();
+
+ private:
+ const static size_t kNumTracked = 32;
+ size_t records_[kNumTracked];
+ port::Mutex mutex_;
+ size_t next_ = 0;
+ size_t num_records_ = 0;
+};
+
+class BlockBasedTableFactory : public TableFactory {
+ public:
+ explicit BlockBasedTableFactory(
+ const BlockBasedTableOptions& table_options = BlockBasedTableOptions());
+
+ ~BlockBasedTableFactory() {}
+
+ // Method to allow CheckedCast to work for this class
+ static const char* kClassName() { return kBlockBasedTableName(); }
+
+ const char* Name() const override { return kBlockBasedTableName(); }
+
+ using TableFactory::NewTableReader;
+ Status NewTableReader(
+ const ReadOptions& ro, const TableReaderOptions& table_reader_options,
+ std::unique_ptr<RandomAccessFileReader>&& file, uint64_t file_size,
+ std::unique_ptr<TableReader>* table_reader,
+ bool prefetch_index_and_filter_in_cache = true) const override;
+
+ TableBuilder* NewTableBuilder(
+ const TableBuilderOptions& table_builder_options,
+ WritableFileWriter* file) const override;
+
+ // Valdates the specified DB Options.
+ Status ValidateOptions(const DBOptions& db_opts,
+ const ColumnFamilyOptions& cf_opts) const override;
+ Status PrepareOptions(const ConfigOptions& opts) override;
+
+ std::string GetPrintableOptions() const override;
+
+ bool IsDeleteRangeSupported() const override { return true; }
+
+ TailPrefetchStats* tail_prefetch_stats() { return &tail_prefetch_stats_; }
+
+ protected:
+ const void* GetOptionsPtr(const std::string& name) const override;
+#ifndef ROCKSDB_LITE
+ Status ParseOption(const ConfigOptions& config_options,
+ const OptionTypeInfo& opt_info,
+ const std::string& opt_name, const std::string& opt_value,
+ void* opt_ptr) override;
+#endif
+ void InitializeOptions();
+
+ private:
+ BlockBasedTableOptions table_options_;
+ std::shared_ptr<CacheReservationManager> table_reader_cache_res_mgr_;
+ mutable TailPrefetchStats tail_prefetch_stats_;
+};
+
+extern const std::string kHashIndexPrefixesBlock;
+extern const std::string kHashIndexPrefixesMetadataBlock;
+extern const std::string kPropTrue;
+extern const std::string kPropFalse;
+} // namespace ROCKSDB_NAMESPACE