From e6918187568dbd01842d8d1d2c808ce16a894239 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 21 Apr 2024 13:54:28 +0200
Subject: Adding upstream version 18.2.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../table/block_based/block_based_table_factory.h  | 101 +++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 src/rocksdb/table/block_based/block_based_table_factory.h

(limited to 'src/rocksdb/table/block_based/block_based_table_factory.h')

diff --git a/src/rocksdb/table/block_based/block_based_table_factory.h b/src/rocksdb/table/block_based/block_based_table_factory.h
new file mode 100644
index 000000000..3166cd3cc
--- /dev/null
+++ b/src/rocksdb/table/block_based/block_based_table_factory.h
@@ -0,0 +1,101 @@
+//  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
-- 
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