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674cf41732
Summary: block_based_table_reader.cc is a giant file, which makes it hard for users to navigate the code. Divide the files to multiple files. Some class templates cannot be moved to .cc file. They are moved to .h files. It is still better than including them all in block_based_table_reader.cc. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6527 Test Plan: "make all check" and "make release". Also build using cmake. Differential Revision: D20428455 fbshipit-source-id: ca713c698469f07f35bc0c271358c0874ed4eb28
55 lines
2 KiB
C++
55 lines
2 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "table/block_based/index_reader_common.h"
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namespace ROCKSDB_NAMESPACE {
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Status BlockBasedTable::IndexReaderCommon::ReadIndexBlock(
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const BlockBasedTable* table, FilePrefetchBuffer* prefetch_buffer,
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const ReadOptions& read_options, bool use_cache, GetContext* get_context,
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BlockCacheLookupContext* lookup_context,
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CachableEntry<Block>* index_block) {
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PERF_TIMER_GUARD(read_index_block_nanos);
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assert(table != nullptr);
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assert(index_block != nullptr);
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assert(index_block->IsEmpty());
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const Rep* const rep = table->get_rep();
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assert(rep != nullptr);
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const Status s = table->RetrieveBlock(
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prefetch_buffer, read_options, rep->footer.index_handle(),
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UncompressionDict::GetEmptyDict(), index_block, BlockType::kIndex,
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get_context, lookup_context, /* for_compaction */ false, use_cache);
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return s;
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}
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Status BlockBasedTable::IndexReaderCommon::GetOrReadIndexBlock(
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bool no_io, GetContext* get_context,
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BlockCacheLookupContext* lookup_context,
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CachableEntry<Block>* index_block) const {
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assert(index_block != nullptr);
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if (!index_block_.IsEmpty()) {
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index_block->SetUnownedValue(index_block_.GetValue());
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return Status::OK();
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}
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ReadOptions read_options;
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if (no_io) {
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read_options.read_tier = kBlockCacheTier;
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}
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return ReadIndexBlock(table_, /*prefetch_buffer=*/nullptr, read_options,
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cache_index_blocks(), get_context, lookup_context,
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index_block);
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}
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} // namespace ROCKSDB_NAMESPACE
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