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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/block_based/binary_search_index_reader.cc | |
parent | Initial commit. (diff) | |
download | ceph-upstream/18.2.2.tar.xz ceph-upstream/18.2.2.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/block_based/binary_search_index_reader.cc')
-rw-r--r-- | src/rocksdb/table/block_based/binary_search_index_reader.cc | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/rocksdb/table/block_based/binary_search_index_reader.cc b/src/rocksdb/table/block_based/binary_search_index_reader.cc new file mode 100644 index 000000000..21787cc1a --- /dev/null +++ b/src/rocksdb/table/block_based/binary_search_index_reader.cc @@ -0,0 +1,74 @@ +// 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. +#include "table/block_based/binary_search_index_reader.h" + +namespace ROCKSDB_NAMESPACE { +Status BinarySearchIndexReader::Create( + const BlockBasedTable* table, const ReadOptions& ro, + FilePrefetchBuffer* prefetch_buffer, bool use_cache, bool prefetch, + bool pin, BlockCacheLookupContext* lookup_context, + std::unique_ptr<IndexReader>* index_reader) { + assert(table != nullptr); + assert(table->get_rep()); + assert(!pin || prefetch); + assert(index_reader != nullptr); + + CachableEntry<Block> index_block; + if (prefetch || !use_cache) { + const Status s = + ReadIndexBlock(table, prefetch_buffer, ro, use_cache, + /*get_context=*/nullptr, lookup_context, &index_block); + if (!s.ok()) { + return s; + } + + if (use_cache && !pin) { + index_block.Reset(); + } + } + + index_reader->reset( + new BinarySearchIndexReader(table, std::move(index_block))); + + return Status::OK(); +} + +InternalIteratorBase<IndexValue>* BinarySearchIndexReader::NewIterator( + const ReadOptions& read_options, bool /* disable_prefix_seek */, + IndexBlockIter* iter, GetContext* get_context, + BlockCacheLookupContext* lookup_context) { + const BlockBasedTable::Rep* rep = table()->get_rep(); + const bool no_io = (read_options.read_tier == kBlockCacheTier); + CachableEntry<Block> index_block; + const Status s = + GetOrReadIndexBlock(no_io, read_options.rate_limiter_priority, + get_context, lookup_context, &index_block); + if (!s.ok()) { + if (iter != nullptr) { + iter->Invalidate(s); + return iter; + } + + return NewErrorInternalIterator<IndexValue>(s); + } + + Statistics* kNullStats = nullptr; + // We don't return pinned data from index blocks, so no need + // to set `block_contents_pinned`. + auto it = index_block.GetValue()->NewIndexIterator( + internal_comparator()->user_comparator(), + rep->get_global_seqno(BlockType::kIndex), iter, kNullStats, true, + index_has_first_key(), index_key_includes_seq(), index_value_is_full()); + + assert(it != nullptr); + index_block.TransferTo(it); + + return it; +} +} // namespace ROCKSDB_NAMESPACE |