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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/index_reader_common.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 '')
-rw-r--r-- | src/rocksdb/table/block_based/index_reader_common.cc | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/rocksdb/table/block_based/index_reader_common.cc b/src/rocksdb/table/block_based/index_reader_common.cc new file mode 100644 index 000000000..6584586c9 --- /dev/null +++ b/src/rocksdb/table/block_based/index_reader_common.cc @@ -0,0 +1,56 @@ +// 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/index_reader_common.h" + +namespace ROCKSDB_NAMESPACE { +Status BlockBasedTable::IndexReaderCommon::ReadIndexBlock( + const BlockBasedTable* table, FilePrefetchBuffer* prefetch_buffer, + const ReadOptions& read_options, bool use_cache, GetContext* get_context, + BlockCacheLookupContext* lookup_context, + CachableEntry<Block>* index_block) { + PERF_TIMER_GUARD(read_index_block_nanos); + + assert(table != nullptr); + assert(index_block != nullptr); + assert(index_block->IsEmpty()); + + const Rep* const rep = table->get_rep(); + assert(rep != nullptr); + + const Status s = table->RetrieveBlock( + prefetch_buffer, read_options, rep->footer.index_handle(), + UncompressionDict::GetEmptyDict(), index_block, BlockType::kIndex, + get_context, lookup_context, /* for_compaction */ false, use_cache, + /* wait_for_cache */ true, /* async_read */ false); + + return s; +} + +Status BlockBasedTable::IndexReaderCommon::GetOrReadIndexBlock( + bool no_io, Env::IOPriority rate_limiter_priority, GetContext* get_context, + BlockCacheLookupContext* lookup_context, + CachableEntry<Block>* index_block) const { + assert(index_block != nullptr); + + if (!index_block_.IsEmpty()) { + index_block->SetUnownedValue(index_block_.GetValue()); + return Status::OK(); + } + + ReadOptions read_options; + read_options.rate_limiter_priority = rate_limiter_priority; + if (no_io) { + read_options.read_tier = kBlockCacheTier; + } + + return ReadIndexBlock(table_, /*prefetch_buffer=*/nullptr, read_options, + cache_index_blocks(), get_context, lookup_context, + index_block); +} +} // namespace ROCKSDB_NAMESPACE |