d616ebea23
Summary: Closes https://github.com/facebook/rocksdb/pull/2226 Differential Revision: D4967547 Pulled By: siying fbshipit-source-id: dd3b58ae1e7a106ab6bb6f37ab5c88575b125ab4
47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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// This source code is also licensed under the GPLv2 license found in the
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// COPYING file in the root directory of this source tree.
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#pragma once
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#include <string>
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#include "monitoring/statistics.h"
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#include "table/format.h"
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#include "table/persistent_cache_options.h"
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namespace rocksdb {
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struct BlockContents;
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// PersistentCacheHelper
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//
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// Encapsulates some of the helper logic for read and writing from the cache
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class PersistentCacheHelper {
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public:
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// insert block into raw page cache
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static void InsertRawPage(const PersistentCacheOptions& cache_options,
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const BlockHandle& handle, const char* data,
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const size_t size);
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// insert block into uncompressed cache
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static void InsertUncompressedPage(
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const PersistentCacheOptions& cache_options, const BlockHandle& handle,
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const BlockContents& contents);
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// lookup block from raw page cacge
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static Status LookupRawPage(const PersistentCacheOptions& cache_options,
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const BlockHandle& handle,
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std::unique_ptr<char[]>* raw_data,
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const size_t raw_data_size);
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// lookup block from uncompressed cache
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static Status LookupUncompressedPage(
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const PersistentCacheOptions& cache_options, const BlockHandle& handle,
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BlockContents* contents);
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};
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} // namespace rocksdb
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