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206fdea3d9
Summary: In IDE navigation I find it annoying that there are two statistics.h files (etc.) and often land on the wrong one. Here I migrate several headers to use the blah.h <- blah_impl.h <- blah.cc idiom. Although clang-format wants "blah.h" to be the top include for "blah.cc", I think overall this is an improvement. No public API changes. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11408 Test Plan: existing tests Reviewed By: ltamasi Differential Revision: D45456696 Pulled By: pdillinger fbshipit-source-id: 809d931253f3272c908cf5facf7e1d32fc507373
47 lines
1.8 KiB
C++
47 lines
1.8 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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#pragma once
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#include <string>
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#include "monitoring/statistics_impl.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_NAMESPACE {
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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 cache of serialized blocks. Size includes block trailer
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// (if applicable).
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static void InsertSerialized(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 cache of uncompressed blocks. No block trailer.
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static void InsertUncompressed(const PersistentCacheOptions& cache_options,
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const BlockHandle& handle,
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const BlockContents& contents);
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// Lookup block from cache of serialized blocks. Size includes block trailer
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// (if applicable).
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static Status LookupSerialized(const PersistentCacheOptions& cache_options,
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const BlockHandle& handle,
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std::unique_ptr<char[]>* out_data,
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const size_t expected_data_size);
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// Lookup block from uncompressed cache. No block trailer.
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static Status LookupUncompressed(const PersistentCacheOptions& cache_options,
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const BlockHandle& handle,
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BlockContents* contents);
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};
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} // namespace ROCKSDB_NAMESPACE
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