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3cacd4b4ec
Summary: The definition of the Cache class should not be needed by the vast majority of RocksDB users, so I think it is just distracting to include it in cache.h, which is primarily needed for configuring and creating caches. This change moves the class to a new header advanced_cache.h. It is just cut-and-paste except for modifying the class API comment. In general, operations on shared_ptr<Cache> should continue to work when only a forward declaration of Cache is available, as long as all the Cache instances provided are already shared_ptr. See https://stackoverflow.com/a/17650101/454544 Also, the most common way to customize a Cache is by wrapping an existing implementation, so it makes sense to provide CacheWrapper in the public API. This was a cut-and-paste job except removing the implementation of Name() so that derived classes must provide it. Intended follow-up: consolidate Release() into one function to reduce customization bugs / confusion Pull Request resolved: https://github.com/facebook/rocksdb/pull/11192 Test Plan: `make check` Reviewed By: anand1976 Differential Revision: D43055487 Pulled By: pdillinger fbshipit-source-id: 7b05492df35e0f30b581b4c24c579bc275b6d110
32 lines
1.3 KiB
C++
32 lines
1.3 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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#pragma once
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#include "rocksdb/advanced_cache.h"
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#include "rocksdb/table.h"
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namespace ROCKSDB_NAMESPACE {
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// Release the cached entry and decrement its ref count.
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extern void ForceReleaseCachedEntry(void* arg, void* h);
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inline MemoryAllocator* GetMemoryAllocator(
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const BlockBasedTableOptions& table_options) {
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return table_options.block_cache.get()
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? table_options.block_cache->memory_allocator()
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: nullptr;
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}
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// Assumes block has a trailer as in format.h. file_name and offset provided
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// for generating a diagnostic message in returned status.
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extern Status VerifyBlockChecksum(ChecksumType type, const char* data,
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size_t block_size,
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const std::string& file_name,
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uint64_t offset);
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} // namespace ROCKSDB_NAMESPACE
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