ceph/src/rocksdb/table/block_based/reader_common.h

   1 //  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5 //
   6 // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
   7 // Use of this source code is governed by a BSD-style license that can be
   8 // found in the LICENSE file. See the AUTHORS file for names of contributors.
   9 #pragma once
  10
  11 #include "rocksdb/cache.h"
  12 #include "rocksdb/table.h"
  13
  14 namespace ROCKSDB_NAMESPACE {
  15 // Release the cached entry and decrement its ref count.
  16 extern void ForceReleaseCachedEntry(void* arg, void* h);
  17
  18 inline MemoryAllocator* GetMemoryAllocator(
  19     const BlockBasedTableOptions& table_options) {
  20   return table_options.block_cache.get()
  21              ? table_options.block_cache->memory_allocator()
  22              : nullptr;
  23 }
  24
  25 inline MemoryAllocator* GetMemoryAllocatorForCompressedBlock(
  26     const BlockBasedTableOptions& table_options) {
  27   return table_options.block_cache_compressed.get()
  28              ? table_options.block_cache_compressed->memory_allocator()
  29              : nullptr;
  30 }
  31
  32 // Assumes block has a trailer as in format.h. file_name and offset provided
  33 // for generating a diagnostic message in returned status.
  34 extern Status VerifyBlockChecksum(ChecksumType type, const char* data,
  35                                   size_t block_size,
  36                                   const std::string& file_name,
  37                                   uint64_t offset);
  38 }  // namespace ROCKSDB_NAMESPACE