mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-25 22:44:05 +00:00
d7b8756976
Summary: `-Wextra-semi` or `-Wextra-semi-stmt` If the code compiles, this is safe to land. Reviewed By: palmje Differential Revision: D54362208 fbshipit-source-id: a47acd4c794c899fccb65285b116b50d9566ea12
111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
// 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).
|
|
|
|
#include "table/persistent_cache_helper.h"
|
|
|
|
#include "table/block_based/block_based_table_reader.h"
|
|
#include "table/format.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
const PersistentCacheOptions PersistentCacheOptions::kEmpty;
|
|
|
|
void PersistentCacheHelper::InsertSerialized(
|
|
const PersistentCacheOptions& cache_options, const BlockHandle& handle,
|
|
const char* data, const size_t size) {
|
|
assert(cache_options.persistent_cache);
|
|
assert(cache_options.persistent_cache->IsCompressed());
|
|
|
|
CacheKey key =
|
|
BlockBasedTable::GetCacheKey(cache_options.base_cache_key, handle);
|
|
|
|
cache_options.persistent_cache->Insert(key.AsSlice(), data, size)
|
|
.PermitUncheckedError();
|
|
}
|
|
|
|
void PersistentCacheHelper::InsertUncompressed(
|
|
const PersistentCacheOptions& cache_options, const BlockHandle& handle,
|
|
const BlockContents& contents) {
|
|
assert(cache_options.persistent_cache);
|
|
assert(!cache_options.persistent_cache->IsCompressed());
|
|
// Precondition:
|
|
// (1) content is cacheable
|
|
// (2) content is not compressed
|
|
|
|
CacheKey key =
|
|
BlockBasedTable::GetCacheKey(cache_options.base_cache_key, handle);
|
|
|
|
cache_options.persistent_cache
|
|
->Insert(key.AsSlice(), contents.data.data(), contents.data.size())
|
|
.PermitUncheckedError();
|
|
}
|
|
|
|
Status PersistentCacheHelper::LookupSerialized(
|
|
const PersistentCacheOptions& cache_options, const BlockHandle& handle,
|
|
std::unique_ptr<char[]>* out_data, const size_t expected_data_size) {
|
|
#ifdef NDEBUG
|
|
(void)expected_data_size;
|
|
#endif
|
|
assert(cache_options.persistent_cache);
|
|
assert(cache_options.persistent_cache->IsCompressed());
|
|
|
|
CacheKey key =
|
|
BlockBasedTable::GetCacheKey(cache_options.base_cache_key, handle);
|
|
|
|
size_t size;
|
|
Status s =
|
|
cache_options.persistent_cache->Lookup(key.AsSlice(), out_data, &size);
|
|
if (!s.ok()) {
|
|
// cache miss
|
|
RecordTick(cache_options.statistics, PERSISTENT_CACHE_MISS);
|
|
return s;
|
|
}
|
|
|
|
// cache hit
|
|
// Block-based table is assumed
|
|
assert(expected_data_size ==
|
|
handle.size() + BlockBasedTable::kBlockTrailerSize);
|
|
assert(size == expected_data_size);
|
|
RecordTick(cache_options.statistics, PERSISTENT_CACHE_HIT);
|
|
return Status::OK();
|
|
}
|
|
|
|
Status PersistentCacheHelper::LookupUncompressed(
|
|
const PersistentCacheOptions& cache_options, const BlockHandle& handle,
|
|
BlockContents* contents) {
|
|
assert(cache_options.persistent_cache);
|
|
assert(!cache_options.persistent_cache->IsCompressed());
|
|
if (!contents) {
|
|
// We shouldn't lookup in the cache. Either
|
|
// (1) Nowhere to store
|
|
return Status::NotFound();
|
|
}
|
|
|
|
CacheKey key =
|
|
BlockBasedTable::GetCacheKey(cache_options.base_cache_key, handle);
|
|
|
|
std::unique_ptr<char[]> data;
|
|
size_t size;
|
|
Status s =
|
|
cache_options.persistent_cache->Lookup(key.AsSlice(), &data, &size);
|
|
if (!s.ok()) {
|
|
// cache miss
|
|
RecordTick(cache_options.statistics, PERSISTENT_CACHE_MISS);
|
|
return s;
|
|
}
|
|
|
|
// please note we are potentially comparing compressed data size with
|
|
// uncompressed data size
|
|
assert(handle.size() <= size);
|
|
|
|
// update stats
|
|
RecordTick(cache_options.statistics, PERSISTENT_CACHE_HIT);
|
|
// construct result and return
|
|
*contents = BlockContents(std::move(data), size);
|
|
return Status::OK();
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|