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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
commite6918187568dbd01842d8d1d2c808ce16a894239 (patch)
tree64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/table/persistent_cache_helper.h
parentInitial commit. (diff)
downloadceph-upstream/18.2.2.tar.xz
ceph-upstream/18.2.2.zip
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/rocksdb/table/persistent_cache_helper.h')
-rw-r--r--src/rocksdb/table/persistent_cache_helper.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/rocksdb/table/persistent_cache_helper.h b/src/rocksdb/table/persistent_cache_helper.h
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+++ b/src/rocksdb/table/persistent_cache_helper.h
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+// 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).
+#pragma once
+
+#include <string>
+
+#include "monitoring/statistics.h"
+#include "table/format.h"
+#include "table/persistent_cache_options.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+struct BlockContents;
+
+// PersistentCacheHelper
+//
+// Encapsulates some of the helper logic for read and writing from the cache
+class PersistentCacheHelper {
+ public:
+ // Insert block into cache of serialized blocks. Size includes block trailer
+ // (if applicable).
+ static void InsertSerialized(const PersistentCacheOptions& cache_options,
+ const BlockHandle& handle, const char* data,
+ const size_t size);
+
+ // Insert block into cache of uncompressed blocks. No block trailer.
+ static void InsertUncompressed(const PersistentCacheOptions& cache_options,
+ const BlockHandle& handle,
+ const BlockContents& contents);
+
+ // Lookup block from cache of serialized blocks. Size includes block trailer
+ // (if applicable).
+ static Status LookupSerialized(const PersistentCacheOptions& cache_options,
+ const BlockHandle& handle,
+ std::unique_ptr<char[]>* out_data,
+ const size_t expected_data_size);
+
+ // Lookup block from uncompressed cache. No block trailer.
+ static Status LookupUncompressed(const PersistentCacheOptions& cache_options,
+ const BlockHandle& handle,
+ BlockContents* contents);
+};
+
+} // namespace ROCKSDB_NAMESPACE