mirror of https://github.com/facebook/rocksdb.git
62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
// Copyright (c) Meta Platforms, Inc. and affiliates.
|
|
// 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 "port/port.h"
|
|
#include "rocksdb/advanced_cache.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
class ConcurrentCacheReservationManager;
|
|
|
|
// A cache interface which wraps around another cache and takes care of
|
|
// reserving space in block cache towards a single global memory limit, and
|
|
// forwards all the calls to the underlying cache.
|
|
class ChargedCache : public CacheWrapper {
|
|
public:
|
|
ChargedCache(std::shared_ptr<Cache> cache,
|
|
std::shared_ptr<Cache> block_cache);
|
|
|
|
Status Insert(
|
|
const Slice& key, ObjectPtr obj, const CacheItemHelper* helper,
|
|
size_t charge, Handle** handle = nullptr,
|
|
Priority priority = Priority::LOW, const Slice& compressed_val = Slice(),
|
|
CompressionType type = CompressionType::kNoCompression) override;
|
|
|
|
Cache::Handle* Lookup(const Slice& key, const CacheItemHelper* helper,
|
|
CreateContext* create_context,
|
|
Priority priority = Priority::LOW,
|
|
Statistics* stats = nullptr) override;
|
|
|
|
void WaitAll(AsyncLookupHandle* async_handles, size_t count) override;
|
|
|
|
bool Release(Cache::Handle* handle, bool useful,
|
|
bool erase_if_last_ref = false) override;
|
|
bool Release(Cache::Handle* handle, bool erase_if_last_ref = false) override;
|
|
|
|
void Erase(const Slice& key) override;
|
|
void EraseUnRefEntries() override;
|
|
|
|
static const char* kClassName() { return "ChargedCache"; }
|
|
const char* Name() const override { return kClassName(); }
|
|
|
|
void SetCapacity(size_t capacity) override;
|
|
|
|
inline Cache* GetCache() const { return target_.get(); }
|
|
|
|
inline ConcurrentCacheReservationManager* TEST_GetCacheReservationManager()
|
|
const {
|
|
return cache_res_mgr_.get();
|
|
}
|
|
|
|
private:
|
|
std::shared_ptr<ConcurrentCacheReservationManager> cache_res_mgr_;
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|