mirror of https://gitee.com/bigwinds/arangodb
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2017 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Daniel H. Larkin
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_CACHE_TRANSACTIONAL_CACHE_H
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#define ARANGODB_CACHE_TRANSACTIONAL_CACHE_H
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#include "Basics/Common.h"
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#include "Cache/Cache.h"
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#include "Cache/CachedValue.h"
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#include "Cache/FrequencyBuffer.h"
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#include "Cache/Metadata.h"
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#include "Cache/TransactionalBucket.h"
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#include <stdint.h>
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#include <atomic>
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#include <chrono>
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#include <list>
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namespace arangodb {
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namespace cache {
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class Manager; // forward declaration
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class TransactionalCache final : public Cache {
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public:
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TransactionalCache() = delete;
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TransactionalCache(TransactionalCache const&) = delete;
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TransactionalCache& operator=(TransactionalCache const&) = delete;
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public:
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Cache::Finding find(void const* key, uint32_t keySize);
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bool insert(CachedValue* value);
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bool remove(void const* key, uint32_t keySize);
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void blackList(void const* key, uint32_t keySize);
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private:
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// main table info
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TransactionalBucket* _table;
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uint32_t _logSize;
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uint64_t _tableSize;
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uint32_t _maskShift;
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uint32_t _bucketMask;
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// auxiliary table info
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TransactionalBucket* _auxiliaryTable;
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uint32_t _auxiliaryLogSize;
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uint64_t _auxiliaryTableSize;
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uint32_t _auxiliaryMaskShift;
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uint32_t _auxiliaryBucketMask;
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// friend class manager and tasks
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friend class FreeMemoryTask;
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friend class Manager;
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friend class MigrateTask;
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private:
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// creator -- do not use constructor explicitly
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static std::shared_ptr<Cache> create(Manager* manager, uint64_t requestedSize,
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bool allowGrowth,
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bool enableWindowedStats);
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TransactionalCache(Manager* manager, uint64_t requestedLimit,
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bool allowGrowth, bool enableWindowedStats);
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~TransactionalCache();
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// management
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bool freeMemory();
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bool migrate();
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void clearTables();
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};
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}; // end namespace cache
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}; // end namespace arangodb
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#endif
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