mirror of https://gitee.com/bigwinds/arangodb
78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2017 ArangoDB 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 Simon Grätzer
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_ROCKSDB_ENGINE_BACKGROUND_H
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#define ARANGOD_ROCKSDB_ENGINE_BACKGROUND_H 1
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#include "Basics/Common.h"
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#include "Basics/ConditionVariable.h"
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#include "Basics/Thread.h"
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namespace arangodb {
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class RocksDBEngine;
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class RocksDBBackgroundThread final : public Thread {
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public:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief engine pointer
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//////////////////////////////////////////////////////////////////////////////
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RocksDBEngine* _engine;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief interval in which we will run
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//////////////////////////////////////////////////////////////////////////////
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double const _interval;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief condition variable for heartbeat
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//////////////////////////////////////////////////////////////////////////////
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arangodb::basics::ConditionVariable _condition;
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RocksDBBackgroundThread(RocksDBEngine* eng, double interval);
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~RocksDBBackgroundThread();
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void beginShutdown() override;
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/// disable pruning of wal files
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void disableWalFilePruning(bool disable) {
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int sub = 0;
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if (disable) {
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sub = _disableWalFilePruning.fetch_add(1);
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} else {
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sub = _disableWalFilePruning.fetch_sub(1);
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}
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TRI_ASSERT(sub >= 0);
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}
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bool disableWalFilePruning() const {
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return _disableWalFilePruning.load(std::memory_order_acquire) > 0;
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}
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protected:
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void run() override;
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std::atomic<int> _disableWalFilePruning;
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};
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} // namespace arangodb
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#endif
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