mirror of https://gitee.com/bigwinds/arangodb
101 lines
2.6 KiB
C++
101 lines
2.6 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 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 Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_MMFILES_MMFILES_COMPACTION_LOCKER_H
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#define ARANGOD_MMFILES_MMFILES_COMPACTION_LOCKER_H 1
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#include "Basics/Common.h"
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#include "MMFiles/MMFilesCollection.h"
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namespace arangodb {
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class MMFilesCompactionPreventer {
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public:
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explicit MMFilesCompactionPreventer(MMFilesCollection* collection)
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: _collection(collection) {
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_collection->preventCompaction();
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}
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~MMFilesCompactionPreventer() { _collection->allowCompaction(); }
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private:
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MMFilesCollection* _collection;
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};
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class MMFilesTryCompactionPreventer {
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public:
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explicit MMFilesTryCompactionPreventer(MMFilesCollection* collection)
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: _collection(collection), _isLocked(false) {
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_isLocked = _collection->tryPreventCompaction();
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}
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~MMFilesTryCompactionPreventer() {
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if (_isLocked) {
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_collection->allowCompaction();
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}
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}
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bool isLocked() const { return _isLocked; }
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private:
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MMFilesCollection* _collection;
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bool _isLocked;
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};
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class MMFilesCompactionLocker {
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public:
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explicit MMFilesCompactionLocker(MMFilesCollection* collection)
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: _collection(collection) {
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_collection->lockForCompaction();
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}
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~MMFilesCompactionLocker() { _collection->finishCompaction(); }
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private:
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MMFilesCollection* _collection;
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};
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class MMFilesTryCompactionLocker {
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public:
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explicit MMFilesTryCompactionLocker(MMFilesCollection* collection)
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: _collection(collection), _isLocked(false) {
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_isLocked = _collection->tryLockForCompaction();
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}
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~MMFilesTryCompactionLocker() {
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if (_isLocked) {
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_collection->finishCompaction();
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}
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}
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bool isLocked() const { return _isLocked; }
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private:
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MMFilesCollection* _collection;
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bool _isLocked;
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};
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} // namespace arangodb
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#endif
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