mirror of https://gitee.com/bigwinds/arangodb
125 lines
4.4 KiB
C++
125 lines
4.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief collection write locker
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 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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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_UTILS_COLLECTION_WRITE_LOCKER_H
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#define ARANGODB_UTILS_COLLECTION_WRITE_LOCKER_H 1
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#include "Basics/Common.h"
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#include "VocBase/document-collection.h"
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namespace triagens {
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namespace arango {
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// -----------------------------------------------------------------------------
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// --SECTION-- class CollectionWriteLocker
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// -----------------------------------------------------------------------------
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class CollectionWriteLocker {
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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public:
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CollectionWriteLocker (CollectionWriteLocker const&) = delete;
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CollectionWriteLocker& operator= (CollectionWriteLocker const&) = delete;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create the locker
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////////////////////////////////////////////////////////////////////////////////
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CollectionWriteLocker (TRI_document_collection_t* document,
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bool doLock)
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: _document(document),
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_doLock(false) {
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if (doLock) {
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_document->beginWrite(_document);
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_doLock = true;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destroy the locker
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////////////////////////////////////////////////////////////////////////////////
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~CollectionWriteLocker () {
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unlock();
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief release the lock
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////////////////////////////////////////////////////////////////////////////////
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inline void unlock () {
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if (_doLock) {
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_document->endWrite(_document);
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_doLock = false;
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}
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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// -----------------------------------------------------------------------------
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief collection pointer
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////////////////////////////////////////////////////////////////////////////////
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TRI_document_collection_t* _document;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief lock flag
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////////////////////////////////////////////////////////////////////////////////
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bool _doLock;
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};
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}
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}
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#endif
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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