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39 lines
821 B
39 lines
821 B
9 years ago
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/****************************************************************************
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*
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* (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
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*
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* QGroundControl is licensed according to the terms in the file
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* COPYING.md in the root of the source code directory.
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*
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****************************************************************************/
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#ifndef RunGuard_H
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#define RunGuard_H
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#include <QObject>
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#include <QSharedMemory>
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#include <QSystemSemaphore>
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class RunGuard
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{
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public:
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RunGuard( const QString& key );
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~RunGuard();
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bool isAnotherRunning();
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bool tryToRun();
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void release();
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private:
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const QString key;
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const QString memLockKey;
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const QString sharedmemKey;
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QSharedMemory sharedMem;
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QSystemSemaphore memLock;
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Q_DISABLE_COPY( RunGuard )
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};
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#endif
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