matrixion/include/RunGuard.h
2017-12-14 21:55:00 +02:00

31 lines
588 B
C++

#pragma once
//
// Taken from
// https://stackoverflow.com/questions/5006547/qt-best-practice-for-a-single-instance-app-protection
//
#include <QObject>
#include <QSharedMemory>
#include <QSystemSemaphore>
class RunGuard
{
public:
RunGuard(const QString &key);
~RunGuard();
bool isAnotherRunning();
bool tryToRun();
void release();
private:
const QString key;
const QString memLockKey;
const QString sharedmemKey;
QSharedMemory sharedMem;
QSystemSemaphore memLock;
Q_DISABLE_COPY(RunGuard)
};