Mercurial > hg > syntilista

comparison src/runguard.h @ 228:37d5f4329449

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Implement single running instance check to prevent problems with the SQLite database.
author Matti Hamalainen <ccr@tnsp.org>
date Tue, 20 Mar 2018 13:45:21 +0200
parents
children
comparison
equal deleted inserted replaced
227:07e7f254ef16 228:37d5f4329449
1 //
2 // Taken and modified from https://stackoverflow.com/questions/5006547/qt-best-practice-for-a-single-instance-app-protection
3 //
4 #ifndef RUNGUARD_H
5 #define RUNGUARD_H
6
7 #include <QObject>
8 #include <QSharedMemory>
9 #include <QSystemSemaphore>
10
11
12 class RunGuard
13 {
14
15 public:
16 RunGuard(const QString &key);
17 ~RunGuard();
18
19 bool isAnotherRunning();
20 bool tryToRun();
21 void release();
22
23 private:
24 const QString key;
25 const QString memLockKey;
26 const QString sharedmemKey;
27
28 QSharedMemory sharedMem;
29 QSystemSemaphore memLock;
30
31 Q_DISABLE_COPY(RunGuard)
32 };
33
34
35 #endif // RUNGUARD_H