openPilotLog

arunguard.h
1 /*
2 *openPilot Log - A FOSS Pilot Logbook Application
3 *Copyright (C) 2020 Felix Turowsky
4 *
5 *This program is free software: you can redistribute it and/or modify
6 *it under the terms of the GNU General Public License as published by
7 *the Free Software Foundation, either version 3 of the License, or
8 *(at your option) any later version.
9 *
10 *This program is distributed in the hope that it will be useful,
11 *but WITHOUT ANY WARRANTY; without even the implied warranty of
12 *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 *GNU General Public License for more details.
14 *
15 *You should have received a copy of the GNU General Public License
16 *along with this program. If not, see <https://www.gnu.org/licenses/>.
17 */
18 #ifndef ARUNGUARD_H
19 #define ARUNGUARD_H
20
21 #include <QObject>
22 #include <QSharedMemory>
23 #include <QSystemSemaphore>
24
29 class ARunGuard
30 {
31
32 public:
33 ARunGuard(const QString &key);
34 ~ARunGuard();
35
36 bool isAnotherRunning();
37 bool tryToRun();
38 void release();
39
40 private:
41 const QString key;
42 const QString memLockKey;
43 const QString sharedmemKey;
44
45 QSharedMemory sharedMem;
46 QSystemSemaphore memLock;
47
48 Q_DISABLE_COPY(ARunGuard)
49 };
50
51
52 #endif // ARUNGUARD_H
ARunGuard
The RunGuard class ensures only a single instance of the application is running simultaneously.
Definition: arunguard.h:30