1 #include <QtWidgets/QApplication>
2 #include <QSharedMemory>
3 #include <QMessageBox>
4
5 int AssumeSingleInstance(const QString &key)
6 {
7 static QSharedMemory shm(key);
8 if (shm.create(100) == false)
9 {
10 return -1;
11 }
12 return 0;
13 }
14
15 int main(int argc, char *argv[])
16 {
17 QApplication a(argc, argv);
18 //限制程序单实例运行
19 if (AssumeSingleInstance("qwatchDogService.exe") < 0)
20 {
21 QMessageBox::information(NULL, QString::fromLocal8Bit("提示"),
22 QString::fromLocal8Bit("程序已运行"));
23 return -1;
24 }
25
26 QwatchDogService w;
27 w.show();
28 return a.exec();
29 }
