Client app template and ui

client/publib/runguard.h

@@ -0,0 +1,37 @@
+#ifndef RUNGUARD_H
+#define RUNGUARD_H
+
+#include <QObject>
+#include <QSharedMemory>
+#include <QSystemSemaphore>
+#include <QDebug>
+
+/**
+ * @brief The RunGuard class - The application single instance (via shared memory)
+ */
+class RunGuard
+{
+
+public:
+    static RunGuard &instance(const QString& key = QString());
+
+    ~RunGuard();
+
+    void activate();
+    bool isAnotherRunning() const;
+    bool tryToRun();
+    void release();
+
+private:
+    RunGuard(const QString& key);
+    Q_DISABLE_COPY( RunGuard )
+
+    const QString key;
+    const QString memLockKey;
+    const QString sharedmemKey;
+
+    mutable QSharedMemory sharedMem;
+    mutable QSystemSemaphore memLock;
+
+};
+#endif // RUNGUARD_H