Fix restart behavior:

- fix crash.
- exit on last window closed.
- add return staus code for later use.

Linphone/core/App.cpp

@@ -86,6 +86,7 @@ void App::init() {
 		qDebug() << "[App] Starting Thread";
 		mLinphoneThread->start();
 	}
+	setQuitOnLastWindowClosed(true); // TODO: use settings to set it
 
 	// QML
 	mEngine = new QQmlApplicationEngine(this);
@@ -148,6 +149,10 @@ void App::initCppInterfaces() {
 
 void App::clean() {
 	// Wait 500ms to let time for log te be stored.
+	delete mNotifier;
+	mNotifier = nullptr;
+	delete mEngine;
+	mEngine = nullptr;
 	mLinphoneThread->wait(250);
 	qApp->processEvents(QEventLoop::AllEvents, 250);
 	mLinphoneThread->exit();

Linphone/core/App.hpp

@@ -76,6 +76,8 @@ public:
 	QQmlApplicationEngine *mEngine = nullptr;
 	bool notify(QObject *receiver, QEvent *event);
 
+	enum class StatusCode { gRestartCode = 1000, gDeleteDataCode = 1001 };
+
 private:
 	void createCommandParser();
 

Linphone/core/notifier/Notifier.cpp

@@ -118,9 +118,11 @@ Notifier::~Notifier() {
 	delete mMutex;
 
 	const int nComponents = Notifications.size();
+	if (mComponents) {
 		for (int i = 0; i < nComponents; ++i)
-		mComponents[i]->deleteLater();
+			if (mComponents[i]) mComponents[i]->deleteLater();
 		delete[] mComponents;
+	}
 }
 
 // -----------------------------------------------------------------------------

Linphone/main.cpp

@@ -46,9 +46,10 @@ int main(int argc, char *argv[]) {
 #endif
 
 	int result = 0;
-	while (result >= 0) {
+	do {
 		result = app.exec();
-	}
+	} while (result == (int)App::StatusCode::gRestartCode);
+	qWarning() << "[Main] Exiting app with the code : " << result;
 	app.clean();
 	return result;
 }

Linphone/tool/thread/Thread.cpp

@@ -44,7 +44,8 @@ bool Thread::mustBeInLinphoneThread(const QString &context) {
 }
 
 bool Thread::mustBeInMainThread(const QString &context) {
-	bool isMainThread = QThread::currentThread() == App::getInstance()->thread();
+	if (!qApp) return true;
+	bool isMainThread = QThread::currentThread() == qApp->thread();
 	if (!isMainThread) qCritical() << "[Thread] Not processing in Main thread from " << context;
 	return isMainThread;
 }