test: event-thread: Destroy Object from correct thread context

The EventHandler used in the test is destroyed from the main thread,
which is invalid for a thread-bound object bound to a different thread.
Fix it by destroying it with deleteLater().

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>

test/event-thread.cpp

@@ -85,10 +85,17 @@ private:
 class EventThreadTest : public Test
 {
 protected:
+	int init()
+	{
+		thread_.start();
+
+		handler_ = new EventHandler();
+
+		return TestPass;
+	}
+
 	int run()
 	{
-		Thread thread;
-		thread.start();
 
 		/*
 		 * Fire the event notifier and then move the notifier to a
@@ -98,23 +105,33 @@ protected:
 		 * different thread will correctly process already pending
 		 * events in the new thread.
 		 */
-		EventHandler handler;
+		handler_->notify();
-		handler.notify();
+		handler_->moveToThread(&thread_);
-		handler.moveToThread(&thread);
 
 		this_thread::sleep_for(chrono::milliseconds(100));
 
-		/* Must stop thread before destroying the handler. */
+		if (!handler_->notified()) {
-		thread.exit(0);
-		thread.wait();
-
-		if (!handler.notified()) {
 			cout << "Thread event handling test failed" << endl;
 			return TestFail;
 		}
 
 		return TestPass;
 	}
+
+	void cleanup()
+	{
+		/*
+		 * Object class instances must be destroyed from the thread
+		 * they live in.
+		 */
+		handler_->deleteLater();
+		thread_.exit(0);
+		thread_.wait();
+	}
+
+private:
+	EventHandler *handler_;
+	Thread thread_;
 };
 
 TEST_REGISTER(EventThreadTest)