libcamera: object: Add connection type parameter to invokeMethod()

Allow specifying a different connection type than ConnectionTypeQueued
for Object::invokeMethod().

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

include/libcamera/object.h

@@ -30,12 +30,11 @@ public:
 	void postMessage(std::unique_ptr<Message> msg);
 
 	template<typename T, typename... Args, typename std::enable_if<std::is_base_of<Object, T>::value>::type * = nullptr>
-	void invokeMethod(void (T::*func)(Args...), Args... args)
+	void invokeMethod(void (T::*func)(Args...), ConnectionType type, Args... args)
 	{
 		T *obj = static_cast<T *>(this);
 		BoundMethodBase *method =
-			new BoundMemberMethod<T, Args...>(obj, this, func,
-							  ConnectionTypeQueued);
+			new BoundMemberMethod<T, Args...>(obj, this, func, type);
 		void *pack = new typename BoundMemberMethod<T, Args...>::PackType{ args... };
 
 		method->activatePack(pack, true);

src/android/camera_proxy.cpp

@@ -187,6 +187,7 @@ int CameraProxy::processCaptureRequest(camera3_capture_request_t *request)
 
 void CameraProxy::threadRpcCall(ThreadRpc &rpcRequest)
 {
-	cameraDevice_->invokeMethod(&CameraDevice::call, &rpcRequest);
+	cameraDevice_->invokeMethod(&CameraDevice::call, ConnectionTypeQueued,
+				    &rpcRequest);
 	rpcRequest.waitDelivery();
 }

src/libcamera/event_notifier.cpp

@@ -128,7 +128,8 @@ void EventNotifier::message(Message *msg)
 	if (msg->type() == Message::ThreadMoveMessage) {
 		if (enabled_) {
 			setEnabled(false);
-			invokeMethod(&EventNotifier::setEnabled, true);
+			invokeMethod(&EventNotifier::setEnabled,
+				     ConnectionTypeQueued, true);
 		}
 	}
 

src/libcamera/object.cpp

@@ -139,14 +139,15 @@ void Object::message(Message *msg)
 }
 
 /**
- * \fn void Object::invokeMethod(void (T::*func)(Args...), Args... args)
+ * \fn void Object::invokeMethod()
  * \brief Invoke a method asynchronously on an Object instance
  * \param[in] func The object method to invoke
+ * \param[in] type Connection type for method invocation
  * \param[in] args The method arguments
  *
- * This method invokes the member method \a func when control returns to the
- * event loop of the object's thread. The method is executed in the object's
- * thread with arguments \a args.
+ * This method invokes the member method \a func with arguments \a args, based
+ * on the connection \a type. Depending on the type, the method will be called
+ * synchronously in the same thread or asynchronously in the object's thread.
  *
  * Arguments \a args passed by value or reference are copied, while pointers
  * are passed untouched. The caller shall ensure that any pointer argument

src/libcamera/timer.cpp

@@ -170,7 +170,8 @@ void Timer::message(Message *msg)
 	if (msg->type() == Message::ThreadMoveMessage) {
 		if (isRunning()) {
 			unregisterTimer();
-			invokeMethod(&Timer::registerTimer);
+			invokeMethod(&Timer::registerTimer,
+				     ConnectionTypeQueued);
 		}
 	}
 

test/object-invoke.cpp

@@ -64,10 +64,11 @@ protected:
 		InvokedObject object;
 
 		/*
-		 * Test that method invocation in the same thread goes through
-		 * the event dispatcher.
+		 * Test that queued method invocation in the same thread goes
+		 * through the event dispatcher.
 		 */
-		object.invokeMethod(&InvokedObject::method, 42);
+		object.invokeMethod(&InvokedObject::method,
+				    ConnectionTypeQueued, 42);
 
 		if (object.status() != InvokedObject::NoCall) {
 			cerr << "Method not invoked asynchronously" << endl;
@@ -93,15 +94,16 @@ protected:
 		}
 
 		/*
-		 * Move the object to a thread and verify that the method is
-		 * delivered in the correct thread.
+		 * Move the object to a thread and verify that auto method
+		 * invocation is delivered in the correct thread.
 		 */
 		object.reset();
 		object.moveToThread(&thread_);
 
 		thread_.start();
 
-		object.invokeMethod(&InvokedObject::method, 42);
+		object.invokeMethod(&InvokedObject::method,
+				    ConnectionTypeAuto, 42);
 		this_thread::sleep_for(chrono::milliseconds(100));
 
 		switch (object.status()) {