Specifies the type of function passed to Bus.addWatch or Bus.addWatchFull, which is called from the mainloop when a message is available on the bus.

The message passed to the function will be unreffed after execution of this function so it should not be freed in the function.

Note that this function is used as a GSourceFunc which means that returning FALSE will remove the GSource from the mainloop.

alias GstBusFunc = int function(GstBus* bus, GstMessage* message, void* userData)

Return Value

FALSE if the event source should be removed.