Hi, I am currently building a software component that does stream processing in a dataflow like scheme (i.e. data flows through a network of algorithm blocks, much like in simulink, if you know matlab). I am currently implementing it all using qt signals and slots, since this allows me to push parts off to different threads, and qt magically handles the event generation. i.e. when I connect across threads instead of directly invoking the slot qt will generate an event in the receivers thread's eventloop (such eventloops are automatically generated for all QThreads). Now I am a bit frutrated by the hackishnes of the qt preprocessor (moc) that implements the signal/slot magic, as it does not compute with templates and typedefs, making my code unneccesarily verbose. So I was wondering how easy/hard it would be to implement such a thing with boost? I nknow there is signals2, but that does not implement the message passing scheme I want, instead it just savely calls slot directly. In terms of event-loops there is boost asio, right? Is there a sane way to combine these? It would be great as I think this kind of scheme can be used in many places. Best Daniel