Hi Kai, again > > Having a single cleanup path would be easier, but I think in the end it > > comes down to how cleanly you can track the opened state. It seems biggest > > issue is how to cleanly track the component-substream pairs. Ideally we'd > > have a dedicated state object to represent an opened component-substream > > pair, but that's not how the APIs are defined now. But something to that > > effect is needed. > > Yeah, I can understand your concern, but not 100% yet. > In my understanding, counting start vs stop is not enough but not so bad. > If my understanding was correct, your concern is > counting only is not enough, because wrong component-substream pair > can be used, like this ? > > start(substream-A); <= > start(substream-B); > start(substream-C); > > stop(substream-Z); <= > stop(substream-B); > stop(substream-C); > > But I wonder is it really happen ? Ohh, yes indeed !! I was confused. But Hmm... I don't want to have substream list on each component... Hmm... I will re-consider it again. Thank you for your help !! Best regards --- Kuninori Morimoto