From: Paolo Coletta <paolo@rcpstudio.it> Subject: Re: [boost] interest in a "signal flow" library?
Is there any interest in a library which facilitates the implementation and interconnection of objects using Boost.Signals?
Yes, much interest. [snip] I didn't look at the library yet, however, in a similar context I had the requirement to perform some operations in parallel. Thus, I wonder if this could be supported by the syntax, e.g.,
video_generator >>= ( effect1 && effect2 ) >>= image_sum >>= display
where effect1 and effect2 are executed in parallel (for example, by different threads of a thread_group); image_sum (which expects two arguments) is executed only when both effect1 and effect2 are completed.
That would be a good addition - right now you would have to do something like: video_generator >>= effect1 >>= image_sum >>= display; video_generator >>= effect2 >>= image_sum; (or) video_generator
= (effect1 >>= image_sum >>= display); = (effect2 >>= image_sum);
- both of which are more awkward than video_generator >>= ( effect1 && effect2 ) >>= image_sum >>= display. Also, image_sum would have to take care of receiving the two signals separately (which would probably require a use of slot_selector in the end) and combining them together after both are received. I'll think about this and try to add it in. Thanks! Stjepan