> > ## Design and implement some solution for select / async events > > We need a way to efficiently wait on multiple types of events at once, > including port receives, I/O reads, socket accepts, timers. This has some > very complicated requirements to satisfy, as detailed in the linked issue, > and I'm not sure what the right abstractions are here. This is super > important and the biggest risk to the whole effort. If anybody has opinions > about this topic I would love to hear them. > > https://github.com/mozilla/**rust/issues/6842<https://github.com/mozilla/rust/issues/6842>
My 2 cents worth nothing :-) and I've replied inside the issue with the same idea... It seems to be very similar in tone to what Vadim described for .NET asyncs where you wait for a timeout or all operations (steps) to complete from an abstract view. This idea comes out of the Data Architect world that I live in. It's more along the lines of that basic idea that your pitching which I call "receivership". In Pentaho Data Integration, there is a process step called "Block this step until steps finish". What it does is Block a single step in an execution flow until a selected step or even multiple steps somewhere in the chain or process has completed it's execution and returned a True for it's "execution complete flag" where a launched listener is waiting and watching. It's a generic wrapper if you will, for additional next steps to perform, but those next steps do not get called, do not get any input, and no variables are passed to them until the child Blocking step has seen from (there's a listener process launched for each step or steps choosen to watch) all its parent or parents steps somewhere say that it's own execution has finished and lets the listener know. I think the "Block this step until steps finish" just waits for all those listeners it is watching to say it's OK to proceed with it's own set of next steps. -- -Thad http://www.freebase.com/view/en/thad_guidry
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