David, On 21/03/2011, at 4:18 PM, David Barbour wrote:
> I was giving Control.Arrow a try for a reactive programming system. > The arrows are agents that communicate by sending and returning > time-varying state. Different agents may live in different 'vats' > (event-driven threads) to roughly model distributed computing. For the > most part, the state varies asynchronously - i.e. a file updates at a > different rate than the mouse position. Anyhow, I ran into a problem: > The (***) and (&&&) operations, as specified in Control.Arrow, are > inherently synchronization points. Indeed. Take a look here: http://www.haskell.org/haskellwiki/Research_papers/Monads_and_arrows#Arrows In particular, "ProdArrows -- Arrows for Fudgets" by Magnus Carlsson. cheers peter _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
