On Nov 28, 2007 11:30 AM, Matthew Brecknell
Even with threads, results are evaluated only when they are needed (or when forced by a strictness annotation). So the thread that needs a result (or forces it) first will be the one to evaluate it.
So does GHC implement some sychronisation given that a mutation is occuring under the covers, ie. the thunk is being replaced by the result?
Did you see Don's strict-concurrency announcement yesterday?
http://www.haskell.org/pipermail/haskell-cafe/2007-November/035292.html
Yes. I am using a TVar to build results of forked functions in. I had a quick go at changing to channels so I could use Dons library but kept getting blocking exceptions, so I have left it as is for the moment. Regards brad -- www.scoodi.com Recycle is good: Reuse is better