On 13 December 2005 18:34, Tomasz Zielonka wrote: > On Tue, Dec 13, 2005 at 06:08:23PM +0000, Joel Reymont wrote: >> Can this be done now or is this a GHC 6.5 feature? >> >> My combination of unsafePerformIO with atomically $ newTVar does not >> seem to be working. > > Here is an example how you can initialize a top-level STM variable. > http://www.uncurry.com/repos/TimeVar/TimeVar.hs > It just forks a new thread inside unsafePerformIO, it runs > "atomically" in it and passes the result through ordinary MVar.
A cheaper way is just to seq the top-level TVar at the beginning of Main.main. Cheers, Simon _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe