newTVarIO in the HEAD, and therefore it's in any nightly-build snapshot, which you can freely download. The next major release will be 6.6, but it's a few months off. Meanwhile I hope you can use the workaround that Tomasz posted. Simon | -----Original Message----- | From: haskell-cafe-bounces@haskell.org [mailto:haskell-cafe-bounces@haskell.org] On Behalf Of Joel | Reymont | Sent: 13 December 2005 18:08 | To: Haskell-Cafe Cafe | Subject: [Haskell-cafe] Top-level TVars | | 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. | | Thanks, Joel | | P.S. What is the ETA for 6.5? | | On Mon, Dec 05, 2005 at 10:50:13AM -0000, Simon Peyton-Jones wrote: | > | > It turns out to be easy to provide | > | > newTVarIO :: a -> IO (TVar a) | > | > which you can call from inside 'unsafePerformIO'. That means you can | > allocate top-level TVars without fuss. | > | | -- | http://wagerlabs.com/ | | | | | | _______________________________________________ | Haskell-Cafe mailing list | Haskell-Cafe@haskell.org | http://www.haskell.org/mailman/listinfo/haskell-cafe