[Haskell-cafe] Top-level TVars

Tomasz Zielonka tomasz.zielonka at gmail.com
Tue Dec 13 13:34:21 EST 2005

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.
It just forks a new thread inside unsafePerformIO, it runs "atomically"
in it and passes the result through ordinary MVar.

Best regards

I am searching for a programmer who is good at least in some of
[Haskell, ML, C++, Linux, FreeBSD, math] for work in Warsaw, Poland

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