Re: [Haskell-cafe] STM and random numbers

On 1/12/07, Chad Scherrer wrote:

Hi,

I'd like to be able to use randomIO, but I'm working within the context of STM. Is there a way to get these working together happily?

For now, I guess I could kludgingly use unsafePerformIO inside STM (it's the other way around that's not allowed, right?), but I would need to be sure it doesn't get inlined.

You could use GHC.Conc.unsafeIOToSTM. Just be aware that your transaction may be re-executed an arbitrary number of times. -- Cheers, Lemmih