[Haskell-cafe] Re: Threading and FFI

[Simon Marlow]

On 20/02/2010 09:52, Maciej Piechotka wrote:
> Sorry I start spin-off of thread but all over the haskell code is idiom:
>
> throwErrorIfMinus1_ $ someCode args
>
> However this code is dependent on errno, which is thread dependent. Is
> GHC making sure that errno set from C call is propagated back into
> correct thread?

Yes, it is.

> Are there any requirements regarding safeness/unsafeness of such
> propagation

No there aren't.

Cheers,
	Simon