[Haskell-cafe] How to ensure code executes in the context of a specific OS thread?

[John Lato]

Message: 23

> Date: Wed, 06 Jul 2011 10:14:56 +0100
> From: Simon Marlow <marlowsd at gmail.com>
> Subject: Re: [Haskell-cafe] How to ensure code executes in the context
>        of a    specific OS thread?
> To: Jason Dagit <dagitj at gmail.com>, cvs-ghc at haskell.org,        Haskell
> Cafe
>        <haskell-cafe at haskell.org>
> Message-ID: <4E142790.8090009 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 05/07/2011 20:33, Ian Lynagh wrote:
> > On Tue, Jul 05, 2011 at 08:11:21PM +0100, Simon Marlow wrote:
> >>
> >> In GHCi it's a different matter, because the main thread is running
> >> GHCi itself, and all the expressions/statements typed at the prompt
> >> are run in forkIO'd threads (a new one for each statement, in fact).
> >> If you want a way to run command-line operations in the main thread,
> >> please submit a feature request.  I'm not sure it can be done, but
> >> I'll look into it.
> >
> > We already have a way: -fno-ghci-sandbox
>
> Aha, I'd forgotten about that!  Thanks Ian.
>
> Simon
>

IIRC a lot of people have had trouble running GUI apps from within GHCi on
OS X, whether they're GLUT, Gtk2hs, WxHaskell, or native, and several users
consider this a large obstacle.  I know that I haven't been successful with
gtk2hs.  However, at this suggestion I just tried running a gtk2hs app I'm
developing with the -fno-ghci-sandbox flag, and it worked perfectly.

Thanks very much, Ian.

John L.
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