From: hemant <gethemant@...>
Date: 2007-09-21T02:02:03+09:00
Subject: Re: Do C Extensions Block Ruby?

On 9/20/07, Ilmari Heikkinen <ilmari.heikkinen@gmail.com> wrote:
> On 9/20/07, Wayne E. Seguin <wayneeseguin@gmail.com> wrote:
> > On Sep 19, 2007, at 17:15 , Joel VanderWerf wrote:
> > > ...except when you call back into ruby from your C code (right?).
> > > Then the thread scheduler could get a chance to do its thing.
> > Joel,
> >
> > Thank you for the response.
> >
> > How do you call back? Is that the rb_thread_schedule() method?
>
> Or rb_funcall(). Basically any call that executes ruby code.
>

rb_funcall() is slow as shit, avoid it if you can.


> Ran into an "interesting" bug with a C extension once with
> this: I used a global scratchpad on the C side and did ruby calls
> from C to log stuff. Which let other ruby threads hit the C side and
> screw up the scratchpad. Resulting in some messed up images.
>
>


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