[gambit-list] How can I allocate a vector in a function?

Jason Felice jason.m.felice at gmail.com
Tue Mar 26 12:16:12 EDT 2013


Cool!  Is there any kind of in depth discussion of the garbage collector,
things like ___STILL, etc.?  I remember a few mentions in the official
docs, but not enough to wrap my head around.

-Jason


On Tue, Mar 26, 2013 at 7:43 AM, Marc Feeley <feeley at iro.umontreal.ca>wrote:

>
> On 2013-03-26, at 10:17 AM, Jason Felice <jason.m.felice at gmail.com> wrote:
>
> >
> > I don't have the environment to use the ___BEGIN_ALLOC_VECTOR() macros.
> (No ___hp).
> >
> > I know the size ahead of time.  If possible, I'd like to avoid passing
> ___hp all the way down.
> >
> > Actually, this is one place where I'd love documentation - the
> environment for writing C functions and how things are protected from gc,
> etc.   I can put it together after I figure it out.
>
> Use this instead:
>
> long length = 100;
> ___SCMOBJ init = ___FAL;
> ___SCMOBJ v = ___EXT(___make_vector)(length, init, ___STILL);
>
> An alternative is to create the vector in Scheme, and pass it to C to be
> filled in using mutation.
> Marc
>
>
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