Re: segmenation fault

[Chris Vine]

On Fri, 9 Jun 2017 10:17:18 +0200
Catonano <address@hidden> wrote:
> 2017-06-09 10:00 GMT+02:00 Amirouche Boubekki
> <address@hidden> :
> 
> >  It's something like (bytevector->pointer (make-vector)) there is a
> > make-double-pointer procedure in guile git
> 
> Thank you !!
> 
> I took a look at the guile-gcrypt code and I found
> 
> (bytevector->pointer (make-bytevector (sizeof '*))
> 
> I was going to write this right now !
> 
> It works !
> I just called freexl-open and it returned 0 !!

If you want to manipulate a scheme bytevector at the C level you can
also look at the c-write procedure here for ideas:
https://github.com/ChrisVine/guile-a-sync/blob/master/lib/unix_write.c

(As a point of detail, this procedure is only required with guile-2.0 -
with guile-2.2, suspendable ports are used instead - but it shows you
one approach to working with scheme buffers or other objects.)

Chris