From: Olivier Dion via General Guile related discussions <guile-user@gnu.org>
To: Damien Mattei <damien.mattei@gmail.com>, guile-user <guile-user@gnu.org>
Subject: Re: interfacing C and guile
Date: Fri, 30 Dec 2022 11:03:08 -0500 [thread overview]
Message-ID: <871qogri9v.fsf@laura> (raw)
In-Reply-To: <CADEOadfBsL9GssH_dsM1JL2T1ajJc=JgMnPbYE8nm7rd+=zLcg@mail.gmail.com>
On Fri, 30 Dec 2022, Damien Mattei <damien.mattei@gmail.com> wrote:
> there was a mistake in my previous post, i wanted to say int cfunc
> (int,int,char *), suggestion answered to use '*:
>
> (define cfunc (foreign-library-function "libguile-cfunc" "cfunc"
> #:return-type int #:arg-types (list int int '*)))
>
> works at this step but gives an error later:
>
> (cfunc 3 27 "toto")
> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> In procedure foreign-call: Wrong type argument in position 1 (expecting
> POINTER_P): "toto"
Try (cfunc 3 27 (string->pointer "toto")). It's available in the module
(system foreign).
--
Olivier Dion
oldiob.dev
next prev parent reply other threads:[~2022-12-30 16:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-30 9:36 interfacing C and guile Damien Mattei
2022-12-30 13:48 ` Damien Mattei
2022-12-30 16:03 ` Olivier Dion via General Guile related discussions [this message]
2022-12-30 16:52 ` Damien Mattei
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=871qogri9v.fsf@laura \
--to=guile-user@gnu.org \
--cc=damien.mattei@gmail.com \
--cc=olivier.dion@polymtl.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).