From: ludo@gnu.org (Ludovic Courtès)
To: guile-devel@gnu.org
Subject: Re: scm_to_pointer vs scm->pointer
Date: Tue, 03 Jul 2012 23:47:26 +0200 [thread overview]
Message-ID: <871uksms9d.fsf@gnu.org> (raw)
In-Reply-To: 871uktsv1n.fsf@pobox.com
Heya!
Andy Wingo <wingo@pobox.com> skribis:
> scm->pointer takes a Scheme value and returns a Scheme value which is a
> foreign pointer to the Scheme value. It has been in Guile since 2.0 I
> think.
v2.0.0-105-g148c331, apparently.
> scm_to_pointer takes a Scheme value which is a foreign pointer, and
> unpacks that foregin pointer as a void*.
>
> scm_to_pointer is a new interface in master that is not in 2.0.5,
Yes. ‘scm_from_pointer’ is pre-2.0.0.
> and that is inconsistent with scm->pointer / scm_scm_to_pointer.
Yes, but it’s consistent with the other scm_{to,from} functions.
> This should be fixed. Otherwise it's impossible to document in any
> sane fashion.
>
> Suggestion: change scm_to_pointer to SCM_POINTER_VALUE. WDYT?
I’m happy with this change. Mark?
(Back then, I was skeptical about the usefulness of the C pointer API.
I have since used ‘SCM_POINTER_VALUE’ and ‘scm_from_pointer’ in
Guile-GCC, which uses a mixed dynamic/static FFI, and for good reasons.)
Thanks,
Ludo’.
next prev parent reply other threads:[~2012-07-03 21:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-02 21:38 scm_to_pointer vs scm->pointer Andy Wingo
2012-07-03 21:47 ` Ludovic Courtès [this message]
2012-07-04 15:35 ` Andy Wingo
2012-07-05 16:11 ` Ludovic Courtès
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