From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?iso-8859-1?Q?Court=E8s?=) Newsgroups: gmane.lisp.guile.devel Subject: Re: [patch] subordinate SMOBs with GOOPS superclasses Date: Sun, 09 Dec 2007 18:33:37 +0100 Message-ID: <87prxfzsb2.fsf@chbouib.org> References: <8763zc3htd.fsf@pobox.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1197224428 11150 80.91.229.12 (9 Dec 2007 18:20:28 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 9 Dec 2007 18:20:28 +0000 (UTC) To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Sun Dec 09 19:20:31 2007 Return-path: Envelope-to: guile-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1J1QlT-000396-13 for guile-devel@m.gmane.org; Sun, 09 Dec 2007 19:20:31 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1J1QlB-00019o-DR for guile-devel@m.gmane.org; Sun, 09 Dec 2007 13:20:13 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1J1Ql6-00017f-Up for guile-devel@gnu.org; Sun, 09 Dec 2007 13:20:08 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1J1Ql6-00016T-EM for guile-devel@gnu.org; Sun, 09 Dec 2007 13:20:08 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1J1Ql6-00016N-3z for guile-devel@gnu.org; Sun, 09 Dec 2007 13:20:08 -0500 Original-Received: from main.gmane.org ([80.91.229.2] helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1J1Ql5-0006Kz-Ki for guile-devel@gnu.org; Sun, 09 Dec 2007 13:20:07 -0500 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1J1Qcm-0007KC-WB for guile-devel@gnu.org; Sun, 09 Dec 2007 18:11:33 +0000 Original-Received: from adh419.fdn.fr ([80.67.176.9]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 09 Dec 2007 18:11:32 +0000 Original-Received: from ludo by adh419.fdn.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 09 Dec 2007 18:11:32 +0000 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 30 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: adh419.fdn.fr X-URL: http://www.laas.fr/~lcourtes/ X-PGP-Key-ID: 0xEB1F5364 X-PGP-Key: http://www.laas.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 821D 815D 902A 7EAB 5CEE D120 7FBA 3D4F EB1F 5364 X-OS: i486-pc-linux-gnu User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux) Cancel-Lock: sha1:FNvsrGLYG+B2Xr7jHfXNtXbbYSw= X-detected-kernel: by monty-python.gnu.org: Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.devel:6922 Archived-At: Hi, Andy Wingo writes: > On Tue 27 Nov 2007 07:57, "Marco Maggi" writes: > +A special smob type is implemented to overcome the 255 limit on the > +number of smob types. Its procedures dispatch the call to procedures > +referenced by a subsmob descriptor. > > Sounds really byzantine. The tagging system has that aspect to it, yes, > but perhaps there's a point where the complexity is too much. That was my reaction too. I don't have any clear idea on how to solve it in the short term. In the longer term, my feeling is that we could have a Scheme-level FFI (in the spirit of what Jon Wilson posted some time ago [0]) that would allow the creation of subrs (aka. "primitive procedures") at run-time through a simple API. We'd have only one "SMOB" for opaque C pointers, which bindings for C libraries would wrap in structs, records or classes to provide the required type safety. I reckon it doesn't help much in the short term, but I'm a bit wary about adding more complexity to the thing. Thanks, Ludovic. [0] http://article.gmane.org/gmane.lisp.guile.user/6062 _______________________________________________ Guile-devel mailing list Guile-devel@gnu.org http://lists.gnu.org/mailman/listinfo/guile-devel