From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Tom Tromey Newsgroups: gmane.emacs.devel Subject: Re: Using the GNU GMP Library for Bignums in Emacs Date: Sun, 08 Jul 2018 23:37:20 -0600 Message-ID: <87601pq8a7.fsf@tromey.com> References: <29f933ac-a6bf-8742-66a7-0a9d6d3e5a88@disroot.org> <83bmecy6fx.fsf@gnu.org> <0d3175d8-d996-651e-b221-71978bde3a65@cs.ucla.edu> <87tvpdnzgy.fsf@tromey.com> <4c2a814f-c254-29e5-39cf-11b5f2e5c9c8@cs.ucla.edu> <87pnzzoeky.fsf@tromey.com> <1150776f-a8fe-86a1-680b-3d1a5d582c6a@cs.ucla.edu> <87lgano9c0.fsf@tromey.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1531114559 25149 195.159.176.226 (9 Jul 2018 05:35:59 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 9 Jul 2018 05:35:59 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.50 (gnu/linux) Cc: Tom Tromey , Stefan Monnier , emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Jul 09 07:35:55 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fcOq2-0006R2-Th for ged-emacs-devel@m.gmane.org; Mon, 09 Jul 2018 07:35:55 +0200 Original-Received: from localhost ([::1]:39331 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fcOs9-00049t-LR for ged-emacs-devel@m.gmane.org; Mon, 09 Jul 2018 01:38:05 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:52253) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fcOrw-00049b-OR for emacs-devel@gnu.org; Mon, 09 Jul 2018 01:37:53 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fcOrt-0005Lx-IF for emacs-devel@gnu.org; Mon, 09 Jul 2018 01:37:52 -0400 Original-Received: from gateway20.websitewelcome.com ([192.185.53.25]:32713) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fcOrt-0005Ib-8i for emacs-devel@gnu.org; Mon, 09 Jul 2018 01:37:49 -0400 Original-Received: from cm11.websitewelcome.com (cm11.websitewelcome.com [100.42.49.5]) by gateway20.websitewelcome.com (Postfix) with ESMTP id D2677400C735A for ; Mon, 9 Jul 2018 00:37:36 -0500 (CDT) Original-Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with SMTP id cOrSfYeAFRPojcOraf8M2c; Mon, 09 Jul 2018 00:37:35 -0500 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tromey.com; s=default; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=yF/LrFRpDnUduxEee5ZYdkjEszGhLMo1+54LwKnpN6A=; b=YddLZgZbIphTm7O4kPPwFAzB9K 4mJ+n8fyL57fGJPHGPlhVgTKlHJjUV3WUbiD6DJGDBG71enittt5b8WDb+noKP9U08TaHwVbKJBQL FjI1C0nwXM64B3e/dTRw63SiJ; Original-Received: from 75-166-85-72.hlrn.qwest.net ([75.166.85.72]:44520 helo=bapiya) by box5379.bluehost.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1fcOrR-003wVT-LX; Mon, 09 Jul 2018 00:37:21 -0500 X-Attribution: Tom In-Reply-To: (Paul Eggert's message of "Fri, 6 Jul 2018 23:38:08 -0700") X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - gnu.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 75.166.85.72 X-Source-L: No X-Exim-ID: 1fcOrR-003wVT-LX X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 75-166-85-72.hlrn.qwest.net (bapiya) [75.166.85.72]:44520 X-Source-Auth: tom+tromey.com X-Email-Count: 3 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 192.185.53.25 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:227143 Archived-At: >>>>> "Paul" == Paul Eggert writes: >> I still haven't looked at using the mpn_ API. Paul> We need to do that before installing this in master, as Emacs must be Paul> in charge of bignum storage allocation. But it isn't needed for a Paul> first cut. I looked into this a little. The mpn API seems very hard to use. Using it would mean reimplementing many of the functions provided by GMP. On the other hand, I see that Guile is using the mpz API. So, maybe in practice it is safe enough to just set custom allocation functions and let them throw. Tom