From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: master 3ed79cd: Separate bytecode stack Date: Tue, 15 Mar 2022 15:29:45 -0400 Message-ID: References: <83lexdlpjy.fsf@gnu.org> <447E1D53-FA02-4776-9730-507BCA1993FA@acm.org> <83h781lma9.fsf@gnu.org> <1EB42282-A67C-4C20-8E5D-BA8DA9A21E9C@acm.org> <83a6dsjw12.fsf@gnu.org> <210D2D02-9086-4DB5-8015-120E07489974@acm.org> <83k0cvi8g6.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21860"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: Mattias =?windows-1252?Q?Engdeg=E5rd?= , emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Mar 15 20:31:17 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nUCt2-0005W4-Jn for ged-emacs-devel@m.gmane-mx.org; Tue, 15 Mar 2022 20:31:16 +0100 Original-Received: from localhost ([::1]:50362 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nUCt1-0003R6-Et for ged-emacs-devel@m.gmane-mx.org; Tue, 15 Mar 2022 15:31:15 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:37716) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nUCrn-0002Co-N8 for emacs-devel@gnu.org; Tue, 15 Mar 2022 15:29:59 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:38764) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nUCrj-0005cn-VK; Tue, 15 Mar 2022 15:29:58 -0400 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 4CB5A441C12; Tue, 15 Mar 2022 15:29:52 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id DEB60441C0E; Tue, 15 Mar 2022 15:29:46 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1647372586; bh=9DonX4xaTciArSbF+vonTVTPfT9aUPy/Kj/grqVUuf4=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=MKofl3+iA0GeYrn2yPhgxuz3KOxUqaxGMY1TFXsUA0HjagGQ/6vlIUF3u7QsqEDW/ BYtq2MouRH55+iy3R1whfED3fuQRuEB0Ac79iU0NMob5f2Hi17iB9zbek7yPFcrCUH nUo3m43I4kbTtKovorRi7KWuxaTprSlZ18azqYT0+uJMACK+TkdqKpw4QtTCySIIqg EWCszx0qJX0y650+iuvrCdzqDvCBQTukOYnnWN547hgPm4zDqELg+QZZdOdeEv8HGz d1VsT8hKvlQh9tNwp6uoK6dTKPDHRJvVSlBAh86hsTdYW+n3FPpX+NYw6xiqn/2BdY IeXa2d7b0Ja6g== Original-Received: from ceviche (unknown [192.64.131.5]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id A29B3120376; Tue, 15 Mar 2022 15:29:46 -0400 (EDT) In-Reply-To: <83k0cvi8g6.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 15 Mar 2022 16:42:01 +0200") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:287201 Archived-At: Eli Zaretskii [2022-03-15 16:42:01] wrote: >> From: Mattias Engdeg=E5rd >> Date: Tue, 15 Mar 2022 15:20:29 +0100 >> Cc: Emacs-Devel >>=20 >> >> The latter alternative would become a little more palatable if we cou= ld use flexible array struct members on all platforms. Given that we assume= C99, can we do that now? >> >=20 >> > What do you mean by "flexible array struct members"? Please show a >> > code snippet. >>=20 >> I'm sure you know it well, it's the ability to put an incomplete array >> declaration as the last member of a struct, as in: >>=20 >> struct S { int n; float a[]; }; >>=20 >> which roughly means the same thing as declaring that array to be of size= zero. >> It's not required in our case but would make the next_stack function (se= e patch) go away. > > I think you can use this (we already use it elsewhere in Emacs). AFAICT we usually use: struct Lisp_Vector { union vectorlike_header header; Lisp_Object contents[FLEXIBLE_ARRAY_MEMBER]; } GCALIGNED_STRUCT; but I suspect that by now we don't need this compatibility hack. Stefan