From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Emacs design and architecture. How about copy-on-write? Date: Thu, 21 Sep 2023 11:13:42 +0300 Message-ID: <83jzsk9c5l.fsf@gnu.org> References: <83h6nrg4eg.fsf@gnu.org> <83v8c7elan.fsf@gnu.org> <877conk5ny.fsf@localhost> <83ttrreeu0.fsf@gnu.org> <87bkdzeas1.fsf@localhost> <83cyyfe5l8.fsf@gnu.org> <8734zbyu6o.fsf@dataswamp.org> <835y46e8o9.fsf@gnu.org> <87zg1ixvnc.fsf@dataswamp.org> <87il86nxts.fsf@localhost> <87o7hyx8h2.fsf@dataswamp.org> <87o7hx88ry.fsf@localhost> <87a5thta90.fsf@yahoo.com> <87led1865h.fsf@localhost> <875y45t7yo.fsf@yahoo.com> <874jjprmq2.fsf@yahoo.com> <83a5tgc03s.fsf@gnu.org> <87zg1gqr8q.fsf@yahoo.com> <83msxg9eb9.fsf@gnu.org> <87msxgq8rn.fsf@yahoo.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="17288"; mail-complaints-to="usenet@ciao.gmane.io" Cc: yantar92@posteo.net, emacs-devel@gnu.org To: Po Lu Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Sep 21 10:14:32 2023 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 1qjEpT-0004J2-6e for ged-emacs-devel@m.gmane-mx.org; Thu, 21 Sep 2023 10:14:31 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qjEok-0005M8-SM; Thu, 21 Sep 2023 04:13:47 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qjEoh-0005L2-FH for emacs-devel@gnu.org; Thu, 21 Sep 2023 04:13:43 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qjEog-0005IC-KP; Thu, 21 Sep 2023 04:13:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=WN5ChJUo+ba6SRPPPZ5ZOxzDCyHfMbDnEN8K2WOOpGc=; b=gqm5BKWgPHXP /AX672dpcwzUkznfju1T4sGkVhB8+OCCp5eIeolEAO8C6qz9Rg5XwGZwEwL1VNDSQRszx1g9ZRt3v X4IbUJjTkRLXW0pGVGcupXwaHEhIYeT/x5OVR1WBhChx2o672WWkrs2b4zIn4i6LlW7OO2azbqI// kXu6aF+9KpifNtgR+pnWlV3QVFKOyjazGDZsfxBQPgZHcIM9mDf7wuTjbPvTGZXRWjtxNnvTCc6rA Vs5v9wXehYkOk/brvIpmY9neQmKUVbVQweJuKxSKdY6lIelcVCiragRCCHRG7M9HNrr6pgR0bZsYh U4dX0TUNE8BPXNpk5BVs9w==; In-Reply-To: <87msxgq8rn.fsf@yahoo.com> (message from Po Lu on Thu, 21 Sep 2023 15:34:52 +0800) 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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:310870 Archived-At: > From: Po Lu > Cc: yantar92@posteo.net, emacs-devel@gnu.org > Date: Thu, 21 Sep 2023 15:34:52 +0800 > > Eli Zaretskii writes: > > > I'm not sure I understand: what is the difference between a global > > variable defined in C and a global variable defined, say, in > > simple.el? > > The variable defined in C must be accessible by a C lvalue. Namely, > > (*current_thread->f_Vname_of_the_variable) How is this different from (setq name-of-variable SOMETHING) done by some thread to a global variable?