From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Ihor Radchenko Newsgroups: gmane.emacs.devel Subject: Re: Concurrency via isolated process/thread Date: Fri, 07 Jul 2023 12:42:40 +0000 Message-ID: <87ttufc2pr.fsf@localhost> References: <871qhnr4ty.fsf@localhost> <83v8ezk3cj.fsf@gnu.org> <87v8ezpov0.fsf@localhost> <83r0pnk2az.fsf@gnu.org> <87pm57pns8.fsf@localhost> <87lefvp55t.fsf@yahoo.com> <87sfa28ura.fsf@localhost> <87cz16o8vz.fsf@yahoo.com> <87jzve8r4m.fsf@localhost> <871qhmo5nv.fsf@yahoo.com> <87bkgq8p5t.fsf@localhost> <831qhmjwk0.fsf@gnu.org> <875y6y8nlr.fsf@localhost> <87h6qhnalc.fsf@yahoo.com> <87ilax71wo.fsf@localhost> <831qhli14t.fsf@gnu.org> <87wmzdxewc.fsf@localhost> <83r0plgjeo.fsf@gnu.org> <87o7kpxapo.fsf@localhost> <87ilawimdq.fsf@yahoo.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="1789"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Eli Zaretskii , emacs-devel@gnu.org To: Po Lu Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Jul 07 14:43:45 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 1qHkoL-0000Gp-FG for ged-emacs-devel@m.gmane-mx.org; Fri, 07 Jul 2023 14:43:45 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qHknP-0002E4-HC; Fri, 07 Jul 2023 08:42:47 -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 1qHknM-0002DV-Pr for emacs-devel@gnu.org; Fri, 07 Jul 2023 08:42:44 -0400 Original-Received: from mout02.posteo.de ([185.67.36.66]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qHknK-0000TX-24 for emacs-devel@gnu.org; Fri, 07 Jul 2023 08:42:44 -0400 Original-Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 3B499240103 for ; Fri, 7 Jul 2023 14:42:40 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1688733760; bh=UxNjzaWDrNTz1zj2ttJoYLPy2wk5ZpIyjViIP7dW4Yk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:From; b=VE9UVGHeV2XNaWyT5mGQNmjGkfFBUhdUPEgT+GWybKGJzMkc71HRkhaXO+Iv+TK8z RT4IyEn+jFA8PFNwMW1l6aZmw2QuFt4f9s+Vr6/PZVDN1fcDk8h5u5rcF3Z/o9cP+6 QAkbep/36Mcs4EYtzaWq/UZA9KhSiYdxlltS6/8AeeUprzI/wJSTZAOFmbzvMOxWH4 eiMb90onO2tbL9cnVaby+qxMRYTRg0lNxps3VER+CYSSy8bXUYYo1w2fgs7aQnLi5U Oubsns5zPWtG8vFxvipuzISVLh4e1lW1Ltt+Xnqt+H4nEfHHmjwNP4ikSEaT/5dP7S V2xbFW1egO5cA== Original-Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4QyCjC4vLMz6twb; Fri, 7 Jul 2023 14:42:39 +0200 (CEST) In-Reply-To: <87ilawimdq.fsf@yahoo.com> Received-SPF: pass client-ip=185.67.36.66; envelope-from=yantar92@posteo.net; helo=mout02.posteo.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:307563 Archived-At: Po Lu writes: > Ihor Radchenko writes: > >> Same with variables - even if some global variable needs to be locked, >> it is unlikely that it will need to be accessed by another thread. > > I doubt symbol value cells will need to be individually interlocked. > Emacs Lisp code will need to insert the appropriate instructions to > prevent the CPU from undertaking optimizations on load and store > operations on those cells when necessary. ... I had a different simple scenario in mind: (let ((oldval case-fold-search)) (unwind-protect (progn (setq case-fold-search nil) ;; We surely do not want the value of `case-fold-search' to be ;; changed in the middle of `expensive-computation'. (expensive-computation)) (setq case-fold-search oldval)) -- Ihor Radchenko // yantar92, Org mode contributor, Learn more about Org mode at . Support Org development at , or support my work at