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: "Asynchronous Requests from Emacs Dynamic Modules" Date: Sat, 31 Oct 2020 08:49:21 -0400 Message-ID: References: <86imarfldb.fsf@akirakyle.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="24738"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Akira Kyle , Emacs developers To: Philipp Stephani Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Oct 31 13:50:06 2020 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 1kYqKb-0006Le-7x for ged-emacs-devel@m.gmane-mx.org; Sat, 31 Oct 2020 13:50:05 +0100 Original-Received: from localhost ([::1]:44622 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kYqKa-0000UH-Ag for ged-emacs-devel@m.gmane-mx.org; Sat, 31 Oct 2020 08:50:04 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43054) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kYqK0-0008UP-5G for emacs-devel@gnu.org; Sat, 31 Oct 2020 08:49:28 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:25690) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kYqJx-0005ri-V5 for emacs-devel@gnu.org; Sat, 31 Oct 2020 08:49:27 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id AB38C809A1; Sat, 31 Oct 2020 08:49:24 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 96D528096B; Sat, 31 Oct 2020 08:49:22 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1604148562; bh=qG/0avBQEZ3A+QC3+V4wM5rFxccpWry2EZ7E1pdlSEA=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=R8us9weaKZDxyKefwEu6lZxCVRE+Rhr+fgShMUCWjN4ejMKvpAvZlDQlHqqhso+Bt F1RwtRnYyktiBXi3m8EHfE3pC2xWCZHo59w5FTC6tLVYmSc2FtVSOP/UOOu17T8wZ7 smiJdJj11wHkgdOoNew8aAOJaIyb/n9kJoYF4pAdMTiam+vad1c2QDwO8XYtksvVYP AIe5uu1yoDYtCI+FWq8Uwyx4QabHY4cwtSJWo3VOL0F1k2xf7ze7RLImuy8Ri8xD0Q XmGGCS2ttGOLeayxcdBkgXfL1nWeGu6zQHbVwafmaHxg67J3J9oqfkgzufPvKiqf91 hwjhnZq60FLag== Original-Received: from alfajor (unknown [157.52.9.240]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 5806E1201DA; Sat, 31 Oct 2020 08:49:22 -0400 (EDT) In-Reply-To: (Philipp Stephani's message of "Sat, 31 Oct 2020 08:36:06 +0100") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/31 08:49:24 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] 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 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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:258580 Archived-At: > With Emacs 28, you can get a file descriptor to a pipe process and > send arbitrary data there (from arbitrary threads). Cool, so that takes care of it. > You'd still need some small protocol (e.g. JSON) to encode/decode > requests, but with that you can send arbitrary requests > back asynchronously. I don't think you need a complex protocol: just stash somewhere (inside the module data structures) the data you need for the async request, then send a dummy byte to the pipe. On the Lisp side, just install a process-filter which calls back the module to "run any pending async requests". Stefan