From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: =?utf-8?Q?=C3=93scar_Fuentes?= Newsgroups: gmane.emacs.devel Subject: Re: Why doesn't Emacs have an `active-timer-p' command, or why can't I find it? Date: Thu, 11 Nov 2021 22:24:47 +0100 Message-ID: <87r1bmo068.fsf@telefonica.net> References: <83lf1uzaw8.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="35456"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: emacs-devel@gnu.org Cancel-Lock: sha1:8/vtcBQFhri/td72ZB+KpUVcGJA= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Nov 11 22:25:38 2021 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 1mlHZi-00090k-Jd for ged-emacs-devel@m.gmane-mx.org; Thu, 11 Nov 2021 22:25:38 +0100 Original-Received: from localhost ([::1]:40284 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mlHZg-0006tB-1E for ged-emacs-devel@m.gmane-mx.org; Thu, 11 Nov 2021 16:25:36 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:38528) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlHZ9-0006DI-9G for emacs-devel@gnu.org; Thu, 11 Nov 2021 16:25:03 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:42444) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlHZ7-0004yB-MT for emacs-devel@gnu.org; Thu, 11 Nov 2021 16:25:03 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mlHZ3-000865-85 for emacs-devel@gnu.org; Thu, 11 Nov 2021 22:24:57 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=ged-emacs-devel@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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:279278 Archived-At: Alan Mackenzie writes: > Hello, Eli. > > On Thu, Nov 11, 2021 at 22:37:43 +0200, Eli Zaretskii wrote: >> > Date: Thu, 11 Nov 2021 20:31:24 +0000 >> > From: Alan Mackenzie > >> > There doesn't appear to be an easy way in a Lisp program to determine if >> > a timer object is active. > >> What is an "active timer", and how does it differ from a non-active >> one? > > An active timer is one which will trigger its timer function at the > appropriate time. > > A non-active timer is one which will not trigger any timer function - > for example, a non-repeating timer which has already triggered. > > timerp returns t for both of these objects. Following the implicit definition on the docstring of `cancel-timer', an active timer is a timer object contained in the list of active timers (actually, either in `timer-list' or in `timer-idle-list'.) An implementation would be (defun timer-active-p (timer) (timer--check timer) (or (memq timer timer-list)) (memq timer timer-idle-list))