From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: A question regarding sit-for (and while-no-input) Date: Thu, 06 Sep 2018 08:33:32 -0400 Message-ID: References: <87k1nyzwx5.fsf@gmail.com> <87ftymzvjv.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1536237129 17907 195.159.176.226 (6 Sep 2018 12:32:09 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 6 Sep 2018 12:32:09 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Sep 06 14:32:05 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fxtS9-0004WS-3v for ged-emacs-devel@m.gmane.org; Thu, 06 Sep 2018 14:32:05 +0200 Original-Received: from localhost ([::1]:33044 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fxtUF-0001KL-LG for ged-emacs-devel@m.gmane.org; Thu, 06 Sep 2018 08:34:15 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45912) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fxtTl-00017h-Q2 for emacs-devel@gnu.org; Thu, 06 Sep 2018 08:33:46 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fxtTi-0002WD-Lj for emacs-devel@gnu.org; Thu, 06 Sep 2018 08:33:45 -0400 Original-Received: from [195.159.176.226] (port=57161 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fxtTh-0002TI-1u for emacs-devel@gnu.org; Thu, 06 Sep 2018 08:33:41 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1fxtRX-0003aL-LM for emacs-devel@gnu.org; Thu, 06 Sep 2018 14:31:27 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 20 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:puvdayqZs06MpkgHcBgZDkrYcOI= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:229342 Archived-At: > A quick followup to my question. I did some more tests and it seems an > using unwind-protect fixes the issue. > > (unwind-protect > (while (sit-for 30)) > (setq cancelled t) > ...) Ha, that's exactly what I was about to suggest. > I don't understand the need for the "unwind-protect" and my question > stands. Is the sit-for call silently quitting or what? I don't see any > "Quit" in my *Messages* buffer and I'm not pressing C-g at any moment. Maybe the code is sometimes run within a while-no-input? Also the sit-for could exit non-locally if some other code (timer/processfilter) does a `throw`. Stefan