From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Tom Tromey Newsgroups: gmane.emacs.devel Subject: Re: Return value of finished threads Date: Sat, 21 Jul 2018 08:19:14 -0600 Message-ID: <87h8ks4qot.fsf@tromey.com> References: <87h8kuq7kf.fsf@gmx.de> <87h8kt3hcj.fsf@tromey.com> <87wotphqre.fsf@gmx.de> <87lga44u14.fsf@tromey.com> <874lgsivam.fsf@gmx.de> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1532182649 14763 195.159.176.226 (21 Jul 2018 14:17:29 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 21 Jul 2018 14:17:29 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.50 (gnu/linux) Cc: Tom Tromey , emacs-devel@gnu.org To: Michael Albinus Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Jul 21 16:17:24 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 1fgshI-0003j8-56 for ged-emacs-devel@m.gmane.org; Sat, 21 Jul 2018 16:17:24 +0200 Original-Received: from localhost ([::1]:52589 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fgsjO-0000Qj-O7 for ged-emacs-devel@m.gmane.org; Sat, 21 Jul 2018 10:19:34 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:43350) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fgsjA-0000QT-RW for emacs-devel@gnu.org; Sat, 21 Jul 2018 10:19:21 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fgsj7-00022w-Lf for emacs-devel@gnu.org; Sat, 21 Jul 2018 10:19:20 -0400 Original-Received: from gateway32.websitewelcome.com ([192.185.145.101]:47570) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fgsj7-00022e-CJ for emacs-devel@gnu.org; Sat, 21 Jul 2018 10:19:17 -0400 Original-Received: from cm17.websitewelcome.com (cm17.websitewelcome.com [100.42.49.20]) by gateway32.websitewelcome.com (Postfix) with ESMTP id B9C65D85FA5 for ; Sat, 21 Jul 2018 09:19:15 -0500 (CDT) Original-Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with SMTP id gsj5fdCFbPvAdgsj5fhkhg; Sat, 21 Jul 2018 09:19:15 -0500 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tromey.com; s=default; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=nJCuoCkRW5dS+K3xM9UQOOK4EWRYoqWriK/yZjyrwM4=; b=Bw9KXUjqcxWuW3IsKtvKhUy0EU g9TLnIZDTMdvhKixyz3J9a/hzxCAQG1FHRM9eWZRlPgIR88d7h8I6UmMi0jpwZ48zniwc7aO0wym6 qq/IVdeQlv0++jckxSDMqut6x; Original-Received: from 75-166-85-72.hlrn.qwest.net ([75.166.85.72]:54154 helo=bapiya) by box5379.bluehost.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1fgsj5-001Pky-A8; Sat, 21 Jul 2018 09:19:15 -0500 X-Attribution: Tom In-Reply-To: <874lgsivam.fsf@gmx.de> (Michael Albinus's message of "Sat, 21 Jul 2018 15:16:01 +0200") X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - gnu.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 75.166.85.72 X-Source-L: No X-Exim-ID: 1fgsj5-001Pky-A8 X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 75-166-85-72.hlrn.qwest.net (bapiya) [75.166.85.72]:54154 X-Source-Auth: tom+tromey.com X-Email-Count: 2 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 192.185.145.101 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:227618 Archived-At: >>>>> "Michael" == Michael Albinus writes: Michael> Yes, likely until a thread-join has happened. And a second thread-join Michael> on the same thread shall always return ni. I was wondering which semantics would be preferred here. Having each thread-join return the same result doesn't seem so bad either. Michael> How long do we keep the results of dead threads, for which no Michael> thread-join happens? Do we need a Lisp cleanup function, which purges Michael> all dead threads results? Or does this the GC, when no Lisp object holds Michael> the dead thread any longer? I didn't look deeply but I think instead of mark_threads, alloc.c would need to mark any thread it runs across; and then mark_one_thread could handle exited threads specially. Michael> (Btw, I believe it will be much better when you implement this. It is Michael> still hard for me to read and modify threads.c) I will see if I can find some time. But I think your patch is close so you should keep going :-) Tom