From owner-freebsd-questions@FreeBSD.ORG  Sun Feb 27 19:08:44 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 8E82316A4CE
	for <freebsd-questions@freebsd.org>;
	Sun, 27 Feb 2005 19:08:44 +0000 (GMT)
Received: from xenial.mcc.ac.uk (xenial.mcc.ac.uk [130.88.203.16])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 4BF7143D39
	for <freebsd-questions@freebsd.org>;
	Sun, 27 Feb 2005 19:08:44 +0000 (GMT)
	(envelope-from jcm@FreeBSD-uk.eu.org)
Received: from dogma.freebsd-uk.eu.org ([130.88.200.97])
	by xenial.mcc.ac.uk with esmtp (Exim 4.43 (FreeBSD))
	id 1D5TmV-000CwV-GC
	for freebsd-questions@freebsd.org; Sun, 27 Feb 2005 19:08:43 +0000
Received: from dogma.freebsd-uk.eu.org (localhost [127.0.0.1])
	j1RJ8heu035214
	for <freebsd-questions@freebsd.org>; Sun, 27 Feb 2005 19:08:43 GMT
	(envelope-from jcm@dogma.freebsd-uk.eu.org)
Received: (from jcm@localhost)
	by dogma.freebsd-uk.eu.org (8.13.1/8.12.6/Submit) id j1RJ8g94035213
	for freebsd-questions@freebsd.org; Sun, 27 Feb 2005 19:08:42 GMT
Date: Sun, 27 Feb 2005 19:08:42 +0000
From: Jonathon McKitrick <jcm@FreeBSD-uk.eu.org>
To: freebsd-questions@freebsd.org
Message-ID: <20050227190842.GC34795@dogma.freebsd-uk.eu.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.4i
Subject: Blocking on multiple threads with timeout
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 27 Feb 2005 19:08:44 -0000


I have a few threads that might need as long as a minute or more to
complete and terminate.  If they exceed an arbitrary time, they can be
canceled.

In Win32, there is a 'wait on multiple objects' call.  I'm not sure if it
blocks or spins, but it *does* take a timeout argument.

Is there a similar way with pthreads that I can use that will kill the
threads after a certain time, but without spinlocking?  After a minute of
spinning, my laptop fan kicks on, and I'd like to be a bit more reasonable
about my CPU cycle demands. :-)

Jonathon McKitrick
--
My other computer is your Windows box.