From owner-cvs-all@FreeBSD.ORG  Sun Oct 31 11:19:46 2004
Return-Path: <owner-cvs-all@FreeBSD.ORG>
Delivered-To: cvs-all@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id E261116A4CE; Sun, 31 Oct 2004 11:19:46 +0000 (GMT)
Received: from mail.ntplx.net (mail.ntplx.net [204.213.176.10])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 850B943D1F; Sun, 31 Oct 2004 11:19:46 +0000 (GMT)
	(envelope-from deischen@freebsd.org)
Received: from sea.ntplx.net (sea.ntplx.net [204.213.176.11])
	i9VBJjDu008631;	Sun, 31 Oct 2004 06:19:45 -0500 (EST)
Date: Sun, 31 Oct 2004 06:19:45 -0500 (EST)
From: Daniel Eischen <deischen@freebsd.org>
X-X-Sender: eischen@sea.ntplx.net
To: Brian Feldman <green@freebsd.org>
In-Reply-To: <200410310503.i9V53ofj011896@repoman.freebsd.org>
Message-ID: <Pine.GSO.4.43.0410310608001.21125-100000@sea.ntplx.net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Virus-Scanned: by AMaViS and Clam AntiVirus (mail.ntplx.net)
cc: cvs-src@freebsd.org
cc: src-committers@freebsd.org
cc: cvs-all@freebsd.org
Subject: Re: cvs commit: src/lib/libpthread/thread thr_mutex.c
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: Daniel Eischen <deischen@freebsd.org>
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 31 Oct 2004 11:19:47 -0000

On Sun, 31 Oct 2004, Brian Feldman wrote:

> green       2004-10-31 05:03:50 UTC
>
>   FreeBSD src repository
>
>   Modified files:
>     lib/libpthread/thread thr_mutex.c
>   Log:
>   Make pthread_mutex_trylock(3) return EBUSY on failure, as all software
>   packages expect and seems to be most correct according to the slightly-
>   ambiguous standards.
>
>   MFC after:              1 month
>   Corroborated by:        POSIX <http://tinyurl.com/4uvub>
>   Reviewed by:            silence on threads@

I never saw this, and there has been a couple of long threads about
it.  The current behavior was deemed correct especially since default
mutexes are error check mutexes.  The rationale is that it provides a way
for a thread to tell if it owns the mutex if EDEADLK is returned.

Please back out and sorry for not seeing a posting on -threads.

-- 
Dan Eischen