From owner-freebsd-current@FreeBSD.ORG  Fri Feb 20 16:24:42 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from green.homeunix.org (freefall.freebsd.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP
	id 8E8C216A4CE; Fri, 20 Feb 2004 16:24:42 -0800 (PST)
Received: from green.homeunix.org (green@localhost [127.0.0.1])
	by green.homeunix.org (8.12.10/8.12.9) with ESMTP id i1L0OfHS014200;
	Fri, 20 Feb 2004 19:24:41 -0500 (EST)
	(envelope-from green@green.homeunix.org)
Received: from localhost (green@localhost)i1L0OfAi014196;
	Fri, 20 Feb 2004 19:24:41 -0500 (EST)
Message-Id: <200402210024.i1L0OfAi014196@green.homeunix.org>
X-Mailer: exmh version 2.6.3 04/04/2003 with nmh-1.0.4
To: Daniel Eischen <eischen@vigrid.com>
In-Reply-To: Message from Daniel Eischen <eischen@vigrid.com> 
	<Pine.GSO.4.10.10402201906010.5704-100000@pcnet5.pcnet.com> 
From: "Brian F. Feldman" <green@FreeBSD.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Fri, 20 Feb 2004 19:24:40 -0500
Sender: green@green.homeunix.org
cc: current@FreeBSD.org
Subject: Re: Testers wanted: reentrant resolver 
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 21 Feb 2004 00:24:42 -0000

Daniel Eischen <eischen@vigrid.com> wrote:
> Ugh, can you put h_errno inside the per-thread res stuff.
> We shouldn't need to have to add special hooks in the
> threads libraries for this.

Please explain what you're saying further.  On correctly-threaded operating 
systems, h_errno is just like errno -- and I made it act EXACTLY as errno 
acts, and is per-thread storage for everything but the first thread.  It's 
absolutely necessary if we want to return the correct errors; even if 
everything else in the world is totally reentrant, if h_errno isn't, the 
wrong errors can be returned!  What "special hooks" do you mean?  There's no 
way to not change probably hundreds of lines of code without actually doing 
the work to make h_errno thread-safe.  It's the only proper thing to do.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green@FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\