From owner-freebsd-x11@FreeBSD.ORG  Thu Feb 28 22:14:52 2008
Return-Path: <owner-freebsd-x11@FreeBSD.ORG>
Delivered-To: freebsd-x11@FreeBSD.org
Received: from [127.0.0.1] (freefall.freebsd.org [IPv6:2001:4f8:fff6::28])
	by hub.freebsd.org (Postfix) with ESMTP id 0C0981065672;
	Thu, 28 Feb 2008 22:14:52 +0000 (UTC)
	(envelope-from jkim@FreeBSD.org)
From: Jung-uk Kim <jkim@FreeBSD.org>
To: freebsd-x11@FreeBSD.org
Date: Thu, 28 Feb 2008 17:14:35 -0500
User-Agent: KMail/1.6.2
References: <47C320DB.70004@delphij.net> <200802281607.30178.jkim@FreeBSD.org>
	<18375.10353.816420.456552@gromit.timing.com>
In-Reply-To: <18375.10353.816420.456552@gromit.timing.com>
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <200802281714.43057.jkim@FreeBSD.org>
Cc: Thomas Mueller <tmueller@sysgo.com>, delphij@delphij.net
Subject: Re: Xorg vs gettimeofday() and clock_gettime()
X-BeenThere: freebsd-x11@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: X11 on FreeBSD -- maintaining and support <freebsd-x11.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-x11>,
	<mailto:freebsd-x11-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-x11>
List-Post: <mailto:freebsd-x11@freebsd.org>
List-Help: <mailto:freebsd-x11-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-x11>,
	<mailto:freebsd-x11-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 28 Feb 2008 22:14:52 -0000

On Thursday 28 February 2008 04:32 pm, John E Hein wrote:
> Jung-uk Kim wrote at 16:07 -0500 on Feb 28, 2008:
>  > So this test was introduced in the following commit:
>  >
>  > http://lists.freedesktop.org/archives/xorg-commit/2006-November/
>  >009390.html
>  >
>  > Google found me this:
>  >
>  > http://www.opengroup.org/austin/mailarchives/ag-review/msg00489.
>  >html
>  >
>  > 'The recently-approved 1003.1j-2000 adds CLOCK_MONOTONIC to the
>  > list.'
>  >
>  > I think 1003.1b-1993 added clock_gettime(2) and configure.ac
>  > tests bogus spec.
>
> I suspect the autoconf test was probably written against the linux
> time.h which specifies _POSIX_C_SOURCE 199309 for all the CLOCK_*
> constants.
>
> Your quote seems to indicate that is wrong (which makes sense to me
> since I don't recall the CLOCK_* values around back to 1993).  But
> I have not done the work to dig into the spec.
>
> If someone verifies that to be the case, please submit a PR to xorg
> to fix their autoconf check.

I found it from SUSv3:

http://www.opengroup.org/onlinepubs/009695399/basedefs/time.h.html

'The manifest constant CLOCK_MONOTONIC and the clock_nanosleep() 
function are added for alignment with IEEE Std 1003.1j-2000.'

Jung-uk Kim