Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
X-WM-Posted-At:	avacado.atomice.net; Thu, 9 May 02 00:23:50 +0100
Message-ID:	<018001c1f6e7$6924c420$0100a8c0@advent02>
From:	"Chris January" <chris AT atomice DOT net>
To:	<cygwin AT cygwin DOT com>
References:	<15547 DOT 16136 DOT 163472 DOT 840007 AT bea DOT com><20020415214133 DOT GA19612 AT redhat DOT com> <15577 DOT 12319 DOT 622365 DOT 566799 AT bea DOT com>
Subject:	Re: [PATCH] gettimeofday time travels
Date:	Thu, 9 May 2002 00:23:50 +0100
MIME-Version:	1.0
X-Priority:	3
X-MSMail-Priority:	Normal
X-MimeOLE:	Produced By Microsoft MimeOLE V6.00.2600.0000

>  > >How about the attached quick and dirty fix?
>  >
>  > I'm sorry but I don't think a quick and dirty fix is justified if
>  > there are other alternatives. I haven't seen any other alternatives
>  > discussed yet.
>
> No other alternatives have been proposed. I'm aware of a couple of
> other XEmacs'ers who are plagued by this (we love our uptime).
>
> I don't believe my patch to be dirtier than the implementation (no
> offence intended!). Please reconsider it.
On Windows  NT, you can use the ZwQuerySystemInformation internal call with
the SystemTimeOfDayInformation structure to get the current time of day at a
greater resolution than you can with the Performance counters. I'm not sure
about the granularity though - that's something that would have to be
tested. However the value doesn't suffer from time-travelling problems. If
indeed the granularity is too coarse, you could still use the value to check
that the QueryPerformanceCounters value is sane (which is what I believe
this discussion was originally about).

Regards
Chris



--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -