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Subject:	Re: Bug affecting postgres now() function - more info and offer to fix cygwin bug...
From:	Sean McCune <sean AT redhandsoftware DOT com>
To:	cygwin AT cygwin DOT com
In-Reply-To:	<20040701113737.GD1389@cygbert.vinschen.de>
References:	<1088347078 DOT 16132 DOT 21 DOT camel AT verona DOT mccinternal DOT com> <1088478284 DOT 13417 DOT 31 DOT camel AT verona DOT mccinternal DOT com> <20040701113737 DOT GD1389 AT cygbert DOT vinschen DOT de>
Organization:	Red Hand Software, Inc.
Message-Id:	<1088693909.27964.2.camel@verona.mccinternal.com>
Mime-Version:	1.0
Date:	Thu, 01 Jul 2004 10:58:30 -0400
X-IsSubscribed:	yes

Great!  I was going to start work on a fix, too, but ran into cygwin
building problems, so you beat me to it.  Thanks!

I have the snapshot running.  And postgres is keeping time.  I haven't
looked at your source yet, but I assume there's still an independent
counter running and you're resetting the base time it counts from.  If
this is so, I don't really have a way to test the wrap-around other than
to let it run for 50 days and see if it works.  :) 


On Thu, 2004-07-01 at 07:37, Corinna Vinschen wrote:
> On Jun 28 23:04, Sean McCune wrote:
> > More useful info: (and yes I'm replying to my own message)
> > 
> > I spelunked through the source code and found this in times.cc:
> > 
> > LONGLONG
> > hires_ms::usecs (bool justdelta)
> > {
> >   if (!minperiod) /* NO_COPY variable */
> >     prime ();
> >   DWORD now = timeGetTime ();
> >   // FIXME: Not sure how this will handle the 49.71 day wrap around
> >   LONGLONG res = initime_us.QuadPart + ((LONGLONG) (now - initime_ms) *
> > 1000);
> >   return res;
> > }
> 
> I've checked in a potential fix.  Could you try the latest Cygwin snapshot
> from http://cygwin.com/snapshots.html ?
> 
> Thanks,
> Corinna
-- 
Sean McCune
Red Hand Software, Inc.
sean AT redhandsoftware DOT com


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