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Message-ID: <00b201c1a4ac$935891f0$0200a8c0@lifelesswks>
From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: "Lapo Luchini" <lapo AT lapo DOT it>, <cygwin AT cygwin DOT com>
References: <00af01c1a3de$7af04b40$60a407d5 AT BRAMSCHE> <3C4E6FD1 DOT 9060505 AT computer DOT org> <20020123172718 DOT GE6765 AT redhat DOT com> <3C4F01DF DOT 70AA4F00 AT lapo DOT it> <20020123190335 DOT GC18042 AT redhat DOT com> <3C4F64B4 DOT 380E84AF AT lapo DOT it>
Subject: Re: gettimeofday() does not returns usec resolution
Date: Thu, 24 Jan 2002 18:56:04 +1100
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===
----- Original Message -----
From: "Lapo Luchini" <lapo AT lapo DOT it>
To: <cygwin AT cygwin DOT com>
Sent: Thursday, January 24, 2002 12:34 PM
Subject: Re: gettimeofday() does not returns usec resolution


> > Hmm.  I do remember this patch.  Can you submit this to
cygwin-patches
> > in the correct format: http://cygwin.com/contrib.html ?
>
> Given enough time, yes (never hacked that one, but it seems that only
> winsup/cygwin/times.cc would need to be modified).. anyway of course
I'm one of
> the few that actually would like to have this feature so I guess
there's no big
> hurry.
>
> Of course the number reported by PerformanceTimer has an unknown
offset with
> system time (it appears to start at 0 at program start, but that's not
clearly
> specified) so I would have calculate an initial "offset" in the "old"
way... this
> would give 3-4 microsecond precision on "deltas" but an initial
uncertainty of
> the usual 15 milliseconds or so.

As long as the calibration only occurs when someone is using
gettimeofday, not on every cygwin1.dll load, then that sounds fine to
me.

Rob


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