Re: [boost] Date time query

From: Jeff Garland (jeff_at_[hidden])
Date: 2004-07-25 21:11:20

On Mon, 26 Jul 2004 11:43:55 +1000, Matt Hurd wrote
> On Sat, 24 Jul 2004 11:24:39 +0100, John Maddock 
> <john_at_[hidden]> wrote:
> > Just out of interest, what is the problem that prevents the date-time
> > library from implementing a microsecond clock using GetSystemTimeAsFileTime
> > on Win32?
> > 
> > Thanks,
> > 
> > John.
> 
> The resolution supplied by GetSystemTimeAsFileTime may not be what 
> you think.  I get 10 milliseconds resolution out of my machine from the
> following code.

Yes, this is a problem -- but at least it is subsecond resolution which is
better than the second level resolution of the other clock type.  So 'high
resolution clock' probably would be a better name with caveats by platform. 
BTW, part of the test is to ensure that the clock values monotonically
increase with repeated sampling...

Jeff