On Tue, 2011-01-11 at 05:45 +0900, Kuwahara,T. wrote:

On Tue, Jan 11, 2011 at 1:49 AM, john stultz [off-list ref] wrote:

quoted

Leapsecond processing is done via an absolute hrtimer. Thus when the
time offset is set, the hrtimers that should have expired will fire
(just like with settimeofday) and the adjustment will then be made.

How do you convert relative time to absolute time?  It's not trivial
because TAI offset is also a variable.

I don't believe I understand what you're getting at.

The proposed interface is almost identical in functionality to a
userland application doing the following:

	offset = my_calculate_offset();
	clock_gettime(CLOCK_REALTIME, &now);
	newtime = my_add_ts(now, offset);
	settimeofday(&newtime, 0);

The only difference is that you avoid the error from the delay between
the gettime call and the settime call. It just adds the offset directly
to the CLOCK_REALTIME.


thanks
-john