Provide data structures to capture a timestamp in two different
clocks, monitor the drift between those clocks, and using a base
instant with estimated drift convert between the clocks.
This provides the core technology to convert between system uptime and
an external continuous time scale like TAI (UTC without applying leap
seconds).
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
We don't have to build an image for running test timeutil. We
can just build a native app to test it. So move it into "unit"
directory.
Also, add 64-bit support for unit testing framework.
Signed-off-by: Steven Wang <steven.l.wang@linux.intel.com>
Peter A. Bigot