tree 2eceda292a0bcaa6703d12ef374d5f1c355b1b3e
parent 95fdebe28bedf41be4020310efa270c1e2afa59a
author Alexander Afanasyev <alexander.afanasyev@ucla.edu> 1415665325 -0800
committer Alexander Afanasyev <alexander.afanasyev@ucla.edu> 1415904922 -0800

time: Add ability to specialize system and steady clocks

Default implementation is "optimized" to use boost::chrono clocks.  When
specialization is used, now() calls are redirected to the virtual
methods of the specified specialization.

This commit also includes an implementation of UnitTestClock that
can be used in unit tests to eliminate dependency on the wall clock.

Change-Id: I7ced774634d90ce32714a71e2a66129cba91b9ae
Refs: #2158