| ~ClockBase () | ~ClockBase | 
[virtual]
| void  advance_time () | advance_time | 
[pure virtual]
Update internal concept of time.
| void  current_time (TimeVal& tv) | current_time | 
[pure virtual]
Get time it was when advance_time() was last called. Successive calls to current_time return the same value. Time only advances when advance_time() is called.
Parameters:
| tv | TimeVal to be filled in with current time. |