If (provided? 'current-time)
:
The procedures current-time
, difftime
, and
offset-time
deal with a calendar time datatype
which may or may not be disjoint from other Scheme datatypes.
Returns the time since 00:00:00 GMT, January 1, 1970, measured in
seconds. Note that the reference time is different from the reference
time for get-universal-time
in Common-Lisp Time.
Returns the difference (number of seconds) between twe calendar times: caltime1 - caltime0. caltime0 may also be a number.
Returns the calendar time of caltime offset by offset number
of seconds (+ caltime offset)
.