$cur_time = GetCurrentTime();
 ($cdate, $ctime) = split(/ /, $cur_time);
  ($chour,$cmin,$csec) = split(/:/, $ctime);
$current_time = ($chour*3600) + ($cmin*60) + $csec;
same way for the req time:
$requested_time = ($hour*3600) + ($min*60) + $sec;

if (($current_time - $requested_time) >= 3600
Do processing.....