public function set_time($time)
{
switch ($this->_instruction) {
case TIME_SECONDS:
$this->_stop_time = $time + time();
break;
case TIME_MILLISECONDS:
$this->_stop_time = $time + milliseconds();
break;
case TIME_MICROSECONDS:
// $this->_stop_time = (($time * 0.000001) - XPSPL_AVERAGE_LOOPTIME) + microtime(true);
$this->_stop_time = $time * 1.0E-6 + microtime(true);
break;
// case TIME_NANOSECONDS:
// $this->_stop_time = ($time)
}
}