/**
* Runs the simulation.
*
* @param integer $timeLimit The amount of simulation time to be simulated.
*/
public function run($timeLimit)
{
$serverBusy = false;
$numberInQueue = 0;
$serviceTime = new ExponentialRV(100.0);
$interArrivalTime = new ExponentialRV(100.0);
$this->eventList->enqueue(new Simulation_Event(self::ARRIVAL, 0));
while (!$this->eventList->isEmpty()) {
$event = $this->eventList->dequeueMin();
$t = $event->getTime();
if ($t > $timeLimit) {
$this->eventList->purge();
break;
}
//[
printf("%s\n", str($event));
//]
switch ($event->getType()) {
case self::ARRIVAL:
if (!$serverBusy) {
$serverBusy = true;
$this->eventList->enqueue(new Simulation_Event(self::DEPARTURE, $t + $serviceTime->next()));
} else {
++$numberInQueue;
}
$this->eventList->enqueue(new Simulation_Event(self::ARRIVAL, $t + $interArrivalTime->next()));
break;
case self::DEPARTURE:
if ($numberInQueue == 0) {
$serverBusy = false;
} else {
--$numberInQueue;
$this->eventList->enqueue(new Simulation_Event(self::DEPARTURE, $t + $serviceTime->next()));
}
break;
}
}
}
{
parent::__destruct();
}
/**
* Returns the next random number.
*
* @return float The next random number.
*/
public function next()
{
return -$this->mu * log(RandomNumberGenerator::next());
}
//}>a
/**
* Main program.
*
* @param array $args Command-line arguments.
* @return integer Zero on success; non-zero on failure.
*/
public static function main($args)
{
printf("ExponentialRV main program.\n");
$status = 0;
$rv = new ExponentialRV(100.0);
AbstractRandomVariable::test($rv);
return $status;
}
}
if (realpath($argv[0]) == realpath(__FILE__)) {
exit(ExponentialRV::main(array_slice($argv, 1)));
}
