/**
* Prepares the event to be used
*
* @see event_set
* @link http://www.php.net/manual/en/function.event-set.php
*
* @see event_base_set
* @link http://www.php.net/manual/en/function.event-base-set.php
*
* @param resource|mixed $fd Valid PHP stream resource. The stream must be castable to file descriptor,
* so you most likely won't be able to use any of filtered streams.
* @param int $events A set of flags indicating the desired event, can be EV_TIMEOUT, EV_READ, EV_WRITE and EV_SIGNAL.
* The additional flag EV_PERSIST makes the event to persist until {@link event_del}() is
* called, otherwise the callback is invoked only once.
* @param callable $callback Callback function to be called when the matching event occurs.
* @param array $arguments
*
* @throws EventException|\InvalidArgumentException
*
* @return Event
*/
public function prepare($fd, $events, $callback, array $arguments = array())
{
if ($this->enabled) {
$this->disable();
}
if (!is_callable($callback)) {
throw new \InvalidArgumentException('Callback must be callable.');
}
if (!event_set($this->resource, $fd, $events, array($this, 'invoke'), $this)) {
throw $this->exception('Could not prepare event (event_set).');
}
if ($events & EV_PERSIST) {
$this->persist = true;
}
if (false === event_base_set($this->resource, $this->base->getResource())) {
throw $this->exception('Could not set event base (event_base_set).');
}
$this->callback = $callback;
$this->arguments = $arguments;
$this->prepared = true;
$this->base->registerEvent($this);
return $this;
}
