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<?php
/**
* LibEvent "basic" event functionality
*
* @link http://www.wangafu.net/~nickm/libevent-book/
*
* @uses libevent
*
* @project Anizoptera CMF
* @package system.libevent
*/
abstract class CLibEventBasic
{
/**
* Unique event IDs counter
*
* @var int
*/
private static $counter = 0;
/**
* Unique event ID
*
* @var int
*/
public $id;
/**
* Event resource
*
* @var resource
*/
public $resource;
/**
* @var CLibEventBase
*/
public $base;
/**
* Creates a new event resource.
*
* @throws AzaException if Libevent isn't available
*/
public function __construct()
{
// if (!function_exists('event_base_new')) {
if (!CShell::$hasLibevent) {
throw new AzaException('You need to install PECL extension "Libevent" to use this class', 2);
}
$this->id = ++self::$counter;
}
/**
* Desctructor
*/
public function __destruct()
{
$this->resource && $this->free();
}
/**
* Associate buffered event with an event base
*
* @param CLibEventBase $event_base
*
* @return CLibEventBasic
*/
public function setBase($event_base)
{
$this->base = $event_base;
$event_base->events[$this->id] = $this;
return $this;
}
/**
* Destroys the event and frees all the resources associated.
*/
public function free()
{
if ($this->base) {
unset($this->base->events[$this->id]);
$this->base = null;
}
}
/**
* Checks event resource.
*
* @throws AzaException if resource is already freed
*/
protected function checkResourse()
{
if (!$this->resource) {
throw new AzaException('Can\'t use event resource. It\'s already freed.', 2);
}
}
}
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