libevent-cyc-ref-gc-fail.php

<?php

class Bar {
	public $name;
	public $event;

	public function callback($name) {
	}

	public function __construct($name) {
		$this->name = $name;
	}

	public function __destruct() {
		echo 'destruct ', $this->name, PHP_EOL;
	}
}


$base = event_base_new();


$obj1  = new Bar(1);
$event = event_new();
event_set($event, STDIN, EV_READ | EV_PERSIST, [$obj1, 'callback']);
event_base_set($event, $base);
$event = null;
$obj1  = null;
gc_collect_cycles();
echo "==== THE END of test 1 ====\n";

$obj2        = new Bar(2);
$obj3        = new Bar(3);
$obj3->event = event_new();
event_set($obj3->event, STDIN, EV_READ | EV_PERSIST, [$obj2, 'callback']);
event_base_set($obj3->event, $base);
$obj3 = null;
$obj2 = null;
gc_collect_cycles();
echo "==== THE END of test 2 ====\n";

$obj4        = new Bar(4);
$obj4->event = event_new();
event_set($obj4->event, STDIN, EV_READ | EV_PERSIST, [$obj4, 'callback']);
event_base_set($obj4->event, $base);
$obj4 = null;
gc_collect_cycles();
echo "==== THE END of test 3 ====\n";