public function afterForkChild()
    {
        //possible event base free?
        unset($this->eventBase);
        unset($this->nextTickQueue);
        unset($this->futureTickQueue);
        //bugfix lambda function destructed while executing -.-
        //unset($this->timerCallback);
        //unset($this->streamCallback);
        unset($this->timerEvents);
        unset($this->running);
        $this->streamEvents = array();
        $this->streamFlags = array();
        $this->readListeners = array();
        $this->writeListeners = array();
        //call constructor
        $this->__construct();
        return $this;
    }