pthreads\Promisable::run PHP Method

    public function run()
    {
        $this->setState(PROMISABLE::PENDING);
        try {
            $this->onFulfill();
        } catch (\Exception $ex) {
            $this->setState(PROMISABLE::ERROR, $ex);
        } finally {
            switch ($this->state) {
                case PROMISABLE::PENDING:
                case null:
                    $this->setState(PROMISABLE::FULFILLED);
                    break;
            }
        }
    }