Kraken\Loop\Model\SelectLoop::addReadStream PHP 메소드

    public function addReadStream($stream, callable $listener)
    {
        $key = (int) $stream;
        if (!isset($this->readStreams[$key])) {
            $this->readStreams[$key] = $stream;
            $this->readListeners[$key] = $listener;
        }
    }