Icicle\Concurrent\Worker\AbstractWorker::shutdown PHP Метод

    public function shutdown() : \Generator
    {
        if (!$this->context->isRunning() || $this->shutdown) {
            throw new StatusError('The worker is not running.');
        }
        $this->shutdown = true;
        // Cancel any waiting tasks.
        $this->cancelPending();
        // If a task is currently running, wait for it to finish.
        if (null !== $this->active) {
            try {
                (yield $this->active);
            } catch (\Throwable $exception) {
                // Ignore failure in this context.
            }
        }
        yield from $this->context->send(0);
        return yield from $this->context->join();
    }