gistfile1.txt

    return futurePromise($loop)->then(function () use ($loop, $check) {
        $result = $check();
        if ($result !== false) {
            return $result;
        }

        return tickingFuturePromise($loop, $check);
    });
    /*$deferred = new Deferred();
    $loop->futureTick(function () use ($deferred, $check, $loop) {
        $deferred->progress(time());
        $result = $check();
        if ($result !== false) {
            $deferred->resolve($result);
            return;
        }

        tickingFuturePromise($loop, $check)->then(function ($result) use ($deferred) {
            $deferred->resolve($result);
        });
    });
    return $deferred->promise();*/