static bool virtio_queue_host_notifier_aio_poll(void *opaque) { EventNotifier *n = opaque; VirtQueue *vq = container_of(n, VirtQueue, host_notifier); bool progress; if (virtio_queue_empty(vq)) { return false; } progress = virtio_queue_notify_aio_vq(vq); /* In case the handler function re-enabled notifications */ virtio_queue_set_notification(vq, 0); return progress; }