BIO_POLL_DESCRIPTOR_TYPE_NONE
d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE;
rtor->poll_r.type = BIO_POLL_DESCRIPTOR_TYPE_NONE;
rtor->poll_w.type = BIO_POLL_DESCRIPTOR_TYPE_NONE;
rtor->poll_r.type = BIO_POLL_DESCRIPTOR_TYPE_NONE;
rtor->poll_w.type = BIO_POLL_DESCRIPTOR_TYPE_NONE;
if (d == NULL || d->type == BIO_POLL_DESCRIPTOR_TYPE_NONE) {