Exemple #1
0
/**
 * Compare two abstract data objects.
 * @arg a		Abstract data object.
 * @arg b		Another abstract data object.
 * @return An integer less than, equal to, or greater than zero if
 *         a is found, respectively, to be less than, to match, or
 *         be greater than b.
 */
int nl_data_cmp(struct nl_data *a, struct nl_data *b)
{
    void *a_ = nl_data_get(a);
    void *b_ = nl_data_get(b);

    if (a_ && b_)
        return memcmp(a_, b_, nl_data_get_size(a));
    else
        return -1;
}
void *rtnl_cls_data(struct rtnl_cls *cls)
{
	if (!cls->c_subdata) {
		struct rtnl_cls_ops *ops = cls->c_ops;

		if (!ops) {
			if (!cls->c_kind[0])
				BUG();

			ops = __rtnl_cls_lookup_ops(cls->c_kind);
			if (ops == NULL)
				return NULL;

			cls->c_ops = ops;
		}

		if (!ops->co_size)
			BUG();

		if (!(cls->c_subdata = nl_data_alloc(NULL, ops->co_size)))
			return NULL;
	}

	return nl_data_get(cls->c_subdata);
}