Function ng_realloc_item

freebsd/netgraph/ng_base.c:3049–3074

* Change type of the queue entry. * Possibly reallocates it from another UMA zone. */

 * Possibly reallocates it from another UMA zone.
 */
static __inline item_p
ng_realloc_item(item_p pitem, int type, int flags)
{
	item_p item;
	int from, to;

	KASSERT((pitem != NULL), ("%s: can't reallocate NULL", __func__));
	KASSERT(((type & ~NGQF_TYPE) == 0),
	    ("%s: incorrect item type: %d", __func__, type));

	from = ((pitem->el_flags & NGQF_TYPE) == NGQF_DATA);
	to = (type == NGQF_DATA);
	if (from != to) {
		/* If reallocation is required do it and copy item. */
		if ((item = ng_alloc_item(type, flags)) == NULL) {
			ng_free_item(pitem);
			return (NULL);
		}
		*item = *pitem;
		ng_free_item(pitem);
	} else
		item = pitem;
	item->el_flags = (item->el_flags & ~NGQF_TYPE) | type;

	return (item);
}

/************************************************************************
			Module routines