Function ng_realloc_item

lib/ff_ng_base.c:3073–3098

* 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