    element           515 libdb/queue.h  	struct quehead *element = a, *head = b;
    element           517 libdb/queue.h  	element->qh_link = head->qh_link;
    element           518 libdb/queue.h  	element->qh_rlink = head;
    element           519 libdb/queue.h  	head->qh_link = element;
    element           520 libdb/queue.h  	element->qh_link->qh_rlink = element;
    element           526 libdb/queue.h  	struct quehead *element = a;
    element           528 libdb/queue.h  	element->qh_link->qh_rlink = element->qh_rlink;
    element           529 libdb/queue.h  	element->qh_rlink->qh_link = element->qh_link;
    element           530 libdb/queue.h  	element->qh_rlink = 0;