    qh_link           506 libdb/queue.h  	struct quehead *qh_link;
    qh_link           517 libdb/queue.h  	element->qh_link = head->qh_link;
    qh_link           519 libdb/queue.h  	head->qh_link = element;
    qh_link           520 libdb/queue.h  	element->qh_link->qh_rlink = element;
    qh_link           528 libdb/queue.h  	element->qh_link->qh_rlink = element->qh_rlink;
    qh_link           529 libdb/queue.h  	element->qh_rlink->qh_link = element->qh_link;