node_el_t
static node_el_t *
node_el_t *ptr = malloc(sizeof (node_el_t));
delete_node_el(node_el_t *pel)
node_el_t *pel;
node_el_t *pel = create_node_el(nodeh);
static node_el_t *create_node_el(picl_nodehdl_t nodeh);
static void delete_node_el(node_el_t *pel);
node_el_t *head;
node_el_t *tail;