_exthdlr_t
_exthdlr_t *head;
(sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))];
_exthdlr_t *p;
if ((p = lmalloc(sizeof (_exthdlr_t))) == NULL)
_exthdlr_t *p, *o;
lfree(p, sizeof (_exthdlr_t));
_exthdlr_t *o; /* previous node */
_exthdlr_t *p; /* this node */
lfree(p, sizeof (_exthdlr_t));