.name = "cons",
};
+struct ao_lisp_cons *ao_lisp_cons_free_list;
+
struct ao_lisp_cons *
ao_lisp_cons_cons(ao_poly car, struct ao_lisp_cons *cdr)
{
struct ao_lisp_cons *cons;
- ao_lisp_poly_stash(0, car);
- ao_lisp_cons_stash(0, cdr);
- cons = ao_lisp_alloc(sizeof (struct ao_lisp_cons));
- car = ao_lisp_poly_fetch(0);
- cdr = ao_lisp_cons_fetch(0);
- if (!cons)
- return NULL;
+ if (ao_lisp_cons_free_list) {
+ cons = ao_lisp_cons_free_list;
+ ao_lisp_cons_free_list = ao_lisp_poly_cons(cons->cdr);
+ } else {
+ ao_lisp_poly_stash(0, car);
+ ao_lisp_cons_stash(0, cdr);
+ cons = ao_lisp_alloc(sizeof (struct ao_lisp_cons));
+ car = ao_lisp_poly_fetch(0);
+ cdr = ao_lisp_cons_fetch(0);
+ if (!cons)
+ return NULL;
+ }
cons->car = car;
cons->cdr = ao_lisp_cons_poly(cdr);
return cons;
}
+void
+ao_lisp_cons_free(struct ao_lisp_cons *cons)
+{
+ while (cons) {
+ ao_poly cdr = cons->cdr;
+ cons->cdr = ao_lisp_cons_poly(ao_lisp_cons_free_list);
+ ao_lisp_cons_free_list = cons;
+ cons = ao_lisp_poly_cons(cdr);
+ }
+}
+
void
ao_lisp_cons_print(ao_poly c)
{