+#ifndef ptable_walk
+STATIC void ptable_walk(pTHX_ ptable * const t, void (*cb)(pTHX_ ptable_ent *ent, void *userdata), void *userdata) {
+#define ptable_walk(T, CB, UD) ptable_walk(aTHX_ (T), (CB), (UD))
+ if (t && t->items) {
+ register ptable_ent ** const array = t->ary;
+ UV i = t->max;
+ do {
+ ptable_ent *entry;
+ for (entry = array[i]; entry; entry = entry->next)
+ cb(aTHX_ entry, userdata);
+ } while (i--);
+ }
+}
+#endif /* !ptable_walk */