-#if USE_DLMALLOC == 0
- mheap_t *h = mheap_header (am->hash_lookup_mheap);
- if (on) {
- h->flags |= MHEAP_FLAG_VALIDATE;
- h->flags &= ~MHEAP_FLAG_SMALL_OBJECT_CACHE;
- mheap_validate(h);
- } else {
- h->flags &= ~MHEAP_FLAG_VALIDATE;
- h->flags |= MHEAP_FLAG_SMALL_OBJECT_CACHE;
- }
-#endif