? (size) * sizeof(HE*) \
: (size) * sizeof(HE*) * 2 - MALLOC_OVERHEAD)
#endif
+
+/* available as a function in hv.c */
+#define Perl_sharepvn(sv, len, hash) HEK_KEY(share_hek(sv, len, hash))
+#define sharepvn(sv, len, hash) Perl_sharepvn(sv, len, hash)