+#if VMG_UVAR
+STATIC OP *vmg_pp_resetuvar(pTHX) {
+ SvRMAGICAL_on(cSVOP_sv);
+ return NORMAL;
+}
+
+STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
+ struct ufuncs *uf;
+ MAGIC *mg, *umg;
+ SV *key = NULL, *newkey = NULL;
+ int tied = 0;
+
+ umg = mg_find(sv, PERL_MAGIC_uvar);
+ /* umg can't be NULL or we wouldn't be there. */
+ key = umg->mg_obj;
+ uf = (struct ufuncs *) umg->mg_ptr;
+
+ if (uf[1].uf_val)
+ uf[1].uf_val(aTHX_ action, sv);
+ if (uf[1].uf_set)
+ uf[1].uf_set(aTHX_ action, sv);
+
+ action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
+ for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+ const MGWIZ *w;
+ switch (mg->mg_type) {
+ case PERL_MAGIC_ext:
+ break;
+ case PERL_MAGIC_tied:
+ ++tied;
+ continue;
+ default:
+ continue;
+ }
+ if (mg->mg_private != SIG_WIZ) continue;
+ w = SV2MGWIZ(mg->mg_ptr);
+ switch (w->uvar) {
+ case 0:
+ continue;
+ case 2:
+ if (!newkey)
+ newkey = key = umg->mg_obj = sv_mortalcopy(umg->mg_obj);
+ }
+ switch (action) {
+ case 0:
+ if (w->cb_fetch)
+ vmg_cb_call2(w->cb_fetch, w->opinfo, sv, mg->mg_obj, key);
+ break;
+ case HV_FETCH_ISSTORE:
+ case HV_FETCH_LVALUE:
+ case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
+ if (w->cb_store)
+ vmg_cb_call2(w->cb_store, w->opinfo, sv, mg->mg_obj, key);
+ break;
+ case HV_FETCH_ISEXISTS:
+ if (w->cb_exists)
+ vmg_cb_call2(w->cb_exists, w->opinfo, sv, mg->mg_obj, key);
+ break;
+ case HV_DELETE:
+ if (w->cb_delete)
+ vmg_cb_call2(w->cb_delete, w->opinfo, sv, mg->mg_obj, key);
+ break;
+ }
+ }
+
+ if (SvRMAGICAL(sv) && !tied) {
+ /* Temporarily hide the RMAGICAL flag of the hash so it isn't wrongly
+ * mistaken for a tied hash by the rest of hv_common. It will be reset by
+ * the op_ppaddr of a new fake op injected between the current and the next
+ * one. */
+ OP *o = PL_op;
+ if (!o->op_next || o->op_next->op_ppaddr != vmg_pp_resetuvar) {
+ SVOP *svop;
+ NewOp(1101, svop, 1, SVOP);
+ svop->op_type = OP_STUB;
+ svop->op_ppaddr = vmg_pp_resetuvar;
+ svop->op_next = o->op_next;
+ svop->op_flags = 0;
+ svop->op_sv = sv;
+ o->op_next = (OP *) svop;
+ }
+ SvRMAGICAL_off(sv);
+ }
+
+ return 0;
+}
+#endif /* VMG_UVAR */
+