--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/memory/metaspace/metaspaceEnums.hpp	Tue Sep 10 09:24:05 2019 +0200
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2019, SAP SE. All rights reserved.
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+#ifndef SHARE_MEMORY_METASPACEENUMS_HPP
+#define SHARE_MEMORY_METASPACEENUMS_HPP
+
+#include "utilities/debug.hpp"
+
+// MetadataType and MetaspaceType, as well as some convenience functions surrounding them.
+namespace metaspace {
+
+///////////////////////
+
+enum MetadataType {
+  ClassType,
+  NonClassType,
+  MetadataTypeCount
+};
+
+inline bool is_class(MetadataType md) { return md == ClassType; }
+
+inline MetadataType mdtype_from_bool(bool is_class) { return is_class ? ClassType : NonClassType; }
+
+const char* describe_mdtype(MetadataType md);
+
+#ifdef ASSERT
+inline bool is_valid_mdtype(MetadataType md) {
+  return (int)md >= 0 && (int)md < MetadataTypeCount;
+}
+inline void check_valid_mdtype(MetadataType md) {
+  assert(is_valid_mdtype(md), "Wrong value for MetadataType: %d", (int) md);
+}
+#endif // ASSERT
+
+///////////////////////
+
+enum MetaspaceType {
+  ZeroMetaspaceType = 0,
+  StandardMetaspaceType = ZeroMetaspaceType,
+  BootMetaspaceType = StandardMetaspaceType + 1,
+  UnsafeAnonymousMetaspaceType = BootMetaspaceType + 1,
+  ReflectionMetaspaceType = UnsafeAnonymousMetaspaceType + 1,
+  MetaspaceTypeCount
+};
+
+const char* describe_spacetype(MetaspaceType st);
+
+#ifdef ASSERT
+inline bool is_valid_spacetype(MetaspaceType st) {
+  return (int)st >= 0 && (int)st < MetaspaceTypeCount;
+}
+inline void check_valid_spacetype(MetaspaceType st) {
+  assert(is_valid_spacetype(st), "Wrong value for MetaspaceType: %d", (int) st);
+}
+#endif
+
+} // namespace metaspace
+
+#endif // SHARE_MEMORY_METASPACEENUMS_HPP