--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/gc_implementation/g1/heapRegionSets.hpp	Thu Jan 20 13:57:12 2011 -0800
@@ -0,0 +1,86 @@
+/*
+ * copyright (c) 2011, 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_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSETS_HPP
+#define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSETS_HPP
+
+#include "gc_implementation/g1/heapRegionSet.inline.hpp"
+
+//////////////////// FreeRegionList ////////////////////
+
+class FreeRegionList : public HeapRegionLinkedList {
+protected:
+  virtual const char* verify_region_extra(HeapRegion* hr);
+
+  virtual bool regions_humongous() { return false; }
+  virtual bool regions_empty()     { return true;  }
+
+public:
+  FreeRegionList(const char* name) : HeapRegionLinkedList(name) { }
+};
+
+//////////////////// MasterFreeRegionList ////////////////////
+
+class MasterFreeRegionList : public FreeRegionList {
+protected:
+  virtual bool check_mt_safety();
+
+public:
+  MasterFreeRegionList(const char* name) : FreeRegionList(name) { }
+};
+
+//////////////////// SecondaryFreeRegionList ////////////////////
+
+class SecondaryFreeRegionList : public FreeRegionList {
+protected:
+  virtual bool check_mt_safety();
+
+public:
+  SecondaryFreeRegionList(const char* name) : FreeRegionList(name) { }
+};
+
+//////////////////// HumongousRegionSet ////////////////////
+
+class HumongousRegionSet : public HeapRegionSet {
+protected:
+  virtual const char* verify_region_extra(HeapRegion* hr);
+
+  virtual bool regions_humongous() { return true;  }
+  virtual bool regions_empty()     { return false; }
+
+public:
+  HumongousRegionSet(const char* name) : HeapRegionSet(name) { }
+};
+
+//////////////////// MasterHumongousRegionSet ////////////////////
+
+class MasterHumongousRegionSet : public HumongousRegionSet {
+protected:
+  virtual bool check_mt_safety();
+
+public:
+  MasterHumongousRegionSet(const char* name) : HumongousRegionSet(name) { }
+};
+
+#endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSETS_HPP