--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/shared/generationCounters.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2002-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// A GenerationCounter is a holder class for performance counters
+// that track a generation
+
+class GenerationCounters: public CHeapObj {
+  friend class VMStructs;
+
+ protected:
+  PerfVariable*      _current_size;
+  VirtualSpace*      _virtual_space;
+
+  // Constant PerfData types don't need to retain a reference.
+  // However, it's a good idea to document them here.
+  // PerfStringConstant*     _name;
+  // PerfConstant*           _min_size;
+  // PerfConstant*           _max_size;
+  // PerfConstant*           _spaces;
+
+  char*              _name_space;
+
+  // This constructor is only meant for use with the PSGenerationCounters
+  // constructor.  The need for such an constructor should be eliminated
+  // when VirtualSpace and PSVirtualSpace are unified.
+  GenerationCounters() : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {}
+ public:
+
+  GenerationCounters(const char* name, int ordinal, int spaces,
+                     VirtualSpace* v);
+
+  ~GenerationCounters() {
+    if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
+  }
+
+  virtual void update_all() {
+    _current_size->set_value(_virtual_space->committed_size());
+  }
+
+  const char* name_space() const        { return _name_space; }
+};