--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2001-2002 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 PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations
+// to a MutableSpace.
+//
+
+class ObjectStartArray;
+
+class PSMarkSweepDecorator: public CHeapObj {
+ private:
+  static PSMarkSweepDecorator* _destination_decorator;
+
+ protected:
+  MutableSpace* _space;
+  ObjectStartArray* _start_array;
+  HeapWord* _first_dead;
+  HeapWord* _end_of_live;
+  HeapWord* _compaction_top;
+  unsigned int _allowed_dead_ratio;
+
+  bool insert_deadspace(ssize_t& allowed_deadspace_words, HeapWord* q, size_t word_len);
+
+ public:
+  PSMarkSweepDecorator(MutableSpace* space, ObjectStartArray* start_array,
+                       unsigned int allowed_dead_ratio) :
+    _space(space), _start_array(start_array), _allowed_dead_ratio(allowed_dead_ratio) { }
+
+  // During a compacting collection, we need to collapse objects into
+  // spaces in a given order. We want to fill space A, space B, and so
+  // on. The code that controls that order is in the following methods.
+  static void set_destination_decorator_tenured();
+  static void set_destination_decorator_perm_gen();
+  static void advance_destination_decorator();
+  static PSMarkSweepDecorator* destination_decorator();
+
+  // Accessors
+  MutableSpace* space()                           { return _space; }
+  ObjectStartArray* start_array()                 { return _start_array; }
+
+  HeapWord* compaction_top()                      { return _compaction_top; }
+  void set_compaction_top(HeapWord* value)        { _compaction_top = value; }
+
+  unsigned int allowed_dead_ratio()               { return _allowed_dead_ratio; }
+  void set_allowed_dead_ratio(unsigned int value) { _allowed_dead_ratio = value; }
+
+  // Work methods
+  void adjust_pointers();
+  void precompact();
+  void compact(bool mangle_free_space);
+};