--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/gc_implementation/parallelScavenge/asPSYoungGen.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2003 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.
+ *
+ */
+
+class ASPSYoungGen : public PSYoungGen {
+  friend class VMStructs;
+ private:
+  size_t _gen_size_limit;
+ protected:
+  virtual size_t available_to_live();
+
+ public:
+  ASPSYoungGen(size_t         initial_byte_size,
+               size_t         minimum_byte_size,
+               size_t         byte_size_limit);
+
+  ASPSYoungGen(PSVirtualSpace* vs,
+               size_t         initial_byte_size,
+               size_t         minimum_byte_size,
+               size_t         byte_size_limit);
+
+  void initialize(ReservedSpace rs, size_t alignment);
+  void initialize_virtual_space(ReservedSpace rs, size_t alignment);
+
+  size_t gen_size_limit() { return _gen_size_limit; }
+  void set_gen_size_limit(size_t v) { _gen_size_limit = v; }
+
+  bool resize_generation(size_t eden_size, size_t survivor_size);
+  void resize_spaces(size_t eden_size, size_t survivor_size);
+
+  // Adjust eden to be consistent with the virtual space.
+  void reset_after_change();
+
+  // Adaptive size policy support
+  // Return number of bytes that the generation can expand/contract.
+  size_t available_for_expansion();
+  size_t available_for_contraction();
+
+  // Accessors
+  void set_reserved(MemRegion v) { _reserved = v; }
+
+  // Printing support
+  virtual const char* short_name() const { return "ASPSYoungGen"; }
+};