--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/runtime/monitorChunk.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,58 @@
+/*
+ * Copyright 1997-2000 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.
+ *
+ */
+
+// Data structure for holding monitors for one activation during
+// deoptimization.
+
+class MonitorChunk: public CHeapObj {
+ private:
+  int              _number_of_monitors;
+  BasicObjectLock* _monitors;
+  BasicObjectLock* monitors() const { return _monitors; }
+  MonitorChunk*    _next;
+ public:
+  // Constructor
+  MonitorChunk(int number_on_monitors);
+  ~MonitorChunk();
+
+  // link operations
+  MonitorChunk* next() const                { return _next; }
+  void set_next(MonitorChunk* next)         { _next = next; }
+
+  // Tells whether the monitor chunk is linked into the JavaThread
+  bool is_linked() const                    { return next() != NULL; }
+
+  // Returns the number of monitors
+  int number_of_monitors() const { return _number_of_monitors; }
+
+  // Returns the index'th monitor
+  BasicObjectLock* at(int index)            { assert(index >= 0 && index < number_of_monitors(), "out of bounds check"); return &monitors()[index]; }
+
+
+  // Memory management
+  void oops_do(OopClosure* f);
+
+  // Tells whether the addr point into the monitors.
+  bool contains(void* addr) const           { return (addr >= (void*) monitors()) && (addr <  (void*) (monitors() + number_of_monitors())); }
+};