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diff --git a/src/mem/ruby/tester/BarrierGenerator.hh b/src/mem/ruby/tester/BarrierGenerator.hh
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+
+/*
+ * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * $Id$
+ *
+ * Description:
+ *
+ */
+
+#ifndef BARRIERGENERATOR_H
+#define BARRIERGENERATOR_H
+
+#include "mem/ruby/common/Global.hh"
+#include "mem/ruby/common/Consumer.hh"
+#include "mem/ruby/system/NodeID.hh"
+#include "mem/ruby/common/Address.hh"
+
+class Sequencer;
+class SubBlock;
+class SyntheticDriver;
+
+
+enum BarrierGeneratorStatus {
+  BarrierGeneratorStatus_FIRST,
+  BarrierGeneratorStatus_Thinking = BarrierGeneratorStatus_FIRST,
+  BarrierGeneratorStatus_Test_Pending,
+  BarrierGeneratorStatus_Test_Waiting,
+  BarrierGeneratorStatus_Before_Swap,
+  BarrierGeneratorStatus_Swap_Pending,
+  BarrierGeneratorStatus_Holding,
+  BarrierGeneratorStatus_Release_Pending,
+  BarrierGeneratorStatus_Release_Waiting,
+  BarrierGeneratorStatus_StoreFlag_Waiting,
+  BarrierGeneratorStatus_StoreFlag_Pending,
+  BarrierGeneratorStatus_Done,
+  BarrierGeneratorStatus_SpinFlag_Ready,
+  BarrierGeneratorStatus_SpinFlag_Pending,
+  BarrierGeneratorStatus_LoadBarrierCounter_Pending,
+  BarrierGeneratorStatus_StoreBarrierCounter_Pending,
+  BarrierGeneratorStatus_StoreBarrierCounter_Waiting,
+  BarrierGeneratorStatus_NUM
+};
+
+
+// UNCOMMENT THIS FOR A SINGLE WORK QUEUE
+// static int m_counter;
+
+class BarrierGenerator : public Consumer {
+public:
+  // Constructors
+  BarrierGenerator(NodeID node, SyntheticDriver& driver);
+
+  // Destructor
+  ~BarrierGenerator();
+
+  // Public Methods
+  void wakeup();
+  void performCallback(NodeID proc, SubBlock& data);
+
+  void print(ostream& out) const;
+private:
+  // Private Methods
+  int thinkTime() ;
+  int waitTime() const;
+  void initiateTest();
+  void initiateSwap();
+  void initiateRelease();
+  void initiateLoadCtr();
+  void initiateStoreCtr();
+  void initiateLoadFlag();
+  void initiateStoreFlag();
+  Sequencer* sequencer() const;
+
+  // Private copy constructor and assignment operator
+  BarrierGenerator(const BarrierGenerator& obj);
+  BarrierGenerator& operator=(const BarrierGenerator& obj);
+
+  // Data Members (m_ prefix)
+  SyntheticDriver& m_driver;
+  NodeID m_node;
+  BarrierGeneratorStatus m_status;
+  int proc_counter;
+
+  int m_counter;
+
+  bool m_local_sense;
+  bool m_barrier_done;
+
+  Time m_last_transition;
+  Address m_address;
+
+  int m_total_think;
+  int m_think_periods;
+};
+
+// Output operator declaration
+ostream& operator<<(ostream& out, const BarrierGenerator& obj);
+
+// ******************* Definitions *******************
+
+// Output operator definition
+extern inline
+ostream& operator<<(ostream& out, const BarrierGenerator& obj)
+{
+  obj.print(out);
+  out << flush;
+  return out;
+}
+
+#endif //REQUESTGENERATOR_H
+