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diff --git a/ext/systemc/src/sysc/communication/sc_semaphore_if.h b/ext/systemc/src/sysc/communication/sc_semaphore_if.h
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+/*****************************************************************************
+
+  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+  more contributor license agreements.  See the NOTICE file distributed
+  with this work for additional information regarding copyright ownership.
+  Accellera licenses this file to you under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.  See the License for the specific language governing
+  permissions and limitations under the License.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  sc_semaphore_if.h -- The sc_semaphore_if interface class.
+
+  Original Author: Martin Janssen, Synopsys, Inc., 2001-05-21
+
+  CHANGE LOG IS AT THE END OF THE FILE
+ *****************************************************************************/
+
+#ifndef SC_SEMAPHORE_IF_H
+#define SC_SEMAPHORE_IF_H
+
+#include "sysc/communication/sc_interface.h"
+
+namespace sc_core {
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_semaphore_if
+//
+//  The sc_semaphore_if interface class.
+// ----------------------------------------------------------------------------
+
+class sc_semaphore_if
+: virtual public sc_interface
+{
+public:
+
+    // the classical operations: wait(), trywait(), and post()
+
+    // lock (take) the semaphore, block if not available
+    virtual int wait() = 0;
+
+    // lock (take) the semaphore, return -1 if not available
+    virtual int trywait() = 0;
+
+    // unlock (give) the semaphore
+    virtual int post() = 0;
+
+    // get the value of the semphore
+    virtual int get_value() const = 0;
+
+protected:
+
+    // constructor
+
+    sc_semaphore_if()
+	{}
+
+private:
+
+    // disabled
+    sc_semaphore_if( const sc_semaphore_if& );
+    sc_semaphore_if& operator = ( const sc_semaphore_if& );
+};
+
+} // namespace sc_core
+
+//$Log: sc_semaphore_if.h,v $
+//Revision 1.3  2011/08/26 20:45:42  acg
+// Andy Goodrich: moved the modification log to the end of the file to
+// eliminate source line number skew when check-ins are done.
+//
+//Revision 1.2  2011/02/18 20:23:45  acg
+// Andy Goodrich: Copyright update.
+//
+//Revision 1.1.1.1  2006/12/15 20:20:04  acg
+//SystemC 2.3
+//
+//Revision 1.2  2006/01/03 23:18:26  acg
+//Changed copyright to include 2006.
+//
+//Revision 1.1.1.1  2005/12/19 23:16:43  acg
+//First check in of SystemC 2.1 into its own archive.
+//
+//Revision 1.8  2005/06/10 22:43:55  acg
+//Added CVS change log annotation.
+//
+
+#endif
+
+// Taf!