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diff --git a/framework/inc/threadhelp/irwlock.h b/framework/inc/threadhelp/irwlock.h
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef __FRAMEWORK_THREADHELP_IRWLOCK_H_
+#define __FRAMEWORK_THREADHELP_IRWLOCK_H_
+
+//_________________________________________________________________________________________________________________
+//  includes
+//_________________________________________________________________________________________________________________
+
+//_________________________________________________________________________________________________________________
+//  namespace
+//_________________________________________________________________________________________________________________
+
+namespace framework{
+
+//_________________________________________________________________________________________________________________
+//  declarations
+//_________________________________________________________________________________________________________________
+
+/*-************************************************************************************************************//**
+    @descr          A guard (specialy a write guard) support different internal working states.
+                    His lock can set for reading or writing/reading! Or he was unlocked by user ...
+*//*-*************************************************************************************************************/
+enum ELockMode
+{
+    E_NOLOCK    ,
+    E_READLOCK  ,
+    E_WRITELOCK
+};
+
+/*-************************************************************************************************************//**
+    @descr          We implement two guards for using an rw-lock. But if you wish to implement
+                    different rw-locks to you will have problems by using with same guard implementation!
+                    Thats why we define this "pure virtual base class" ...
+                    All rw-locks must support this base interface for working and all guard must use this one too!
+*//*-*************************************************************************************************************/
+class IRWLock
+{
+    //-------------------------------------------------------------------------------------------------------------
+    //  public methods
+    //-------------------------------------------------------------------------------------------------------------
+    public:
+
+        /*-****************************************************************************************************//**
+            @descr      These functions must be supported by a derived class!
+                            acquireReadAccess()     -try to register thread as reader
+                            releaseReadAccess()     -unregister thread as reader
+                            acquireWriteAccess()    -try to register thread as writer
+                            releaseWriteAccess()    -unregister thread as writer
+                            downgradeWriteAccess()  -make writer to reader
+        *//*-*****************************************************************************************************/
+        virtual void acquireReadAccess    () =0;
+        virtual void releaseReadAccess    () =0;
+        virtual void acquireWriteAccess   () =0;
+        virtual void releaseWriteAccess   () =0;
+        virtual void downgradeWriteAccess () =0;
+
+};      //  class IRWLock
+
+}       //  namespace framework
+
+#endif  //  #ifndef __FRAMEWORK_THREADHELP_IRWLOCK_H_