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diff --git a/include/framework/iguard.hxx b/include/framework/iguard.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF 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 .
+ */
+
+#ifndef __FRAMEWORK_THREADHELP_IGUARD_H_
+#define __FRAMEWORK_THREADHELP_IGUARD_H_
+
+#include <sal/types.h>
+
+namespace framework{
+
+/*-************************************************************************************************************//**
+    @descr          interface for guarding a lock
+*//*-*************************************************************************************************************/
+class SAL_NO_VTABLE IGuard
+{
+    //-------------------------------------------------------------------------------------------------------------
+    //  public methods
+    //-------------------------------------------------------------------------------------------------------------
+    public:
+
+        /** clears the lock. If the guard does not currently hold the lock, nothing happens.
+        */
+        virtual void clear() = 0;
+
+        /** attempts to re-establishes the lock, blocking until the attempt is successful.
+        */
+        virtual void reset() = 0;
+
+    protected:
+        ~IGuard() {}
+
+};      //  class IGuard
+
+}       //  namespace framework
+
+#endif  //  #ifndef __FRAMEWORK_THREADHELP_IGUARD_H_
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */