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diff --git a/include/comphelper/sharedmutex.hxx b/include/comphelper/sharedmutex.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 INCLUDED_COMPHELPER_SHAREDMUTEX_HXX
+#define INCLUDED_COMPHELPER_SHAREDMUTEX_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <memory>
+
+namespace osl { class Mutex; }
+
+namespace comphelper
+{
+
+
+    //= SharedMutex
+
+    class COMPHELPER_DLLPUBLIC SharedMutex
+    {
+    public:
+        SharedMutex();
+
+        operator ::osl::Mutex& () { return *m_pMutexImpl; }
+
+    private:
+        std::shared_ptr< ::osl::Mutex >  m_pMutexImpl;
+    };
+
+
+    //= SharedMutexBase
+
+    /** sometimes, it's necessary to have an initialized ::osl::Mutex to pass
+        to some ctor call of your base class. In this case, you can't hold the
+        SharedMutex as member, but you need to move it into another base class,
+        which is initialized before the mutex-requiring class is.
+    */
+    class COMPHELPER_DLLPUBLIC SharedMutexBase
+    {
+    protected:
+        SharedMutexBase()
+        {
+        }
+        ~SharedMutexBase()
+        {
+        }
+
+    protected:
+        ::osl::Mutex&   getMutex() const { return m_aMutex; }
+        SharedMutex&    getSharedMutex() const { return m_aMutex; }
+
+    private:
+        mutable SharedMutex m_aMutex;
+    };
+
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_SHAREDMUTEX_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */