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diff --git a/tools/runonphone/symbianutils/callback.h b/tools/runonphone/symbianutils/callback.h
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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DEBUGGER_CALLBACK_H
+#define DEBUGGER_CALLBACK_H
+
+#include "symbianutils_global.h"
+
+namespace trk {
+namespace Internal {
+
+/* Helper class for the 1-argument functor:
+ * Cloneable base class for the implementation which is
+ * invokeable with the argument. */
+template <class Argument>
+class CallbackImplBase
+{
+    Q_DISABLE_COPY(CallbackImplBase)
+public:
+    CallbackImplBase() {}
+    virtual CallbackImplBase *clone() const = 0;
+    virtual void invoke(Argument a) = 0;
+    virtual ~CallbackImplBase() {}
+};
+
+/* Helper class for the 1-argument functor: Implementation for
+ * a class instance with a member function pointer. */
+template <class Class, class Argument>
+class CallbackMemberPtrImpl : public CallbackImplBase<Argument>
+{
+public:
+    typedef void (Class::*MemberFuncPtr)(Argument);
+
+    CallbackMemberPtrImpl(Class *instance,
+                          MemberFuncPtr memberFunc) :
+                          m_instance(instance),
+                          m_memberFunc(memberFunc) {}
+
+    virtual CallbackImplBase<Argument> *clone() const
+    {
+        return new CallbackMemberPtrImpl<Class, Argument>(m_instance, m_memberFunc);
+    }
+
+    virtual void invoke(Argument a)
+        { (m_instance->*m_memberFunc)(a); }
+private:
+    Class *m_instance;
+    MemberFuncPtr m_memberFunc;
+};
+
+} // namespace Internal
+
+/* Default-constructible, copyable 1-argument functor providing an
+ * operator()(Argument) that invokes a member function of a class:
+ * \code
+class Foo {
+public:
+    void print(const std::string &);
+};
+...
+Foo foo;
+Callback<const std::string &> f1(&foo, &Foo::print);
+f1("test");
+\endcode */
+
+template <class Argument>
+class Callback
+{
+public:
+    Callback() : m_impl(0) {}
+
+    template <class Class>
+    Callback(Class *instance, void (Class::*memberFunc)(Argument)) :
+        m_impl(new Internal::CallbackMemberPtrImpl<Class,Argument>(instance, memberFunc))
+    {}
+
+    ~Callback()
+    {
+        clean();
+    }
+
+    Callback(const Callback &rhs) :
+        m_impl(0)
+    {
+        if (rhs.m_impl)
+            m_impl = rhs.m_impl->clone();
+    }
+
+    Callback &operator=(const Callback &rhs)
+    {
+        if (this != &rhs) {
+            clean();
+            if (rhs.m_impl)
+                m_impl = rhs.m_impl->clone();
+        }
+        return *this;
+    }
+
+    bool isNull() const { return m_impl == 0; }
+    operator bool() const { return !isNull(); }
+
+    void operator()(Argument a)
+    {
+        if (m_impl)
+            m_impl->invoke(a);
+    }
+
+private:
+    void clean()
+    {
+        if (m_impl) {
+            delete m_impl;
+            m_impl = 0;
+        }
+    }
+
+    Internal::CallbackImplBase<Argument> *m_impl;
+};
+
+} // namespace trk
+
+#endif // DEBUGGER_CALLBACK_H