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diff --git a/src/corelib/thread/qexception.cpp b/src/corelib/thread/qexception.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qexception.h"
+#include "QtCore/qshareddata.h"
+
+#ifndef QT_NO_QFUTURE
+#ifndef QT_NO_EXCEPTIONS
+
+QT_BEGIN_NAMESPACE
+
+/*! 
+    \class QException
+    \brief The QException class provides a base class for exceptions that can transferred across threads.
+    \since 5.0
+
+    Qt Concurrent supports throwing and catching exceptions across thread
+    boundaries, provided that the exception inherit from QException
+    and implement two helper functions:
+
+    \snippet code/src_corelib_thread_qexception.cpp 0
+
+    QException subclasses must be thrown by value and
+    caught by reference:
+
+    \snippet code/src_corelib_thread_qexception.cpp 1
+
+    If you throw an exception that is not a subclass of QException,
+    the Qt functions will throw a QUnhandledException
+    in the receiver thread.
+
+    When using QFuture, transferred exceptions will be thrown when calling the following functions:
+    \list
+    \li QFuture::waitForFinished()
+    \li QFuture::result()
+    \li QFuture::resultAt()
+    \li QFuture::results()
+    \endlist
+*/
+
+/*!
+    \fn QException::raise() const
+    In your QException subclass, reimplement raise() like this:
+
+    \snippet code/src_corelib_thread_qexception.cpp 2
+*/
+
+/*!
+    \fn QException::clone() const
+    In your QException subclass, reimplement clone() like this:
+
+    \snippet code/src_corelib_thread_qexception.cpp 3
+*/
+
+/*! 
+    \class QUnhandledException
+
+    \brief The UnhandledException class represents an unhandled exception in a worker thread.
+    \since 5.0
+
+    If a worker thread throws an exception that is not a subclass of QException,
+    the Qt functions will throw a QUnhandledException
+    on the receiver thread side.
+
+    Inheriting from this class is not supported.
+*/
+
+/*!
+    \fn QUnhandledException::raise() const
+    \internal
+*/
+
+/*!
+    \fn QUnhandledException::clone() const
+    \internal
+*/
+
+void QException::raise() const
+{
+    QException e = *this;
+    throw e;
+}
+
+QException *QException::clone() const
+{
+    return new QException(*this);
+}
+
+void QUnhandledException::raise() const
+{
+    QUnhandledException e = *this;
+    throw e;
+}
+
+QUnhandledException *QUnhandledException::clone() const
+{
+    return new QUnhandledException(*this);
+}
+
+#ifndef qdoc
+
+namespace QtPrivate {
+
+class Base : public QSharedData
+{
+public:
+    Base(QException *exception)
+    : exception(exception), hasThrown(false) { }
+    ~Base() { delete exception; }
+
+    QException *exception;
+    bool hasThrown;
+};
+
+ExceptionHolder::ExceptionHolder(QException *exception)
+: base(new Base(exception)) {}
+
+ExceptionHolder::ExceptionHolder(const ExceptionHolder &other)
+: base(other.base)
+{}
+
+void ExceptionHolder::operator=(const ExceptionHolder &other)
+{
+    base = other.base;
+}
+
+ExceptionHolder::~ExceptionHolder()
+{}
+
+QException *ExceptionHolder::exception() const
+{
+    return base->exception;
+}
+
+void ExceptionStore::setException(const QException &e)
+{
+    if (hasException() == false)
+        exceptionHolder = ExceptionHolder(e.clone());
+}
+
+bool ExceptionStore::hasException() const
+{
+    return (exceptionHolder.exception() != 0);
+}
+
+ExceptionHolder ExceptionStore::exception()
+{
+    return exceptionHolder;
+}
+
+void ExceptionStore::throwPossibleException()
+{
+    if (hasException() ) {
+        exceptionHolder.base->hasThrown = true;
+        exceptionHolder.exception()->raise();
+    }
+}
+
+bool ExceptionStore::hasThrown() const { return exceptionHolder.base->hasThrown; }
+
+} // namespace QtPrivate
+
+#endif //qdoc
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_EXCEPTIONS
+#endif // QT_NO_QFUTURE