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diff --git a/src/corelib/io/qfilesystemwatcher_p.h b/src/corelib/io/qfilesystemwatcher_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module 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 QFILESYSTEMWATCHER_P_H
+#define QFILESYSTEMWATCHER_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the QLibrary class.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qfilesystemwatcher.h"
+
+#ifndef QT_NO_FILESYSTEMWATCHER
+
+#include <private/qobject_p.h>
+
+#include <QtCore/qstringlist.h>
+#include <QtCore/qthread.h>
+
+QT_BEGIN_NAMESPACE
+
+class QFileSystemWatcherEngine : public QThread
+{
+    Q_OBJECT
+
+protected:
+    inline QFileSystemWatcherEngine(bool move = true)
+    {
+        if (move)
+            moveToThread(this);
+    }
+
+public:
+    // fills \a files and \a directories with the \a paths it could
+    // watch, and returns a list of paths this engine could not watch
+    virtual QStringList addPaths(const QStringList &paths,
+                                 QStringList *files,
+                                 QStringList *directories) = 0;
+    // removes \a paths from \a files and \a directories, and returns
+    // a list of paths this engine does not know about (either addPath
+    // failed or wasn't called)
+    virtual QStringList removePaths(const QStringList &paths,
+                                    QStringList *files,
+                                    QStringList *directories) = 0;
+
+    virtual void stop() = 0;
+
+Q_SIGNALS:
+    void fileChanged(const QString &path, bool removed);
+    void directoryChanged(const QString &path, bool removed);
+};
+
+class QFileSystemWatcherPrivate : public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QFileSystemWatcher)
+
+    static QFileSystemWatcherEngine *createNativeEngine();
+
+public:
+    QFileSystemWatcherPrivate();
+    void init();
+    void initPollerEngine();
+    void initForcedEngine(const QString &);
+
+    QFileSystemWatcherEngine *native, *poller, *forced;
+    QStringList files, directories;
+
+    // private slots
+    void _q_fileChanged(const QString &path, bool removed);
+    void _q_directoryChanged(const QString &path, bool removed);
+};
+
+
+QT_END_NAMESPACE
+#endif // QT_NO_FILESYSTEMWATCHER
+#endif // QFILESYSTEMWATCHER_P_H