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diff --git a/tools/runonphone/symbianutils/virtualserialdevice.cpp b/tools/runonphone/symbianutils/virtualserialdevice.cpp
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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 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "virtualserialdevice.h"
+#include <QtCore/QThread>
+#include <QtCore/QWaitCondition>
+
+namespace SymbianUtils {
+
+bool VirtualSerialDevice::isSequential() const
+{
+    return true;
+}
+
+VirtualSerialDevice::VirtualSerialDevice(const QString &aPortName, QObject *parent) :
+    QIODevice(parent), portName(aPortName), lock(QMutex::NonRecursive), emittingBytesWritten(false), waiterForBytesWritten(NULL)
+{
+    platInit();
+}
+
+const QString& VirtualSerialDevice::getPortName() const
+{
+    return portName;
+}
+
+void VirtualSerialDevice::close()
+{
+    if (isOpen()) {
+        QMutexLocker locker(&lock);
+        delete waiterForBytesWritten;
+        waiterForBytesWritten = NULL;
+        QIODevice::close();
+        platClose();
+    }
+}
+
+void VirtualSerialDevice::emitBytesWrittenIfNeeded(QMutexLocker& locker, qint64 len)
+{
+    if (waiterForBytesWritten) {
+        waiterForBytesWritten->wakeAll();
+    }
+    if (!emittingBytesWritten) {
+        emittingBytesWritten = true;
+        locker.unlock();
+        emit bytesWritten(len);
+        locker.relock();
+        emittingBytesWritten = false;
+    }
+}
+
+} // namespace SymbianUtils