this will be paid later

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diff --git a/libs/qtsingleapplication/src/qtlockedfile.cpp b/libs/qtsingleapplication/src/qtlockedfile.cpp
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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 a Qt Solutions component.
+**
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+****************************************************************************/
+
+#include "qtlockedfile.h"
+
+/*!
+    \class QtLockedFile
+
+    \brief The QtLockedFile class extends QFile with advisory locking
+    functions.
+
+    A file may be locked in read or write mode. Multiple instances of
+    \e QtLockedFile, created in multiple processes running on the same
+    machine, may have a file locked in read mode. Exactly one instance
+    may have it locked in write mode. A read and a write lock cannot
+    exist simultaneously on the same file.
+
+    The file locks are advisory. This means that nothing prevents
+    another process from manipulating a locked file using QFile or
+    file system functions offered by the OS. Serialization is only
+    guaranteed if all processes that access the file use
+    QLockedFile. Also, while holding a lock on a file, a process
+    must not open the same file again (through any API), or locks
+    can be unexpectedly lost.
+
+    The lock provided by an instance of \e QtLockedFile is released
+    whenever the program terminates. This is true even when the
+    program crashes and no destructors are called.
+*/
+
+/*! \enum QtLockedFile::LockMode
+
+    This enum describes the available lock modes.
+
+    \value ReadLock A read lock.
+    \value WriteLock A write lock.
+    \value NoLock Neither a read lock nor a write lock.
+*/
+
+/*!
+    Constructs an unlocked \e QtLockedFile object. This constructor
+    behaves in the same way as \e QFile::QFile().
+
+    \sa QFile::QFile()
+*/
+QtLockedFile::QtLockedFile()
+    : QFile()
+{
+#ifdef Q_OS_WIN
+    wmutex = 0;
+    rmutex = 0;
+#endif
+    m_lock_mode = NoLock;
+}
+
+/*!
+    Constructs an unlocked QtLockedFile object with file \a name. This
+    constructor behaves in the same way as \e QFile::QFile(const
+    QString&).
+
+    \sa QFile::QFile()
+*/
+QtLockedFile::QtLockedFile(const QString &name)
+    : QFile(name)
+{
+#ifdef Q_OS_WIN
+    wmutex = 0;
+    rmutex = 0;
+#endif
+    m_lock_mode = NoLock;
+}
+
+/*!
+  Opens the file in OpenMode \a mode.
+
+  This is identical to QFile::open(), with the one exception that the
+  Truncate mode flag is disallowed. Truncation would conflict with the
+  advisory file locking, since the file would be modified before the
+  write lock is obtained. If truncation is required, use resize(0)
+  after obtaining the write lock.
+
+  Returns true if successful; otherwise false.
+
+  \sa QFile::open(), QFile::resize()
+*/
+bool QtLockedFile::open(OpenMode mode)
+{
+    if (mode & QIODevice::Truncate) {
+        qWarning("QtLockedFile::open(): Truncate mode not allowed.");
+        return false;
+    }
+    return QFile::open(mode);
+}
+
+/*!
+    Returns \e true if this object has a in read or write lock;
+    otherwise returns \e false.
+
+    \sa lockMode()
+*/
+bool QtLockedFile::isLocked() const
+{
+    return m_lock_mode != NoLock;
+}
+
+/*!
+    Returns the type of lock currently held by this object, or \e
+    QtLockedFile::NoLock.
+
+    \sa isLocked()
+*/
+QtLockedFile::LockMode QtLockedFile::lockMode() const
+{
+    return m_lock_mode;
+}
+
+/*!
+    \fn bool QtLockedFile::lock(LockMode mode, bool block = true)
+
+    Obtains a lock of type \a mode. The file must be opened before it
+    can be locked.
+
+    If \a block is true, this function will block until the lock is
+    aquired. If \a block is false, this function returns \e false
+    immediately if the lock cannot be aquired.
+
+    If this object already has a lock of type \a mode, this function
+    returns \e true immediately. If this object has a lock of a
+    different type than \a mode, the lock is first released and then a
+    new lock is obtained.
+
+    This function returns \e true if, after it executes, the file is
+    locked by this object, and \e false otherwise.
+
+    \sa unlock(), isLocked(), lockMode()
+*/
+
+/*!
+    \fn bool QtLockedFile::unlock()
+
+    Releases a lock.
+
+    If the object has no lock, this function returns immediately.
+
+    This function returns \e true if, after it executes, the file is
+    not locked by this object, and \e false otherwise.
+
+    \sa lock(), isLocked(), lockMode()
+*/
+
+/*!
+    \fn QtLockedFile::~QtLockedFile()
+
+    Destroys the \e QtLockedFile object. If any locks were held, they
+    are released.
+*/