TEMPLATE = app
 CONFIG += console
 SOURCES += main.cpp
 include(../../src/qtsinglecoreapplication.pri)
 QT -= gui

/\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* \*\* \*\* Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). \*\* Contact: http://www.qt-project.org/legal \*\* \*\* This file is part of the 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 "qtsinglecoreapplication.h"
 #include <QtCore/QDebug>

 void report(const QString& msg)
 {
     qDebug("[%i] %s", (int)QCoreApplication::applicationPid(), qPrintable(msg));
 }

 class MainClass : public QObject
 {
     Q_OBJECT
 public:
     MainClass()
         : QObject()
         {}

 public slots:
     void handleMessage(const QString& message)
         {
             report( "Message received: \"" + message + "\"");
         }
 };

 int main(int argc, char **argv)
 {
     report("Starting up");

     QtSingleCoreApplication app(argc, argv);

     if (app.isRunning()) {
         QString msg(QString("Hi master, I am %1.").arg(QCoreApplication::applicationPid()));
         bool sentok = app.sendMessage(msg, 2000);
         QString rep("Another instance is running, so I will exit.");
         rep += sentok ? " Message sent ok." : " Message sending failed; the other instance may be frozen.";
         report(rep);
         return 0;
     } else {
         report("No other instance is running; so I will.");
         MainClass mainObj;
         QObject::connect(&app, SIGNAL(messageReceived(const QString&)),
                          &mainObj, SLOT(handleMessage(const QString&)));
         return app.exec();
     }
 }

 #include "main.moc"