90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the Qt Solutions component.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qtsinglecoreapplication.h"
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#include <QDebug>
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void report(const QString& msg)
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{
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qDebug("[%i] %s", (int)QCoreApplication::applicationPid(), qPrintable(msg));
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}
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class MainClass : public QObject
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{
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Q_OBJECT
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public:
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MainClass()
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: QObject()
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{}
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public slots:
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void handleMessage(const QString& message)
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{
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report( "Message received: \"" + message + "\"");
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}
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};
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int main(int argc, char **argv)
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{
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report("Starting up");
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QtSingleCoreApplication app(argc, argv);
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if (app.isRunning()) {
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QString msg(QString("Hi master, I am %1.").arg(QCoreApplication::applicationPid()));
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bool sentok = app.sendMessage(msg, 2000);
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QString rep("Another instance is running, so I will exit.");
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rep += sentok ? " Message sent ok." : " Message sending failed; the other instance may be frozen.";
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report(rep);
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return 0;
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} else {
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report("No other instance is running; so I will.");
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MainClass mainObj;
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QObject::connect(&app, SIGNAL(messageReceived(const QString&)),
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&mainObj, SLOT(handleMessage(const QString&)));
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return app.exec();
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}
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}
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#include "main.moc"
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