diff -r 000000000000 -r 1918ee327afb tests/auto/selftests/alive/qtestalive.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/auto/selftests/alive/qtestalive.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,159 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite 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 <qcoreapplication.h>
+#include <qcoreevent.h>
+#include <qthread.h>
+
+class QTestAliveEvent: public QEvent
+{
+public:
+
+    enum { AliveEventType = QEvent::User + 422 };
+
+    inline QTestAliveEvent(int aSequenceId)
+        : QEvent(QEvent::Type(AliveEventType)), seqId(aSequenceId)
+    {}
+    inline int sequenceId() const { return seqId; }
+
+private:
+    int seqId;
+};
+
+class QTestAlivePinger: public QObject
+{
+public:
+    QTestAlivePinger(QObject *receiver, QObject *parent = 0);
+    bool event(QEvent *e);
+
+protected:
+    void timerEvent(QTimerEvent *event);
+
+private:
+    QObject *rec;
+    int timerId;
+    int currentSequenceId;
+    int lastSequenceId;
+};
+
+QTestAlivePinger::QTestAlivePinger(QObject *receiver, QObject *parent)
+    : QObject(parent), rec(receiver), currentSequenceId(0), lastSequenceId(0)
+{
+    Q_ASSERT(rec);
+    timerId = startTimer(850);
+}
+
+bool QTestAlivePinger::event(QEvent *event)
+{
+    // pong received
+    if (int(event->type()) == QTestAliveEvent::AliveEventType) {
+        QTestAliveEvent *e = static_cast<QTestAliveEvent *>(event);
+        //qDebug("PONG %d received", e->sequenceId());
+        // if the events are not delivered in order, we don't care.
+        if (e->sequenceId() > lastSequenceId)
+            lastSequenceId = e->sequenceId();
+        return true;
+    }
+    return QObject::event(event);
+}
+
+void QTestAlivePinger::timerEvent(QTimerEvent *event)
+{
+    if (event->timerId() != timerId)
+        return;
+
+    if (lastSequenceId < currentSequenceId - 2) {
+        qWarning("TEST LAGS %d PINGS behind!", currentSequenceId - lastSequenceId);
+    }
+    ++currentSequenceId;
+    //qDebug("PING %d", currentSequenceId);
+    QCoreApplication::postEvent(rec, new QTestAliveEvent(currentSequenceId));
+}
+
+class QTestAlive: public QThread
+{
+public:
+    QTestAlive(QObject *parent = 0);
+    ~QTestAlive();
+    void run();
+
+    bool event(QEvent *e);
+
+private:
+    QTestAlivePinger *pinger;
+};
+
+QTestAlive::QTestAlive(QObject *parent)
+    : QThread(parent), pinger(0)
+{
+}
+
+QTestAlive::~QTestAlive()
+{
+    quit();
+    while (isRunning());
+}
+
+bool QTestAlive::event(QEvent *e)
+{
+    if (int(e->type()) == QTestAliveEvent::AliveEventType && pinger) {
+        // ping received, send back the pong
+        //qDebug("PONG %d", static_cast<QTestAliveEvent *>(e)->sequenceId());
+        QCoreApplication::postEvent(pinger,
+                new QTestAliveEvent(static_cast<QTestAliveEvent *>(e)->sequenceId()));
+        return true;
+    }
+    return QThread::event(e);
+}
+
+void QTestAlive::run()
+{
+    Q_ASSERT_X(QCoreApplication::instance(), "QTestAlive::run()",
+               "Cannot start QTestAlive without a QCoreApplication instance.");
+
+    QTestAlivePinger p(this);
+    pinger = &p;
+    exec();
+    pinger = 0;
+}
+
+