diff -r 000000000000 -r 1918ee327afb tests/auto/qsharedpointer/tst_qsharedpointer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/auto/qsharedpointer/tst_qsharedpointer.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,1765 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#define QT_SHAREDPOINTER_TRACK_POINTERS
+#include "qsharedpointer.h"
+#include <QtTest/QtTest>
+#include <QtCore/QThread>
+#include <QtCore/QVector>
+
+#include "externaltests.h"
+#include "wrapper.h"
+
+#include <stdlib.h>
+#include <time.h>
+
+QT_BEGIN_NAMESPACE
+namespace QtSharedPointer {
+    Q_CORE_EXPORT void internalSafetyCheckCleanCheck();
+}
+QT_END_NAMESPACE
+
+#ifdef Q_OS_SYMBIAN
+#define SRCDIR "."
+#endif
+
+class tst_QSharedPointer: public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void basics_data();
+    void basics();
+    void swap();
+    void forwardDeclaration1();
+    void forwardDeclaration2();
+    void memoryManagement();
+    void downCast();
+    void upCast();
+    void qobjectWeakManagement();
+    void noSharedPointerFromWeakQObject();
+    void weakQObjectFromSharedPointer();
+    void objectCast();
+    void differentPointers();
+    void virtualBaseDifferentPointers();
+#ifndef QTEST_NO_RTTI
+    void dynamicCast();
+    void dynamicCastDifferentPointers();
+    void dynamicCastVirtualBase();
+    void dynamicCastFailure();
+#endif
+    void constCorrectness();
+    void customDeleter();
+    void creating();
+    void creatingQObject();
+    void mixTrackingPointerCode();
+    void threadStressTest_data();
+    void threadStressTest();
+    void validConstructs();
+    void invalidConstructs_data();
+    void invalidConstructs();
+
+public slots:
+    void cleanup() { check(); }
+
+public:
+    inline void check()
+    {
+#ifdef QT_BUILD_INTERNAL
+        QtSharedPointer::internalSafetyCheckCleanCheck();
+#endif
+    }
+};
+
+template <typename Base>
+class RefCountHack: public Base
+{
+public:
+    using Base::d;
+};
+template<typename Base> static inline
+QtSharedPointer::ExternalRefCountData *refCountData(const Base &b)
+{ return static_cast<const RefCountHack<Base> *>(&b)->d; }
+
+class Data
+{
+public:
+    static int destructorCounter;
+    static int generationCounter;
+    int generation;
+
+    Data() : generation(++generationCounter)
+    { }
+
+    virtual ~Data()
+    {
+        Q_ASSERT_X(generation > 0, "tst_QSharedPointer", "Double deletion!");
+        generation = 0;
+        ++destructorCounter;
+    }
+
+    void doDelete()
+    {
+        delete this;
+    }
+
+    bool alsoDelete()
+    {
+        doDelete();
+        return true;
+    }
+
+    virtual void virtualDelete()
+    {
+        delete this;
+    }
+
+    virtual int classLevel() { return 1; }
+};
+int Data::generationCounter = 0;
+int Data::destructorCounter = 0;
+
+void tst_QSharedPointer::basics_data()
+{
+    QTest::addColumn<bool>("isNull");
+    QTest::newRow("null") << true;
+    QTest::newRow("non-null") << false;
+}
+
+void tst_QSharedPointer::basics()
+{
+    {
+        QSharedPointer<Data> ptr;
+        QWeakPointer<Data> weakref;
+
+        QCOMPARE(sizeof(ptr), 2*sizeof(void*));
+        QCOMPARE(sizeof(weakref), 2*sizeof(void*));
+    }
+
+    QFETCH(bool, isNull);
+    Data *aData = 0;
+    if (!isNull)
+        aData = new Data;
+    Data *otherData = new Data;
+    QSharedPointer<Data> ptr(aData);
+
+    {
+        // basic self tests
+        QCOMPARE(ptr.isNull(), isNull);
+        QCOMPARE(bool(ptr), !isNull);
+        QCOMPARE(!ptr, isNull);
+
+        QCOMPARE(ptr.data(), aData);
+        QCOMPARE(ptr.operator->(), aData);
+        Data &dataReference = *ptr;
+        QCOMPARE(&dataReference, aData);
+
+        QVERIFY(ptr == aData);
+        QVERIFY(!(ptr != aData));
+        QVERIFY(aData == ptr);
+        QVERIFY(!(aData != ptr));
+
+        QVERIFY(ptr != otherData);
+        QVERIFY(otherData != ptr);
+        QVERIFY(! (ptr == otherData));
+        QVERIFY(! (otherData == ptr));
+    }
+    QVERIFY(!refCountData(ptr) || refCountData(ptr)->weakref == 1);
+    QVERIFY(!refCountData(ptr) || refCountData(ptr)->strongref == 1);
+
+    {
+        // create another object:
+        QSharedPointer<Data> otherCopy(otherData);
+        QVERIFY(ptr != otherCopy);
+        QVERIFY(otherCopy != ptr);
+        QVERIFY(! (ptr == otherCopy));
+        QVERIFY(! (otherCopy == ptr));
+
+        // otherData is deleted here
+    }
+    QVERIFY(!refCountData(ptr) || refCountData(ptr)->weakref == 1);
+    QVERIFY(!refCountData(ptr) || refCountData(ptr)->strongref == 1);
+
+    {
+        // create a copy:
+        QSharedPointer<Data> copy(ptr);
+        QVERIFY(copy == ptr);
+        QVERIFY(ptr == copy);
+        QVERIFY(! (copy != ptr));
+        QVERIFY(! (ptr != copy));
+        QCOMPARE(copy, ptr);
+        QCOMPARE(ptr, copy);
+
+        QCOMPARE(copy.isNull(), isNull);
+        QCOMPARE(copy.data(), aData);
+        QVERIFY(copy == aData);
+    }
+    QVERIFY(!refCountData(ptr) || refCountData(ptr)->weakref == 1);
+    QVERIFY(!refCountData(ptr) || refCountData(ptr)->strongref == 1);
+
+    {
+        // create a weak reference:
+        QWeakPointer<Data> weak(ptr);
+        QCOMPARE(weak.isNull(), isNull);
+        QCOMPARE(!weak, isNull);
+        QCOMPARE(bool(weak), !isNull);
+
+        QVERIFY(ptr == weak);
+        QVERIFY(weak == ptr);
+        QVERIFY(! (ptr != weak));
+        QVERIFY(! (weak != ptr));
+
+        // create another reference:
+        QWeakPointer<Data> weak2(weak);
+        QCOMPARE(weak2.isNull(), isNull);
+        QCOMPARE(!weak2, isNull);
+        QCOMPARE(bool(weak2), !isNull);
+
+        QVERIFY(weak2 == weak);
+        QVERIFY(weak == weak2);
+        QVERIFY(! (weak2 != weak));
+        QVERIFY(! (weak != weak2));
+
+        // create a strong reference back:
+        QSharedPointer<Data> strong(weak);
+        QVERIFY(strong == weak);
+        QVERIFY(strong == ptr);
+        QCOMPARE(strong.data(), aData);
+    }
+    QVERIFY(!refCountData(ptr) || refCountData(ptr)->weakref == 1);
+    QVERIFY(!refCountData(ptr) || refCountData(ptr)->strongref == 1);
+
+    // aData is deleted here
+}
+
+void tst_QSharedPointer::swap()
+{
+    QSharedPointer<int> p1, p2(new int(42)), control = p2;
+    QVERIFY(p1 != control);
+    QVERIFY(p1.isNull());
+    QVERIFY(p2 == control);
+    QVERIFY(!p2.isNull());
+    QVERIFY(*p2 == 42);
+
+    p1.swap(p2);
+    QVERIFY(p1 == control);
+    QVERIFY(!p1.isNull());
+    QVERIFY(p2 != control);
+    QVERIFY(p2.isNull());
+    QVERIFY(*p1 == 42);
+
+    p1.swap(p2);
+    QVERIFY(p1 != control);
+    QVERIFY(p1.isNull());
+    QVERIFY(p2 == control);
+    QVERIFY(!p2.isNull());
+    QVERIFY(*p2 == 42);
+
+    qSwap(p1, p2);
+    QVERIFY(p1 == control);
+    QVERIFY(!p1.isNull());
+    QVERIFY(p2 != control);
+    QVERIFY(p2.isNull());
+    QVERIFY(*p1 == 42);
+}
+
+class ForwardDeclared;
+ForwardDeclared *forwardPointer();
+void externalForwardDeclaration();
+extern int forwardDeclaredDestructorRunCount;
+
+void tst_QSharedPointer::forwardDeclaration1()
+{
+#if defined(Q_CC_SUN) || defined(Q_CC_WINSCW) || defined(Q_CC_RVCT)
+    QSKIP("This type of forward declaration is not valid with this compiler", SkipAll);
+#else
+    externalForwardDeclaration();
+
+    struct Wrapper { QSharedPointer<ForwardDeclared> pointer; };
+
+    forwardDeclaredDestructorRunCount = 0;
+    {
+        Wrapper w;
+        w.pointer = QSharedPointer<ForwardDeclared>(forwardPointer());
+        QVERIFY(!w.pointer.isNull());
+    }
+    QCOMPARE(forwardDeclaredDestructorRunCount, 1);
+#endif
+}
+
+#include "forwarddeclared.h"
+
+void tst_QSharedPointer::forwardDeclaration2()
+{
+    forwardDeclaredDestructorRunCount = 0;
+    {
+        struct Wrapper { QSharedPointer<ForwardDeclared> pointer; };
+        Wrapper w1, w2;
+        w1.pointer = QSharedPointer<ForwardDeclared>(forwardPointer());
+        QVERIFY(!w1.pointer.isNull());
+    }
+    QCOMPARE(forwardDeclaredDestructorRunCount, 1);
+}
+
+void tst_QSharedPointer::memoryManagement()
+{
+    int generation = Data::generationCounter + 1;
+    int destructorCounter = Data::destructorCounter;
+
+    QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data);
+    QCOMPARE(ptr->generation, generation);
+    QCOMPARE(Data::destructorCounter, destructorCounter);
+    QCOMPARE(Data::generationCounter, generation);
+
+    ptr = ptr;
+    QCOMPARE(ptr->generation, generation);
+    QCOMPARE(Data::destructorCounter, destructorCounter);
+    QCOMPARE(Data::generationCounter, generation);
+
+    {
+        QSharedPointer<Data> copy = ptr;
+        QCOMPARE(ptr->generation, generation);
+        QCOMPARE(copy->generation, generation);
+
+        // copy goes out of scope, ptr continues
+    }
+    QCOMPARE(ptr->generation, generation);
+    QCOMPARE(Data::destructorCounter, destructorCounter);
+    QCOMPARE(Data::generationCounter, generation);
+
+    {
+        QWeakPointer<Data> weak = ptr;
+        weak = ptr;
+        QCOMPARE(ptr->generation, generation);
+        QCOMPARE(Data::destructorCounter, destructorCounter);
+        QCOMPARE(Data::generationCounter, generation);
+
+        weak = weak;
+        QCOMPARE(ptr->generation, generation);
+        QCOMPARE(Data::destructorCounter, destructorCounter);
+        QCOMPARE(Data::generationCounter, generation);
+
+        QSharedPointer<Data> strong = weak;
+        QCOMPARE(ptr->generation, generation);
+        QCOMPARE(strong->generation, generation);
+        QCOMPARE(Data::destructorCounter, destructorCounter);
+        QCOMPARE(Data::generationCounter, generation);
+
+        // both weak and strong go out of scope
+    }
+    QCOMPARE(ptr->generation, generation);
+    QCOMPARE(Data::destructorCounter, destructorCounter);
+    QCOMPARE(Data::generationCounter, generation);
+
+    QWeakPointer<Data> weak = ptr;
+    ptr = QSharedPointer<Data>();
+
+    // destructor must have been called
+    QCOMPARE(Data::destructorCounter, destructorCounter + 1);
+    QVERIFY(ptr.isNull());
+    QVERIFY(weak.isNull());
+
+    // if we create a strong pointer from the weak, it must still be null
+    ptr = weak;
+    QVERIFY(ptr.isNull());
+    QVERIFY(ptr == 0);
+    QCOMPARE(ptr.data(), (Data*)0);
+}
+
+class DerivedData: public Data
+{
+public:
+    static int derivedDestructorCounter;
+    int moreData;
+    DerivedData() : moreData(0) { }
+    ~DerivedData() { ++derivedDestructorCounter; }
+
+    virtual void virtualDelete()
+    {
+        delete this;
+    }
+
+    virtual int classLevel() { return 2; }
+};
+int DerivedData::derivedDestructorCounter = 0;
+
+class Stuffing
+{
+public:
+    char buffer[16];
+    Stuffing() { for (uint i = 0; i < sizeof buffer; ++i) buffer[i] = 16 - i; }
+    virtual ~Stuffing() { }
+};
+
+class DiffPtrDerivedData: public Stuffing, public Data
+{
+public:
+    virtual int classLevel() { return 3; }
+};
+
+class VirtualDerived: virtual public Data
+{
+public:
+    int moreData;
+
+    VirtualDerived() : moreData(0xc0ffee) { }
+    virtual int classLevel() { return 4; }
+};
+
+void tst_QSharedPointer::downCast()
+{
+    {
+        QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData);
+        QSharedPointer<Data> baseptr = qSharedPointerCast<Data>(ptr);
+        QSharedPointer<Data> other;
+
+        QVERIFY(ptr == baseptr);
+        QVERIFY(baseptr == ptr);
+        QVERIFY(! (ptr != baseptr));
+        QVERIFY(! (baseptr != ptr));
+
+        QVERIFY(ptr != other);
+        QVERIFY(other != ptr);
+        QVERIFY(! (ptr == other));
+        QVERIFY(! (other == ptr));
+    }
+
+    {
+        QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData);
+        QSharedPointer<Data> baseptr = ptr;
+    }
+
+    int destructorCount;
+    destructorCount = DerivedData::derivedDestructorCounter;
+    {
+        QSharedPointer<Data> baseptr;
+        {
+            QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData);
+            baseptr = ptr;
+            QVERIFY(baseptr == ptr);
+        }
+    }
+    QCOMPARE(DerivedData::derivedDestructorCounter, destructorCount + 1);
+
+    destructorCount = DerivedData::derivedDestructorCounter;
+    {
+        QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData);
+        QWeakPointer<Data> baseptr = ptr;
+        QVERIFY(baseptr == ptr);
+
+        ptr = QSharedPointer<DerivedData>();
+        QVERIFY(baseptr.isNull());
+    }
+    QCOMPARE(DerivedData::derivedDestructorCounter, destructorCount + 1);
+
+    destructorCount = DerivedData::derivedDestructorCounter;
+    {
+        QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData);
+        QWeakPointer<DerivedData> weakptr(ptr);
+
+        QSharedPointer<Data> baseptr = weakptr;
+        QVERIFY(baseptr == ptr);
+        QWeakPointer<Data> baseweakptr = weakptr;
+        QVERIFY(baseweakptr == ptr);
+    }
+    QCOMPARE(DerivedData::derivedDestructorCounter, destructorCount + 1);
+}
+
+void tst_QSharedPointer::upCast()
+{
+    QSharedPointer<Data> baseptr = QSharedPointer<Data>(new DerivedData);
+
+    {
+        QSharedPointer<DerivedData> derivedptr = qSharedPointerCast<DerivedData>(baseptr);
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QWeakPointer<DerivedData> derivedptr = qWeakPointerCast<DerivedData>(baseptr);
+        QVERIFY(baseptr == derivedptr);
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QWeakPointer<Data> weakptr = baseptr;
+        QSharedPointer<DerivedData> derivedptr = qSharedPointerCast<DerivedData>(weakptr);
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QSharedPointer<DerivedData> derivedptr = baseptr.staticCast<DerivedData>();
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+}
+
+class OtherObject: public QObject
+{
+    Q_OBJECT
+};
+
+void tst_QSharedPointer::qobjectWeakManagement()
+{
+    {
+        QWeakPointer<QObject> weak;
+        weak = QWeakPointer<QObject>();
+        QVERIFY(weak.isNull());
+        QVERIFY(!weak.data());
+    }
+
+    {
+        QObject *obj = new QObject;
+        QWeakPointer<QObject> weak(obj);
+        QVERIFY(!weak.isNull());
+        QVERIFY(weak.data() == obj);
+
+        // now delete
+        delete obj;
+        QVERIFY(weak.isNull());
+    }
+    check();
+
+    {
+        // same, bit with operator=
+        QObject *obj = new QObject;
+        QWeakPointer<QObject> weak;
+        weak = obj;
+        QVERIFY(!weak.isNull());
+        QVERIFY(weak.data() == obj);
+
+        // now delete
+        delete obj;
+        QVERIFY(weak.isNull());
+    }
+    check();
+
+    {
+        // delete triggered by parent
+        QObject *obj, *parent;
+        parent = new QObject;
+        obj = new QObject(parent);
+        QWeakPointer<QObject> weak(obj);
+
+        // now delete the parent
+        delete parent;
+        QVERIFY(weak.isNull());
+    }
+    check();
+
+    {
+        // same as above, but set the parent after QWeakPointer is created
+        QObject *obj, *parent;
+        obj = new QObject;
+        QWeakPointer<QObject> weak(obj);
+
+        parent = new QObject;
+        obj->setParent(parent);
+
+        // now delete the parent
+        delete parent;
+        QVERIFY(weak.isNull());
+    }
+    check();
+
+    {
+        // with two QWeakPointers
+        QObject *obj = new QObject;
+        QWeakPointer<QObject> weak(obj);
+
+        {
+            QWeakPointer<QObject> weak2(obj);
+            QVERIFY(!weak2.isNull());
+            QVERIFY(weak == weak2);
+        }
+        QVERIFY(!weak.isNull());
+
+        delete obj;
+        QVERIFY(weak.isNull());
+    }
+    check();
+
+    {
+        // same, but delete the pointer while two QWeakPointers exist
+        QObject *obj = new QObject;
+        QWeakPointer<QObject> weak(obj);
+
+        {
+            QWeakPointer<QObject> weak2(obj);
+            QVERIFY(!weak2.isNull());
+
+            delete obj;
+            QVERIFY(weak.isNull());
+            QVERIFY(weak2.isNull());
+        }
+        QVERIFY(weak.isNull());
+    }
+    check();
+}
+
+void tst_QSharedPointer::noSharedPointerFromWeakQObject()
+{
+    // you're not allowed to create a QSharedPointer from an unmanaged QObject
+    QObject obj;
+    QWeakPointer<QObject> weak(&obj);
+
+    QSharedPointer<QObject> strong = weak.toStrongRef();
+    QVERIFY(strong.isNull());
+
+    // is something went wrong, we'll probably crash here
+}
+
+void tst_QSharedPointer::weakQObjectFromSharedPointer()
+{
+    // this is the inverse of the above: you're allowed to create a QWeakPointer
+    // from a managed QObject
+    QSharedPointer<QObject> shared(new QObject);
+    QWeakPointer<QObject> weak = shared.data();
+    QVERIFY(!weak.isNull());
+
+    // delete:
+    shared.clear();
+    QVERIFY(weak.isNull());
+}
+
+void tst_QSharedPointer::objectCast()
+{
+    {
+        OtherObject *data = new OtherObject;
+        QSharedPointer<QObject> baseptr = QSharedPointer<QObject>(data);
+        QVERIFY(baseptr == data);
+        QVERIFY(data == baseptr);
+
+        // perform object cast
+        QSharedPointer<OtherObject> ptr = qSharedPointerObjectCast<OtherObject>(baseptr);
+        QVERIFY(!ptr.isNull());
+        QCOMPARE(ptr.data(), data);
+        QVERIFY(ptr == data);
+
+        // again:
+        ptr = baseptr.objectCast<OtherObject>();
+        QVERIFY(ptr == data);
+
+#ifndef QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
+        // again:
+        ptr = qobject_cast<OtherObject *>(baseptr);
+        QVERIFY(ptr == data);
+
+        // again:
+        ptr = qobject_cast<QSharedPointer<OtherObject> >(baseptr);
+        QVERIFY(ptr == data);
+#endif
+    }
+    check();
+
+    {
+        const OtherObject *data = new OtherObject;
+        QSharedPointer<const QObject> baseptr = QSharedPointer<const QObject>(data);
+        QVERIFY(baseptr == data);
+        QVERIFY(data == baseptr);
+
+        // perform object cast
+        QSharedPointer<const OtherObject> ptr = qSharedPointerObjectCast<const OtherObject>(baseptr);
+        QVERIFY(!ptr.isNull());
+        QCOMPARE(ptr.data(), data);
+        QVERIFY(ptr == data);
+
+        // again:
+        ptr = baseptr.objectCast<const OtherObject>();
+        QVERIFY(ptr == data);
+
+#ifndef QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
+        // again:
+        ptr = qobject_cast<const OtherObject *>(baseptr);
+        QVERIFY(ptr == data);
+
+        // again:
+        ptr = qobject_cast<QSharedPointer<const OtherObject> >(baseptr);
+        QVERIFY(ptr == data);
+#endif
+    }
+    check();
+
+    {
+        OtherObject *data = new OtherObject;
+        QPointer<OtherObject> qptr = data;
+        QSharedPointer<OtherObject> ptr = QSharedPointer<OtherObject>(data);
+        QWeakPointer<QObject> weakptr = ptr;
+
+        {
+            // perform object cast
+            QSharedPointer<OtherObject> otherptr = qSharedPointerObjectCast<OtherObject>(weakptr);
+            QVERIFY(otherptr == ptr);
+
+            // again:
+            otherptr = qobject_cast<OtherObject *>(weakptr);
+            QVERIFY(otherptr == ptr);
+
+            // again:
+            otherptr = qobject_cast<QSharedPointer<OtherObject> >(weakptr);
+            QVERIFY(otherptr == ptr);
+        }
+
+        // drop the reference:
+        ptr.clear();
+        QVERIFY(ptr.isNull());
+        QVERIFY(qptr.isNull());
+        QVERIFY(weakptr.toStrongRef().isNull());
+
+        // verify that the object casts fail without crash
+        QSharedPointer<OtherObject> otherptr = qSharedPointerObjectCast<OtherObject>(weakptr);
+        QVERIFY(otherptr.isNull());
+
+#ifndef QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
+        // again:
+        otherptr = qobject_cast<OtherObject *>(weakptr);
+        QVERIFY(otherptr.isNull());
+
+        // again:
+        otherptr = qobject_cast<QSharedPointer<OtherObject> >(weakptr);
+        QVERIFY(otherptr.isNull());
+#endif
+    }
+    check();
+}
+
+void tst_QSharedPointer::differentPointers()
+{
+    {
+        DiffPtrDerivedData *aData = new DiffPtrDerivedData;
+        Data *aBase = aData;
+
+        // ensure that this compiler isn't broken
+        if (*reinterpret_cast<quintptr *>(&aData) == *reinterpret_cast<quintptr *>(&aBase))
+            qFatal("Something went very wrong -- we couldn't create two different pointers to the same object");
+        if (aData != aBase)
+            QSKIP("Broken compiler", SkipAll);
+        if (aBase != aData)
+            QSKIP("Broken compiler", SkipAll);
+
+        QSharedPointer<DiffPtrDerivedData> ptr = QSharedPointer<DiffPtrDerivedData>(aData);
+        QSharedPointer<Data> baseptr = qSharedPointerCast<Data>(ptr);
+        qDebug("naked: orig: %p; base: %p (%s) -- QSharedPointer: orig: %p; base %p (%s) -- result: %s",
+               aData, aBase, aData == aBase ? "equal" : "not equal",
+               ptr.data(), baseptr.data(), ptr.data() == baseptr.data() ? "equal" : "not equal",
+               baseptr.data() == aData ? "equal" : "not equal");
+
+        QVERIFY(ptr.data() == baseptr.data());
+        QVERIFY(baseptr.data() == ptr.data());
+        QVERIFY(ptr == baseptr);
+        QVERIFY(baseptr == ptr);
+
+        QVERIFY(ptr.data() == aBase);
+        QVERIFY(aBase == ptr.data());
+        QVERIFY(ptr.data() == aData);
+        QVERIFY(aData == ptr.data());
+
+        QVERIFY(ptr == aBase);
+        QVERIFY(aBase == ptr);
+        QVERIFY(ptr == aData);
+        QVERIFY(aData == ptr);
+
+        QVERIFY(baseptr.data() == aBase);
+        QVERIFY(aBase == baseptr.data());
+        QVERIFY(baseptr == aBase);
+        QVERIFY(aBase == baseptr);
+
+        QVERIFY(baseptr.data() == aData);
+        QVERIFY(aData == baseptr.data());
+
+#if defined(Q_CC_MSVC) && _MSC_VER < 1400
+        QEXPECT_FAIL("", "Compiler bug", Continue);
+#endif
+        QVERIFY(baseptr == aData);
+#if defined(Q_CC_MSVC) && _MSC_VER < 1400
+        QEXPECT_FAIL("", "Compiler bug", Continue);
+#endif
+        QVERIFY(aData == baseptr);
+    }
+    check();
+
+    {
+        DiffPtrDerivedData *aData = new DiffPtrDerivedData;
+        Data *aBase = aData;
+        Q_ASSERT(aData == aBase);
+        Q_ASSERT(*reinterpret_cast<quintptr *>(&aData) != *reinterpret_cast<quintptr *>(&aBase));
+
+        QSharedPointer<Data> baseptr = QSharedPointer<Data>(aData);
+        QSharedPointer<DiffPtrDerivedData> ptr = qSharedPointerCast<DiffPtrDerivedData>(baseptr);
+        QVERIFY(ptr == baseptr);
+        QVERIFY(ptr.data() == baseptr.data());
+        QVERIFY(ptr == aBase);
+#if defined(Q_CC_MSVC) && _MSC_VER < 1400
+        QEXPECT_FAIL("", "Compiler bug", Continue);
+#endif
+        QVERIFY(baseptr == aData);
+    }
+    check();
+
+    {
+        DiffPtrDerivedData *aData = new DiffPtrDerivedData;
+        Data *aBase = aData;
+        Q_ASSERT(aData == aBase);
+        Q_ASSERT(*reinterpret_cast<quintptr *>(&aData) != *reinterpret_cast<quintptr *>(&aBase));
+
+        QSharedPointer<DiffPtrDerivedData> ptr = QSharedPointer<DiffPtrDerivedData>(aData);
+        QSharedPointer<Data> baseptr = ptr;
+        QVERIFY(ptr == baseptr);
+        QVERIFY(ptr.data() == baseptr.data());
+        QVERIFY(ptr == aBase);
+        QVERIFY(ptr == aData);
+#if defined(Q_CC_MSVC) && _MSC_VER < 1400
+        QEXPECT_FAIL("", "Compiler bug", Continue);
+#endif
+        QVERIFY(baseptr == aData);
+        QVERIFY(baseptr == aBase);
+    }
+    check();
+}
+
+void tst_QSharedPointer::virtualBaseDifferentPointers()
+{
+    {
+        VirtualDerived *aData = new VirtualDerived;
+        Data *aBase = aData;
+        Q_ASSERT(aData == aBase);
+        Q_ASSERT(*reinterpret_cast<quintptr *>(&aData) != *reinterpret_cast<quintptr *>(&aBase));
+
+        QSharedPointer<VirtualDerived> ptr = QSharedPointer<VirtualDerived>(aData);
+        QSharedPointer<Data> baseptr = qSharedPointerCast<Data>(ptr);
+        QVERIFY(ptr == baseptr);
+        QVERIFY(ptr.data() == baseptr.data());
+        QVERIFY(ptr == aBase);
+        QVERIFY(ptr == aData);
+#if defined(Q_CC_MSVC) && _MSC_VER < 1400
+        QEXPECT_FAIL("", "Compiler bug", Continue);
+#endif
+        QVERIFY(baseptr == aData);
+        QVERIFY(baseptr == aBase);
+    }
+    check();
+
+    {
+        VirtualDerived *aData = new VirtualDerived;
+        Data *aBase = aData;
+        Q_ASSERT(aData == aBase);
+        Q_ASSERT(*reinterpret_cast<quintptr *>(&aData) != *reinterpret_cast<quintptr *>(&aBase));
+
+        QSharedPointer<VirtualDerived> ptr = QSharedPointer<VirtualDerived>(aData);
+        QSharedPointer<Data> baseptr = ptr;
+        QVERIFY(ptr == baseptr);
+        QVERIFY(ptr.data() == baseptr.data());
+        QVERIFY(ptr == aBase);
+        QVERIFY(ptr == aData);
+#if defined(Q_CC_MSVC) && _MSC_VER < 1400
+        QEXPECT_FAIL("", "Compiler bug", Continue);
+#endif
+        QVERIFY(baseptr == aData);
+        QVERIFY(baseptr == aBase);
+    }
+    check();
+}
+
+#ifndef QTEST_NO_RTTI
+void tst_QSharedPointer::dynamicCast()
+{
+    DerivedData *aData = new DerivedData;
+    QSharedPointer<Data> baseptr = QSharedPointer<Data>(aData);
+
+    {
+        QSharedPointer<DerivedData> derivedptr = qSharedPointerDynamicCast<DerivedData>(baseptr);
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QWeakPointer<Data> weakptr = baseptr;
+        QSharedPointer<DerivedData> derivedptr = qSharedPointerDynamicCast<DerivedData>(weakptr);
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QSharedPointer<DerivedData> derivedptr = baseptr.dynamicCast<DerivedData>();
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+}
+
+void tst_QSharedPointer::dynamicCastDifferentPointers()
+{
+    // DiffPtrDerivedData derives from both Data and Stuffing
+    DiffPtrDerivedData *aData = new DiffPtrDerivedData;
+    QSharedPointer<Data> baseptr = QSharedPointer<Data>(aData);
+
+    {
+        QSharedPointer<DiffPtrDerivedData> derivedptr = qSharedPointerDynamicCast<DiffPtrDerivedData>(baseptr);
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QWeakPointer<Data> weakptr = baseptr;
+        QSharedPointer<DiffPtrDerivedData> derivedptr = qSharedPointerDynamicCast<DiffPtrDerivedData>(weakptr);
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QSharedPointer<DiffPtrDerivedData> derivedptr = baseptr.dynamicCast<DiffPtrDerivedData>();
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        Stuffing *nakedptr = dynamic_cast<Stuffing *>(baseptr.data());
+        QVERIFY(nakedptr);
+
+        QSharedPointer<Stuffing> otherbaseptr = qSharedPointerDynamicCast<Stuffing>(baseptr);
+        QVERIFY(!otherbaseptr.isNull());
+        QVERIFY(otherbaseptr == nakedptr);
+        QCOMPARE(otherbaseptr.data(), nakedptr);
+        QCOMPARE(static_cast<DiffPtrDerivedData*>(otherbaseptr.data()), aData);
+    }
+}
+
+void tst_QSharedPointer::dynamicCastVirtualBase()
+{
+    VirtualDerived *aData = new VirtualDerived;
+    QSharedPointer<Data> baseptr = QSharedPointer<Data>(aData);
+
+    {
+        QSharedPointer<VirtualDerived> derivedptr = qSharedPointerDynamicCast<VirtualDerived>(baseptr);
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QWeakPointer<Data> weakptr = baseptr;
+        QSharedPointer<VirtualDerived> derivedptr = qSharedPointerDynamicCast<VirtualDerived>(weakptr);
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QSharedPointer<VirtualDerived> derivedptr = baseptr.dynamicCast<VirtualDerived>();
+        QVERIFY(baseptr == derivedptr);
+        QCOMPARE(derivedptr.data(), aData);
+        QCOMPARE(static_cast<Data *>(derivedptr.data()), baseptr.data());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+}
+
+void tst_QSharedPointer::dynamicCastFailure()
+{
+    QSharedPointer<Data> baseptr = QSharedPointer<Data>(new Data);
+    QVERIFY(dynamic_cast<DerivedData *>(baseptr.data()) == 0);
+
+    {
+        QSharedPointer<DerivedData> derivedptr = qSharedPointerDynamicCast<DerivedData>(baseptr);
+        QVERIFY(derivedptr.isNull());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+
+    {
+        QSharedPointer<DerivedData> derivedptr = baseptr.dynamicCast<DerivedData>();
+        QVERIFY(derivedptr.isNull());
+    }
+    QCOMPARE(int(refCountData(baseptr)->weakref), 1);
+    QCOMPARE(int(refCountData(baseptr)->strongref), 1);
+}
+#endif
+
+void tst_QSharedPointer::constCorrectness()
+{
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data);
+        QSharedPointer<const Data> cptr(ptr);
+        QSharedPointer<volatile Data> vptr(ptr);
+        cptr = ptr;
+        vptr = ptr;
+
+        ptr = qSharedPointerConstCast<Data>(cptr);
+        ptr = qSharedPointerConstCast<Data>(vptr);
+        ptr = cptr.constCast<Data>();
+        ptr = vptr.constCast<Data>();
+
+#if !defined(Q_CC_HPACC) && !defined(QT_ARCH_PARISC)
+        // the aCC series 3 compiler we have on the PA-RISC
+        // machine crashes compiling this code
+
+        QSharedPointer<const volatile Data> cvptr(ptr);
+        QSharedPointer<const volatile Data> cvptr2(cptr);
+        QSharedPointer<const volatile Data> cvptr3(vptr);
+        cvptr = ptr;
+        cvptr2 = cptr;
+        cvptr3 = vptr;
+        ptr = qSharedPointerConstCast<Data>(cvptr);
+        ptr = cvptr.constCast<Data>();
+#endif
+    }
+    check();
+
+    {
+        Data *aData = new Data;
+        QSharedPointer<Data> ptr = QSharedPointer<Data>(aData);
+        const QSharedPointer<Data> cptr = ptr;
+
+        ptr = cptr;
+        QSharedPointer<Data> other = qSharedPointerCast<Data>(cptr);
+
+#ifndef QT_NO_DYNAMIC_CAST
+        other = qSharedPointerDynamicCast<Data>(cptr);
+#endif
+
+        QCOMPARE(cptr.data(), aData);
+        QCOMPARE(cptr.operator->(), aData);
+    }
+    check();
+}
+
+static int customDeleterFnCallCount;
+void customDeleterFn(Data *ptr)
+{
+    ++customDeleterFnCallCount;
+    delete ptr;
+}
+
+static int refcount;
+
+template <typename T>
+struct CustomDeleter
+{
+    CustomDeleter() { ++refcount; }
+    CustomDeleter(const CustomDeleter &) { ++refcount; }
+    ~CustomDeleter() { --refcount; }
+    inline void operator()(T *ptr)
+    {
+        delete ptr;
+        ++callCount;
+    }
+    static int callCount;
+};
+template<typename T> int CustomDeleter<T>::callCount = 0;
+
+void tst_QSharedPointer::customDeleter()
+{
+    {
+        QSharedPointer<Data> ptr(new Data, &Data::doDelete);
+        QSharedPointer<Data> ptr2(new Data, &Data::alsoDelete);
+        QSharedPointer<Data> ptr3(new Data, &Data::virtualDelete);
+    }
+    check();
+    {
+        QSharedPointer<DerivedData> ptr(new DerivedData, &Data::doDelete);
+        QSharedPointer<DerivedData> ptr2(new DerivedData, &Data::alsoDelete);
+        QSharedPointer<DerivedData> ptr3(new DerivedData, &Data::virtualDelete);
+    }
+    check();
+
+    customDeleterFnCallCount = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data, customDeleterFn);
+        ptr.data();
+        QCOMPARE(customDeleterFnCallCount, 0);
+    }
+    QCOMPARE(customDeleterFnCallCount, 1);
+    check();
+
+    customDeleterFnCallCount = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data, customDeleterFn);
+        QCOMPARE(customDeleterFnCallCount, 0);
+        ptr.clear();
+        QCOMPARE(customDeleterFnCallCount, 1);
+    }
+    QCOMPARE(customDeleterFnCallCount, 1);
+    check();
+
+    customDeleterFnCallCount = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data, customDeleterFn);
+        QCOMPARE(customDeleterFnCallCount, 0);
+        ptr = QSharedPointer<Data>(new Data);
+        QCOMPARE(customDeleterFnCallCount, 1);
+    }
+    QCOMPARE(customDeleterFnCallCount, 1);
+    check();
+
+    customDeleterFnCallCount = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>(new DerivedData, customDeleterFn);
+        ptr.data();
+        QCOMPARE(customDeleterFnCallCount, 0);
+    }
+    QCOMPARE(customDeleterFnCallCount, 1);
+    check();
+
+    customDeleterFnCallCount = 0;
+    {
+        QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData, customDeleterFn);
+        ptr.data();
+        QCOMPARE(customDeleterFnCallCount, 0);
+    }
+    QCOMPARE(customDeleterFnCallCount, 1);
+    check();
+
+    customDeleterFnCallCount = 0;
+    {
+        QSharedPointer<Data> other;
+        {
+            QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data, customDeleterFn);
+            other = ptr;
+            QCOMPARE(customDeleterFnCallCount, 0);
+        }
+        QCOMPARE(customDeleterFnCallCount, 0);
+    }
+    QCOMPARE(customDeleterFnCallCount, 1);
+    check();
+
+    customDeleterFnCallCount = 0;
+    {
+        QSharedPointer<Data> other;
+        {
+            QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData, customDeleterFn);
+            other = ptr;
+            QCOMPARE(customDeleterFnCallCount, 0);
+        }
+        QCOMPARE(customDeleterFnCallCount, 0);
+    }
+    QCOMPARE(customDeleterFnCallCount, 1);
+    check();
+
+    refcount = 0;
+    CustomDeleter<Data> dataDeleter;
+    dataDeleter.callCount = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data, dataDeleter);
+        ptr.data();
+        QCOMPARE(dataDeleter.callCount, 0);
+    }
+    QCOMPARE(dataDeleter.callCount, 1);
+    QCOMPARE(refcount, 1);
+    check();
+
+    dataDeleter.callCount = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data, dataDeleter);
+        QSharedPointer<Data> other = ptr;
+        other.clear();
+        QCOMPARE(dataDeleter.callCount, 0);
+    }
+    QCOMPARE(dataDeleter.callCount, 1);
+    QCOMPARE(refcount, 1);
+    check();
+
+    dataDeleter.callCount = 0;
+    {
+        QSharedPointer<Data> other;
+        {
+            QSharedPointer<Data> ptr = QSharedPointer<Data>(new Data, dataDeleter);
+            other = ptr;
+            QCOMPARE(dataDeleter.callCount, 0);
+        }
+        QCOMPARE(dataDeleter.callCount, 0);
+    }
+    QCOMPARE(dataDeleter.callCount, 1);
+    QCOMPARE(refcount, 1);
+    check();
+
+    dataDeleter.callCount = 0;
+    {
+        QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData, dataDeleter);
+        ptr.data();
+        QCOMPARE(dataDeleter.callCount, 0);
+    }
+    QCOMPARE(dataDeleter.callCount, 1);
+    QCOMPARE(refcount, 1);
+    check();
+
+    CustomDeleter<DerivedData> derivedDataDeleter;
+    derivedDataDeleter.callCount = 0;
+    dataDeleter.callCount = 0;
+    {
+        QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData, derivedDataDeleter);
+        ptr.data();
+        QCOMPARE(dataDeleter.callCount, 0);
+        QCOMPARE(derivedDataDeleter.callCount, 0);
+    }
+    QCOMPARE(dataDeleter.callCount, 0);
+    QCOMPARE(derivedDataDeleter.callCount, 1);
+    QCOMPARE(refcount, 2);
+    check();
+
+    derivedDataDeleter.callCount = 0;
+    dataDeleter.callCount = 0;
+    {
+        QSharedPointer<Data> other;
+        {
+            QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData, dataDeleter);
+            other = ptr;
+            QCOMPARE(dataDeleter.callCount, 0);
+            QCOMPARE(derivedDataDeleter.callCount, 0);
+        }
+        QCOMPARE(dataDeleter.callCount, 0);
+        QCOMPARE(derivedDataDeleter.callCount, 0);
+    }
+    QCOMPARE(dataDeleter.callCount, 1);
+    QCOMPARE(derivedDataDeleter.callCount, 0);
+    QCOMPARE(refcount, 2);
+    check();
+
+    derivedDataDeleter.callCount = 0;
+    dataDeleter.callCount = 0;
+    {
+        QSharedPointer<Data> other;
+        {
+            QSharedPointer<DerivedData> ptr = QSharedPointer<DerivedData>(new DerivedData, derivedDataDeleter);
+            other = ptr;
+            QCOMPARE(dataDeleter.callCount, 0);
+            QCOMPARE(derivedDataDeleter.callCount, 0);
+        }
+        QCOMPARE(dataDeleter.callCount, 0);
+        QCOMPARE(derivedDataDeleter.callCount, 0);
+    }
+    QCOMPARE(dataDeleter.callCount, 0);
+    QCOMPARE(derivedDataDeleter.callCount, 1);
+    QCOMPARE(refcount, 2);
+    check();
+}
+
+void customQObjectDeleterFn(QObject *obj)
+{
+    ++customDeleterFnCallCount;
+    delete obj;
+}
+
+void tst_QSharedPointer::creating()
+{
+    Data::generationCounter = Data::destructorCounter = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>::create();
+        QVERIFY(ptr.data());
+        QCOMPARE(Data::generationCounter, 1);
+        QCOMPARE(ptr->generation, 1);
+        QCOMPARE(Data::destructorCounter, 0);
+
+        QCOMPARE(ptr->classLevel(), 1);
+
+        ptr.clear();
+        QCOMPARE(Data::destructorCounter, 1);
+    }
+    check();
+
+    Data::generationCounter = Data::destructorCounter = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<Data>::create();
+        QWeakPointer<Data> weakptr = ptr;
+        QtSharedPointer::ExternalRefCountData *d = refCountData(ptr);
+
+        ptr.clear();
+        QVERIFY(ptr.isNull());
+        QCOMPARE(Data::destructorCounter, 1);
+
+        // valgrind will complain here if something happened to the pointer
+        QVERIFY(d->weakref == 1);
+        QVERIFY(d->strongref == 0);
+    }
+    check();
+
+    Data::generationCounter = Data::destructorCounter = 0;
+    DerivedData::derivedDestructorCounter = 0;
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<DerivedData>::create();
+        QCOMPARE(ptr->classLevel(), 2);
+        QCOMPARE(ptr.staticCast<DerivedData>()->moreData, 0);
+        ptr.clear();
+
+        QCOMPARE(Data::destructorCounter, 1);
+        QCOMPARE(DerivedData::derivedDestructorCounter, 1);
+    }
+    check();
+
+    {
+        QSharedPointer<Data> ptr = QSharedPointer<DiffPtrDerivedData>::create();
+        QCOMPARE(ptr->classLevel(), 3);
+        QCOMPARE(ptr.staticCast<DiffPtrDerivedData>()->buffer[7]+0, 16-7);
+        QCOMPARE(ptr.staticCast<DiffPtrDerivedData>()->buffer[3]+0, 16-3);
+        QCOMPARE(ptr.staticCast<DiffPtrDerivedData>()->buffer[0]+0, 16);
+    }
+    check();
+
+    {
+        QSharedPointer<VirtualDerived> ptr = QSharedPointer<VirtualDerived>::create();
+        QCOMPARE(ptr->classLevel(), 4);
+        QCOMPARE(ptr->moreData, 0xc0ffee);
+
+        QSharedPointer<Data> baseptr = ptr;
+        QCOMPARE(baseptr->classLevel(), 4);
+    }
+    check();
+}
+
+void tst_QSharedPointer::creatingQObject()
+{
+    {
+        QSharedPointer<QObject> ptr = QSharedPointer<QObject>::create();
+        QCOMPARE(ptr->metaObject(), &QObject::staticMetaObject);
+
+        QPointer<QObject> qptr = ptr.data();
+        ptr.clear();
+
+        QVERIFY(qptr.isNull());
+    }
+    check();
+
+    {
+        QSharedPointer<QObject> ptr = QSharedPointer<OtherObject>::create();
+        QCOMPARE(ptr->metaObject(), &OtherObject::staticMetaObject);
+    }
+    check();
+}
+
+void tst_QSharedPointer::mixTrackingPointerCode()
+{
+    {
+        // pointer created with tracking
+        // deleted in code without tracking
+        QSharedPointer<int> ptr = QSharedPointer<int>(new int(42));
+        Wrapper w(ptr);
+        ptr.clear();
+    }
+    check();
+
+    {
+        // pointer created without tracking
+        // deleted in code with tracking
+        Wrapper w = Wrapper::create();
+        w.ptr.clear();
+    }
+}
+
+class ThreadData
+{
+    QAtomicInt * volatile ptr;
+public:
+    ThreadData(QAtomicInt *p) : ptr(p) { }
+    ~ThreadData() { ++ptr; }
+    void ref()
+    {
+        // if we're called after the destructor, we'll crash
+        ptr->ref();
+    }
+};
+
+class StrongThread: public QThread
+{
+protected:
+    void run()
+    {
+        usleep(rand() % 2000);
+        ptr->ref();
+        ptr.clear();
+    }
+public:
+    QSharedPointer<ThreadData> ptr;
+};
+
+class WeakThread: public QThread
+{
+protected:
+    void run()
+    {
+        usleep(rand() % 2000);
+        QSharedPointer<ThreadData> ptr = weak;
+        if (ptr)
+            ptr->ref();
+        ptr.clear();
+    }
+public:
+    QWeakPointer<ThreadData> weak;
+};
+
+void tst_QSharedPointer::threadStressTest_data()
+{
+    QTest::addColumn<int>("strongThreadCount");
+    QTest::addColumn<int>("weakThreadCount");
+
+    QTest::newRow("0+0") << 0 << 0;
+    QTest::newRow("1+0") << 1 << 0;
+    QTest::newRow("2+0") << 2 << 0;
+    QTest::newRow("10+0") << 10 << 0;
+
+    QTest::newRow("0+1") << 0 << 1;
+    QTest::newRow("1+1") << 1 << 1;
+
+    QTest::newRow("2+10") << 2 << 10;
+#ifndef Q_OS_WINCE
+    // Windows CE cannot run this many threads
+    QTest::newRow("5+10") << 5 << 10;
+    QTest::newRow("5+30") << 5 << 30;
+
+    QTest::newRow("100+100") << 100 << 100;
+#endif
+}
+
+void tst_QSharedPointer::threadStressTest()
+{
+    QFETCH(int, strongThreadCount);
+    QFETCH(int, weakThreadCount);
+
+    int guard1[128];
+    QAtomicInt counter;
+    int guard2[128];
+
+    memset(guard1, 0, sizeof guard1);
+    memset(guard2, 0, sizeof guard2);
+
+    for (int r = 0; r < 5; ++r) {
+        QVector<QThread*> allThreads(6 * qMax(strongThreadCount, weakThreadCount) + 3, 0);
+        QSharedPointer<ThreadData> base = QSharedPointer<ThreadData>(new ThreadData(&counter));
+        counter = 0;
+
+        // set the pointers
+        for (int i = 0; i < strongThreadCount; ++i) {
+            StrongThread *t = new StrongThread;
+            t->ptr = base;
+            allThreads[2 * i] = t;
+        }
+        for (int i = 0; i < weakThreadCount; ++i) {
+            WeakThread *t = new WeakThread;
+            t->weak = base;
+            allThreads[6 * i + 3] = t;
+        }
+
+        base.clear();
+
+#ifdef Q_OS_WINCE
+        srand(QDateTime::currentDateTime().toTime_t());
+#else
+        srand(time(NULL));
+#endif
+        // start threads
+        for (int i = 0; i < allThreads.count(); ++i)
+            if (allThreads[i]) allThreads[i]->start();
+
+        // wait for them to finish
+        for (int i = 0; i < allThreads.count(); ++i)
+            if (allThreads[i]) allThreads[i]->wait();
+        qDeleteAll(allThreads);
+
+        // ensure the guards aren't touched
+        for (uint i = 0; i < sizeof guard1 / sizeof guard1[0]; ++i)
+            QVERIFY(!guard1[i]);
+        for (uint i = 0; i < sizeof guard2 / sizeof guard2[0]; ++i)
+            QVERIFY(!guard2[i]);
+
+        // verify that the count is the right range
+        int minValue = strongThreadCount;
+        int maxValue = strongThreadCount + weakThreadCount;
+        QVERIFY(counter >= minValue);
+        QVERIFY(counter <= maxValue);
+    }
+}
+
+void tst_QSharedPointer::validConstructs()
+{
+    {
+        Data *aData = new Data;
+        QSharedPointer<Data> ptr1 = QSharedPointer<Data>(aData);
+
+        ptr1 = ptr1;            // valid
+
+        QSharedPointer<Data> ptr2(ptr1);
+
+        ptr1 = ptr2;
+        ptr2 = ptr1;
+
+        ptr1 = QSharedPointer<Data>();
+        ptr1 = ptr2;
+    }
+}
+
+typedef bool (QTest::QExternalTest:: * TestFunction)(const QByteArray &body);
+Q_DECLARE_METATYPE(TestFunction)
+void tst_QSharedPointer::invalidConstructs_data()
+{
+    QTest::addColumn<TestFunction>("testFunction");
+    QTest::addColumn<QString>("code");
+    QTest::newRow("sanity-checking") << &QTest::QExternalTest::tryCompile << "";
+
+    // QSharedPointer<void> is not allowed
+    QTest::newRow("void") << &QTest::QExternalTest::tryCompileFail << "QSharedPointer<void> ptr;";
+
+    // implicit initialization
+    QTest::newRow("implicit-initialization1")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<Data> ptr = new Data;";
+    QTest::newRow("implicit-initialization2")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<Data> ptr;"
+           "ptr = new Data;";
+    QTest::newRow("implicit-initialization3")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QWeakPointer<Data> ptr = new Data;";
+    QTest::newRow("implicit-initialization4")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QWeakPointer<Data> ptr;"
+           "ptr = new Data;";
+
+    // use of forward-declared class
+    QTest::newRow("forward-declaration")
+        << &QTest::QExternalTest::tryRun
+        << "forwardDeclaredDestructorRunCount = 0;\n"
+           "{ QSharedPointer<ForwardDeclared> ptr = QSharedPointer<ForwardDeclared>(forwardPointer()); }\n"
+           "exit(forwardDeclaredDestructorRunCount);";
+    QTest::newRow("creating-forward-declaration")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<ForwardDeclared>::create();";
+
+    // upcast without cast operator:
+    QTest::newRow("upcast1")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<Data> baseptr = QSharedPointer<Data>(new DerivedData);\n"
+           "QSharedPointer<DerivedData> ptr(baseptr);";
+    QTest::newRow("upcast2")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<Data> baseptr = QSharedPointer<Data>(new DerivedData);\n"
+           "QSharedPointer<DerivedData> ptr;\n"
+           "ptr = baseptr;";
+
+    // dropping of const
+    QTest::newRow("const-dropping1")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<const Data> baseptr = QSharedPointer<const Data>(new Data);\n"
+           "QSharedPointer<Data> ptr(baseptr);";
+    QTest::newRow("const-dropping2")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<const Data> baseptr = QSharedPointer<const Data>(new Data);\n"
+           "QSharedPointer<Data> ptr;"
+           "ptr = baseptr;";
+    QTest::newRow("const-dropping-static-cast")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<const Data> baseptr = QSharedPointer<const Data>(new Data);\n"
+        "qSharedPointerCast<DerivedData>(baseptr);";
+#ifndef QTEST_NO_RTTI
+    QTest::newRow("const-dropping-dynamic-cast")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<const Data> baseptr = QSharedPointer<const Data>(new Data);\n"
+        "qSharedPointerDynamicCast<DerivedData>(baseptr);";
+#endif
+    QTest::newRow("const-dropping-object-cast1")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<const QObject> baseptr = QSharedPointer<const QObject>(new QObject);\n"
+        "qSharedPointerObjectCast<QCoreApplication>(baseptr);";
+#ifndef QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
+    QTest::newRow("const-dropping-object-cast2")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<const QObject> baseptr = QSharedPointer<const QObject>(new QObject);\n"
+        "qobject_cast<QCoreApplication *>(baseptr);";
+#endif
+
+    // arithmethics through automatic cast operators
+    QTest::newRow("arithmethic1")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<int> a;"
+           "QSharedPointer<Data> b;\n"
+           "if (a == b) return;";
+    QTest::newRow("arithmethic2")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<int> a;"
+           "QSharedPointer<Data> b;\n"
+           "if (a + b) return;";
+
+#if QT_VERSION >= 0x040600
+    // two objects with the same pointer
+    QTest::newRow("same-pointer")
+        << &QTest::QExternalTest::tryRunFail
+        << "Data *aData = new Data;\n"
+           "QSharedPointer<Data> ptr1 = QSharedPointer<Data>(aData);\n"
+           "QSharedPointer<Data> ptr2 = QSharedPointer<Data>(aData);\n";
+
+    // re-creation:
+    QTest::newRow("re-creation")
+        << &QTest::QExternalTest::tryRunFail
+        << "Data *aData = new Data;\n"
+           "QSharedPointer<Data> ptr1 = QSharedPointer<Data>(aData);"
+           "ptr1 = QSharedPointer<Data>(aData);";
+#endif
+
+    // any type of cast for unrelated types:
+    // (we have no reinterpret_cast)
+    QTest::newRow("invalid-cast1")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<Data> ptr1;\n"
+           "QSharedPointer<int> ptr2 = qSharedPointerCast<int>(ptr1);";
+#ifndef QTEST_NO_RTTI
+    QTest::newRow("invalid-cast2")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<Data> ptr1;\n"
+           "QSharedPointer<int> ptr2 = qSharedPointerDynamicCast<int>(ptr1);";
+#endif
+    QTest::newRow("invalid-cast3")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<Data> ptr1;\n"
+           "QSharedPointer<int> ptr2 = qSharedPointerConstCast<int>(ptr1);";
+    QTest::newRow("invalid-cast4")
+        << &QTest::QExternalTest::tryCompileFail
+        << "QSharedPointer<Data> ptr1;\n"
+           "QSharedPointer<int> ptr2 = qSharedPointerObjectCast<int>(ptr1);";
+
+    QTest::newRow("weak-pointer-from-regular-pointer")
+        << &QTest::QExternalTest::tryCompileFail
+        << "Data *ptr = 0;\n"
+           "QWeakPointer<Data> weakptr(ptr);\n";
+
+    QTest::newRow("shared-pointer-from-unmanaged-qobject")
+        << &QTest::QExternalTest::tryRunFail
+        << "QObject *ptr = new QObject;\n"
+           "QWeakPointer<QObject> weak = ptr;\n"    // this makes the object unmanaged
+           "QSharedPointer<QObject> shared(ptr);\n";
+
+    QTest::newRow("shared-pointer-implicit-from-uninitialized")
+        << &QTest::QExternalTest::tryCompileFail
+        << "Data *ptr = 0;\n"
+           "QSharedPointer<Data> weakptr = Qt::Uninitialized;\n";
+}
+
+void tst_QSharedPointer::invalidConstructs()
+{
+#ifdef Q_CC_MINGW
+    QSKIP("The maintainer of QSharedPointer: 'We don't know what the problem is so skip the tests.'", SkipAll);
+#endif
+#ifdef QTEST_CROSS_COMPILED
+    QSKIP("This test does not work on cross compiled systems", SkipAll);
+#endif
+
+    QTest::QExternalTest test;
+    test.setDebugMode(true);
+    test.setQtModules(QTest::QExternalTest::QtCore);
+    test.setExtraProgramSources(QStringList() << SRCDIR "forwarddeclared.cpp");
+    test.setProgramHeader(
+        "#define QT_SHAREDPOINTER_TRACK_POINTERS\n"
+        "#include <QtCore/qsharedpointer.h>\n"
+        "#include <QtCore/qcoreapplication.h>\n"
+        "\n"
+        "struct Data { int i; };\n"
+        "struct DerivedData: public Data { int j; };\n"
+        "\n"
+        "extern int forwardDeclaredDestructorRunCount;\n"
+        "class ForwardDeclared;\n"
+        "ForwardDeclared *forwardPointer();\n"
+        );
+
+    QFETCH(QString, code);
+    static bool sane = true;
+    if (code.isEmpty()) {
+        static const char snippet[] = "QSharedPointer<Data> baseptr; QSharedPointer<DerivedData> ptr;";
+        if (!test.tryCompile("")
+            || !test.tryRun("")
+            || !test.tryRunFail("exit(1);")
+            || !test.tryCompile(snippet)
+            || !test.tryLink(snippet)
+            || !test.tryRun(snippet)) {
+            sane = false;
+            qWarning("Sanity checking failed\nCode:\n%s\n",
+                     qPrintable(test.errorReport()));
+        }
+    }
+    if (!sane)
+        QFAIL("External testing failed sanity checking, cannot proceed");
+
+    QFETCH(TestFunction, testFunction);
+
+    QByteArray body = code.toLatin1();
+
+    bool result = (test.*testFunction)(body);
+    if (qgetenv("QTEST_EXTERNAL_DEBUG").toInt() > 0) {
+        qDebug("External test output:");
+#ifdef Q_CC_MSVC
+        // MSVC prints errors to stdout
+        printf("%s\n", test.standardOutput().constData());
+#endif
+        printf("%s\n", test.standardError().constData());
+    }
+    if (!result) {
+        qWarning("External code testing failed\nCode:\n%s\n", body.constData());
+        QFAIL("Fail");
+    }
+}
+
+QTEST_MAIN(tst_QSharedPointer)
+
+#include "tst_qsharedpointer.moc"