PySide6: Decouple pysideqmlregistertype.cpp from generated headers

Split out QtQml_VolatileBoolType and QtQmlListProperty into separate
files.

QtQml_VolatileBoolType still requires the generated header and
therefore needs to remain a static source of the QtQml module.

In pysideqmlregistertype.cpp and the newly added
pysideqmllistproperty.cpp, retrieve the required type objects by name
lookup from libshiboken instead of accessing the arrays of the
generated headers. With that, the generated headers are no no longer
required and they can be moved to libpyside or another extension
library at some point.

Change-Id: I9bbc880c58e38d8a623723d64e56b16574a1eb86
Reviewed-by: Christian Tismer <tismer@stackless.com>
(cherry picked from commit 1c16cad157eb6233c8d128567719d214c395b10e)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

10 files changed, 701 insertions, 442 deletions

diff --git a/sources/pyside6/PySide6/QtQml/CMakeLists.txt b/sources/pyside6/PySide6/QtQml/CMakeLists.txt
index 2fd253b25..fdc501c25 100644
--- a/sources/pyside6/PySide6/QtQml/CMakeLists.txt
+++ b/sources/pyside6/PySide6/QtQml/CMakeLists.txt
@@ -1,6 +1,8 @@
 project(QtQml)
 
-set(QtQml_registerType "${QtQml_SOURCE_DIR}/pysideqmlregistertype.cpp")
+set(QtQml_static_sources "${QtQml_SOURCE_DIR}/pysideqmlregistertype.cpp"
+                         "${QtQml_SOURCE_DIR}/pysideqmllistproperty.cpp"
+                         "${QtQml_SOURCE_DIR}/pysideqmlvolatilebool.cpp")
 
 set(QtQml_SRC
 ${QtQml_GEN_DIR}/qjsengine_wrapper.cpp
@@ -58,4 +60,4 @@ create_pyside_module(NAME QtQml
                      DEPS QtQml_deps
                      TYPESYSTEM_PATH QtQml_SOURCE_DIR
                      SOURCES QtQml_SRC
-                     STATIC_SOURCES QtQml_registerType)
+                     STATIC_SOURCES QtQml_static_sources)
diff --git a/sources/pyside6/PySide6/QtQml/pysideqmllistproperty.cpp b/sources/pyside6/PySide6/QtQml/pysideqmllistproperty.cpp
new file mode 100644
index 000000000..f817d26b5
--- /dev/null
+++ b/sources/pyside6/PySide6/QtQml/pysideqmllistproperty.cpp
@@ -0,0 +1,319 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt for Python.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "pysideqmllistproperty.h"
+#include "pysideqmlregistertype_p.h"
+
+#include <shiboken.h>
+#include <signature.h>
+
+#include <pysideproperty.h>
+
+#include <QtCore/QObject>
+#include <QtQml/QQmlListProperty>
+
+// Forward declarations.
+static void propListMetaCall(PySideProperty *pp, PyObject *self, QMetaObject::Call call,
+                             void **args);
+
+extern "C"
+{
+
+// This is the user data we store in the property.
+struct QmlListProperty
+{
+    PyTypeObject *type;
+    PyObject *append;
+    PyObject *count;
+    PyObject *at;
+    PyObject *clear;
+    PyObject *replace;
+    PyObject *removeLast;
+};
+
+static int propListTpInit(PyObject *self, PyObject *args, PyObject *kwds)
+{
+    static const char *kwlist[] = {"type", "append", "count", "at", "clear", "replace", "removeLast", 0};
+    PySideProperty *pySelf = reinterpret_cast<PySideProperty *>(self);
+    QmlListProperty *data = new QmlListProperty;
+    memset(data, 0, sizeof(QmlListProperty));
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwds,
+                                     "O|OOOOOO:QtQml.ListProperty", (char **) kwlist,
+                                     &data->type,
+                                     &data->append,
+                                     &data->count,
+                                     &data->at,
+                                     &data->clear,
+                                     &data->replace,
+                                     &data->removeLast)) {
+        delete data;
+        return -1;
+    }
+
+    PyTypeObject *qobjectType = qObjectType();
+
+    if (!PySequence_Contains(data->type->tp_mro, reinterpret_cast<PyObject *>(qobjectType))) {
+        PyErr_Format(PyExc_TypeError, "A type inherited from %s expected, got %s.",
+                     qobjectType->tp_name, data->type->tp_name);
+        delete data;
+        return -1;
+    }
+
+    if ((data->append && data->append != Py_None && !PyCallable_Check(data->append)) ||
+        (data->count && data->count != Py_None && !PyCallable_Check(data->count)) ||
+        (data->at && data->at != Py_None && !PyCallable_Check(data->at)) ||
+        (data->clear && data->clear != Py_None && !PyCallable_Check(data->clear)) ||
+        (data->replace && data->replace != Py_None && !PyCallable_Check(data->replace)) ||
+        (data->removeLast && data->removeLast != Py_None && !PyCallable_Check(data->removeLast))) {
+        PyErr_Format(PyExc_TypeError, "Non-callable parameter given");
+        delete data;
+        return -1;
+    }
+
+    PySide::Property::setMetaCallHandler(pySelf, &propListMetaCall);
+    PySide::Property::setTypeName(pySelf, "QQmlListProperty<QObject>");
+    PySide::Property::setUserData(pySelf, data);
+
+    return 0;
+}
+
+void propListTpFree(void *self)
+{
+    auto pySelf = reinterpret_cast<PySideProperty *>(self);
+    delete reinterpret_cast<QmlListProperty *>(PySide::Property::userData(pySelf));
+    // calls base type constructor
+    Py_TYPE(pySelf)->tp_base->tp_free(self);
+}
+
+static PyType_Slot PropertyListType_slots[] = {
+    {Py_tp_init, reinterpret_cast<void *>(propListTpInit)},
+    {Py_tp_free, reinterpret_cast<void *>(propListTpFree)},
+    {Py_tp_dealloc, reinterpret_cast<void *>(Sbk_object_dealloc)},
+    {0, nullptr}
+};
+static PyType_Spec PropertyListType_spec = {
+    "2:PySide6.QtQml.ListProperty",
+    sizeof(PySideProperty),
+    0,
+    Py_TPFLAGS_DEFAULT,
+    PropertyListType_slots,
+};
+
+
+PyTypeObject *PropertyListTypeF(void)
+{
+    static Shiboken::AutoDecRef bases(Py_BuildValue("(O)", PySidePropertyTypeF()));
+    static auto *type = SbkType_FromSpecWithBases(&PropertyListType_spec, bases);
+    return type;
+}
+
+} // extern "C"
+
+// Implementation of QQmlListProperty<T>::AppendFunction callback
+void propListAppender(QQmlListProperty<QObject> *propList, QObject *item)
+{
+    Shiboken::GilState state;
+
+    Shiboken::AutoDecRef args(PyTuple_New(2));
+    PyTypeObject *qobjectType = qObjectType();
+    PyTuple_SET_ITEM(args, 0,
+                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
+    PyTuple_SET_ITEM(args, 1,
+                     Shiboken::Conversions::pointerToPython(qobjectType, item));
+
+    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
+    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->append, args));
+
+    if (PyErr_Occurred())
+        PyErr_Print();
+}
+
+// Implementation of QQmlListProperty<T>::CountFunction callback
+qsizetype propListCount(QQmlListProperty<QObject> *propList)
+{
+    Shiboken::GilState state;
+
+    Shiboken::AutoDecRef args(PyTuple_New(1));
+    PyTuple_SET_ITEM(args, 0,
+                     Shiboken::Conversions::pointerToPython(qObjectType(), propList->object));
+
+    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
+    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->count, args));
+
+    // Check return type
+    if (PyErr_Occurred()) {
+        PyErr_Print();
+        return 0;
+    }
+
+    int cppResult = 0;
+    auto *converter = Shiboken::Conversions::PrimitiveTypeConverter<qsizetype>();
+    if (auto *pythonToCpp = Shiboken::Conversions::isPythonToCppConvertible(converter, retVal))
+        pythonToCpp(retVal, &cppResult);
+    return cppResult;
+}
+
+// Implementation of QQmlListProperty<T>::AtFunction callback
+QObject *propListAt(QQmlListProperty<QObject> *propList, qsizetype index)
+{
+    Shiboken::GilState state;
+
+    Shiboken::AutoDecRef args(PyTuple_New(2));
+    PyTypeObject *qobjectType = qObjectType();
+    PyTuple_SET_ITEM(args, 0,
+                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
+    auto *converter = Shiboken::Conversions::PrimitiveTypeConverter<qsizetype>();
+    PyTuple_SET_ITEM(args, 1,
+                     Shiboken::Conversions::copyToPython(converter, &index));
+
+    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
+    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->at, args));
+
+    QObject *result = 0;
+    if (PyErr_Occurred())
+        PyErr_Print();
+    else if (PyType_IsSubtype(Py_TYPE(retVal), data->type))
+        Shiboken::Conversions::pythonToCppPointer(qobjectType, retVal, &result);
+    return result;
+}
+
+// Implementation of QQmlListProperty<T>::ClearFunction callback
+void propListClear(QQmlListProperty<QObject> * propList)
+{
+    Shiboken::GilState state;
+
+    Shiboken::AutoDecRef args(PyTuple_New(1));
+    PyTypeObject *qobjectType = qObjectType();
+    PyTuple_SET_ITEM(args, 0,
+                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
+
+    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
+    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->clear, args));
+
+    if (PyErr_Occurred())
+        PyErr_Print();
+}
+
+// Implementation of QQmlListProperty<T>::ReplaceFunction callback
+void propListReplace(QQmlListProperty<QObject> *propList, qsizetype index, QObject *value)
+{
+    Shiboken::GilState state;
+
+    Shiboken::AutoDecRef args(PyTuple_New(3));
+    PyTypeObject *qobjectType = qObjectType();
+    PyTuple_SET_ITEM(args, 0,
+                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
+    auto *converter = Shiboken::Conversions::PrimitiveTypeConverter<qsizetype>();
+    PyTuple_SET_ITEM(args, 1,
+                     Shiboken::Conversions::copyToPython(converter, &index));
+    PyTuple_SET_ITEM(args, 2,
+                     Shiboken::Conversions::pointerToPython(qobjectType, value));
+
+    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
+    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->replace, args));
+
+    if (PyErr_Occurred())
+        PyErr_Print();
+}
+
+// Implementation of QQmlListProperty<T>::RemoveLastFunction callback
+void propListRemoveLast(QQmlListProperty<QObject> *propList)
+{
+    Shiboken::GilState state;
+
+    Shiboken::AutoDecRef args(PyTuple_New(1));
+    PyTypeObject *qobjectType = qObjectType();
+    PyTuple_SET_ITEM(args, 0,
+                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
+
+    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
+    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->removeLast, args));
+
+    if (PyErr_Occurred())
+        PyErr_Print();
+}
+
+// qt_metacall specialization for ListProperties
+static void propListMetaCall(PySideProperty *pp, PyObject *self,
+                             QMetaObject::Call call, void **args)
+{
+    if (call != QMetaObject::ReadProperty)
+        return;
+
+    auto data = reinterpret_cast<QmlListProperty *>(PySide::Property::userData(pp));
+    QObject *qobj;
+    PyTypeObject *qobjectType = qObjectType();
+    Shiboken::Conversions::pythonToCppPointer(qobjectType, self, &qobj);
+    QQmlListProperty<QObject> declProp(
+        qobj, data,
+        data->append && data->append != Py_None ? &propListAppender : nullptr,
+        data->count && data->count != Py_None ? &propListCount : nullptr,
+        data->at && data->at != Py_None ? &propListAt : nullptr,
+        data->clear && data->clear != Py_None ? &propListClear : nullptr,
+        data->replace && data->replace != Py_None ? &propListReplace : nullptr,
+        data->removeLast && data->removeLast != Py_None ? &propListRemoveLast : nullptr);
+
+    // Copy the data to the memory location requested by the meta call
+    void *v = args[0];
+    *reinterpret_cast<QQmlListProperty<QObject> *>(v) = declProp;
+}
+
+static const char *PropertyList_SignatureStrings[] = {
+    "PySide6.QtQml.ListProperty(self,type:type,append:typing.Callable,"
+        "at:typing.Callable=None,clear:typing.Callable=None,count:typing.Callable=None)",
+    nullptr // Sentinel
+};
+
+void initQtQmlListProperty(PyObject *module)
+{
+    // Export QmlListProperty type
+    if (InitSignatureStrings(PropertyListTypeF(), PropertyList_SignatureStrings) < 0) {
+        PyErr_Print();
+        qWarning() << "Error initializing PropertyList type.";
+        return;
+    }
+
+    // Register QQmlListProperty metatype for use in QML
+    qRegisterMetaType<QQmlListProperty<QObject>>();
+
+    Py_INCREF(reinterpret_cast<PyObject *>(PropertyListTypeF()));
+    PyModule_AddObject(module, PepType_GetNameStr(PropertyListTypeF()),
+                       reinterpret_cast<PyObject *>(PropertyListTypeF()));
+}
diff --git a/sources/pyside6/PySide6/QtQml/pysideqmllistproperty.h b/sources/pyside6/PySide6/QtQml/pysideqmllistproperty.h
new file mode 100644
index 000000000..bfae04bfc
--- /dev/null
+++ b/sources/pyside6/PySide6/QtQml/pysideqmllistproperty.h
@@ -0,0 +1,47 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt for Python.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PYSIDEQMLLISTPROPERTY_H
+#define PYSIDEQMLLISTPROPERTY_H
+
+#include <sbkpython.h>
+
+void initQtQmlListProperty(PyObject *module);
+
+#endif // PYSIDEQMLLISTPROPERTY_H
diff --git a/sources/pyside6/PySide6/QtQml/pysideqmlregistertype.cpp b/sources/pyside6/PySide6/QtQml/pysideqmlregistertype.cpp
index aa89579be..76ea97979 100644
--- a/sources/pyside6/PySide6/QtQml/pysideqmlregistertype.cpp
+++ b/sources/pyside6/PySide6/QtQml/pysideqmlregistertype.cpp
@@ -38,28 +38,21 @@
 ****************************************************************************/
 
 #include "pysideqmlregistertype.h"
+#include "pysideqmlregistertype_p.h"
 
 #include <limits>
 
 // shiboken
 #include <shiboken.h>
-#include <signature.h>
+#include <sbkstring.h>
 
 // pyside
 #include <pyside.h>
 #include <pyside_p.h>
-#include <pysideproperty.h>
-
-// auto generated headers
-#include "pyside6_qtcore_python.h"
-#include "pyside6_qtqml_python.h"
 
+#include <QtCore/QMutex>
 #include <QtQml/QJSValue>
 
-// Forward declarations.
-static void propListMetaCall(PySideProperty *pp, PyObject *self, QMetaObject::Call call,
-                             void **args);
-
 // Mutex used to avoid race condition on PySide::nextQObjectMemoryAddr.
 static QMutex nextQmlElementMutex;
 
@@ -74,14 +67,37 @@ static void createInto(void *memory, void *type)
     PySide::setNextQObjectMemoryAddr(0);
 }
 
+PyTypeObject *qObjectType()
+{
+    static PyTypeObject *const result =
+        Shiboken::Conversions::getPythonTypeObject("QObject*");
+    assert(result);
+    return result;
+}
+
+static PyTypeObject *qQmlEngineType()
+{
+    static PyTypeObject *const result =
+        Shiboken::Conversions::getPythonTypeObject("QQmlEngine*");
+    assert(result);
+    return result;
+}
+
+static PyTypeObject *qQJSValueType()
+{
+    static PyTypeObject *const result =
+        Shiboken::Conversions::getPythonTypeObject("QJSValue*");
+    assert(result);
+    return result;
+}
+
 int PySide::qmlRegisterType(PyObject *pyObj, const char *uri, int versionMajor,
                             int versionMinor, const char *qmlName, const char *noCreationReason,
                             bool creatable)
 {
     using namespace Shiboken;
 
-    static PyTypeObject *qobjectType = Shiboken::Conversions::getPythonTypeObject("QObject*");
-    assert(qobjectType);
+    PyTypeObject *qobjectType = qObjectType();
 
     PyTypeObject *pyObjType = reinterpret_cast<PyTypeObject *>(pyObj);
     if (!PySequence_Contains(pyObjType->tp_mro, reinterpret_cast<PyObject *>(qobjectType))) {
@@ -212,23 +228,20 @@ int PySide::qmlRegisterSingletonType(PyObject *pyObj, const char *uri, int versi
 
                 if (hasCallback) {
                     PyTuple_SET_ITEM(args, 0, Conversions::pointerToPython(
-                                     SbkPySide6_QtQmlTypes[SBK_QQMLENGINE_IDX],
-                                     engine));
+                                     qQmlEngineType(), engine));
                 }
 
                 AutoDecRef retVal(PyObject_CallObject(hasCallback ? callback : pyObj, args));
 
-                PyTypeObject *qobjectType = SbkPySide6_QtCoreTypes[SBK_QOBJECT_IDX];
-
                 // Make sure the callback returns something we can convert, else the entire application will crash.
                 if (retVal.isNull() ||
-                    Conversions::isPythonToCppPointerConvertible(qobjectType, retVal) == nullptr) {
+                    Conversions::isPythonToCppPointerConvertible(qObjectType(), retVal) == nullptr) {
                     PyErr_Format(PyExc_TypeError, "Callback returns invalid value.");
                     return nullptr;
                 }
 
                 QObject *obj = nullptr;
-                Conversions::pythonToCppPointer(qobjectType, retVal, &obj);
+                Conversions::pythonToCppPointer(qObjectType(), retVal, &obj);
 
                 if (obj != nullptr)
                     Py_INCREF(retVal);
@@ -242,12 +255,11 @@ int PySide::qmlRegisterSingletonType(PyObject *pyObj, const char *uri, int versi
                 AutoDecRef args(PyTuple_New(1));
 
                 PyTuple_SET_ITEM(args, 0, Conversions::pointerToPython(
-                                 SbkPySide6_QtQmlTypes[SBK_QQMLENGINE_IDX],
-                                 engine));
+                                 qQmlEngineType(), engine));
 
                 AutoDecRef retVal(PyObject_CallObject(callback, args));
 
-                PyTypeObject *qjsvalueType = SbkPySide6_QtQmlTypes[SBK_QJSVALUE_IDX];
+                PyTypeObject *qjsvalueType = qQJSValueType();
 
                 // Make sure the callback returns something we can convert, else the entire application will crash.
                 if (retVal.isNull() ||
@@ -274,9 +286,6 @@ int PySide::qmlRegisterSingletonInstance(PyObject *pyObj, const char *uri, int v
 {
     using namespace Shiboken;
 
-    static PyTypeObject *qobjectType = Conversions::getPythonTypeObject("QObject*");
-    assert(qobjectType);
-
     // Check if the Python Type inherit from QObject
     PyTypeObject *pyObjType = reinterpret_cast<PyTypeObject *>(pyObj);
 
@@ -291,7 +300,7 @@ int PySide::qmlRegisterSingletonInstance(PyObject *pyObj, const char *uri, int v
 
     // Convert the instanceObject (PyObject) into a QObject
     QObject *instanceQObject = reinterpret_cast<QObject*>(
-            Object::cppPointer(reinterpret_cast<SbkObject*>(instanceObject), qobjectType));
+            Object::cppPointer(reinterpret_cast<SbkObject*>(instanceObject), qObjectType()));
 
     // Create Singleton Functor to pass the QObject to the Type registration step
     // similarly to the case when we have a callback
@@ -317,400 +326,6 @@ int PySide::qmlRegisterSingletonInstance(PyObject *pyObj, const char *uri, int v
     return QQmlPrivate::qmlregister(QQmlPrivate::SingletonRegistration, &type);
 }
 
-extern "C"
-{
-
-// This is the user data we store in the property.
-struct QmlListProperty
-{
-    PyTypeObject *type;
-    PyObject *append;
-    PyObject *count;
-    PyObject *at;
-    PyObject *clear;
-    PyObject *replace;
-    PyObject *removeLast;
-};
-
-static int propListTpInit(PyObject *self, PyObject *args, PyObject *kwds)
-{
-    static const char *kwlist[] = {"type", "append", "count", "at", "clear", "replace", "removeLast", 0};
-    PySideProperty *pySelf = reinterpret_cast<PySideProperty *>(self);
-    QmlListProperty *data = new QmlListProperty;
-    memset(data, 0, sizeof(QmlListProperty));
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwds,
-                                     "O|OOOOOO:QtQml.ListProperty", (char **) kwlist,
-                                     &data->type,
-                                     &data->append,
-                                     &data->count,
-                                     &data->at,
-                                     &data->clear,
-                                     &data->replace,
-                                     &data->removeLast)) {
-        delete data;
-        return -1;
-    }
-
-    static PyTypeObject *qobjectType = Shiboken::Conversions::getPythonTypeObject("QObject*");
-    assert(qobjectType);
-
-    if (!PySequence_Contains(data->type->tp_mro, reinterpret_cast<PyObject *>(qobjectType))) {
-        PyErr_Format(PyExc_TypeError, "A type inherited from %s expected, got %s.",
-                     qobjectType->tp_name, data->type->tp_name);
-        delete data;
-        return -1;
-    }
-
-    if ((data->append && data->append != Py_None && !PyCallable_Check(data->append)) ||
-        (data->count && data->count != Py_None && !PyCallable_Check(data->count)) ||
-        (data->at && data->at != Py_None && !PyCallable_Check(data->at)) ||
-        (data->clear && data->clear != Py_None && !PyCallable_Check(data->clear)) ||
-        (data->replace && data->replace != Py_None && !PyCallable_Check(data->replace)) ||
-        (data->removeLast && data->removeLast != Py_None && !PyCallable_Check(data->removeLast))) {
-        PyErr_Format(PyExc_TypeError, "Non-callable parameter given");
-        delete data;
-        return -1;
-    }
-
-    PySide::Property::setMetaCallHandler(pySelf, &propListMetaCall);
-    PySide::Property::setTypeName(pySelf, "QQmlListProperty<QObject>");
-    PySide::Property::setUserData(pySelf, data);
-
-    return 0;
-}
-
-void propListTpFree(void *self)
-{
-    auto pySelf = reinterpret_cast<PySideProperty *>(self);
-    delete reinterpret_cast<QmlListProperty *>(PySide::Property::userData(pySelf));
-    // calls base type constructor
-    Py_TYPE(pySelf)->tp_base->tp_free(self);
-}
-
-static PyType_Slot PropertyListType_slots[] = {
-    {Py_tp_init, reinterpret_cast<void *>(propListTpInit)},
-    {Py_tp_free, reinterpret_cast<void *>(propListTpFree)},
-    {Py_tp_dealloc, reinterpret_cast<void *>(Sbk_object_dealloc)},
-    {0, nullptr}
-};
-static PyType_Spec PropertyListType_spec = {
-    "2:PySide6.QtQml.ListProperty",
-    sizeof(PySideProperty),
-    0,
-    Py_TPFLAGS_DEFAULT,
-    PropertyListType_slots,
-};
-
-
-PyTypeObject *PropertyListTypeF(void)
-{
-    static Shiboken::AutoDecRef bases(Py_BuildValue("(O)", PySidePropertyTypeF()));
-    static auto *type = SbkType_FromSpecWithBases(&PropertyListType_spec, bases);
-    return type;
-}
-
-} // extern "C"
-
-// Implementation of QQmlListProperty<T>::AppendFunction callback
-void propListAppender(QQmlListProperty<QObject> *propList, QObject *item)
-{
-    Shiboken::GilState state;
-
-    Shiboken::AutoDecRef args(PyTuple_New(2));
-    PyTypeObject *qobjectType = SbkPySide6_QtCoreTypes[SBK_QOBJECT_IDX];
-    PyTuple_SET_ITEM(args, 0,
-                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
-    PyTuple_SET_ITEM(args, 1,
-                     Shiboken::Conversions::pointerToPython(qobjectType, item));
-
-    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
-    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->append, args));
-
-    if (PyErr_Occurred())
-        PyErr_Print();
-}
-
-// Implementation of QQmlListProperty<T>::CountFunction callback
-qsizetype propListCount(QQmlListProperty<QObject> *propList)
-{
-    Shiboken::GilState state;
-
-    Shiboken::AutoDecRef args(PyTuple_New(1));
-    PyTypeObject *qobjectType = SbkPySide6_QtCoreTypes[SBK_QOBJECT_IDX];
-    PyTuple_SET_ITEM(args, 0,
-                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
-
-    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
-    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->count, args));
-
-    // Check return type
-    int cppResult = 0;
-    PythonToCppFunc pythonToCpp = 0;
-    if (PyErr_Occurred())
-        PyErr_Print();
-    else if ((pythonToCpp = Shiboken::Conversions::isPythonToCppConvertible(Shiboken::Conversions::PrimitiveTypeConverter<qsizetype>(), retVal)))
-        pythonToCpp(retVal, &cppResult);
-    return cppResult;
-}
-
-// Implementation of QQmlListProperty<T>::AtFunction callback
-QObject *propListAt(QQmlListProperty<QObject> *propList, qsizetype index)
-{
-    Shiboken::GilState state;
-
-    Shiboken::AutoDecRef args(PyTuple_New(2));
-    PyTypeObject *qobjectType = SbkPySide6_QtCoreTypes[SBK_QOBJECT_IDX];
-    PyTuple_SET_ITEM(args, 0,
-                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
-    PyTuple_SET_ITEM(args, 1, Shiboken::Conversions::copyToPython(Shiboken::Conversions::PrimitiveTypeConverter<qsizetype>(), &index));
-
-    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
-    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->at, args));
-
-    QObject *result = 0;
-    if (PyErr_Occurred())
-        PyErr_Print();
-    else if (PyType_IsSubtype(Py_TYPE(retVal), data->type))
-        Shiboken::Conversions::pythonToCppPointer(qobjectType, retVal, &result);
-    return result;
-}
-
-// Implementation of QQmlListProperty<T>::ClearFunction callback
-void propListClear(QQmlListProperty<QObject> * propList)
-{
-    Shiboken::GilState state;
-
-    Shiboken::AutoDecRef args(PyTuple_New(1));
-    PyTypeObject *qobjectType = SbkPySide6_QtCoreTypes[SBK_QOBJECT_IDX];
-    PyTuple_SET_ITEM(args, 0,
-                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
-
-    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
-    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->clear, args));
-
-    if (PyErr_Occurred())
-        PyErr_Print();
-}
-
-// Implementation of QQmlListProperty<T>::ReplaceFunction callback
-void propListReplace(QQmlListProperty<QObject> *propList, qsizetype index, QObject *value)
-{
-    Shiboken::GilState state;
-
-    Shiboken::AutoDecRef args(PyTuple_New(3));
-    PyTypeObject *qobjectType = SbkPySide6_QtCoreTypes[SBK_QOBJECT_IDX];
-    PyTuple_SET_ITEM(args, 0,
-                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
-    PyTuple_SET_ITEM(args, 1, Shiboken::Conversions::copyToPython(Shiboken::Conversions::PrimitiveTypeConverter<qsizetype>(), &index));
-    PyTuple_SET_ITEM(args, 2,
-                     Shiboken::Conversions::pointerToPython(qobjectType, value));
-
-    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
-    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->replace, args));
-
-    if (PyErr_Occurred())
-        PyErr_Print();
-}
-
-// Implementation of QQmlListProperty<T>::RemoveLastFunction callback
-void propListRemoveLast(QQmlListProperty<QObject> *propList)
-{
-    Shiboken::GilState state;
-
-    Shiboken::AutoDecRef args(PyTuple_New(1));
-    PyTypeObject *qobjectType = SbkPySide6_QtCoreTypes[SBK_QOBJECT_IDX];
-    PyTuple_SET_ITEM(args, 0,
-                     Shiboken::Conversions::pointerToPython(qobjectType, propList->object));
-
-    auto data = reinterpret_cast<QmlListProperty *>(propList->data);
-    Shiboken::AutoDecRef retVal(PyObject_CallObject(data->removeLast, args));
-
-    if (PyErr_Occurred())
-        PyErr_Print();
-}
-
-// qt_metacall specialization for ListProperties
-static void propListMetaCall(PySideProperty *pp, PyObject *self, QMetaObject::Call call, void **args)
-{
-    if (call != QMetaObject::ReadProperty)
-        return;
-
-    auto data = reinterpret_cast<QmlListProperty *>(PySide::Property::userData(pp));
-    QObject *qobj;
-    PyTypeObject *qobjectType = SbkPySide6_QtCoreTypes[SBK_QOBJECT_IDX];
-    Shiboken::Conversions::pythonToCppPointer(qobjectType, self, &qobj);
-    QQmlListProperty<QObject> declProp(qobj, data,
-                                       data->append && data->append != Py_None ? &propListAppender : nullptr,
-                                       data->count && data->count != Py_None ? &propListCount : nullptr,
-                                       data->at && data->at != Py_None ? &propListAt : nullptr,
-                                       data->clear && data->clear != Py_None ? &propListClear : nullptr,
-                                       data->replace && data->replace != Py_None ? &propListReplace : nullptr,
-                                       data->removeLast && data->removeLast != Py_None ? &propListRemoveLast : nullptr);
-
-    // Copy the data to the memory location requested by the meta call
-    void *v = args[0];
-    *reinterpret_cast<QQmlListProperty<QObject> *>(v) = declProp;
-}
-
-// VolatileBool (volatile bool) type definition.
-
-static PyObject *
-QtQml_VolatileBoolObject_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
-{
-    static const char *kwlist[] = {"x", 0};
-    PyObject *x = Py_False;
-    long ok;
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:bool", const_cast<char **>(kwlist), &x))
-        return Q_NULLPTR;
-    ok = PyObject_IsTrue(x);
-    if (ok < 0)
-        return Q_NULLPTR;
-
-    QtQml_VolatileBoolObject *self
-            = reinterpret_cast<QtQml_VolatileBoolObject *>(type->tp_alloc(type, 0));
-
-    if (self != nullptr)
-        self->flag = new AtomicBool(ok);
-
-    return reinterpret_cast<PyObject *>(self);
-}
-
-static void QtQml_VolatileBoolObject_dealloc(PyObject *self)
-{
-    auto volatileBool = reinterpret_cast<QtQml_VolatileBoolObject *>(self);
-    delete volatileBool->flag;
-    Sbk_object_dealloc(self);
-}
-
-static PyObject *
-QtQml_VolatileBoolObject_get(QtQml_VolatileBoolObject *self)
-{
-    return *self->flag ? Py_True : Py_False;
-}
-
-static PyObject *
-QtQml_VolatileBoolObject_set(QtQml_VolatileBoolObject *self, PyObject *args)
-{
-    PyObject *value = Py_False;
-    long ok;
-
-    if (!PyArg_ParseTuple(args, "O:bool", &value)) {
-        return Q_NULLPTR;
-    }
-
-    ok = PyObject_IsTrue(value);
-    if (ok < 0) {
-        PyErr_SetString(PyExc_TypeError, "Not a boolean value.");
-        return Q_NULLPTR;
-    }
-
-    *self->flag = ok > 0;
-
-    Py_RETURN_NONE;
-}
-
-static PyMethodDef QtQml_VolatileBoolObject_methods[] = {
-    {"get", reinterpret_cast<PyCFunction>(QtQml_VolatileBoolObject_get), METH_NOARGS,
-     "B.get() -> Bool. Returns the value of the volatile boolean"
-    },
-    {"set", reinterpret_cast<PyCFunction>(QtQml_VolatileBoolObject_set), METH_VARARGS,
-     "B.set(a) -> None. Sets the value of the volatile boolean"
-    },
-    {nullptr, nullptr, 0, nullptr}  /* Sentinel */
-};
-
-static PyObject *
-QtQml_VolatileBoolObject_repr(QtQml_VolatileBoolObject *self)
-{
-    PyObject *s;
-
-    if (*self->flag)
-        s = PyBytes_FromFormat("%s(True)",
-                                Py_TYPE(self)->tp_name);
-    else
-        s = PyBytes_FromFormat("%s(False)",
-                                Py_TYPE(self)->tp_name);
-    Py_XINCREF(s);
-    return s;
-}
-
-static PyObject *
-QtQml_VolatileBoolObject_str(QtQml_VolatileBoolObject *self)
-{
-    PyObject *s;
-
-    if (*self->flag)
-        s = PyBytes_FromFormat("%s(True) -> %p",
-                                Py_TYPE(self)->tp_name, self->flag);
-    else
-        s = PyBytes_FromFormat("%s(False) -> %p",
-                                Py_TYPE(self)->tp_name, self->flag);
-    Py_XINCREF(s);
-    return s;
-}
-
-static PyType_Slot QtQml_VolatileBoolType_slots[] = {
-    {Py_tp_repr, reinterpret_cast<void *>(QtQml_VolatileBoolObject_repr)},
-    {Py_tp_str, reinterpret_cast<void *>(QtQml_VolatileBoolObject_str)},
-    {Py_tp_methods, reinterpret_cast<void *>(QtQml_VolatileBoolObject_methods)},
-    {Py_tp_new, reinterpret_cast<void *>(QtQml_VolatileBoolObject_new)},
-    {Py_tp_dealloc, reinterpret_cast<void *>(QtQml_VolatileBoolObject_dealloc)},
-    {0, 0}
-};
-static PyType_Spec QtQml_VolatileBoolType_spec = {
-    "2:PySide6.QtQml.VolatileBool",
-    sizeof(QtQml_VolatileBoolObject),
-    0,
-    Py_TPFLAGS_DEFAULT,
-    QtQml_VolatileBoolType_slots,
-};
-
-
-PyTypeObject *QtQml_VolatileBoolTypeF(void)
-{
-    static auto *type = SbkType_FromSpec(&QtQml_VolatileBoolType_spec);
-    return type;
-}
-
-static const char *PropertyList_SignatureStrings[] = {
-    "PySide6.QtQml.ListProperty(self,type:type,append:typing.Callable,"
-        "at:typing.Callable=None,clear:typing.Callable=None,count:typing.Callable=None)",
-    nullptr}; // Sentinel
-
-static const char *VolatileBool_SignatureStrings[] = {
-    "PySide6.QtQml.VolatileBool.get(self)->bool",
-    "PySide6.QtQml.VolatileBool.set(self,a:object)",
-    nullptr}; // Sentinel
-
-void PySide::initQmlSupport(PyObject *module)
-{
-    // Export QmlListProperty type
-    if (InitSignatureStrings(PropertyListTypeF(), PropertyList_SignatureStrings) < 0) {
-        PyErr_Print();
-        qWarning() << "Error initializing PropertyList type.";
-        return;
-    }
-
-    // Register QQmlListProperty metatype for use in QML
-    qRegisterMetaType<QQmlListProperty<QObject>>();
-
-    Py_INCREF(reinterpret_cast<PyObject *>(PropertyListTypeF()));
-    PyModule_AddObject(module, PepType_GetNameStr(PropertyListTypeF()),
-                       reinterpret_cast<PyObject *>(PropertyListTypeF()));
-
-    if (InitSignatureStrings(QtQml_VolatileBoolTypeF(), VolatileBool_SignatureStrings) < 0) {
-        PyErr_Print();
-        qWarning() << "Error initializing VolatileBool type.";
-        return;
-    }
-
-    Py_INCREF(QtQml_VolatileBoolTypeF());
-    PyModule_AddObject(module, PepType_GetNameStr(QtQml_VolatileBoolTypeF()),
-                       reinterpret_cast<PyObject *>(QtQml_VolatileBoolTypeF()));
-}
-
 static std::string getGlobalString(const char *name)
 {
     using Shiboken::AutoDecRef;
@@ -756,11 +371,8 @@ PyObject *PySide::qmlElementMacro(PyObject *pyObj)
         return nullptr;
     }
 
-    static PyTypeObject *qobjectType = Shiboken::Conversions::getPythonTypeObject("QObject*");
-    assert(qobjectType);
-
     PyTypeObject *pyObjType = reinterpret_cast<PyTypeObject *>(pyObj);
-    if (!PySequence_Contains(pyObjType->tp_mro, reinterpret_cast<PyObject *>(qobjectType))) {
+    if (!PySequence_Contains(pyObjType->tp_mro, reinterpret_cast<PyObject *>(qObjectType()))) {
         PyErr_Format(PyExc_TypeError, "This decorator can only be used with classes inherited from QObject, got %s.", pyObjType->tp_name);
         return nullptr;
     }
diff --git a/sources/pyside6/PySide6/QtQml/pysideqmlregistertype.h b/sources/pyside6/PySide6/QtQml/pysideqmlregistertype.h
index 0dbfb6e5a..5c2c15c3d 100644
--- a/sources/pyside6/PySide6/QtQml/pysideqmlregistertype.h
+++ b/sources/pyside6/PySide6/QtQml/pysideqmlregistertype.h
@@ -48,14 +48,6 @@ namespace PySide
 extern void *nextQmlElementMemoryAddr;
 
 /**
- * Init the QML support doing things like registering QtQml.ListProperty and create the necessary stuff for
- * qmlRegisterType.
- *
- * \param module QtQml python module
- */
-void initQmlSupport(PyObject *module);
-
-/**
  * PySide implementation of qmlRegisterType<T> function.
  *
  * \param pyObj Python type to be registered.
@@ -103,10 +95,6 @@ int qmlRegisterSingletonInstance(PyObject *pyObj, const char *uri, int versionMa
  * \param pyObj Python type to be registered
  */
 PyObject *qmlElementMacro(PyObject *pyObj);
-}
-
-PyTypeObject *QtQml_VolatileBoolTypeF(void);
-
-#define VolatileBool_Check(op) (Py_TYPE(op) == QtQml_VolatileBoolTypeF())
+} // namespace PySide
 
-#endif
+#endif // PYSIDEQMLREGISTERTYPE_H
diff --git a/sources/pyside6/PySide6/QtQml/pysideqmlregistertype_p.h b/sources/pyside6/PySide6/QtQml/pysideqmlregistertype_p.h
new file mode 100644
index 000000000..d357a0392
--- /dev/null
+++ b/sources/pyside6/PySide6/QtQml/pysideqmlregistertype_p.h
@@ -0,0 +1,47 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt for Python.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PYSIDEQMLREGISTERTYPE_P_H
+#define PYSIDEQMLREGISTERTYPE_P_H
+
+#include <sbkpython.h>
+
+PyTypeObject *qObjectType();
+
+#endif // PYSIDEQMLREGISTERTYPE_P_H
diff --git a/sources/pyside6/PySide6/QtQml/pysideqmlvolatilebool.cpp b/sources/pyside6/PySide6/QtQml/pysideqmlvolatilebool.cpp
new file mode 100644
index 000000000..5aa9fde1a
--- /dev/null
+++ b/sources/pyside6/PySide6/QtQml/pysideqmlvolatilebool.cpp
@@ -0,0 +1,190 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt for Python.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "pysideqmlvolatilebool.h"
+
+#include <signature.h>
+
+#include <QtCore/QDebug>
+
+// Volatile Bool used for QQmlIncubationController::incubateWhile(std::atomic<bool> *, int)
+
+// Generated headers containing the definition of struct
+// QtQml_VolatileBoolObject. It is injected to avoid "pyside6_qtqml_python.h"
+// depending on other headers.
+#include "pyside6_qtcore_python.h"
+#include "pyside6_qtqml_python.h"
+
+// VolatileBool (volatile bool) type definition.
+
+static PyObject *
+QtQml_VolatileBoolObject_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+    static const char *kwlist[] = {"x", 0};
+    PyObject *x = Py_False;
+    long ok;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:bool", const_cast<char **>(kwlist), &x))
+        return nullptr;
+    ok = PyObject_IsTrue(x);
+    if (ok < 0)
+        return nullptr;
+
+    QtQml_VolatileBoolObject *self
+            = reinterpret_cast<QtQml_VolatileBoolObject *>(type->tp_alloc(type, 0));
+
+    if (self != nullptr)
+        self->flag = new AtomicBool(ok);
+
+    return reinterpret_cast<PyObject *>(self);
+}
+
+static void QtQml_VolatileBoolObject_dealloc(PyObject *self)
+{
+    auto volatileBool = reinterpret_cast<QtQml_VolatileBoolObject *>(self);
+    delete volatileBool->flag;
+    Sbk_object_dealloc(self);
+}
+
+static PyObject *
+QtQml_VolatileBoolObject_get(QtQml_VolatileBoolObject *self)
+{
+    return *self->flag ? Py_True : Py_False;
+}
+
+static PyObject *
+QtQml_VolatileBoolObject_set(QtQml_VolatileBoolObject *self, PyObject *args)
+{
+    PyObject *value = Py_False;
+    long ok;
+
+    if (!PyArg_ParseTuple(args, "O:bool", &value)) {
+        return nullptr;
+    }
+
+    ok = PyObject_IsTrue(value);
+    if (ok < 0) {
+        PyErr_SetString(PyExc_TypeError, "Not a boolean value.");
+        return nullptr;
+    }
+
+    *self->flag = ok > 0;
+
+    Py_RETURN_NONE;
+}
+
+static PyMethodDef QtQml_VolatileBoolObject_methods[] = {
+    {"get", reinterpret_cast<PyCFunction>(QtQml_VolatileBoolObject_get), METH_NOARGS,
+     "B.get() -> Bool. Returns the value of the volatile boolean"
+    },
+    {"set", reinterpret_cast<PyCFunction>(QtQml_VolatileBoolObject_set), METH_VARARGS,
+     "B.set(a) -> None. Sets the value of the volatile boolean"
+    },
+    {nullptr, nullptr, 0, nullptr}  /* Sentinel */
+};
+
+static PyObject *
+QtQml_VolatileBoolObject_repr(QtQml_VolatileBoolObject *self)
+{
+    PyObject *s;
+
+    if (*self->flag)
+        s = PyBytes_FromFormat("%s(True)",
+                                Py_TYPE(self)->tp_name);
+    else
+        s = PyBytes_FromFormat("%s(False)",
+                                Py_TYPE(self)->tp_name);
+    Py_XINCREF(s);
+    return s;
+}
+
+static PyObject *
+QtQml_VolatileBoolObject_str(QtQml_VolatileBoolObject *self)
+{
+    PyObject *s;
+
+    if (*self->flag)
+        s = PyBytes_FromFormat("%s(True) -> %p",
+                                Py_TYPE(self)->tp_name, self->flag);
+    else
+        s = PyBytes_FromFormat("%s(False) -> %p",
+                                Py_TYPE(self)->tp_name, self->flag);
+    Py_XINCREF(s);
+    return s;
+}
+
+static PyType_Slot QtQml_VolatileBoolType_slots[] = {
+    {Py_tp_repr, reinterpret_cast<void *>(QtQml_VolatileBoolObject_repr)},
+    {Py_tp_str, reinterpret_cast<void *>(QtQml_VolatileBoolObject_str)},
+    {Py_tp_methods, reinterpret_cast<void *>(QtQml_VolatileBoolObject_methods)},
+    {Py_tp_new, reinterpret_cast<void *>(QtQml_VolatileBoolObject_new)},
+    {Py_tp_dealloc, reinterpret_cast<void *>(QtQml_VolatileBoolObject_dealloc)},
+    {0, 0}
+};
+static PyType_Spec QtQml_VolatileBoolType_spec = {
+    "2:PySide6.QtQml.VolatileBool",
+    sizeof(QtQml_VolatileBoolObject),
+    0,
+    Py_TPFLAGS_DEFAULT,
+    QtQml_VolatileBoolType_slots,
+};
+
+PyTypeObject *QtQml_VolatileBoolTypeF(void)
+{
+    static auto *type = SbkType_FromSpec(&QtQml_VolatileBoolType_spec);
+    return type;
+}
+
+static const char *VolatileBool_SignatureStrings[] = {
+    "PySide6.QtQml.VolatileBool.get(self)->bool",
+    "PySide6.QtQml.VolatileBool.set(self,a:object)",
+    nullptr}; // Sentinel
+
+void initQtQmlVolatileBool(PyObject *module)
+{
+    if (InitSignatureStrings(QtQml_VolatileBoolTypeF(), VolatileBool_SignatureStrings) < 0) {
+        PyErr_Print();
+        qWarning() << "Error initializing VolatileBool type.";
+        return;
+    }
+
+    Py_INCREF(QtQml_VolatileBoolTypeF());
+    PyModule_AddObject(module, PepType_GetNameStr(QtQml_VolatileBoolTypeF()),
+                       reinterpret_cast<PyObject *>(QtQml_VolatileBoolTypeF()));
+}
diff --git a/sources/pyside6/PySide6/QtQml/pysideqmlvolatilebool.h b/sources/pyside6/PySide6/QtQml/pysideqmlvolatilebool.h
new file mode 100644
index 000000000..c67172563
--- /dev/null
+++ b/sources/pyside6/PySide6/QtQml/pysideqmlvolatilebool.h
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt for Python.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PYSIDEQMLVOLATILEBOOL_H
+#define PYSIDEQMLVOLATILEBOOL_H
+
+#include <sbkpython.h>
+
+PyTypeObject *QtQml_VolatileBoolTypeF(void);
+
+#define VolatileBool_Check(op) (Py_TYPE(op) == QtQml_VolatileBoolTypeF())
+
+void initQtQmlVolatileBool(PyObject *module);
+
+#endif // PYSIDEQMLVOLATILEBOOL_H
diff --git a/sources/pyside6/PySide6/QtQml/typesystem_qml.xml b/sources/pyside6/PySide6/QtQml/typesystem_qml.xml
index b59a6cf00..0302f66e8 100644
--- a/sources/pyside6/PySide6/QtQml/typesystem_qml.xml
+++ b/sources/pyside6/PySide6/QtQml/typesystem_qml.xml
@@ -57,6 +57,8 @@
 
     <inject-code class="native" position="beginning">
     #include "pysideqmlregistertype.h"
+    #include "pysideqmllistproperty.h"
+    #include "pysideqmlvolatilebool.h"
     </inject-code>
 
     <!-- This is to inform the generator that the VolatileBool python type exists -->
@@ -71,7 +73,7 @@
     <enum-type name="QQmlModuleImportSpecialVersions" since="6.0"/>
 
     <!-- expose QQmlIncubationController::incubateWhile() (see
-         QtQml_VolatileBoolTypeF/pysideqmlregistertype.h) -->
+         QtQml_VolatileBoolTypeF/pysideqmlvolatilebool.h) -->
     <namespace-type name="std" generate="no">
         <value-type name="atomic" generate="no"/>
     </namespace-type>
@@ -235,7 +237,7 @@
     </object-type>
     <object-type name="QQmlIncubationController">
         <extra-includes>
-            <include file-name="pysideqmlregistertype.h" location="local"/>
+            <include file-name="pysideqmlvolatilebool.h" location="local"/>
         </extra-includes>
         <modify-function signature="incubateWhile(std::atomic&lt;bool&gt;*,int)" allow-thread="yes">
             <modify-argument index="1">
diff --git a/sources/pyside6/PySide6/glue/qtqml.cpp b/sources/pyside6/PySide6/glue/qtqml.cpp
index a0a780a07..4a8d72ca4 100644
--- a/sources/pyside6/PySide6/glue/qtqml.cpp
+++ b/sources/pyside6/PySide6/glue/qtqml.cpp
@@ -73,7 +73,8 @@ int %0 = PySide::qmlRegisterType(%ARGUMENT_NAMES, false);
 // @snippet qmlregisteruncreatabletype
 
 // @snippet init
-PySide::initQmlSupport(module);
+initQtQmlListProperty(module);
+initQtQmlVolatileBool(module);
 // @snippet init
 
 // @snippet qjsengine-toscriptvalue