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improved wrapper check to avoid crashes on virtual methods while python object gets deleted...
improved wrapper check to avoid crashes on virtual methods while python object gets deleted git-svn-id: svn://svn.code.sf.net/p/pythonqt/code/trunk@245 ea8d5007-eb21-0410-b261-ccb3ea6e24a9
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PythonQtClassWrapper.cpp
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/*
*
* Copyright (C) 2010 MeVis Medical Solutions AG All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: MeVis Medical Solutions AG, Universitaetsallee 29,
* 28359 Bremen, Germany or:
*
* http://www.mevis.de
*
*/
//----------------------------------------------------------------------------------
/*!
// \file PythonQtClassWrapper.cpp
// \author Florian Link
// \author Last changed by $Author: florian $
// \date 2006-05
*/
//----------------------------------------------------------------------------------
#include "PythonQtClassWrapper.h"
#include <QObject>
#include "PythonQt.h"
#include "PythonQtSlot.h"
#include "PythonQtSignal.h"
#include "PythonQtClassInfo.h"
#include "PythonQtConversion.h"
#include "PythonQtInstanceWrapper.h"
static PyObject* PythonQtInstanceWrapper_invert(PythonQtInstanceWrapper* wrapper)
{
PyObject* result = NULL;
static QByteArray memberName = "__invert__";
PythonQtMemberInfo opSlot = wrapper->classInfo()->member(memberName);
if (opSlot._type == PythonQtMemberInfo::Slot) {
result = PythonQtSlotFunction_CallImpl(wrapper->classInfo(), wrapper->_obj, opSlot._slot, NULL, NULL, wrapper->_wrappedPtr);
}
return result;
}
static int PythonQtInstanceWrapper_nonzero(PythonQtInstanceWrapper* wrapper)
{
int result = (wrapper->_wrappedPtr == NULL && wrapper->_obj == NULL)?0:1;
if (result) {
static QByteArray memberName = "__nonzero__";
PythonQtMemberInfo opSlot = wrapper->classInfo()->member(memberName);
if (opSlot._type == PythonQtMemberInfo::Slot) {
PyObject* resultObj = PythonQtSlotFunction_CallImpl(wrapper->classInfo(), wrapper->_obj, opSlot._slot, NULL, NULL, wrapper->_wrappedPtr);
if (resultObj == Py_False) {
result = 0;
}
Py_XDECREF(resultObj);
}
}
return result;
}
static PyObject* PythonQtInstanceWrapper_binaryfunc(PyObject* self, PyObject* other, const QByteArray& opName, const QByteArray& fallbackOpName = QByteArray())
{
// since we disabled type checking, we can receive any object as self, but we currently only support
// different objects on the right. Otherwise we would need to generate __radd__ etc. methods.
if (!PyObject_TypeCheck(self, &PythonQtInstanceWrapper_Type)) {
QString error = "Unsupported operation " + opName + "(" + self->ob_type->tp_name + ", " + other->ob_type->tp_name + ")";
PyErr_SetString(PyExc_ArithmeticError, error.toLatin1().data());
return NULL;
}
PythonQtInstanceWrapper* wrapper = (PythonQtInstanceWrapper*)self;
PyObject* result = NULL;
PythonQtMemberInfo opSlot = wrapper->classInfo()->member(opName);
if (opSlot._type == PythonQtMemberInfo::Slot) {
// TODO get rid of tuple
PyObject* args = PyTuple_New(1);
Py_INCREF(other);
PyTuple_SET_ITEM(args, 0, other);
result = PythonQtSlotFunction_CallImpl(wrapper->classInfo(), wrapper->_obj, opSlot._slot, args, NULL, wrapper->_wrappedPtr);
Py_DECREF(args);
if (!result && !fallbackOpName.isEmpty()) {
// try fallback if we did not get a result
result = PythonQtInstanceWrapper_binaryfunc(self, other, fallbackOpName);
}
}
return result;
}
#define BINARY_OP(NAME) \
static PyObject* PythonQtInstanceWrapper_ ## NAME(PyObject* self, PyObject* other) \
{ \
static const QByteArray opName("__" #NAME "__"); \
return PythonQtInstanceWrapper_binaryfunc(self, other, opName); \
}
#define BINARY_OP_INPLACE(NAME) \
static PyObject* PythonQtInstanceWrapper_i ## NAME(PyObject* self, PyObject* other) \
{ \
static const QByteArray opName("__i" #NAME "__"); \
static const QByteArray fallbackName("__" #NAME "__"); \
return PythonQtInstanceWrapper_binaryfunc(self, other, opName, fallbackName); \
}
BINARY_OP(add)
BINARY_OP(sub)
BINARY_OP(mul)
BINARY_OP(div)
BINARY_OP(and)
BINARY_OP(or)
BINARY_OP(xor)
BINARY_OP(mod)
BINARY_OP(lshift)
BINARY_OP(rshift)
BINARY_OP_INPLACE(add)
BINARY_OP_INPLACE(sub)
BINARY_OP_INPLACE(mul)
BINARY_OP_INPLACE(div)
BINARY_OP_INPLACE(and)
BINARY_OP_INPLACE(or)
BINARY_OP_INPLACE(xor)
BINARY_OP_INPLACE(mod)
BINARY_OP_INPLACE(lshift)
BINARY_OP_INPLACE(rshift)
static void initializeSlots(PythonQtClassWrapper* wrap)
{
int typeSlots = wrap->classInfo()->typeSlots();
if (typeSlots) {
if (typeSlots & PythonQt::Type_Add) {
wrap->_base.as_number.nb_add = (binaryfunc)PythonQtInstanceWrapper_add;
}
if (typeSlots & PythonQt::Type_Subtract) {
wrap->_base.as_number.nb_subtract = (binaryfunc)PythonQtInstanceWrapper_sub;
}
if (typeSlots & PythonQt::Type_Multiply) {
wrap->_base.as_number.nb_multiply = (binaryfunc)PythonQtInstanceWrapper_mul;
}
if (typeSlots & PythonQt::Type_Divide) {
wrap->_base.as_number.nb_divide = (binaryfunc)PythonQtInstanceWrapper_div;
wrap->_base.as_number.nb_true_divide = (binaryfunc)PythonQtInstanceWrapper_div;
}
if (typeSlots & PythonQt::Type_And) {
wrap->_base.as_number.nb_and = (binaryfunc)PythonQtInstanceWrapper_and;
}
if (typeSlots & PythonQt::Type_Or) {
wrap->_base.as_number.nb_or = (binaryfunc)PythonQtInstanceWrapper_or;
}
if (typeSlots & PythonQt::Type_Xor) {
wrap->_base.as_number.nb_xor = (binaryfunc)PythonQtInstanceWrapper_xor;
}
if (typeSlots & PythonQt::Type_Mod) {
wrap->_base.as_number.nb_remainder = (binaryfunc)PythonQtInstanceWrapper_mod;
}
if (typeSlots & PythonQt::Type_LShift) {
wrap->_base.as_number.nb_lshift = (binaryfunc)PythonQtInstanceWrapper_lshift;
}
if (typeSlots & PythonQt::Type_RShift) {
wrap->_base.as_number.nb_rshift = (binaryfunc)PythonQtInstanceWrapper_rshift;
}
if (typeSlots & PythonQt::Type_InplaceAdd) {
wrap->_base.as_number.nb_add = (binaryfunc)PythonQtInstanceWrapper_iadd;
}
if (typeSlots & PythonQt::Type_InplaceSubtract) {
wrap->_base.as_number.nb_subtract = (binaryfunc)PythonQtInstanceWrapper_isub;
}
if (typeSlots & PythonQt::Type_InplaceMultiply) {
wrap->_base.as_number.nb_multiply = (binaryfunc)PythonQtInstanceWrapper_imul;
}
if (typeSlots & PythonQt::Type_InplaceDivide) {
wrap->_base.as_number.nb_inplace_divide = (binaryfunc)PythonQtInstanceWrapper_idiv;
wrap->_base.as_number.nb_inplace_true_divide = (binaryfunc)PythonQtInstanceWrapper_idiv;
}
if (typeSlots & PythonQt::Type_InplaceAnd) {
wrap->_base.as_number.nb_inplace_and = (binaryfunc)PythonQtInstanceWrapper_iand;
}
if (typeSlots & PythonQt::Type_InplaceOr) {
wrap->_base.as_number.nb_inplace_or = (binaryfunc)PythonQtInstanceWrapper_ior;
}
if (typeSlots & PythonQt::Type_InplaceXor) {
wrap->_base.as_number.nb_inplace_xor = (binaryfunc)PythonQtInstanceWrapper_ixor;
}
if (typeSlots & PythonQt::Type_InplaceMod) {
wrap->_base.as_number.nb_inplace_remainder = (binaryfunc)PythonQtInstanceWrapper_imod;
}
if (typeSlots & PythonQt::Type_InplaceLShift) {
wrap->_base.as_number.nb_inplace_lshift = (binaryfunc)PythonQtInstanceWrapper_ilshift;
}
if (typeSlots & PythonQt::Type_InplaceRShift) {
wrap->_base.as_number.nb_inplace_rshift = (binaryfunc)PythonQtInstanceWrapper_irshift;
}
if (typeSlots & PythonQt::Type_Invert) {
wrap->_base.as_number.nb_invert = (unaryfunc)PythonQtInstanceWrapper_invert;
}
if (typeSlots & PythonQt::Type_NonZero) {
wrap->_base.as_number.nb_nonzero = (inquiry)PythonQtInstanceWrapper_nonzero;
}
}
}
static PyObject* PythonQtClassWrapper_alloc(PyTypeObject *self, Py_ssize_t nitems)
{
// call the default type alloc
PyObject* obj = PyType_Type.tp_alloc(self, nitems);
// take current class type, if we are called via newPythonQtClassWrapper()
PythonQtClassWrapper* wrap = (PythonQtClassWrapper*)obj;
wrap->_classInfo = PythonQt::priv()->currentClassInfoForClassWrapperCreation();
if (wrap->_classInfo) {
initializeSlots(wrap);
}
return obj;
}
static int PythonQtClassWrapper_init(PythonQtClassWrapper* self, PyObject* args, PyObject* kwds)
{
// call the default type init
if (PyType_Type.tp_init((PyObject *)self, args, kwds) < 0) {
return -1;
}
// if we have no CPP class information, try our base class
if (!self->classInfo()) {
PyTypeObject* superType = ((PyTypeObject *)self)->tp_base;
if (!superType || (superType->ob_type != &PythonQtClassWrapper_Type)) {
PyErr_Format(PyExc_TypeError, "type %s is not derived from PythonQtClassWrapper", ((PyTypeObject*)self)->tp_name);
return -1;
}
// take the class info from the superType
self->_classInfo = ((PythonQtClassWrapper*)superType)->classInfo();
}
return 0;
}
static PyObject *PythonQtClassWrapper_classname(PythonQtClassWrapper* type)
{
return PyString_FromString((QString("Class_") + type->classInfo()->className()).toLatin1().data());
}
static PyObject *PythonQtClassWrapper_help(PythonQtClassWrapper* type)
{
return PythonQt::self()->helpCalled(type->classInfo());
}
PyObject *PythonQtClassWrapper_delete(PythonQtClassWrapper *type, PyObject *args)
{
Q_UNUSED(type);
Py_ssize_t argc = PyTuple_Size(args);
if (argc>0) {
PyObject* self = PyTuple_GET_ITEM(args, 0);
if (PyObject_TypeCheck(self, &PythonQtInstanceWrapper_Type)) {
return PythonQtInstanceWrapper_delete((PythonQtInstanceWrapper*)self);
}
}
return NULL;
}
PyObject *PythonQtClassWrapper_inherits(PythonQtClassWrapper *type, PyObject *args)
{
Q_UNUSED(type);
PythonQtInstanceWrapper* wrapper = NULL;
char *name = NULL;
if (!PyArg_ParseTuple(args, "O!s:PythonQtClassWrapper.inherits",&PythonQtInstanceWrapper_Type, &wrapper, &name)) {
return NULL;
}
return PythonQtConv::GetPyBool(wrapper->classInfo()->inherits(name));
}
static PyMethodDef PythonQtClassWrapper_methods[] = {
{"className", (PyCFunction)PythonQtClassWrapper_classname, METH_NOARGS,
"Return the classname of the object"
},
{"inherits", (PyCFunction)PythonQtClassWrapper_inherits, METH_VARARGS,
"Returns if the class inherits or is of given type name"
},
{"help", (PyCFunction)PythonQtClassWrapper_help, METH_NOARGS,
"Shows the help of available methods for this class"
},
{"delete", (PyCFunction)PythonQtClassWrapper_delete, METH_VARARGS,
"Deletes the given C++ object"
},
{NULL, NULL, 0 , NULL} /* Sentinel */
};
static PyObject *PythonQtClassWrapper_getattro(PyObject *obj, PyObject *name)
{
const char *attributeName;
PythonQtClassWrapper *wrapper = (PythonQtClassWrapper *)obj;
if ((attributeName = PyString_AsString(name)) == NULL) {
return NULL;
}
if (obj == (PyObject*)&PythonQtInstanceWrapper_Type) {
return NULL;
}
if (qstrcmp(attributeName, "__dict__")==0) {
PyObject* objectDict = ((PyTypeObject *)wrapper)->tp_dict;
if (!wrapper->classInfo()) {
Py_INCREF(objectDict);
return objectDict;
}
PyObject* dict = PyDict_New();
QStringList l = wrapper->classInfo()->memberList();
foreach (QString name, l) {
PyObject* o = PyObject_GetAttrString(obj, name.toLatin1().data());
if (o) {
PyDict_SetItemString(dict, name.toLatin1().data(), o);
Py_DECREF(o);
} else {
// it must have been a property or child, which we do not know as a class object...
PyErr_Clear();
}
}
if (wrapper->classInfo()->constructors()) {
PyObject* initName = PyString_FromString("__init__");
PyObject* func = PyType_Type.tp_getattro(obj, initName);
Py_DECREF(initName);
PyDict_SetItemString(dict, "__init__", func);
Py_DECREF(func);
}
for (int i = 0; PythonQtClassWrapper_methods[i].ml_name != NULL; i++) {
PyObject* func = PyCFunction_New(&PythonQtClassWrapper_methods[i], obj);
PyDict_SetItemString(dict, PythonQtClassWrapper_methods[i].ml_name, func);
Py_DECREF(func);
}
PyDict_Update(dict, objectDict);
return dict;
}
// look in Python to support derived Python classes
PyObject* superAttr = PyType_Type.tp_getattro(obj, name);
if (superAttr) {
return superAttr;
}
PyErr_Clear();
if (wrapper->classInfo()) {
PythonQtMemberInfo member = wrapper->classInfo()->member(attributeName);
if (member._type == PythonQtMemberInfo::EnumValue) {
PyObject* enumValue = member._enumValue;
Py_INCREF(enumValue);
return enumValue;
} else if (member._type == PythonQtMemberInfo::EnumWrapper) {
PyObject* enumWrapper = member._enumWrapper;
Py_INCREF(enumWrapper);
return enumWrapper;
} else if (member._type == PythonQtMemberInfo::Slot) {
// we return all slots, even the instance slots, since they are callable as unbound slots with self argument
return PythonQtSlotFunction_New(member._slot, obj, NULL);
} else if (member._type == PythonQtMemberInfo::Signal) {
// we return all signals, even the instance signals, since they are callable as unbound signals with self argument
return PythonQtSignalFunction_New(member._slot, obj, NULL);
}
}
// look for the internal methods (className(), help())
PyObject* internalMethod = Py_FindMethod( PythonQtClassWrapper_methods, obj, (char*)attributeName);
if (internalMethod) {
return internalMethod;
}
QString error = QString(wrapper->classInfo()->className()) + " has no attribute named '" + QString(attributeName) + "'";
PyErr_SetString(PyExc_AttributeError, error.toLatin1().data());
return NULL;
}
static int PythonQtClassWrapper_setattro(PyObject *obj,PyObject *name,PyObject *value)
{
return PyType_Type.tp_setattro(obj,name,value);
}
/*
static PyObject * PythonQtClassWrapper_repr(PyObject * obj)
{
PythonQtClassWrapper* wrapper = (PythonQtClassWrapper*)obj;
if (wrapper->classInfo()->isCPPWrapper()) {
const QMetaObject* meta = wrapper->classInfo()->metaObject();
if (!meta) {
QObject* decorator = wrapper->classInfo()->decorator();
if (decorator) {
meta = decorator->metaObject();
}
}
if (meta) {
return PyString_FromFormat("%s Class (C++ wrapped by %s)", wrapper->classInfo()->className(), meta->className());
} else {
return PyString_FromFormat("%s Class (C++ unwrapped)", wrapper->classInfo()->className());
}
} else {
return PyString_FromFormat("%s Class", wrapper->classInfo()->className());
}
}
*/
PyTypeObject PythonQtClassWrapper_Type = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"PythonQt.PythonQtClassWrapper", /*tp_name*/
sizeof(PythonQtClassWrapper), /*tp_basicsize*/
0, /*tp_itemsize*/
0, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, //PythonQtClassWrapper_repr, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
PythonQtClassWrapper_getattro, /*tp_getattro*/
PythonQtClassWrapper_setattro, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)PythonQtClassWrapper_init, /* tp_init */
PythonQtClassWrapper_alloc, /* tp_alloc */
0, /* tp_new */
0, /* tp_free */
};
//-------------------------------------------------------