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/*
* This file is part of the Shiboken Python Bindings Generator project.
*
* Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
*
* Contact: PySide team <contact@pyside.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation. 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.
*
* As a special exception to the GNU Lesser General Public License
* version 2.1, the object code form of a "work that uses the Library"
* may incorporate material from a header file that is part of the
* Library. You may distribute such object code under terms of your
* choice, provided that the incorporated material (i) does not exceed
* more than 5% of the total size of the Library; and (ii) is limited to
* numerical parameters, data structure layouts, accessors, macros,
* inline functions and templates.
*
* This program 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include "basewrapper.h"
#include "bindingmanager.h"
#include "google/dense_hash_map"
namespace Shiboken
{
typedef google::dense_hash_map<const void*, PyObject*> WrapperMap;
struct BindingManager::BindingManagerPrivate {
WrapperMap wrapperMapper;
void releaseWrapper(void* cptr);
void assignWrapper(PyObject* wrapper, const void* cptr);
};
void BindingManager::BindingManagerPrivate::releaseWrapper(void* cptr)
{
WrapperMap::iterator iter = wrapperMapper.find(cptr);
if (iter != wrapperMapper.end())
wrapperMapper.erase(iter);
}
void BindingManager::BindingManagerPrivate::assignWrapper(PyObject* wrapper, const void* cptr)
{
assert(cptr);
WrapperMap::iterator iter = wrapperMapper.find(cptr);
if (iter == wrapperMapper.end())
wrapperMapper.insert(std::make_pair(cptr, wrapper));
else
iter->second = wrapper;
}
BindingManager::BindingManager()
{
m_d = new BindingManager::BindingManagerPrivate;
m_d->wrapperMapper.set_empty_key((WrapperMap::key_type)0);
m_d->wrapperMapper.set_deleted_key((WrapperMap::key_type)1);
}
BindingManager::~BindingManager()
{
delete m_d;
}
BindingManager& BindingManager::instance() {
static BindingManager singleton;
return singleton;
}
bool BindingManager::hasWrapper(const void* cptr)
{
return m_d->wrapperMapper.count(cptr);
}
void BindingManager::registerWrapper(SbkBaseWrapper* pyobj)
{
SbkBaseWrapperType* instanceType = reinterpret_cast<SbkBaseWrapperType*>(pyobj->ob_type);
void* cptr = pyobj->cptr;
if (instanceType->mi_init && !instanceType->mi_offsets)
instanceType->mi_offsets = instanceType->mi_init(cptr);
m_d->assignWrapper(reinterpret_cast<PyObject*>(pyobj), cptr);
if (instanceType->mi_offsets) {
int* offset = instanceType->mi_offsets;
while (*offset != -1) {
if (*offset > 0)
m_d->assignWrapper(reinterpret_cast<PyObject*>(pyobj), reinterpret_cast<void*>((std::size_t) cptr + (*offset)));
offset++;
}
}
}
void BindingManager::releaseWrapper(PyObject* wrapper)
{
void* cptr = SbkBaseWrapper_cptr(wrapper);
m_d->releaseWrapper(cptr);
if (((SbkBaseWrapperType*) wrapper->ob_type)->mi_offsets) {
int* offset = ((SbkBaseWrapperType*) wrapper->ob_type)->mi_offsets;
while (*offset != -1) {
if (*offset > 0)
m_d->releaseWrapper((void*) ((size_t) cptr + (*offset)));
offset++;
}
}
}
PyObject* BindingManager::retrieveWrapper(const void* cptr)
{
WrapperMap::iterator iter = m_d->wrapperMapper.find(cptr);
if (iter == m_d->wrapperMapper.end())
return 0;
return iter->second;
}
PyObject* BindingManager::getOverride(const void* cptr, const char* methodName)
{
PyObject* wrapper = retrieveWrapper(cptr);
if (!wrapper)
return 0;
if (SbkBaseWrapper_instanceDict(wrapper)) {
PyObject* method = PyDict_GetItemString(SbkBaseWrapper_instanceDict(wrapper), methodName);
if (method) {
Py_INCREF(method);
return method;
}
}
PyObject* pyMethodName = PyString_FromString(methodName);
PyObject* method = PyObject_GetAttr(wrapper, pyMethodName);
if (method && PyMethod_Check(method) && reinterpret_cast<PyMethodObject*>(method)->im_self == wrapper) {
PyObject* defaultMethod;
PyObject* mro = wrapper->ob_type->tp_mro;
// The first class in the mro (index 0) is the class being checked and it should not be tested.
// The last class in the mro (size - 1) is the base Python object class which should not be tested also.
for (int i = 1; i < PyTuple_GET_SIZE(mro) - 1; i++) {
PyTypeObject* parent = reinterpret_cast<PyTypeObject*>(PyTuple_GET_ITEM(mro, i));
if (parent->tp_dict) {
defaultMethod = PyDict_GetItem(parent->tp_dict, pyMethodName);
if (defaultMethod && reinterpret_cast<PyMethodObject*>(method)->im_func != defaultMethod) {
Py_DECREF(pyMethodName);
return method;
}
}
}
}
Py_XDECREF(method);
Py_DECREF(pyMethodName);
return 0;
}
void BindingManager::invalidateWrapper(SbkBaseWrapper* wrapper)
{
if (!SbkBaseWrapper_validCppObject(wrapper))
return;
SbkBaseWrapper_setValidCppObject(wrapper, false);
SbkBaseWrapper_setOwnership(wrapper, false);
// If it is a parent invalidate all children.
if (SbkBaseWrapper_hasParentInfo(wrapper)) {
ShiboChildrenList::iterator it = wrapper->parentInfo->children.begin();
for (; it != wrapper->parentInfo->children.end(); ++it)
invalidateWrapper(*it);
}
releaseWrapper(reinterpret_cast<PyObject*>(wrapper));
}
void BindingManager::invalidateWrapper(const void* cptr)
{
WrapperMap::iterator iter = m_d->wrapperMapper.find(cptr);
if (iter != m_d->wrapperMapper.end())
invalidateWrapper(iter->second);
}
void BindingManager::transferOwnershipToCpp(SbkBaseWrapper* wrapper)
{
if (wrapper->parentInfo)
Shiboken::removeParent(wrapper);
if (SbkBaseWrapper_containsCppWrapper(wrapper))
SbkBaseWrapper_setOwnership(wrapper, false);
else
invalidateWrapper(wrapper);
}
} // namespace Shiboken
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