itom 1.1.0
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00001 /* ******************************************************************** 00002 itom software 00003 URL: http://www.uni-stuttgart.de/ito 00004 Copyright (C) 2013, Institut fuer Technische Optik (ITO), 00005 Universitaet Stuttgart, Germany 00006 00007 This file is part of itom. 00008 00009 itom is free software; you can redistribute it and/or modify it 00010 under the terms of the GNU Library General Public Licence as published by 00011 the Free Software Foundation; either version 2 of the Licence, or (at 00012 your option) any later version. 00013 00014 itom is distributed in the hope that it will be useful, but 00015 WITHOUT ANY WARRANTY; without even the implied warranty of 00016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library 00017 General Public Licence for more details. 00018 00019 You should have received a copy of the GNU Library General Public License 00020 along with itom. If not, see <http://www.gnu.org/licenses/>. 00021 *********************************************************************** */ 00022 00023 #ifndef PYTHONSHAREDPOINTERGUARD_H 00024 #define PYTHONSHAREDPOINTERGUARD_H 00025 00026 //python 00027 // see http://vtk.org/gitweb?p=VTK.git;a=commitdiff;h=7f3f750596a105d48ea84ebfe1b1c4ca03e0bab3 00028 #if (defined _DEBUG) && (!defined linux) 00029 #undef _DEBUG 00030 #include "Python.h" 00031 #define _DEBUG 00032 #else 00033 #include "Python.h" 00034 #endif 00035 00036 #include "../../common/sharedStructures.h" 00037 #include "../global.h" 00038 00039 #include <qhash.h> 00040 #include <qsharedpointer.h> 00041 00042 namespace ito 00043 { 00044 00045 class PythonSharedPointerGuard 00046 { 00047 public: 00048 static PyObject *tParamToPyObject(ito::ParamBase ¶m); 00049 00050 template<typename _Tp> static void deleter(_Tp *sharedPointerData) 00051 { 00052 QHash<void*, PyObject*>::iterator i = m_hashTable.find((void*)sharedPointerData); 00053 if(i != m_hashTable.end()) 00054 { 00055 Py_XDECREF(i.value()); 00056 m_hashTable.erase(i); 00057 } 00058 } 00059 00060 template<typename _Tp> static QSharedPointer<_Tp> createPythonSharedPointer(_Tp *sharedPointerData, PyObject *pyObjOwner) 00061 { 00062 Py_XINCREF(pyObjOwner); 00063 m_hashTable.insert((void*)sharedPointerData, pyObjOwner); 00064 return QSharedPointer<_Tp>(sharedPointerData, deleter<_Tp>); 00065 } 00066 00067 private: 00068 static QHash<void* /*sharedPointerData*/, PyObject* /*pyObjOwner*/> m_hashTable; //elements in this hash-table are pyObjects (type byteArray, unicode...), whose inlying char*-pointer is given to a QSharedPointer<char>. Before giving it to the shared pointer, the reference of the pyObject is incremented. If the deleter of the sharedPointer is called, it does not delete the char-array, but decrements the PyObject and deletes it from this hash-table (used in getVal) 00069 00070 }; 00071 00072 } //namespace ito 00073 00074 #endif