GIT_REPOSITORIES/LPP/PythonQt Files · src/PythonQtMisc.h

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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             PythonQtMisc.h
        
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        ezust
    
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      #ifndef _PYTHONQTMISC_H

      #define _PYTHONQTMISC_H

      /*

       *

        florianlink
    
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       *  Copyright (C) 2010 MeVis Medical Solutions AG All Rights Reserved.

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       *

       *  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

       *

        florianlink
    
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       *  Contact information: MeVis Medical Solutions AG, Universitaetsallee 29,

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       *  28359 Bremen, Germany or:

       *

       *  http://www.mevis.de

       *

       */

      //----------------------------------------------------------------------------------

      /*!

      // \file    PythonQtMisc.h

      // \author  Florian Link

      // \author  Last changed by $Author: florian $

      // \date    2006-05

      */

      //----------------------------------------------------------------------------------

      #include <QList>

      #define PythonQtValueStorage_ADD_VALUE(store, type, value, ptr) \

      {  type* item = (type*)store.nextValuePtr(); \

         *item = value; \

         ptr = (void*)item; \

      }

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      #define PythonQtValueStorage_ADD_VALUE_IF_NEEDED(alreadyAllocatedPtr,store, type, value, ptr) \

      { \

        type* item = (type*)(alreadyAllocatedPtr?alreadyAllocatedPtr:store.nextValuePtr()); \

        *item = value; \

        ptr = (void*)item; \

      }

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      //! stores a position in the PythonQtValueStorage

      class PythonQtValueStoragePosition {

      public:

        PythonQtValueStoragePosition() { chunkIdx = 0; chunkOffset = 0; }

        int chunkIdx;

        int chunkOffset;

      };

      //! a helper class that stores basic C++ value types in chunks

      template <typename T, int chunkEntries> class PythonQtValueStorage

      {

      public:

        PythonQtValueStorage() {

          _chunkIdx  = 0;

          _chunkOffset = 0;

          _currentChunk = new T[chunkEntries];

          _chunks.append(_currentChunk);

        };

        //! clear all memory

        void clear() {

          T* chunk;

          foreach(chunk, _chunks) {

            delete[]chunk;

          }

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          _chunks.clear();

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        }

        //! get the current position to be restored with setPos

        void getPos(PythonQtValueStoragePosition & pos) {

          pos.chunkIdx = _chunkIdx;

          pos.chunkOffset = _chunkOffset;

        }

        //! set the current position (without freeing memory, thus caching old entries for reuse)

        void setPos(const PythonQtValueStoragePosition& pos) {

          _chunkOffset = pos.chunkOffset;

          if (_chunkIdx != pos.chunkIdx) {

            _chunkIdx = pos.chunkIdx;

            _currentChunk = _chunks.at(_chunkIdx);

          }

        }

        //! add one default constructed value and return the pointer to it

        T* nextValuePtr() {

          if (_chunkOffset>=chunkEntries) {

            _chunkIdx++;

            if (_chunkIdx >= _chunks.size()) {

              T* newChunk = new T[chunkEntries];

              _chunks.append(newChunk);

              _currentChunk = newChunk;

            } else {

              _currentChunk = _chunks.at(_chunkIdx);

            }

            _chunkOffset = 0;

          }

          T* newEntry = _currentChunk + _chunkOffset;

          _chunkOffset++;

          return newEntry;

        };

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      protected:

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        QList<T*> _chunks;

        int _chunkIdx;

        int _chunkOffset;

        T*  _currentChunk;

      };

        florianlink
    
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              r157
            
      //! a helper class that stores basic C++ value types in chunks and clears the unused values on setPos() usage.

      template <typename T, int chunkEntries> class PythonQtValueStorageWithCleanup : public PythonQtValueStorage<T, chunkEntries>

      {  

      public:

        void setPos(const PythonQtValueStoragePosition& pos) {

          if (_chunkIdx > pos.chunkIdx) {

            T*  firstChunk = _chunks.at(pos.chunkIdx);

            // clear region in first chunk

            for (int i = pos.chunkOffset; i < chunkEntries; i++) {

              firstChunk[i] = T();

            }

            for (int chunk = pos.chunkIdx + 1; chunk < _chunkIdx; chunk++) {

              // clear the full chunks between the first and last chunk

              T*  fullChunk = _chunks.at(chunk);

              for (int i = 0; i < chunkEntries; i++) {

                fullChunk[i] = T();

              }

            }

            // clear region in last chunk

            T*  lastChunk = _chunks.at(_chunkIdx);

            for (int i = 0; i < _chunkOffset; i++) {

              lastChunk[i] = T();

            }

          } else if (_chunkIdx == pos.chunkIdx) {

            // clear the region in the last chunk only

            T*  lastChunk = _chunks.at(_chunkIdx);

            for (int i = pos.chunkOffset; i<_chunkOffset; i++) {

              lastChunk[i] = T();

            }

          }

          PythonQtValueStorage<T, chunkEntries>::setPos(pos);

        }

      private:

        using PythonQtValueStorage<T, chunkEntries>::_chunks;

        using PythonQtValueStorage<T, chunkEntries>::_chunkIdx;

        using PythonQtValueStorage<T, chunkEntries>::_chunkOffset;

        using PythonQtValueStorage<T, chunkEntries>::_currentChunk;

      };

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      #endif

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ezust reorganized SVN tree into branches, tags and trunk...	r0	#ifndef _PYTHONQTMISC_H
		#define _PYTHONQTMISC_H

		/*
		*
florianlink updated old license information and current date...	r133	* Copyright (C) 2010 MeVis Medical Solutions AG All Rights Reserved.
ezust reorganized SVN tree into branches, tags and trunk...	r0	*
		* 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
		*
florianlink updated old license information and current date...	r133	* Contact information: MeVis Medical Solutions AG, Universitaetsallee 29,
ezust reorganized SVN tree into branches, tags and trunk...	r0	* 28359 Bremen, Germany or:
		*
		* http://www.mevis.de
		*
		*/

		//----------------------------------------------------------------------------------
		/*!
		// \file PythonQtMisc.h
		// \author Florian Link
		// \author Last changed by $Author: florian $
		// \date 2006-05
		*/
		//----------------------------------------------------------------------------------


		#include <QList>

		#define PythonQtValueStorage_ADD_VALUE(store, type, value, ptr) \
		{ type* item = (type*)store.nextValuePtr(); \
		*item = value; \
		ptr = (void*)item; \
		}

florianlink - added support for deriving CPP classes in Python and to override all public and protected virtual functions from PythonQt...	r24	#define PythonQtValueStorage_ADD_VALUE_IF_NEEDED(alreadyAllocatedPtr,store, type, value, ptr) \
		{ \
		type* item = (type*)(alreadyAllocatedPtr?alreadyAllocatedPtr:store.nextValuePtr()); \
		*item = value; \
		ptr = (void*)item; \
		}

ezust reorganized SVN tree into branches, tags and trunk...	r0	//! stores a position in the PythonQtValueStorage
		class PythonQtValueStoragePosition {

		public:
		PythonQtValueStoragePosition() { chunkIdx = 0; chunkOffset = 0; }

		int chunkIdx;
		int chunkOffset;

		};

		//! a helper class that stores basic C++ value types in chunks
		template <typename T, int chunkEntries> class PythonQtValueStorage
		{
		public:
		PythonQtValueStorage() {
		_chunkIdx = 0;
		_chunkOffset = 0;
		_currentChunk = new T[chunkEntries];
		_chunks.append(_currentChunk);
		};

		//! clear all memory
		void clear() {
		T* chunk;
		foreach(chunk, _chunks) {
		delete[]chunk;
		}
florianlink - removed warnings...	r8	_chunks.clear();
ezust reorganized SVN tree into branches, tags and trunk...	r0	}

		//! get the current position to be restored with setPos
		void getPos(PythonQtValueStoragePosition & pos) {
		pos.chunkIdx = _chunkIdx;
		pos.chunkOffset = _chunkOffset;
		}

		//! set the current position (without freeing memory, thus caching old entries for reuse)
		void setPos(const PythonQtValueStoragePosition& pos) {
		_chunkOffset = pos.chunkOffset;
		if (_chunkIdx != pos.chunkIdx) {
		_chunkIdx = pos.chunkIdx;
		_currentChunk = _chunks.at(_chunkIdx);
		}
		}

		//! add one default constructed value and return the pointer to it
		T* nextValuePtr() {
		if (_chunkOffset>=chunkEntries) {
		_chunkIdx++;
		if (_chunkIdx >= _chunks.size()) {
		T* newChunk = new T[chunkEntries];
		_chunks.append(newChunk);
		_currentChunk = newChunk;
		} else {
		_currentChunk = _chunks.at(_chunkIdx);
		}
		_chunkOffset = 0;
		}
		T* newEntry = _currentChunk + _chunkOffset;
		_chunkOffset++;
		return newEntry;
		};

florianlink updated to upstream state in MeVisLab repository...	r157	protected:
ezust reorganized SVN tree into branches, tags and trunk...	r0	QList<T*> _chunks;

		int _chunkIdx;
		int _chunkOffset;
		T* _currentChunk;

		};

florianlink updated to upstream state in MeVisLab repository...	r157	//! a helper class that stores basic C++ value types in chunks and clears the unused values on setPos() usage.
		template <typename T, int chunkEntries> class PythonQtValueStorageWithCleanup : public PythonQtValueStorage<T, chunkEntries>
		{
		public:
		void setPos(const PythonQtValueStoragePosition& pos) {
		if (_chunkIdx > pos.chunkIdx) {
		T* firstChunk = _chunks.at(pos.chunkIdx);
		// clear region in first chunk
		for (int i = pos.chunkOffset; i < chunkEntries; i++) {
		firstChunk[i] = T();
		}
		for (int chunk = pos.chunkIdx + 1; chunk < _chunkIdx; chunk++) {
		// clear the full chunks between the first and last chunk
		T* fullChunk = _chunks.at(chunk);
		for (int i = 0; i < chunkEntries; i++) {
		fullChunk[i] = T();
		}
		}
		// clear region in last chunk
		T* lastChunk = _chunks.at(_chunkIdx);
		for (int i = 0; i < _chunkOffset; i++) {
		lastChunk[i] = T();
		}
		} else if (_chunkIdx == pos.chunkIdx) {
		// clear the region in the last chunk only
		T* lastChunk = _chunks.at(_chunkIdx);
		for (int i = pos.chunkOffset; i<_chunkOffset; i++) {
		lastChunk[i] = T();
		}
		}

		PythonQtValueStorage<T, chunkEntries>::setPos(pos);
		}

		private:
		using PythonQtValueStorage<T, chunkEntries>::_chunks;
		using PythonQtValueStorage<T, chunkEntries>::_chunkIdx;
		using PythonQtValueStorage<T, chunkEntries>::_chunkOffset;
		using PythonQtValueStorage<T, chunkEntries>::_currentChunk;
		};
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		#endif