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/* ========================================================================
* PROJECT: ARToolKitPlus
* ========================================================================
* This work is based on the original ARToolKit developed by
* Hirokazu Kato
* Mark Billinghurst
* HITLab, University of Washington, Seattle
* http://www.hitl.washington.edu/artoolkit/
*
* Copyright of the derived and new portions of this work
* (C) 2006 Graz University of Technology
*
* This framework is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This framework 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this framework; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* For further information please contact
* Dieter Schmalstieg
* <schmalstieg@icg.tu-graz.ac.at>
* Graz University of Technology,
* Institut for Computer Graphics and Vision,
* Inffeldgasse 16a, 8010 Graz, Austria.
* ========================================================================
** @author Daniel Wagner
*
* $Id: MemoryManagerMemMap.h 162 2006-04-19 21:28:10Z grabner $
* @file
* ======================================================================== */
#ifndef __ARTOOLKITPLUS_MEMORYMANAGERMEMMAP_HEADERFILE__
#define __ARTOOLKITPLUS_MEMORYMANAGERMEMMAP_HEADERFILE__
#if defined(_MSC_VER) || defined(_WIN32_WCE)
#include "MemoryManager.h"
#include <windows.h>
namespace ARToolKitPlus
{
/// A MemoryManager that uses a memory mapped file (without file backup) for basic allocation
/**
* Currently this memory manager is *very* simple. only an initial block is allocated.
* No more blocks are allocated, which means that the value passed to init() must be large
* enough to hold all blocks every reserved with getMemory(). Furthermore, memory is not
* released when calling releaseMemory().
* To sum it up, this memmory manager is only useful if the full amount of data required is
* known beforehand and has not to be freed before the full object is deleted (using deinit()).
*/
class ARTOOLKITPLUS_API MemoryManagerMemMap : public MemoryManager
{
public:
MemoryManagerMemMap();
~MemoryManagerMemMap();
bool init(size_t nNumInitialBytes, size_t nNumGrowBytes=0);
bool deinit();
bool didInit();
unsigned int getBytesAllocated() { return (int)fullSize; }
void* getMemory(size_t nNumBytes);
void releaseMemory(void* nMemoryBlock);
protected:
bool _didInit;
LPVOID lpvMem; // pointer to shared memory
HANDLE hMapObject; // handle to file mapping
size_t fullSize,
reservedSize;
};
} // namespace ARToolKitPlus
#endif
#endif //__ARTOOLKITPLUS_MEMORYMANAGERMEMMAP_HEADERFILE__
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