MeVis/Foundation/Sources/MLMemoryManager/Include/mlMemoryBlockHandle.h

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// **InsertLicense** code
//-----------------------------------------------------------------------------
// The handle of a memory block.
//
// \file    mlMemoryBlockHandle.h
// \author  Marcus Barann
// \date    03/2008
//
//-----------------------------------------------------------------------------

#ifndef MLMEMORYBLOCKHANDLE_H_INCLUDED
#define MLMEMORYBLOCKHANDLE_H_INCLUDED

#ifdef _MSC_VER
// Disable all system header warnings.
#pragma warning( push,0 )
#endif
#include <cstddef>
#ifdef _MSC_VER
#pragma warning( pop )
#endif

#include "../mlMemoryManagerDllExport.h"


class MLMemoryBlock;
class MLWeakMemoryBlockHandle;


class MLMEMORYMANAGER_EXPORT MLMemoryBlockHandle
{
public:
  MLMemoryBlockHandle();
  MLMemoryBlockHandle(const MLMemoryBlockHandle& memoryBlockHandle);
  MLMemoryBlockHandle(const MLWeakMemoryBlockHandle& weakMemoryBlockHandle);

  ~MLMemoryBlockHandle();

  bool isNull() const;

  void* data() const;

  size_t size() const;

  void clear();



  MLMemoryBlockHandle& operator=(const MLMemoryBlockHandle& memoryBlockHandle);

  MLMemoryBlockHandle& operator=(const MLWeakMemoryBlockHandle& weakMemoryBlockHandle);
 // End of group ThreadSafe


#ifndef DOXYGEN_SHOULD_SKIP_THIS

private:
  void setMemoryBlockFromStrongHandle(const MLMemoryBlockHandle& memoryBlockHandle);
  void setMemoryBlockFromWeakHandle(const MLWeakMemoryBlockHandle& weakMemoryBlockHandle);

private:
  MLMemoryBlock* _memoryBlock;

  friend class MLMemoryBlock;
  friend class MLMemoryManager;
  friend class MLWeakMemoryBlockHandle;
#endif
};

#endif // MLMEMORYBLOCKHandle_H_INCLUDED