mitkMemoryUtilities.h

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/*===================================================================

The Medical Imaging Interaction Toolkit (MITK)

Copyright (c) German Cancer Research Center,
Division of Medical and Biological Informatics.
All rights reserved.

This software is distributed WITHOUT ANY WARRANTY; without
even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE.

See LICENSE.txt or http://www.mitk.org for details.

===================================================================*/

#ifndef _MITK_MEMORY_UTILITIES_H_
#define _MITK_MEMORY_UTILITIES_H_

#include <MitkCoreExports.h>
#include <itkMacro.h>

namespace mitk
{
  class MITKCORE_EXPORT MemoryUtilities
  {
  public:
    static size_t GetProcessMemoryUsage();

    static size_t GetTotalSizeOfPhysicalRam();

    template <typename ElementType>
    static ElementType *AllocateElements(size_t numberOfElements, bool noThrow = false)
    {
      // Encapsulate all image memory allocation here to throw an
      // exception when memory allocation fails even when the compiler
      // does not do this by default.
      ElementType *data = nullptr;
      try
      {
        data = new ElementType[numberOfElements];
      }
      catch (...)
      {
        data = nullptr;
      }
      if ((data == nullptr) && (noThrow == false))
      {
        throw itk::MemoryAllocationError(__FILE__, __LINE__, "Failed to allocate memory.", ITK_LOCATION);
      }
      return data;
    }

    template <typename ElementType>
    static void DeleteElements(ElementType *elements)
    {
      if (elements != NULL)
      {
        delete[] elements;
      }
    }

  protected:
#ifndef _MSC_VER
    static int ReadStatmFromProcFS(
      int *size, int *res, int *shared, int *text, int *sharedLibs, int *stack, int *dirtyPages);
#endif
  };
} // end of namespace mitk

#endif