itkMemoryUsageObserver.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkMemoryUsageObserver_h
#define __itkMemoryUsageObserver_h

#include "itkConfigure.h"
#include "itkMacro.h"
#include "itkObject.h"
#include "itkObjectFactory.h"
#include "itkIntTypes.h"

#if defined( WIN32 ) || defined( _WIN32 )
  #include <windows.h>
  #define SUPPORT_TOOLHELP32
  #if defined( SUPPORT_TOOLHELP32 )
typedef LONG NTSTATUS;
  #endif
#endif

namespace itk
{
class ITKCommon_EXPORT MemoryUsageObserverBase
{
public:
  typedef SizeValueType MemoryLoadType;

  virtual ~MemoryUsageObserverBase();

  virtual MemoryLoadType GetMemoryUsage() = 0;
};

#if defined( WIN32 ) || defined( _WIN32 )
class ITKCommon_EXPORT WindowsMemoryUsageObserver:public MemoryUsageObserverBase
{
public:
  WindowsMemoryUsageObserver();
  virtual ~WindowsMemoryUsageObserver();

  virtual MemoryLoadType GetMemoryUsage();

protected:
#if defined( SUPPORT_TOOLHELP32 )
  typedef NTSTATUS ( WINAPI * PZwQuerySystemInformation )(UINT, PVOID, ULONG, PULONG);

  // handle ntdll.dll library
  HMODULE m_hNTLib;
  // Windows native API function to query system information
  PZwQuerySystemInformation ZwQuerySystemInformation;
#endif // defined(SUPPORT_TOOLHELP32)
};
#endif // defined(WIN32) || defined(_WIN32)

#ifdef linux
class ITKCommon_EXPORT LinuxMemoryUsageObserver:public MemoryUsageObserverBase
{
public:
  virtual ~LinuxMemoryUsageObserver();
  virtual MemoryLoadType GetMemoryUsage();
};
#endif // linux


#if defined( __APPLE__ )
class ITKCommon_EXPORT MacOSXMemoryUsageObserver:public MemoryUsageObserverBase
{
public:
  virtual ~MacOSXMemoryUsageObserver();
  virtual MemoryLoadType GetMemoryUsage() ITK_OVERRIDE;
};
#endif // Mac OS X


#if defined( __SUNPRO_CC ) || defined ( __sun__ )
class ITKCommon_EXPORT SunSolarisMemoryUsageObserver:public MemoryUsageObserverBase
{
public:
  virtual ~SunSolarisMemoryUsageObserver();
  virtual MemoryLoadType GetMemoryUsage();
};
#endif // Sun Solaris


#if !defined( WIN32 ) && !defined( _WIN32 )
class ITKCommon_EXPORT SysResourceMemoryUsageObserver:public MemoryUsageObserverBase
{
public:
  virtual ~SysResourceMemoryUsageObserver();
  virtual MemoryLoadType GetMemoryUsage() ITK_OVERRIDE;
};
#if !defined( __APPLE__ ) && !defined( __SUNPRO_CC ) && !defined ( __sun__ ) && !defined( __FreeBSD__ ) \
  && !defined( __OpenBSD__ )

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