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vtkTimeStamp.h
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vtkTimeStamp.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTimeStamp.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/**
* @class vtkTimeStamp
* @brief record modification and/or execution time
*
* vtkTimeStamp records a unique time when the method Modified() is
* executed. This time is guaranteed to be monotonically increasing.
* Classes use this object to record modified and/or execution time.
* There is built in support for the binary < and > comparison
* operators between two vtkTimeStamp objects.
*/
#ifndef vtkTimeStamp_h
#define vtkTimeStamp_h
#include "vtkCommonCoreModule.h" // For export macro
#include "vtkSystemIncludes.h"
class VTKCOMMONCORE_EXPORT vtkTimeStamp
{
public:
vtkTimeStamp() {this->ModifiedTime = 0;};
static vtkTimeStamp *New();
void Delete() {delete this;};
/**
* Set this objects time to the current time. The current time is
* just a monotonically increasing unsigned long integer. It is
* possible for this number to wrap around back to zero.
* This should only happen for processes that have been running
* for a very long time, while constantly changing objects
* within the program. When this does occur, the typical consequence
* should be that some filters will update themselves when really
* they don't need to.
*/
void Modified();
/**
* Return this object's Modified time.
*/
vtkMTimeType GetMTime() const {return this->ModifiedTime;};
//@{
/**
* Support comparisons of time stamp objects directly.
*/
bool operator>(vtkTimeStamp& ts) {
return (this->ModifiedTime > ts.ModifiedTime);};
bool operator<(vtkTimeStamp& ts) {
return (this->ModifiedTime < ts.ModifiedTime);};
//@}
/**
* Allow for typecasting to unsigned long.
*/
operator vtkMTimeType() const {return this->ModifiedTime;};
private:
vtkMTimeType ModifiedTime;
};
#endif
// VTK-HeaderTest-Exclude: vtkTimeStamp.h