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