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75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkTimeStamp.h
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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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/**
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* @class vtkTimeStamp
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* @brief record modification and/or execution time
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*
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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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*/
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#ifndef vtkTimeStamp_h
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#define vtkTimeStamp_h
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#include "vtkCommonCoreModule.h" // For export macro
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#include "vtkSystemIncludes.h"
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class VTKCOMMONCORE_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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/**
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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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*/
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void Modified();
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/**
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* Return this object's Modified time.
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*/
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vtkMTimeType GetMTime() const { return this->ModifiedTime; }
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//@{
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/**
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* Support comparisons of time stamp objects directly.
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*/
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bool operator>(vtkTimeStamp& ts) { return (this->ModifiedTime > ts.ModifiedTime); }
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bool operator<(vtkTimeStamp& ts) { return (this->ModifiedTime < ts.ModifiedTime); }
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//@}
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/**
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* Allow for typecasting to unsigned long.
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*/
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operator vtkMTimeType() const { return this->ModifiedTime; }
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private:
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vtkMTimeType ModifiedTime;
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};
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#endif
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// VTK-HeaderTest-Exclude: vtkTimeStamp.h
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