ITK  4.2.0
Insight Segmentation and Registration Toolkit
Public Types | Public Member Functions | Static Public Member Functions | Private Attributes
itk::TimeStamp Class Reference

#include <itkTimeStamp.h>

List of all members.

Public Types

typedef TimeStamp Self

Public Member Functions

void Delete ()
unsigned long GetMTime () const
void Modified ()
 operator unsigned long () const
const Selfoperator= (const Self &other)
 TimeStamp ()
bool operator> (TimeStamp &ts)
bool operator< (TimeStamp &ts)

Static Public Member Functions

static const char * GetNameOfClass ()
static SelfNew ()

Private Attributes

unsigned long m_ModifiedTime

Detailed Description

Generate a unique, increasing time value.

TimeStamp 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 TimeStamp objects.

Warning:
On most platforms, this class uses a lock-free incremental counter. The Modified function can safely be called simultaneously by multiple threads on different instances of the class. However, calling the Modified function by different threads on the same instance of the class can lead to some unexpected behavior. The global counter will always be correct but the local m_ModifiedTime might not (see http://www.itk.org/mailman/private/insight-developers/2009-February/011732.html for more detail).

Definition at line 57 of file itkTimeStamp.h.


Member Typedef Documentation

Standard class typedefs.

Definition at line 61 of file itkTimeStamp.h.


Constructor & Destructor Documentation

itk::TimeStamp::TimeStamp ( )
inline

Constructor must remain public because classes instantiate TimeStamps implicitly in their construction.

Definition at line 69 of file itkTimeStamp.h.


Member Function Documentation

void itk::TimeStamp::Delete ( )
inline

Destoy this instance.

Definition at line 73 of file itkTimeStamp.h.

unsigned long itk::TimeStamp::GetMTime ( void  ) const
inline

Return this object's Modified time.

Definition at line 90 of file itkTimeStamp.h.

static const char* itk::TimeStamp::GetNameOfClass ( )
inlinestatic

The class name as a string.

Definition at line 77 of file itkTimeStamp.h.

void itk::TimeStamp::Modified ( )

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.

Referenced by itk::MatrixOffsetTransformBase< TScalarType, 3, 3 >::SetMatrix(), itk::MatrixOffsetTransformBase< TScalarType, 3, 3 >::SetVarInverseMatrix(), and itk::MatrixOffsetTransformBase< TScalarType, 3, 3 >::SetVarMatrix().

static Self* itk::TimeStamp::New ( )
static

Create an instance of this class. We don't want to use reference counting.

itk::TimeStamp::operator unsigned long ( ) const
inline

Allow for typcasting to unsigned long.

Definition at line 101 of file itkTimeStamp.h.

bool itk::TimeStamp::operator< ( TimeStamp ts)
inline

Support comparisons of time stamp objects directly.

Definition at line 96 of file itkTimeStamp.h.

References m_ModifiedTime.

const Self& itk::TimeStamp::operator= ( const Self other)

Assignment operator, allows to initialize one time stamp by copying from another.

bool itk::TimeStamp::operator> ( TimeStamp ts)
inline

Support comparisons of time stamp objects directly.

Definition at line 94 of file itkTimeStamp.h.

References m_ModifiedTime.


Member Data Documentation

unsigned long itk::TimeStamp::m_ModifiedTime
private

Definition at line 109 of file itkTimeStamp.h.

Referenced by operator<(), and operator>().


The documentation for this class was generated from the following file: