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vtkCriticalSection Class Reference

critical section locking class. More...

#include <vtkCriticalSection.h>

Inheritance diagram for vtkCriticalSection:

[legend]Collaboration diagram for vtkCriticalSection:

[legend]List of all members.

Public Methods
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
void	Lock (void)
void	Unlock (void)
Static Public Methods
vtkCriticalSection *	New ()
int	IsTypeOf (const char *type)
vtkCriticalSection *	SafeDownCast (vtkObject *o)
Protected Attributes
vtkSimpleCriticalSection	SimpleCriticalSection

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Detailed Description

critical section locking class.

Date:

2000/12/10 20:08:07

Revision:

1.5

vtkCriticalSection allows the locking of variables which are accessed through different threads. This header file also defines vtkSimpleCriticalSection which is not a subclass of vtkObject. The API is identical to that of vtkMutexLock, and the behavior is identical as well, except on Windows 9x/NT platforms. The only difference on these platforms is that vtkMutexLock is more flexible, in that it works across processes as well as across threads, but also costs more, in that it evokes a 600-cycle x86 ring transition. The vtkCriticalSection provides a higher-performance equivalent (on Windows) but won't work across processes. Since it is unclear how, in vtk, an object at the vtk level can be shared across processes in the first place, one should use vtkCriticalSection unless one has a very good reason to use vtkMutexLock. If higher-performance equivalents for non-Windows platforms (Irix, SunOS, etc) are discovered, they should replace the implementations in this class

Definition at line 122 of file vtkCriticalSection.h.

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Member Function Documentation

vtkCriticalSection* vtkCriticalSection::New (    )  [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on. Reimplemented from vtkObject.

virtual const char* vtkCriticalSection::GetClassName (    )  [virtual]

Return the class name as a string. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkObject.

int vtkCriticalSection::IsTypeOf (  const char *    type )  [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkObject.

virtual int vtkCriticalSection::IsA (  const char *    type )  [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkObject.

vtkCriticalSection* vtkCriticalSection::SafeDownCast (  vtkObject *    o )  [static]

Will cast the supplied object to vtkObject* is this is a safe operation (i.e., a safe downcast); otherwise NULL is returned. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkObject.

void vtkCriticalSection::PrintSelf (  ostream &    os, vtkIndent    indent )  [virtual]

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes. Reimplemented from vtkObject.

void vtkCriticalSection::Lock (  void    )  [inline]

Lock the vtkCriticalSection Definition at line 141 of file vtkCriticalSection.h.

void vtkCriticalSection::Unlock (  void    )  [inline]

Unlock the vtkCriticalSection Definition at line 146 of file vtkCriticalSection.h.

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Member Data Documentation

vtkSimpleCriticalSection vtkCriticalSection::SimpleCriticalSection [protected]

Definition at line 137 of file vtkCriticalSection.h.

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

• common/vtkCriticalSection.h

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