vtkSMPThreadLocalObject< T > Class Template Reference

Thread local storage for VTK objects. More...

#include <vtkSMPThreadLocalObject.h>

Inheritance diagram for vtkSMPThreadLocalObject< T >:

List of all members.

Classes
class	iterator
Public Member Functions
virtual	~vtkSMPThreadLocalObject ()
	vtkSMPThreadLocalObject ()
T *&	Local ()
iterator	begin ()
iterator	end ()

---

Detailed Description

template<typename T>
class vtkSMPThreadLocalObject< T >

Thread local storage for VTK objects.

This class essentially does the same thing as vtkSMPThreadLocal with 2 additional functions:

• Local() allocates an object of the template argument type using ::New

• The destructor calls Delete() on all objects created with Local().

  Warning:

  There is absolutely no guarantee to the order in which the local objects will be stored and hence the order in which they will be traversed when using iterators. You should not even assume that two vtkSMPThreadLocal populated in the same parallel section will be populated in the same order. For example, consider the following

   vtkSMPThreadLocal<int> Foo;
   vtkSMPThreadLocal<int> Bar;
   class AFunctor
   {
      void Initialize() const
      {
        int& foo = Foo.Local();
        int& bar = Bar.Local();
        foo = random();
        bar = foo;
      }
  
      @warning
      void operator()(vtkIdType, vtkIdType)
      {}
      void Finalize()
      {}
   };
  
      @warning
   AFunctor functor;
   vtkSMPTools::For(0, 100000, functor);
  
      @warning
   vtkSMPThreadLocal<int>::iterator itr1 = Foo.begin();
   vtkSMPThreadLocal<int>::iterator itr2 = Bar.begin();
   while (itr1 != Foo.end())
   {
     assert(*itr1 == *itr2);
     ++itr1; ++itr2;
   }

  It is possible and likely that the assert() will fail using the TBB backend. So if you need to store values related to each other and iterate over them together, use a struct or class to group them together and use a thread local of that class.

  See also:

  vtkSMPThreadLocal

  Tests:

  vtkSMPThreadLocalObject (Tests)

Definition at line 82 of file vtkSMPThreadLocalObject.h.

---

Constructor & Destructor Documentation

template<typename T>

vtkSMPThreadLocalObject< T >::vtkSMPThreadLocalObject

(

)

[inline]

Default constructor.

Definition at line 95 of file vtkSMPThreadLocalObject.h.

template<typename T>

virtual vtkSMPThreadLocalObject< T >::~vtkSMPThreadLocalObject

(

)

[inline, virtual]

Definition at line 100 of file vtkSMPThreadLocalObject.h.

---

Member Function Documentation

template<typename T>

T*& vtkSMPThreadLocalObject< T >::Local

(

)

[inline]

Returns an object local to the current thread. This object is allocated with ::New() and will be deleted in the destructor of vtkSMPThreadLocalObject.

Definition at line 117 of file vtkSMPThreadLocalObject.h.

template<typename T>

iterator vtkSMPThreadLocalObject< T >::begin

(

)

[inline]

Definition at line 158 of file vtkSMPThreadLocalObject.h.

template<typename T>

iterator vtkSMPThreadLocalObject< T >::end

(

)

[inline]

Definition at line 165 of file vtkSMPThreadLocalObject.h.

---

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

• dox/Common/Core/vtkSMPThreadLocalObject.h