[Insight-developers] Multithreaded exception handling in itkConnectedComponentImageFilter

[Gaëtan Lehmann]

Hi Hans,

I've made the multithreaded part - I guess I've missed a case.
I'll look at it soon.

Gaëtan



Le 3 avr. 09 à 23:08, Hans Johnson a écrit :

> All,
>
> Sorry to complain, and not provide a fix.  But here is the  
> situation, I have a program that uses the  
> itkConnectedComponentImageFilter, and when I set  
> ITK_GLOBAL_DEFAULT_NUMBER_OF_THREADS=1,  the exception at line 345  
> is of src/include/InsightToolkit/BasicFilters/ 
> itkConnectedComponentImageFilter.txx  is thrown (proper behavior)
>
> When ITK_GLOBAL_DEFAULT_NUMBER_OF_THREADS=8;  the same code enters  
> into an infinite loop that never exits.
>
>     336   if( threadId == 0 )
>     337     {
>     338     unsigned long int totalLabs = CreateConsecutive();
>     339     m_ObjectCount = totalLabs;
>     340     // check for overflow exception here
>     341     if( totalLabs > static_cast<unsigned long int>(
>     342             NumericTraits<OutputPixelType>::max() ) )
>     343       {
>     344       itkExceptionMacro(
>     345         << "Number of objects greater than maximum of output  
> pixel type " );
>     346       }
>     347     }
>     348   this->Wait();
>     349
>
> I was wondering what the correct behavior is supposed to be in a  
> case like this.
>
> http://public.kitware.com/Bug/view.php?id=8839
>
>
> Thanks,
> Hans
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-- 
Gaëtan Lehmann
Biologie du Développement et de la Reproduction
INRA de Jouy-en-Josas (France)
tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
http://voxel.jouy.inra.fr  http://www.mandriva.org
http://www.itk.org  http://www.clavier-dvorak.org

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