[Insight-developers] Multithreaded exception handling in itkConnectedComponentImageFilter

[Hans Johnson]

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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