[Insight-users] Exception thrown when trying to abort itk::GridImageSource with ITK4

[Rajon,Didier Alain]

Hello,

When I try to abort the execution of the filter itk::GridImageSource, the filter generates an exception which is NOT an itk::ProcessAbort (as it should be).
Note that if, instead, I use itk::GaussianImageSource, it works fine: the abort generates an itk::ProcessAbort exception.
These 2 filters are both subclasses of itk::GenerateImageSource. The difference is that itk::GaussianImageSource is not multi-threaded (it overloads GenerateData()) whereas itk::GridImageSource is multi-threaded (it overloads (ThreadedGenerateData()). Is there any issue with aborting multi-threaded filters? Note that I used to do the same with ITK3 and it has always worked fine.

I have attached a short C++ program that reproduces the issue. The program sets an observer (an itk::CStyleCommand) on the Progress event of the filter. The callback function aborts the filter when the progress reaches 10%. This scheme is reproduced for both an itk::GaussianImageSource and an itk::GridImageSource. Running the program will show the different behaviors of the two filters: the itk::ProcessAbort is caught properly when using itk::GaussianImageSource whereas it is not when using itk::GridImageSource.

I am using ITK-4.2.1 under Linux

Thanks,

Didier.



Didier Rajon 
Neurosurgery Department
University of Florida
L2-100 MBI
PO Box 100265
Gainesville, FL, 32610
USA
Tel (1) 352 273 6987
Fax (1) 352 392 8413

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