[Insight-users] Race condition in Write ?

[Emma Ryan]

Hello All,

  Here's a simple program to test the read/write classes in ITK.  It works fine 
in Release mode (windows 7, VS 2008), but fails in Debug mode with read Access 
violation.
I did not using cmake for thhis program, but externally linked it to ITK libs. I 
suspect that the writer is experiencing a race condition. since I am not 
familiar with the internals of ITK (multi-threading etc...), I would appreciate 
if some one knowledgeable of ITK tries out the following program. 


Thank you,
Emma



#include "itkBinaryThresholdImageFilter.h"

#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"

int main( int argc, char * argv[] )
{
  if( argc < 7 )
    {
    std::cerr << "Usage: " << argv[0];
    std::cerr << " inputImageFile outputImageFile ";  
    std::cerr << " lowerThreshold upperThreshold ";  
    std::cerr << " outsideValue insideValue   "  << std::endl;  
    return EXIT_FAILURE;
    }
  
 
  typedef  unsigned char  InputPixelType;
  typedef  unsigned char  OutputPixelType;
  
  typedef itk::Image< InputPixelType,  2 >   InputImageType;
  typedef itk::Image< OutputPixelType, 2 >   OutputImageType;
 
  typedef itk::BinaryThresholdImageFilter<
               InputImageType, OutputImageType >  FilterType;
 
  typedef itk::ImageFileReader< InputImageType >  ReaderType;
  
  typedef itk::ImageFileWriter< OutputImageType >  WriterType;
  
  ReaderType::Pointer reader = ReaderType::New();
  FilterType::Pointer filter = FilterType::New();

  WriterType::Pointer writer = WriterType::New();
  writer->SetInput( filter->GetOutput() );
  reader->SetFileName( argv[1] );
 
  filter->SetInput( reader->GetOutput() );

  const OutputPixelType outsideValue = atoi( argv[5] );
  const OutputPixelType insideValue  = atoi( argv[6] );

  filter->SetOutsideValue( outsideValue );
  filter->SetInsideValue(  insideValue  );
 

  const InputPixelType lowerThreshold = atoi( argv[3] );
  const InputPixelType upperThreshold = atoi( argv[4] );

  filter->SetLowerThreshold( lowerThreshold );
  filter->SetUpperThreshold( upperThreshold );
 
  filter->Update();
  writer->SetFileName( argv[2] );
  writer->Update();

  return EXIT_SUCCESS;
}


      
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