[scilab-Users] problem with free function

[Allan CORNET]

Hi,

 

You can debug your code with Visual studio :

 

http://wiki.scilab.org/How_to_debug_an_external_source_code_linked_to_scilab
_with_Visual_Studio

 

Allan

 

De : Collewet Guylaine [mailto:guylaine.collewet at cemagref.fr] 
Envoyé : vendredi 11 février 2011 17:22
À : users at lists.scilab.org
Objet : [scilab-Users] problem with free function

 

Hello,

 

I have a problem with the “free” function which makes scilab crash

I wrote two functions “sci_imdilate” and “image_dilate”

sci_imdilate is the interface between scilab and the function image_dilate

 

the memory pointed by l_dilated_image (see the code below) is allocated by
image_dilate and I’d like to free it in sci_imdilate

 

however, a call to free makes  scilab crash

If I remove the “free”, the whole function works properly

 

I cannot undersand why

 

Does someone see my mistake ?

I am working with scilab 5.2.2  32 bits on windows 7 (64 bits machine)

 

Regards

 

Guylaine Collewet

 

 

 

/////////////////////////

// function sci_imdilate

///////////////////////

 

double *l_dilated_image;

 


/


 

dilate_image(&l_image[0], m_image, n_image, &l_kernel[0], m_kernel,
n_kernel, &l_dilated_image, &l_mask[0], &ierr);

 

createMatrixOfDouble(pvApiCtx, 4, m_image, n_image, l_dilated_image);

 

if(l_dilated_image) {

       free(l_dilated_image);

               }

 

 

 

/////////////////////////

// function dilate_image

/////////////////////////

 

 

int dilate_image(double *image, int width, int height, double *kernel,  int
kernel_width, int kernel_height, double **dilated_image, double *mask, int
*ierr)

{

 


/


 

               if (!(*dilated_image = (double*)calloc(1,
sizeof(double)*width*height)))

               {

                              *ierr=1;

                              return(-1);

               }

 

 


/


 

 

}

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