Memory leak in dll with an imaq-function

Question

Hi,
I am currently writing a dll which uses the imaqImageToArray function.
Of course this function allocates new memory every time it converts a picture, and as I convert 180 pics a second and the Program shopuld run for hours that is quite a problem for me.
The solution should of course be the function free(void* MyPointer). And if I use malloc to allocate some random memory, instead of the imaqImageToArray, this works perfectly.
However when I call free() to release memory allocated by the imaqImageToArray function, the dll/LabView-Program will crash.
So I wonder what function the imaq-Functions use to allocate memory and how I can get rid of it again. Is there another imaq-function?
Thanks already!
Greetings
Solved!
Go to Solution.

Answer 1

Hi,
sorry for the misunderstanding. I use the imaqImageToArray function inside the .dll. The Code Hence is a c-code.
#include "extcode.h"
#include "nivision.h"
... some stuff/the dll-function etc....
uint8_t *Pointer;
Pointer = (uint8_t)imaqImageToArray(MyImage,MyRect,&Rows,&Columns);
if(Pointer!= NULL)
     free(Pointer);
... other stuff
Sadly I can't find a detailed description of the function. I assume the void* Pointer returned by imaqImageToArray points to an Array, however I am not sure wether it points to a usual c-array or a LabView Array, meaning:
typedef struct {
    int32_t dimSize;
    double Element[1];
    } LVArray;
That would explain why free(); won't work.
I think I got a step further though, as I found a function in the "extcode.h" called    DSDisposePtr(void *p). That should be the equivalent to free() for LabView Datastructures.
However even though I have included everything from the cintools directory explicitly to the project, the Linker complains about a not found externic object. Anyone knows which .lib files I need to include where to be able to use that function?
Thanks