I did a wrapping of the levmar library.

 

The approach I chose is to allocate bigarrays from Caml, and pass them to the main C function, along with the function f.

In the main function, I register f and all the bigarrays as global roots, and then call as many times the c sub function to compute the minimization.

 

Feel free to ask for more precisions if needed

Hope this helps.

 

Rabih

 

________________________________

De : caml-list-bounces@yquem.inria.fr [mailto:caml-list-bounces@yquem.inria.fr] De la part de Matthieu Dubuget
Envoyé : jeudi 31 mai 2007 13:43
À : caml-list@inria.fr
Objet : Re: [Caml-list] nonlinear fit function binding

 

Well. It seems my former message was unclear?

Here is a more precise question: should/could C allocated bigarrays
 be freed?

Context:

OCaml calls one C function M, at about 50 Hz.                                  
In M,  a C function (let's call it A) is locally defined.
One pointer to A is given to another function, that
calls A more than once.

Function A wraps a C array it receives as a parameter
into a bigarray, and give it to OCaml through one callback. 

The whole process is repeated, at about 50 Hz.

I do not know if the bigarrays allocated by M are garbage
collected in any way, and if they are not, how I could free
them in order to avoid any memory leak? 

Thanks in advance
Salutations

Matthieu

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