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