Re: [Caml-list] wrapping external classes

[Alain Frisch <alain@frisch.fr>]

Mauricio Fernandez wrote:
> class foo s n =
> object(self)
>   val handle = create s n
> 
>   method compute = compute handle
> 
>   initializer
>     (* use a destroy method explicitly if you need to make sure the destructor
>      * is called --- Gc.finalise doesn't guarantee this (e.g. the program might
>      * terminate before the finalisation function is executed) *)
>     Gc.finalise destroy handle
> end

If the handle is really an OCaml integer, it is not possible to attach a 
finalizer to it. The finalizer could be attached to the object that 
wraps the handle; but the best solution is to use custom blocks and C 
finalizers in the C binding.

-- Alain