how to call an OCaml library from C/C++ ?

how to call an OCaml library from C/C++ ?

[Yoann Padioleau]

Hi,

Is there a way to call OCaml library from a C/C++ program without the C++ program
knowing it's OCaml code ? I mean I can not touch the main of the C++ program
so it has to be completely transparent and it would be good if each call to the ocaml library
once finished free all the memory it was using.
Can we call  caml_startup() multiple times ? is there a caml_cleanup ?

Ideally I would like from C/C++ to have:


my_extension.c:
char* sanitize_stuff(char *s) {

  caml_startup();
  char * res = <call_ocaml_code_with_s>;
  caml_cleanup();
  return res;
}

and then link my c++ program with my_extension.o  and some .a containing ocaml code.

Re: [Caml-list] how to call an OCaml library from C/C++ ?

[Yoann Padioleau]

On Aug 24, 2010, at 10:50 AM, Yoann Padioleau wrote:

> 
> Hi,
> 
> Is there a way to call OCaml library from a C/C++ program without the C++ program
> knowing it's OCaml code ? I mean I can not touch the main of the C++ program
> so it has to be completely transparent and it would be good if each call to the ocaml library
> once finished free all the memory it was using.
> Can we call  caml_startup() multiple times ? is there a caml_cleanup ?
> 
> Ideally I would like from C/C++ to have:
> 
> 
> my_extension.c:
> char* sanitize_stuff(char *s) {
> 
>  caml_startup();
>  char * res = <call_ocaml_code_with_s>;
>  caml_cleanup();
>  return res;
> }

Also it is possible to have multiple independent ocaml runtime at the same time 
so such a function is thread-safe ?


> 
> and then link my c++ program with my_extension.o  and some .a containing ocaml code.
> 
> 
> 
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