NAME

       Callback - Registering OCaml values with the C runtime.

Module

       Module   Callback

Documentation

       Module Callback
        : sig end

       Registering OCaml values with the C runtime.

       This module allows OCaml values to be registered with the C runtime under a symbolic name,
       so that C code can later call back registered OCaml functions, or raise  registered  OCaml
       exceptions.

       val register : string -> 'a -> unit

       Callback.register n v registers the value v under the name n . C code can later retrieve a
       handle to v by calling caml_named_value(n) .

       val register_exception : string -> exn -> unit

       Callback.register_exception n exn registers the exception contained in the exception value
       exn  under  the  name  n  . C code can later retrieve a handle to the exception by calling
       caml_named_value(n) . The exception value thus obtained is suitable for passing  as  first
       argument to raise_constant or raise_with_arg .