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CentOS 7.0 - man page for callback (centos section 3)

Callback(3)				  OCaml library 			      Callback(3)

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 .

OCamldoc				    2014-06-09				      Callback(3)


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