61 lines
2.3 KiB
OCaml
61 lines
2.3 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 2004 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the GNU Library General Public License, with *)
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(* the special exception on linking described in file ../LICENSE. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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type shape =
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| Function
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| Lazy
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| Class
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| Module of shape array
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let rec init_mod loc shape =
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match shape with
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| Function ->
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let pad1 = 1 and pad2 = 2 and pad3 = 3 and pad4 = 4
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and pad5 = 5 and pad6 = 6 and pad7 = 7 and pad8 = 8 in
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Obj.repr(fun _ ->
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ignore pad1; ignore pad2; ignore pad3; ignore pad4;
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ignore pad5; ignore pad6; ignore pad7; ignore pad8;
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raise (Undefined_recursive_module loc))
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| Lazy ->
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Obj.repr (lazy (raise (Undefined_recursive_module loc)))
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| Class ->
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Obj.repr (CamlinternalOO.dummy_class loc)
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| Module comps ->
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Obj.repr (Array.map (init_mod loc) comps)
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let overwrite o n =
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assert (Obj.size o >= Obj.size n);
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for i = 0 to Obj.size n - 1 do
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Obj.set_field o i (Obj.field n i)
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done
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let rec update_mod shape o n =
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match shape with
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| Function ->
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if Obj.tag n = Obj.closure_tag && Obj.size n <= Obj.size o
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then begin overwrite o n; Obj.truncate o (Obj.size n) (* PR #4008 *) end
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else overwrite o (Obj.repr (fun x -> (Obj.obj n : _ -> _) x))
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| Lazy ->
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assert (Obj.tag n = Obj.lazy_tag);
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overwrite o n
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| Class ->
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assert (Obj.tag n = 0 && Obj.size n = 4);
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overwrite o n
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| Module comps ->
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assert (Obj.tag n = 0 && Obj.size n >= Array.length comps);
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for i = 0 to Array.length comps - 1 do
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update_mod comps.(i) (Obj.field o i) (Obj.field n i)
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done
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