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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id: states.ml 6692 2005-02-06 13:03:51Z herbelin $ *)
open System
type state = Lib.frozen * Summary.frozen
let get_state () =
(Lib.freeze(), Summary.freeze_summaries())
let set_state (fl,fs) =
Lib.unfreeze fl;
Summary.unfreeze_summaries fs
let state_magic_number = 19764
let (extern_state,intern_state) =
let (raw_extern, raw_intern) = extern_intern state_magic_number ".coq" in
(fun s -> raw_extern s (get_state())),
(fun s -> set_state (raw_intern (Library.get_load_paths ()) s))
(* Rollback. *)
let freeze = get_state
let unfreeze = set_state
let with_heavy_rollback f x =
let st = get_state () in
try
f x
with reraise ->
(set_state st; raise reraise)
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