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authorGravatar Samuel Mimram <samuel.mimram@ens-lyon.org>2004-07-28 21:54:47 +0000
committerGravatar Samuel Mimram <samuel.mimram@ens-lyon.org>2004-07-28 21:54:47 +0000
commit6b649aba925b6f7462da07599fe67ebb12a3460e (patch)
tree43656bcaa51164548f3fa14e5b10de5ef1088574 /library/states.ml
Imported Upstream version 8.0pl1upstream/8.0pl1
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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,v 1.8.14.1 2004/07/16 19:30:36 herbelin Exp $ *)
+
+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_path ()) 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)