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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open System
type state = Lib.frozen * Summary.frozen
let freeze () =
(Lib.freeze(), Summary.freeze_summaries())
let unfreeze (fl,fs) =
Lib.unfreeze fl;
Summary.unfreeze_summaries fs
let (extern_state,intern_state) =
let (raw_extern, raw_intern) =
extern_intern Coq_config.state_magic_number ".coq" in
(fun s ->
if !Flags.load_proofs <> Flags.Force then
Util.error "Write State only works with option -force-load-proofs";
raw_extern s (freeze())),
(fun s ->
unfreeze
(with_magic_number_check (raw_intern (Library.get_load_paths ())) s);
Library.overwrite_library_filenames s)
(* Rollback. *)
let with_heavy_rollback f h x =
let st = freeze () in
try
f x
with reraise ->
let e = h reraise in (unfreeze st; raise e)
let with_state_protection f x =
let st = freeze () in
try
let a = f x in unfreeze st; a
with reraise ->
(unfreeze st; raise reraise)
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