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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(** {6 States of the system} *)
(** In that module, we provide functions to get
and set the state of the whole system. Internally, it is done by
freezing the states of both [Lib] and [Summary]. We provide functions
to write and restore state to and from a given file. *)
val intern_state : string -> unit
val extern_state : string -> unit
type state
val freeze : marshallable:bool -> state
val unfreeze : state -> unit
(** {6 Rollback } *)
(** [with_heavy_rollback f h x] applies [f] to [x]. If this application
ends on an exception, the wrapper [h] is applied to it, then
the state of the whole system is restored as it was before applying [f],
and finally the exception produced by [h] is raised. *)
val with_heavy_rollback : ('a -> 'b) -> (exn -> exn) -> 'a -> 'b
(** [without_rollback] is just like [with_heavy_rollback], except that
no state is restored in case of exception. *)
val without_rollback : ('a -> 'b) -> (exn -> exn) -> 'a -> 'b
(** [with_state_protection f x] applies [f] to [x] and restores the
state of the whole system as it was before applying [f] *)
val with_state_protection : ('a -> 'b) -> 'a -> 'b
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