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(**************************************************************************)
(* *)
(* This file is part of WP plug-in of Frama-C. *)
(* *)
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(* CEA (Commissariat a l'energie atomique et aux energies *)
(* alternatives) *)
(* *)
(* you can redistribute it and/or modify it under the terms of the GNU *)
(* Lesser General Public License as published by the Free Software *)
(* Foundation, version 2.1. *)
(* *)
(* It is distributed in the hope that it will be useful, *)
(* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *)
(* GNU Lesser General Public License for more details. *)
(* *)
(* See the GNU Lesser General Public License version 2.1 *)
(* for more details (enclosed in the file licenses/LGPLv2.1). *)
(* *)
(**************************************************************************)
(* -------------------------------------------------------------------------- *)
(* --- Location --- *)
(* -------------------------------------------------------------------------- *)
let with_current_loc loc phi x =
let tmp = Cil_const.CurrentLoc.get () in
try
Cil_const.CurrentLoc.set loc ;
let y = phi x in
Cil_const.CurrentLoc.set tmp ; y
with error ->
Cil_const.CurrentLoc.set tmp ; raise error
(* -------------------------------------------------------------------------- *)
(* --- Local Context --- *)
(* -------------------------------------------------------------------------- *)
type 'a value = {
name : string ; (* Descriptive *)
mutable current : 'a option ;
}
let create ?default name = { name = name ; current = default }
let name s = s.name
let defined env = match env.current with None -> false | Some _ -> true
let get env =
match env.current with
| Some e -> e
| None -> Wp_parameters.fatal "Context '%s' non-initialized." env.name
let get_opt env = env.current
let set env s =
env.current <- Some s
let clear env =
env.current <- None
let update env f =
match env.current with
| Some e -> env.current <- Some (f e)
| None -> Wp_parameters.fatal "Context '%s' non-initialized." env.name
let bind_with env w f e =
let tmp = env.current in env.current <- w ;
try let e = f e in env.current <- tmp ; e
with error -> env.current <- tmp ; raise error
let bind env s f e = bind_with env (Some s) f e
let free env f e = bind_with env None f e
let push env x = let old = env.current in env.current <- Some x ; old
let pop env old = env.current <- old
let demon = ref []
let register f = demon := !demon @ [f]
let configure =
let closure,state =
State_builder.apply_once "Wp.Context.configure" [ Ast.self ]
(fun () -> List.iter (fun f -> f ()) !demon)
in
ignore state ; closure
(* -------------------------------------------------------------------------- *)