\ / This software is distributed as is, NO WARRANTY.
V_______________________________________________________________ *)
+(* $Id$ *)
+
exception ObjectNotFound of string Lazy.t
+exception LibraryOutOfSync of string Lazy.t
+
+type timestamp =
+ (NUri.uri * NCic.obj) list *
+ (NUri.uri * string * NReference.reference) list *
+ NCic.obj NUri.UriMap.t;;
+
+let time0 = [],[],NUri.UriMap.empty;;
+let storage = ref [];;
+let aliases = ref [];;
+let cache = ref NUri.UriMap.empty;;
+
+let time_travel (sto,ali,cac) = storage := sto; aliases := ali; cache := cac;;
+
+let path_of_baseuri baseuri =
+ let uri = NUri.string_of_uri baseuri in
+ let path = String.sub uri 4 (String.length uri - 4) in
+ let path = Helm_registry.get "matita.basedir" ^ path in
+ let dirname = Filename.dirname path in
+ HExtlib.mkdir dirname;
+ path ^ ".ng"
+;;
+
+let magic = 0;;
+
+let require0 ~baseuri =
+ let ch = open_in (path_of_baseuri baseuri) in
+ let mmagic,dump = Marshal.from_channel ch in
+ close_in ch;
+ if mmagic <> magic then
+ raise (LibraryOutOfSync (lazy "The library is out of sync with the implementation. Please recompile the library."))
+ else
+ dump
+;;
+
+let serialize ~baseuri dump =
+ let ch = open_out (path_of_baseuri baseuri) in
+ Marshal.to_channel ch (magic,dump) [Marshal.Closures];
+ close_out ch;
+ List.iter
+ (fun (uri,obj) ->
+ let ch = open_out (path_of_baseuri uri) in
+ Marshal.to_channel ch (magic,obj) [];
+ close_out ch
+ ) !storage;
+ time_travel time0
+;;
+
+module type Serializer =
+ sig
+ type status
+ type obj
+ val register: string -> ('a -> status -> status) -> ('a -> obj)
+ val serialize: baseuri:NUri.uri -> obj list -> unit
+ val require: baseuri:NUri.uri -> status -> status
+ end
+
+module Serializer(S: sig type status end) =
+ struct
+ type status = S.status
+ type obj = Obj.t
+
+ let require1 = ref (fun _ -> assert false (* unknown data*))
+ let already_registered = ref []
-let cache = NUri.UriHash.create 313;;
+ let register tag require =
+ assert (not (List.mem tag !already_registered));
+ already_registered := tag :: !already_registered;
+ require1 :=
+ (fun (tag',data) as x ->
+ if tag=tag' then Obj.magic require data else Obj.magic !require1 x);
+ Obj.magic (fun x -> tag,x)
+
+ let serialize = serialize
+
+ let require ~baseuri status =
+ let dump = require0 ~baseuri in
+ List.fold_right (Obj.magic !require1) dump status
+end
+
+let decompile ~baseuri =
+ Unix.unlink (path_of_baseuri baseuri)
+ (* WE ARE NOT REMOVING ALL THE OBJECTS YET! *)
+;;
+
+(* the miracles of Marshal... *)
+let fetch_obj uri =
+ let obj = require0 ~baseuri:uri in
+ (* here we need to refresh the URIs! *)
+ obj
+;;
+
+let resolve name =
+ try
+ HExtlib.filter_map
+ (fun (_,name',nref) -> if name'=name then Some nref else None) !aliases
+ with
+ Not_found -> raise (ObjectNotFound (lazy name))
+;;
+
+let aliases_of uri =
+ try
+ HExtlib.filter_map
+ (fun (uri',_,nref) -> if NUri.eq uri' uri then Some nref else None) !aliases
+ with
+ Not_found -> raise (ObjectNotFound (lazy (NUri.string_of_uri uri)))
+;;
+
+let add_obj u obj =
+ storage := (u,obj)::!storage;
+ let _,height,_,_,obj = obj in
+ let references =
+ match obj with
+ NCic.Constant (_,name,None,_,_) ->
+ [u,name,NReference.reference_of_spec u NReference.Decl]
+ | NCic.Constant (_,name,Some _,_,_) ->
+ [u,name,NReference.reference_of_spec u (NReference.Def height)]
+ | NCic.Fixpoint (is_ind,fl,_) ->
+ HExtlib.list_mapi
+ (fun (_,name,recno,_,_) i ->
+ if is_ind then
+ u,name,NReference.reference_of_spec u(NReference.Fix(i,recno,height))
+ else
+ u,name,NReference.reference_of_spec u (NReference.CoFix i)) fl
+ | NCic.Inductive (inductive,leftno,il,_) ->
+ List.flatten
+ (HExtlib.list_mapi
+ (fun (_,iname,_,cl) i ->
+ HExtlib.list_mapi
+ (fun (_,cname,_) j->
+ u,cname,
+ NReference.reference_of_spec u (NReference.Con (i,j+1,leftno))
+ ) cl @
+ [u,iname,
+ NReference.reference_of_spec u
+ (NReference.Ind (inductive,i,leftno))]
+ ) il)
+ in
+ aliases := references @ !aliases;
+ !storage,!aliases,!cache
+;;
let get_obj u =
- try NUri.UriHash.find cache u
- with Not_found ->
- (* in the final implementation should get it from disk *)
- let ouri = NUri.ouri_of_nuri u in
- let o,_ = CicEnvironment.get_obj CicUniv.oblivion_ugraph ouri in
- let l = OCic2NCic.convert_obj ouri o in
- List.iter (fun (u,_,_,_,_ as o) ->
-(* prerr_endline ("+"^NUri.string_of_uri u); *)
- NUri.UriHash.add cache u o) l;
- HExtlib.list_last l
+ try List.assq u !storage
+ with Not_found ->
+ try fetch_obj u
+ with Sys_error _ ->
+ try NUri.UriMap.find u !cache
+ with Not_found ->
+ let ouri = NCic2OCic.ouri_of_nuri u in
+ try
+ let o,_ = CicEnvironment.get_obj CicUniv.oblivion_ugraph ouri in
+ let l = OCic2NCic.convert_obj ouri o in
+ List.iter (fun (u,_,_,_,_ as o) -> cache:= NUri.UriMap.add u o !cache) l;
+ HExtlib.list_last l
+ with CicEnvironment.Object_not_found u ->
+ raise (ObjectNotFound
+ (lazy (NUri.string_of_uri (OCic2NCic.nuri_of_ouri u))))
;;
+
+let clear_cache () = cache := NUri.UriMap.empty;;
projects / helm.git / blobdiff