EXPERIMENTAL COMMIT (by CSC,actuall :-)

[helm.git] / helm / software / components / ng_kernel / nCicLibrary.ml

diff --git a/helm/software/components/ng_kernel/nCicLibrary.ml b/helm/software/components/ng_kernel/nCicLibrary.ml
index e2d800157dd4d57c4f44852dd6735b6dfc6ebd0e..8c988de2f52b8f4d144051b8a2e7975aa96d5ec9 100644 (file)
--- a/helm/software/components/ng_kernel/nCicLibrary.ml
+++ b/helm/software/components/ng_kernel/nCicLibrary.ml
@@ -12,10 +12,19 @@
 (* $Id$ *)
 
 exception ObjectNotFound of string Lazy.t
+exception LibraryOutOfSync of string Lazy.t
 
-let storage = ref [];;
+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 resolve name =
  try
@@ -63,28 +72,56 @@ let add_obj u obj =
               (NReference.Ind (inductive,i,leftno))]
          ) il)
   in
-   aliases := references @ !aliases
+  aliases := references @ !aliases;
+  !storage,!aliases,!cache
 ;;
 
-let cache = NUri.UriHash.create 313;;
-
 let get_obj u =
  try List.assq u !storage
  with Not_found ->
-  try NUri.UriHash.find cache u
+  try NUri.UriMap.find u !cache
   with Not_found ->
     (* in the final implementation should get it from disk *)
     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) -> 
-  (*       prerr_endline ("+"^NUri.string_of_uri u);  *)
-        NUri.UriHash.add cache u o) l;
+      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 () = NUri.UriHash.clear cache;;
+let clear_cache () = cache := NUri.UriMap.empty;;
+
+let magic = 0;;
+
+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 serialize ~baseuri dump =
+ let ch = open_out (path_of_baseuri baseuri) in
+ Marshal.to_channel ch (magic,dump) [Marshal.Closures];
+ close_out ch
+;;
+
+let require ~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 decompile ~baseuri =
+ Unix.unlink (path_of_baseuri baseuri)
+;;