--- /dev/null
+(******************************************************************************)
+(* *)
+(* PROJECT HELM *)
+(* *)
+(* Claudio Sacerdoti Coen <sacerdot@cs.unibo.it> *)
+(* 24/01/2000 *)
+(* *)
+(* This module implements a trival cache system (an hash-table) for cic *)
+(* objects. Uses the getter (getter.ml) and the parser (cicParser.ml) *)
+(* *)
+(******************************************************************************)
+
+let raise e = print_endline "***" ; flush stdout ; print_endline (Printexc.to_string e) ; flush stdout ; raise e;;
+
+(*CSC: forse i due seguenti tipi sono da unificare? *)
+type cooked_obj =
+ Cooked of Cic.obj
+ | Frozen of Cic.obj
+ | Unchecked of Cic.obj
+type type_checked_obj =
+ CheckedObj of Cic.obj (* cooked obj *)
+ | UncheckedObj of Cic.obj (* uncooked obj *)
+;;
+
+exception NoFunctionProvided;;
+
+(* CSC: da sostituire con un (...) option ref *)
+let cook_obj = ref (fun obj uri -> raise NoFunctionProvided);;
+
+exception CircularDependency of string;;
+exception CouldNotUnfreeze of string;;
+exception Impossible;;
+exception UncookedObj;;
+
+module HashedType =
+ struct
+ type t = UriManager.uri * int (* uri, livello di cottura *)
+ let equal (u1,n1) (u2,n2) = UriManager.eq u1 u2 && n1 = n2
+ let hash = Hashtbl.hash
+ end
+;;
+
+(* Hashtable that uses == instead of = for testing equality *)
+module HashTable = Hashtbl.Make(HashedType);;
+
+let hashtable = HashTable.create 271;;
+
+(* n is the number of time that the object must be cooked *)
+let get_obj_and_type_checking_info uri n =
+ try
+ HashTable.find hashtable (uri,n)
+ with
+ Not_found ->
+ try
+ match HashTable.find hashtable (uri,0) with
+ Cooked _
+ | Frozen _ -> raise Impossible
+ | Unchecked _ as t -> t
+ with
+ Not_found ->
+ let filename = Getter.get uri in
+ let (annobj,_) = CicParser.term_of_xml filename uri false in
+ let obj = Deannotate.deannotate_obj annobj in
+ let output = Unchecked obj in
+ HashTable.add hashtable (uri,0) output ;
+ output
+;;
+
+(* DANGEROUS!!! *)
+(* USEFUL ONLY DURING THE FIXING OF THE FILES *)
+(* change_obj uri (Some newobj) *)
+(* maps uri to newobj in cache. *)
+(* change_obj uri None *)
+(* maps uri to a freeze dummy-object. *)
+let change_obj uri newobj =
+ let newobj =
+ match newobj with
+ Some newobj' -> Unchecked newobj'
+ | None -> Frozen (Cic.Variable ("frozen-dummy", Cic.Implicit))
+ in
+ HashTable.remove hashtable (uri,0) ;
+ HashTable.add hashtable (uri,0) newobj
+;;
+
+let is_annotation_uri uri =
+ Str.string_match (Str.regexp ".*\.ann$") (UriManager.string_of_uri uri) 0
+;;
+
+(* returns both the annotated and deannotated uncooked forms (plus the *)
+(* map from ids to annotation targets) *)
+let get_annobj_and_type_checking_info uri =
+ let filename = Getter.get uri in
+ match CicParser.term_of_xml filename uri true with
+ (_, None) -> raise Impossible
+ | (annobj, Some ids_to_targets) ->
+ (* If uri is the uri of an annotation, let's use the annotation file *)
+ if is_annotation_uri uri then
+ AnnotationParser.annotate (Getter.get_ann uri) ids_to_targets ;
+ try
+ (annobj, ids_to_targets, HashTable.find hashtable (uri,0))
+ with
+ Not_found ->
+ let obj = Deannotate.deannotate_obj annobj in
+ let output = Unchecked obj in
+ HashTable.add hashtable (uri,0) output ;
+ (annobj, ids_to_targets, output)
+;;
+
+
+(* get_obj uri *)
+(* returns the cic object whose uri is uri. If the term is not just in cache, *)
+(* then it is parsed via CicParser.term_of_xml from the file whose name is *)
+(* the result of Getter.get uri *)
+let get_obj uri =
+ match get_obj_and_type_checking_info uri 0 with
+ Unchecked obj -> obj
+ | Frozen obj -> obj
+ | Cooked obj -> obj
+;;
+
+(* get_annobj uri *)
+(* returns the cic object whose uri is uri either in annotated and *)
+(* deannotated form. The term is put into the cache if it's not there yet. *)
+let get_annobj uri =
+ let (ann, ids_to_targets, deann) = get_annobj_and_type_checking_info uri in
+ let deannobj =
+ match deann with
+ Unchecked obj -> obj
+ | Frozen _ -> raise (CircularDependency (UriManager.string_of_uri uri))
+ | Cooked obj -> obj
+ in
+ (ann, ids_to_targets, deannobj)
+;;
+
+(*CSC Commento falso *)
+(* get_obj uri *)
+(* returns the cooked cic object whose uri is uri. The term must be present *)
+(* and cooked in cache *)
+let rec get_cooked_obj uri cookingsno =
+ match get_obj_and_type_checking_info uri cookingsno with
+ Unchecked _
+ | Frozen _ -> raise UncookedObj
+ | Cooked obj -> obj
+;;
+
+(* is_type_checked uri *)
+(* CSC: commento falso ed obsoleto *)
+(* returns true if the term has been type-checked *)
+(* otherwise it returns false and freeze the term for type-checking *)
+(* set_type_checking_info must be called to unfreeze the term *)
+let is_type_checked uri cookingsno =
+ match get_obj_and_type_checking_info uri cookingsno with
+ Cooked obj -> CheckedObj obj
+ | Unchecked obj ->
+ HashTable.remove hashtable (uri,0) ;
+ HashTable.add hashtable (uri,0) (Frozen obj) ;
+ UncheckedObj obj
+ | Frozen _ -> raise (CircularDependency (UriManager.string_of_uri uri))
+;;
+
+(* set_type_checking_info uri *)
+(* must be called once the type-checking of uri is finished *)
+(* The object whose uri is uri is unfreezed *)
+let set_type_checking_info uri =
+ match HashTable.find hashtable (uri,0) with
+ Frozen obj ->
+ (* let's cook the object at every level *)
+ HashTable.remove hashtable (uri,0) ;
+ let obj' = CicSubstitution.undebrujin_inductive_def uri obj in
+ HashTable.add hashtable (uri,0) (Cooked obj') ;
+ let cooked_objs = !cook_obj obj' uri in
+ let last_cooked_level = ref 0 in
+ let last_cooked_obj = ref obj' in
+ List.iter
+ (fun (n,cobj) ->
+ for i = !last_cooked_level + 1 to n do
+ HashTable.add hashtable (uri,i) (Cooked !last_cooked_obj)
+ done ;
+ HashTable.add hashtable (uri,n + 1) (Cooked cobj) ;
+ last_cooked_level := n + 1 ;
+ last_cooked_obj := cobj
+ ) cooked_objs ;
+ for i = !last_cooked_level + 1 to UriManager.depth_of_uri uri + 1 do
+ HashTable.add hashtable (uri,i) (Cooked !last_cooked_obj)
+ done
+ | _ -> raise (CouldNotUnfreeze (UriManager.string_of_uri uri))
+;;
projects / helm.git / blobdiff