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(* $Id$ *)
open Util
open Names
type 'a object_declaration = {
load_function : 'a -> unit;
cache_function : section_path * 'a -> unit;
specification_function : 'a -> 'a }
type obj = Dyn.t (* persistent dynamic objects *)
type dynamic_object_declaration = {
dyn_load_function : obj -> unit;
dyn_cache_function : section_path * obj -> unit;
dyn_specification_function : obj -> obj }
let object_tag lobj = Dyn.tag lobj
let cache_tab =
(Hashtbl.create 17 : (string,dynamic_object_declaration) Hashtbl.t)
let declare_object (na,odecl) =
let (infun,outfun) = Dyn.create na in
let loader lobj =
if Dyn.tag lobj = na then odecl.load_function (outfun lobj)
else anomaly "somehow we got the wrong dynamic object in the loadfun"
and cacher (spopt,lobj) =
if Dyn.tag lobj = na then odecl.cache_function(spopt,outfun lobj)
else anomaly "somehow we got the wrong dynamic object in the cachefun"
and spec_extractor lobj =
infun(odecl.specification_function (outfun lobj))
in
Hashtbl.add cache_tab na { dyn_load_function = loader;
dyn_cache_function = cacher;
dyn_specification_function = spec_extractor };
(infun,outfun)
let load_object lobj =
let tag = object_tag lobj in
try
let dodecl = Hashtbl.find cache_tab tag in
dodecl.dyn_load_function lobj
with Not_found ->
anomaly ("Cannot find loadfun for an object with tag "^tag)
let cache_object (spopt,lobj) =
let tag = object_tag lobj in
try
let dodecl = Hashtbl.find cache_tab tag in
dodecl.dyn_cache_function(spopt,lobj)
with Not_found ->
anomaly ("Cannot find cachefun for an object with tag "^tag)
let extract_object_specification lobj =
let tag = object_tag lobj in
try
let dodecl = Hashtbl.find cache_tab tag in
dodecl.dyn_specification_function lobj
with Not_found ->
anomaly ("Cannot find specification extractor for an object with tag "^tag)
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