3 * Stefano Zacchiroli <zack@cs.unibo.it>
4 * for the HELM Team http://helm.cs.unibo.it/
6 * This file is part of HELM, an Hypertextual, Electronic
7 * Library of Mathematics, developed at the Computer Science
8 * Department, University of Bologna, Italy.
10 * HELM is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * HELM is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with HELM; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
25 * For details, see the HELM World-Wide-Web page,
26 * http://helm.cs.unibo.it/
34 let broker_url = "localhost:49081/act";;
35 let dump_environment_on_exit = false;;
37 let init_tutor = Hbugs_id_generator.new_tutor_id;;
39 (** register a tutor to broker *)
40 let register_to_broker id url hint_type dsc =
43 Hbugs_messages.submit_req
44 ~url:broker_url (Register_tutor (id, url, hint_type, dsc))
47 | Tutor_registered id ->
48 prerr_endline (sprintf "Tutor registered, broker id: %s" id);
51 raise (Hbugs_messages.Unexpected_message unexpected_msg))
53 failwith (sprintf "Can't register tutor to broker: uncaught exception: %s"
54 (Printexc.to_string e))
56 (** unregister a tutor from the broker *)
57 let unregister_from_broker id =
58 let res = Hbugs_messages.submit_req ~url:broker_url (Unregister_tutor id) in
60 | Tutor_unregistered _ -> prerr_endline "Tutor unregistered!"
63 (sprintf "Can't unregister from broker, received unexpected msg: %s"
64 (Hbugs_messages.string_of_msg unexpected_msg))
67 (* typecheck a loaded proof *)
68 (* TODO this is a cut and paste from gTopLevel.ml *)
69 let typecheck_loaded_proof metasenv bo ty =
70 let module T = CicTypeChecker in
73 (fun metasenv ((_,context,ty) as conj) ->
74 ignore (T.type_of_aux' metasenv context ty) ;
77 ignore (T.type_of_aux' metasenv [] ty) ;
78 ignore (T.type_of_aux' metasenv [] bo)
81 type xml_kind = Body | Type;;
82 let mk_dtdname ~ask_dtd_to_the_getter dtd =
83 if ask_dtd_to_the_getter then
84 Helm_registry.get "getter.url" ^ "getdtd?uri=" ^ dtd
86 "http://mowgli.cs.unibo.it/dtd/" ^ dtd
88 (** this function must be the inverse function of GTopLevel.strip_xml_headings
90 let add_xml_headings ~kind s =
91 let dtdname = mk_dtdname ~ask_dtd_to_the_getter:true "cic.dtd" in
94 | Body -> "CurrentProof"
95 | Type -> "ConstantType"
97 "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n\n" ^
98 "<!DOCTYPE " ^ root ^ " SYSTEM \""^ dtdname ^ "\">\n\n" ^
102 let load_state (type_string, body_string, goal) =
104 let ((tmp1, oc1), (tmp2, oc2)) =
105 (Filename.open_temp_file "" "", Filename.open_temp_file "" "")
108 output_string oc1 (add_xml_headings ~kind:Type type_string);
109 output_string oc2 (add_xml_headings ~kind:Body body_string);
110 close_out oc1; close_out oc2;
111 prerr_endline (sprintf "Proof Type available in %s" tmp1);
112 prerr_endline (sprintf "Proof Body available in %s" tmp2);
115 (match CicParser.obj_of_xml tmp1 (Some tmp2) with
116 | Cic.CurrentProof (_,metasenv,bo,ty,_) -> (* TODO il primo argomento e' una URI valida o e' casuale? *)
118 let uri = UriManager.uri_of_string "cic:/foo.con" in
120 typecheck_loaded_proof metasenv bo ty;
122 ((uri, metasenv, bo, ty), goal)
126 Sys.remove tmp1; Sys.remove tmp2;
129 (* tutors creation stuff from now on *)
131 module type HbugsTutor =
133 val start: unit -> unit
136 module type HbugsTutorDescription =
140 val tactic: ProofEngineTypes.tactic
142 val hint_type: hint_type
143 val description: string
144 val environment_file: string
147 module BuildTutor (Dsc: HbugsTutorDescription) : HbugsTutor =
149 let broker_id = ref None
150 let my_own_id = init_tutor ()
151 let my_own_addr, my_own_port = Dsc.addr, Dsc.port
152 let my_own_url = sprintf "%s:%d" my_own_addr my_own_port
154 let is_authenticated id =
155 match !broker_id with
157 | Some broker_id -> id = broker_id
159 (* thread who do the dirty work *)
160 let slave (state, musing_id) =
161 prerr_endline (sprintf "Hi, I'm the slave for musing %s" musing_id);
162 let (proof, goal) = load_state state in
165 ignore (Dsc.tactic (proof, goal));
171 (my_own_id, musing_id, (if success then Eureka Dsc.hint else Sorry))
173 ignore (Hbugs_messages.submit_req ~url:broker_url answer);
175 (sprintf "Bye, I've completed my duties (success = %b)" success)
178 (* hashtbl mapping musings ids to PID of threads doing the related (dirty)
180 let slaves = Hashtbl.create 17 in
182 prerr_endline "ignoring request from unauthorized broker";
183 Exception ("forbidden", "")
185 function (* _the_ callback *)
186 | Start_musing (broker_id, state) ->
187 if is_authenticated broker_id then begin
188 prerr_endline "received Start_musing";
189 let new_musing_id = Hbugs_id_generator.new_musing_id () in
191 (sprintf "starting a new musing (id = %s)" new_musing_id);
192 (* let slave_thread = Thread.create slave (state, new_musing_id) in *)
194 ExtThread.create slave (state, new_musing_id)
196 Hashtbl.add slaves new_musing_id slave_thread;
197 Musing_started (my_own_id, new_musing_id)
198 end else (* broker unauthorized *)
200 | Abort_musing (broker_id, musing_id) ->
201 if is_authenticated broker_id then begin
202 (try (* kill thread responsible for "musing_id" *)
203 let slave_thread = Hashtbl.find slaves musing_id in
204 ExtThread.kill slave_thread;
205 Hashtbl.remove slaves musing_id
207 | ExtThread.Can_t_kill (_, reason) ->
208 prerr_endline (sprintf "Unable to kill slave: %s" reason)
210 prerr_endline (sprintf
211 "Can't find slave corresponding to musing %s, can't kill it"
213 Musing_aborted (my_own_id, musing_id)
214 end else (* broker unauthorized *)
217 Exception ("unexpected_msg",
218 Hbugs_messages.string_of_msg unexpected_msg)
220 let callback (req: Http_types.request) outchan =
222 let req_msg = Hbugs_messages.msg_of_string req#body in
223 let answer = hbugs_callback req_msg in
224 Http_daemon.respond ~body:(Hbugs_messages.string_of_msg answer) outchan
225 with Hbugs_messages.Parse_error (subj, reason) ->
227 ~body:(Hbugs_messages.string_of_msg
228 (Exception ("parse_error", reason)))
231 let restore_environment () =
232 let ic = open_in Dsc.environment_file in
233 prerr_endline "Restoring environment ...";
234 CicEnvironment.restore_from_channel
235 ~callback:(fun uri -> prerr_endline uri) ic;
236 prerr_endline "... done!";
239 let dump_environment () =
240 let oc = open_out Dsc.environment_file in
241 prerr_endline "Dumping environment ...";
242 CicEnvironment.dump_to_channel
243 ~callback:(fun uri -> prerr_endline uri) oc;
244 prerr_endline "... done!";
249 Sys.catch_break true;
251 if dump_environment_on_exit then
253 unregister_from_broker my_own_id);
255 Some (register_to_broker
256 my_own_id my_own_url Dsc.hint_type Dsc.description);
257 if Sys.file_exists Dsc.environment_file then
258 restore_environment ();
260 ~addr:my_own_addr ~port:my_own_port ~mode:`Thread callback
261 with Sys.Break -> () (* exit nicely, invoking at_exit functions *)