maintain explicit execution frontier: avoid conflict with former task via static dependency;
start execution immediate after assignment, to keep frontier simple;
1 (* Title: Pure/PIDE/command.ML
4 Prover command execution: read -- eval -- print.
9 val read: (unit -> theory) -> Token.T list -> Toplevel.transition
11 val eval_eq: eval * eval -> bool
12 val eval_finished: eval -> bool
13 val eval_result_state: eval -> Toplevel.state
14 val eval: (unit -> theory) -> Token.T list -> eval -> eval
16 val print: bool -> string -> eval -> print list -> print list option
17 type print_fn = Toplevel.transition -> Toplevel.state -> unit
18 val print_function: string ->
19 ({command_name: string} ->
20 {delay: Time.time option, pri: int, persistent: bool, print_fn: print_fn} option) -> unit
21 val no_print_function: string -> unit
22 type exec = eval * print list
24 val exec_ids: exec option -> Document_ID.exec list
25 val exec: Document_ID.execution -> exec -> unit
28 structure Command: COMMAND =
31 (** memo results -- including physical interrupts **)
34 Expr of Document_ID.exec * (unit -> 'a) |
35 Result of 'a Exn.result;
37 abstype 'a memo = Memo of 'a expr Synchronized.var
40 fun memo exec_id e = Memo (Synchronized.var "Command.memo" (Expr (exec_id, e)));
41 fun memo_value a = Memo (Synchronized.var "Command.memo" (Result (Exn.Res a)));
43 fun memo_result (Memo v) =
44 (case Synchronized.value v of
45 Expr (exec_id, _) => error ("Unfinished execution result: " ^ Document_ID.print exec_id)
46 | Result res => Exn.release res);
48 fun memo_finished (Memo v) =
49 (case Synchronized.value v of
51 | Result res => not (Exn.is_interrupt_exn res));
53 fun memo_exec execution_id (Memo v) =
54 Synchronized.timed_access v (K (SOME Time.zeroTime))
58 uninterruptible (fn restore_attributes => fn () =>
59 if Execution.running execution_id exec_id then
61 val res = Exn.capture (restore_attributes e) ();
62 val _ = Execution.finished exec_id;
63 in SOME (Exn.is_interrupt_exn res, Result res) end
64 else SOME (true, expr)) ()
65 | Result _ => SOME (false, expr)))
66 |> (fn SOME false => ()
67 | SOME true => Exn.interrupt ()
68 | NONE => error "Conflicting command execution");
70 fun memo_fork params execution_id (Memo v) =
71 (case Synchronized.value v of
73 | _ => ignore ((singleton o Future.forks) params (fn () => memo_exec execution_id (Memo v))));
79 (** main phases of execution **)
85 val outer_syntax = #2 (Outer_Syntax.get_syntax ());
86 val command_reports = Outer_Syntax.command_reports outer_syntax;
89 Position.set_range (Token.position_range_of (#1 (take_suffix Token.is_improper span)));
91 (case find_first Token.is_command span of
92 SOME tok => Token.position_of tok
93 | NONE => proper_range);
95 val (is_malformed, token_reports) = Thy_Syntax.reports_of_tokens span;
96 val _ = Position.reports_text (token_reports @ maps command_reports span);
98 if is_malformed then Toplevel.malformed pos "Malformed command syntax"
100 (case Outer_Syntax.read_spans outer_syntax span of
102 if Keyword.is_control (Toplevel.name_of tr) then
103 Toplevel.malformed pos "Illegal control command"
104 else Toplevel.modify_init init tr
105 | [] => Toplevel.ignored (Position.set_range (Token.position_range_of span))
106 | _ => Toplevel.malformed proper_range "Exactly one command expected")
107 handle ERROR msg => Toplevel.malformed proper_range msg
114 {failed: bool, malformed: bool, command: Toplevel.transition, state: Toplevel.state};
115 val init_eval_state =
116 {failed = false, malformed = false, command = Toplevel.empty, state = Toplevel.toplevel};
118 datatype eval = Eval of {exec_id: Document_ID.exec, eval_process: eval_state memo};
120 fun eval_eq (Eval {exec_id, ...}, Eval {exec_id = exec_id', ...}) = exec_id = exec_id';
122 fun eval_finished (Eval {eval_process, ...}) = memo_finished eval_process;
124 fun eval_result (Eval {eval_process, ...}) = memo_result eval_process;
125 val eval_result_state = #state o eval_result;
130 if Goal.future_enabled () andalso Keyword.is_diag (Toplevel.name_of tr) then
131 (Goal.fork_params {name = "Toplevel.diag", pos = Toplevel.pos_of tr, pri = ~1}
132 (fn () => Toplevel.command_exception int tr st); ([], SOME st))
133 else Toplevel.command_errors int tr st;
135 fun check_cmts span tr st' =
136 Toplevel.setmp_thread_position tr
138 Outer_Syntax.side_comments span |> maps (fn cmt =>
139 (Thy_Output.check_text (Token.source_position_of cmt) st'; [])
141 if Exn.is_interrupt exn then reraise exn
142 else ML_Compiler.exn_messages_ids exn)) ();
144 fun proof_status tr st =
145 (case try Toplevel.proof_of st of
146 SOME prf => Toplevel.status tr (Proof.status_markup prf)
149 fun eval_state span tr ({malformed, state = st, ...}: eval_state) =
151 {failed = true, malformed = malformed, command = tr, state = Toplevel.toplevel}
154 val malformed' = Toplevel.is_malformed tr;
155 val is_init = Toplevel.is_init tr;
156 val is_proof = Keyword.is_proof (Toplevel.name_of tr);
158 val _ = Multithreading.interrupted ();
159 val _ = Toplevel.status tr Markup.running;
160 val (errs1, result) = run (is_init orelse is_proof) (Toplevel.set_print false tr) st;
161 val errs2 = (case result of NONE => [] | SOME st' => check_cmts span tr st');
162 val errs = errs1 @ errs2;
163 val _ = Toplevel.status tr Markup.finished;
164 val _ = List.app (Future.error_msg (Toplevel.pos_of tr)) errs;
169 val _ = if null errs then Exn.interrupt () else ();
170 val _ = Toplevel.status tr Markup.failed;
171 in {failed = true, malformed = malformed', command = tr, state = st} end
174 val _ = proof_status tr st';
175 in {failed = false, malformed = malformed', command = tr, state = st'} end)
180 fun eval init span eval0 =
182 val exec_id = Document_ID.make ();
186 Position.setmp_thread_data (Position.id_only (Document_ID.print exec_id))
187 (fn () => read init span |> Toplevel.exec_id exec_id) ();
188 in eval_state span tr (eval_result eval0) end;
189 in Eval {exec_id = exec_id, eval_process = memo exec_id process} end;
196 datatype print = Print of
197 {name: string, delay: Time.time option, pri: int, persistent: bool,
198 exec_id: Document_ID.exec, print_process: unit memo};
200 type print_fn = Toplevel.transition -> Toplevel.state -> unit;
202 type print_function =
203 {command_name: string} ->
204 {delay: Time.time option, pri: int, persistent: bool, print_fn: print_fn} option;
208 val print_functions =
209 Synchronized.var "Command.print_functions" ([]: (string * print_function) list);
211 fun print_error tr e =
212 (Toplevel.setmp_thread_position tr o Runtime.controlled_execution) e ()
214 if Exn.is_interrupt exn then reraise exn
215 else List.app (Future.error_msg (Toplevel.pos_of tr)) (ML_Compiler.exn_messages_ids exn);
217 fun print_eq (Print {exec_id, ...}, Print {exec_id = exec_id', ...}) = exec_id = exec_id';
219 fun print_finished (Print {exec_id, print_process, ...}) = memo_finished print_process;
221 fun print_persistent (Print {persistent, ...}) = persistent;
225 fun print command_visible command_name eval old_prints =
227 fun new_print (name, get_pr) =
229 fun make_print strict {delay, pri, persistent, print_fn} =
231 val exec_id = Document_ID.make ();
234 val {failed, command, state = st', ...} = eval_result eval;
235 val tr = Toplevel.exec_id exec_id command;
237 if failed andalso not strict then ()
238 else print_error tr (fn () => print_fn tr st')
242 name = name, delay = delay, pri = pri, persistent = persistent,
243 exec_id = exec_id, print_process = memo exec_id process}
246 (case Exn.capture (Runtime.controlled_execution get_pr) {command_name = command_name} of
248 | Exn.Res (SOME pr) => SOME (make_print false pr)
250 SOME (make_print true
251 {delay = NONE, pri = 0, persistent = false, print_fn = fn _ => fn _ => reraise exn}))
255 if command_visible then
256 rev (Synchronized.value print_functions) |> map_filter (fn pr =>
257 (case find_first (fn Print {name, ...} => name = fst pr) old_prints of
260 else filter (fn print => print_finished print andalso print_persistent print) old_prints;
262 if eq_list print_eq (old_prints, new_prints) then NONE else SOME new_prints
265 fun print_function name f =
266 Synchronized.change print_functions (fn funs =>
267 (if not (AList.defined (op =) funs name) then ()
268 else warning ("Redefining command print function: " ^ quote name);
269 AList.update (op =) (name, f) funs));
271 fun no_print_function name =
272 Synchronized.change print_functions (filter_out (equal name o #1));
277 print_function "print_state"
278 (fn {command_name} =>
279 SOME {delay = NONE, pri = 1, persistent = true,
280 print_fn = fn tr => fn st' =>
282 val is_init = Keyword.is_theory_begin command_name;
283 val is_proof = Keyword.is_proof command_name;
286 (Toplevel.print_of tr orelse (is_proof andalso Toplevel.is_proof st'));
287 in if do_print then Toplevel.print_state false st' else () end});
290 (* combined execution *)
292 type exec = eval * print list;
294 (Eval {exec_id = Document_ID.none, eval_process = memo_value init_eval_state}, []);
296 fun exec_ids NONE = []
297 | exec_ids (SOME (Eval {exec_id, ...}, prints)) =
298 exec_id :: map (fn Print {exec_id, ...} => exec_id) prints;
302 fun run_print execution_id (Print {name, delay, pri, print_process, ...}) =
303 if Multithreading.enabled () then
305 val group = Future.worker_subgroup ();
307 memo_fork {name = name, group = SOME group, deps = [], pri = pri, interrupts = true}
308 execution_id print_process;
312 | SOME d => ignore (Event_Timer.request (Time.+ (Time.now (), d)) fork))
314 else memo_exec execution_id print_process;
318 fun exec execution_id (Eval {eval_process, ...}, prints) =
319 (memo_exec execution_id eval_process; List.app (run_print execution_id) prints);