author | wenzelm |
Fri, 12 Jul 2013 11:28:03 +0200 | |
changeset 52606 | 0d68d108d7e0 |
parent 52605 | a2a805549c74 |
child 52607 | 33a133d50616 |
permissions | -rw-r--r-- |
47336 | 1 |
(* Title: Pure/PIDE/command.ML |
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Author: Makarius |
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Prover command execution: read -- eval -- print. |
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*) |
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signature COMMAND = |
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sig |
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val read: (unit -> theory) -> Token.T list -> Toplevel.transition |
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type eval |
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val eval_result_state: eval -> Toplevel.state |
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val eval_same: eval * eval -> bool |
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val eval: (unit -> theory) -> Token.T list -> eval -> eval |
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type print |
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val print: bool -> string -> eval -> print list -> print list option |
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type print_fn = Toplevel.transition -> Toplevel.state -> unit |
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val print_function: {name: string, pri: int, persistent: bool} -> |
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({command_name: string} -> print_fn option) -> unit |
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val no_print_function: string -> unit |
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type exec = eval * print list |
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val no_exec: exec |
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val exec_ids: exec option -> Document_ID.exec list |
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val exec: Document_ID.execution -> exec -> unit |
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end; |
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structure Command: COMMAND = |
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struct |
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(** memo results -- including physical interrupts! **) |
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datatype 'a expr = |
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Expr of Document_ID.exec * (unit -> 'a) | |
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Result of 'a Exn.result; |
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abstype 'a memo = Memo of 'a expr Synchronized.var |
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with |
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fun memo exec_id e = Memo (Synchronized.var "Command.memo" (Expr (exec_id, e))); |
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fun memo_value a = Memo (Synchronized.var "Command.memo" (Result (Exn.Res a))); |
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fun memo_result (Memo v) = |
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(case Synchronized.value v of |
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Result res => Exn.release res |
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| Expr (exec_id, _) => error ("Unfinished execution result: " ^ Document_ID.print exec_id)); |
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fun memo_exec context (Memo v) = |
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(case Synchronized.value v of |
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Result res => res |
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| Expr _ => |
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Synchronized.timed_access v (fn _ => SOME Time.zeroTime) |
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(fn Result res => SOME (res, Result res) |
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| expr as Expr (exec_id, e) => |
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uninterruptible (fn restore_attributes => fn () => |
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if Execution.running context exec_id then |
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let |
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val res = Exn.capture (restore_attributes e) (); |
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val _ = Execution.finished exec_id (not (Exn.is_interrupt_exn res)); |
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in SOME (res, Result res) end |
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else SOME (Exn.interrupt_exn, expr)) ()) |
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|> (fn NONE => error "Concurrent execution attempt" | SOME res => res)) |
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|> Exn.release |> ignore; |
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fun memo_fork params context (Memo v) = |
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(case Synchronized.value v of |
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Result _ => () |
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| _ => ignore ((singleton o Future.forks) params (fn () => memo_exec context (Memo v)))); |
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end; |
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(** main phases of execution **) |
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(* read *) |
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fun read init span = |
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let |
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val outer_syntax = #2 (Outer_Syntax.get_syntax ()); |
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val command_reports = Outer_Syntax.command_reports outer_syntax; |
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val proper_range = |
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Position.set_range (Token.position_range_of (#1 (take_suffix Token.is_improper span))); |
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val pos = |
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(case find_first Token.is_command span of |
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SOME tok => Token.position_of tok |
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| NONE => proper_range); |
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val (is_malformed, token_reports) = Thy_Syntax.reports_of_tokens span; |
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val _ = Position.reports_text (token_reports @ maps command_reports span); |
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in |
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if is_malformed then Toplevel.malformed pos "Malformed command syntax" |
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else |
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(case Outer_Syntax.read_spans outer_syntax span of |
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[tr] => |
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if Keyword.is_control (Toplevel.name_of tr) then |
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Toplevel.malformed pos "Illegal control command" |
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else Toplevel.modify_init init tr |
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| [] => Toplevel.ignored (Position.set_range (Token.position_range_of span)) |
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| _ => Toplevel.malformed proper_range "Exactly one command expected") |
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handle ERROR msg => Toplevel.malformed proper_range msg |
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end; |
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(* eval *) |
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type eval_state = |
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{failed: bool, malformed: bool, command: Toplevel.transition, state: Toplevel.state}; |
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val init_eval_state = |
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{failed = false, malformed = false, command = Toplevel.empty, state = Toplevel.toplevel}; |
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datatype eval = Eval of {exec_id: Document_ID.exec, eval_process: eval_state memo}; |
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fun eval_result (Eval {eval_process, ...}) = memo_result eval_process; |
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val eval_result_state = #state o eval_result; |
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fun eval_same (Eval {exec_id, ...}, Eval {exec_id = exec_id', ...}) = |
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exec_id = exec_id' andalso Execution.is_stable exec_id; |
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local |
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fun run int tr st = |
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if Goal.future_enabled () andalso Keyword.is_diag (Toplevel.name_of tr) then |
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(Goal.fork_params {name = "Toplevel.diag", pos = Toplevel.pos_of tr, pri = ~1} |
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(fn () => Toplevel.command_exception int tr st); ([], SOME st)) |
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else Toplevel.command_errors int tr st; |
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fun check_cmts span tr st' = |
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Toplevel.setmp_thread_position tr |
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(fn () => |
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Outer_Syntax.side_comments span |> maps (fn cmt => |
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(Thy_Output.check_text (Token.source_position_of cmt) st'; []) |
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handle exn => ML_Compiler.exn_messages_ids exn)) (); |
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fun proof_status tr st = |
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(case try Toplevel.proof_of st of |
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SOME prf => Toplevel.status tr (Proof.status_markup prf) |
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| NONE => ()); |
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fun eval_state span tr ({malformed, state = st, ...}: eval_state) = |
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if malformed then |
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{failed = true, malformed = malformed, command = tr, state = Toplevel.toplevel} |
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else |
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let |
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val malformed' = Toplevel.is_malformed tr; |
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val is_init = Toplevel.is_init tr; |
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val is_proof = Keyword.is_proof (Toplevel.name_of tr); |
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val _ = Multithreading.interrupted (); |
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val _ = Toplevel.status tr Markup.running; |
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val (errs1, result) = run (is_init orelse is_proof) (Toplevel.set_print false tr) st; |
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val errs2 = (case result of NONE => [] | SOME st' => check_cmts span tr st'); |
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val errs = errs1 @ errs2; |
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val _ = Toplevel.status tr Markup.finished; |
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val _ = List.app (Future.error_msg (Toplevel.pos_of tr)) errs; |
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in |
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(case result of |
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NONE => |
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let |
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val _ = if null errs then Exn.interrupt () else (); |
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val _ = Toplevel.status tr Markup.failed; |
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in {failed = true, malformed = malformed', command = tr, state = st} end |
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| SOME st' => |
162 |
let |
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163 |
val _ = proof_status tr st'; |
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in {failed = false, malformed = malformed', command = tr, state = st'} end) |
48772 | 165 |
end; |
47336 | 166 |
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in |
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fun eval init span eval0 = |
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let |
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val exec_id = Document_ID.make (); |
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fun process () = |
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let |
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val tr = |
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Position.setmp_thread_data (Position.id_only (Document_ID.print exec_id)) |
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(fn () => read init span |> Toplevel.exec_id exec_id) (); |
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in eval_state span tr (eval_result eval0) end; |
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in Eval {exec_id = exec_id, eval_process = memo exec_id process} end; |
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end; |
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(* print *) |
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datatype print = Print of |
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{name: string, pri: int, persistent: bool, |
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exec_id: Document_ID.exec, print_process: unit memo}; |
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type print_fn = Toplevel.transition -> Toplevel.state -> unit; |
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local |
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type print_function = string * (int * bool * ({command_name: string} -> print_fn option)); |
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val print_functions = Synchronized.var "Command.print_functions" ([]: print_function list); |
52511 | 195 |
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fun print_error tr e = |
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(Toplevel.setmp_thread_position tr o Runtime.controlled_execution) e () handle exn => |
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List.app (Future.error_msg (Toplevel.pos_of tr)) (ML_Compiler.exn_messages_ids exn); |
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fun print_persistent (Print {persistent, ...}) = persistent; |
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fun print_stable (Print {exec_id, ...}) = Execution.is_stable exec_id; |
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fun print_eq (Print {exec_id, ...}, Print {exec_id = exec_id', ...}) = exec_id = exec_id'; |
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in |
52509 | 205 |
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fun print command_visible command_name eval old_prints = |
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let |
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fun new_print (name, (pri, persistent, get_fn)) = |
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let |
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fun make_print strict print_fn = |
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211 |
let |
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212 |
val exec_id = Document_ID.make (); |
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213 |
fun process () = |
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let |
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val {failed, command, state = st', ...} = eval_result eval; |
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val tr = Toplevel.exec_id exec_id command; |
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217 |
in |
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218 |
if failed andalso not strict then () |
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else print_error tr (fn () => print_fn tr st') |
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220 |
end; |
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221 |
in |
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Print { |
223 |
name = name, pri = pri, persistent = persistent, |
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exec_id = exec_id, print_process = memo exec_id process} |
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225 |
end; |
52570 | 226 |
in |
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(case Exn.capture (Runtime.controlled_execution get_fn) {command_name = command_name} of |
52570 | 228 |
Exn.Res NONE => NONE |
229 |
| Exn.Res (SOME print_fn) => SOME (make_print false print_fn) |
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230 |
| Exn.Exn exn => SOME (make_print true (fn _ => fn _ => reraise exn))) |
|
231 |
end; |
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232 |
||
233 |
val new_prints = |
|
234 |
if command_visible then |
|
235 |
rev (Synchronized.value print_functions) |> map_filter (fn pr => |
|
52600 | 236 |
(case find_first (fn Print {name, ...} => name = fst pr) old_prints of |
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237 |
SOME print => if print_stable print then SOME print else new_print pr |
52570 | 238 |
| NONE => new_print pr)) |
52600 | 239 |
else filter (fn print => print_persistent print andalso print_stable print) old_prints; |
52570 | 240 |
in |
52600 | 241 |
if eq_list print_eq (old_prints, new_prints) then NONE else SOME new_prints |
52570 | 242 |
end; |
52511 | 243 |
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244 |
fun print_function {name, pri, persistent} f = |
52511 | 245 |
Synchronized.change print_functions (fn funs => |
246 |
(if not (AList.defined (op =) funs name) then () |
|
247 |
else warning ("Redefining command print function: " ^ quote name); |
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248 |
AList.update (op =) (name, (pri, persistent, f)) funs)); |
52511 | 249 |
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52571 | 250 |
fun no_print_function name = |
251 |
Synchronized.change print_functions (filter_out (equal name o #1)); |
|
252 |
||
52511 | 253 |
end; |
254 |
||
52526 | 255 |
val _ = |
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256 |
print_function {name = "print_state", pri = 0, persistent = true} |
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257 |
(fn {command_name} => SOME (fn tr => fn st' => |
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258 |
let |
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|
259 |
val is_init = Keyword.is_theory_begin command_name; |
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260 |
val is_proof = Keyword.is_proof command_name; |
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|
261 |
val do_print = |
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|
262 |
not is_init andalso |
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(Toplevel.print_of tr orelse (is_proof andalso Toplevel.is_proof st')); |
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wenzelm
parents:
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diff
changeset
|
264 |
in if do_print then Toplevel.print_state false st' else () end)); |
52509 | 265 |
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52532 | 266 |
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52600 | 267 |
(* combined execution *) |
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||
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type exec = eval * print list; |
|
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val no_exec: exec = |
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(Eval {exec_id = Document_ID.none, eval_process = memo_value init_eval_state}, []); |
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fun exec_ids NONE = [] |
274 |
| exec_ids (SOME (Eval {exec_id, ...}, prints)) = |
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exec_id :: map (fn Print {exec_id, ...} => exec_id) prints; |
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local |
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fun run_print context (Print {name, pri, print_process, ...}) = |
52559
ddaf277e0d8c
more direct interleaving of eval/print and update/execution -- refrain from crude manipulation of max_threads;
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parents:
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changeset
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280 |
(if Multithreading.enabled () then |
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wenzelm
parents:
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changeset
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memo_fork {name = name, group = NONE, deps = [], pri = pri, interrupts = true} |
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else memo_exec) context print_process; |
52559
ddaf277e0d8c
more direct interleaving of eval/print and update/execution -- refrain from crude manipulation of max_threads;
wenzelm
parents:
52536
diff
changeset
|
283 |
|
52600 | 284 |
in |
285 |
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52604 | 286 |
fun exec context (Eval {eval_process, ...}, prints) = |
287 |
(memo_exec context eval_process; List.app (run_print context) prints); |
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52532 | 288 |
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47336 | 289 |
end; |
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52600 | 291 |
end; |
292 |