author | wenzelm |
Thu, 29 Jan 2015 16:35:29 +0100 | |
changeset 59471 | ca459352d8c5 |
parent 59468 | src/HOL/Tools/Sledgehammer/async_manager.ML@fe6651760643 |
child 60764 | b610ba36e02c |
permissions | -rw-r--r-- |
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(* Title: HOL/Tools/Sledgehammer/async_manager_legacy.ML |
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Author: Fabian Immler, TU Muenchen |
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Author: Makarius |
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Author: Jasmin Blanchette, TU Muenchen |
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Central manager for asynchronous diagnosis tool threads. |
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Proof General legacy! |
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*) |
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signature ASYNC_MANAGER_LEGACY = |
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sig |
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val break_into_chunks : string -> string list |
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val thread : string -> Time.time -> Time.time -> string * string -> (unit -> bool * string) -> |
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unit |
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val kill_threads : string -> string -> unit |
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val has_running_threads : string -> bool |
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val running_threads : string -> string -> unit |
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val thread_messages : string -> string -> int option -> unit |
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end; |
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structure Async_Manager_Legacy : ASYNC_MANAGER_LEGACY = |
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struct |
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fun make_thread interrupts body = |
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Thread.fork |
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(fn () => |
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Runtime.debugging NONE body () handle exn => |
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if Exn.is_interrupt exn then () |
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else writeln ("## INTERNAL ERROR ##\n" ^ Runtime.exn_message exn), |
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Simple_Thread.attributes {stack_limit = NONE, interrupts = interrupts}); |
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val message_store_limit = 20 |
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val message_display_limit = 10 |
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fun implode_message (workers, work) = |
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space_implode " " (Try.serial_commas "and" workers) ^ work |
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structure Thread_Heap = Heap |
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( |
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type elem = Time.time * Thread.thread |
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fun ord ((a, _), (b, _)) = Time.compare (a, b) |
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) |
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fun lookup_thread xs = AList.lookup Thread.equal xs |
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fun delete_thread xs = AList.delete Thread.equal xs |
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fun update_thread xs = AList.update Thread.equal xs |
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type state = |
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{manager: Thread.thread option, |
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timeout_heap: Thread_Heap.T, |
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active: |
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(Thread.thread |
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* (string * Time.time * Time.time * (string * string))) list, |
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canceling: (Thread.thread * (string * Time.time * (string * string))) list, |
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messages: (bool * (string * (string * string))) list, |
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store: (string * (string * string)) list} |
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fun make_state manager timeout_heap active canceling messages store : state = |
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{manager = manager, timeout_heap = timeout_heap, active = active, |
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canceling = canceling, messages = messages, store = store} |
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val global_state = Synchronized.var "async_manager" (make_state NONE Thread_Heap.empty [] [] [] []) |
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fun unregister (urgent, message) thread = |
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Synchronized.change global_state |
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(fn state as {manager, timeout_heap, active, canceling, messages, store} => |
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(case lookup_thread active thread of |
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SOME (tool, _, _, desc as (worker, its_desc)) => |
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let |
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val active' = delete_thread thread active |
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val now = Time.now () |
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val canceling' = (thread, (tool, now, desc)) :: canceling |
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val message' = |
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(worker, its_desc ^ (if message = "" then "" else "\n" ^ message)) |
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val messages' = (urgent, (tool, message')) :: messages |
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val store' = (tool, message') :: |
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(if length store <= message_store_limit then store |
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else #1 (chop message_store_limit store)) |
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in make_state manager timeout_heap active' canceling' messages' store' end |
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| NONE => state)) |
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val min_wait_time = seconds 0.3 |
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val max_wait_time = seconds 10.0 |
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fun replace_all bef aft = |
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let |
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fun aux seen "" = String.implode (rev seen) |
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| aux seen s = |
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if String.isPrefix bef s then |
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aux seen "" ^ aft ^ aux [] (unprefix bef s) |
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else |
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aux (String.sub (s, 0) :: seen) (String.extract (s, 1, NONE)) |
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in aux [] end |
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(* This is a workaround for Proof General's off-by-a-few sendback display bug, whereby "pr" in |
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"proof" is not highlighted. *) |
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val break_into_chunks = space_explode "\000" o replace_all "\n\n" "\000" |
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fun print_new_messages () = |
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Synchronized.change_result global_state |
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(fn {manager, timeout_heap, active, canceling, messages, store} => |
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messages |
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|> List.partition |
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(fn (urgent, _) => |
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(null active andalso null canceling) orelse urgent) |
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||> (fn postponed_messages => |
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make_state manager timeout_heap active canceling |
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postponed_messages store)) |
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|> map (fn (_, (tool, (worker, work))) => ((tool, work), worker)) |
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|> AList.group (op =) |
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|> List.app (fn ((_, ""), _) => () |
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| ((tool, work), workers) => |
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tool ^ ": " ^ |
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implode_message (workers |> sort_distinct string_ord, work) |
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|> break_into_chunks |
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|> List.app writeln) |
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fun check_thread_manager () = Synchronized.change global_state |
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(fn state as {manager, timeout_heap, active, canceling, messages, store} => |
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if (case manager of SOME thread => Thread.isActive thread | NONE => false) then state |
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else let val manager = SOME (make_thread false (fn () => |
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let |
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fun time_limit timeout_heap = |
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(case try Thread_Heap.min timeout_heap of |
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NONE => Time.+ (Time.now (), max_wait_time) |
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| SOME (time, _) => time) |
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(*action: find threads whose timeout is reached, and interrupt canceling threads*) |
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fun action {manager, timeout_heap, active, canceling, messages, store} = |
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let val (timeout_threads, timeout_heap') = |
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Thread_Heap.upto (Time.now (), Thread.self ()) timeout_heap |
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133 |
in |
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if null timeout_threads andalso null canceling then |
135 |
NONE |
|
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136 |
else |
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let |
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val _ = List.app (Simple_Thread.interrupt_unsynchronized o #1) canceling |
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val canceling' = filter (Thread.isActive o #1) canceling |
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val state' = make_state manager timeout_heap' active canceling' messages store |
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in SOME (map #2 timeout_threads, state') end |
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142 |
end |
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143 |
in |
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while Synchronized.change_result global_state |
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(fn state as {timeout_heap, active, canceling, messages, store, ...} => |
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if null active andalso null canceling andalso null messages |
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then (false, make_state NONE timeout_heap active canceling messages store) |
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else (true, state)) |
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do |
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(Synchronized.timed_access global_state |
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(SOME o time_limit o #timeout_heap) action |
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|> these |
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|> List.app (unregister (false, "Timed out.")); |
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print_new_messages (); |
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(* give threads some time to respond to interrupt *) |
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OS.Process.sleep min_wait_time) |
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end)) |
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in make_state manager timeout_heap active canceling messages store end) |
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159 |
|
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fun register tool birth_time death_time desc thread = |
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(Synchronized.change global_state |
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(fn {manager, timeout_heap, active, canceling, messages, store} => |
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let |
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val timeout_heap' = Thread_Heap.insert (death_time, thread) timeout_heap |
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val active' = update_thread (thread, (tool, birth_time, death_time, desc)) active |
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val state' = make_state manager timeout_heap' active' canceling messages store |
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in state' end); |
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check_thread_manager ()) |
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169 |
|
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fun thread tool birth_time death_time desc f = |
58894 | 171 |
(make_thread true |
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(fn () => |
173 |
let |
|
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val self = Thread.self () |
|
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val _ = register tool birth_time death_time desc self |
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in unregister (f ()) self end); |
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()) |
178 |
||
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fun kill_threads tool das_wort_worker = Synchronized.change global_state |
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(fn {manager, timeout_heap, active, canceling, messages, store} => |
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181 |
let |
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val killing = |
183 |
map_filter (fn (th, (tool', _, _, desc)) => |
|
184 |
if tool' = tool then SOME (th, (tool', Time.now (), desc)) |
|
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else NONE) active |
|
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val state' = make_state manager timeout_heap [] (killing @ canceling) messages store |
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val _ = |
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if null killing then () |
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else writeln ("Interrupted active " ^ das_wort_worker ^ "s.") |
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in state' end) |
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191 |
|
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fun str_of_time time = string_of_int (Time.toSeconds time) ^ " s" |
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193 |
|
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fun has_running_threads tool = |
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exists (fn (_, (tool', _, _, _)) => tool' = tool) (#active (Synchronized.value global_state)) |
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196 |
|
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fun running_threads tool das_wort_worker = |
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let |
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val {active, canceling, ...} = Synchronized.value global_state |
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val now = Time.now () |
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fun running_info (_, (tool', birth_time, death_time, desc)) = |
202 |
if tool' = tool then |
|
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SOME ("Running: " ^ str_of_time (Time.- (now, birth_time)) ^ " -- " ^ |
204 |
str_of_time (Time.- (death_time, now)) ^ " to live:\n" ^ op ^ desc) |
|
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else |
206 |
NONE |
|
207 |
fun canceling_info (_, (tool', death_time, desc)) = |
|
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if tool' = tool then |
|
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SOME ("Trying to interrupt " ^ das_wort_worker ^ " since " ^ |
57556 | 210 |
str_of_time (Time.- (now, death_time)) ^ ":\n" ^ op ^ desc) |
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else |
212 |
NONE |
|
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val running = |
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case map_filter running_info active of |
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[] => ["No " ^ das_wort_worker ^ "s running."] |
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| ss => "Running " ^ das_wort_worker ^ "s" :: ss |
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val interrupting = |
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case map_filter canceling_info canceling of |
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219 |
[] => [] |
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| ss => "Interrupting " ^ das_wort_worker ^ "s" :: ss |
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in writeln (space_implode "\n\n" (running @ interrupting)) end |
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222 |
|
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fun thread_messages tool das_wort_worker opt_limit = |
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let |
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val limit = the_default message_display_limit opt_limit |
37585 | 226 |
val tool_store = Synchronized.value global_state |
227 |
|> #store |> filter (curry (op =) tool o fst) |
|
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val header = |
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"Recent " ^ das_wort_worker ^ " messages" ^ |
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(if length tool_store <= limit then ":" |
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else " (" ^ string_of_int limit ^ " displayed):") |
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val ss = tool_store |> chop limit |> #1 |> map (op ^ o snd) |
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in List.app writeln (header :: maps break_into_chunks ss) end |
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234 |
|
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235 |
end; |