author | blanchet |
Wed, 28 Jul 2010 19:01:34 +0200 | |
changeset 38046 | 6659c15e7421 |
parent 37960 | src/HOL/Tools/ATP_Manager/async_manager.ML@e557d511c791 |
child 38047 | 9033c03cc214 |
permissions | -rw-r--r-- |
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(* Title: HOL/Tools/ATP_Manager/async_manager.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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*) |
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signature ASYNC_MANAGER = |
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sig |
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val launch : |
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string -> bool -> Time.time -> Time.time -> string -> (unit -> string) |
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-> unit |
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val kill_threads : string -> string -> unit |
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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 : ASYNC_MANAGER = |
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struct |
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(** preferences **) |
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val message_store_limit = 20; |
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val message_display_limit = 5; |
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(** thread management **) |
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(* data structures over threads *) |
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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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(* state of thread manager *) |
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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: (Thread.thread * (string * Time.time * Time.time * string)) list, |
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canceling: (Thread.thread * (string * Time.time * string)) list, |
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messages: (string * string) list, |
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store: (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" |
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(make_state NONE Thread_Heap.empty [] [] [] []); |
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(* unregister thread *) |
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fun unregister verbose 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, birth_time, _, 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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desc ^ "\n" ^ message ^ |
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(if verbose then |
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"Total time: " ^ Int.toString (Time.toMilliseconds |
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(Time.- (now, birth_time))) ^ " ms.\n" |
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else |
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"") |
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val messages' = (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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(* main manager thread -- only one may exist *) |
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val min_wait_time = Time.fromMilliseconds 300; |
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val max_wait_time = Time.fromSeconds 10; |
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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, |
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whereby "pr" in "proof" is not highlighted. *) |
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fun break_into_chunks xs = |
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maps (space_explode "\000" o replace_all "\n\n" "\000" o snd) xs |
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fun print_new_messages () = |
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case Synchronized.change_result global_state |
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(fn {manager, timeout_heap, active, canceling, messages, store} => |
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(messages, make_state manager timeout_heap active canceling [] |
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store)) of |
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[] => () |
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| msgs as (tool, _) :: _ => |
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let val ss = break_into_chunks msgs in |
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List.app priority (tool ^ ": " ^ hd ss :: tl ss) |
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end |
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fun check_thread_manager verbose = 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 (Toplevel.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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127 |
|
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128 |
(*action: find threads whose timeout is reached, and interrupt canceling threads*) |
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129 |
fun action {manager, timeout_heap, active, canceling, messages, store} = |
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130 |
let val (timeout_threads, timeout_heap') = |
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131 |
Thread_Heap.upto (Time.now (), Thread.self ()) timeout_heap; |
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132 |
in |
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if null timeout_threads andalso null canceling then |
134 |
NONE |
|
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135 |
else |
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|
136 |
let |
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137 |
val _ = List.app (Simple_Thread.interrupt o #1) canceling |
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138 |
val canceling' = filter (Thread.isActive o #1) canceling |
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139 |
val state' = make_state manager timeout_heap' active canceling' messages store; |
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140 |
in SOME (map #2 timeout_threads, state') end |
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141 |
end; |
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142 |
in |
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|
143 |
while Synchronized.change_result global_state |
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144 |
(fn state as {timeout_heap, active, canceling, messages, store, ...} => |
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145 |
if null active andalso null canceling andalso null messages |
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146 |
then (false, make_state NONE timeout_heap active canceling messages store) |
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147 |
else (true, state)) |
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148 |
do |
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|
149 |
(Synchronized.timed_access global_state (SOME o time_limit o #timeout_heap) action |
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150 |
|> these |
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151 |
|> List.app (unregister verbose "Timed out.\n"); |
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print_new_messages (); |
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153 |
(*give threads some time to respond to interrupt*) |
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154 |
OS.Process.sleep min_wait_time) |
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155 |
end)) |
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156 |
in make_state manager timeout_heap active canceling messages store end) |
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157 |
|
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|
158 |
|
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159 |
(* register thread *) |
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160 |
|
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fun register tool verbose birth_time death_time desc thread = |
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162 |
(Synchronized.change global_state |
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163 |
(fn {manager, timeout_heap, active, canceling, messages, store} => |
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164 |
let |
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165 |
val timeout_heap' = Thread_Heap.insert (death_time, thread) timeout_heap; |
37585 | 166 |
val active' = update_thread (thread, (tool, birth_time, death_time, desc)) active; |
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167 |
val state' = make_state manager timeout_heap' active' canceling messages store; |
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168 |
in state' end); |
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check_thread_manager verbose); |
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170 |
|
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|
171 |
|
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fun launch tool verbose birth_time death_time desc f = |
173 |
(Toplevel.thread true |
|
174 |
(fn () => |
|
175 |
let |
|
176 |
val self = Thread.self () |
|
177 |
val _ = register tool verbose birth_time death_time desc self |
|
178 |
val message = f () |
|
179 |
in unregister verbose message self end); |
|
180 |
()) |
|
181 |
||
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182 |
|
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183 |
(** user commands **) |
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184 |
|
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185 |
(* kill threads *) |
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186 |
|
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fun kill_threads tool workers = Synchronized.change global_state |
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188 |
(fn {manager, timeout_heap, active, canceling, messages, store} => |
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189 |
let |
37585 | 190 |
val killing = |
191 |
map_filter (fn (th, (tool', _, _, desc)) => |
|
192 |
if tool' = tool then SOME (th, (tool', Time.now (), desc)) |
|
193 |
else NONE) active |
|
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194 |
val state' = make_state manager timeout_heap [] (killing @ canceling) messages store; |
37585 | 195 |
val _ = if null killing then () else priority ("Killed active " ^ workers ^ ".") |
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196 |
in state' end); |
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197 |
|
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|
198 |
|
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199 |
(* running threads *) |
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200 |
|
37585 | 201 |
fun seconds time = string_of_int (Time.toSeconds time) ^ " s" |
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202 |
|
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fun running_threads tool workers = |
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204 |
let |
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|
205 |
val {active, canceling, ...} = Synchronized.value global_state; |
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206 |
|
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|
207 |
val now = Time.now (); |
37585 | 208 |
fun running_info (_, (tool', birth_time, death_time, desc)) = |
209 |
if tool' = tool then |
|
210 |
SOME ("Running: " ^ seconds (Time.- (now, birth_time)) ^ " -- " ^ |
|
211 |
seconds (Time.- (death_time, now)) ^ " to live:\n" ^ desc) |
|
212 |
else |
|
213 |
NONE |
|
214 |
fun canceling_info (_, (tool', death_time, desc)) = |
|
215 |
if tool' = tool then |
|
216 |
SOME ("Trying to interrupt thread since " ^ |
|
217 |
seconds (Time.- (now, death_time)) ^ ":\n" ^ desc) |
|
218 |
else |
|
219 |
NONE |
|
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220 |
val running = |
37585 | 221 |
case map_filter running_info active of |
222 |
[] => ["No " ^ workers ^ " running."] |
|
223 |
| ss => "Running " ^ workers ^ ":" :: ss |
|
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224 |
val interrupting = |
37585 | 225 |
case map_filter canceling_info canceling of |
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226 |
[] => [] |
37585 | 227 |
| ss => "Trying to interrupt the following " ^ workers ^ ":" :: ss |
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228 |
in priority (space_implode "\n\n" (running @ interrupting)) end |
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229 |
|
37585 | 230 |
fun thread_messages tool worker opt_limit = |
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231 |
let |
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|
232 |
val limit = the_default message_display_limit opt_limit; |
37585 | 233 |
val tool_store = Synchronized.value global_state |
234 |
|> #store |> filter (curry (op =) tool o fst) |
|
37583
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|
235 |
val header = |
37585 | 236 |
"Recent " ^ worker ^ " messages" ^ |
237 |
(if length tool_store <= limit then ":" |
|
238 |
else " (" ^ string_of_int limit ^ " displayed):"); |
|
239 |
in List.app priority (header :: break_into_chunks (#1 (chop limit tool_store))) end |
|
37583
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|
240 |
|
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|
241 |
end; |