author | wenzelm |
Tue, 05 Jan 2010 23:38:10 +0100 | |
changeset 34277 | 7325a5e3587f |
parent 32814 | 81897d30b97f |
child 34279 | 02936e77a07c |
permissions | -rw-r--r-- |
28165 | 1 |
(* Title: Pure/Concurrent/task_queue.ML |
2 |
Author: Makarius |
|
3 |
||
4 |
Ordered queue of grouped tasks. |
|
5 |
*) |
|
6 |
||
7 |
signature TASK_QUEUE = |
|
8 |
sig |
|
29340 | 9 |
type task |
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
10 |
val dummy_task: task |
29121 | 11 |
val pri_of_task: task -> int |
28196 | 12 |
val str_of_task: task -> string |
29340 | 13 |
type group |
32221 | 14 |
val new_group: group option -> group |
32052 | 15 |
val group_id: group -> int |
29340 | 16 |
val eq_group: group * group -> bool |
32221 | 17 |
val cancel_group: group -> exn -> unit |
18 |
val is_canceled: group -> bool |
|
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
19 |
val group_status: group -> exn list |
28179 | 20 |
val str_of_group: group -> string |
28165 | 21 |
type queue |
22 |
val empty: queue |
|
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
23 |
val all_passive: queue -> bool |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
24 |
val status: queue -> {ready: int, pending: int, running: int, passive: int} |
32221 | 25 |
val cancel: queue -> group -> bool |
26 |
val cancel_all: queue -> group list |
|
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
27 |
val enqueue_passive: group -> queue -> task * queue |
32218
222f26693757
enqueue/finish: return minimal/maximal state of this task;
wenzelm
parents:
32192
diff
changeset
|
28 |
val enqueue: group -> task list -> int -> (bool -> bool) -> queue -> (task * bool) * queue |
29365 | 29 |
val extend: task -> (bool -> bool) -> queue -> queue option |
32249 | 30 |
val dequeue: Thread.thread -> queue -> (task * group * (bool -> bool) list) option * queue |
32814
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
31 |
val depend: task -> task list -> queue -> queue |
32249 | 32 |
val dequeue_towards: Thread.thread -> task list -> queue -> |
32224 | 33 |
(((task * group * (bool -> bool) list) option * task list) * queue) |
32221 | 34 |
val finish: task -> queue -> bool * queue |
28165 | 35 |
end; |
36 |
||
29340 | 37 |
structure Task_Queue:> TASK_QUEUE = |
28165 | 38 |
struct |
39 |
||
29121 | 40 |
(* tasks *) |
41 |
||
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
42 |
datatype task = Task of int option * serial; |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
43 |
val dummy_task = Task (NONE, ~1); |
29121 | 44 |
fun new_task pri = Task (pri, serial ()); |
28165 | 45 |
|
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
46 |
fun pri_of_task (Task (pri, _)) = the_default 0 pri; |
29121 | 47 |
fun str_of_task (Task (_, i)) = string_of_int i; |
28998 | 48 |
|
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
49 |
fun task_ord (Task t1, Task t2) = prod_ord (rev_order o option_ord int_ord) int_ord (t1, t2); |
31971
8c1b845ed105
renamed functor TableFun to Table, and GraphFun to Graph;
wenzelm
parents:
31632
diff
changeset
|
50 |
structure Task_Graph = Graph(type key = task val ord = task_ord); |
28165 | 51 |
|
28998 | 52 |
|
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
53 |
(* nested groups *) |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
54 |
|
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
55 |
datatype group = Group of |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
56 |
{parent: group option, |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
57 |
id: serial, |
32251 | 58 |
status: exn list Synchronized.var}; |
29121 | 59 |
|
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
60 |
fun make_group (parent, id, status) = Group {parent = parent, id = id, status = status}; |
32052 | 61 |
|
32251 | 62 |
fun new_group parent = make_group (parent, serial (), Synchronized.var "group" []); |
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
63 |
|
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
64 |
fun group_id (Group {id, ...}) = id; |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
65 |
fun eq_group (group1, group2) = group_id group1 = group_id group2; |
28551 | 66 |
|
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
67 |
fun group_ancestry (Group {parent, id, ...}) = |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
68 |
id :: (case parent of NONE => [] | SOME group => group_ancestry group); |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
69 |
|
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
70 |
|
32221 | 71 |
(* group status *) |
72 |
||
32251 | 73 |
fun cancel_group (Group {status, ...}) exn = |
74 |
Synchronized.change status |
|
75 |
(fn exns => |
|
76 |
(case exn of |
|
77 |
Exn.Interrupt => if null exns then [exn] else exns |
|
78 |
| _ => exn :: exns)); |
|
29121 | 79 |
|
32251 | 80 |
fun is_canceled (Group {parent, status, ...}) = |
81 |
not (null (Synchronized.value status)) orelse |
|
82 |
(case parent of NONE => false | SOME group => is_canceled group); |
|
32221 | 83 |
|
32251 | 84 |
fun group_status (Group {parent, status, ...}) = |
85 |
Synchronized.value status @ |
|
86 |
(case parent of NONE => [] | SOME group => group_status group); |
|
28165 | 87 |
|
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
88 |
fun str_of_group group = |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
89 |
(is_canceled group ? enclose "(" ")") (string_of_int (group_id group)); |
28179 | 90 |
|
28165 | 91 |
|
28176
01b21886e7f0
job: explicit 'ok' status -- false for canceled jobs;
wenzelm
parents:
28171
diff
changeset
|
92 |
(* jobs *) |
28165 | 93 |
|
94 |
datatype job = |
|
29365 | 95 |
Job of (bool -> bool) list | |
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
96 |
Running of Thread.thread | |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
97 |
Passive; |
28165 | 98 |
|
29121 | 99 |
type jobs = (group * job) Task_Graph.T; |
28176
01b21886e7f0
job: explicit 'ok' status -- false for canceled jobs;
wenzelm
parents:
28171
diff
changeset
|
100 |
|
29121 | 101 |
fun get_group (jobs: jobs) task = #1 (Task_Graph.get_node jobs task); |
102 |
fun get_job (jobs: jobs) task = #2 (Task_Graph.get_node jobs task); |
|
29365 | 103 |
fun set_job task job (jobs: jobs) = Task_Graph.map_node task (fn (group, _) => (group, job)) jobs; |
28202
23cb9a974630
added focus, which indicates a particular collection of high-priority tasks;
wenzelm
parents:
28196
diff
changeset
|
104 |
|
32250 | 105 |
fun add_job task dep (jobs: jobs) = |
106 |
Task_Graph.add_edge (dep, task) jobs handle Task_Graph.UNDEF _ => jobs; |
|
107 |
||
32814
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
108 |
fun add_dep task dep (jobs: jobs) = |
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
109 |
if Task_Graph.is_edge jobs (task, dep) then |
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
110 |
raise Fail "Cyclic dependency of future tasks" |
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
111 |
else add_job task dep jobs; |
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
112 |
|
32250 | 113 |
fun get_deps (jobs: jobs) task = |
114 |
Task_Graph.imm_preds jobs task handle Task_Graph.UNDEF _ => []; |
|
115 |
||
28176
01b21886e7f0
job: explicit 'ok' status -- false for canceled jobs;
wenzelm
parents:
28171
diff
changeset
|
116 |
|
01b21886e7f0
job: explicit 'ok' status -- false for canceled jobs;
wenzelm
parents:
28171
diff
changeset
|
117 |
(* queue of grouped jobs *) |
01b21886e7f0
job: explicit 'ok' status -- false for canceled jobs;
wenzelm
parents:
28171
diff
changeset
|
118 |
|
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
119 |
datatype result = Unknown | Result of task | No_Result; |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
120 |
|
28165 | 121 |
datatype queue = Queue of |
28184
5ed5cb73a2e9
eliminated cache, access queue efficiently via IntGraph.get_first;
wenzelm
parents:
28179
diff
changeset
|
122 |
{groups: task list Inttab.table, (*groups with presently active members*) |
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
123 |
jobs: jobs, (*job dependency graph*) |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
124 |
cache: result}; (*last dequeue result*) |
28165 | 125 |
|
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
126 |
fun make_queue groups jobs cache = Queue {groups = groups, jobs = jobs, cache = cache}; |
28204 | 127 |
|
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
128 |
val empty = make_queue Inttab.empty Task_Graph.empty No_Result; |
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
129 |
|
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
130 |
fun all_passive (Queue {jobs, ...}) = |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
131 |
Task_Graph.get_first NONE |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
132 |
((fn Job _ => SOME () | Running _ => SOME () | Passive => NONE) o #2 o #1 o #2) jobs |> is_none; |
28165 | 133 |
|
134 |
||
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
135 |
(* queue status *) |
32052 | 136 |
|
137 |
fun status (Queue {jobs, ...}) = |
|
138 |
let |
|
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
139 |
val (x, y, z, w) = |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
140 |
Task_Graph.fold (fn (_, ((_, job), (deps, _))) => fn (x, y, z, w) => |
32052 | 141 |
(case job of |
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
142 |
Job _ => if null deps then (x + 1, y, z, w) else (x, y + 1, z, w) |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
143 |
| Running _ => (x, y, z + 1, w) |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
144 |
| Passive => (x, y, z, w + 1))) |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
145 |
jobs (0, 0, 0, 0); |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
146 |
in {ready = x, pending = y, running = z, passive = w} end; |
32052 | 147 |
|
148 |
||
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
149 |
(* cancel -- peers and sub-groups *) |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
150 |
|
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
151 |
fun cancel (Queue {groups, jobs, ...}) group = |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
152 |
let |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
153 |
val _ = cancel_group group Exn.Interrupt; |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
154 |
val tasks = Inttab.lookup_list groups (group_id group); |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
155 |
val running = |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
156 |
fold (get_job jobs #> (fn Running t => insert Thread.equal t | _ => I)) tasks []; |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
157 |
val _ = List.app SimpleThread.interrupt running; |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
158 |
in null running end; |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
159 |
|
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
160 |
fun cancel_all (Queue {jobs, ...}) = |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
161 |
let |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
162 |
fun cancel_job (group, job) (groups, running) = |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
163 |
(cancel_group group Exn.Interrupt; |
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
164 |
(case job of |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
165 |
Running t => (insert eq_group group groups, insert Thread.equal t running) |
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
166 |
| _ => (groups, running))); |
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
167 |
val (running_groups, running) = Task_Graph.fold (cancel_job o #1 o #2) jobs ([], []); |
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
168 |
val _ = List.app SimpleThread.interrupt running; |
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
169 |
in running_groups end; |
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
170 |
|
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
171 |
|
28185
0f20cbce4935
simplified dequeue: provide Thread.self internally;
wenzelm
parents:
28184
diff
changeset
|
172 |
(* enqueue *) |
28165 | 173 |
|
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
174 |
fun enqueue_passive group (Queue {groups, jobs, cache}) = |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
175 |
let |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
176 |
val task = new_task NONE; |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
177 |
val groups' = groups |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
178 |
|> fold (fn gid => Inttab.cons_list (gid, task)) (group_ancestry group); |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
179 |
val jobs' = jobs |> Task_Graph.new_node (task, (group, Passive)); |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
180 |
in (task, make_queue groups' jobs' cache) end; |
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
181 |
|
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
182 |
fun enqueue group deps pri job (Queue {groups, jobs, cache}) = |
28165 | 183 |
let |
34277
7325a5e3587f
added Future.promise/fulfill -- promised futures that are fulfilled by external means;
wenzelm
parents:
32814
diff
changeset
|
184 |
val task = new_task (SOME pri); |
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
185 |
val groups' = groups |
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
186 |
|> fold (fn gid => Inttab.cons_list (gid, task)) (group_ancestry group); |
28185
0f20cbce4935
simplified dequeue: provide Thread.self internally;
wenzelm
parents:
28184
diff
changeset
|
187 |
val jobs' = jobs |
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
188 |
|> Task_Graph.new_node (task, (group, Job [job])) |
32190
4fc7a882b41e
enqueue: maintain transitive closure, which simplifies dequeue_towards;
wenzelm
parents:
32101
diff
changeset
|
189 |
|> fold (add_job task) deps |
4fc7a882b41e
enqueue: maintain transitive closure, which simplifies dequeue_towards;
wenzelm
parents:
32101
diff
changeset
|
190 |
|> fold (fold (add_job task) o get_deps jobs) deps; |
32218
222f26693757
enqueue/finish: return minimal/maximal state of this task;
wenzelm
parents:
32192
diff
changeset
|
191 |
val minimal = null (get_deps jobs' task); |
31632 | 192 |
val cache' = |
193 |
(case cache of |
|
194 |
Result last => |
|
195 |
if task_ord (last, task) = LESS |
|
196 |
then cache else Unknown |
|
197 |
| _ => Unknown); |
|
32218
222f26693757
enqueue/finish: return minimal/maximal state of this task;
wenzelm
parents:
32192
diff
changeset
|
198 |
in ((task, minimal), make_queue groups' jobs' cache') end; |
28165 | 199 |
|
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
200 |
fun extend task job (Queue {groups, jobs, cache}) = |
29365 | 201 |
(case try (get_job jobs) task of |
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
202 |
SOME (Job list) => SOME (make_queue groups (set_job task (Job (job :: list)) jobs) cache) |
29365 | 203 |
| _ => NONE); |
204 |
||
28185
0f20cbce4935
simplified dequeue: provide Thread.self internally;
wenzelm
parents:
28184
diff
changeset
|
205 |
|
0f20cbce4935
simplified dequeue: provide Thread.self internally;
wenzelm
parents:
28184
diff
changeset
|
206 |
(* dequeue *) |
0f20cbce4935
simplified dequeue: provide Thread.self internally;
wenzelm
parents:
28184
diff
changeset
|
207 |
|
32249 | 208 |
fun dequeue thread (queue as Queue {groups, jobs, cache}) = |
29121 | 209 |
let |
29365 | 210 |
fun ready (task, ((group, Job list), ([], _))) = SOME (task, group, rev list) |
29121 | 211 |
| ready _ = NONE; |
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
212 |
fun deq boundary = |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
213 |
(case Task_Graph.get_first boundary ready jobs of |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
214 |
NONE => (NONE, make_queue groups jobs No_Result) |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
215 |
| SOME (result as (task, _, _)) => |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
216 |
let |
32249 | 217 |
val jobs' = set_job task (Running thread) jobs; |
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
218 |
val cache' = Result task; |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
219 |
in (SOME result, make_queue groups jobs' cache') end); |
29121 | 220 |
in |
31617
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
221 |
(case cache of |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
222 |
Unknown => deq NONE |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
223 |
| Result last => deq (SOME last) |
bb7b5a5942c7
simplified join_results: no longer work "towards" deps, which simplifies task queue management and maintains strict bottom up discipline (without "transfer of priority" to required futures);
wenzelm
parents:
29365
diff
changeset
|
224 |
| No_Result => (NONE, queue)) |
28384
70abca69247b
dequeue_towards: return bound for unfinished tasks;
wenzelm
parents:
28332
diff
changeset
|
225 |
end; |
28202
23cb9a974630
added focus, which indicates a particular collection of high-priority tasks;
wenzelm
parents:
28196
diff
changeset
|
226 |
|
28165 | 227 |
|
32055
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
228 |
(* dequeue_towards -- adhoc dependencies *) |
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
229 |
|
32814
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
230 |
fun depend task deps (Queue {groups, jobs, ...}) = |
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
231 |
make_queue groups (fold (add_dep task) deps jobs) Unknown; |
81897d30b97f
added Task_Queue.depend (again) -- light-weight version for transitive graph;
wenzelm
parents:
32784
diff
changeset
|
232 |
|
32249 | 233 |
fun dequeue_towards thread deps (queue as Queue {groups, jobs, ...}) = |
32055
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
234 |
let |
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
235 |
fun ready task = |
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
236 |
(case Task_Graph.get_node jobs task of |
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
237 |
(group, Job list) => |
32250 | 238 |
if null (get_deps jobs task) |
32101
e25107ff4f56
support for nested groups -- cancellation is propagated to peers and subgroups;
wenzelm
parents:
32099
diff
changeset
|
239 |
then SOME (task, group, rev list) |
32055
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
240 |
else NONE |
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
241 |
| _ => NONE); |
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
242 |
val tasks = filter (can (Task_Graph.get_node jobs)) deps; |
32192 | 243 |
fun result (res as (task, _, _)) = |
244 |
let |
|
32249 | 245 |
val jobs' = set_job task (Running thread) jobs; |
32192 | 246 |
val cache' = Unknown; |
32224 | 247 |
in ((SOME res, tasks), make_queue groups jobs' cache') end; |
32055
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
248 |
in |
32093
30996b775a7f
tuned dequeu_towards: try immediate tasks before expensive all_preds;
wenzelm
parents:
32055
diff
changeset
|
249 |
(case get_first ready tasks of |
32192 | 250 |
SOME res => result res |
251 |
| NONE => |
|
32250 | 252 |
(case get_first (get_first ready o get_deps jobs) tasks of |
32192 | 253 |
SOME res => result res |
32224 | 254 |
| NONE => ((NONE, tasks), queue))) |
32055
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
255 |
end; |
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
256 |
|
6a46898aa805
recovered a version of dequeue_towards (cf. bb7b5a5942c7);
wenzelm
parents:
32052
diff
changeset
|
257 |
|
32221 | 258 |
(* finish *) |
259 |
||
260 |
fun finish task (Queue {groups, jobs, cache}) = |
|
261 |
let |
|
262 |
val group = get_group jobs task; |
|
263 |
val groups' = groups |
|
264 |
|> fold (fn gid => Inttab.remove_list (op =) (gid, task)) (group_ancestry group); |
|
265 |
val jobs' = Task_Graph.del_node task jobs; |
|
266 |
val maximal = null (Task_Graph.imm_succs jobs task); |
|
267 |
val cache' = if maximal then cache else Unknown; |
|
268 |
in (maximal, make_queue groups' jobs' cache') end; |
|
269 |
||
28165 | 270 |
end; |