267 |
|
} |
268 |
|
|
269 |
|
/** |
270 |
– |
* Possibly blocks until task is done or interrupted or timed out. |
271 |
– |
* |
272 |
– |
* @param interruptible true if wait can be cancelled by interrupt |
273 |
– |
* @param deadline if non-zero use timed waits and possibly timeout |
274 |
– |
* @param pool current pool if known |
275 |
– |
* @param uncompensate if true uncompensate after unblocking |
276 |
– |
* @return status on exit, or ABNORMAL if interrupted while waiting |
277 |
– |
*/ |
278 |
– |
private int awaitDone(boolean interruptible, long deadline, |
279 |
– |
ForkJoinPool pool, boolean uncompensate) { |
280 |
– |
int s; |
281 |
– |
boolean interrupted = false, queued = false, parked = false, fail = false; |
282 |
– |
Aux node = null; |
283 |
– |
while ((s = status) >= 0) { |
284 |
– |
Aux a; long ns; |
285 |
– |
if (fail || (fail = (pool != null && pool.mode < 0))) |
286 |
– |
casStatus(s, s | (DONE | ABNORMAL)); // try to cancel |
287 |
– |
else if (parked && Thread.interrupted()) { |
288 |
– |
if (interruptible) { |
289 |
– |
s = ABNORMAL; |
290 |
– |
break; |
291 |
– |
} |
292 |
– |
interrupted = true; |
293 |
– |
} |
294 |
– |
else if (queued) { |
295 |
– |
if (deadline != 0L) { |
296 |
– |
if ((ns = deadline - System.nanoTime()) <= 0L) |
297 |
– |
break; |
298 |
– |
LockSupport.parkNanos(ns); |
299 |
– |
} |
300 |
– |
else |
301 |
– |
LockSupport.park(); |
302 |
– |
parked = true; |
303 |
– |
} |
304 |
– |
else if (node != null) { |
305 |
– |
if ((a = aux) != null && a.ex != null) |
306 |
– |
Thread.onSpinWait(); // exception in progress |
307 |
– |
else if (queued = casAux(node.next = a, node)) |
308 |
– |
LockSupport.setCurrentBlocker(this); |
309 |
– |
} |
310 |
– |
else { |
311 |
– |
try { |
312 |
– |
node = new Aux(Thread.currentThread(), null); |
313 |
– |
} catch (Throwable ex) { // cannot create |
314 |
– |
fail = true; |
315 |
– |
} |
316 |
– |
} |
317 |
– |
} |
318 |
– |
if (pool != null && uncompensate) |
319 |
– |
pool.uncompensate(); |
320 |
– |
|
321 |
– |
if (queued) { |
322 |
– |
LockSupport.setCurrentBlocker(null); |
323 |
– |
if (s >= 0) { // cancellation similar to AbstractQueuedSynchronizer |
324 |
– |
outer: for (Aux a; (a = aux) != null && a.ex == null; ) { |
325 |
– |
for (Aux trail = null;;) { |
326 |
– |
Aux next = a.next; |
327 |
– |
if (a == node) { |
328 |
– |
if (trail != null) |
329 |
– |
trail.casNext(trail, next); |
330 |
– |
else if (casAux(a, next)) |
331 |
– |
break outer; // cannot be re-encountered |
332 |
– |
break; // restart |
333 |
– |
} else { |
334 |
– |
trail = a; |
335 |
– |
if ((a = next) == null) |
336 |
– |
break outer; |
337 |
– |
} |
338 |
– |
} |
339 |
– |
} |
340 |
– |
} |
341 |
– |
else { |
342 |
– |
signalWaiters(); // help clean or signal |
343 |
– |
if (interrupted) |
344 |
– |
Thread.currentThread().interrupt(); |
345 |
– |
} |
346 |
– |
} |
347 |
– |
return s; |
348 |
– |
} |
349 |
– |
|
350 |
– |
/** |
270 |
|
* Sets DONE status and wakes up threads waiting to join this task. |
271 |
|
* @return status on exit |
272 |
|
*/ |
356 |
|
* Helps and/or waits for completion from join, get, or invoke; |
357 |
|
* called from either internal or external threads. |
358 |
|
* |
359 |
< |
* @param submittedPool if nonnull, known externally submitted pool |
359 |
> |
* @param pool if nonnull, known submitted pool, else assumes current pool |
360 |
|
* @param ran true if task known to have been exec'd |
361 |
|
* @param interruptible true if park interruptibly when external |
362 |
|
* @param timed true if use timed wait |
363 |
|
* @param nanos if timed, timeout value |
364 |
|
* @return ABNORMAL if interrupted, else status on exit |
365 |
|
*/ |
366 |
< |
private int awaitJoin(ForkJoinPool submittedPool, boolean ran, |
366 |
> |
private int awaitDone(ForkJoinPool pool, boolean ran, |
367 |
|
boolean interruptible, boolean timed, |
368 |
|
long nanos) { |
369 |
< |
boolean internal; ForkJoinPool p, hostPool; |
370 |
< |
ForkJoinPool.WorkQueue q; int s; |
371 |
< |
Thread t; ForkJoinWorkerThread wt; |
372 |
< |
if (internal = ((t = Thread.currentThread()) |
373 |
< |
instanceof ForkJoinWorkerThread)) { |
374 |
< |
p = (wt = (ForkJoinWorkerThread)t).pool; |
375 |
< |
q = wt.workQueue; |
376 |
< |
if (submittedPool == null) |
377 |
< |
submittedPool = p; |
459 |
< |
else if (submittedPool != p) |
460 |
< |
internal = false; |
369 |
> |
ForkJoinPool p; boolean internal; int s; Thread t; |
370 |
> |
ForkJoinPool.WorkQueue q = null; |
371 |
> |
if ((t = Thread.currentThread()) instanceof ForkJoinWorkerThread) { |
372 |
> |
ForkJoinWorkerThread wt = (ForkJoinWorkerThread)t; |
373 |
> |
p = wt.pool; |
374 |
> |
if (pool == null) |
375 |
> |
pool = p; |
376 |
> |
if (internal = (pool == p)) |
377 |
> |
q = wt.workQueue; |
378 |
|
} |
379 |
|
else { |
380 |
+ |
internal = false; |
381 |
|
p = ForkJoinPool.common; |
382 |
< |
q = ForkJoinPool.commonQueue(); |
383 |
< |
if (interruptible && Thread.interrupted()) |
384 |
< |
return ABNORMAL; |
382 |
> |
if (pool == null) |
383 |
> |
pool = p; |
384 |
> |
if (pool == p && p != null) |
385 |
> |
q = p.externalQueue(); |
386 |
|
} |
387 |
+ |
if (interruptible && Thread.interrupted()) |
388 |
+ |
return ABNORMAL; |
389 |
|
if ((s = status) < 0) |
390 |
|
return s; |
391 |
|
long deadline = 0L; |
396 |
|
deadline = 1L; |
397 |
|
} |
398 |
|
boolean uncompensate = false; |
399 |
< |
// try helping unless timed, external, and pool has workers |
400 |
< |
if (q != null && p != null && |
401 |
< |
(internal || !timed || (p.mode & SMASK) == 0)) { |
402 |
< |
if (this instanceof CountedCompleter) |
403 |
< |
s = p.helpComplete(this, q, internal); |
404 |
< |
else if (!ran && |
405 |
< |
(!internal && q.externalTryUnpush(this)) || |
406 |
< |
q.tryRemove(this, internal)) |
407 |
< |
s = doExec(); |
408 |
< |
else |
409 |
< |
s = status; |
410 |
< |
if (s < 0) |
411 |
< |
return s; |
491 |
< |
else if (internal) { |
492 |
< |
if ((s = p.helpJoin(this, q)) < 0) |
399 |
> |
if (q != null && p != null) { // try helping |
400 |
> |
// help even in timed mode if pool has no parallelism |
401 |
> |
boolean canHelp = !timed || (p.mode & SMASK) == 0; |
402 |
> |
if (canHelp) { |
403 |
> |
if ((this instanceof CountedCompleter) && |
404 |
> |
(s = p.helpComplete(this, q, internal)) < 0) |
405 |
> |
return s; |
406 |
> |
if (!ran && ((!internal && q.externalTryUnpush(this)) || |
407 |
> |
q.tryRemove(this, internal)) && (s = doExec()) < 0) |
408 |
> |
return s; |
409 |
> |
} |
410 |
> |
if (internal) { |
411 |
> |
if ((s = p.helpJoin(this, q, canHelp)) < 0) |
412 |
|
return s; |
413 |
|
if (s == UNCOMPENSATE) |
414 |
|
uncompensate = true; |
496 |
– |
interruptible = false; |
415 |
|
} |
416 |
|
} |
417 |
< |
return awaitDone(interruptible, deadline, submittedPool, uncompensate); |
417 |
> |
// block until done or cancelled wait |
418 |
> |
boolean interrupted = false, queued = false; |
419 |
> |
boolean parked = false, fail = false; |
420 |
> |
Aux node = null; |
421 |
> |
while ((s = status) >= 0) { |
422 |
> |
Aux a; long ns; |
423 |
> |
if (fail || (fail = (pool != null && pool.mode < 0))) |
424 |
> |
casStatus(s, s | (DONE | ABNORMAL)); // try to cancel |
425 |
> |
else if (parked && Thread.interrupted()) { |
426 |
> |
if (interruptible) { |
427 |
> |
s = ABNORMAL; |
428 |
> |
break; |
429 |
> |
} |
430 |
> |
interrupted = true; |
431 |
> |
} |
432 |
> |
else if (queued) { |
433 |
> |
if (deadline != 0L) { |
434 |
> |
if ((ns = deadline - System.nanoTime()) <= 0L) |
435 |
> |
break; |
436 |
> |
LockSupport.parkNanos(ns); |
437 |
> |
} |
438 |
> |
else |
439 |
> |
LockSupport.park(); |
440 |
> |
parked = true; |
441 |
> |
} |
442 |
> |
else if (node != null) { |
443 |
> |
if ((a = aux) != null && a.ex != null) |
444 |
> |
Thread.onSpinWait(); // exception in progress |
445 |
> |
else if (queued = casAux(node.next = a, node)) |
446 |
> |
LockSupport.setCurrentBlocker(this); |
447 |
> |
} |
448 |
> |
else { |
449 |
> |
try { |
450 |
> |
node = new Aux(Thread.currentThread(), null); |
451 |
> |
} catch (Throwable ex) { // cannot create |
452 |
> |
fail = true; |
453 |
> |
} |
454 |
> |
} |
455 |
> |
} |
456 |
> |
if (pool != null && uncompensate) |
457 |
> |
pool.uncompensate(); |
458 |
> |
|
459 |
> |
if (queued) { |
460 |
> |
LockSupport.setCurrentBlocker(null); |
461 |
> |
if (s >= 0) { // cancellation similar to AbstractQueuedSynchronizer |
462 |
> |
outer: for (Aux a; (a = aux) != null && a.ex == null; ) { |
463 |
> |
for (Aux trail = null;;) { |
464 |
> |
Aux next = a.next; |
465 |
> |
if (a == node) { |
466 |
> |
if (trail != null) |
467 |
> |
trail.casNext(trail, next); |
468 |
> |
else if (casAux(a, next)) |
469 |
> |
break outer; // cannot be re-encountered |
470 |
> |
break; // restart |
471 |
> |
} else { |
472 |
> |
trail = a; |
473 |
> |
if ((a = next) == null) |
474 |
> |
break outer; |
475 |
> |
} |
476 |
> |
} |
477 |
> |
} |
478 |
> |
} |
479 |
> |
else { |
480 |
> |
signalWaiters(); // help clean or signal |
481 |
> |
if (interrupted) |
482 |
> |
Thread.currentThread().interrupt(); |
483 |
> |
} |
484 |
> |
} |
485 |
> |
return s; |
486 |
|
} |
487 |
|
|
488 |
|
/** |
638 |
|
public final V join() { |
639 |
|
int s; |
640 |
|
if ((s = status) >= 0) |
641 |
< |
s = awaitJoin(null, false, false, false, 0L); |
641 |
> |
s = awaitDone(null, false, false, false, 0L); |
642 |
|
if ((s & ABNORMAL) != 0) |
643 |
|
reportException(s); |
644 |
|
return getRawResult(); |
655 |
|
public final V invoke() { |
656 |
|
int s; |
657 |
|
if ((s = doExec()) >= 0) |
658 |
< |
s = awaitJoin(null, true, false, false, 0L); |
658 |
> |
s = awaitDone(null, true, false, false, 0L); |
659 |
|
if ((s & ABNORMAL) != 0) |
660 |
|
reportException(s); |
661 |
|
return getRawResult(); |
684 |
|
throw new NullPointerException(); |
685 |
|
t2.fork(); |
686 |
|
if ((s1 = t1.doExec()) >= 0) |
687 |
< |
s1 = t1.awaitJoin(null, true, false, false, 0L); |
687 |
> |
s1 = t1.awaitDone(null, true, false, false, 0L); |
688 |
|
if ((s1 & ABNORMAL) != 0) { |
689 |
|
cancelIgnoringExceptions(t2); |
690 |
|
t1.reportException(s1); |
691 |
|
} |
692 |
< |
else if (((s2 = t2.awaitJoin(null, false, false, false, 0L)) & ABNORMAL) != 0) |
692 |
> |
else if (((s2 = t2.awaitDone(null, false, false, false, 0L)) & ABNORMAL) != 0) |
693 |
|
t2.reportException(s2); |
694 |
|
} |
695 |
|
|
720 |
|
if (i == 0) { |
721 |
|
int s; |
722 |
|
if ((s = t.doExec()) >= 0) |
723 |
< |
s = t.awaitJoin(null, true, false, false, 0L); |
723 |
> |
s = t.awaitDone(null, true, false, false, 0L); |
724 |
|
if ((s & ABNORMAL) != 0) |
725 |
|
ex = t.getException(s); |
726 |
|
break; |
733 |
|
if ((t = tasks[i]) != null) { |
734 |
|
int s; |
735 |
|
if ((s = t.status) >= 0) |
736 |
< |
s = t.awaitJoin(null, false, false, false, 0L); |
736 |
> |
s = t.awaitDone(null, false, false, false, 0L); |
737 |
|
if ((s & ABNORMAL) != 0 && (ex = t.getException(s)) != null) |
738 |
|
break; |
739 |
|
} |
783 |
|
if (i == 0) { |
784 |
|
int s; |
785 |
|
if ((s = t.doExec()) >= 0) |
786 |
< |
s = t.awaitJoin(null, true, false, false, 0L); |
786 |
> |
s = t.awaitDone(null, true, false, false, 0L); |
787 |
|
if ((s & ABNORMAL) != 0) |
788 |
|
ex = t.getException(s); |
789 |
|
break; |
796 |
|
if ((t = ts.get(i)) != null) { |
797 |
|
int s; |
798 |
|
if ((s = t.status) >= 0) |
799 |
< |
s = t.awaitJoin(null, false, false, false, 0L); |
799 |
> |
s = t.awaitDone(null, false, false, false, 0L); |
800 |
|
if ((s & ABNORMAL) != 0 && (ex = t.getException(s)) != null) |
801 |
|
break; |
802 |
|
} |
947 |
|
* member of a ForkJoinPool and was interrupted while waiting |
948 |
|
*/ |
949 |
|
public final V get() throws InterruptedException, ExecutionException { |
950 |
< |
int s = awaitJoin(null, false, true, false, 0L); |
950 |
> |
int s = awaitDone(null, false, true, false, 0L); |
951 |
|
if ((s & ABNORMAL) != 0) |
952 |
|
reportExecutionException(s); |
953 |
|
return getRawResult(); |
970 |
|
public final V get(long timeout, TimeUnit unit) |
971 |
|
throws InterruptedException, ExecutionException, TimeoutException { |
972 |
|
long nanos = unit.toNanos(timeout); |
973 |
< |
int s = awaitJoin(null, false, true, true, nanos); |
973 |
> |
int s = awaitDone(null, false, true, true, nanos); |
974 |
|
if (s >= 0 || (s & ABNORMAL) != 0) |
975 |
|
reportExecutionException(s); |
976 |
|
return getRawResult(); |
984 |
|
*/ |
985 |
|
public final void quietlyJoin() { |
986 |
|
if (status >= 0) |
987 |
< |
awaitJoin(null, false, false, false, 0L); |
987 |
> |
awaitDone(null, false, false, false, 0L); |
988 |
|
} |
989 |
|
|
990 |
|
|
995 |
|
*/ |
996 |
|
public final void quietlyInvoke() { |
997 |
|
if (doExec() >= 0) |
998 |
< |
awaitJoin(null, true, false, false, 0L); |
998 |
> |
awaitDone(null, true, false, false, 0L); |
999 |
|
} |
1000 |
|
|
1001 |
|
// Versions of join/get for pool.invoke* methods that use external, |
1002 |
|
// possibly-non-commonPool submits |
1003 |
|
|
1004 |
+ |
final void awaitPoolInvoke(ForkJoinPool pool) { |
1005 |
+ |
awaitDone(pool, false, false, false, 0L); |
1006 |
+ |
} |
1007 |
+ |
final void awaitPoolInvoke(ForkJoinPool pool, long nanos) { |
1008 |
+ |
awaitDone(pool, false, true, true, nanos); |
1009 |
+ |
} |
1010 |
|
final V joinForPoolInvoke(ForkJoinPool pool) { |
1011 |
< |
int s; |
1020 |
< |
if ((s = status) >= 0) |
1021 |
< |
s = awaitJoin(pool, false, false, false, 0L); |
1011 |
> |
int s = awaitDone(pool, false, false, false, 0L); |
1012 |
|
if ((s & ABNORMAL) != 0) |
1013 |
|
reportException(s); |
1014 |
|
return getRawResult(); |
1015 |
|
} |
1026 |
– |
final void tryJoinForPoolInvoke(ForkJoinPool pool) { |
1027 |
– |
if (status >= 0) |
1028 |
– |
awaitJoin(pool, false, false, false, 0L); |
1029 |
– |
} |
1016 |
|
final V getForPoolInvoke(ForkJoinPool pool) |
1017 |
|
throws InterruptedException, ExecutionException { |
1018 |
< |
int s = awaitJoin(pool, false, true, false, 0L); |
1018 |
> |
int s = awaitDone(pool, false, true, false, 0L); |
1019 |
|
if ((s & ABNORMAL) != 0) |
1020 |
|
reportExecutionException(s); |
1021 |
|
return getRawResult(); |
1022 |
|
} |
1037 |
– |
|
1023 |
|
final V getForPoolInvoke(ForkJoinPool pool, long nanos) |
1024 |
|
throws InterruptedException, ExecutionException, TimeoutException { |
1025 |
< |
int s = awaitJoin(pool, false, true, true, nanos); |
1025 |
> |
int s = awaitDone(pool, false, true, true, nanos); |
1026 |
|
if (s >= 0 || (s & ABNORMAL) != 0) |
1027 |
|
reportExecutionException(s); |
1028 |
|
return getRawResult(); |