1 |
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/* |
2 |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
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* Other contributors include John Vint |
6 |
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*/ |
7 |
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import junit.framework.*; |
9 |
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import java.util.ArrayList; |
10 |
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import java.util.List; |
11 |
< |
import java.util.concurrent.atomic.AtomicInteger; |
12 |
< |
import java.util.concurrent.atomic.AtomicBoolean; |
13 |
< |
import java.util.concurrent.*; |
11 |
> |
import java.util.concurrent.Phaser; |
12 |
> |
import java.util.concurrent.CountDownLatch; |
13 |
> |
import java.util.concurrent.TimeoutException; |
14 |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
15 |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
16 |
< |
import junit.framework.Test; |
17 |
< |
import junit.framework.TestSuite; |
16 |
> |
import java.util.concurrent.atomic.AtomicBoolean; |
17 |
> |
import java.util.concurrent.atomic.AtomicInteger; |
18 |
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|
19 |
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public class PhaserTest extends JSR166TestCase { |
20 |
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|
165 |
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} |
166 |
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|
167 |
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/** |
168 |
< |
* register() correctly returns the current barrier phase number when |
169 |
< |
* invoked |
168 |
> |
* register() correctly returns the current barrier phase number |
169 |
> |
* when invoked |
170 |
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*/ |
171 |
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public void testRegister3() { |
172 |
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Phaser phaser = new Phaser(); |
177 |
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} |
178 |
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|
179 |
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/** |
180 |
< |
* register causes the next arrive to not increment the phase rather retain |
181 |
< |
* the phase number |
180 |
> |
* register causes the next arrive to not increment the phase |
181 |
> |
* rather retain the phase number |
182 |
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*/ |
183 |
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public void testRegister4() { |
184 |
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Phaser phaser = new Phaser(1); |
189 |
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} |
190 |
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|
191 |
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/** |
192 |
+ |
* register on a subphaser that is currently empty succeeds, even |
193 |
+ |
* in the presence of another non-empty subphaser |
194 |
+ |
* XXXX broken (hangs) as of 2011-06-26 |
195 |
+ |
*/ |
196 |
+ |
public void XXXXtestRegisterEmptySubPhaser() { |
197 |
+ |
Phaser root = new Phaser(); |
198 |
+ |
Phaser child1 = new Phaser(root, 1); |
199 |
+ |
Phaser child2 = new Phaser(root, 0); |
200 |
+ |
assertEquals(0, child2.register()); |
201 |
+ |
assertEquals(0, child2.arriveAndDeregister()); |
202 |
+ |
assertEquals(0, child2.register()); |
203 |
+ |
assertEquals(0, child2.arriveAndDeregister()); |
204 |
+ |
assertState(child2, 0, 0, 0); |
205 |
+ |
} |
206 |
+ |
|
207 |
+ |
/** |
208 |
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* Invoking bulkRegister with a negative parameter throws an |
209 |
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* IllegalArgumentException |
210 |
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*/ |
216 |
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} |
217 |
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|
218 |
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/** |
219 |
< |
* bulkRegister should correctly record the number of unarrived parties with |
220 |
< |
* the number of parties being registered |
219 |
> |
* bulkRegister should correctly record the number of unarrived |
220 |
> |
* parties with the number of parties being registered |
221 |
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*/ |
222 |
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public void testBulkRegister2() { |
223 |
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Phaser phaser = new Phaser(); |
271 |
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/** |
272 |
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* arriveAndDeregister does not wait for others to arrive at barrier |
273 |
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*/ |
274 |
< |
public void testArriveAndDeregister() throws InterruptedException { |
274 |
> |
public void testArriveAndDeregister() { |
275 |
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final Phaser phaser = new Phaser(1); |
276 |
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for (int i = 0; i < 10; i++) { |
277 |
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assertState(phaser, 0, 1, 1); |
287 |
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/** |
288 |
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* arriveAndDeregister does not wait for others to arrive at barrier |
289 |
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*/ |
290 |
< |
public void testArrive2() throws InterruptedException { |
290 |
> |
public void testArrive2() { |
291 |
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final Phaser phaser = new Phaser(); |
292 |
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assertEquals(0, phaser.register()); |
293 |
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List<Thread> threads = new ArrayList<Thread>(); |
294 |
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for (int i = 0; i < 10; i++) { |
295 |
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assertEquals(0, phaser.register()); |
296 |
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threads.add(newStartedThread(new CheckedRunnable() { |
297 |
< |
public void realRun() throws InterruptedException { |
297 |
> |
public void realRun() { |
298 |
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assertEquals(0, phaser.arriveAndDeregister()); |
299 |
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}})); |
300 |
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} |
301 |
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|
302 |
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for (Thread thread : threads) |
303 |
< |
awaitTermination(thread, LONG_DELAY_MS); |
303 |
> |
awaitTermination(thread); |
304 |
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assertState(phaser, 0, 1, 1); |
305 |
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assertEquals(0, phaser.arrive()); |
306 |
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assertState(phaser, 1, 1, 1); |
404 |
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* arriveAndDeregister returns the phase in which it leaves the |
405 |
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* phaser in after deregistration |
406 |
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*/ |
407 |
< |
public void testArriveAndDeregister6() throws InterruptedException { |
407 |
> |
public void testArriveAndDeregister6() { |
408 |
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final Phaser phaser = new Phaser(2); |
409 |
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Thread t = newStartedThread(new CheckedRunnable() { |
410 |
|
public void realRun() { |
416 |
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assertState(phaser, 1, 1, 1); |
417 |
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assertEquals(1, phaser.arriveAndDeregister()); |
418 |
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assertTerminated(phaser, 2); |
419 |
< |
awaitTermination(t, SHORT_DELAY_MS); |
419 |
> |
awaitTermination(t); |
420 |
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} |
421 |
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|
422 |
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/** |
439 |
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} |
440 |
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|
441 |
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/** |
442 |
+ |
* awaitAdvanceInterruptibly blocks interruptibly |
443 |
+ |
*/ |
444 |
+ |
public void testAwaitAdvanceInterruptibly_interruptible() throws InterruptedException { |
445 |
+ |
final Phaser phaser = new Phaser(1); |
446 |
+ |
final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
447 |
+ |
|
448 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
449 |
+ |
public void realRun() { |
450 |
+ |
Thread.currentThread().interrupt(); |
451 |
+ |
try { |
452 |
+ |
phaser.awaitAdvanceInterruptibly(0); |
453 |
+ |
shouldThrow(); |
454 |
+ |
} catch (InterruptedException success) {} |
455 |
+ |
assertFalse(Thread.interrupted()); |
456 |
+ |
|
457 |
+ |
pleaseInterrupt.countDown(); |
458 |
+ |
try { |
459 |
+ |
phaser.awaitAdvanceInterruptibly(0); |
460 |
+ |
shouldThrow(); |
461 |
+ |
} catch (InterruptedException success) {} |
462 |
+ |
assertFalse(Thread.interrupted()); |
463 |
+ |
}}); |
464 |
+ |
|
465 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
466 |
+ |
public void realRun() throws TimeoutException { |
467 |
+ |
Thread.currentThread().interrupt(); |
468 |
+ |
try { |
469 |
+ |
phaser.awaitAdvanceInterruptibly(0, 2*LONG_DELAY_MS, MILLISECONDS); |
470 |
+ |
shouldThrow(); |
471 |
+ |
} catch (InterruptedException success) {} |
472 |
+ |
assertFalse(Thread.interrupted()); |
473 |
+ |
|
474 |
+ |
pleaseInterrupt.countDown(); |
475 |
+ |
try { |
476 |
+ |
phaser.awaitAdvanceInterruptibly(0, 2*LONG_DELAY_MS, MILLISECONDS); |
477 |
+ |
shouldThrow(); |
478 |
+ |
} catch (InterruptedException success) {} |
479 |
+ |
assertFalse(Thread.interrupted()); |
480 |
+ |
}}); |
481 |
+ |
|
482 |
+ |
await(pleaseInterrupt); |
483 |
+ |
assertState(phaser, 0, 1, 1); |
484 |
+ |
assertThreadsStayAlive(t1, t2); |
485 |
+ |
t1.interrupt(); |
486 |
+ |
t2.interrupt(); |
487 |
+ |
awaitTermination(t1); |
488 |
+ |
awaitTermination(t2); |
489 |
+ |
assertState(phaser, 0, 1, 1); |
490 |
+ |
assertEquals(0, phaser.arrive()); |
491 |
+ |
assertState(phaser, 1, 1, 1); |
492 |
+ |
} |
493 |
+ |
|
494 |
+ |
/** |
495 |
|
* awaitAdvance continues waiting if interrupted before waiting |
496 |
|
*/ |
497 |
< |
public void testAwaitAdvanceAfterInterrupt() throws InterruptedException { |
497 |
> |
public void testAwaitAdvanceAfterInterrupt() { |
498 |
|
final Phaser phaser = new Phaser(); |
499 |
|
assertEquals(0, phaser.register()); |
500 |
< |
final CountDownLatch threadStarted = new CountDownLatch(1); |
500 |
> |
final CountDownLatch pleaseArrive = new CountDownLatch(1); |
501 |
|
|
502 |
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Thread t = newStartedThread(new CheckedRunnable() { |
503 |
< |
public void realRun() throws InterruptedException { |
503 |
> |
public void realRun() { |
504 |
|
Thread.currentThread().interrupt(); |
505 |
|
assertEquals(0, phaser.register()); |
506 |
|
assertEquals(0, phaser.arrive()); |
507 |
< |
threadStarted.countDown(); |
507 |
> |
pleaseArrive.countDown(); |
508 |
|
assertTrue(Thread.currentThread().isInterrupted()); |
509 |
|
assertEquals(1, phaser.awaitAdvance(0)); |
510 |
< |
assertTrue(Thread.currentThread().isInterrupted()); |
510 |
> |
assertTrue(Thread.interrupted()); |
511 |
|
}}); |
512 |
|
|
513 |
< |
assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS)); |
514 |
< |
waitForThreadToEnterWaitState(t, SMALL_DELAY_MS); |
513 |
> |
await(pleaseArrive); |
514 |
> |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
515 |
|
assertEquals(0, phaser.arrive()); |
516 |
< |
awaitTermination(t, SMALL_DELAY_MS); |
516 |
> |
awaitTermination(t); |
517 |
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|
518 |
|
Thread.currentThread().interrupt(); |
519 |
|
assertEquals(1, phaser.awaitAdvance(0)); |
521 |
|
} |
522 |
|
|
523 |
|
/** |
524 |
< |
* awaitAdvance continues waiting if interrupted while waiting |
524 |
> |
* awaitAdvance continues waiting if interrupted while waiting |
525 |
|
*/ |
526 |
< |
public void testAwaitAdvanceBeforeInterrupt() throws InterruptedException { |
526 |
> |
public void testAwaitAdvanceBeforeInterrupt() { |
527 |
|
final Phaser phaser = new Phaser(); |
528 |
|
assertEquals(0, phaser.register()); |
529 |
< |
final CountDownLatch threadStarted = new CountDownLatch(1); |
529 |
> |
final CountDownLatch pleaseArrive = new CountDownLatch(1); |
530 |
|
|
531 |
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Thread t = newStartedThread(new CheckedRunnable() { |
532 |
< |
public void realRun() throws InterruptedException { |
532 |
> |
public void realRun() { |
533 |
|
assertEquals(0, phaser.register()); |
534 |
|
assertEquals(0, phaser.arrive()); |
465 |
– |
threadStarted.countDown(); |
535 |
|
assertFalse(Thread.currentThread().isInterrupted()); |
536 |
+ |
pleaseArrive.countDown(); |
537 |
|
assertEquals(1, phaser.awaitAdvance(0)); |
538 |
< |
assertTrue(Thread.currentThread().isInterrupted()); |
538 |
> |
assertTrue(Thread.interrupted()); |
539 |
|
}}); |
540 |
|
|
541 |
< |
assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS)); |
542 |
< |
waitForThreadToEnterWaitState(t, SMALL_DELAY_MS); |
541 |
> |
await(pleaseArrive); |
542 |
> |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
543 |
|
t.interrupt(); |
544 |
|
assertEquals(0, phaser.arrive()); |
545 |
< |
awaitTermination(t, SMALL_DELAY_MS); |
545 |
> |
awaitTermination(t); |
546 |
|
|
547 |
|
Thread.currentThread().interrupt(); |
548 |
|
assertEquals(1, phaser.awaitAdvance(0)); |
552 |
|
/** |
553 |
|
* arriveAndAwaitAdvance continues waiting if interrupted before waiting |
554 |
|
*/ |
555 |
< |
public void testArriveAndAwaitAdvanceAfterInterrupt() |
486 |
< |
throws InterruptedException { |
555 |
> |
public void testArriveAndAwaitAdvanceAfterInterrupt() { |
556 |
|
final Phaser phaser = new Phaser(); |
557 |
|
assertEquals(0, phaser.register()); |
558 |
< |
final CountDownLatch threadStarted = new CountDownLatch(1); |
558 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
559 |
|
|
560 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
561 |
< |
public void realRun() throws InterruptedException { |
561 |
> |
public void realRun() { |
562 |
|
Thread.currentThread().interrupt(); |
563 |
|
assertEquals(0, phaser.register()); |
564 |
< |
threadStarted.countDown(); |
564 |
> |
pleaseInterrupt.countDown(); |
565 |
|
assertTrue(Thread.currentThread().isInterrupted()); |
566 |
|
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
567 |
|
assertTrue(Thread.currentThread().isInterrupted()); |
568 |
|
}}); |
569 |
|
|
570 |
< |
assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS)); |
571 |
< |
waitForThreadToEnterWaitState(t, SMALL_DELAY_MS); |
570 |
> |
await(pleaseInterrupt); |
571 |
> |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
572 |
|
Thread.currentThread().interrupt(); |
573 |
|
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
574 |
|
assertTrue(Thread.interrupted()); |
575 |
< |
awaitTermination(t, SMALL_DELAY_MS); |
575 |
> |
awaitTermination(t); |
576 |
|
} |
577 |
|
|
578 |
|
/** |
579 |
|
* arriveAndAwaitAdvance continues waiting if interrupted while waiting |
580 |
|
*/ |
581 |
< |
public void testArriveAndAwaitAdvanceBeforeInterrupt() |
513 |
< |
throws InterruptedException { |
581 |
> |
public void testArriveAndAwaitAdvanceBeforeInterrupt() { |
582 |
|
final Phaser phaser = new Phaser(); |
583 |
|
assertEquals(0, phaser.register()); |
584 |
< |
final CountDownLatch threadStarted = new CountDownLatch(1); |
584 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
585 |
|
|
586 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
587 |
< |
public void realRun() throws InterruptedException { |
587 |
> |
public void realRun() { |
588 |
|
assertEquals(0, phaser.register()); |
521 |
– |
threadStarted.countDown(); |
589 |
|
assertFalse(Thread.currentThread().isInterrupted()); |
590 |
+ |
pleaseInterrupt.countDown(); |
591 |
|
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
592 |
|
assertTrue(Thread.currentThread().isInterrupted()); |
593 |
|
}}); |
594 |
|
|
595 |
< |
assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS)); |
596 |
< |
waitForThreadToEnterWaitState(t, SMALL_DELAY_MS); |
595 |
> |
await(pleaseInterrupt); |
596 |
> |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
597 |
|
t.interrupt(); |
598 |
|
Thread.currentThread().interrupt(); |
599 |
|
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
600 |
|
assertTrue(Thread.interrupted()); |
601 |
< |
awaitTermination(t, SMALL_DELAY_MS); |
601 |
> |
awaitTermination(t); |
602 |
|
} |
603 |
|
|
604 |
|
/** |
605 |
|
* awaitAdvance atomically waits for all parties within the same phase to |
606 |
|
* complete before continuing |
607 |
|
*/ |
608 |
< |
public void testAwaitAdvance4() throws InterruptedException { |
608 |
> |
public void testAwaitAdvance4() { |
609 |
|
final Phaser phaser = new Phaser(4); |
610 |
|
final AtomicInteger count = new AtomicInteger(0); |
611 |
|
List<Thread> threads = new ArrayList<Thread>(); |
621 |
|
}}})); |
622 |
|
|
623 |
|
for (Thread thread : threads) |
624 |
< |
awaitTermination(thread, MEDIUM_DELAY_MS); |
624 |
> |
awaitTermination(thread); |
625 |
|
} |
626 |
|
|
627 |
|
/** |
628 |
|
* awaitAdvance returns the current phase |
629 |
|
*/ |
630 |
< |
public void testAwaitAdvance5() throws InterruptedException { |
630 |
> |
public void testAwaitAdvance5() { |
631 |
|
final Phaser phaser = new Phaser(1); |
632 |
|
assertEquals(1, phaser.awaitAdvance(phaser.arrive())); |
633 |
|
assertEquals(1, phaser.getPhase()); |
637 |
|
final CountDownLatch latch = new CountDownLatch(1); |
638 |
|
final boolean goesFirst = ((i & 1) == 0); |
639 |
|
threads.add(newStartedThread(new CheckedRunnable() { |
640 |
< |
public void realRun() throws InterruptedException { |
640 |
> |
public void realRun() { |
641 |
|
if (goesFirst) |
642 |
|
latch.countDown(); |
643 |
|
else |
644 |
< |
assertTrue(latch.await(SMALL_DELAY_MS, MILLISECONDS)); |
644 |
> |
await(latch); |
645 |
|
phaser.arrive(); |
646 |
|
}})); |
647 |
|
if (goesFirst) |
648 |
< |
assertTrue(latch.await(SMALL_DELAY_MS, MILLISECONDS)); |
648 |
> |
await(latch); |
649 |
|
else |
650 |
|
latch.countDown(); |
651 |
|
assertEquals(i + 2, phaser.awaitAdvance(phaser.arrive())); |
652 |
|
assertEquals(i + 2, phaser.getPhase()); |
653 |
|
} |
654 |
|
for (Thread thread : threads) |
655 |
< |
awaitTermination(thread, SMALL_DELAY_MS); |
655 |
> |
awaitTermination(thread); |
656 |
|
} |
657 |
|
|
658 |
|
/** |
705 |
|
/** |
706 |
|
* awaitAdvance returns when the phaser is externally terminated |
707 |
|
*/ |
708 |
< |
public void testAwaitAdvance6() throws InterruptedException { |
708 |
> |
public void testAwaitAdvance6() { |
709 |
|
final Phaser phaser = new Phaser(3); |
710 |
< |
final CountDownLatch threadsStarted = new CountDownLatch(2); |
710 |
> |
final CountDownLatch pleaseForceTermination = new CountDownLatch(2); |
711 |
|
final List<Thread> threads = new ArrayList<Thread>(); |
712 |
|
for (int i = 0; i < 2; i++) { |
713 |
|
Runnable r = new CheckedRunnable() { |
714 |
|
public void realRun() { |
715 |
|
assertEquals(0, phaser.arrive()); |
716 |
< |
threadsStarted.countDown(); |
716 |
> |
pleaseForceTermination.countDown(); |
717 |
|
assertTrue(phaser.awaitAdvance(0) < 0); |
718 |
|
assertTrue(phaser.isTerminated()); |
719 |
|
assertTrue(phaser.getPhase() < 0); |
722 |
|
}}; |
723 |
|
threads.add(newStartedThread(r)); |
724 |
|
} |
725 |
< |
threadsStarted.await(); |
725 |
> |
await(pleaseForceTermination); |
726 |
|
phaser.forceTermination(); |
727 |
|
assertTrue(phaser.isTerminated()); |
728 |
|
assertEquals(0, phaser.getPhase() + Integer.MIN_VALUE); |
729 |
|
for (Thread thread : threads) |
730 |
< |
awaitTermination(thread, SMALL_DELAY_MS); |
730 |
> |
awaitTermination(thread); |
731 |
|
assertEquals(3, phaser.getRegisteredParties()); |
732 |
|
} |
733 |
|
|
748 |
|
* number of arrived parties is the same number that is accounted |
749 |
|
* for when the main thread awaitsAdvance |
750 |
|
*/ |
751 |
< |
public void testArriveAndAwaitAdvance3() throws InterruptedException { |
751 |
> |
public void testArriveAndAwaitAdvance3() { |
752 |
|
final Phaser phaser = new Phaser(1); |
753 |
|
final int THREADS = 3; |
754 |
< |
final CountDownLatch threadsStarted = new CountDownLatch(THREADS); |
754 |
> |
final CountDownLatch pleaseArrive = new CountDownLatch(THREADS); |
755 |
|
final List<Thread> threads = new ArrayList<Thread>(); |
756 |
|
for (int i = 0; i < THREADS; i++) |
757 |
|
threads.add(newStartedThread(new CheckedRunnable() { |
758 |
< |
public void realRun() throws InterruptedException { |
758 |
> |
public void realRun() { |
759 |
|
assertEquals(0, phaser.register()); |
760 |
< |
threadsStarted.countDown(); |
760 |
> |
pleaseArrive.countDown(); |
761 |
|
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
762 |
|
}})); |
763 |
|
|
764 |
< |
assertTrue(threadsStarted.await(MEDIUM_DELAY_MS, MILLISECONDS)); |
765 |
< |
long t0 = System.nanoTime(); |
764 |
> |
await(pleaseArrive); |
765 |
> |
long startTime = System.nanoTime(); |
766 |
|
while (phaser.getArrivedParties() < THREADS) |
767 |
|
Thread.yield(); |
768 |
|
assertEquals(THREADS, phaser.getArrivedParties()); |
769 |
< |
assertTrue(NANOSECONDS.toMillis(System.nanoTime() - t0) < SMALL_DELAY_MS); |
769 |
> |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
770 |
> |
for (Thread thread : threads) |
771 |
> |
waitForThreadToEnterWaitState(thread, SHORT_DELAY_MS); |
772 |
|
for (Thread thread : threads) |
773 |
|
assertTrue(thread.isAlive()); |
774 |
|
assertState(phaser, 0, THREADS + 1, 1); |
775 |
|
phaser.arriveAndAwaitAdvance(); |
776 |
|
for (Thread thread : threads) |
777 |
< |
awaitTermination(thread, SMALL_DELAY_MS); |
777 |
> |
awaitTermination(thread); |
778 |
|
assertState(phaser, 1, THREADS + 1, THREADS + 1); |
779 |
|
} |
780 |
|
|