1 |
/* |
2 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
* Expert Group and released to the public domain, as explained at |
4 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
* Other contributors include John Vint |
6 |
*/ |
7 |
|
8 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
9 |
|
10 |
import java.util.ArrayList; |
11 |
import java.util.List; |
12 |
import java.util.concurrent.CountDownLatch; |
13 |
import java.util.concurrent.Phaser; |
14 |
import java.util.concurrent.TimeoutException; |
15 |
import java.util.concurrent.atomic.AtomicInteger; |
16 |
|
17 |
import junit.framework.Test; |
18 |
import junit.framework.TestSuite; |
19 |
|
20 |
public class PhaserTest extends JSR166TestCase { |
21 |
|
22 |
public static void main(String[] args) { |
23 |
junit.textui.TestRunner.run(suite()); |
24 |
} |
25 |
|
26 |
public static Test suite() { |
27 |
return new TestSuite(PhaserTest.class); |
28 |
} |
29 |
|
30 |
private static final int maxParties = 65535; |
31 |
|
32 |
/** Checks state of unterminated phaser. */ |
33 |
protected void assertState(Phaser phaser, |
34 |
int phase, int parties, int unarrived) { |
35 |
assertEquals(phase, phaser.getPhase()); |
36 |
assertEquals(parties, phaser.getRegisteredParties()); |
37 |
assertEquals(unarrived, phaser.getUnarrivedParties()); |
38 |
assertEquals(parties - unarrived, phaser.getArrivedParties()); |
39 |
assertFalse(phaser.isTerminated()); |
40 |
} |
41 |
|
42 |
/** Checks state of terminated phaser. */ |
43 |
protected void assertTerminated(Phaser phaser, int maxPhase, int parties) { |
44 |
assertTrue(phaser.isTerminated()); |
45 |
int expectedPhase = maxPhase + Integer.MIN_VALUE; |
46 |
assertEquals(expectedPhase, phaser.getPhase()); |
47 |
assertEquals(parties, phaser.getRegisteredParties()); |
48 |
assertEquals(expectedPhase, phaser.register()); |
49 |
assertEquals(expectedPhase, phaser.arrive()); |
50 |
assertEquals(expectedPhase, phaser.arriveAndDeregister()); |
51 |
} |
52 |
|
53 |
protected void assertTerminated(Phaser phaser, int maxPhase) { |
54 |
assertTerminated(phaser, maxPhase, 0); |
55 |
} |
56 |
|
57 |
/** |
58 |
* Empty constructor builds a new Phaser with no parent, no registered |
59 |
* parties and initial phase number of 0 |
60 |
*/ |
61 |
public void testConstructorDefaultValues() { |
62 |
Phaser phaser = new Phaser(); |
63 |
assertNull(phaser.getParent()); |
64 |
assertEquals(0, phaser.getRegisteredParties()); |
65 |
assertEquals(0, phaser.getArrivedParties()); |
66 |
assertEquals(0, phaser.getUnarrivedParties()); |
67 |
assertEquals(0, phaser.getPhase()); |
68 |
} |
69 |
|
70 |
/** |
71 |
* Constructing with a negative number of parties throws |
72 |
* IllegalArgumentException |
73 |
*/ |
74 |
public void testConstructorNegativeParties() { |
75 |
try { |
76 |
new Phaser(-1); |
77 |
shouldThrow(); |
78 |
} catch (IllegalArgumentException success) {} |
79 |
} |
80 |
|
81 |
/** |
82 |
* Constructing with a negative number of parties throws |
83 |
* IllegalArgumentException |
84 |
*/ |
85 |
public void testConstructorNegativeParties2() { |
86 |
try { |
87 |
new Phaser(new Phaser(), -1); |
88 |
shouldThrow(); |
89 |
} catch (IllegalArgumentException success) {} |
90 |
} |
91 |
|
92 |
/** |
93 |
* Constructing with a number of parties > 65535 throws |
94 |
* IllegalArgumentException |
95 |
*/ |
96 |
public void testConstructorPartiesExceedsLimit() { |
97 |
new Phaser(maxParties); |
98 |
try { |
99 |
new Phaser(maxParties + 1); |
100 |
shouldThrow(); |
101 |
} catch (IllegalArgumentException success) {} |
102 |
|
103 |
new Phaser(new Phaser(), maxParties); |
104 |
try { |
105 |
new Phaser(new Phaser(), maxParties + 1); |
106 |
shouldThrow(); |
107 |
} catch (IllegalArgumentException success) {} |
108 |
} |
109 |
|
110 |
/** |
111 |
* The parent provided to the constructor should be returned from |
112 |
* a later call to getParent |
113 |
*/ |
114 |
public void testConstructor3() { |
115 |
Phaser parent = new Phaser(); |
116 |
assertSame(parent, new Phaser(parent).getParent()); |
117 |
assertNull(new Phaser(null).getParent()); |
118 |
} |
119 |
|
120 |
/** |
121 |
* The parent being input into the parameter should equal the original |
122 |
* parent when being returned |
123 |
*/ |
124 |
public void testConstructor5() { |
125 |
Phaser parent = new Phaser(); |
126 |
assertSame(parent, new Phaser(parent, 0).getParent()); |
127 |
assertNull(new Phaser(null, 0).getParent()); |
128 |
} |
129 |
|
130 |
/** |
131 |
* register() will increment the number of unarrived parties by |
132 |
* one and not affect its arrived parties |
133 |
*/ |
134 |
public void testRegister1() { |
135 |
Phaser phaser = new Phaser(); |
136 |
assertState(phaser, 0, 0, 0); |
137 |
assertEquals(0, phaser.register()); |
138 |
assertState(phaser, 0, 1, 1); |
139 |
} |
140 |
|
141 |
/** |
142 |
* Registering more than 65536 parties causes IllegalStateException |
143 |
*/ |
144 |
public void testRegister2() { |
145 |
Phaser phaser = new Phaser(0); |
146 |
assertState(phaser, 0, 0, 0); |
147 |
assertEquals(0, phaser.bulkRegister(maxParties - 10)); |
148 |
assertState(phaser, 0, maxParties - 10, maxParties - 10); |
149 |
for (int i = 0; i < 10; i++) { |
150 |
assertState(phaser, 0, maxParties - 10 + i, maxParties - 10 + i); |
151 |
assertEquals(0, phaser.register()); |
152 |
} |
153 |
assertState(phaser, 0, maxParties, maxParties); |
154 |
try { |
155 |
phaser.register(); |
156 |
shouldThrow(); |
157 |
} catch (IllegalStateException success) {} |
158 |
|
159 |
try { |
160 |
phaser.bulkRegister(Integer.MAX_VALUE); |
161 |
shouldThrow(); |
162 |
} catch (IllegalStateException success) {} |
163 |
|
164 |
assertEquals(0, phaser.bulkRegister(0)); |
165 |
assertState(phaser, 0, maxParties, maxParties); |
166 |
} |
167 |
|
168 |
/** |
169 |
* register() correctly returns the current barrier phase number |
170 |
* when invoked |
171 |
*/ |
172 |
public void testRegister3() { |
173 |
Phaser phaser = new Phaser(); |
174 |
assertEquals(0, phaser.register()); |
175 |
assertEquals(0, phaser.arrive()); |
176 |
assertEquals(1, phaser.register()); |
177 |
assertState(phaser, 1, 2, 2); |
178 |
} |
179 |
|
180 |
/** |
181 |
* register causes the next arrive to not increment the phase |
182 |
* rather retain the phase number |
183 |
*/ |
184 |
public void testRegister4() { |
185 |
Phaser phaser = new Phaser(1); |
186 |
assertEquals(0, phaser.arrive()); |
187 |
assertEquals(1, phaser.register()); |
188 |
assertEquals(1, phaser.arrive()); |
189 |
assertState(phaser, 1, 2, 1); |
190 |
} |
191 |
|
192 |
/** |
193 |
* register on a subphaser that is currently empty succeeds, even |
194 |
* in the presence of another non-empty subphaser |
195 |
*/ |
196 |
public void testRegisterEmptySubPhaser() { |
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 |
assertState(root, 0, 2, 2); |
202 |
assertState(child1, 0, 1, 1); |
203 |
assertState(child2, 0, 1, 1); |
204 |
assertEquals(0, child2.arriveAndDeregister()); |
205 |
assertState(root, 0, 1, 1); |
206 |
assertState(child1, 0, 1, 1); |
207 |
assertState(child2, 0, 0, 0); |
208 |
assertEquals(0, child2.register()); |
209 |
assertEquals(0, child2.arriveAndDeregister()); |
210 |
assertState(root, 0, 1, 1); |
211 |
assertState(child1, 0, 1, 1); |
212 |
assertState(child2, 0, 0, 0); |
213 |
assertEquals(0, child1.arriveAndDeregister()); |
214 |
assertTerminated(root, 1); |
215 |
assertTerminated(child1, 1); |
216 |
assertTerminated(child2, 1); |
217 |
} |
218 |
|
219 |
/** |
220 |
* Invoking bulkRegister with a negative parameter throws an |
221 |
* IllegalArgumentException |
222 |
*/ |
223 |
public void testBulkRegister1() { |
224 |
try { |
225 |
new Phaser().bulkRegister(-1); |
226 |
shouldThrow(); |
227 |
} catch (IllegalArgumentException success) {} |
228 |
} |
229 |
|
230 |
/** |
231 |
* bulkRegister should correctly record the number of unarrived |
232 |
* parties with the number of parties being registered |
233 |
*/ |
234 |
public void testBulkRegister2() { |
235 |
Phaser phaser = new Phaser(); |
236 |
assertEquals(0, phaser.bulkRegister(0)); |
237 |
assertState(phaser, 0, 0, 0); |
238 |
assertEquals(0, phaser.bulkRegister(20)); |
239 |
assertState(phaser, 0, 20, 20); |
240 |
} |
241 |
|
242 |
/** |
243 |
* Registering with a number of parties greater than or equal to 1<<16 |
244 |
* throws IllegalStateException. |
245 |
*/ |
246 |
public void testBulkRegister3() { |
247 |
assertEquals(0, new Phaser().bulkRegister((1 << 16) - 1)); |
248 |
|
249 |
try { |
250 |
new Phaser().bulkRegister(1 << 16); |
251 |
shouldThrow(); |
252 |
} catch (IllegalStateException success) {} |
253 |
|
254 |
try { |
255 |
new Phaser(2).bulkRegister((1 << 16) - 2); |
256 |
shouldThrow(); |
257 |
} catch (IllegalStateException success) {} |
258 |
} |
259 |
|
260 |
/** |
261 |
* the phase number increments correctly when tripping the barrier |
262 |
*/ |
263 |
public void testPhaseIncrement1() { |
264 |
for (int size = 1; size < nine; size++) { |
265 |
final Phaser phaser = new Phaser(size); |
266 |
for (int index = 0; index <= (1 << size); index++) { |
267 |
int phase = phaser.arrive(); |
268 |
assertTrue(index % size == 0 ? (index / size) == phase : index - (phase * size) > 0); |
269 |
} |
270 |
} |
271 |
} |
272 |
|
273 |
/** |
274 |
* arrive() on a registered phaser increments phase. |
275 |
*/ |
276 |
public void testArrive1() { |
277 |
Phaser phaser = new Phaser(1); |
278 |
assertState(phaser, 0, 1, 1); |
279 |
assertEquals(0, phaser.arrive()); |
280 |
assertState(phaser, 1, 1, 1); |
281 |
} |
282 |
|
283 |
/** |
284 |
* arriveAndDeregister does not wait for others to arrive at barrier |
285 |
*/ |
286 |
public void testArriveAndDeregister() { |
287 |
final Phaser phaser = new Phaser(1); |
288 |
for (int i = 0; i < 10; i++) { |
289 |
assertState(phaser, 0, 1, 1); |
290 |
assertEquals(0, phaser.register()); |
291 |
assertState(phaser, 0, 2, 2); |
292 |
assertEquals(0, phaser.arriveAndDeregister()); |
293 |
assertState(phaser, 0, 1, 1); |
294 |
} |
295 |
assertEquals(0, phaser.arriveAndDeregister()); |
296 |
assertTerminated(phaser, 1); |
297 |
} |
298 |
|
299 |
/** |
300 |
* arriveAndDeregister does not wait for others to arrive at barrier |
301 |
*/ |
302 |
public void testArrive2() { |
303 |
final Phaser phaser = new Phaser(); |
304 |
assertEquals(0, phaser.register()); |
305 |
List<Thread> threads = new ArrayList<Thread>(); |
306 |
for (int i = 0; i < 10; i++) { |
307 |
assertEquals(0, phaser.register()); |
308 |
threads.add(newStartedThread(new CheckedRunnable() { |
309 |
public void realRun() { |
310 |
assertEquals(0, phaser.arriveAndDeregister()); |
311 |
}})); |
312 |
} |
313 |
|
314 |
for (Thread thread : threads) |
315 |
awaitTermination(thread); |
316 |
assertState(phaser, 0, 1, 1); |
317 |
assertEquals(0, phaser.arrive()); |
318 |
assertState(phaser, 1, 1, 1); |
319 |
} |
320 |
|
321 |
/** |
322 |
* arrive() returns a negative number if the Phaser is terminated |
323 |
*/ |
324 |
public void testArrive3() { |
325 |
Phaser phaser = new Phaser(1); |
326 |
phaser.forceTermination(); |
327 |
assertTerminated(phaser, 0, 1); |
328 |
assertEquals(0, phaser.getPhase() + Integer.MIN_VALUE); |
329 |
assertTrue(phaser.arrive() < 0); |
330 |
assertTrue(phaser.register() < 0); |
331 |
assertTrue(phaser.arriveAndDeregister() < 0); |
332 |
assertTrue(phaser.awaitAdvance(1) < 0); |
333 |
assertTrue(phaser.getPhase() < 0); |
334 |
} |
335 |
|
336 |
/** |
337 |
* arriveAndDeregister() throws IllegalStateException if number of |
338 |
* registered or unarrived parties would become negative |
339 |
*/ |
340 |
public void testArriveAndDeregister1() { |
341 |
try { |
342 |
Phaser phaser = new Phaser(); |
343 |
phaser.arriveAndDeregister(); |
344 |
shouldThrow(); |
345 |
} catch (IllegalStateException success) {} |
346 |
} |
347 |
|
348 |
/** |
349 |
* arriveAndDeregister reduces the number of arrived parties |
350 |
*/ |
351 |
public void testArriveAndDeregister2() { |
352 |
final Phaser phaser = new Phaser(1); |
353 |
assertEquals(0, phaser.register()); |
354 |
assertEquals(0, phaser.arrive()); |
355 |
assertState(phaser, 0, 2, 1); |
356 |
assertEquals(0, phaser.arriveAndDeregister()); |
357 |
assertState(phaser, 1, 1, 1); |
358 |
} |
359 |
|
360 |
/** |
361 |
* arriveAndDeregister arrives at the barrier on a phaser with a parent and |
362 |
* when a deregistration occurs and causes the phaser to have zero parties |
363 |
* its parent will be deregistered as well |
364 |
*/ |
365 |
public void testArriveAndDeregister3() { |
366 |
Phaser parent = new Phaser(); |
367 |
Phaser child = new Phaser(parent); |
368 |
assertState(child, 0, 0, 0); |
369 |
assertState(parent, 0, 0, 0); |
370 |
assertEquals(0, child.register()); |
371 |
assertState(child, 0, 1, 1); |
372 |
assertState(parent, 0, 1, 1); |
373 |
assertEquals(0, child.arriveAndDeregister()); |
374 |
assertTerminated(child, 1); |
375 |
assertTerminated(parent, 1); |
376 |
} |
377 |
|
378 |
/** |
379 |
* arriveAndDeregister deregisters one party from its parent when |
380 |
* the number of parties of child is zero after deregistration |
381 |
*/ |
382 |
public void testArriveAndDeregister4() { |
383 |
Phaser parent = new Phaser(); |
384 |
Phaser child = new Phaser(parent); |
385 |
assertEquals(0, parent.register()); |
386 |
assertEquals(0, child.register()); |
387 |
assertState(child, 0, 1, 1); |
388 |
assertState(parent, 0, 2, 2); |
389 |
assertEquals(0, child.arriveAndDeregister()); |
390 |
assertState(child, 0, 0, 0); |
391 |
assertState(parent, 0, 1, 1); |
392 |
} |
393 |
|
394 |
/** |
395 |
* arriveAndDeregister deregisters one party from its parent when |
396 |
* the number of parties of root is nonzero after deregistration. |
397 |
*/ |
398 |
public void testArriveAndDeregister5() { |
399 |
Phaser root = new Phaser(); |
400 |
Phaser parent = new Phaser(root); |
401 |
Phaser child = new Phaser(parent); |
402 |
assertState(root, 0, 0, 0); |
403 |
assertState(parent, 0, 0, 0); |
404 |
assertState(child, 0, 0, 0); |
405 |
assertEquals(0, child.register()); |
406 |
assertState(root, 0, 1, 1); |
407 |
assertState(parent, 0, 1, 1); |
408 |
assertState(child, 0, 1, 1); |
409 |
assertEquals(0, child.arriveAndDeregister()); |
410 |
assertTerminated(child, 1); |
411 |
assertTerminated(parent, 1); |
412 |
assertTerminated(root, 1); |
413 |
} |
414 |
|
415 |
/** |
416 |
* arriveAndDeregister returns the phase in which it leaves the |
417 |
* phaser in after deregistration |
418 |
*/ |
419 |
public void testArriveAndDeregister6() { |
420 |
final Phaser phaser = new Phaser(2); |
421 |
Thread t = newStartedThread(new CheckedRunnable() { |
422 |
public void realRun() { |
423 |
assertEquals(0, phaser.arrive()); |
424 |
}}); |
425 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
426 |
assertState(phaser, 1, 2, 2); |
427 |
assertEquals(1, phaser.arriveAndDeregister()); |
428 |
assertState(phaser, 1, 1, 1); |
429 |
assertEquals(1, phaser.arriveAndDeregister()); |
430 |
assertTerminated(phaser, 2); |
431 |
awaitTermination(t); |
432 |
} |
433 |
|
434 |
/** |
435 |
* awaitAdvance succeeds upon advance |
436 |
*/ |
437 |
public void testAwaitAdvance1() { |
438 |
final Phaser phaser = new Phaser(1); |
439 |
assertEquals(0, phaser.arrive()); |
440 |
assertEquals(1, phaser.awaitAdvance(0)); |
441 |
} |
442 |
|
443 |
/** |
444 |
* awaitAdvance with a negative parameter will return without affecting the |
445 |
* phaser |
446 |
*/ |
447 |
public void testAwaitAdvance2() { |
448 |
Phaser phaser = new Phaser(); |
449 |
assertTrue(phaser.awaitAdvance(-1) < 0); |
450 |
assertState(phaser, 0, 0, 0); |
451 |
} |
452 |
|
453 |
/** |
454 |
* awaitAdvanceInterruptibly blocks interruptibly |
455 |
*/ |
456 |
public void testAwaitAdvanceInterruptibly_interruptible() throws InterruptedException { |
457 |
final Phaser phaser = new Phaser(1); |
458 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
459 |
|
460 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
461 |
public void realRun() { |
462 |
Thread.currentThread().interrupt(); |
463 |
try { |
464 |
phaser.awaitAdvanceInterruptibly(0); |
465 |
shouldThrow(); |
466 |
} catch (InterruptedException success) {} |
467 |
assertFalse(Thread.interrupted()); |
468 |
|
469 |
pleaseInterrupt.countDown(); |
470 |
try { |
471 |
phaser.awaitAdvanceInterruptibly(0); |
472 |
shouldThrow(); |
473 |
} catch (InterruptedException success) {} |
474 |
assertFalse(Thread.interrupted()); |
475 |
}}); |
476 |
|
477 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
478 |
public void realRun() throws TimeoutException { |
479 |
Thread.currentThread().interrupt(); |
480 |
try { |
481 |
phaser.awaitAdvanceInterruptibly(0, 2*LONG_DELAY_MS, MILLISECONDS); |
482 |
shouldThrow(); |
483 |
} catch (InterruptedException success) {} |
484 |
assertFalse(Thread.interrupted()); |
485 |
|
486 |
pleaseInterrupt.countDown(); |
487 |
try { |
488 |
phaser.awaitAdvanceInterruptibly(0, 2*LONG_DELAY_MS, MILLISECONDS); |
489 |
shouldThrow(); |
490 |
} catch (InterruptedException success) {} |
491 |
assertFalse(Thread.interrupted()); |
492 |
}}); |
493 |
|
494 |
await(pleaseInterrupt); |
495 |
assertState(phaser, 0, 1, 1); |
496 |
assertThreadsStayAlive(t1, t2); |
497 |
t1.interrupt(); |
498 |
t2.interrupt(); |
499 |
awaitTermination(t1); |
500 |
awaitTermination(t2); |
501 |
assertState(phaser, 0, 1, 1); |
502 |
assertEquals(0, phaser.arrive()); |
503 |
assertState(phaser, 1, 1, 1); |
504 |
} |
505 |
|
506 |
/** |
507 |
* awaitAdvance continues waiting if interrupted before waiting |
508 |
*/ |
509 |
public void testAwaitAdvanceAfterInterrupt() { |
510 |
final Phaser phaser = new Phaser(); |
511 |
assertEquals(0, phaser.register()); |
512 |
final CountDownLatch pleaseArrive = new CountDownLatch(1); |
513 |
|
514 |
Thread t = newStartedThread(new CheckedRunnable() { |
515 |
public void realRun() { |
516 |
Thread.currentThread().interrupt(); |
517 |
assertEquals(0, phaser.register()); |
518 |
assertEquals(0, phaser.arrive()); |
519 |
pleaseArrive.countDown(); |
520 |
assertTrue(Thread.currentThread().isInterrupted()); |
521 |
assertEquals(1, phaser.awaitAdvance(0)); |
522 |
assertTrue(Thread.interrupted()); |
523 |
}}); |
524 |
|
525 |
await(pleaseArrive); |
526 |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
527 |
assertEquals(0, phaser.arrive()); |
528 |
awaitTermination(t); |
529 |
|
530 |
Thread.currentThread().interrupt(); |
531 |
assertEquals(1, phaser.awaitAdvance(0)); |
532 |
assertTrue(Thread.interrupted()); |
533 |
} |
534 |
|
535 |
/** |
536 |
* awaitAdvance continues waiting if interrupted while waiting |
537 |
*/ |
538 |
public void testAwaitAdvanceBeforeInterrupt() { |
539 |
final Phaser phaser = new Phaser(); |
540 |
assertEquals(0, phaser.register()); |
541 |
final CountDownLatch pleaseArrive = new CountDownLatch(1); |
542 |
|
543 |
Thread t = newStartedThread(new CheckedRunnable() { |
544 |
public void realRun() { |
545 |
assertEquals(0, phaser.register()); |
546 |
assertEquals(0, phaser.arrive()); |
547 |
assertFalse(Thread.currentThread().isInterrupted()); |
548 |
pleaseArrive.countDown(); |
549 |
assertEquals(1, phaser.awaitAdvance(0)); |
550 |
assertTrue(Thread.interrupted()); |
551 |
}}); |
552 |
|
553 |
await(pleaseArrive); |
554 |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
555 |
t.interrupt(); |
556 |
assertEquals(0, phaser.arrive()); |
557 |
awaitTermination(t); |
558 |
|
559 |
Thread.currentThread().interrupt(); |
560 |
assertEquals(1, phaser.awaitAdvance(0)); |
561 |
assertTrue(Thread.interrupted()); |
562 |
} |
563 |
|
564 |
/** |
565 |
* arriveAndAwaitAdvance continues waiting if interrupted before waiting |
566 |
*/ |
567 |
public void testArriveAndAwaitAdvanceAfterInterrupt() { |
568 |
final Phaser phaser = new Phaser(); |
569 |
assertEquals(0, phaser.register()); |
570 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
571 |
|
572 |
Thread t = newStartedThread(new CheckedRunnable() { |
573 |
public void realRun() { |
574 |
Thread.currentThread().interrupt(); |
575 |
assertEquals(0, phaser.register()); |
576 |
pleaseInterrupt.countDown(); |
577 |
assertTrue(Thread.currentThread().isInterrupted()); |
578 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
579 |
assertTrue(Thread.currentThread().isInterrupted()); |
580 |
}}); |
581 |
|
582 |
await(pleaseInterrupt); |
583 |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
584 |
Thread.currentThread().interrupt(); |
585 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
586 |
assertTrue(Thread.interrupted()); |
587 |
awaitTermination(t); |
588 |
} |
589 |
|
590 |
/** |
591 |
* arriveAndAwaitAdvance continues waiting if interrupted while waiting |
592 |
*/ |
593 |
public void testArriveAndAwaitAdvanceBeforeInterrupt() { |
594 |
final Phaser phaser = new Phaser(); |
595 |
assertEquals(0, phaser.register()); |
596 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
597 |
|
598 |
Thread t = newStartedThread(new CheckedRunnable() { |
599 |
public void realRun() { |
600 |
assertEquals(0, phaser.register()); |
601 |
assertFalse(Thread.currentThread().isInterrupted()); |
602 |
pleaseInterrupt.countDown(); |
603 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
604 |
assertTrue(Thread.currentThread().isInterrupted()); |
605 |
}}); |
606 |
|
607 |
await(pleaseInterrupt); |
608 |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
609 |
t.interrupt(); |
610 |
Thread.currentThread().interrupt(); |
611 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
612 |
assertTrue(Thread.interrupted()); |
613 |
awaitTermination(t); |
614 |
} |
615 |
|
616 |
/** |
617 |
* awaitAdvance atomically waits for all parties within the same phase to |
618 |
* complete before continuing |
619 |
*/ |
620 |
public void testAwaitAdvance4() { |
621 |
final Phaser phaser = new Phaser(4); |
622 |
final AtomicInteger count = new AtomicInteger(0); |
623 |
List<Thread> threads = new ArrayList<Thread>(); |
624 |
for (int i = 0; i < 4; i++) |
625 |
threads.add(newStartedThread(new CheckedRunnable() { |
626 |
public void realRun() { |
627 |
for (int k = 0; k < 3; k++) { |
628 |
assertEquals(2*k+1, phaser.arriveAndAwaitAdvance()); |
629 |
count.incrementAndGet(); |
630 |
assertEquals(2*k+1, phaser.arrive()); |
631 |
assertEquals(2*k+2, phaser.awaitAdvance(2*k+1)); |
632 |
assertEquals(4*(k+1), count.get()); |
633 |
}}})); |
634 |
|
635 |
for (Thread thread : threads) |
636 |
awaitTermination(thread); |
637 |
} |
638 |
|
639 |
/** |
640 |
* awaitAdvance returns the current phase |
641 |
*/ |
642 |
public void testAwaitAdvance5() { |
643 |
final Phaser phaser = new Phaser(1); |
644 |
assertEquals(1, phaser.awaitAdvance(phaser.arrive())); |
645 |
assertEquals(1, phaser.getPhase()); |
646 |
assertEquals(1, phaser.register()); |
647 |
List<Thread> threads = new ArrayList<Thread>(); |
648 |
for (int i = 0; i < 8; i++) { |
649 |
final CountDownLatch latch = new CountDownLatch(1); |
650 |
final boolean goesFirst = ((i & 1) == 0); |
651 |
threads.add(newStartedThread(new CheckedRunnable() { |
652 |
public void realRun() { |
653 |
if (goesFirst) |
654 |
latch.countDown(); |
655 |
else |
656 |
await(latch); |
657 |
phaser.arrive(); |
658 |
}})); |
659 |
if (goesFirst) |
660 |
await(latch); |
661 |
else |
662 |
latch.countDown(); |
663 |
assertEquals(i + 2, phaser.awaitAdvance(phaser.arrive())); |
664 |
assertEquals(i + 2, phaser.getPhase()); |
665 |
} |
666 |
for (Thread thread : threads) |
667 |
awaitTermination(thread); |
668 |
} |
669 |
|
670 |
/** |
671 |
* awaitAdvance returns the current phase in child phasers |
672 |
*/ |
673 |
public void testAwaitAdvanceTieredPhaser() throws Exception { |
674 |
final Phaser parent = new Phaser(); |
675 |
final List<Phaser> zeroPartyChildren = new ArrayList<Phaser>(3); |
676 |
final List<Phaser> onePartyChildren = new ArrayList<Phaser>(3); |
677 |
for (int i = 0; i < 3; i++) { |
678 |
zeroPartyChildren.add(new Phaser(parent, 0)); |
679 |
onePartyChildren.add(new Phaser(parent, 1)); |
680 |
} |
681 |
final List<Phaser> phasers = new ArrayList<Phaser>(); |
682 |
phasers.addAll(zeroPartyChildren); |
683 |
phasers.addAll(onePartyChildren); |
684 |
phasers.add(parent); |
685 |
for (Phaser phaser : phasers) { |
686 |
assertEquals(-42, phaser.awaitAdvance(-42)); |
687 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42)); |
688 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42, SMALL_DELAY_MS, MILLISECONDS)); |
689 |
} |
690 |
|
691 |
for (Phaser child : onePartyChildren) |
692 |
assertEquals(0, child.arrive()); |
693 |
for (Phaser phaser : phasers) { |
694 |
assertEquals(-42, phaser.awaitAdvance(-42)); |
695 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42)); |
696 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42, SMALL_DELAY_MS, MILLISECONDS)); |
697 |
assertEquals(1, phaser.awaitAdvance(0)); |
698 |
assertEquals(1, phaser.awaitAdvanceInterruptibly(0)); |
699 |
assertEquals(1, phaser.awaitAdvanceInterruptibly(0, SMALL_DELAY_MS, MILLISECONDS)); |
700 |
} |
701 |
|
702 |
for (Phaser child : onePartyChildren) |
703 |
assertEquals(1, child.arrive()); |
704 |
for (Phaser phaser : phasers) { |
705 |
assertEquals(-42, phaser.awaitAdvance(-42)); |
706 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42)); |
707 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42, SMALL_DELAY_MS, MILLISECONDS)); |
708 |
assertEquals(2, phaser.awaitAdvance(0)); |
709 |
assertEquals(2, phaser.awaitAdvanceInterruptibly(0)); |
710 |
assertEquals(2, phaser.awaitAdvanceInterruptibly(0, SMALL_DELAY_MS, MILLISECONDS)); |
711 |
assertEquals(2, phaser.awaitAdvance(1)); |
712 |
assertEquals(2, phaser.awaitAdvanceInterruptibly(1)); |
713 |
assertEquals(2, phaser.awaitAdvanceInterruptibly(1, SMALL_DELAY_MS, MILLISECONDS)); |
714 |
} |
715 |
} |
716 |
|
717 |
/** |
718 |
* awaitAdvance returns when the phaser is externally terminated |
719 |
*/ |
720 |
public void testAwaitAdvance6() { |
721 |
final Phaser phaser = new Phaser(3); |
722 |
final CountDownLatch pleaseForceTermination = new CountDownLatch(2); |
723 |
final List<Thread> threads = new ArrayList<Thread>(); |
724 |
for (int i = 0; i < 2; i++) { |
725 |
Runnable r = new CheckedRunnable() { |
726 |
public void realRun() { |
727 |
assertEquals(0, phaser.arrive()); |
728 |
pleaseForceTermination.countDown(); |
729 |
assertTrue(phaser.awaitAdvance(0) < 0); |
730 |
assertTrue(phaser.isTerminated()); |
731 |
assertTrue(phaser.getPhase() < 0); |
732 |
assertEquals(0, phaser.getPhase() + Integer.MIN_VALUE); |
733 |
assertEquals(3, phaser.getRegisteredParties()); |
734 |
}}; |
735 |
threads.add(newStartedThread(r)); |
736 |
} |
737 |
await(pleaseForceTermination); |
738 |
phaser.forceTermination(); |
739 |
assertTrue(phaser.isTerminated()); |
740 |
assertEquals(0, phaser.getPhase() + Integer.MIN_VALUE); |
741 |
for (Thread thread : threads) |
742 |
awaitTermination(thread); |
743 |
assertEquals(3, phaser.getRegisteredParties()); |
744 |
} |
745 |
|
746 |
/** |
747 |
* arriveAndAwaitAdvance throws IllegalStateException with no |
748 |
* unarrived parties |
749 |
*/ |
750 |
public void testArriveAndAwaitAdvance1() { |
751 |
try { |
752 |
Phaser phaser = new Phaser(); |
753 |
phaser.arriveAndAwaitAdvance(); |
754 |
shouldThrow(); |
755 |
} catch (IllegalStateException success) {} |
756 |
} |
757 |
|
758 |
/** |
759 |
* arriveAndAwaitAdvance waits for all threads to arrive, the |
760 |
* number of arrived parties is the same number that is accounted |
761 |
* for when the main thread awaitsAdvance |
762 |
*/ |
763 |
public void testArriveAndAwaitAdvance3() { |
764 |
final Phaser phaser = new Phaser(1); |
765 |
final int THREADS = 3; |
766 |
final CountDownLatch pleaseArrive = new CountDownLatch(THREADS); |
767 |
final List<Thread> threads = new ArrayList<Thread>(); |
768 |
for (int i = 0; i < THREADS; i++) |
769 |
threads.add(newStartedThread(new CheckedRunnable() { |
770 |
public void realRun() { |
771 |
assertEquals(0, phaser.register()); |
772 |
pleaseArrive.countDown(); |
773 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
774 |
}})); |
775 |
|
776 |
await(pleaseArrive); |
777 |
long startTime = System.nanoTime(); |
778 |
while (phaser.getArrivedParties() < THREADS) |
779 |
Thread.yield(); |
780 |
assertEquals(THREADS, phaser.getArrivedParties()); |
781 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
782 |
for (Thread thread : threads) |
783 |
waitForThreadToEnterWaitState(thread, SHORT_DELAY_MS); |
784 |
for (Thread thread : threads) |
785 |
assertTrue(thread.isAlive()); |
786 |
assertState(phaser, 0, THREADS + 1, 1); |
787 |
phaser.arriveAndAwaitAdvance(); |
788 |
for (Thread thread : threads) |
789 |
awaitTermination(thread); |
790 |
assertState(phaser, 1, THREADS + 1, THREADS + 1); |
791 |
} |
792 |
|
793 |
} |