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 junit.framework.*; |
9 |
import java.util.ArrayList; |
10 |
import java.util.List; |
11 |
import java.util.concurrent.Phaser; |
12 |
import java.util.concurrent.CountDownLatch; |
13 |
import java.util.concurrent.TimeoutException; |
14 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
15 |
import java.util.concurrent.atomic.AtomicInteger; |
16 |
|
17 |
public class PhaserTest extends JSR166TestCase { |
18 |
|
19 |
public static void main(String[] args) { |
20 |
junit.textui.TestRunner.run(suite()); |
21 |
} |
22 |
|
23 |
public static Test suite() { |
24 |
return new TestSuite(PhaserTest.class); |
25 |
} |
26 |
|
27 |
private static final int maxParties = 65535; |
28 |
|
29 |
/** Checks state of unterminated phaser. */ |
30 |
protected void assertState(Phaser phaser, |
31 |
int phase, int parties, int unarrived) { |
32 |
assertEquals(phase, phaser.getPhase()); |
33 |
assertEquals(parties, phaser.getRegisteredParties()); |
34 |
assertEquals(unarrived, phaser.getUnarrivedParties()); |
35 |
assertEquals(parties - unarrived, phaser.getArrivedParties()); |
36 |
assertFalse(phaser.isTerminated()); |
37 |
} |
38 |
|
39 |
/** Checks state of terminated phaser. */ |
40 |
protected void assertTerminated(Phaser phaser, int maxPhase, int parties) { |
41 |
assertTrue(phaser.isTerminated()); |
42 |
int expectedPhase = maxPhase + Integer.MIN_VALUE; |
43 |
assertEquals(expectedPhase, phaser.getPhase()); |
44 |
assertEquals(parties, phaser.getRegisteredParties()); |
45 |
assertEquals(expectedPhase, phaser.register()); |
46 |
assertEquals(expectedPhase, phaser.arrive()); |
47 |
assertEquals(expectedPhase, phaser.arriveAndDeregister()); |
48 |
} |
49 |
|
50 |
protected void assertTerminated(Phaser phaser, int maxPhase) { |
51 |
assertTerminated(phaser, maxPhase, 0); |
52 |
} |
53 |
|
54 |
/** |
55 |
* Empty constructor builds a new Phaser with no parent, no registered |
56 |
* parties and initial phase number of 0 |
57 |
*/ |
58 |
public void testConstructorDefaultValues() { |
59 |
Phaser phaser = new Phaser(); |
60 |
assertNull(phaser.getParent()); |
61 |
assertEquals(0, phaser.getRegisteredParties()); |
62 |
assertEquals(0, phaser.getArrivedParties()); |
63 |
assertEquals(0, phaser.getUnarrivedParties()); |
64 |
assertEquals(0, phaser.getPhase()); |
65 |
} |
66 |
|
67 |
/** |
68 |
* Constructing with a negative number of parties throws |
69 |
* IllegalArgumentException |
70 |
*/ |
71 |
public void testConstructorNegativeParties() { |
72 |
try { |
73 |
new Phaser(-1); |
74 |
shouldThrow(); |
75 |
} catch (IllegalArgumentException success) {} |
76 |
} |
77 |
|
78 |
/** |
79 |
* Constructing with a negative number of parties throws |
80 |
* IllegalArgumentException |
81 |
*/ |
82 |
public void testConstructorNegativeParties2() { |
83 |
try { |
84 |
new Phaser(new Phaser(), -1); |
85 |
shouldThrow(); |
86 |
} catch (IllegalArgumentException success) {} |
87 |
} |
88 |
|
89 |
/** |
90 |
* Constructing with a number of parties > 65535 throws |
91 |
* IllegalArgumentException |
92 |
*/ |
93 |
public void testConstructorPartiesExceedsLimit() { |
94 |
new Phaser(maxParties); |
95 |
try { |
96 |
new Phaser(maxParties + 1); |
97 |
shouldThrow(); |
98 |
} catch (IllegalArgumentException success) {} |
99 |
|
100 |
new Phaser(new Phaser(), maxParties); |
101 |
try { |
102 |
new Phaser(new Phaser(), maxParties + 1); |
103 |
shouldThrow(); |
104 |
} catch (IllegalArgumentException success) {} |
105 |
} |
106 |
|
107 |
/** |
108 |
* The parent provided to the constructor should be returned from |
109 |
* a later call to getParent |
110 |
*/ |
111 |
public void testConstructor3() { |
112 |
Phaser parent = new Phaser(); |
113 |
assertSame(parent, new Phaser(parent).getParent()); |
114 |
assertNull(new Phaser(null).getParent()); |
115 |
} |
116 |
|
117 |
/** |
118 |
* The parent being input into the parameter should equal the original |
119 |
* parent when being returned |
120 |
*/ |
121 |
public void testConstructor5() { |
122 |
Phaser parent = new Phaser(); |
123 |
assertSame(parent, new Phaser(parent, 0).getParent()); |
124 |
assertNull(new Phaser(null, 0).getParent()); |
125 |
} |
126 |
|
127 |
/** |
128 |
* register() will increment the number of unarrived parties by |
129 |
* one and not affect its arrived parties |
130 |
*/ |
131 |
public void testRegister1() { |
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Phaser phaser = new Phaser(); |
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assertState(phaser, 0, 0, 0); |
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assertEquals(0, phaser.register()); |
135 |
assertState(phaser, 0, 1, 1); |
136 |
} |
137 |
|
138 |
/** |
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* Registering more than 65536 parties causes IllegalStateException |
140 |
*/ |
141 |
public void testRegister2() { |
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Phaser phaser = new Phaser(0); |
143 |
assertState(phaser, 0, 0, 0); |
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assertEquals(0, phaser.bulkRegister(maxParties - 10)); |
145 |
assertState(phaser, 0, maxParties - 10, maxParties - 10); |
146 |
for (int i = 0; i < 10; i++) { |
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assertState(phaser, 0, maxParties - 10 + i, maxParties - 10 + i); |
148 |
assertEquals(0, phaser.register()); |
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} |
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assertState(phaser, 0, maxParties, maxParties); |
151 |
try { |
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phaser.register(); |
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shouldThrow(); |
154 |
} catch (IllegalStateException success) {} |
155 |
|
156 |
try { |
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phaser.bulkRegister(Integer.MAX_VALUE); |
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shouldThrow(); |
159 |
} catch (IllegalStateException success) {} |
160 |
|
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assertEquals(0, phaser.bulkRegister(0)); |
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assertState(phaser, 0, maxParties, maxParties); |
163 |
} |
164 |
|
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/** |
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* register() correctly returns the current barrier phase number |
167 |
* when invoked |
168 |
*/ |
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public void testRegister3() { |
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Phaser phaser = new Phaser(); |
171 |
assertEquals(0, phaser.register()); |
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assertEquals(0, phaser.arrive()); |
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assertEquals(1, phaser.register()); |
174 |
assertState(phaser, 1, 2, 2); |
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} |
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|
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/** |
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* register causes the next arrive to not increment the phase |
179 |
* rather retain the phase number |
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*/ |
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public void testRegister4() { |
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Phaser phaser = new Phaser(1); |
183 |
assertEquals(0, phaser.arrive()); |
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assertEquals(1, phaser.register()); |
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assertEquals(1, phaser.arrive()); |
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assertState(phaser, 1, 2, 1); |
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} |
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|
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/** |
190 |
* register on a subphaser that is currently empty succeeds, even |
191 |
* in the presence of another non-empty subphaser |
192 |
*/ |
193 |
public void testRegisterEmptySubPhaser() { |
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Phaser root = new Phaser(); |
195 |
Phaser child1 = new Phaser(root, 1); |
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Phaser child2 = new Phaser(root, 0); |
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assertEquals(0, child2.register()); |
198 |
assertState(root, 0, 2, 2); |
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assertState(child1, 0, 1, 1); |
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assertState(child2, 0, 1, 1); |
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assertEquals(0, child2.arriveAndDeregister()); |
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assertState(root, 0, 1, 1); |
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assertState(child1, 0, 1, 1); |
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assertState(child2, 0, 0, 0); |
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assertEquals(0, child2.register()); |
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assertEquals(0, child2.arriveAndDeregister()); |
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assertState(root, 0, 1, 1); |
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assertState(child1, 0, 1, 1); |
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assertState(child2, 0, 0, 0); |
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assertEquals(0, child1.arriveAndDeregister()); |
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assertTerminated(root, 1); |
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assertTerminated(child1, 1); |
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assertTerminated(child2, 1); |
214 |
} |
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|
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/** |
217 |
* Invoking bulkRegister with a negative parameter throws an |
218 |
* IllegalArgumentException |
219 |
*/ |
220 |
public void testBulkRegister1() { |
221 |
try { |
222 |
new Phaser().bulkRegister(-1); |
223 |
shouldThrow(); |
224 |
} catch (IllegalArgumentException success) {} |
225 |
} |
226 |
|
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/** |
228 |
* bulkRegister should correctly record the number of unarrived |
229 |
* parties with the number of parties being registered |
230 |
*/ |
231 |
public void testBulkRegister2() { |
232 |
Phaser phaser = new Phaser(); |
233 |
assertEquals(0, phaser.bulkRegister(0)); |
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assertState(phaser, 0, 0, 0); |
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assertEquals(0, phaser.bulkRegister(20)); |
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assertState(phaser, 0, 20, 20); |
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} |
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|
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/** |
240 |
* Registering with a number of parties greater than or equal to 1<<16 |
241 |
* throws IllegalStateException. |
242 |
*/ |
243 |
public void testBulkRegister3() { |
244 |
assertEquals(0, new Phaser().bulkRegister((1 << 16) - 1)); |
245 |
|
246 |
try { |
247 |
new Phaser().bulkRegister(1 << 16); |
248 |
shouldThrow(); |
249 |
} catch (IllegalStateException success) {} |
250 |
|
251 |
try { |
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new Phaser(2).bulkRegister((1 << 16) - 2); |
253 |
shouldThrow(); |
254 |
} catch (IllegalStateException success) {} |
255 |
} |
256 |
|
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/** |
258 |
* the phase number increments correctly when tripping the barrier |
259 |
*/ |
260 |
public void testPhaseIncrement1() { |
261 |
for (int size = 1; size < nine; size++) { |
262 |
final Phaser phaser = new Phaser(size); |
263 |
for (int index = 0; index <= (1 << size); index++) { |
264 |
int phase = phaser.arrive(); |
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assertTrue(index % size == 0 ? (index / size) == phase : index - (phase * size) > 0); |
266 |
} |
267 |
} |
268 |
} |
269 |
|
270 |
/** |
271 |
* arrive() on a registered phaser increments phase. |
272 |
*/ |
273 |
public void testArrive1() { |
274 |
Phaser phaser = new Phaser(1); |
275 |
assertState(phaser, 0, 1, 1); |
276 |
assertEquals(0, phaser.arrive()); |
277 |
assertState(phaser, 1, 1, 1); |
278 |
} |
279 |
|
280 |
/** |
281 |
* arriveAndDeregister does not wait for others to arrive at barrier |
282 |
*/ |
283 |
public void testArriveAndDeregister() { |
284 |
final Phaser phaser = new Phaser(1); |
285 |
for (int i = 0; i < 10; i++) { |
286 |
assertState(phaser, 0, 1, 1); |
287 |
assertEquals(0, phaser.register()); |
288 |
assertState(phaser, 0, 2, 2); |
289 |
assertEquals(0, phaser.arriveAndDeregister()); |
290 |
assertState(phaser, 0, 1, 1); |
291 |
} |
292 |
assertEquals(0, phaser.arriveAndDeregister()); |
293 |
assertTerminated(phaser, 1); |
294 |
} |
295 |
|
296 |
/** |
297 |
* arriveAndDeregister does not wait for others to arrive at barrier |
298 |
*/ |
299 |
public void testArrive2() { |
300 |
final Phaser phaser = new Phaser(); |
301 |
assertEquals(0, phaser.register()); |
302 |
List<Thread> threads = new ArrayList<Thread>(); |
303 |
for (int i = 0; i < 10; i++) { |
304 |
assertEquals(0, phaser.register()); |
305 |
threads.add(newStartedThread(new CheckedRunnable() { |
306 |
public void realRun() { |
307 |
assertEquals(0, phaser.arriveAndDeregister()); |
308 |
}})); |
309 |
} |
310 |
|
311 |
for (Thread thread : threads) |
312 |
awaitTermination(thread); |
313 |
assertState(phaser, 0, 1, 1); |
314 |
assertEquals(0, phaser.arrive()); |
315 |
assertState(phaser, 1, 1, 1); |
316 |
} |
317 |
|
318 |
/** |
319 |
* arrive() returns a negative number if the Phaser is terminated |
320 |
*/ |
321 |
public void testArrive3() { |
322 |
Phaser phaser = new Phaser(1); |
323 |
phaser.forceTermination(); |
324 |
assertTerminated(phaser, 0, 1); |
325 |
assertEquals(0, phaser.getPhase() + Integer.MIN_VALUE); |
326 |
assertTrue(phaser.arrive() < 0); |
327 |
assertTrue(phaser.register() < 0); |
328 |
assertTrue(phaser.arriveAndDeregister() < 0); |
329 |
assertTrue(phaser.awaitAdvance(1) < 0); |
330 |
assertTrue(phaser.getPhase() < 0); |
331 |
} |
332 |
|
333 |
/** |
334 |
* arriveAndDeregister() throws IllegalStateException if number of |
335 |
* registered or unarrived parties would become negative |
336 |
*/ |
337 |
public void testArriveAndDeregister1() { |
338 |
try { |
339 |
Phaser phaser = new Phaser(); |
340 |
phaser.arriveAndDeregister(); |
341 |
shouldThrow(); |
342 |
} catch (IllegalStateException success) {} |
343 |
} |
344 |
|
345 |
/** |
346 |
* arriveAndDeregister reduces the number of arrived parties |
347 |
*/ |
348 |
public void testArriveAndDeregister2() { |
349 |
final Phaser phaser = new Phaser(1); |
350 |
assertEquals(0, phaser.register()); |
351 |
assertEquals(0, phaser.arrive()); |
352 |
assertState(phaser, 0, 2, 1); |
353 |
assertEquals(0, phaser.arriveAndDeregister()); |
354 |
assertState(phaser, 1, 1, 1); |
355 |
} |
356 |
|
357 |
/** |
358 |
* arriveAndDeregister arrives at the barrier on a phaser with a parent and |
359 |
* when a deregistration occurs and causes the phaser to have zero parties |
360 |
* its parent will be deregistered as well |
361 |
*/ |
362 |
public void testArriveAndDeregister3() { |
363 |
Phaser parent = new Phaser(); |
364 |
Phaser child = new Phaser(parent); |
365 |
assertState(child, 0, 0, 0); |
366 |
assertState(parent, 0, 0, 0); |
367 |
assertEquals(0, child.register()); |
368 |
assertState(child, 0, 1, 1); |
369 |
assertState(parent, 0, 1, 1); |
370 |
assertEquals(0, child.arriveAndDeregister()); |
371 |
assertTerminated(child, 1); |
372 |
assertTerminated(parent, 1); |
373 |
} |
374 |
|
375 |
/** |
376 |
* arriveAndDeregister deregisters one party from its parent when |
377 |
* the number of parties of child is zero after deregistration |
378 |
*/ |
379 |
public void testArriveAndDeregister4() { |
380 |
Phaser parent = new Phaser(); |
381 |
Phaser child = new Phaser(parent); |
382 |
assertEquals(0, parent.register()); |
383 |
assertEquals(0, child.register()); |
384 |
assertState(child, 0, 1, 1); |
385 |
assertState(parent, 0, 2, 2); |
386 |
assertEquals(0, child.arriveAndDeregister()); |
387 |
assertState(child, 0, 0, 0); |
388 |
assertState(parent, 0, 1, 1); |
389 |
} |
390 |
|
391 |
/** |
392 |
* arriveAndDeregister deregisters one party from its parent when |
393 |
* the number of parties of root is nonzero after deregistration. |
394 |
*/ |
395 |
public void testArriveAndDeregister5() { |
396 |
Phaser root = new Phaser(); |
397 |
Phaser parent = new Phaser(root); |
398 |
Phaser child = new Phaser(parent); |
399 |
assertState(root, 0, 0, 0); |
400 |
assertState(parent, 0, 0, 0); |
401 |
assertState(child, 0, 0, 0); |
402 |
assertEquals(0, child.register()); |
403 |
assertState(root, 0, 1, 1); |
404 |
assertState(parent, 0, 1, 1); |
405 |
assertState(child, 0, 1, 1); |
406 |
assertEquals(0, child.arriveAndDeregister()); |
407 |
assertTerminated(child, 1); |
408 |
assertTerminated(parent, 1); |
409 |
assertTerminated(root, 1); |
410 |
} |
411 |
|
412 |
/** |
413 |
* arriveAndDeregister returns the phase in which it leaves the |
414 |
* phaser in after deregistration |
415 |
*/ |
416 |
public void testArriveAndDeregister6() { |
417 |
final Phaser phaser = new Phaser(2); |
418 |
Thread t = newStartedThread(new CheckedRunnable() { |
419 |
public void realRun() { |
420 |
assertEquals(0, phaser.arrive()); |
421 |
}}); |
422 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
423 |
assertState(phaser, 1, 2, 2); |
424 |
assertEquals(1, phaser.arriveAndDeregister()); |
425 |
assertState(phaser, 1, 1, 1); |
426 |
assertEquals(1, phaser.arriveAndDeregister()); |
427 |
assertTerminated(phaser, 2); |
428 |
awaitTermination(t); |
429 |
} |
430 |
|
431 |
/** |
432 |
* awaitAdvance succeeds upon advance |
433 |
*/ |
434 |
public void testAwaitAdvance1() { |
435 |
final Phaser phaser = new Phaser(1); |
436 |
assertEquals(0, phaser.arrive()); |
437 |
assertEquals(1, phaser.awaitAdvance(0)); |
438 |
} |
439 |
|
440 |
/** |
441 |
* awaitAdvance with a negative parameter will return without affecting the |
442 |
* phaser |
443 |
*/ |
444 |
public void testAwaitAdvance2() { |
445 |
Phaser phaser = new Phaser(); |
446 |
assertTrue(phaser.awaitAdvance(-1) < 0); |
447 |
assertState(phaser, 0, 0, 0); |
448 |
} |
449 |
|
450 |
/** |
451 |
* awaitAdvanceInterruptibly blocks interruptibly |
452 |
*/ |
453 |
public void testAwaitAdvanceInterruptibly_interruptible() throws InterruptedException { |
454 |
final Phaser phaser = new Phaser(1); |
455 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
456 |
|
457 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
458 |
public void realRun() { |
459 |
Thread.currentThread().interrupt(); |
460 |
try { |
461 |
phaser.awaitAdvanceInterruptibly(0); |
462 |
shouldThrow(); |
463 |
} catch (InterruptedException success) {} |
464 |
assertFalse(Thread.interrupted()); |
465 |
|
466 |
pleaseInterrupt.countDown(); |
467 |
try { |
468 |
phaser.awaitAdvanceInterruptibly(0); |
469 |
shouldThrow(); |
470 |
} catch (InterruptedException success) {} |
471 |
assertFalse(Thread.interrupted()); |
472 |
}}); |
473 |
|
474 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
475 |
public void realRun() throws TimeoutException { |
476 |
Thread.currentThread().interrupt(); |
477 |
try { |
478 |
phaser.awaitAdvanceInterruptibly(0, 2*LONG_DELAY_MS, MILLISECONDS); |
479 |
shouldThrow(); |
480 |
} catch (InterruptedException success) {} |
481 |
assertFalse(Thread.interrupted()); |
482 |
|
483 |
pleaseInterrupt.countDown(); |
484 |
try { |
485 |
phaser.awaitAdvanceInterruptibly(0, 2*LONG_DELAY_MS, MILLISECONDS); |
486 |
shouldThrow(); |
487 |
} catch (InterruptedException success) {} |
488 |
assertFalse(Thread.interrupted()); |
489 |
}}); |
490 |
|
491 |
await(pleaseInterrupt); |
492 |
assertState(phaser, 0, 1, 1); |
493 |
assertThreadsStayAlive(t1, t2); |
494 |
t1.interrupt(); |
495 |
t2.interrupt(); |
496 |
awaitTermination(t1); |
497 |
awaitTermination(t2); |
498 |
assertState(phaser, 0, 1, 1); |
499 |
assertEquals(0, phaser.arrive()); |
500 |
assertState(phaser, 1, 1, 1); |
501 |
} |
502 |
|
503 |
/** |
504 |
* awaitAdvance continues waiting if interrupted before waiting |
505 |
*/ |
506 |
public void testAwaitAdvanceAfterInterrupt() { |
507 |
final Phaser phaser = new Phaser(); |
508 |
assertEquals(0, phaser.register()); |
509 |
final CountDownLatch pleaseArrive = new CountDownLatch(1); |
510 |
|
511 |
Thread t = newStartedThread(new CheckedRunnable() { |
512 |
public void realRun() { |
513 |
Thread.currentThread().interrupt(); |
514 |
assertEquals(0, phaser.register()); |
515 |
assertEquals(0, phaser.arrive()); |
516 |
pleaseArrive.countDown(); |
517 |
assertTrue(Thread.currentThread().isInterrupted()); |
518 |
assertEquals(1, phaser.awaitAdvance(0)); |
519 |
assertTrue(Thread.interrupted()); |
520 |
}}); |
521 |
|
522 |
await(pleaseArrive); |
523 |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
524 |
assertEquals(0, phaser.arrive()); |
525 |
awaitTermination(t); |
526 |
|
527 |
Thread.currentThread().interrupt(); |
528 |
assertEquals(1, phaser.awaitAdvance(0)); |
529 |
assertTrue(Thread.interrupted()); |
530 |
} |
531 |
|
532 |
/** |
533 |
* awaitAdvance continues waiting if interrupted while waiting |
534 |
*/ |
535 |
public void testAwaitAdvanceBeforeInterrupt() { |
536 |
final Phaser phaser = new Phaser(); |
537 |
assertEquals(0, phaser.register()); |
538 |
final CountDownLatch pleaseArrive = new CountDownLatch(1); |
539 |
|
540 |
Thread t = newStartedThread(new CheckedRunnable() { |
541 |
public void realRun() { |
542 |
assertEquals(0, phaser.register()); |
543 |
assertEquals(0, phaser.arrive()); |
544 |
assertFalse(Thread.currentThread().isInterrupted()); |
545 |
pleaseArrive.countDown(); |
546 |
assertEquals(1, phaser.awaitAdvance(0)); |
547 |
assertTrue(Thread.interrupted()); |
548 |
}}); |
549 |
|
550 |
await(pleaseArrive); |
551 |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
552 |
t.interrupt(); |
553 |
assertEquals(0, phaser.arrive()); |
554 |
awaitTermination(t); |
555 |
|
556 |
Thread.currentThread().interrupt(); |
557 |
assertEquals(1, phaser.awaitAdvance(0)); |
558 |
assertTrue(Thread.interrupted()); |
559 |
} |
560 |
|
561 |
/** |
562 |
* arriveAndAwaitAdvance continues waiting if interrupted before waiting |
563 |
*/ |
564 |
public void testArriveAndAwaitAdvanceAfterInterrupt() { |
565 |
final Phaser phaser = new Phaser(); |
566 |
assertEquals(0, phaser.register()); |
567 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
568 |
|
569 |
Thread t = newStartedThread(new CheckedRunnable() { |
570 |
public void realRun() { |
571 |
Thread.currentThread().interrupt(); |
572 |
assertEquals(0, phaser.register()); |
573 |
pleaseInterrupt.countDown(); |
574 |
assertTrue(Thread.currentThread().isInterrupted()); |
575 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
576 |
assertTrue(Thread.currentThread().isInterrupted()); |
577 |
}}); |
578 |
|
579 |
await(pleaseInterrupt); |
580 |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
581 |
Thread.currentThread().interrupt(); |
582 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
583 |
assertTrue(Thread.interrupted()); |
584 |
awaitTermination(t); |
585 |
} |
586 |
|
587 |
/** |
588 |
* arriveAndAwaitAdvance continues waiting if interrupted while waiting |
589 |
*/ |
590 |
public void testArriveAndAwaitAdvanceBeforeInterrupt() { |
591 |
final Phaser phaser = new Phaser(); |
592 |
assertEquals(0, phaser.register()); |
593 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
594 |
|
595 |
Thread t = newStartedThread(new CheckedRunnable() { |
596 |
public void realRun() { |
597 |
assertEquals(0, phaser.register()); |
598 |
assertFalse(Thread.currentThread().isInterrupted()); |
599 |
pleaseInterrupt.countDown(); |
600 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
601 |
assertTrue(Thread.currentThread().isInterrupted()); |
602 |
}}); |
603 |
|
604 |
await(pleaseInterrupt); |
605 |
waitForThreadToEnterWaitState(t, SHORT_DELAY_MS); |
606 |
t.interrupt(); |
607 |
Thread.currentThread().interrupt(); |
608 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
609 |
assertTrue(Thread.interrupted()); |
610 |
awaitTermination(t); |
611 |
} |
612 |
|
613 |
/** |
614 |
* awaitAdvance atomically waits for all parties within the same phase to |
615 |
* complete before continuing |
616 |
*/ |
617 |
public void testAwaitAdvance4() { |
618 |
final Phaser phaser = new Phaser(4); |
619 |
final AtomicInteger count = new AtomicInteger(0); |
620 |
List<Thread> threads = new ArrayList<Thread>(); |
621 |
for (int i = 0; i < 4; i++) |
622 |
threads.add(newStartedThread(new CheckedRunnable() { |
623 |
public void realRun() { |
624 |
for (int k = 0; k < 3; k++) { |
625 |
assertEquals(2*k+1, phaser.arriveAndAwaitAdvance()); |
626 |
count.incrementAndGet(); |
627 |
assertEquals(2*k+1, phaser.arrive()); |
628 |
assertEquals(2*k+2, phaser.awaitAdvance(2*k+1)); |
629 |
assertEquals(4*(k+1), count.get()); |
630 |
}}})); |
631 |
|
632 |
for (Thread thread : threads) |
633 |
awaitTermination(thread); |
634 |
} |
635 |
|
636 |
/** |
637 |
* awaitAdvance returns the current phase |
638 |
*/ |
639 |
public void testAwaitAdvance5() { |
640 |
final Phaser phaser = new Phaser(1); |
641 |
assertEquals(1, phaser.awaitAdvance(phaser.arrive())); |
642 |
assertEquals(1, phaser.getPhase()); |
643 |
assertEquals(1, phaser.register()); |
644 |
List<Thread> threads = new ArrayList<Thread>(); |
645 |
for (int i = 0; i < 8; i++) { |
646 |
final CountDownLatch latch = new CountDownLatch(1); |
647 |
final boolean goesFirst = ((i & 1) == 0); |
648 |
threads.add(newStartedThread(new CheckedRunnable() { |
649 |
public void realRun() { |
650 |
if (goesFirst) |
651 |
latch.countDown(); |
652 |
else |
653 |
await(latch); |
654 |
phaser.arrive(); |
655 |
}})); |
656 |
if (goesFirst) |
657 |
await(latch); |
658 |
else |
659 |
latch.countDown(); |
660 |
assertEquals(i + 2, phaser.awaitAdvance(phaser.arrive())); |
661 |
assertEquals(i + 2, phaser.getPhase()); |
662 |
} |
663 |
for (Thread thread : threads) |
664 |
awaitTermination(thread); |
665 |
} |
666 |
|
667 |
/** |
668 |
* awaitAdvance returns the current phase in child phasers |
669 |
*/ |
670 |
public void testAwaitAdvanceTieredPhaser() throws Exception { |
671 |
final Phaser parent = new Phaser(); |
672 |
final List<Phaser> zeroPartyChildren = new ArrayList<Phaser>(3); |
673 |
final List<Phaser> onePartyChildren = new ArrayList<Phaser>(3); |
674 |
for (int i = 0; i < 3; i++) { |
675 |
zeroPartyChildren.add(new Phaser(parent, 0)); |
676 |
onePartyChildren.add(new Phaser(parent, 1)); |
677 |
} |
678 |
final List<Phaser> phasers = new ArrayList<Phaser>(); |
679 |
phasers.addAll(zeroPartyChildren); |
680 |
phasers.addAll(onePartyChildren); |
681 |
phasers.add(parent); |
682 |
for (Phaser phaser : phasers) { |
683 |
assertEquals(-42, phaser.awaitAdvance(-42)); |
684 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42)); |
685 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42, SMALL_DELAY_MS, MILLISECONDS)); |
686 |
} |
687 |
|
688 |
for (Phaser child : onePartyChildren) |
689 |
assertEquals(0, child.arrive()); |
690 |
for (Phaser phaser : phasers) { |
691 |
assertEquals(-42, phaser.awaitAdvance(-42)); |
692 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42)); |
693 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42, SMALL_DELAY_MS, MILLISECONDS)); |
694 |
assertEquals(1, phaser.awaitAdvance(0)); |
695 |
assertEquals(1, phaser.awaitAdvanceInterruptibly(0)); |
696 |
assertEquals(1, phaser.awaitAdvanceInterruptibly(0, SMALL_DELAY_MS, MILLISECONDS)); |
697 |
} |
698 |
|
699 |
for (Phaser child : onePartyChildren) |
700 |
assertEquals(1, child.arrive()); |
701 |
for (Phaser phaser : phasers) { |
702 |
assertEquals(-42, phaser.awaitAdvance(-42)); |
703 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42)); |
704 |
assertEquals(-42, phaser.awaitAdvanceInterruptibly(-42, SMALL_DELAY_MS, MILLISECONDS)); |
705 |
assertEquals(2, phaser.awaitAdvance(0)); |
706 |
assertEquals(2, phaser.awaitAdvanceInterruptibly(0)); |
707 |
assertEquals(2, phaser.awaitAdvanceInterruptibly(0, SMALL_DELAY_MS, MILLISECONDS)); |
708 |
assertEquals(2, phaser.awaitAdvance(1)); |
709 |
assertEquals(2, phaser.awaitAdvanceInterruptibly(1)); |
710 |
assertEquals(2, phaser.awaitAdvanceInterruptibly(1, SMALL_DELAY_MS, MILLISECONDS)); |
711 |
} |
712 |
} |
713 |
|
714 |
/** |
715 |
* awaitAdvance returns when the phaser is externally terminated |
716 |
*/ |
717 |
public void testAwaitAdvance6() { |
718 |
final Phaser phaser = new Phaser(3); |
719 |
final CountDownLatch pleaseForceTermination = new CountDownLatch(2); |
720 |
final List<Thread> threads = new ArrayList<Thread>(); |
721 |
for (int i = 0; i < 2; i++) { |
722 |
Runnable r = new CheckedRunnable() { |
723 |
public void realRun() { |
724 |
assertEquals(0, phaser.arrive()); |
725 |
pleaseForceTermination.countDown(); |
726 |
assertTrue(phaser.awaitAdvance(0) < 0); |
727 |
assertTrue(phaser.isTerminated()); |
728 |
assertTrue(phaser.getPhase() < 0); |
729 |
assertEquals(0, phaser.getPhase() + Integer.MIN_VALUE); |
730 |
assertEquals(3, phaser.getRegisteredParties()); |
731 |
}}; |
732 |
threads.add(newStartedThread(r)); |
733 |
} |
734 |
await(pleaseForceTermination); |
735 |
phaser.forceTermination(); |
736 |
assertTrue(phaser.isTerminated()); |
737 |
assertEquals(0, phaser.getPhase() + Integer.MIN_VALUE); |
738 |
for (Thread thread : threads) |
739 |
awaitTermination(thread); |
740 |
assertEquals(3, phaser.getRegisteredParties()); |
741 |
} |
742 |
|
743 |
/** |
744 |
* arriveAndAwaitAdvance throws IllegalStateException with no |
745 |
* unarrived parties |
746 |
*/ |
747 |
public void testArriveAndAwaitAdvance1() { |
748 |
try { |
749 |
Phaser phaser = new Phaser(); |
750 |
phaser.arriveAndAwaitAdvance(); |
751 |
shouldThrow(); |
752 |
} catch (IllegalStateException success) {} |
753 |
} |
754 |
|
755 |
/** |
756 |
* arriveAndAwaitAdvance waits for all threads to arrive, the |
757 |
* number of arrived parties is the same number that is accounted |
758 |
* for when the main thread awaitsAdvance |
759 |
*/ |
760 |
public void testArriveAndAwaitAdvance3() { |
761 |
final Phaser phaser = new Phaser(1); |
762 |
final int THREADS = 3; |
763 |
final CountDownLatch pleaseArrive = new CountDownLatch(THREADS); |
764 |
final List<Thread> threads = new ArrayList<Thread>(); |
765 |
for (int i = 0; i < THREADS; i++) |
766 |
threads.add(newStartedThread(new CheckedRunnable() { |
767 |
public void realRun() { |
768 |
assertEquals(0, phaser.register()); |
769 |
pleaseArrive.countDown(); |
770 |
assertEquals(1, phaser.arriveAndAwaitAdvance()); |
771 |
}})); |
772 |
|
773 |
await(pleaseArrive); |
774 |
long startTime = System.nanoTime(); |
775 |
while (phaser.getArrivedParties() < THREADS) |
776 |
Thread.yield(); |
777 |
assertEquals(THREADS, phaser.getArrivedParties()); |
778 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
779 |
for (Thread thread : threads) |
780 |
waitForThreadToEnterWaitState(thread, SHORT_DELAY_MS); |
781 |
for (Thread thread : threads) |
782 |
assertTrue(thread.isAlive()); |
783 |
assertState(phaser, 0, THREADS + 1, 1); |
784 |
phaser.arriveAndAwaitAdvance(); |
785 |
for (Thread thread : threads) |
786 |
awaitTermination(thread); |
787 |
assertState(phaser, 1, THREADS + 1, THREADS + 1); |
788 |
} |
789 |
|
790 |
} |