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/licenses/publicdomain |
5 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
* Pat Fisher, Mike Judd. |
7 |
*/ |
8 |
|
9 |
import junit.framework.*; |
10 |
import java.util.concurrent.locks.*; |
11 |
import java.util.concurrent.*; |
12 |
import java.util.*; |
13 |
import java.io.*; |
14 |
|
15 |
public class ReentrantLockTest extends JSR166TestCase { |
16 |
public static void main(String[] args) { |
17 |
junit.textui.TestRunner.run (suite()); |
18 |
} |
19 |
public static Test suite() { |
20 |
return new TestSuite(ReentrantLockTest.class); |
21 |
} |
22 |
|
23 |
/** |
24 |
* A runnable calling lockInterruptibly |
25 |
*/ |
26 |
class InterruptibleLockRunnable implements Runnable { |
27 |
final ReentrantLock lock; |
28 |
InterruptibleLockRunnable(ReentrantLock l) { lock = l; } |
29 |
public void run() { |
30 |
try { |
31 |
lock.lockInterruptibly(); |
32 |
} catch(InterruptedException success){} |
33 |
} |
34 |
} |
35 |
|
36 |
|
37 |
/** |
38 |
* A runnable calling lockInterruptibly that expects to be |
39 |
* interrupted |
40 |
*/ |
41 |
class InterruptedLockRunnable implements Runnable { |
42 |
final ReentrantLock lock; |
43 |
InterruptedLockRunnable(ReentrantLock l) { lock = l; } |
44 |
public void run() { |
45 |
try { |
46 |
lock.lockInterruptibly(); |
47 |
threadShouldThrow(); |
48 |
} catch(InterruptedException success){} |
49 |
} |
50 |
} |
51 |
|
52 |
/** |
53 |
* Subclass to expose protected methods |
54 |
*/ |
55 |
static class PublicReentrantLock extends ReentrantLock { |
56 |
PublicReentrantLock() { super(); } |
57 |
public Collection<Thread> getQueuedThreads() { |
58 |
return super.getQueuedThreads(); |
59 |
} |
60 |
public Collection<Thread> getWaitingThreads(Condition c) { |
61 |
return super.getWaitingThreads(c); |
62 |
} |
63 |
|
64 |
|
65 |
} |
66 |
|
67 |
/** |
68 |
* Constructor sets given fairness |
69 |
*/ |
70 |
public void testConstructor() { |
71 |
ReentrantLock rl = new ReentrantLock(); |
72 |
assertFalse(rl.isFair()); |
73 |
ReentrantLock r2 = new ReentrantLock(true); |
74 |
assertTrue(r2.isFair()); |
75 |
} |
76 |
|
77 |
/** |
78 |
* locking an unlocked lock succeeds |
79 |
*/ |
80 |
public void testLock() { |
81 |
ReentrantLock rl = new ReentrantLock(); |
82 |
rl.lock(); |
83 |
assertTrue(rl.isLocked()); |
84 |
rl.unlock(); |
85 |
} |
86 |
|
87 |
/** |
88 |
* locking an unlocked fair lock succeeds |
89 |
*/ |
90 |
public void testFairLock() { |
91 |
ReentrantLock rl = new ReentrantLock(true); |
92 |
rl.lock(); |
93 |
assertTrue(rl.isLocked()); |
94 |
rl.unlock(); |
95 |
} |
96 |
|
97 |
/** |
98 |
* Unlocking an unlocked lock throws IllegalMonitorStateException |
99 |
*/ |
100 |
public void testUnlock_IllegalMonitorStateException() { |
101 |
ReentrantLock rl = new ReentrantLock(); |
102 |
try { |
103 |
rl.unlock(); |
104 |
shouldThrow(); |
105 |
|
106 |
} catch(IllegalMonitorStateException success){} |
107 |
} |
108 |
|
109 |
/** |
110 |
* tryLock on an unlocked lock succeeds |
111 |
*/ |
112 |
public void testTryLock() { |
113 |
ReentrantLock rl = new ReentrantLock(); |
114 |
assertTrue(rl.tryLock()); |
115 |
assertTrue(rl.isLocked()); |
116 |
rl.unlock(); |
117 |
} |
118 |
|
119 |
|
120 |
/** |
121 |
* hasQueuedThreads reports whether there are waiting threads |
122 |
*/ |
123 |
public void testhasQueuedThreads() { |
124 |
final ReentrantLock lock = new ReentrantLock(); |
125 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
126 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
127 |
try { |
128 |
assertFalse(lock.hasQueuedThreads()); |
129 |
lock.lock(); |
130 |
t1.start(); |
131 |
Thread.sleep(SHORT_DELAY_MS); |
132 |
assertTrue(lock.hasQueuedThreads()); |
133 |
t2.start(); |
134 |
Thread.sleep(SHORT_DELAY_MS); |
135 |
assertTrue(lock.hasQueuedThreads()); |
136 |
t1.interrupt(); |
137 |
Thread.sleep(SHORT_DELAY_MS); |
138 |
assertTrue(lock.hasQueuedThreads()); |
139 |
lock.unlock(); |
140 |
Thread.sleep(SHORT_DELAY_MS); |
141 |
assertFalse(lock.hasQueuedThreads()); |
142 |
t1.join(); |
143 |
t2.join(); |
144 |
} catch(Exception e){ |
145 |
unexpectedException(); |
146 |
} |
147 |
} |
148 |
|
149 |
/** |
150 |
* getQueueLength reports number of waiting threads |
151 |
*/ |
152 |
public void testGetQueueLength() { |
153 |
final ReentrantLock lock = new ReentrantLock(); |
154 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
155 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
156 |
try { |
157 |
assertEquals(0, lock.getQueueLength()); |
158 |
lock.lock(); |
159 |
t1.start(); |
160 |
Thread.sleep(SHORT_DELAY_MS); |
161 |
assertEquals(1, lock.getQueueLength()); |
162 |
t2.start(); |
163 |
Thread.sleep(SHORT_DELAY_MS); |
164 |
assertEquals(2, lock.getQueueLength()); |
165 |
t1.interrupt(); |
166 |
Thread.sleep(SHORT_DELAY_MS); |
167 |
assertEquals(1, lock.getQueueLength()); |
168 |
lock.unlock(); |
169 |
Thread.sleep(SHORT_DELAY_MS); |
170 |
assertEquals(0, lock.getQueueLength()); |
171 |
t1.join(); |
172 |
t2.join(); |
173 |
} catch(Exception e){ |
174 |
unexpectedException(); |
175 |
} |
176 |
} |
177 |
|
178 |
/** |
179 |
* getQueuedThreads includes waiting threads |
180 |
*/ |
181 |
public void testGetQueuedThreads() { |
182 |
final PublicReentrantLock lock = new PublicReentrantLock(); |
183 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
184 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
185 |
try { |
186 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
187 |
lock.lock(); |
188 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
189 |
t1.start(); |
190 |
Thread.sleep(SHORT_DELAY_MS); |
191 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
192 |
t2.start(); |
193 |
Thread.sleep(SHORT_DELAY_MS); |
194 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
195 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
196 |
t1.interrupt(); |
197 |
Thread.sleep(SHORT_DELAY_MS); |
198 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
199 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
200 |
lock.unlock(); |
201 |
Thread.sleep(SHORT_DELAY_MS); |
202 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
203 |
t1.join(); |
204 |
t2.join(); |
205 |
} catch(Exception e){ |
206 |
unexpectedException(); |
207 |
} |
208 |
} |
209 |
|
210 |
|
211 |
/** |
212 |
* timed tryLock is interruptible. |
213 |
*/ |
214 |
public void testInterruptedException2() { |
215 |
final ReentrantLock lock = new ReentrantLock(); |
216 |
lock.lock(); |
217 |
Thread t = new Thread(new Runnable() { |
218 |
public void run() { |
219 |
try { |
220 |
lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS); |
221 |
threadShouldThrow(); |
222 |
} catch(InterruptedException success){} |
223 |
} |
224 |
}); |
225 |
try { |
226 |
t.start(); |
227 |
t.interrupt(); |
228 |
} catch(Exception e){ |
229 |
unexpectedException(); |
230 |
} |
231 |
} |
232 |
|
233 |
|
234 |
/** |
235 |
* TryLock on a locked lock fails |
236 |
*/ |
237 |
public void testTryLockWhenLocked() { |
238 |
final ReentrantLock lock = new ReentrantLock(); |
239 |
lock.lock(); |
240 |
Thread t = new Thread(new Runnable() { |
241 |
public void run() { |
242 |
threadAssertFalse(lock.tryLock()); |
243 |
} |
244 |
}); |
245 |
try { |
246 |
t.start(); |
247 |
t.join(); |
248 |
lock.unlock(); |
249 |
} catch(Exception e){ |
250 |
unexpectedException(); |
251 |
} |
252 |
} |
253 |
|
254 |
/** |
255 |
* Timed tryLock on a locked lock times out |
256 |
*/ |
257 |
public void testTryLock_Timeout() { |
258 |
final ReentrantLock lock = new ReentrantLock(); |
259 |
lock.lock(); |
260 |
Thread t = new Thread(new Runnable() { |
261 |
public void run() { |
262 |
try { |
263 |
threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS)); |
264 |
} catch (Exception ex) { |
265 |
threadUnexpectedException(); |
266 |
} |
267 |
} |
268 |
}); |
269 |
try { |
270 |
t.start(); |
271 |
t.join(); |
272 |
lock.unlock(); |
273 |
} catch(Exception e){ |
274 |
unexpectedException(); |
275 |
} |
276 |
} |
277 |
|
278 |
/** |
279 |
* getHoldCount returns number of recursive holds |
280 |
*/ |
281 |
public void testGetHoldCount() { |
282 |
ReentrantLock lock = new ReentrantLock(); |
283 |
for(int i = 1; i <= SIZE; i++) { |
284 |
lock.lock(); |
285 |
assertEquals(i,lock.getHoldCount()); |
286 |
} |
287 |
for(int i = SIZE; i > 0; i--) { |
288 |
lock.unlock(); |
289 |
assertEquals(i-1,lock.getHoldCount()); |
290 |
} |
291 |
} |
292 |
|
293 |
|
294 |
/** |
295 |
* isLocked is true when locked and false when not |
296 |
*/ |
297 |
public void testIsLocked() { |
298 |
final ReentrantLock lock = new ReentrantLock(); |
299 |
lock.lock(); |
300 |
assertTrue(lock.isLocked()); |
301 |
lock.unlock(); |
302 |
assertFalse(lock.isLocked()); |
303 |
Thread t = new Thread(new Runnable() { |
304 |
public void run() { |
305 |
lock.lock(); |
306 |
try { |
307 |
Thread.sleep(SMALL_DELAY_MS); |
308 |
} |
309 |
catch(Exception e) { |
310 |
threadUnexpectedException(); |
311 |
} |
312 |
lock.unlock(); |
313 |
} |
314 |
}); |
315 |
try { |
316 |
t.start(); |
317 |
Thread.sleep(SHORT_DELAY_MS); |
318 |
assertTrue(lock.isLocked()); |
319 |
t.join(); |
320 |
assertFalse(lock.isLocked()); |
321 |
} catch(Exception e){ |
322 |
unexpectedException(); |
323 |
} |
324 |
} |
325 |
|
326 |
|
327 |
/** |
328 |
* lockInterruptibly is interruptible. |
329 |
*/ |
330 |
public void testLockInterruptibly1() { |
331 |
final ReentrantLock lock = new ReentrantLock(); |
332 |
lock.lock(); |
333 |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
334 |
try { |
335 |
t.start(); |
336 |
t.interrupt(); |
337 |
lock.unlock(); |
338 |
t.join(); |
339 |
} catch(Exception e){ |
340 |
unexpectedException(); |
341 |
} |
342 |
} |
343 |
|
344 |
/** |
345 |
* lockInterruptibly succeeds when unlocked, else is interruptible |
346 |
*/ |
347 |
public void testLockInterruptibly2() { |
348 |
final ReentrantLock lock = new ReentrantLock(); |
349 |
try { |
350 |
lock.lockInterruptibly(); |
351 |
} catch(Exception e) { |
352 |
unexpectedException(); |
353 |
} |
354 |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
355 |
try { |
356 |
t.start(); |
357 |
t.interrupt(); |
358 |
assertTrue(lock.isLocked()); |
359 |
assertTrue(lock.isHeldByCurrentThread()); |
360 |
t.join(); |
361 |
} catch(Exception e){ |
362 |
unexpectedException(); |
363 |
} |
364 |
} |
365 |
|
366 |
/** |
367 |
* Calling await without holding lock throws IllegalMonitorStateException |
368 |
*/ |
369 |
public void testAwait_IllegalMonitor() { |
370 |
final ReentrantLock lock = new ReentrantLock(); |
371 |
final Condition c = lock.newCondition(); |
372 |
try { |
373 |
c.await(); |
374 |
shouldThrow(); |
375 |
} |
376 |
catch (IllegalMonitorStateException success) { |
377 |
} |
378 |
catch (Exception ex) { |
379 |
unexpectedException(); |
380 |
} |
381 |
} |
382 |
|
383 |
/** |
384 |
* Calling signal without holding lock throws IllegalMonitorStateException |
385 |
*/ |
386 |
public void testSignal_IllegalMonitor() { |
387 |
final ReentrantLock lock = new ReentrantLock(); |
388 |
final Condition c = lock.newCondition(); |
389 |
try { |
390 |
c.signal(); |
391 |
shouldThrow(); |
392 |
} |
393 |
catch (IllegalMonitorStateException success) { |
394 |
} |
395 |
catch (Exception ex) { |
396 |
unexpectedException(); |
397 |
} |
398 |
} |
399 |
|
400 |
/** |
401 |
* awaitNanos without a signal times out |
402 |
*/ |
403 |
public void testAwaitNanos_Timeout() { |
404 |
final ReentrantLock lock = new ReentrantLock(); |
405 |
final Condition c = lock.newCondition(); |
406 |
try { |
407 |
lock.lock(); |
408 |
long t = c.awaitNanos(100); |
409 |
assertTrue(t <= 0); |
410 |
lock.unlock(); |
411 |
} |
412 |
catch (Exception ex) { |
413 |
unexpectedException(); |
414 |
} |
415 |
} |
416 |
|
417 |
/** |
418 |
* timed await without a signal times out |
419 |
*/ |
420 |
public void testAwait_Timeout() { |
421 |
final ReentrantLock lock = new ReentrantLock(); |
422 |
final Condition c = lock.newCondition(); |
423 |
try { |
424 |
lock.lock(); |
425 |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
426 |
lock.unlock(); |
427 |
} |
428 |
catch (Exception ex) { |
429 |
unexpectedException(); |
430 |
} |
431 |
} |
432 |
|
433 |
/** |
434 |
* awaitUntil without a signal times out |
435 |
*/ |
436 |
public void testAwaitUntil_Timeout() { |
437 |
final ReentrantLock lock = new ReentrantLock(); |
438 |
final Condition c = lock.newCondition(); |
439 |
try { |
440 |
lock.lock(); |
441 |
java.util.Date d = new java.util.Date(); |
442 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
443 |
lock.unlock(); |
444 |
} |
445 |
catch (Exception ex) { |
446 |
unexpectedException(); |
447 |
} |
448 |
} |
449 |
|
450 |
/** |
451 |
* await returns when signalled |
452 |
*/ |
453 |
public void testAwait() { |
454 |
final ReentrantLock lock = new ReentrantLock(); |
455 |
final Condition c = lock.newCondition(); |
456 |
Thread t = new Thread(new Runnable() { |
457 |
public void run() { |
458 |
try { |
459 |
lock.lock(); |
460 |
c.await(); |
461 |
lock.unlock(); |
462 |
} |
463 |
catch(InterruptedException e) { |
464 |
threadUnexpectedException(); |
465 |
} |
466 |
} |
467 |
}); |
468 |
|
469 |
try { |
470 |
t.start(); |
471 |
Thread.sleep(SHORT_DELAY_MS); |
472 |
lock.lock(); |
473 |
c.signal(); |
474 |
lock.unlock(); |
475 |
t.join(SHORT_DELAY_MS); |
476 |
assertFalse(t.isAlive()); |
477 |
} |
478 |
catch (Exception ex) { |
479 |
unexpectedException(); |
480 |
} |
481 |
} |
482 |
|
483 |
/** |
484 |
* hasWaiters throws NPE if null |
485 |
*/ |
486 |
public void testHasWaitersNPE() { |
487 |
final ReentrantLock lock = new ReentrantLock(); |
488 |
try { |
489 |
lock.hasWaiters(null); |
490 |
shouldThrow(); |
491 |
} catch (NullPointerException success) { |
492 |
} catch (Exception ex) { |
493 |
unexpectedException(); |
494 |
} |
495 |
} |
496 |
|
497 |
/** |
498 |
* getWaitQueueLength throws NPE if null |
499 |
*/ |
500 |
public void testGetWaitQueueLengthNPE() { |
501 |
final ReentrantLock lock = new ReentrantLock(); |
502 |
try { |
503 |
lock.getWaitQueueLength(null); |
504 |
shouldThrow(); |
505 |
} catch (NullPointerException success) { |
506 |
} catch (Exception ex) { |
507 |
unexpectedException(); |
508 |
} |
509 |
} |
510 |
|
511 |
|
512 |
/** |
513 |
* getWaitingThreads throws NPE if null |
514 |
*/ |
515 |
public void testGetWaitingThreadsNPE() { |
516 |
final PublicReentrantLock lock = new PublicReentrantLock(); |
517 |
try { |
518 |
lock.getWaitingThreads(null); |
519 |
shouldThrow(); |
520 |
} catch (NullPointerException success) { |
521 |
} catch (Exception ex) { |
522 |
unexpectedException(); |
523 |
} |
524 |
} |
525 |
|
526 |
|
527 |
/** |
528 |
* hasWaiters throws IAE if not owned |
529 |
*/ |
530 |
public void testHasWaitersIAE() { |
531 |
final ReentrantLock lock = new ReentrantLock(); |
532 |
final Condition c = (lock.newCondition()); |
533 |
final ReentrantLock lock2 = new ReentrantLock(); |
534 |
try { |
535 |
lock2.hasWaiters(c); |
536 |
shouldThrow(); |
537 |
} catch (IllegalArgumentException success) { |
538 |
} catch (Exception ex) { |
539 |
unexpectedException(); |
540 |
} |
541 |
} |
542 |
|
543 |
/** |
544 |
* hasWaiters throws IMSE if not locked |
545 |
*/ |
546 |
public void testHasWaitersIMSE() { |
547 |
final ReentrantLock lock = new ReentrantLock(); |
548 |
final Condition c = (lock.newCondition()); |
549 |
try { |
550 |
lock.hasWaiters(c); |
551 |
shouldThrow(); |
552 |
} catch (IllegalMonitorStateException success) { |
553 |
} catch (Exception ex) { |
554 |
unexpectedException(); |
555 |
} |
556 |
} |
557 |
|
558 |
|
559 |
/** |
560 |
* getWaitQueueLength throws IAE if not owned |
561 |
*/ |
562 |
public void testGetWaitQueueLengthIAE() { |
563 |
final ReentrantLock lock = new ReentrantLock(); |
564 |
final Condition c = (lock.newCondition()); |
565 |
final ReentrantLock lock2 = new ReentrantLock(); |
566 |
try { |
567 |
lock2.getWaitQueueLength(c); |
568 |
shouldThrow(); |
569 |
} catch (IllegalArgumentException success) { |
570 |
} catch (Exception ex) { |
571 |
unexpectedException(); |
572 |
} |
573 |
} |
574 |
|
575 |
/** |
576 |
* getWaitQueueLength throws IMSE if not locked |
577 |
*/ |
578 |
public void testGetWaitQueueLengthIMSE() { |
579 |
final ReentrantLock lock = new ReentrantLock(); |
580 |
final Condition c = (lock.newCondition()); |
581 |
try { |
582 |
lock.getWaitQueueLength(c); |
583 |
shouldThrow(); |
584 |
} catch (IllegalMonitorStateException success) { |
585 |
} catch (Exception ex) { |
586 |
unexpectedException(); |
587 |
} |
588 |
} |
589 |
|
590 |
|
591 |
/** |
592 |
* getWaitingThreads throws IAE if not owned |
593 |
*/ |
594 |
public void testGetWaitingThreadsIAE() { |
595 |
final PublicReentrantLock lock = new PublicReentrantLock(); |
596 |
final Condition c = (lock.newCondition()); |
597 |
final PublicReentrantLock lock2 = new PublicReentrantLock(); |
598 |
try { |
599 |
lock2.getWaitingThreads(c); |
600 |
shouldThrow(); |
601 |
} catch (IllegalArgumentException success) { |
602 |
} catch (Exception ex) { |
603 |
unexpectedException(); |
604 |
} |
605 |
} |
606 |
|
607 |
/** |
608 |
* getWaitingThreads throws IMSE if not locked |
609 |
*/ |
610 |
public void testGetWaitingThreadsIMSE() { |
611 |
final PublicReentrantLock lock = new PublicReentrantLock(); |
612 |
final Condition c = (lock.newCondition()); |
613 |
try { |
614 |
lock.getWaitingThreads(c); |
615 |
shouldThrow(); |
616 |
} catch (IllegalMonitorStateException success) { |
617 |
} catch (Exception ex) { |
618 |
unexpectedException(); |
619 |
} |
620 |
} |
621 |
|
622 |
|
623 |
|
624 |
/** |
625 |
* hasWaiters returns true when a thread is waiting, else false |
626 |
*/ |
627 |
public void testHasWaiters() { |
628 |
final ReentrantLock lock = new ReentrantLock(); |
629 |
final Condition c = lock.newCondition(); |
630 |
Thread t = new Thread(new Runnable() { |
631 |
public void run() { |
632 |
try { |
633 |
lock.lock(); |
634 |
threadAssertFalse(lock.hasWaiters(c)); |
635 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
636 |
c.await(); |
637 |
lock.unlock(); |
638 |
} |
639 |
catch(InterruptedException e) { |
640 |
threadUnexpectedException(); |
641 |
} |
642 |
} |
643 |
}); |
644 |
|
645 |
try { |
646 |
t.start(); |
647 |
Thread.sleep(SHORT_DELAY_MS); |
648 |
lock.lock(); |
649 |
assertTrue(lock.hasWaiters(c)); |
650 |
assertEquals(1, lock.getWaitQueueLength(c)); |
651 |
c.signal(); |
652 |
lock.unlock(); |
653 |
Thread.sleep(SHORT_DELAY_MS); |
654 |
lock.lock(); |
655 |
assertFalse(lock.hasWaiters(c)); |
656 |
assertEquals(0, lock.getWaitQueueLength(c)); |
657 |
lock.unlock(); |
658 |
t.join(SHORT_DELAY_MS); |
659 |
assertFalse(t.isAlive()); |
660 |
} |
661 |
catch (Exception ex) { |
662 |
unexpectedException(); |
663 |
} |
664 |
} |
665 |
|
666 |
/** |
667 |
* getWaitQueueLength returns number of waiting threads |
668 |
*/ |
669 |
public void testGetWaitQueueLength() { |
670 |
final ReentrantLock lock = new ReentrantLock(); |
671 |
final Condition c = lock.newCondition(); |
672 |
Thread t1 = new Thread(new Runnable() { |
673 |
public void run() { |
674 |
try { |
675 |
lock.lock(); |
676 |
threadAssertFalse(lock.hasWaiters(c)); |
677 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
678 |
c.await(); |
679 |
lock.unlock(); |
680 |
} |
681 |
catch(InterruptedException e) { |
682 |
threadUnexpectedException(); |
683 |
} |
684 |
} |
685 |
}); |
686 |
|
687 |
Thread t2 = new Thread(new Runnable() { |
688 |
public void run() { |
689 |
try { |
690 |
lock.lock(); |
691 |
threadAssertTrue(lock.hasWaiters(c)); |
692 |
threadAssertEquals(1, lock.getWaitQueueLength(c)); |
693 |
c.await(); |
694 |
lock.unlock(); |
695 |
} |
696 |
catch(InterruptedException e) { |
697 |
threadUnexpectedException(); |
698 |
} |
699 |
} |
700 |
}); |
701 |
|
702 |
try { |
703 |
t1.start(); |
704 |
Thread.sleep(SHORT_DELAY_MS); |
705 |
t2.start(); |
706 |
Thread.sleep(SHORT_DELAY_MS); |
707 |
lock.lock(); |
708 |
assertTrue(lock.hasWaiters(c)); |
709 |
assertEquals(2, lock.getWaitQueueLength(c)); |
710 |
c.signalAll(); |
711 |
lock.unlock(); |
712 |
Thread.sleep(SHORT_DELAY_MS); |
713 |
lock.lock(); |
714 |
assertFalse(lock.hasWaiters(c)); |
715 |
assertEquals(0, lock.getWaitQueueLength(c)); |
716 |
lock.unlock(); |
717 |
t1.join(SHORT_DELAY_MS); |
718 |
t2.join(SHORT_DELAY_MS); |
719 |
assertFalse(t1.isAlive()); |
720 |
assertFalse(t2.isAlive()); |
721 |
} |
722 |
catch (Exception ex) { |
723 |
unexpectedException(); |
724 |
} |
725 |
} |
726 |
|
727 |
/** |
728 |
* getWaitingThreads returns only and all waiting threads |
729 |
*/ |
730 |
public void testGetWaitingThreads() { |
731 |
final PublicReentrantLock lock = new PublicReentrantLock(); |
732 |
final Condition c = lock.newCondition(); |
733 |
Thread t1 = new Thread(new Runnable() { |
734 |
public void run() { |
735 |
try { |
736 |
lock.lock(); |
737 |
threadAssertTrue(lock.getWaitingThreads(c).isEmpty()); |
738 |
c.await(); |
739 |
lock.unlock(); |
740 |
} |
741 |
catch(InterruptedException e) { |
742 |
threadUnexpectedException(); |
743 |
} |
744 |
} |
745 |
}); |
746 |
|
747 |
Thread t2 = new Thread(new Runnable() { |
748 |
public void run() { |
749 |
try { |
750 |
lock.lock(); |
751 |
threadAssertFalse(lock.getWaitingThreads(c).isEmpty()); |
752 |
c.await(); |
753 |
lock.unlock(); |
754 |
} |
755 |
catch(InterruptedException e) { |
756 |
threadUnexpectedException(); |
757 |
} |
758 |
} |
759 |
}); |
760 |
|
761 |
try { |
762 |
lock.lock(); |
763 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
764 |
lock.unlock(); |
765 |
t1.start(); |
766 |
Thread.sleep(SHORT_DELAY_MS); |
767 |
t2.start(); |
768 |
Thread.sleep(SHORT_DELAY_MS); |
769 |
lock.lock(); |
770 |
assertTrue(lock.hasWaiters(c)); |
771 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
772 |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
773 |
c.signalAll(); |
774 |
lock.unlock(); |
775 |
Thread.sleep(SHORT_DELAY_MS); |
776 |
lock.lock(); |
777 |
assertFalse(lock.hasWaiters(c)); |
778 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
779 |
lock.unlock(); |
780 |
t1.join(SHORT_DELAY_MS); |
781 |
t2.join(SHORT_DELAY_MS); |
782 |
assertFalse(t1.isAlive()); |
783 |
assertFalse(t2.isAlive()); |
784 |
} |
785 |
catch (Exception ex) { |
786 |
unexpectedException(); |
787 |
} |
788 |
} |
789 |
|
790 |
|
791 |
|
792 |
/** |
793 |
* awaitUninterruptibly doesn't abort on interrupt |
794 |
*/ |
795 |
public void testAwaitUninterruptibly() { |
796 |
final ReentrantLock lock = new ReentrantLock(); |
797 |
final Condition c = lock.newCondition(); |
798 |
Thread t = new Thread(new Runnable() { |
799 |
public void run() { |
800 |
lock.lock(); |
801 |
c.awaitUninterruptibly(); |
802 |
lock.unlock(); |
803 |
} |
804 |
}); |
805 |
|
806 |
try { |
807 |
t.start(); |
808 |
Thread.sleep(SHORT_DELAY_MS); |
809 |
t.interrupt(); |
810 |
lock.lock(); |
811 |
c.signal(); |
812 |
lock.unlock(); |
813 |
assert(t.isInterrupted()); |
814 |
t.join(SHORT_DELAY_MS); |
815 |
assertFalse(t.isAlive()); |
816 |
} |
817 |
catch (Exception ex) { |
818 |
unexpectedException(); |
819 |
} |
820 |
} |
821 |
|
822 |
/** |
823 |
* await is interruptible |
824 |
*/ |
825 |
public void testAwait_Interrupt() { |
826 |
final ReentrantLock lock = new ReentrantLock(); |
827 |
final Condition c = lock.newCondition(); |
828 |
Thread t = new Thread(new Runnable() { |
829 |
public void run() { |
830 |
try { |
831 |
lock.lock(); |
832 |
c.await(); |
833 |
lock.unlock(); |
834 |
threadShouldThrow(); |
835 |
} |
836 |
catch(InterruptedException success) { |
837 |
} |
838 |
} |
839 |
}); |
840 |
|
841 |
try { |
842 |
t.start(); |
843 |
Thread.sleep(SHORT_DELAY_MS); |
844 |
t.interrupt(); |
845 |
t.join(SHORT_DELAY_MS); |
846 |
assertFalse(t.isAlive()); |
847 |
} |
848 |
catch (Exception ex) { |
849 |
unexpectedException(); |
850 |
} |
851 |
} |
852 |
|
853 |
/** |
854 |
* awaitNanos is interruptible |
855 |
*/ |
856 |
public void testAwaitNanos_Interrupt() { |
857 |
final ReentrantLock lock = new ReentrantLock(); |
858 |
final Condition c = lock.newCondition(); |
859 |
Thread t = new Thread(new Runnable() { |
860 |
public void run() { |
861 |
try { |
862 |
lock.lock(); |
863 |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
864 |
lock.unlock(); |
865 |
threadShouldThrow(); |
866 |
} |
867 |
catch(InterruptedException success) { |
868 |
} |
869 |
} |
870 |
}); |
871 |
|
872 |
try { |
873 |
t.start(); |
874 |
Thread.sleep(SHORT_DELAY_MS); |
875 |
t.interrupt(); |
876 |
t.join(SHORT_DELAY_MS); |
877 |
assertFalse(t.isAlive()); |
878 |
} |
879 |
catch (Exception ex) { |
880 |
unexpectedException(); |
881 |
} |
882 |
} |
883 |
|
884 |
/** |
885 |
* awaitUntil is interruptible |
886 |
*/ |
887 |
public void testAwaitUntil_Interrupt() { |
888 |
final ReentrantLock lock = new ReentrantLock(); |
889 |
final Condition c = lock.newCondition(); |
890 |
Thread t = new Thread(new Runnable() { |
891 |
public void run() { |
892 |
try { |
893 |
lock.lock(); |
894 |
java.util.Date d = new java.util.Date(); |
895 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
896 |
lock.unlock(); |
897 |
threadShouldThrow(); |
898 |
} |
899 |
catch(InterruptedException success) { |
900 |
} |
901 |
} |
902 |
}); |
903 |
|
904 |
try { |
905 |
t.start(); |
906 |
Thread.sleep(SHORT_DELAY_MS); |
907 |
t.interrupt(); |
908 |
t.join(SHORT_DELAY_MS); |
909 |
assertFalse(t.isAlive()); |
910 |
} |
911 |
catch (Exception ex) { |
912 |
unexpectedException(); |
913 |
} |
914 |
} |
915 |
|
916 |
/** |
917 |
* signalAll wakes up all threads |
918 |
*/ |
919 |
public void testSignalAll() { |
920 |
final ReentrantLock lock = new ReentrantLock(); |
921 |
final Condition c = lock.newCondition(); |
922 |
Thread t1 = new Thread(new Runnable() { |
923 |
public void run() { |
924 |
try { |
925 |
lock.lock(); |
926 |
c.await(); |
927 |
lock.unlock(); |
928 |
} |
929 |
catch(InterruptedException e) { |
930 |
threadUnexpectedException(); |
931 |
} |
932 |
} |
933 |
}); |
934 |
|
935 |
Thread t2 = new Thread(new Runnable() { |
936 |
public void run() { |
937 |
try { |
938 |
lock.lock(); |
939 |
c.await(); |
940 |
lock.unlock(); |
941 |
} |
942 |
catch(InterruptedException e) { |
943 |
threadUnexpectedException(); |
944 |
} |
945 |
} |
946 |
}); |
947 |
|
948 |
try { |
949 |
t1.start(); |
950 |
t2.start(); |
951 |
Thread.sleep(SHORT_DELAY_MS); |
952 |
lock.lock(); |
953 |
c.signalAll(); |
954 |
lock.unlock(); |
955 |
t1.join(SHORT_DELAY_MS); |
956 |
t2.join(SHORT_DELAY_MS); |
957 |
assertFalse(t1.isAlive()); |
958 |
assertFalse(t2.isAlive()); |
959 |
} |
960 |
catch (Exception ex) { |
961 |
unexpectedException(); |
962 |
} |
963 |
} |
964 |
|
965 |
/** |
966 |
* A serialized lock deserializes as unlocked |
967 |
*/ |
968 |
public void testSerialization() { |
969 |
ReentrantLock l = new ReentrantLock(); |
970 |
l.lock(); |
971 |
l.unlock(); |
972 |
|
973 |
try { |
974 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
975 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
976 |
out.writeObject(l); |
977 |
out.close(); |
978 |
|
979 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
980 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
981 |
ReentrantLock r = (ReentrantLock) in.readObject(); |
982 |
r.lock(); |
983 |
r.unlock(); |
984 |
} catch(Exception e){ |
985 |
e.printStackTrace(); |
986 |
unexpectedException(); |
987 |
} |
988 |
} |
989 |
|
990 |
} |