1 |
/* |
2 |
* Written by members of JCP JSR-166 Expert Group and released to the |
3 |
* public domain. Use, modify, and redistribute this code in any way |
4 |
* without acknowledgement. Other contributors include Andrew Wright, |
5 |
* Jeffrey Hayes, Pat Fischer, Mike Judd. |
6 |
*/ |
7 |
|
8 |
import junit.framework.*; |
9 |
import java.util.concurrent.locks.*; |
10 |
import java.util.concurrent.*; |
11 |
import java.io.*; |
12 |
import java.util.*; |
13 |
|
14 |
public class ReentrantReadWriteLockTest extends JSR166TestCase { |
15 |
public static void main(String[] args) { |
16 |
junit.textui.TestRunner.run (suite()); |
17 |
} |
18 |
public static Test suite() { |
19 |
return new TestSuite(ReentrantReadWriteLockTest.class); |
20 |
} |
21 |
|
22 |
/** |
23 |
* A runnable calling lockInterruptibly |
24 |
*/ |
25 |
class InterruptibleLockRunnable implements Runnable { |
26 |
final ReentrantReadWriteLock lock; |
27 |
InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
28 |
public void run() { |
29 |
try { |
30 |
lock.writeLock().lockInterruptibly(); |
31 |
} catch(InterruptedException success){} |
32 |
} |
33 |
} |
34 |
|
35 |
|
36 |
/** |
37 |
* A runnable calling lockInterruptibly that expects to be |
38 |
* interrupted |
39 |
*/ |
40 |
class InterruptedLockRunnable implements Runnable { |
41 |
final ReentrantReadWriteLock lock; |
42 |
InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
43 |
public void run() { |
44 |
try { |
45 |
lock.writeLock().lockInterruptibly(); |
46 |
threadShouldThrow(); |
47 |
} catch(InterruptedException success){} |
48 |
} |
49 |
} |
50 |
|
51 |
/** |
52 |
* Subclass to expose protected methods |
53 |
*/ |
54 |
static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock { |
55 |
PublicReentrantReadWriteLock() { super(); } |
56 |
public Collection<Thread> getQueuedThreads() { |
57 |
return super.getQueuedThreads(); |
58 |
} |
59 |
public PublicCondition newCondition() { |
60 |
return new PublicCondition(this); |
61 |
} |
62 |
|
63 |
static class PublicCondition extends AbstractReentrantLock.ConditionObject { |
64 |
PublicCondition(PublicReentrantReadWriteLock l) { super(l); } |
65 |
public Collection<Thread> getWaitingThreads() { |
66 |
return super.getWaitingThreads(); |
67 |
} |
68 |
} |
69 |
|
70 |
} |
71 |
|
72 |
/** |
73 |
* Constructor sets given fairness, and is in unlocked state |
74 |
*/ |
75 |
public void testConstructor() { |
76 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
77 |
assertFalse(rl.isFair()); |
78 |
assertFalse(rl.isWriteLocked()); |
79 |
assertEquals(0, rl.getReadLocks()); |
80 |
ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true); |
81 |
assertTrue(r2.isFair()); |
82 |
assertFalse(r2.isWriteLocked()); |
83 |
assertEquals(0, r2.getReadLocks()); |
84 |
} |
85 |
|
86 |
/** |
87 |
* write-locking and read-locking an unlocked lock succeed |
88 |
*/ |
89 |
public void testLock() { |
90 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
91 |
rl.writeLock().lock(); |
92 |
assertTrue(rl.isWriteLocked()); |
93 |
assertTrue(rl.isWriteLockedByCurrentThread()); |
94 |
assertEquals(0, rl.getReadLocks()); |
95 |
rl.writeLock().unlock(); |
96 |
assertFalse(rl.isWriteLocked()); |
97 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
98 |
assertEquals(0, rl.getReadLocks()); |
99 |
rl.readLock().lock(); |
100 |
assertFalse(rl.isWriteLocked()); |
101 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
102 |
assertEquals(1, rl.getReadLocks()); |
103 |
rl.readLock().unlock(); |
104 |
assertFalse(rl.isWriteLocked()); |
105 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
106 |
assertEquals(0, rl.getReadLocks()); |
107 |
} |
108 |
|
109 |
|
110 |
/** |
111 |
* locking an unlocked fair lock succeeds |
112 |
*/ |
113 |
public void testFairLock() { |
114 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true); |
115 |
rl.writeLock().lock(); |
116 |
assertTrue(rl.isWriteLocked()); |
117 |
assertTrue(rl.isWriteLockedByCurrentThread()); |
118 |
assertEquals(0, rl.getReadLocks()); |
119 |
rl.writeLock().unlock(); |
120 |
assertFalse(rl.isWriteLocked()); |
121 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
122 |
assertEquals(0, rl.getReadLocks()); |
123 |
rl.readLock().lock(); |
124 |
assertFalse(rl.isWriteLocked()); |
125 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
126 |
assertEquals(1, rl.getReadLocks()); |
127 |
rl.readLock().unlock(); |
128 |
assertFalse(rl.isWriteLocked()); |
129 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
130 |
assertEquals(0, rl.getReadLocks()); |
131 |
} |
132 |
|
133 |
/** |
134 |
* getWriteHoldCount returns number of recursive holds |
135 |
*/ |
136 |
public void testGetHoldCount() { |
137 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
138 |
for(int i = 1; i <= SIZE; i++) { |
139 |
lock.writeLock().lock(); |
140 |
assertEquals(i,lock.getWriteHoldCount()); |
141 |
} |
142 |
for(int i = SIZE; i > 0; i--) { |
143 |
lock.writeLock().unlock(); |
144 |
assertEquals(i-1,lock.getWriteHoldCount()); |
145 |
} |
146 |
} |
147 |
|
148 |
|
149 |
/** |
150 |
* write-unlocking an unlocked lock throws IllegalMonitorStateException |
151 |
*/ |
152 |
public void testUnlock_IllegalMonitorStateException() { |
153 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
154 |
try { |
155 |
rl.writeLock().unlock(); |
156 |
shouldThrow(); |
157 |
} catch(IllegalMonitorStateException success){} |
158 |
} |
159 |
|
160 |
|
161 |
/** |
162 |
* write-lockInterruptibly is interruptible |
163 |
*/ |
164 |
public void testWriteLockInterruptibly_Interrupted() { |
165 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
166 |
lock.writeLock().lock(); |
167 |
Thread t = new Thread(new Runnable() { |
168 |
public void run() { |
169 |
try { |
170 |
lock.writeLock().lockInterruptibly(); |
171 |
threadShouldThrow(); |
172 |
} catch(InterruptedException success){} |
173 |
} |
174 |
}); |
175 |
try { |
176 |
t.start(); |
177 |
t.interrupt(); |
178 |
lock.writeLock().unlock(); |
179 |
t.join(); |
180 |
} catch(Exception e){ |
181 |
unexpectedException(); |
182 |
} |
183 |
} |
184 |
|
185 |
/** |
186 |
* timed write-trylock is interruptible |
187 |
*/ |
188 |
public void testWriteTryLock_Interrupted() { |
189 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
190 |
lock.writeLock().lock(); |
191 |
Thread t = new Thread(new Runnable() { |
192 |
public void run() { |
193 |
try { |
194 |
lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
195 |
threadShouldThrow(); |
196 |
} catch(InterruptedException success){} |
197 |
} |
198 |
}); |
199 |
try { |
200 |
t.start(); |
201 |
t.interrupt(); |
202 |
lock.writeLock().unlock(); |
203 |
t.join(); |
204 |
} catch(Exception e){ |
205 |
unexpectedException(); |
206 |
} |
207 |
} |
208 |
|
209 |
/** |
210 |
* read-lockInterruptibly is interruptible |
211 |
*/ |
212 |
public void testReadLockInterruptibly_Interrupted() { |
213 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
214 |
lock.writeLock().lock(); |
215 |
Thread t = new Thread(new Runnable() { |
216 |
public void run() { |
217 |
try { |
218 |
lock.readLock().lockInterruptibly(); |
219 |
threadShouldThrow(); |
220 |
} catch(InterruptedException success){} |
221 |
} |
222 |
}); |
223 |
try { |
224 |
t.start(); |
225 |
t.interrupt(); |
226 |
lock.writeLock().unlock(); |
227 |
t.join(); |
228 |
} catch(Exception e){ |
229 |
unexpectedException(); |
230 |
} |
231 |
} |
232 |
|
233 |
/** |
234 |
* timed read-trylock is interruptible |
235 |
*/ |
236 |
public void testReadTryLock_Interrupted() { |
237 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
238 |
lock.writeLock().lock(); |
239 |
Thread t = new Thread(new Runnable() { |
240 |
public void run() { |
241 |
try { |
242 |
lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS); |
243 |
threadShouldThrow(); |
244 |
} catch(InterruptedException success){} |
245 |
} |
246 |
}); |
247 |
try { |
248 |
t.start(); |
249 |
t.interrupt(); |
250 |
t.join(); |
251 |
} catch(Exception e){ |
252 |
unexpectedException(); |
253 |
} |
254 |
} |
255 |
|
256 |
|
257 |
/** |
258 |
* write-trylock fails if locked |
259 |
*/ |
260 |
public void testWriteTryLockWhenLocked() { |
261 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
262 |
lock.writeLock().lock(); |
263 |
Thread t = new Thread(new Runnable() { |
264 |
public void run() { |
265 |
threadAssertFalse(lock.writeLock().tryLock()); |
266 |
} |
267 |
}); |
268 |
try { |
269 |
t.start(); |
270 |
t.join(); |
271 |
lock.writeLock().unlock(); |
272 |
} catch(Exception e){ |
273 |
unexpectedException(); |
274 |
} |
275 |
} |
276 |
|
277 |
/** |
278 |
* read-trylock fails if locked |
279 |
*/ |
280 |
public void testReadTryLockWhenLocked() { |
281 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
282 |
lock.writeLock().lock(); |
283 |
Thread t = new Thread(new Runnable() { |
284 |
public void run() { |
285 |
threadAssertFalse(lock.readLock().tryLock()); |
286 |
} |
287 |
}); |
288 |
try { |
289 |
t.start(); |
290 |
t.join(); |
291 |
lock.writeLock().unlock(); |
292 |
} catch(Exception e){ |
293 |
unexpectedException(); |
294 |
} |
295 |
} |
296 |
|
297 |
/** |
298 |
* Multiple threads can hold a read lock when not write-locked |
299 |
*/ |
300 |
public void testMultipleReadLocks() { |
301 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
302 |
lock.readLock().lock(); |
303 |
Thread t = new Thread(new Runnable() { |
304 |
public void run() { |
305 |
threadAssertTrue(lock.readLock().tryLock()); |
306 |
lock.readLock().unlock(); |
307 |
} |
308 |
}); |
309 |
try { |
310 |
t.start(); |
311 |
t.join(); |
312 |
lock.readLock().unlock(); |
313 |
} catch(Exception e){ |
314 |
unexpectedException(); |
315 |
} |
316 |
} |
317 |
|
318 |
/** |
319 |
* A writelock succeeds after reading threads unlock |
320 |
*/ |
321 |
public void testWriteAfterMultipleReadLocks() { |
322 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
323 |
lock.readLock().lock(); |
324 |
Thread t1 = new Thread(new Runnable() { |
325 |
public void run() { |
326 |
lock.readLock().lock(); |
327 |
lock.readLock().unlock(); |
328 |
} |
329 |
}); |
330 |
Thread t2 = new Thread(new Runnable() { |
331 |
public void run() { |
332 |
lock.writeLock().lock(); |
333 |
lock.writeLock().unlock(); |
334 |
} |
335 |
}); |
336 |
|
337 |
try { |
338 |
t1.start(); |
339 |
t2.start(); |
340 |
Thread.sleep(SHORT_DELAY_MS); |
341 |
lock.readLock().unlock(); |
342 |
t1.join(MEDIUM_DELAY_MS); |
343 |
t2.join(MEDIUM_DELAY_MS); |
344 |
assertTrue(!t1.isAlive()); |
345 |
assertTrue(!t2.isAlive()); |
346 |
|
347 |
} catch(Exception e){ |
348 |
unexpectedException(); |
349 |
} |
350 |
} |
351 |
|
352 |
/** |
353 |
* Readlocks succeed after a writing thread unlocks |
354 |
*/ |
355 |
public void testReadAfterWriteLock() { |
356 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
357 |
lock.writeLock().lock(); |
358 |
Thread t1 = new Thread(new Runnable() { |
359 |
public void run() { |
360 |
lock.readLock().lock(); |
361 |
lock.readLock().unlock(); |
362 |
} |
363 |
}); |
364 |
Thread t2 = new Thread(new Runnable() { |
365 |
public void run() { |
366 |
lock.readLock().lock(); |
367 |
lock.readLock().unlock(); |
368 |
} |
369 |
}); |
370 |
|
371 |
try { |
372 |
t1.start(); |
373 |
t2.start(); |
374 |
Thread.sleep(SHORT_DELAY_MS); |
375 |
lock.writeLock().unlock(); |
376 |
t1.join(MEDIUM_DELAY_MS); |
377 |
t2.join(MEDIUM_DELAY_MS); |
378 |
assertTrue(!t1.isAlive()); |
379 |
assertTrue(!t2.isAlive()); |
380 |
|
381 |
} catch(Exception e){ |
382 |
unexpectedException(); |
383 |
} |
384 |
} |
385 |
|
386 |
|
387 |
/** |
388 |
* Read trylock succeeds if readlocked but not writelocked |
389 |
*/ |
390 |
public void testTryLockWhenReadLocked() { |
391 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
392 |
lock.readLock().lock(); |
393 |
Thread t = new Thread(new Runnable() { |
394 |
public void run() { |
395 |
threadAssertTrue(lock.readLock().tryLock()); |
396 |
lock.readLock().unlock(); |
397 |
} |
398 |
}); |
399 |
try { |
400 |
t.start(); |
401 |
t.join(); |
402 |
lock.readLock().unlock(); |
403 |
} catch(Exception e){ |
404 |
unexpectedException(); |
405 |
} |
406 |
} |
407 |
|
408 |
|
409 |
|
410 |
/** |
411 |
* write trylock fails when readlocked |
412 |
*/ |
413 |
public void testWriteTryLockWhenReadLocked() { |
414 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
415 |
lock.readLock().lock(); |
416 |
Thread t = new Thread(new Runnable() { |
417 |
public void run() { |
418 |
threadAssertFalse(lock.writeLock().tryLock()); |
419 |
} |
420 |
}); |
421 |
try { |
422 |
t.start(); |
423 |
t.join(); |
424 |
lock.readLock().unlock(); |
425 |
} catch(Exception e){ |
426 |
unexpectedException(); |
427 |
} |
428 |
} |
429 |
|
430 |
|
431 |
|
432 |
/** |
433 |
* write timed trylock times out if locked |
434 |
*/ |
435 |
public void testWriteTryLock_Timeout() { |
436 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
437 |
lock.writeLock().lock(); |
438 |
Thread t = new Thread(new Runnable() { |
439 |
public void run() { |
440 |
try { |
441 |
threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS)); |
442 |
} catch (Exception ex) { |
443 |
threadUnexpectedException(); |
444 |
} |
445 |
} |
446 |
}); |
447 |
try { |
448 |
t.start(); |
449 |
t.join(); |
450 |
lock.writeLock().unlock(); |
451 |
} catch(Exception e){ |
452 |
unexpectedException(); |
453 |
} |
454 |
} |
455 |
|
456 |
/** |
457 |
* read timed trylock times out if write-locked |
458 |
*/ |
459 |
public void testReadTryLock_Timeout() { |
460 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
461 |
lock.writeLock().lock(); |
462 |
Thread t = new Thread(new Runnable() { |
463 |
public void run() { |
464 |
try { |
465 |
threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS)); |
466 |
} catch (Exception ex) { |
467 |
threadUnexpectedException(); |
468 |
} |
469 |
} |
470 |
}); |
471 |
try { |
472 |
t.start(); |
473 |
t.join(); |
474 |
lock.writeLock().unlock(); |
475 |
} catch(Exception e){ |
476 |
unexpectedException(); |
477 |
} |
478 |
} |
479 |
|
480 |
|
481 |
/** |
482 |
* write lockInterruptibly succeeds if lock free else is interruptible |
483 |
*/ |
484 |
public void testWriteLockInterruptibly() { |
485 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
486 |
try { |
487 |
lock.writeLock().lockInterruptibly(); |
488 |
} catch(Exception e) { |
489 |
unexpectedException(); |
490 |
} |
491 |
Thread t = new Thread(new Runnable() { |
492 |
public void run() { |
493 |
try { |
494 |
lock.writeLock().lockInterruptibly(); |
495 |
threadShouldThrow(); |
496 |
} |
497 |
catch(InterruptedException success) { |
498 |
} |
499 |
} |
500 |
}); |
501 |
try { |
502 |
t.start(); |
503 |
t.interrupt(); |
504 |
t.join(); |
505 |
lock.writeLock().unlock(); |
506 |
} catch(Exception e){ |
507 |
unexpectedException(); |
508 |
} |
509 |
} |
510 |
|
511 |
/** |
512 |
* read lockInterruptibly succeeds if lock free else is interruptible |
513 |
*/ |
514 |
public void testReadLockInterruptibly() { |
515 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
516 |
try { |
517 |
lock.writeLock().lockInterruptibly(); |
518 |
} catch(Exception e) { |
519 |
unexpectedException(); |
520 |
} |
521 |
Thread t = new Thread(new Runnable() { |
522 |
public void run() { |
523 |
try { |
524 |
lock.readLock().lockInterruptibly(); |
525 |
threadShouldThrow(); |
526 |
} |
527 |
catch(InterruptedException success) { |
528 |
} |
529 |
} |
530 |
}); |
531 |
try { |
532 |
t.start(); |
533 |
t.interrupt(); |
534 |
t.join(); |
535 |
lock.writeLock().unlock(); |
536 |
} catch(Exception e){ |
537 |
unexpectedException(); |
538 |
} |
539 |
} |
540 |
|
541 |
/** |
542 |
* Calling await without holding lock throws IllegalMonitorStateException |
543 |
*/ |
544 |
public void testAwait_IllegalMonitor() { |
545 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
546 |
final Condition c = lock.writeLock().newCondition(); |
547 |
try { |
548 |
c.await(); |
549 |
shouldThrow(); |
550 |
} |
551 |
catch (IllegalMonitorStateException success) { |
552 |
} |
553 |
catch (Exception ex) { |
554 |
shouldThrow(); |
555 |
} |
556 |
} |
557 |
|
558 |
/** |
559 |
* Calling signal without holding lock throws IllegalMonitorStateException |
560 |
*/ |
561 |
public void testSignal_IllegalMonitor() { |
562 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
563 |
final Condition c = lock.writeLock().newCondition(); |
564 |
try { |
565 |
c.signal(); |
566 |
shouldThrow(); |
567 |
} |
568 |
catch (IllegalMonitorStateException success) { |
569 |
} |
570 |
catch (Exception ex) { |
571 |
unexpectedException(); |
572 |
} |
573 |
} |
574 |
|
575 |
/** |
576 |
* awaitNanos without a signal times out |
577 |
*/ |
578 |
public void testAwaitNanos_Timeout() { |
579 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
580 |
final Condition c = lock.writeLock().newCondition(); |
581 |
try { |
582 |
lock.writeLock().lock(); |
583 |
long t = c.awaitNanos(100); |
584 |
assertTrue(t <= 0); |
585 |
lock.writeLock().unlock(); |
586 |
} |
587 |
catch (Exception ex) { |
588 |
unexpectedException(); |
589 |
} |
590 |
} |
591 |
|
592 |
|
593 |
/** |
594 |
* timed await without a signal times out |
595 |
*/ |
596 |
public void testAwait_Timeout() { |
597 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
598 |
final Condition c = lock.writeLock().newCondition(); |
599 |
try { |
600 |
lock.writeLock().lock(); |
601 |
assertFalse(c.await(10, TimeUnit.MILLISECONDS)); |
602 |
lock.writeLock().unlock(); |
603 |
} |
604 |
catch (Exception ex) { |
605 |
unexpectedException(); |
606 |
} |
607 |
} |
608 |
|
609 |
/** |
610 |
* awaitUntil without a signal times out |
611 |
*/ |
612 |
public void testAwaitUntil_Timeout() { |
613 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
614 |
final Condition c = lock.writeLock().newCondition(); |
615 |
try { |
616 |
lock.writeLock().lock(); |
617 |
java.util.Date d = new java.util.Date(); |
618 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
619 |
lock.writeLock().unlock(); |
620 |
} |
621 |
catch (Exception ex) { |
622 |
unexpectedException(); |
623 |
} |
624 |
} |
625 |
|
626 |
/** |
627 |
* await returns when signalled |
628 |
*/ |
629 |
public void testAwait() { |
630 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
631 |
final Condition c = lock.writeLock().newCondition(); |
632 |
Thread t = new Thread(new Runnable() { |
633 |
public void run() { |
634 |
try { |
635 |
lock.writeLock().lock(); |
636 |
c.await(); |
637 |
lock.writeLock().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.writeLock().lock(); |
649 |
c.signal(); |
650 |
lock.writeLock().unlock(); |
651 |
t.join(SHORT_DELAY_MS); |
652 |
assertFalse(t.isAlive()); |
653 |
} |
654 |
catch (Exception ex) { |
655 |
unexpectedException(); |
656 |
} |
657 |
} |
658 |
|
659 |
/** |
660 |
* awaitUninterruptibly doesn't abort on interrupt |
661 |
*/ |
662 |
public void testAwaitUninterruptibly() { |
663 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
664 |
final Condition c = lock.writeLock().newCondition(); |
665 |
Thread t = new Thread(new Runnable() { |
666 |
public void run() { |
667 |
lock.writeLock().lock(); |
668 |
c.awaitUninterruptibly(); |
669 |
lock.writeLock().unlock(); |
670 |
} |
671 |
}); |
672 |
|
673 |
try { |
674 |
t.start(); |
675 |
Thread.sleep(SHORT_DELAY_MS); |
676 |
t.interrupt(); |
677 |
lock.writeLock().lock(); |
678 |
c.signal(); |
679 |
lock.writeLock().unlock(); |
680 |
assert(t.isInterrupted()); |
681 |
t.join(SHORT_DELAY_MS); |
682 |
assertFalse(t.isAlive()); |
683 |
} |
684 |
catch (Exception ex) { |
685 |
unexpectedException(); |
686 |
} |
687 |
} |
688 |
|
689 |
/** |
690 |
* await is interruptible |
691 |
*/ |
692 |
public void testAwait_Interrupt() { |
693 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
694 |
final Condition c = lock.writeLock().newCondition(); |
695 |
Thread t = new Thread(new Runnable() { |
696 |
public void run() { |
697 |
try { |
698 |
lock.writeLock().lock(); |
699 |
c.await(); |
700 |
lock.writeLock().unlock(); |
701 |
threadShouldThrow(); |
702 |
} |
703 |
catch(InterruptedException success) { |
704 |
} |
705 |
} |
706 |
}); |
707 |
|
708 |
try { |
709 |
t.start(); |
710 |
Thread.sleep(SHORT_DELAY_MS); |
711 |
t.interrupt(); |
712 |
t.join(SHORT_DELAY_MS); |
713 |
assertFalse(t.isAlive()); |
714 |
} |
715 |
catch (Exception ex) { |
716 |
unexpectedException(); |
717 |
} |
718 |
} |
719 |
|
720 |
/** |
721 |
* awaitNanos is interruptible |
722 |
*/ |
723 |
public void testAwaitNanos_Interrupt() { |
724 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
725 |
final Condition c = lock.writeLock().newCondition(); |
726 |
Thread t = new Thread(new Runnable() { |
727 |
public void run() { |
728 |
try { |
729 |
lock.writeLock().lock(); |
730 |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
731 |
lock.writeLock().unlock(); |
732 |
threadShouldThrow(); |
733 |
} |
734 |
catch(InterruptedException success) { |
735 |
} |
736 |
} |
737 |
}); |
738 |
|
739 |
try { |
740 |
t.start(); |
741 |
Thread.sleep(SHORT_DELAY_MS); |
742 |
t.interrupt(); |
743 |
t.join(SHORT_DELAY_MS); |
744 |
assertFalse(t.isAlive()); |
745 |
} |
746 |
catch (Exception ex) { |
747 |
unexpectedException(); |
748 |
} |
749 |
} |
750 |
|
751 |
/** |
752 |
* awaitUntil is interruptible |
753 |
*/ |
754 |
public void testAwaitUntil_Interrupt() { |
755 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
756 |
final Condition c = lock.writeLock().newCondition(); |
757 |
Thread t = new Thread(new Runnable() { |
758 |
public void run() { |
759 |
try { |
760 |
lock.writeLock().lock(); |
761 |
java.util.Date d = new java.util.Date(); |
762 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
763 |
lock.writeLock().unlock(); |
764 |
threadShouldThrow(); |
765 |
} |
766 |
catch(InterruptedException success) { |
767 |
} |
768 |
} |
769 |
}); |
770 |
|
771 |
try { |
772 |
t.start(); |
773 |
Thread.sleep(SHORT_DELAY_MS); |
774 |
t.interrupt(); |
775 |
t.join(SHORT_DELAY_MS); |
776 |
assertFalse(t.isAlive()); |
777 |
} |
778 |
catch (Exception ex) { |
779 |
unexpectedException(); |
780 |
} |
781 |
} |
782 |
|
783 |
/** |
784 |
* signalAll wakes up all threads |
785 |
*/ |
786 |
public void testSignalAll() { |
787 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
788 |
final Condition c = lock.writeLock().newCondition(); |
789 |
Thread t1 = new Thread(new Runnable() { |
790 |
public void run() { |
791 |
try { |
792 |
lock.writeLock().lock(); |
793 |
c.await(); |
794 |
lock.writeLock().unlock(); |
795 |
} |
796 |
catch(InterruptedException e) { |
797 |
threadUnexpectedException(); |
798 |
} |
799 |
} |
800 |
}); |
801 |
|
802 |
Thread t2 = new Thread(new Runnable() { |
803 |
public void run() { |
804 |
try { |
805 |
lock.writeLock().lock(); |
806 |
c.await(); |
807 |
lock.writeLock().unlock(); |
808 |
} |
809 |
catch(InterruptedException e) { |
810 |
threadUnexpectedException(); |
811 |
} |
812 |
} |
813 |
}); |
814 |
|
815 |
try { |
816 |
t1.start(); |
817 |
t2.start(); |
818 |
Thread.sleep(SHORT_DELAY_MS); |
819 |
lock.writeLock().lock(); |
820 |
c.signalAll(); |
821 |
lock.writeLock().unlock(); |
822 |
t1.join(SHORT_DELAY_MS); |
823 |
t2.join(SHORT_DELAY_MS); |
824 |
assertFalse(t1.isAlive()); |
825 |
assertFalse(t2.isAlive()); |
826 |
} |
827 |
catch (Exception ex) { |
828 |
unexpectedException(); |
829 |
} |
830 |
} |
831 |
|
832 |
/** |
833 |
* A serialized lock deserializes as unlocked |
834 |
*/ |
835 |
public void testSerialization() { |
836 |
ReentrantReadWriteLock l = new ReentrantReadWriteLock(); |
837 |
l.readLock().lock(); |
838 |
l.readLock().unlock(); |
839 |
|
840 |
try { |
841 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
842 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
843 |
out.writeObject(l); |
844 |
out.close(); |
845 |
|
846 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
847 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
848 |
ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject(); |
849 |
r.readLock().lock(); |
850 |
r.readLock().unlock(); |
851 |
} catch(Exception e){ |
852 |
e.printStackTrace(); |
853 |
unexpectedException(); |
854 |
} |
855 |
} |
856 |
|
857 |
/** |
858 |
* getQueueLength reports number of waiting threads |
859 |
*/ |
860 |
public void testGetQueueLength() { |
861 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
862 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
863 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
864 |
try { |
865 |
assertEquals(0, lock.getQueueLength()); |
866 |
lock.writeLock().lock(); |
867 |
t1.start(); |
868 |
Thread.sleep(SHORT_DELAY_MS); |
869 |
assertEquals(1, lock.getQueueLength()); |
870 |
t2.start(); |
871 |
Thread.sleep(SHORT_DELAY_MS); |
872 |
assertEquals(2, lock.getQueueLength()); |
873 |
t1.interrupt(); |
874 |
Thread.sleep(SHORT_DELAY_MS); |
875 |
assertEquals(1, lock.getQueueLength()); |
876 |
lock.writeLock().unlock(); |
877 |
Thread.sleep(SHORT_DELAY_MS); |
878 |
assertEquals(0, lock.getQueueLength()); |
879 |
t1.join(); |
880 |
t2.join(); |
881 |
} catch(Exception e){ |
882 |
unexpectedException(); |
883 |
} |
884 |
} |
885 |
|
886 |
/** |
887 |
* getQueuedThreads includes waiting threads |
888 |
*/ |
889 |
public void testGetQueuedThreads() { |
890 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
891 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
892 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
893 |
try { |
894 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
895 |
lock.writeLock().lock(); |
896 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
897 |
t1.start(); |
898 |
Thread.sleep(SHORT_DELAY_MS); |
899 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
900 |
t2.start(); |
901 |
Thread.sleep(SHORT_DELAY_MS); |
902 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
903 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
904 |
t1.interrupt(); |
905 |
Thread.sleep(SHORT_DELAY_MS); |
906 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
907 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
908 |
lock.writeLock().unlock(); |
909 |
Thread.sleep(SHORT_DELAY_MS); |
910 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
911 |
t1.join(); |
912 |
t2.join(); |
913 |
} catch(Exception e){ |
914 |
unexpectedException(); |
915 |
} |
916 |
} |
917 |
|
918 |
/** |
919 |
* hasWaiters returns true when a thread is waiting, else false |
920 |
*/ |
921 |
public void testHasWaiters() { |
922 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
923 |
final AbstractReentrantLock.ConditionObject c = (AbstractReentrantLock.ConditionObject)(lock.writeLock().newCondition()); |
924 |
Thread t = new Thread(new Runnable() { |
925 |
public void run() { |
926 |
try { |
927 |
lock.writeLock().lock(); |
928 |
threadAssertFalse(c.hasWaiters()); |
929 |
threadAssertEquals(0, c.getWaitQueueLength()); |
930 |
c.await(); |
931 |
lock.writeLock().unlock(); |
932 |
} |
933 |
catch(InterruptedException e) { |
934 |
threadUnexpectedException(); |
935 |
} |
936 |
} |
937 |
}); |
938 |
|
939 |
try { |
940 |
t.start(); |
941 |
Thread.sleep(SHORT_DELAY_MS); |
942 |
lock.writeLock().lock(); |
943 |
assertTrue(c.hasWaiters()); |
944 |
assertEquals(1, c.getWaitQueueLength()); |
945 |
c.signal(); |
946 |
lock.writeLock().unlock(); |
947 |
Thread.sleep(SHORT_DELAY_MS); |
948 |
lock.writeLock().lock(); |
949 |
assertFalse(c.hasWaiters()); |
950 |
assertEquals(0, c.getWaitQueueLength()); |
951 |
lock.writeLock().unlock(); |
952 |
t.join(SHORT_DELAY_MS); |
953 |
assertFalse(t.isAlive()); |
954 |
} |
955 |
catch (Exception ex) { |
956 |
unexpectedException(); |
957 |
} |
958 |
} |
959 |
|
960 |
/** |
961 |
* getWaitQueueLength returns number of waiting threads |
962 |
*/ |
963 |
public void testGetWaitQueueLength() { |
964 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
965 |
final AbstractReentrantLock.ConditionObject c = (AbstractReentrantLock.ConditionObject)(lock.writeLock().newCondition()); |
966 |
Thread t1 = new Thread(new Runnable() { |
967 |
public void run() { |
968 |
try { |
969 |
lock.writeLock().lock(); |
970 |
threadAssertFalse(c.hasWaiters()); |
971 |
threadAssertEquals(0, c.getWaitQueueLength()); |
972 |
c.await(); |
973 |
lock.writeLock().unlock(); |
974 |
} |
975 |
catch(InterruptedException e) { |
976 |
threadUnexpectedException(); |
977 |
} |
978 |
} |
979 |
}); |
980 |
|
981 |
Thread t2 = new Thread(new Runnable() { |
982 |
public void run() { |
983 |
try { |
984 |
lock.writeLock().lock(); |
985 |
threadAssertTrue(c.hasWaiters()); |
986 |
threadAssertEquals(1, c.getWaitQueueLength()); |
987 |
c.await(); |
988 |
lock.writeLock().unlock(); |
989 |
} |
990 |
catch(InterruptedException e) { |
991 |
threadUnexpectedException(); |
992 |
} |
993 |
} |
994 |
}); |
995 |
|
996 |
try { |
997 |
t1.start(); |
998 |
Thread.sleep(SHORT_DELAY_MS); |
999 |
t2.start(); |
1000 |
Thread.sleep(SHORT_DELAY_MS); |
1001 |
lock.writeLock().lock(); |
1002 |
assertTrue(c.hasWaiters()); |
1003 |
assertEquals(2, c.getWaitQueueLength()); |
1004 |
c.signalAll(); |
1005 |
lock.writeLock().unlock(); |
1006 |
Thread.sleep(SHORT_DELAY_MS); |
1007 |
lock.writeLock().lock(); |
1008 |
assertFalse(c.hasWaiters()); |
1009 |
assertEquals(0, c.getWaitQueueLength()); |
1010 |
lock.writeLock().unlock(); |
1011 |
t1.join(SHORT_DELAY_MS); |
1012 |
t2.join(SHORT_DELAY_MS); |
1013 |
assertFalse(t1.isAlive()); |
1014 |
assertFalse(t2.isAlive()); |
1015 |
} |
1016 |
catch (Exception ex) { |
1017 |
unexpectedException(); |
1018 |
} |
1019 |
} |
1020 |
|
1021 |
/** |
1022 |
* getWaitingThreads returns only and all waiting threads |
1023 |
*/ |
1024 |
public void testGetWaitingThreads() { |
1025 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1026 |
final PublicReentrantReadWriteLock.PublicCondition c = (PublicReentrantReadWriteLock.PublicCondition)lock.newCondition(); |
1027 |
Thread t1 = new Thread(new Runnable() { |
1028 |
public void run() { |
1029 |
try { |
1030 |
lock.writeLock().lock(); |
1031 |
threadAssertTrue(c.getWaitingThreads().isEmpty()); |
1032 |
c.await(); |
1033 |
lock.writeLock().unlock(); |
1034 |
} |
1035 |
catch(InterruptedException e) { |
1036 |
threadUnexpectedException(); |
1037 |
} |
1038 |
} |
1039 |
}); |
1040 |
|
1041 |
Thread t2 = new Thread(new Runnable() { |
1042 |
public void run() { |
1043 |
try { |
1044 |
lock.writeLock().lock(); |
1045 |
threadAssertFalse(c.getWaitingThreads().isEmpty()); |
1046 |
c.await(); |
1047 |
lock.writeLock().unlock(); |
1048 |
} |
1049 |
catch(InterruptedException e) { |
1050 |
threadUnexpectedException(); |
1051 |
} |
1052 |
} |
1053 |
}); |
1054 |
|
1055 |
try { |
1056 |
lock.writeLock().lock(); |
1057 |
assertTrue(c.getWaitingThreads().isEmpty()); |
1058 |
lock.writeLock().unlock(); |
1059 |
t1.start(); |
1060 |
Thread.sleep(SHORT_DELAY_MS); |
1061 |
t2.start(); |
1062 |
Thread.sleep(SHORT_DELAY_MS); |
1063 |
lock.writeLock().lock(); |
1064 |
assertTrue(c.hasWaiters()); |
1065 |
assertTrue(c.getWaitingThreads().contains(t1)); |
1066 |
assertTrue(c.getWaitingThreads().contains(t2)); |
1067 |
c.signalAll(); |
1068 |
lock.writeLock().unlock(); |
1069 |
Thread.sleep(SHORT_DELAY_MS); |
1070 |
lock.writeLock().lock(); |
1071 |
assertFalse(c.hasWaiters()); |
1072 |
assertTrue(c.getWaitingThreads().isEmpty()); |
1073 |
lock.writeLock().unlock(); |
1074 |
t1.join(SHORT_DELAY_MS); |
1075 |
t2.join(SHORT_DELAY_MS); |
1076 |
assertFalse(t1.isAlive()); |
1077 |
assertFalse(t2.isAlive()); |
1078 |
} |
1079 |
catch (Exception ex) { |
1080 |
unexpectedException(); |
1081 |
} |
1082 |
} |
1083 |
|
1084 |
} |