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.io.*; |
13 |
import java.util.*; |
14 |
|
15 |
public class ReentrantReadWriteLockTest 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(ReentrantReadWriteLockTest.class); |
21 |
} |
22 |
|
23 |
/** |
24 |
* A runnable calling lockInterruptibly |
25 |
*/ |
26 |
class InterruptibleLockRunnable implements Runnable { |
27 |
final ReentrantReadWriteLock lock; |
28 |
InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
29 |
public void run() { |
30 |
try { |
31 |
lock.writeLock().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 ReentrantReadWriteLock lock; |
43 |
InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
44 |
public void run() { |
45 |
try { |
46 |
lock.writeLock().lockInterruptibly(); |
47 |
threadShouldThrow(); |
48 |
} catch(InterruptedException success){} |
49 |
} |
50 |
} |
51 |
|
52 |
/** |
53 |
* Subclass to expose protected methods |
54 |
*/ |
55 |
static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock { |
56 |
PublicReentrantReadWriteLock() { super(); } |
57 |
public Collection<Thread> getQueuedThreads() { |
58 |
return super.getQueuedThreads(); |
59 |
} |
60 |
} |
61 |
|
62 |
/** |
63 |
* Constructor sets given fairness, and is in unlocked state |
64 |
*/ |
65 |
public void testConstructor() { |
66 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
67 |
assertFalse(rl.isFair()); |
68 |
assertFalse(rl.isWriteLocked()); |
69 |
assertEquals(0, rl.getReadLockCount()); |
70 |
ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true); |
71 |
assertTrue(r2.isFair()); |
72 |
assertFalse(r2.isWriteLocked()); |
73 |
assertEquals(0, r2.getReadLockCount()); |
74 |
} |
75 |
|
76 |
/** |
77 |
* write-locking and read-locking an unlocked lock succeed |
78 |
*/ |
79 |
public void testLock() { |
80 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
81 |
rl.writeLock().lock(); |
82 |
assertTrue(rl.isWriteLocked()); |
83 |
assertTrue(rl.isWriteLockedByCurrentThread()); |
84 |
assertEquals(0, rl.getReadLockCount()); |
85 |
rl.writeLock().unlock(); |
86 |
assertFalse(rl.isWriteLocked()); |
87 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
88 |
assertEquals(0, rl.getReadLockCount()); |
89 |
rl.readLock().lock(); |
90 |
assertFalse(rl.isWriteLocked()); |
91 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
92 |
assertEquals(1, rl.getReadLockCount()); |
93 |
rl.readLock().unlock(); |
94 |
assertFalse(rl.isWriteLocked()); |
95 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
96 |
assertEquals(0, rl.getReadLockCount()); |
97 |
} |
98 |
|
99 |
|
100 |
/** |
101 |
* locking an unlocked fair lock succeeds |
102 |
*/ |
103 |
public void testFairLock() { |
104 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true); |
105 |
rl.writeLock().lock(); |
106 |
assertTrue(rl.isWriteLocked()); |
107 |
assertTrue(rl.isWriteLockedByCurrentThread()); |
108 |
assertEquals(0, rl.getReadLockCount()); |
109 |
rl.writeLock().unlock(); |
110 |
assertFalse(rl.isWriteLocked()); |
111 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
112 |
assertEquals(0, rl.getReadLockCount()); |
113 |
rl.readLock().lock(); |
114 |
assertFalse(rl.isWriteLocked()); |
115 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
116 |
assertEquals(1, rl.getReadLockCount()); |
117 |
rl.readLock().unlock(); |
118 |
assertFalse(rl.isWriteLocked()); |
119 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
120 |
assertEquals(0, rl.getReadLockCount()); |
121 |
} |
122 |
|
123 |
/** |
124 |
* getWriteHoldCount returns number of recursive holds |
125 |
*/ |
126 |
public void testGetHoldCount() { |
127 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
128 |
for(int i = 1; i <= SIZE; i++) { |
129 |
lock.writeLock().lock(); |
130 |
assertEquals(i,lock.getWriteHoldCount()); |
131 |
} |
132 |
for(int i = SIZE; i > 0; i--) { |
133 |
lock.writeLock().unlock(); |
134 |
assertEquals(i-1,lock.getWriteHoldCount()); |
135 |
} |
136 |
} |
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|
138 |
|
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/** |
140 |
* write-unlocking an unlocked lock throws IllegalMonitorStateException |
141 |
*/ |
142 |
public void testUnlock_IllegalMonitorStateException() { |
143 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
144 |
try { |
145 |
rl.writeLock().unlock(); |
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shouldThrow(); |
147 |
} catch(IllegalMonitorStateException success){} |
148 |
} |
149 |
|
150 |
|
151 |
/** |
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* write-lockInterruptibly is interruptible |
153 |
*/ |
154 |
public void testWriteLockInterruptibly_Interrupted() { |
155 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
156 |
lock.writeLock().lock(); |
157 |
Thread t = new Thread(new Runnable() { |
158 |
public void run() { |
159 |
try { |
160 |
lock.writeLock().lockInterruptibly(); |
161 |
threadShouldThrow(); |
162 |
} catch(InterruptedException success){} |
163 |
} |
164 |
}); |
165 |
try { |
166 |
t.start(); |
167 |
t.interrupt(); |
168 |
lock.writeLock().unlock(); |
169 |
t.join(); |
170 |
} catch(Exception e){ |
171 |
unexpectedException(); |
172 |
} |
173 |
} |
174 |
|
175 |
/** |
176 |
* timed write-trylock is interruptible |
177 |
*/ |
178 |
public void testWriteTryLock_Interrupted() { |
179 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
180 |
lock.writeLock().lock(); |
181 |
Thread t = new Thread(new Runnable() { |
182 |
public void run() { |
183 |
try { |
184 |
lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
185 |
threadShouldThrow(); |
186 |
} catch(InterruptedException success){} |
187 |
} |
188 |
}); |
189 |
try { |
190 |
t.start(); |
191 |
t.interrupt(); |
192 |
lock.writeLock().unlock(); |
193 |
t.join(); |
194 |
} catch(Exception e){ |
195 |
unexpectedException(); |
196 |
} |
197 |
} |
198 |
|
199 |
/** |
200 |
* read-lockInterruptibly is interruptible |
201 |
*/ |
202 |
public void testReadLockInterruptibly_Interrupted() { |
203 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
204 |
lock.writeLock().lock(); |
205 |
Thread t = new Thread(new Runnable() { |
206 |
public void run() { |
207 |
try { |
208 |
lock.readLock().lockInterruptibly(); |
209 |
threadShouldThrow(); |
210 |
} catch(InterruptedException success){} |
211 |
} |
212 |
}); |
213 |
try { |
214 |
t.start(); |
215 |
t.interrupt(); |
216 |
lock.writeLock().unlock(); |
217 |
t.join(); |
218 |
} catch(Exception e){ |
219 |
unexpectedException(); |
220 |
} |
221 |
} |
222 |
|
223 |
/** |
224 |
* timed read-trylock is interruptible |
225 |
*/ |
226 |
public void testReadTryLock_Interrupted() { |
227 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
228 |
lock.writeLock().lock(); |
229 |
Thread t = new Thread(new Runnable() { |
230 |
public void run() { |
231 |
try { |
232 |
lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS); |
233 |
threadShouldThrow(); |
234 |
} catch(InterruptedException success){} |
235 |
} |
236 |
}); |
237 |
try { |
238 |
t.start(); |
239 |
t.interrupt(); |
240 |
t.join(); |
241 |
} catch(Exception e){ |
242 |
unexpectedException(); |
243 |
} |
244 |
} |
245 |
|
246 |
|
247 |
/** |
248 |
* write-trylock fails if locked |
249 |
*/ |
250 |
public void testWriteTryLockWhenLocked() { |
251 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
252 |
lock.writeLock().lock(); |
253 |
Thread t = new Thread(new Runnable() { |
254 |
public void run() { |
255 |
threadAssertFalse(lock.writeLock().tryLock()); |
256 |
} |
257 |
}); |
258 |
try { |
259 |
t.start(); |
260 |
t.join(); |
261 |
lock.writeLock().unlock(); |
262 |
} catch(Exception e){ |
263 |
unexpectedException(); |
264 |
} |
265 |
} |
266 |
|
267 |
/** |
268 |
* read-trylock fails if locked |
269 |
*/ |
270 |
public void testReadTryLockWhenLocked() { |
271 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
272 |
lock.writeLock().lock(); |
273 |
Thread t = new Thread(new Runnable() { |
274 |
public void run() { |
275 |
threadAssertFalse(lock.readLock().tryLock()); |
276 |
} |
277 |
}); |
278 |
try { |
279 |
t.start(); |
280 |
t.join(); |
281 |
lock.writeLock().unlock(); |
282 |
} catch(Exception e){ |
283 |
unexpectedException(); |
284 |
} |
285 |
} |
286 |
|
287 |
/** |
288 |
* Multiple threads can hold a read lock when not write-locked |
289 |
*/ |
290 |
public void testMultipleReadLocks() { |
291 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
292 |
lock.readLock().lock(); |
293 |
Thread t = new Thread(new Runnable() { |
294 |
public void run() { |
295 |
threadAssertTrue(lock.readLock().tryLock()); |
296 |
lock.readLock().unlock(); |
297 |
} |
298 |
}); |
299 |
try { |
300 |
t.start(); |
301 |
t.join(); |
302 |
lock.readLock().unlock(); |
303 |
} catch(Exception e){ |
304 |
unexpectedException(); |
305 |
} |
306 |
} |
307 |
|
308 |
/** |
309 |
* A writelock succeeds after reading threads unlock |
310 |
*/ |
311 |
public void testWriteAfterMultipleReadLocks() { |
312 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
313 |
lock.readLock().lock(); |
314 |
Thread t1 = new Thread(new Runnable() { |
315 |
public void run() { |
316 |
lock.readLock().lock(); |
317 |
lock.readLock().unlock(); |
318 |
} |
319 |
}); |
320 |
Thread t2 = new Thread(new Runnable() { |
321 |
public void run() { |
322 |
lock.writeLock().lock(); |
323 |
lock.writeLock().unlock(); |
324 |
} |
325 |
}); |
326 |
|
327 |
try { |
328 |
t1.start(); |
329 |
t2.start(); |
330 |
Thread.sleep(SHORT_DELAY_MS); |
331 |
lock.readLock().unlock(); |
332 |
t1.join(MEDIUM_DELAY_MS); |
333 |
t2.join(MEDIUM_DELAY_MS); |
334 |
assertTrue(!t1.isAlive()); |
335 |
assertTrue(!t2.isAlive()); |
336 |
|
337 |
} catch(Exception e){ |
338 |
unexpectedException(); |
339 |
} |
340 |
} |
341 |
|
342 |
/** |
343 |
* Readlocks succeed after a writing thread unlocks |
344 |
*/ |
345 |
public void testReadAfterWriteLock() { |
346 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
347 |
lock.writeLock().lock(); |
348 |
Thread t1 = new Thread(new Runnable() { |
349 |
public void run() { |
350 |
lock.readLock().lock(); |
351 |
lock.readLock().unlock(); |
352 |
} |
353 |
}); |
354 |
Thread t2 = new Thread(new Runnable() { |
355 |
public void run() { |
356 |
lock.readLock().lock(); |
357 |
lock.readLock().unlock(); |
358 |
} |
359 |
}); |
360 |
|
361 |
try { |
362 |
t1.start(); |
363 |
t2.start(); |
364 |
Thread.sleep(SHORT_DELAY_MS); |
365 |
lock.writeLock().unlock(); |
366 |
t1.join(MEDIUM_DELAY_MS); |
367 |
t2.join(MEDIUM_DELAY_MS); |
368 |
assertTrue(!t1.isAlive()); |
369 |
assertTrue(!t2.isAlive()); |
370 |
|
371 |
} catch(Exception e){ |
372 |
unexpectedException(); |
373 |
} |
374 |
} |
375 |
|
376 |
|
377 |
/** |
378 |
* Read trylock succeeds if readlocked but not writelocked |
379 |
*/ |
380 |
public void testTryLockWhenReadLocked() { |
381 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
382 |
lock.readLock().lock(); |
383 |
Thread t = new Thread(new Runnable() { |
384 |
public void run() { |
385 |
threadAssertTrue(lock.readLock().tryLock()); |
386 |
lock.readLock().unlock(); |
387 |
} |
388 |
}); |
389 |
try { |
390 |
t.start(); |
391 |
t.join(); |
392 |
lock.readLock().unlock(); |
393 |
} catch(Exception e){ |
394 |
unexpectedException(); |
395 |
} |
396 |
} |
397 |
|
398 |
|
399 |
|
400 |
/** |
401 |
* write trylock fails when readlocked |
402 |
*/ |
403 |
public void testWriteTryLockWhenReadLocked() { |
404 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
405 |
lock.readLock().lock(); |
406 |
Thread t = new Thread(new Runnable() { |
407 |
public void run() { |
408 |
threadAssertFalse(lock.writeLock().tryLock()); |
409 |
} |
410 |
}); |
411 |
try { |
412 |
t.start(); |
413 |
t.join(); |
414 |
lock.readLock().unlock(); |
415 |
} catch(Exception e){ |
416 |
unexpectedException(); |
417 |
} |
418 |
} |
419 |
|
420 |
|
421 |
|
422 |
/** |
423 |
* write timed trylock times out if locked |
424 |
*/ |
425 |
public void testWriteTryLock_Timeout() { |
426 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
427 |
lock.writeLock().lock(); |
428 |
Thread t = new Thread(new Runnable() { |
429 |
public void run() { |
430 |
try { |
431 |
threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS)); |
432 |
} catch (Exception ex) { |
433 |
threadUnexpectedException(); |
434 |
} |
435 |
} |
436 |
}); |
437 |
try { |
438 |
t.start(); |
439 |
t.join(); |
440 |
lock.writeLock().unlock(); |
441 |
} catch(Exception e){ |
442 |
unexpectedException(); |
443 |
} |
444 |
} |
445 |
|
446 |
/** |
447 |
* read timed trylock times out if write-locked |
448 |
*/ |
449 |
public void testReadTryLock_Timeout() { |
450 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
451 |
lock.writeLock().lock(); |
452 |
Thread t = new Thread(new Runnable() { |
453 |
public void run() { |
454 |
try { |
455 |
threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS)); |
456 |
} catch (Exception ex) { |
457 |
threadUnexpectedException(); |
458 |
} |
459 |
} |
460 |
}); |
461 |
try { |
462 |
t.start(); |
463 |
t.join(); |
464 |
lock.writeLock().unlock(); |
465 |
} catch(Exception e){ |
466 |
unexpectedException(); |
467 |
} |
468 |
} |
469 |
|
470 |
|
471 |
/** |
472 |
* write lockInterruptibly succeeds if lock free else is interruptible |
473 |
*/ |
474 |
public void testWriteLockInterruptibly() { |
475 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
476 |
try { |
477 |
lock.writeLock().lockInterruptibly(); |
478 |
} catch(Exception e) { |
479 |
unexpectedException(); |
480 |
} |
481 |
Thread t = new Thread(new Runnable() { |
482 |
public void run() { |
483 |
try { |
484 |
lock.writeLock().lockInterruptibly(); |
485 |
threadShouldThrow(); |
486 |
} |
487 |
catch(InterruptedException success) { |
488 |
} |
489 |
} |
490 |
}); |
491 |
try { |
492 |
t.start(); |
493 |
t.interrupt(); |
494 |
t.join(); |
495 |
lock.writeLock().unlock(); |
496 |
} catch(Exception e){ |
497 |
unexpectedException(); |
498 |
} |
499 |
} |
500 |
|
501 |
/** |
502 |
* read lockInterruptibly succeeds if lock free else is interruptible |
503 |
*/ |
504 |
public void testReadLockInterruptibly() { |
505 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
506 |
try { |
507 |
lock.writeLock().lockInterruptibly(); |
508 |
} catch(Exception e) { |
509 |
unexpectedException(); |
510 |
} |
511 |
Thread t = new Thread(new Runnable() { |
512 |
public void run() { |
513 |
try { |
514 |
lock.readLock().lockInterruptibly(); |
515 |
threadShouldThrow(); |
516 |
} |
517 |
catch(InterruptedException success) { |
518 |
} |
519 |
} |
520 |
}); |
521 |
try { |
522 |
t.start(); |
523 |
t.interrupt(); |
524 |
t.join(); |
525 |
lock.writeLock().unlock(); |
526 |
} catch(Exception e){ |
527 |
unexpectedException(); |
528 |
} |
529 |
} |
530 |
|
531 |
/** |
532 |
* Calling await without holding lock throws IllegalMonitorStateException |
533 |
*/ |
534 |
public void testAwait_IllegalMonitor() { |
535 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
536 |
final Condition c = lock.writeLock().newCondition(); |
537 |
try { |
538 |
c.await(); |
539 |
shouldThrow(); |
540 |
} |
541 |
catch (IllegalMonitorStateException success) { |
542 |
} |
543 |
catch (Exception ex) { |
544 |
shouldThrow(); |
545 |
} |
546 |
} |
547 |
|
548 |
/** |
549 |
* Calling signal without holding lock throws IllegalMonitorStateException |
550 |
*/ |
551 |
public void testSignal_IllegalMonitor() { |
552 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
553 |
final Condition c = lock.writeLock().newCondition(); |
554 |
try { |
555 |
c.signal(); |
556 |
shouldThrow(); |
557 |
} |
558 |
catch (IllegalMonitorStateException success) { |
559 |
} |
560 |
catch (Exception ex) { |
561 |
unexpectedException(); |
562 |
} |
563 |
} |
564 |
|
565 |
/** |
566 |
* awaitNanos without a signal times out |
567 |
*/ |
568 |
public void testAwaitNanos_Timeout() { |
569 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
570 |
final Condition c = lock.writeLock().newCondition(); |
571 |
try { |
572 |
lock.writeLock().lock(); |
573 |
long t = c.awaitNanos(100); |
574 |
assertTrue(t <= 0); |
575 |
lock.writeLock().unlock(); |
576 |
} |
577 |
catch (Exception ex) { |
578 |
unexpectedException(); |
579 |
} |
580 |
} |
581 |
|
582 |
|
583 |
/** |
584 |
* timed await without a signal times out |
585 |
*/ |
586 |
public void testAwait_Timeout() { |
587 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
588 |
final Condition c = lock.writeLock().newCondition(); |
589 |
try { |
590 |
lock.writeLock().lock(); |
591 |
assertFalse(c.await(10, TimeUnit.MILLISECONDS)); |
592 |
lock.writeLock().unlock(); |
593 |
} |
594 |
catch (Exception ex) { |
595 |
unexpectedException(); |
596 |
} |
597 |
} |
598 |
|
599 |
/** |
600 |
* awaitUntil without a signal times out |
601 |
*/ |
602 |
public void testAwaitUntil_Timeout() { |
603 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
604 |
final Condition c = lock.writeLock().newCondition(); |
605 |
try { |
606 |
lock.writeLock().lock(); |
607 |
java.util.Date d = new java.util.Date(); |
608 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
609 |
lock.writeLock().unlock(); |
610 |
} |
611 |
catch (Exception ex) { |
612 |
unexpectedException(); |
613 |
} |
614 |
} |
615 |
|
616 |
/** |
617 |
* await returns when signalled |
618 |
*/ |
619 |
public void testAwait() { |
620 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
621 |
final Condition c = lock.writeLock().newCondition(); |
622 |
Thread t = new Thread(new Runnable() { |
623 |
public void run() { |
624 |
try { |
625 |
lock.writeLock().lock(); |
626 |
c.await(); |
627 |
lock.writeLock().unlock(); |
628 |
} |
629 |
catch(InterruptedException e) { |
630 |
threadUnexpectedException(); |
631 |
} |
632 |
} |
633 |
}); |
634 |
|
635 |
try { |
636 |
t.start(); |
637 |
Thread.sleep(SHORT_DELAY_MS); |
638 |
lock.writeLock().lock(); |
639 |
c.signal(); |
640 |
lock.writeLock().unlock(); |
641 |
t.join(SHORT_DELAY_MS); |
642 |
assertFalse(t.isAlive()); |
643 |
} |
644 |
catch (Exception ex) { |
645 |
unexpectedException(); |
646 |
} |
647 |
} |
648 |
|
649 |
/** |
650 |
* awaitUninterruptibly doesn't abort on interrupt |
651 |
*/ |
652 |
public void testAwaitUninterruptibly() { |
653 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
654 |
final Condition c = lock.writeLock().newCondition(); |
655 |
Thread t = new Thread(new Runnable() { |
656 |
public void run() { |
657 |
lock.writeLock().lock(); |
658 |
c.awaitUninterruptibly(); |
659 |
lock.writeLock().unlock(); |
660 |
} |
661 |
}); |
662 |
|
663 |
try { |
664 |
t.start(); |
665 |
Thread.sleep(SHORT_DELAY_MS); |
666 |
t.interrupt(); |
667 |
lock.writeLock().lock(); |
668 |
c.signal(); |
669 |
lock.writeLock().unlock(); |
670 |
assert(t.isInterrupted()); |
671 |
t.join(SHORT_DELAY_MS); |
672 |
assertFalse(t.isAlive()); |
673 |
} |
674 |
catch (Exception ex) { |
675 |
unexpectedException(); |
676 |
} |
677 |
} |
678 |
|
679 |
/** |
680 |
* await is interruptible |
681 |
*/ |
682 |
public void testAwait_Interrupt() { |
683 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
684 |
final Condition c = lock.writeLock().newCondition(); |
685 |
Thread t = new Thread(new Runnable() { |
686 |
public void run() { |
687 |
try { |
688 |
lock.writeLock().lock(); |
689 |
c.await(); |
690 |
lock.writeLock().unlock(); |
691 |
threadShouldThrow(); |
692 |
} |
693 |
catch(InterruptedException success) { |
694 |
} |
695 |
} |
696 |
}); |
697 |
|
698 |
try { |
699 |
t.start(); |
700 |
Thread.sleep(SHORT_DELAY_MS); |
701 |
t.interrupt(); |
702 |
t.join(SHORT_DELAY_MS); |
703 |
assertFalse(t.isAlive()); |
704 |
} |
705 |
catch (Exception ex) { |
706 |
unexpectedException(); |
707 |
} |
708 |
} |
709 |
|
710 |
/** |
711 |
* awaitNanos is interruptible |
712 |
*/ |
713 |
public void testAwaitNanos_Interrupt() { |
714 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
715 |
final Condition c = lock.writeLock().newCondition(); |
716 |
Thread t = new Thread(new Runnable() { |
717 |
public void run() { |
718 |
try { |
719 |
lock.writeLock().lock(); |
720 |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
721 |
lock.writeLock().unlock(); |
722 |
threadShouldThrow(); |
723 |
} |
724 |
catch(InterruptedException success) { |
725 |
} |
726 |
} |
727 |
}); |
728 |
|
729 |
try { |
730 |
t.start(); |
731 |
Thread.sleep(SHORT_DELAY_MS); |
732 |
t.interrupt(); |
733 |
t.join(SHORT_DELAY_MS); |
734 |
assertFalse(t.isAlive()); |
735 |
} |
736 |
catch (Exception ex) { |
737 |
unexpectedException(); |
738 |
} |
739 |
} |
740 |
|
741 |
/** |
742 |
* awaitUntil is interruptible |
743 |
*/ |
744 |
public void testAwaitUntil_Interrupt() { |
745 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
746 |
final Condition c = lock.writeLock().newCondition(); |
747 |
Thread t = new Thread(new Runnable() { |
748 |
public void run() { |
749 |
try { |
750 |
lock.writeLock().lock(); |
751 |
java.util.Date d = new java.util.Date(); |
752 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
753 |
lock.writeLock().unlock(); |
754 |
threadShouldThrow(); |
755 |
} |
756 |
catch(InterruptedException success) { |
757 |
} |
758 |
} |
759 |
}); |
760 |
|
761 |
try { |
762 |
t.start(); |
763 |
Thread.sleep(SHORT_DELAY_MS); |
764 |
t.interrupt(); |
765 |
t.join(SHORT_DELAY_MS); |
766 |
assertFalse(t.isAlive()); |
767 |
} |
768 |
catch (Exception ex) { |
769 |
unexpectedException(); |
770 |
} |
771 |
} |
772 |
|
773 |
/** |
774 |
* signalAll wakes up all threads |
775 |
*/ |
776 |
public void testSignalAll() { |
777 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
778 |
final Condition c = lock.writeLock().newCondition(); |
779 |
Thread t1 = new Thread(new Runnable() { |
780 |
public void run() { |
781 |
try { |
782 |
lock.writeLock().lock(); |
783 |
c.await(); |
784 |
lock.writeLock().unlock(); |
785 |
} |
786 |
catch(InterruptedException e) { |
787 |
threadUnexpectedException(); |
788 |
} |
789 |
} |
790 |
}); |
791 |
|
792 |
Thread t2 = new Thread(new Runnable() { |
793 |
public void run() { |
794 |
try { |
795 |
lock.writeLock().lock(); |
796 |
c.await(); |
797 |
lock.writeLock().unlock(); |
798 |
} |
799 |
catch(InterruptedException e) { |
800 |
threadUnexpectedException(); |
801 |
} |
802 |
} |
803 |
}); |
804 |
|
805 |
try { |
806 |
t1.start(); |
807 |
t2.start(); |
808 |
Thread.sleep(SHORT_DELAY_MS); |
809 |
lock.writeLock().lock(); |
810 |
c.signalAll(); |
811 |
lock.writeLock().unlock(); |
812 |
t1.join(SHORT_DELAY_MS); |
813 |
t2.join(SHORT_DELAY_MS); |
814 |
assertFalse(t1.isAlive()); |
815 |
assertFalse(t2.isAlive()); |
816 |
} |
817 |
catch (Exception ex) { |
818 |
unexpectedException(); |
819 |
} |
820 |
} |
821 |
|
822 |
/** |
823 |
* A serialized lock deserializes as unlocked |
824 |
*/ |
825 |
public void testSerialization() { |
826 |
ReentrantReadWriteLock l = new ReentrantReadWriteLock(); |
827 |
l.readLock().lock(); |
828 |
l.readLock().unlock(); |
829 |
|
830 |
try { |
831 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
832 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
833 |
out.writeObject(l); |
834 |
out.close(); |
835 |
|
836 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
837 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
838 |
ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject(); |
839 |
r.readLock().lock(); |
840 |
r.readLock().unlock(); |
841 |
} catch(Exception e){ |
842 |
e.printStackTrace(); |
843 |
unexpectedException(); |
844 |
} |
845 |
} |
846 |
|
847 |
/** |
848 |
* getQueueLength reports number of waiting threads |
849 |
*/ |
850 |
public void testGetQueueLength() { |
851 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
852 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
853 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
854 |
try { |
855 |
assertEquals(0, lock.getQueueLength()); |
856 |
lock.writeLock().lock(); |
857 |
t1.start(); |
858 |
Thread.sleep(SHORT_DELAY_MS); |
859 |
assertEquals(1, lock.getQueueLength()); |
860 |
t2.start(); |
861 |
Thread.sleep(SHORT_DELAY_MS); |
862 |
assertEquals(2, lock.getQueueLength()); |
863 |
t1.interrupt(); |
864 |
Thread.sleep(SHORT_DELAY_MS); |
865 |
assertEquals(1, lock.getQueueLength()); |
866 |
lock.writeLock().unlock(); |
867 |
Thread.sleep(SHORT_DELAY_MS); |
868 |
assertEquals(0, lock.getQueueLength()); |
869 |
t1.join(); |
870 |
t2.join(); |
871 |
} catch(Exception e){ |
872 |
unexpectedException(); |
873 |
} |
874 |
} |
875 |
|
876 |
/** |
877 |
* getQueuedThreads includes waiting threads |
878 |
*/ |
879 |
public void testGetQueuedThreads() { |
880 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
881 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
882 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
883 |
try { |
884 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
885 |
lock.writeLock().lock(); |
886 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
887 |
t1.start(); |
888 |
Thread.sleep(SHORT_DELAY_MS); |
889 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
890 |
t2.start(); |
891 |
Thread.sleep(SHORT_DELAY_MS); |
892 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
893 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
894 |
t1.interrupt(); |
895 |
Thread.sleep(SHORT_DELAY_MS); |
896 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
897 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
898 |
lock.writeLock().unlock(); |
899 |
Thread.sleep(SHORT_DELAY_MS); |
900 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
901 |
t1.join(); |
902 |
t2.join(); |
903 |
} catch(Exception e){ |
904 |
unexpectedException(); |
905 |
} |
906 |
} |
907 |
|
908 |
/** |
909 |
* hasWaiters returns true when a thread is waiting, else false |
910 |
*/ |
911 |
public void testHasWaiters() { |
912 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
913 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition()); |
914 |
Thread t = new Thread(new Runnable() { |
915 |
public void run() { |
916 |
try { |
917 |
lock.writeLock().lock(); |
918 |
threadAssertFalse(c.hasWaiters()); |
919 |
threadAssertEquals(0, c.getWaitQueueLength()); |
920 |
c.await(); |
921 |
lock.writeLock().unlock(); |
922 |
} |
923 |
catch(InterruptedException e) { |
924 |
threadUnexpectedException(); |
925 |
} |
926 |
} |
927 |
}); |
928 |
|
929 |
try { |
930 |
t.start(); |
931 |
Thread.sleep(SHORT_DELAY_MS); |
932 |
lock.writeLock().lock(); |
933 |
assertTrue(c.hasWaiters()); |
934 |
assertEquals(1, c.getWaitQueueLength()); |
935 |
c.signal(); |
936 |
lock.writeLock().unlock(); |
937 |
Thread.sleep(SHORT_DELAY_MS); |
938 |
lock.writeLock().lock(); |
939 |
assertFalse(c.hasWaiters()); |
940 |
assertEquals(0, c.getWaitQueueLength()); |
941 |
lock.writeLock().unlock(); |
942 |
t.join(SHORT_DELAY_MS); |
943 |
assertFalse(t.isAlive()); |
944 |
} |
945 |
catch (Exception ex) { |
946 |
unexpectedException(); |
947 |
} |
948 |
} |
949 |
|
950 |
/** |
951 |
* getWaitQueueLength returns number of waiting threads |
952 |
*/ |
953 |
public void testGetWaitQueueLength() { |
954 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
955 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition()); |
956 |
Thread t1 = new Thread(new Runnable() { |
957 |
public void run() { |
958 |
try { |
959 |
lock.writeLock().lock(); |
960 |
threadAssertFalse(c.hasWaiters()); |
961 |
threadAssertEquals(0, c.getWaitQueueLength()); |
962 |
c.await(); |
963 |
lock.writeLock().unlock(); |
964 |
} |
965 |
catch(InterruptedException e) { |
966 |
threadUnexpectedException(); |
967 |
} |
968 |
} |
969 |
}); |
970 |
|
971 |
Thread t2 = new Thread(new Runnable() { |
972 |
public void run() { |
973 |
try { |
974 |
lock.writeLock().lock(); |
975 |
threadAssertTrue(c.hasWaiters()); |
976 |
threadAssertEquals(1, c.getWaitQueueLength()); |
977 |
c.await(); |
978 |
lock.writeLock().unlock(); |
979 |
} |
980 |
catch(InterruptedException e) { |
981 |
threadUnexpectedException(); |
982 |
} |
983 |
} |
984 |
}); |
985 |
|
986 |
try { |
987 |
t1.start(); |
988 |
Thread.sleep(SHORT_DELAY_MS); |
989 |
t2.start(); |
990 |
Thread.sleep(SHORT_DELAY_MS); |
991 |
lock.writeLock().lock(); |
992 |
assertTrue(c.hasWaiters()); |
993 |
assertEquals(2, c.getWaitQueueLength()); |
994 |
c.signalAll(); |
995 |
lock.writeLock().unlock(); |
996 |
Thread.sleep(SHORT_DELAY_MS); |
997 |
lock.writeLock().lock(); |
998 |
assertFalse(c.hasWaiters()); |
999 |
assertEquals(0, c.getWaitQueueLength()); |
1000 |
lock.writeLock().unlock(); |
1001 |
t1.join(SHORT_DELAY_MS); |
1002 |
t2.join(SHORT_DELAY_MS); |
1003 |
assertFalse(t1.isAlive()); |
1004 |
assertFalse(t2.isAlive()); |
1005 |
} |
1006 |
catch (Exception ex) { |
1007 |
unexpectedException(); |
1008 |
} |
1009 |
} |
1010 |
} |