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 |
public Collection<Thread> getWaitingThreads(Condition c) { |
61 |
return super.getWaitingThreads(c); |
62 |
} |
63 |
} |
64 |
|
65 |
/** |
66 |
* Constructor sets given fairness, and is in unlocked state |
67 |
*/ |
68 |
public void testConstructor() { |
69 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
70 |
assertFalse(rl.isFair()); |
71 |
assertFalse(rl.isWriteLocked()); |
72 |
assertEquals(0, rl.getReadLockCount()); |
73 |
ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true); |
74 |
assertTrue(r2.isFair()); |
75 |
assertFalse(r2.isWriteLocked()); |
76 |
assertEquals(0, r2.getReadLockCount()); |
77 |
} |
78 |
|
79 |
/** |
80 |
* write-locking and read-locking an unlocked lock succeed |
81 |
*/ |
82 |
public void testLock() { |
83 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
84 |
rl.writeLock().lock(); |
85 |
assertTrue(rl.isWriteLocked()); |
86 |
assertTrue(rl.isWriteLockedByCurrentThread()); |
87 |
assertEquals(0, rl.getReadLockCount()); |
88 |
rl.writeLock().unlock(); |
89 |
assertFalse(rl.isWriteLocked()); |
90 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
91 |
assertEquals(0, rl.getReadLockCount()); |
92 |
rl.readLock().lock(); |
93 |
assertFalse(rl.isWriteLocked()); |
94 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
95 |
assertEquals(1, rl.getReadLockCount()); |
96 |
rl.readLock().unlock(); |
97 |
assertFalse(rl.isWriteLocked()); |
98 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
99 |
assertEquals(0, rl.getReadLockCount()); |
100 |
} |
101 |
|
102 |
|
103 |
/** |
104 |
* locking an unlocked fair lock succeeds |
105 |
*/ |
106 |
public void testFairLock() { |
107 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true); |
108 |
rl.writeLock().lock(); |
109 |
assertTrue(rl.isWriteLocked()); |
110 |
assertTrue(rl.isWriteLockedByCurrentThread()); |
111 |
assertEquals(0, rl.getReadLockCount()); |
112 |
rl.writeLock().unlock(); |
113 |
assertFalse(rl.isWriteLocked()); |
114 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
115 |
assertEquals(0, rl.getReadLockCount()); |
116 |
rl.readLock().lock(); |
117 |
assertFalse(rl.isWriteLocked()); |
118 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
119 |
assertEquals(1, rl.getReadLockCount()); |
120 |
rl.readLock().unlock(); |
121 |
assertFalse(rl.isWriteLocked()); |
122 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
123 |
assertEquals(0, rl.getReadLockCount()); |
124 |
} |
125 |
|
126 |
/** |
127 |
* getWriteHoldCount returns number of recursive holds |
128 |
*/ |
129 |
public void testGetWriteHoldCount() { |
130 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
131 |
for(int i = 1; i <= SIZE; i++) { |
132 |
lock.writeLock().lock(); |
133 |
assertEquals(i,lock.getWriteHoldCount()); |
134 |
} |
135 |
for(int i = SIZE; i > 0; i--) { |
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lock.writeLock().unlock(); |
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assertEquals(i-1,lock.getWriteHoldCount()); |
138 |
} |
139 |
} |
140 |
|
141 |
/** |
142 |
* getReadHoldCount returns number of recursive holds |
143 |
*/ |
144 |
public void testGetReadHoldCount() { |
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ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
146 |
for(int i = 1; i <= SIZE; i++) { |
147 |
lock.readLock().lock(); |
148 |
assertEquals(i,lock.getReadHoldCount()); |
149 |
} |
150 |
for(int i = SIZE; i > 0; i--) { |
151 |
lock.readLock().unlock(); |
152 |
assertEquals(i-1,lock.getReadHoldCount()); |
153 |
} |
154 |
} |
155 |
|
156 |
|
157 |
/** |
158 |
* write-unlocking an unlocked lock throws IllegalMonitorStateException |
159 |
*/ |
160 |
public void testUnlock_IllegalMonitorStateException() { |
161 |
ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
162 |
try { |
163 |
rl.writeLock().unlock(); |
164 |
shouldThrow(); |
165 |
} catch(IllegalMonitorStateException success){} |
166 |
} |
167 |
|
168 |
|
169 |
/** |
170 |
* write-lockInterruptibly is interruptible |
171 |
*/ |
172 |
public void testWriteLockInterruptibly_Interrupted() { |
173 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
174 |
Thread t = new Thread(new Runnable() { |
175 |
public void run() { |
176 |
try { |
177 |
lock.writeLock().lockInterruptibly(); |
178 |
lock.writeLock().unlock(); |
179 |
lock.writeLock().lockInterruptibly(); |
180 |
lock.writeLock().unlock(); |
181 |
} catch(InterruptedException success){} |
182 |
} |
183 |
}); |
184 |
try { |
185 |
lock.writeLock().lock(); |
186 |
t.start(); |
187 |
t.interrupt(); |
188 |
lock.writeLock().unlock(); |
189 |
t.join(); |
190 |
} catch(Exception e){ |
191 |
unexpectedException(); |
192 |
} |
193 |
} |
194 |
|
195 |
/** |
196 |
* timed write-tryLock is interruptible |
197 |
*/ |
198 |
public void testWriteTryLock_Interrupted() { |
199 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
200 |
lock.writeLock().lock(); |
201 |
Thread t = new Thread(new Runnable() { |
202 |
public void run() { |
203 |
try { |
204 |
lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
205 |
} catch(InterruptedException success){} |
206 |
} |
207 |
}); |
208 |
try { |
209 |
t.start(); |
210 |
t.interrupt(); |
211 |
lock.writeLock().unlock(); |
212 |
t.join(); |
213 |
} catch(Exception e){ |
214 |
unexpectedException(); |
215 |
} |
216 |
} |
217 |
|
218 |
/** |
219 |
* read-lockInterruptibly is interruptible |
220 |
*/ |
221 |
public void testReadLockInterruptibly_Interrupted() { |
222 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
223 |
lock.writeLock().lock(); |
224 |
Thread t = new Thread(new Runnable() { |
225 |
public void run() { |
226 |
try { |
227 |
lock.readLock().lockInterruptibly(); |
228 |
} catch(InterruptedException success){} |
229 |
} |
230 |
}); |
231 |
try { |
232 |
t.start(); |
233 |
t.interrupt(); |
234 |
lock.writeLock().unlock(); |
235 |
t.join(); |
236 |
} catch(Exception e){ |
237 |
unexpectedException(); |
238 |
} |
239 |
} |
240 |
|
241 |
/** |
242 |
* timed read-tryLock is interruptible |
243 |
*/ |
244 |
public void testReadTryLock_Interrupted() { |
245 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
246 |
lock.writeLock().lock(); |
247 |
Thread t = new Thread(new Runnable() { |
248 |
public void run() { |
249 |
try { |
250 |
lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS); |
251 |
threadShouldThrow(); |
252 |
} catch(InterruptedException success){} |
253 |
} |
254 |
}); |
255 |
try { |
256 |
t.start(); |
257 |
t.interrupt(); |
258 |
t.join(); |
259 |
} catch(Exception e){ |
260 |
unexpectedException(); |
261 |
} |
262 |
} |
263 |
|
264 |
|
265 |
/** |
266 |
* write-tryLock fails if locked |
267 |
*/ |
268 |
public void testWriteTryLockWhenLocked() { |
269 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
270 |
lock.writeLock().lock(); |
271 |
Thread t = new Thread(new Runnable() { |
272 |
public void run() { |
273 |
threadAssertFalse(lock.writeLock().tryLock()); |
274 |
} |
275 |
}); |
276 |
try { |
277 |
t.start(); |
278 |
t.join(); |
279 |
lock.writeLock().unlock(); |
280 |
} catch(Exception e){ |
281 |
unexpectedException(); |
282 |
} |
283 |
} |
284 |
|
285 |
/** |
286 |
* read-tryLock fails if locked |
287 |
*/ |
288 |
public void testReadTryLockWhenLocked() { |
289 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
290 |
lock.writeLock().lock(); |
291 |
Thread t = new Thread(new Runnable() { |
292 |
public void run() { |
293 |
threadAssertFalse(lock.readLock().tryLock()); |
294 |
} |
295 |
}); |
296 |
try { |
297 |
t.start(); |
298 |
t.join(); |
299 |
lock.writeLock().unlock(); |
300 |
} catch(Exception e){ |
301 |
unexpectedException(); |
302 |
} |
303 |
} |
304 |
|
305 |
/** |
306 |
* Multiple threads can hold a read lock when not write-locked |
307 |
*/ |
308 |
public void testMultipleReadLocks() { |
309 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
310 |
lock.readLock().lock(); |
311 |
Thread t = new Thread(new Runnable() { |
312 |
public void run() { |
313 |
threadAssertTrue(lock.readLock().tryLock()); |
314 |
lock.readLock().unlock(); |
315 |
} |
316 |
}); |
317 |
try { |
318 |
t.start(); |
319 |
t.join(); |
320 |
lock.readLock().unlock(); |
321 |
} catch(Exception e){ |
322 |
unexpectedException(); |
323 |
} |
324 |
} |
325 |
|
326 |
/** |
327 |
* A writelock succeeds after reading threads unlock |
328 |
*/ |
329 |
public void testWriteAfterMultipleReadLocks() { |
330 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
331 |
lock.readLock().lock(); |
332 |
Thread t1 = new Thread(new Runnable() { |
333 |
public void run() { |
334 |
lock.readLock().lock(); |
335 |
lock.readLock().unlock(); |
336 |
} |
337 |
}); |
338 |
Thread t2 = new Thread(new Runnable() { |
339 |
public void run() { |
340 |
lock.writeLock().lock(); |
341 |
lock.writeLock().unlock(); |
342 |
} |
343 |
}); |
344 |
|
345 |
try { |
346 |
t1.start(); |
347 |
t2.start(); |
348 |
Thread.sleep(SHORT_DELAY_MS); |
349 |
lock.readLock().unlock(); |
350 |
t1.join(MEDIUM_DELAY_MS); |
351 |
t2.join(MEDIUM_DELAY_MS); |
352 |
assertTrue(!t1.isAlive()); |
353 |
assertTrue(!t2.isAlive()); |
354 |
|
355 |
} catch(Exception e){ |
356 |
unexpectedException(); |
357 |
} |
358 |
} |
359 |
|
360 |
/** |
361 |
* Readlocks succeed after a writing thread unlocks |
362 |
*/ |
363 |
public void testReadAfterWriteLock() { |
364 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
365 |
lock.writeLock().lock(); |
366 |
Thread t1 = new Thread(new Runnable() { |
367 |
public void run() { |
368 |
lock.readLock().lock(); |
369 |
lock.readLock().unlock(); |
370 |
} |
371 |
}); |
372 |
Thread t2 = new Thread(new Runnable() { |
373 |
public void run() { |
374 |
lock.readLock().lock(); |
375 |
lock.readLock().unlock(); |
376 |
} |
377 |
}); |
378 |
|
379 |
try { |
380 |
t1.start(); |
381 |
t2.start(); |
382 |
Thread.sleep(SHORT_DELAY_MS); |
383 |
lock.writeLock().unlock(); |
384 |
t1.join(MEDIUM_DELAY_MS); |
385 |
t2.join(MEDIUM_DELAY_MS); |
386 |
assertTrue(!t1.isAlive()); |
387 |
assertTrue(!t2.isAlive()); |
388 |
|
389 |
} catch(Exception e){ |
390 |
unexpectedException(); |
391 |
} |
392 |
} |
393 |
|
394 |
/** |
395 |
* Read trylock succeeds if write locked by current thread |
396 |
*/ |
397 |
public void testReadHoldingWriteLock() { |
398 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
399 |
lock.writeLock().lock(); |
400 |
assertTrue(lock.readLock().tryLock()); |
401 |
lock.readLock().unlock(); |
402 |
lock.writeLock().unlock(); |
403 |
} |
404 |
|
405 |
/** |
406 |
* Read lock succeeds if write locked by current thread even if |
407 |
* other threads are waiting for readlock |
408 |
*/ |
409 |
public void testReadHoldingWriteLock2() { |
410 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
411 |
lock.writeLock().lock(); |
412 |
Thread t1 = new Thread(new Runnable() { |
413 |
public void run() { |
414 |
lock.readLock().lock(); |
415 |
lock.readLock().unlock(); |
416 |
} |
417 |
}); |
418 |
Thread t2 = new Thread(new Runnable() { |
419 |
public void run() { |
420 |
lock.readLock().lock(); |
421 |
lock.readLock().unlock(); |
422 |
} |
423 |
}); |
424 |
|
425 |
try { |
426 |
t1.start(); |
427 |
t2.start(); |
428 |
lock.readLock().lock(); |
429 |
lock.readLock().unlock(); |
430 |
Thread.sleep(SHORT_DELAY_MS); |
431 |
lock.readLock().lock(); |
432 |
lock.readLock().unlock(); |
433 |
lock.writeLock().unlock(); |
434 |
t1.join(MEDIUM_DELAY_MS); |
435 |
t2.join(MEDIUM_DELAY_MS); |
436 |
assertTrue(!t1.isAlive()); |
437 |
assertTrue(!t2.isAlive()); |
438 |
|
439 |
} catch(Exception e){ |
440 |
unexpectedException(); |
441 |
} |
442 |
} |
443 |
|
444 |
/** |
445 |
* Read lock succeeds if write locked by current thread even if |
446 |
* other threads are waiting for writelock |
447 |
*/ |
448 |
public void testReadHoldingWriteLock3() { |
449 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
450 |
lock.writeLock().lock(); |
451 |
Thread t1 = new Thread(new Runnable() { |
452 |
public void run() { |
453 |
lock.writeLock().lock(); |
454 |
lock.writeLock().unlock(); |
455 |
} |
456 |
}); |
457 |
Thread t2 = new Thread(new Runnable() { |
458 |
public void run() { |
459 |
lock.writeLock().lock(); |
460 |
lock.writeLock().unlock(); |
461 |
} |
462 |
}); |
463 |
|
464 |
try { |
465 |
t1.start(); |
466 |
t2.start(); |
467 |
lock.readLock().lock(); |
468 |
lock.readLock().unlock(); |
469 |
Thread.sleep(SHORT_DELAY_MS); |
470 |
lock.readLock().lock(); |
471 |
lock.readLock().unlock(); |
472 |
lock.writeLock().unlock(); |
473 |
t1.join(MEDIUM_DELAY_MS); |
474 |
t2.join(MEDIUM_DELAY_MS); |
475 |
assertTrue(!t1.isAlive()); |
476 |
assertTrue(!t2.isAlive()); |
477 |
|
478 |
} catch(Exception e){ |
479 |
unexpectedException(); |
480 |
} |
481 |
} |
482 |
|
483 |
|
484 |
/** |
485 |
* Write lock succeeds if write locked by current thread even if |
486 |
* other threads are waiting for writelock |
487 |
*/ |
488 |
public void testWriteHoldingWriteLock4() { |
489 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
490 |
lock.writeLock().lock(); |
491 |
Thread t1 = new Thread(new Runnable() { |
492 |
public void run() { |
493 |
lock.writeLock().lock(); |
494 |
lock.writeLock().unlock(); |
495 |
} |
496 |
}); |
497 |
Thread t2 = new Thread(new Runnable() { |
498 |
public void run() { |
499 |
lock.writeLock().lock(); |
500 |
lock.writeLock().unlock(); |
501 |
} |
502 |
}); |
503 |
|
504 |
try { |
505 |
t1.start(); |
506 |
t2.start(); |
507 |
lock.writeLock().lock(); |
508 |
lock.writeLock().unlock(); |
509 |
Thread.sleep(SHORT_DELAY_MS); |
510 |
lock.writeLock().lock(); |
511 |
lock.writeLock().unlock(); |
512 |
lock.writeLock().unlock(); |
513 |
t1.join(MEDIUM_DELAY_MS); |
514 |
t2.join(MEDIUM_DELAY_MS); |
515 |
assertTrue(!t1.isAlive()); |
516 |
assertTrue(!t2.isAlive()); |
517 |
|
518 |
} catch(Exception e){ |
519 |
unexpectedException(); |
520 |
} |
521 |
} |
522 |
|
523 |
|
524 |
/** |
525 |
* Fair Read trylock succeeds if write locked by current thread |
526 |
*/ |
527 |
public void testReadHoldingWriteLockFair() { |
528 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
529 |
lock.writeLock().lock(); |
530 |
assertTrue(lock.readLock().tryLock()); |
531 |
lock.readLock().unlock(); |
532 |
lock.writeLock().unlock(); |
533 |
} |
534 |
|
535 |
/** |
536 |
* Fair Read lock succeeds if write locked by current thread even if |
537 |
* other threads are waiting for readlock |
538 |
*/ |
539 |
public void testReadHoldingWriteLockFair2() { |
540 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
541 |
lock.writeLock().lock(); |
542 |
Thread t1 = new Thread(new Runnable() { |
543 |
public void run() { |
544 |
lock.readLock().lock(); |
545 |
lock.readLock().unlock(); |
546 |
} |
547 |
}); |
548 |
Thread t2 = new Thread(new Runnable() { |
549 |
public void run() { |
550 |
lock.readLock().lock(); |
551 |
lock.readLock().unlock(); |
552 |
} |
553 |
}); |
554 |
|
555 |
try { |
556 |
t1.start(); |
557 |
t2.start(); |
558 |
lock.readLock().lock(); |
559 |
lock.readLock().unlock(); |
560 |
Thread.sleep(SHORT_DELAY_MS); |
561 |
lock.readLock().lock(); |
562 |
lock.readLock().unlock(); |
563 |
lock.writeLock().unlock(); |
564 |
t1.join(MEDIUM_DELAY_MS); |
565 |
t2.join(MEDIUM_DELAY_MS); |
566 |
assertTrue(!t1.isAlive()); |
567 |
assertTrue(!t2.isAlive()); |
568 |
|
569 |
} catch(Exception e){ |
570 |
unexpectedException(); |
571 |
} |
572 |
} |
573 |
|
574 |
|
575 |
/** |
576 |
* Fair Read lock succeeds if write locked by current thread even if |
577 |
* other threads are waiting for writelock |
578 |
*/ |
579 |
public void testReadHoldingWriteLockFair3() { |
580 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
581 |
lock.writeLock().lock(); |
582 |
Thread t1 = new Thread(new Runnable() { |
583 |
public void run() { |
584 |
lock.writeLock().lock(); |
585 |
lock.writeLock().unlock(); |
586 |
} |
587 |
}); |
588 |
Thread t2 = new Thread(new Runnable() { |
589 |
public void run() { |
590 |
lock.writeLock().lock(); |
591 |
lock.writeLock().unlock(); |
592 |
} |
593 |
}); |
594 |
|
595 |
try { |
596 |
t1.start(); |
597 |
t2.start(); |
598 |
lock.readLock().lock(); |
599 |
lock.readLock().unlock(); |
600 |
Thread.sleep(SHORT_DELAY_MS); |
601 |
lock.readLock().lock(); |
602 |
lock.readLock().unlock(); |
603 |
lock.writeLock().unlock(); |
604 |
t1.join(MEDIUM_DELAY_MS); |
605 |
t2.join(MEDIUM_DELAY_MS); |
606 |
assertTrue(!t1.isAlive()); |
607 |
assertTrue(!t2.isAlive()); |
608 |
|
609 |
} catch(Exception e){ |
610 |
unexpectedException(); |
611 |
} |
612 |
} |
613 |
|
614 |
|
615 |
/** |
616 |
* Fair Write lock succeeds if write locked by current thread even if |
617 |
* other threads are waiting for writelock |
618 |
*/ |
619 |
public void testWriteHoldingWriteLockFair4() { |
620 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
621 |
lock.writeLock().lock(); |
622 |
Thread t1 = new Thread(new Runnable() { |
623 |
public void run() { |
624 |
lock.writeLock().lock(); |
625 |
lock.writeLock().unlock(); |
626 |
} |
627 |
}); |
628 |
Thread t2 = new Thread(new Runnable() { |
629 |
public void run() { |
630 |
lock.writeLock().lock(); |
631 |
lock.writeLock().unlock(); |
632 |
} |
633 |
}); |
634 |
|
635 |
try { |
636 |
t1.start(); |
637 |
t2.start(); |
638 |
Thread.sleep(SHORT_DELAY_MS); |
639 |
assertTrue(lock.isWriteLockedByCurrentThread()); |
640 |
assertTrue(lock.getWriteHoldCount() == 1); |
641 |
lock.writeLock().lock(); |
642 |
assertTrue(lock.getWriteHoldCount() == 2); |
643 |
lock.writeLock().unlock(); |
644 |
lock.writeLock().lock(); |
645 |
lock.writeLock().unlock(); |
646 |
lock.writeLock().unlock(); |
647 |
t1.join(MEDIUM_DELAY_MS); |
648 |
t2.join(MEDIUM_DELAY_MS); |
649 |
assertTrue(!t1.isAlive()); |
650 |
assertTrue(!t2.isAlive()); |
651 |
|
652 |
} catch(Exception e){ |
653 |
unexpectedException(); |
654 |
} |
655 |
} |
656 |
|
657 |
|
658 |
/** |
659 |
* Read tryLock succeeds if readlocked but not writelocked |
660 |
*/ |
661 |
public void testTryLockWhenReadLocked() { |
662 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
663 |
lock.readLock().lock(); |
664 |
Thread t = new Thread(new Runnable() { |
665 |
public void run() { |
666 |
threadAssertTrue(lock.readLock().tryLock()); |
667 |
lock.readLock().unlock(); |
668 |
} |
669 |
}); |
670 |
try { |
671 |
t.start(); |
672 |
t.join(); |
673 |
lock.readLock().unlock(); |
674 |
} catch(Exception e){ |
675 |
unexpectedException(); |
676 |
} |
677 |
} |
678 |
|
679 |
|
680 |
|
681 |
/** |
682 |
* write tryLock fails when readlocked |
683 |
*/ |
684 |
public void testWriteTryLockWhenReadLocked() { |
685 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
686 |
lock.readLock().lock(); |
687 |
Thread t = new Thread(new Runnable() { |
688 |
public void run() { |
689 |
threadAssertFalse(lock.writeLock().tryLock()); |
690 |
} |
691 |
}); |
692 |
try { |
693 |
t.start(); |
694 |
t.join(); |
695 |
lock.readLock().unlock(); |
696 |
} catch(Exception e){ |
697 |
unexpectedException(); |
698 |
} |
699 |
} |
700 |
|
701 |
|
702 |
|
703 |
/** |
704 |
* write timed tryLock times out if locked |
705 |
*/ |
706 |
public void testWriteTryLock_Timeout() { |
707 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
708 |
lock.writeLock().lock(); |
709 |
Thread t = new Thread(new Runnable() { |
710 |
public void run() { |
711 |
try { |
712 |
threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS)); |
713 |
} catch (Exception ex) { |
714 |
threadUnexpectedException(); |
715 |
} |
716 |
} |
717 |
}); |
718 |
try { |
719 |
t.start(); |
720 |
t.join(); |
721 |
lock.writeLock().unlock(); |
722 |
} catch(Exception e){ |
723 |
unexpectedException(); |
724 |
} |
725 |
} |
726 |
|
727 |
/** |
728 |
* read timed tryLock times out if write-locked |
729 |
*/ |
730 |
public void testReadTryLock_Timeout() { |
731 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
732 |
lock.writeLock().lock(); |
733 |
Thread t = new Thread(new Runnable() { |
734 |
public void run() { |
735 |
try { |
736 |
threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS)); |
737 |
} catch (Exception ex) { |
738 |
threadUnexpectedException(); |
739 |
} |
740 |
} |
741 |
}); |
742 |
try { |
743 |
t.start(); |
744 |
t.join(); |
745 |
lock.writeLock().unlock(); |
746 |
} catch(Exception e){ |
747 |
unexpectedException(); |
748 |
} |
749 |
} |
750 |
|
751 |
|
752 |
/** |
753 |
* write lockInterruptibly succeeds if lock free else is interruptible |
754 |
*/ |
755 |
public void testWriteLockInterruptibly() { |
756 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
757 |
try { |
758 |
lock.writeLock().lockInterruptibly(); |
759 |
} catch(Exception e) { |
760 |
unexpectedException(); |
761 |
} |
762 |
Thread t = new Thread(new Runnable() { |
763 |
public void run() { |
764 |
try { |
765 |
lock.writeLock().lockInterruptibly(); |
766 |
threadShouldThrow(); |
767 |
} |
768 |
catch(InterruptedException success) { |
769 |
} |
770 |
} |
771 |
}); |
772 |
try { |
773 |
t.start(); |
774 |
t.interrupt(); |
775 |
t.join(); |
776 |
lock.writeLock().unlock(); |
777 |
} catch(Exception e){ |
778 |
unexpectedException(); |
779 |
} |
780 |
} |
781 |
|
782 |
/** |
783 |
* read lockInterruptibly succeeds if lock free else is interruptible |
784 |
*/ |
785 |
public void testReadLockInterruptibly() { |
786 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
787 |
try { |
788 |
lock.writeLock().lockInterruptibly(); |
789 |
} catch(Exception e) { |
790 |
unexpectedException(); |
791 |
} |
792 |
Thread t = new Thread(new Runnable() { |
793 |
public void run() { |
794 |
try { |
795 |
lock.readLock().lockInterruptibly(); |
796 |
threadShouldThrow(); |
797 |
} |
798 |
catch(InterruptedException success) { |
799 |
} |
800 |
} |
801 |
}); |
802 |
try { |
803 |
t.start(); |
804 |
t.interrupt(); |
805 |
t.join(); |
806 |
lock.writeLock().unlock(); |
807 |
} catch(Exception e){ |
808 |
unexpectedException(); |
809 |
} |
810 |
} |
811 |
|
812 |
/** |
813 |
* Calling await without holding lock throws IllegalMonitorStateException |
814 |
*/ |
815 |
public void testAwait_IllegalMonitor() { |
816 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
817 |
final Condition c = lock.writeLock().newCondition(); |
818 |
try { |
819 |
c.await(); |
820 |
shouldThrow(); |
821 |
} |
822 |
catch (IllegalMonitorStateException success) { |
823 |
} |
824 |
catch (Exception ex) { |
825 |
shouldThrow(); |
826 |
} |
827 |
} |
828 |
|
829 |
/** |
830 |
* Calling signal without holding lock throws IllegalMonitorStateException |
831 |
*/ |
832 |
public void testSignal_IllegalMonitor() { |
833 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
834 |
final Condition c = lock.writeLock().newCondition(); |
835 |
try { |
836 |
c.signal(); |
837 |
shouldThrow(); |
838 |
} |
839 |
catch (IllegalMonitorStateException success) { |
840 |
} |
841 |
catch (Exception ex) { |
842 |
unexpectedException(); |
843 |
} |
844 |
} |
845 |
|
846 |
/** |
847 |
* awaitNanos without a signal times out |
848 |
*/ |
849 |
public void testAwaitNanos_Timeout() { |
850 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
851 |
final Condition c = lock.writeLock().newCondition(); |
852 |
try { |
853 |
lock.writeLock().lock(); |
854 |
long t = c.awaitNanos(100); |
855 |
assertTrue(t <= 0); |
856 |
lock.writeLock().unlock(); |
857 |
} |
858 |
catch (Exception ex) { |
859 |
unexpectedException(); |
860 |
} |
861 |
} |
862 |
|
863 |
|
864 |
/** |
865 |
* timed await without a signal times out |
866 |
*/ |
867 |
public void testAwait_Timeout() { |
868 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
869 |
final Condition c = lock.writeLock().newCondition(); |
870 |
try { |
871 |
lock.writeLock().lock(); |
872 |
lock.writeLock().unlock(); |
873 |
} |
874 |
catch (Exception ex) { |
875 |
unexpectedException(); |
876 |
} |
877 |
} |
878 |
|
879 |
/** |
880 |
* awaitUntil without a signal times out |
881 |
*/ |
882 |
public void testAwaitUntil_Timeout() { |
883 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
884 |
final Condition c = lock.writeLock().newCondition(); |
885 |
try { |
886 |
lock.writeLock().lock(); |
887 |
java.util.Date d = new java.util.Date(); |
888 |
lock.writeLock().unlock(); |
889 |
} |
890 |
catch (Exception ex) { |
891 |
unexpectedException(); |
892 |
} |
893 |
} |
894 |
|
895 |
/** |
896 |
* await returns when signalled |
897 |
*/ |
898 |
public void testAwait() { |
899 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
900 |
final Condition c = lock.writeLock().newCondition(); |
901 |
Thread t = new Thread(new Runnable() { |
902 |
public void run() { |
903 |
try { |
904 |
lock.writeLock().lock(); |
905 |
c.await(); |
906 |
lock.writeLock().unlock(); |
907 |
} |
908 |
catch(InterruptedException e) { |
909 |
threadUnexpectedException(); |
910 |
} |
911 |
} |
912 |
}); |
913 |
|
914 |
try { |
915 |
t.start(); |
916 |
Thread.sleep(SHORT_DELAY_MS); |
917 |
lock.writeLock().lock(); |
918 |
c.signal(); |
919 |
lock.writeLock().unlock(); |
920 |
t.join(SHORT_DELAY_MS); |
921 |
assertFalse(t.isAlive()); |
922 |
} |
923 |
catch (Exception ex) { |
924 |
unexpectedException(); |
925 |
} |
926 |
} |
927 |
|
928 |
/** A helper class for uninterruptible wait tests */ |
929 |
class UninterruptableThread extends Thread { |
930 |
private Lock lock; |
931 |
private Condition c; |
932 |
|
933 |
public volatile boolean canAwake = false; |
934 |
public volatile boolean interrupted = false; |
935 |
public volatile boolean lockStarted = false; |
936 |
|
937 |
public UninterruptableThread(Lock lock, Condition c) { |
938 |
this.lock = lock; |
939 |
this.c = c; |
940 |
} |
941 |
|
942 |
public synchronized void run() { |
943 |
lock.lock(); |
944 |
lockStarted = true; |
945 |
|
946 |
while (!canAwake) { |
947 |
c.awaitUninterruptibly(); |
948 |
} |
949 |
|
950 |
interrupted = isInterrupted(); |
951 |
lock.unlock(); |
952 |
} |
953 |
} |
954 |
|
955 |
/** |
956 |
* awaitUninterruptibly doesn't abort on interrupt |
957 |
*/ |
958 |
public void testAwaitUninterruptibly() { |
959 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
960 |
final Condition c = lock.writeLock().newCondition(); |
961 |
UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c); |
962 |
|
963 |
try { |
964 |
thread.start(); |
965 |
|
966 |
while (!thread.lockStarted) { |
967 |
Thread.sleep(100); |
968 |
} |
969 |
|
970 |
lock.writeLock().lock(); |
971 |
try { |
972 |
thread.interrupt(); |
973 |
thread.canAwake = true; |
974 |
c.signal(); |
975 |
} finally { |
976 |
lock.writeLock().unlock(); |
977 |
} |
978 |
|
979 |
thread.join(); |
980 |
assertTrue(thread.interrupted); |
981 |
assertFalse(thread.isAlive()); |
982 |
} catch (Exception ex) { |
983 |
unexpectedException(); |
984 |
} |
985 |
} |
986 |
|
987 |
/** |
988 |
* await is interruptible |
989 |
*/ |
990 |
public void testAwait_Interrupt() { |
991 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
992 |
final Condition c = lock.writeLock().newCondition(); |
993 |
Thread t = new Thread(new Runnable() { |
994 |
public void run() { |
995 |
try { |
996 |
lock.writeLock().lock(); |
997 |
c.await(); |
998 |
lock.writeLock().unlock(); |
999 |
threadShouldThrow(); |
1000 |
} |
1001 |
catch(InterruptedException success) { |
1002 |
} |
1003 |
} |
1004 |
}); |
1005 |
|
1006 |
try { |
1007 |
t.start(); |
1008 |
Thread.sleep(SHORT_DELAY_MS); |
1009 |
t.interrupt(); |
1010 |
t.join(SHORT_DELAY_MS); |
1011 |
assertFalse(t.isAlive()); |
1012 |
} |
1013 |
catch (Exception ex) { |
1014 |
unexpectedException(); |
1015 |
} |
1016 |
} |
1017 |
|
1018 |
/** |
1019 |
* awaitNanos is interruptible |
1020 |
*/ |
1021 |
public void testAwaitNanos_Interrupt() { |
1022 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1023 |
final Condition c = lock.writeLock().newCondition(); |
1024 |
Thread t = new Thread(new Runnable() { |
1025 |
public void run() { |
1026 |
try { |
1027 |
lock.writeLock().lock(); |
1028 |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
1029 |
lock.writeLock().unlock(); |
1030 |
threadShouldThrow(); |
1031 |
} |
1032 |
catch(InterruptedException success) { |
1033 |
} |
1034 |
} |
1035 |
}); |
1036 |
|
1037 |
try { |
1038 |
t.start(); |
1039 |
Thread.sleep(SHORT_DELAY_MS); |
1040 |
t.interrupt(); |
1041 |
t.join(SHORT_DELAY_MS); |
1042 |
assertFalse(t.isAlive()); |
1043 |
} |
1044 |
catch (Exception ex) { |
1045 |
unexpectedException(); |
1046 |
} |
1047 |
} |
1048 |
|
1049 |
/** |
1050 |
* awaitUntil is interruptible |
1051 |
*/ |
1052 |
public void testAwaitUntil_Interrupt() { |
1053 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1054 |
final Condition c = lock.writeLock().newCondition(); |
1055 |
Thread t = new Thread(new Runnable() { |
1056 |
public void run() { |
1057 |
try { |
1058 |
lock.writeLock().lock(); |
1059 |
java.util.Date d = new java.util.Date(); |
1060 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
1061 |
lock.writeLock().unlock(); |
1062 |
threadShouldThrow(); |
1063 |
} |
1064 |
catch(InterruptedException success) { |
1065 |
} |
1066 |
} |
1067 |
}); |
1068 |
|
1069 |
try { |
1070 |
t.start(); |
1071 |
Thread.sleep(SHORT_DELAY_MS); |
1072 |
t.interrupt(); |
1073 |
t.join(SHORT_DELAY_MS); |
1074 |
assertFalse(t.isAlive()); |
1075 |
} |
1076 |
catch (Exception ex) { |
1077 |
unexpectedException(); |
1078 |
} |
1079 |
} |
1080 |
|
1081 |
/** |
1082 |
* signalAll wakes up all threads |
1083 |
*/ |
1084 |
public void testSignalAll() { |
1085 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1086 |
final Condition c = lock.writeLock().newCondition(); |
1087 |
Thread t1 = new Thread(new Runnable() { |
1088 |
public void run() { |
1089 |
try { |
1090 |
lock.writeLock().lock(); |
1091 |
c.await(); |
1092 |
lock.writeLock().unlock(); |
1093 |
} |
1094 |
catch(InterruptedException e) { |
1095 |
threadUnexpectedException(); |
1096 |
} |
1097 |
} |
1098 |
}); |
1099 |
|
1100 |
Thread t2 = new Thread(new Runnable() { |
1101 |
public void run() { |
1102 |
try { |
1103 |
lock.writeLock().lock(); |
1104 |
c.await(); |
1105 |
lock.writeLock().unlock(); |
1106 |
} |
1107 |
catch(InterruptedException e) { |
1108 |
threadUnexpectedException(); |
1109 |
} |
1110 |
} |
1111 |
}); |
1112 |
|
1113 |
try { |
1114 |
t1.start(); |
1115 |
t2.start(); |
1116 |
Thread.sleep(SHORT_DELAY_MS); |
1117 |
lock.writeLock().lock(); |
1118 |
c.signalAll(); |
1119 |
lock.writeLock().unlock(); |
1120 |
t1.join(SHORT_DELAY_MS); |
1121 |
t2.join(SHORT_DELAY_MS); |
1122 |
assertFalse(t1.isAlive()); |
1123 |
assertFalse(t2.isAlive()); |
1124 |
} |
1125 |
catch (Exception ex) { |
1126 |
unexpectedException(); |
1127 |
} |
1128 |
} |
1129 |
|
1130 |
/** |
1131 |
* A serialized lock deserializes as unlocked |
1132 |
*/ |
1133 |
public void testSerialization() { |
1134 |
ReentrantReadWriteLock l = new ReentrantReadWriteLock(); |
1135 |
l.readLock().lock(); |
1136 |
l.readLock().unlock(); |
1137 |
|
1138 |
try { |
1139 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
1140 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
1141 |
out.writeObject(l); |
1142 |
out.close(); |
1143 |
|
1144 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
1145 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
1146 |
ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject(); |
1147 |
r.readLock().lock(); |
1148 |
r.readLock().unlock(); |
1149 |
} catch(Exception e){ |
1150 |
e.printStackTrace(); |
1151 |
unexpectedException(); |
1152 |
} |
1153 |
} |
1154 |
|
1155 |
/** |
1156 |
* hasQueuedThreads reports whether there are waiting threads |
1157 |
*/ |
1158 |
public void testhasQueuedThreads() { |
1159 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1160 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1161 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1162 |
try { |
1163 |
assertFalse(lock.hasQueuedThreads()); |
1164 |
lock.writeLock().lock(); |
1165 |
t1.start(); |
1166 |
Thread.sleep(SHORT_DELAY_MS); |
1167 |
assertTrue(lock.hasQueuedThreads()); |
1168 |
t2.start(); |
1169 |
Thread.sleep(SHORT_DELAY_MS); |
1170 |
assertTrue(lock.hasQueuedThreads()); |
1171 |
t1.interrupt(); |
1172 |
Thread.sleep(SHORT_DELAY_MS); |
1173 |
assertTrue(lock.hasQueuedThreads()); |
1174 |
lock.writeLock().unlock(); |
1175 |
Thread.sleep(SHORT_DELAY_MS); |
1176 |
assertFalse(lock.hasQueuedThreads()); |
1177 |
t1.join(); |
1178 |
t2.join(); |
1179 |
} catch(Exception e){ |
1180 |
unexpectedException(); |
1181 |
} |
1182 |
} |
1183 |
|
1184 |
/** |
1185 |
* hasQueuedThread(null) throws NPE |
1186 |
*/ |
1187 |
public void testHasQueuedThreadNPE() { |
1188 |
final ReentrantReadWriteLock sync = new ReentrantReadWriteLock(); |
1189 |
try { |
1190 |
sync.hasQueuedThread(null); |
1191 |
shouldThrow(); |
1192 |
} catch (NullPointerException success) { |
1193 |
} |
1194 |
} |
1195 |
|
1196 |
/** |
1197 |
* hasQueuedThread reports whether a thread is queued. |
1198 |
*/ |
1199 |
public void testHasQueuedThread() { |
1200 |
final ReentrantReadWriteLock sync = new ReentrantReadWriteLock(); |
1201 |
Thread t1 = new Thread(new InterruptedLockRunnable(sync)); |
1202 |
Thread t2 = new Thread(new InterruptibleLockRunnable(sync)); |
1203 |
try { |
1204 |
assertFalse(sync.hasQueuedThread(t1)); |
1205 |
assertFalse(sync.hasQueuedThread(t2)); |
1206 |
sync.writeLock().lock(); |
1207 |
t1.start(); |
1208 |
Thread.sleep(SHORT_DELAY_MS); |
1209 |
assertTrue(sync.hasQueuedThread(t1)); |
1210 |
t2.start(); |
1211 |
Thread.sleep(SHORT_DELAY_MS); |
1212 |
assertTrue(sync.hasQueuedThread(t1)); |
1213 |
assertTrue(sync.hasQueuedThread(t2)); |
1214 |
t1.interrupt(); |
1215 |
Thread.sleep(SHORT_DELAY_MS); |
1216 |
assertFalse(sync.hasQueuedThread(t1)); |
1217 |
assertTrue(sync.hasQueuedThread(t2)); |
1218 |
sync.writeLock().unlock(); |
1219 |
Thread.sleep(SHORT_DELAY_MS); |
1220 |
assertFalse(sync.hasQueuedThread(t1)); |
1221 |
Thread.sleep(SHORT_DELAY_MS); |
1222 |
assertFalse(sync.hasQueuedThread(t2)); |
1223 |
t1.join(); |
1224 |
t2.join(); |
1225 |
} catch(Exception e){ |
1226 |
unexpectedException(); |
1227 |
} |
1228 |
} |
1229 |
|
1230 |
|
1231 |
/** |
1232 |
* getQueueLength reports number of waiting threads |
1233 |
*/ |
1234 |
public void testGetQueueLength() { |
1235 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1236 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1237 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1238 |
try { |
1239 |
assertEquals(0, lock.getQueueLength()); |
1240 |
lock.writeLock().lock(); |
1241 |
t1.start(); |
1242 |
Thread.sleep(SHORT_DELAY_MS); |
1243 |
assertEquals(1, lock.getQueueLength()); |
1244 |
t2.start(); |
1245 |
Thread.sleep(SHORT_DELAY_MS); |
1246 |
assertEquals(2, lock.getQueueLength()); |
1247 |
t1.interrupt(); |
1248 |
Thread.sleep(SHORT_DELAY_MS); |
1249 |
assertEquals(1, lock.getQueueLength()); |
1250 |
lock.writeLock().unlock(); |
1251 |
Thread.sleep(SHORT_DELAY_MS); |
1252 |
assertEquals(0, lock.getQueueLength()); |
1253 |
t1.join(); |
1254 |
t2.join(); |
1255 |
} catch(Exception e){ |
1256 |
unexpectedException(); |
1257 |
} |
1258 |
} |
1259 |
|
1260 |
/** |
1261 |
* getQueuedThreads includes waiting threads |
1262 |
*/ |
1263 |
public void testGetQueuedThreads() { |
1264 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1265 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1266 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1267 |
try { |
1268 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1269 |
lock.writeLock().lock(); |
1270 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1271 |
t1.start(); |
1272 |
Thread.sleep(SHORT_DELAY_MS); |
1273 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
1274 |
t2.start(); |
1275 |
Thread.sleep(SHORT_DELAY_MS); |
1276 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
1277 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
1278 |
t1.interrupt(); |
1279 |
Thread.sleep(SHORT_DELAY_MS); |
1280 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
1281 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
1282 |
lock.writeLock().unlock(); |
1283 |
Thread.sleep(SHORT_DELAY_MS); |
1284 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1285 |
t1.join(); |
1286 |
t2.join(); |
1287 |
} catch(Exception e){ |
1288 |
unexpectedException(); |
1289 |
} |
1290 |
} |
1291 |
|
1292 |
/** |
1293 |
* hasWaiters throws NPE if null |
1294 |
*/ |
1295 |
public void testHasWaitersNPE() { |
1296 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1297 |
try { |
1298 |
lock.hasWaiters(null); |
1299 |
shouldThrow(); |
1300 |
} catch (NullPointerException success) { |
1301 |
} catch (Exception ex) { |
1302 |
unexpectedException(); |
1303 |
} |
1304 |
} |
1305 |
|
1306 |
/** |
1307 |
* getWaitQueueLength throws NPE if null |
1308 |
*/ |
1309 |
public void testGetWaitQueueLengthNPE() { |
1310 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1311 |
try { |
1312 |
lock.getWaitQueueLength(null); |
1313 |
shouldThrow(); |
1314 |
} catch (NullPointerException success) { |
1315 |
} catch (Exception ex) { |
1316 |
unexpectedException(); |
1317 |
} |
1318 |
} |
1319 |
|
1320 |
|
1321 |
/** |
1322 |
* getWaitingThreads throws NPE if null |
1323 |
*/ |
1324 |
public void testGetWaitingThreadsNPE() { |
1325 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1326 |
try { |
1327 |
lock.getWaitingThreads(null); |
1328 |
shouldThrow(); |
1329 |
} catch (NullPointerException success) { |
1330 |
} catch (Exception ex) { |
1331 |
unexpectedException(); |
1332 |
} |
1333 |
} |
1334 |
|
1335 |
/** |
1336 |
* hasWaiters throws IAE if not owned |
1337 |
*/ |
1338 |
public void testHasWaitersIAE() { |
1339 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1340 |
final Condition c = (lock.writeLock().newCondition()); |
1341 |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(); |
1342 |
try { |
1343 |
lock2.hasWaiters(c); |
1344 |
shouldThrow(); |
1345 |
} catch (IllegalArgumentException success) { |
1346 |
} catch (Exception ex) { |
1347 |
unexpectedException(); |
1348 |
} |
1349 |
} |
1350 |
|
1351 |
/** |
1352 |
* hasWaiters throws IMSE if not locked |
1353 |
*/ |
1354 |
public void testHasWaitersIMSE() { |
1355 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1356 |
final Condition c = (lock.writeLock().newCondition()); |
1357 |
try { |
1358 |
lock.hasWaiters(c); |
1359 |
shouldThrow(); |
1360 |
} catch (IllegalMonitorStateException success) { |
1361 |
} catch (Exception ex) { |
1362 |
unexpectedException(); |
1363 |
} |
1364 |
} |
1365 |
|
1366 |
|
1367 |
/** |
1368 |
* getWaitQueueLength throws IAE if not owned |
1369 |
*/ |
1370 |
public void testGetWaitQueueLengthIAE() { |
1371 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1372 |
final Condition c = (lock.writeLock().newCondition()); |
1373 |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(); |
1374 |
try { |
1375 |
lock2.getWaitQueueLength(c); |
1376 |
shouldThrow(); |
1377 |
} catch (IllegalArgumentException success) { |
1378 |
} catch (Exception ex) { |
1379 |
unexpectedException(); |
1380 |
} |
1381 |
} |
1382 |
|
1383 |
/** |
1384 |
* getWaitQueueLength throws IMSE if not locked |
1385 |
*/ |
1386 |
public void testGetWaitQueueLengthIMSE() { |
1387 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1388 |
final Condition c = (lock.writeLock().newCondition()); |
1389 |
try { |
1390 |
lock.getWaitQueueLength(c); |
1391 |
shouldThrow(); |
1392 |
} catch (IllegalMonitorStateException success) { |
1393 |
} catch (Exception ex) { |
1394 |
unexpectedException(); |
1395 |
} |
1396 |
} |
1397 |
|
1398 |
|
1399 |
/** |
1400 |
* getWaitingThreads throws IAE if not owned |
1401 |
*/ |
1402 |
public void testGetWaitingThreadsIAE() { |
1403 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1404 |
final Condition c = (lock.writeLock().newCondition()); |
1405 |
final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock(); |
1406 |
try { |
1407 |
lock2.getWaitingThreads(c); |
1408 |
shouldThrow(); |
1409 |
} catch (IllegalArgumentException success) { |
1410 |
} catch (Exception ex) { |
1411 |
unexpectedException(); |
1412 |
} |
1413 |
} |
1414 |
|
1415 |
/** |
1416 |
* getWaitingThreads throws IMSE if not locked |
1417 |
*/ |
1418 |
public void testGetWaitingThreadsIMSE() { |
1419 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1420 |
final Condition c = (lock.writeLock().newCondition()); |
1421 |
try { |
1422 |
lock.getWaitingThreads(c); |
1423 |
shouldThrow(); |
1424 |
} catch (IllegalMonitorStateException success) { |
1425 |
} catch (Exception ex) { |
1426 |
unexpectedException(); |
1427 |
} |
1428 |
} |
1429 |
|
1430 |
|
1431 |
/** |
1432 |
* hasWaiters returns true when a thread is waiting, else false |
1433 |
*/ |
1434 |
public void testHasWaiters() { |
1435 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1436 |
final Condition c = (lock.writeLock().newCondition()); |
1437 |
Thread t = new Thread(new Runnable() { |
1438 |
public void run() { |
1439 |
try { |
1440 |
lock.writeLock().lock(); |
1441 |
threadAssertFalse(lock.hasWaiters(c)); |
1442 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
1443 |
c.await(); |
1444 |
lock.writeLock().unlock(); |
1445 |
} |
1446 |
catch(InterruptedException e) { |
1447 |
threadUnexpectedException(); |
1448 |
} |
1449 |
} |
1450 |
}); |
1451 |
|
1452 |
try { |
1453 |
t.start(); |
1454 |
Thread.sleep(SHORT_DELAY_MS); |
1455 |
lock.writeLock().lock(); |
1456 |
assertTrue(lock.hasWaiters(c)); |
1457 |
assertEquals(1, lock.getWaitQueueLength(c)); |
1458 |
c.signal(); |
1459 |
lock.writeLock().unlock(); |
1460 |
Thread.sleep(SHORT_DELAY_MS); |
1461 |
lock.writeLock().lock(); |
1462 |
assertFalse(lock.hasWaiters(c)); |
1463 |
assertEquals(0, lock.getWaitQueueLength(c)); |
1464 |
lock.writeLock().unlock(); |
1465 |
t.join(SHORT_DELAY_MS); |
1466 |
assertFalse(t.isAlive()); |
1467 |
} |
1468 |
catch (Exception ex) { |
1469 |
unexpectedException(); |
1470 |
} |
1471 |
} |
1472 |
|
1473 |
/** |
1474 |
* getWaitQueueLength returns number of waiting threads |
1475 |
*/ |
1476 |
public void testGetWaitQueueLength() { |
1477 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1478 |
final Condition c = (lock.writeLock().newCondition()); |
1479 |
Thread t = new Thread(new Runnable() { |
1480 |
public void run() { |
1481 |
try { |
1482 |
lock.writeLock().lock(); |
1483 |
threadAssertFalse(lock.hasWaiters(c)); |
1484 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
1485 |
c.await(); |
1486 |
lock.writeLock().unlock(); |
1487 |
} |
1488 |
catch(InterruptedException e) { |
1489 |
threadUnexpectedException(); |
1490 |
} |
1491 |
} |
1492 |
}); |
1493 |
|
1494 |
try { |
1495 |
t.start(); |
1496 |
Thread.sleep(SHORT_DELAY_MS); |
1497 |
lock.writeLock().lock(); |
1498 |
assertTrue(lock.hasWaiters(c)); |
1499 |
assertEquals(1, lock.getWaitQueueLength(c)); |
1500 |
c.signal(); |
1501 |
lock.writeLock().unlock(); |
1502 |
Thread.sleep(SHORT_DELAY_MS); |
1503 |
lock.writeLock().lock(); |
1504 |
assertFalse(lock.hasWaiters(c)); |
1505 |
assertEquals(0, lock.getWaitQueueLength(c)); |
1506 |
lock.writeLock().unlock(); |
1507 |
t.join(SHORT_DELAY_MS); |
1508 |
assertFalse(t.isAlive()); |
1509 |
} |
1510 |
catch (Exception ex) { |
1511 |
unexpectedException(); |
1512 |
} |
1513 |
} |
1514 |
|
1515 |
|
1516 |
/** |
1517 |
* getWaitingThreads returns only and all waiting threads |
1518 |
*/ |
1519 |
public void testGetWaitingThreads() { |
1520 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1521 |
final Condition c = lock.writeLock().newCondition(); |
1522 |
Thread t1 = new Thread(new Runnable() { |
1523 |
public void run() { |
1524 |
try { |
1525 |
lock.writeLock().lock(); |
1526 |
threadAssertTrue(lock.getWaitingThreads(c).isEmpty()); |
1527 |
c.await(); |
1528 |
lock.writeLock().unlock(); |
1529 |
} |
1530 |
catch(InterruptedException e) { |
1531 |
threadUnexpectedException(); |
1532 |
} |
1533 |
} |
1534 |
}); |
1535 |
|
1536 |
Thread t2 = new Thread(new Runnable() { |
1537 |
public void run() { |
1538 |
try { |
1539 |
lock.writeLock().lock(); |
1540 |
threadAssertFalse(lock.getWaitingThreads(c).isEmpty()); |
1541 |
c.await(); |
1542 |
lock.writeLock().unlock(); |
1543 |
} |
1544 |
catch(InterruptedException e) { |
1545 |
threadUnexpectedException(); |
1546 |
} |
1547 |
} |
1548 |
}); |
1549 |
|
1550 |
try { |
1551 |
lock.writeLock().lock(); |
1552 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1553 |
lock.writeLock().unlock(); |
1554 |
t1.start(); |
1555 |
Thread.sleep(SHORT_DELAY_MS); |
1556 |
t2.start(); |
1557 |
Thread.sleep(SHORT_DELAY_MS); |
1558 |
lock.writeLock().lock(); |
1559 |
assertTrue(lock.hasWaiters(c)); |
1560 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
1561 |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
1562 |
c.signalAll(); |
1563 |
lock.writeLock().unlock(); |
1564 |
Thread.sleep(SHORT_DELAY_MS); |
1565 |
lock.writeLock().lock(); |
1566 |
assertFalse(lock.hasWaiters(c)); |
1567 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1568 |
lock.writeLock().unlock(); |
1569 |
t1.join(SHORT_DELAY_MS); |
1570 |
t2.join(SHORT_DELAY_MS); |
1571 |
assertFalse(t1.isAlive()); |
1572 |
assertFalse(t2.isAlive()); |
1573 |
} |
1574 |
catch (Exception ex) { |
1575 |
unexpectedException(); |
1576 |
} |
1577 |
} |
1578 |
|
1579 |
/** |
1580 |
* toString indicates current lock state |
1581 |
*/ |
1582 |
public void testToString() { |
1583 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1584 |
String us = lock.toString(); |
1585 |
assertTrue(us.indexOf("Write locks = 0") >= 0); |
1586 |
assertTrue(us.indexOf("Read locks = 0") >= 0); |
1587 |
lock.writeLock().lock(); |
1588 |
String ws = lock.toString(); |
1589 |
assertTrue(ws.indexOf("Write locks = 1") >= 0); |
1590 |
assertTrue(ws.indexOf("Read locks = 0") >= 0); |
1591 |
lock.writeLock().unlock(); |
1592 |
lock.readLock().lock(); |
1593 |
lock.readLock().lock(); |
1594 |
String rs = lock.toString(); |
1595 |
assertTrue(rs.indexOf("Write locks = 0") >= 0); |
1596 |
assertTrue(rs.indexOf("Read locks = 2") >= 0); |
1597 |
} |
1598 |
|
1599 |
/** |
1600 |
* readLock.toString indicates current lock state |
1601 |
*/ |
1602 |
public void testReadLockToString() { |
1603 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1604 |
String us = lock.readLock().toString(); |
1605 |
assertTrue(us.indexOf("Read locks = 0") >= 0); |
1606 |
lock.readLock().lock(); |
1607 |
lock.readLock().lock(); |
1608 |
String rs = lock.readLock().toString(); |
1609 |
assertTrue(rs.indexOf("Read locks = 2") >= 0); |
1610 |
} |
1611 |
|
1612 |
/** |
1613 |
* writeLock.toString indicates current lock state |
1614 |
*/ |
1615 |
public void testWriteLockToString() { |
1616 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1617 |
String us = lock.writeLock().toString(); |
1618 |
assertTrue(us.indexOf("Unlocked") >= 0); |
1619 |
lock.writeLock().lock(); |
1620 |
String ls = lock.writeLock().toString(); |
1621 |
assertTrue(ls.indexOf("Locked") >= 0); |
1622 |
} |
1623 |
|
1624 |
} |