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() { |
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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 |
} |
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|
65 |
/** |
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* 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()); |
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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()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
95 |
assertEquals(1, rl.getReadLockCount()); |
96 |
rl.readLock().unlock(); |
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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() { |
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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()); |
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assertEquals(1, rl.getReadLockCount()); |
120 |
rl.readLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
122 |
assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
124 |
} |
125 |
|
126 |
/** |
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* getWriteHoldCount returns number of recursive holds |
128 |
*/ |
129 |
public void testGetHoldCount() { |
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ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
131 |
for(int i = 1; i <= SIZE; i++) { |
132 |
lock.writeLock().lock(); |
133 |
assertEquals(i,lock.getWriteHoldCount()); |
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} |
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for(int i = SIZE; i > 0; i--) { |
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lock.writeLock().unlock(); |
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assertEquals(i-1,lock.getWriteHoldCount()); |
138 |
} |
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} |
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|
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|
142 |
/** |
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* write-unlocking an unlocked lock throws IllegalMonitorStateException |
144 |
*/ |
145 |
public void testUnlock_IllegalMonitorStateException() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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try { |
148 |
rl.writeLock().unlock(); |
149 |
shouldThrow(); |
150 |
} catch(IllegalMonitorStateException success){} |
151 |
} |
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|
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|
154 |
/** |
155 |
* write-lockInterruptibly is interruptible |
156 |
*/ |
157 |
public void testWriteLockInterruptibly_Interrupted() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
159 |
Thread t = new Thread(new Runnable() { |
160 |
public void run() { |
161 |
try { |
162 |
lock.writeLock().lockInterruptibly(); |
163 |
lock.writeLock().unlock(); |
164 |
lock.writeLock().lockInterruptibly(); |
165 |
lock.writeLock().unlock(); |
166 |
} catch(InterruptedException success){} |
167 |
} |
168 |
}); |
169 |
try { |
170 |
lock.writeLock().lock(); |
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t.start(); |
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t.interrupt(); |
173 |
lock.writeLock().unlock(); |
174 |
t.join(); |
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} catch(Exception e){ |
176 |
unexpectedException(); |
177 |
} |
178 |
} |
179 |
|
180 |
/** |
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* timed write-tryLock is interruptible |
182 |
*/ |
183 |
public void testWriteTryLock_Interrupted() { |
184 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
185 |
lock.writeLock().lock(); |
186 |
Thread t = new Thread(new Runnable() { |
187 |
public void run() { |
188 |
try { |
189 |
lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
190 |
} catch(InterruptedException success){} |
191 |
} |
192 |
}); |
193 |
try { |
194 |
t.start(); |
195 |
t.interrupt(); |
196 |
lock.writeLock().unlock(); |
197 |
t.join(); |
198 |
} catch(Exception e){ |
199 |
unexpectedException(); |
200 |
} |
201 |
} |
202 |
|
203 |
/** |
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* read-lockInterruptibly is interruptible |
205 |
*/ |
206 |
public void testReadLockInterruptibly_Interrupted() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
208 |
lock.writeLock().lock(); |
209 |
Thread t = new Thread(new Runnable() { |
210 |
public void run() { |
211 |
try { |
212 |
lock.readLock().lockInterruptibly(); |
213 |
} catch(InterruptedException success){} |
214 |
} |
215 |
}); |
216 |
try { |
217 |
t.start(); |
218 |
t.interrupt(); |
219 |
lock.writeLock().unlock(); |
220 |
t.join(); |
221 |
} catch(Exception e){ |
222 |
unexpectedException(); |
223 |
} |
224 |
} |
225 |
|
226 |
/** |
227 |
* timed read-tryLock is interruptible |
228 |
*/ |
229 |
public void testReadTryLock_Interrupted() { |
230 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
231 |
lock.writeLock().lock(); |
232 |
Thread t = new Thread(new Runnable() { |
233 |
public void run() { |
234 |
try { |
235 |
lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS); |
236 |
threadShouldThrow(); |
237 |
} catch(InterruptedException success){} |
238 |
} |
239 |
}); |
240 |
try { |
241 |
t.start(); |
242 |
t.interrupt(); |
243 |
t.join(); |
244 |
} catch(Exception e){ |
245 |
unexpectedException(); |
246 |
} |
247 |
} |
248 |
|
249 |
|
250 |
/** |
251 |
* write-tryLock fails if locked |
252 |
*/ |
253 |
public void testWriteTryLockWhenLocked() { |
254 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
255 |
lock.writeLock().lock(); |
256 |
Thread t = new Thread(new Runnable() { |
257 |
public void run() { |
258 |
threadAssertFalse(lock.writeLock().tryLock()); |
259 |
} |
260 |
}); |
261 |
try { |
262 |
t.start(); |
263 |
t.join(); |
264 |
lock.writeLock().unlock(); |
265 |
} catch(Exception e){ |
266 |
unexpectedException(); |
267 |
} |
268 |
} |
269 |
|
270 |
/** |
271 |
* read-tryLock fails if locked |
272 |
*/ |
273 |
public void testReadTryLockWhenLocked() { |
274 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
275 |
lock.writeLock().lock(); |
276 |
Thread t = new Thread(new Runnable() { |
277 |
public void run() { |
278 |
threadAssertFalse(lock.readLock().tryLock()); |
279 |
} |
280 |
}); |
281 |
try { |
282 |
t.start(); |
283 |
t.join(); |
284 |
lock.writeLock().unlock(); |
285 |
} catch(Exception e){ |
286 |
unexpectedException(); |
287 |
} |
288 |
} |
289 |
|
290 |
/** |
291 |
* Multiple threads can hold a read lock when not write-locked |
292 |
*/ |
293 |
public void testMultipleReadLocks() { |
294 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
295 |
lock.readLock().lock(); |
296 |
Thread t = new Thread(new Runnable() { |
297 |
public void run() { |
298 |
threadAssertTrue(lock.readLock().tryLock()); |
299 |
lock.readLock().unlock(); |
300 |
} |
301 |
}); |
302 |
try { |
303 |
t.start(); |
304 |
t.join(); |
305 |
lock.readLock().unlock(); |
306 |
} catch(Exception e){ |
307 |
unexpectedException(); |
308 |
} |
309 |
} |
310 |
|
311 |
/** |
312 |
* A writelock succeeds after reading threads unlock |
313 |
*/ |
314 |
public void testWriteAfterMultipleReadLocks() { |
315 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
316 |
lock.readLock().lock(); |
317 |
Thread t1 = new Thread(new Runnable() { |
318 |
public void run() { |
319 |
lock.readLock().lock(); |
320 |
lock.readLock().unlock(); |
321 |
} |
322 |
}); |
323 |
Thread t2 = new Thread(new Runnable() { |
324 |
public void run() { |
325 |
lock.writeLock().lock(); |
326 |
lock.writeLock().unlock(); |
327 |
} |
328 |
}); |
329 |
|
330 |
try { |
331 |
t1.start(); |
332 |
t2.start(); |
333 |
Thread.sleep(SHORT_DELAY_MS); |
334 |
lock.readLock().unlock(); |
335 |
t1.join(MEDIUM_DELAY_MS); |
336 |
t2.join(MEDIUM_DELAY_MS); |
337 |
assertTrue(!t1.isAlive()); |
338 |
assertTrue(!t2.isAlive()); |
339 |
|
340 |
} catch(Exception e){ |
341 |
unexpectedException(); |
342 |
} |
343 |
} |
344 |
|
345 |
/** |
346 |
* Readlocks succeed after a writing thread unlocks |
347 |
*/ |
348 |
public void testReadAfterWriteLock() { |
349 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
350 |
lock.writeLock().lock(); |
351 |
Thread t1 = new Thread(new Runnable() { |
352 |
public void run() { |
353 |
lock.readLock().lock(); |
354 |
lock.readLock().unlock(); |
355 |
} |
356 |
}); |
357 |
Thread t2 = new Thread(new Runnable() { |
358 |
public void run() { |
359 |
lock.readLock().lock(); |
360 |
lock.readLock().unlock(); |
361 |
} |
362 |
}); |
363 |
|
364 |
try { |
365 |
t1.start(); |
366 |
t2.start(); |
367 |
Thread.sleep(SHORT_DELAY_MS); |
368 |
lock.writeLock().unlock(); |
369 |
t1.join(MEDIUM_DELAY_MS); |
370 |
t2.join(MEDIUM_DELAY_MS); |
371 |
assertTrue(!t1.isAlive()); |
372 |
assertTrue(!t2.isAlive()); |
373 |
|
374 |
} catch(Exception e){ |
375 |
unexpectedException(); |
376 |
} |
377 |
} |
378 |
|
379 |
/** |
380 |
* Read trylock succeeds if write locked by current thread |
381 |
*/ |
382 |
public void testReadHoldingWriteLock() { |
383 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
384 |
lock.writeLock().lock(); |
385 |
assertTrue(lock.readLock().tryLock()); |
386 |
lock.readLock().unlock(); |
387 |
lock.writeLock().unlock(); |
388 |
} |
389 |
|
390 |
/** |
391 |
* Read lock succeeds if write locked by current thread even if |
392 |
* other threads are waiting |
393 |
*/ |
394 |
public void testReadHoldingWriteLock2() { |
395 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
396 |
lock.writeLock().lock(); |
397 |
Thread t1 = new Thread(new Runnable() { |
398 |
public void run() { |
399 |
lock.readLock().lock(); |
400 |
lock.readLock().unlock(); |
401 |
} |
402 |
}); |
403 |
Thread t2 = new Thread(new Runnable() { |
404 |
public void run() { |
405 |
lock.readLock().lock(); |
406 |
lock.readLock().unlock(); |
407 |
} |
408 |
}); |
409 |
|
410 |
try { |
411 |
t1.start(); |
412 |
t2.start(); |
413 |
lock.readLock().lock(); |
414 |
lock.readLock().unlock(); |
415 |
Thread.sleep(SHORT_DELAY_MS); |
416 |
lock.readLock().lock(); |
417 |
lock.readLock().unlock(); |
418 |
lock.writeLock().unlock(); |
419 |
t1.join(MEDIUM_DELAY_MS); |
420 |
t2.join(MEDIUM_DELAY_MS); |
421 |
assertTrue(!t1.isAlive()); |
422 |
assertTrue(!t2.isAlive()); |
423 |
|
424 |
} catch(Exception e){ |
425 |
unexpectedException(); |
426 |
} |
427 |
} |
428 |
|
429 |
/** |
430 |
* Fair Read trylock succeeds if write locked by current thread |
431 |
*/ |
432 |
public void testReadHoldingWriteLockFair() { |
433 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
434 |
lock.writeLock().lock(); |
435 |
assertTrue(lock.readLock().tryLock()); |
436 |
lock.readLock().unlock(); |
437 |
lock.writeLock().unlock(); |
438 |
} |
439 |
|
440 |
/** |
441 |
* Fair Read lock succeeds if write locked by current thread even if |
442 |
* other threads are waiting |
443 |
*/ |
444 |
public void testReadHoldingWriteLockFair2() { |
445 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true); |
446 |
lock.writeLock().lock(); |
447 |
Thread t1 = new Thread(new Runnable() { |
448 |
public void run() { |
449 |
lock.readLock().lock(); |
450 |
lock.readLock().unlock(); |
451 |
} |
452 |
}); |
453 |
Thread t2 = new Thread(new Runnable() { |
454 |
public void run() { |
455 |
lock.readLock().lock(); |
456 |
lock.readLock().unlock(); |
457 |
} |
458 |
}); |
459 |
|
460 |
try { |
461 |
t1.start(); |
462 |
t2.start(); |
463 |
lock.readLock().lock(); |
464 |
lock.readLock().unlock(); |
465 |
Thread.sleep(SHORT_DELAY_MS); |
466 |
lock.readLock().lock(); |
467 |
lock.readLock().unlock(); |
468 |
lock.writeLock().unlock(); |
469 |
t1.join(MEDIUM_DELAY_MS); |
470 |
t2.join(MEDIUM_DELAY_MS); |
471 |
assertTrue(!t1.isAlive()); |
472 |
assertTrue(!t2.isAlive()); |
473 |
|
474 |
} catch(Exception e){ |
475 |
unexpectedException(); |
476 |
} |
477 |
} |
478 |
|
479 |
|
480 |
/** |
481 |
* Read tryLock succeeds if readlocked but not writelocked |
482 |
*/ |
483 |
public void testTryLockWhenReadLocked() { |
484 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
485 |
lock.readLock().lock(); |
486 |
Thread t = new Thread(new Runnable() { |
487 |
public void run() { |
488 |
threadAssertTrue(lock.readLock().tryLock()); |
489 |
lock.readLock().unlock(); |
490 |
} |
491 |
}); |
492 |
try { |
493 |
t.start(); |
494 |
t.join(); |
495 |
lock.readLock().unlock(); |
496 |
} catch(Exception e){ |
497 |
unexpectedException(); |
498 |
} |
499 |
} |
500 |
|
501 |
|
502 |
|
503 |
/** |
504 |
* write tryLock fails when readlocked |
505 |
*/ |
506 |
public void testWriteTryLockWhenReadLocked() { |
507 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
508 |
lock.readLock().lock(); |
509 |
Thread t = new Thread(new Runnable() { |
510 |
public void run() { |
511 |
threadAssertFalse(lock.writeLock().tryLock()); |
512 |
} |
513 |
}); |
514 |
try { |
515 |
t.start(); |
516 |
t.join(); |
517 |
lock.readLock().unlock(); |
518 |
} catch(Exception e){ |
519 |
unexpectedException(); |
520 |
} |
521 |
} |
522 |
|
523 |
|
524 |
|
525 |
/** |
526 |
* write timed tryLock times out if locked |
527 |
*/ |
528 |
public void testWriteTryLock_Timeout() { |
529 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
530 |
lock.writeLock().lock(); |
531 |
Thread t = new Thread(new Runnable() { |
532 |
public void run() { |
533 |
try { |
534 |
threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS)); |
535 |
} catch (Exception ex) { |
536 |
threadUnexpectedException(); |
537 |
} |
538 |
} |
539 |
}); |
540 |
try { |
541 |
t.start(); |
542 |
t.join(); |
543 |
lock.writeLock().unlock(); |
544 |
} catch(Exception e){ |
545 |
unexpectedException(); |
546 |
} |
547 |
} |
548 |
|
549 |
/** |
550 |
* read timed tryLock times out if write-locked |
551 |
*/ |
552 |
public void testReadTryLock_Timeout() { |
553 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
554 |
lock.writeLock().lock(); |
555 |
Thread t = new Thread(new Runnable() { |
556 |
public void run() { |
557 |
try { |
558 |
threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS)); |
559 |
} catch (Exception ex) { |
560 |
threadUnexpectedException(); |
561 |
} |
562 |
} |
563 |
}); |
564 |
try { |
565 |
t.start(); |
566 |
t.join(); |
567 |
lock.writeLock().unlock(); |
568 |
} catch(Exception e){ |
569 |
unexpectedException(); |
570 |
} |
571 |
} |
572 |
|
573 |
|
574 |
/** |
575 |
* write lockInterruptibly succeeds if lock free else is interruptible |
576 |
*/ |
577 |
public void testWriteLockInterruptibly() { |
578 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
579 |
try { |
580 |
lock.writeLock().lockInterruptibly(); |
581 |
} catch(Exception e) { |
582 |
unexpectedException(); |
583 |
} |
584 |
Thread t = new Thread(new Runnable() { |
585 |
public void run() { |
586 |
try { |
587 |
lock.writeLock().lockInterruptibly(); |
588 |
threadShouldThrow(); |
589 |
} |
590 |
catch(InterruptedException success) { |
591 |
} |
592 |
} |
593 |
}); |
594 |
try { |
595 |
t.start(); |
596 |
t.interrupt(); |
597 |
t.join(); |
598 |
lock.writeLock().unlock(); |
599 |
} catch(Exception e){ |
600 |
unexpectedException(); |
601 |
} |
602 |
} |
603 |
|
604 |
/** |
605 |
* read lockInterruptibly succeeds if lock free else is interruptible |
606 |
*/ |
607 |
public void testReadLockInterruptibly() { |
608 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
609 |
try { |
610 |
lock.writeLock().lockInterruptibly(); |
611 |
} catch(Exception e) { |
612 |
unexpectedException(); |
613 |
} |
614 |
Thread t = new Thread(new Runnable() { |
615 |
public void run() { |
616 |
try { |
617 |
lock.readLock().lockInterruptibly(); |
618 |
threadShouldThrow(); |
619 |
} |
620 |
catch(InterruptedException success) { |
621 |
} |
622 |
} |
623 |
}); |
624 |
try { |
625 |
t.start(); |
626 |
t.interrupt(); |
627 |
t.join(); |
628 |
lock.writeLock().unlock(); |
629 |
} catch(Exception e){ |
630 |
unexpectedException(); |
631 |
} |
632 |
} |
633 |
|
634 |
/** |
635 |
* Calling await without holding lock throws IllegalMonitorStateException |
636 |
*/ |
637 |
public void testAwait_IllegalMonitor() { |
638 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
639 |
final Condition c = lock.writeLock().newCondition(); |
640 |
try { |
641 |
c.await(); |
642 |
shouldThrow(); |
643 |
} |
644 |
catch (IllegalMonitorStateException success) { |
645 |
} |
646 |
catch (Exception ex) { |
647 |
shouldThrow(); |
648 |
} |
649 |
} |
650 |
|
651 |
/** |
652 |
* Calling signal without holding lock throws IllegalMonitorStateException |
653 |
*/ |
654 |
public void testSignal_IllegalMonitor() { |
655 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
656 |
final Condition c = lock.writeLock().newCondition(); |
657 |
try { |
658 |
c.signal(); |
659 |
shouldThrow(); |
660 |
} |
661 |
catch (IllegalMonitorStateException success) { |
662 |
} |
663 |
catch (Exception ex) { |
664 |
unexpectedException(); |
665 |
} |
666 |
} |
667 |
|
668 |
/** |
669 |
* awaitNanos without a signal times out |
670 |
*/ |
671 |
public void testAwaitNanos_Timeout() { |
672 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
673 |
final Condition c = lock.writeLock().newCondition(); |
674 |
try { |
675 |
lock.writeLock().lock(); |
676 |
long t = c.awaitNanos(100); |
677 |
assertTrue(t <= 0); |
678 |
lock.writeLock().unlock(); |
679 |
} |
680 |
catch (Exception ex) { |
681 |
unexpectedException(); |
682 |
} |
683 |
} |
684 |
|
685 |
|
686 |
/** |
687 |
* timed await without a signal times out |
688 |
*/ |
689 |
public void testAwait_Timeout() { |
690 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
691 |
final Condition c = lock.writeLock().newCondition(); |
692 |
try { |
693 |
lock.writeLock().lock(); |
694 |
lock.writeLock().unlock(); |
695 |
} |
696 |
catch (Exception ex) { |
697 |
unexpectedException(); |
698 |
} |
699 |
} |
700 |
|
701 |
/** |
702 |
* awaitUntil without a signal times out |
703 |
*/ |
704 |
public void testAwaitUntil_Timeout() { |
705 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
706 |
final Condition c = lock.writeLock().newCondition(); |
707 |
try { |
708 |
lock.writeLock().lock(); |
709 |
java.util.Date d = new java.util.Date(); |
710 |
lock.writeLock().unlock(); |
711 |
} |
712 |
catch (Exception ex) { |
713 |
unexpectedException(); |
714 |
} |
715 |
} |
716 |
|
717 |
/** |
718 |
* await returns when signalled |
719 |
*/ |
720 |
public void testAwait() { |
721 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
722 |
final Condition c = lock.writeLock().newCondition(); |
723 |
Thread t = new Thread(new Runnable() { |
724 |
public void run() { |
725 |
try { |
726 |
lock.writeLock().lock(); |
727 |
c.await(); |
728 |
lock.writeLock().unlock(); |
729 |
} |
730 |
catch(InterruptedException e) { |
731 |
threadUnexpectedException(); |
732 |
} |
733 |
} |
734 |
}); |
735 |
|
736 |
try { |
737 |
t.start(); |
738 |
Thread.sleep(SHORT_DELAY_MS); |
739 |
lock.writeLock().lock(); |
740 |
c.signal(); |
741 |
lock.writeLock().unlock(); |
742 |
t.join(SHORT_DELAY_MS); |
743 |
assertFalse(t.isAlive()); |
744 |
} |
745 |
catch (Exception ex) { |
746 |
unexpectedException(); |
747 |
} |
748 |
} |
749 |
|
750 |
/** A helper class for uninterruptible wait tests */ |
751 |
class UninterruptableThread extends Thread { |
752 |
private Lock lock; |
753 |
private Condition c; |
754 |
|
755 |
public volatile boolean canAwake = false; |
756 |
public volatile boolean interrupted = false; |
757 |
public volatile boolean lockStarted = false; |
758 |
|
759 |
public UninterruptableThread(Lock lock, Condition c) { |
760 |
this.lock = lock; |
761 |
this.c = c; |
762 |
} |
763 |
|
764 |
public synchronized void run() { |
765 |
lock.lock(); |
766 |
lockStarted = true; |
767 |
|
768 |
while (!canAwake) { |
769 |
c.awaitUninterruptibly(); |
770 |
} |
771 |
|
772 |
interrupted = isInterrupted(); |
773 |
lock.unlock(); |
774 |
} |
775 |
} |
776 |
|
777 |
/** |
778 |
* awaitUninterruptibly doesn't abort on interrupt |
779 |
*/ |
780 |
public void testAwaitUninterruptibly() { |
781 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
782 |
final Condition c = lock.writeLock().newCondition(); |
783 |
UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c); |
784 |
|
785 |
try { |
786 |
thread.start(); |
787 |
|
788 |
while (!thread.lockStarted) { |
789 |
Thread.sleep(100); |
790 |
} |
791 |
|
792 |
lock.writeLock().lock(); |
793 |
try { |
794 |
thread.interrupt(); |
795 |
thread.canAwake = true; |
796 |
c.signal(); |
797 |
} finally { |
798 |
lock.writeLock().unlock(); |
799 |
} |
800 |
|
801 |
thread.join(); |
802 |
assertTrue(thread.interrupted); |
803 |
assertFalse(thread.isAlive()); |
804 |
} catch (Exception ex) { |
805 |
unexpectedException(); |
806 |
} |
807 |
} |
808 |
|
809 |
/** |
810 |
* await is interruptible |
811 |
*/ |
812 |
public void testAwait_Interrupt() { |
813 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
814 |
final Condition c = lock.writeLock().newCondition(); |
815 |
Thread t = new Thread(new Runnable() { |
816 |
public void run() { |
817 |
try { |
818 |
lock.writeLock().lock(); |
819 |
c.await(); |
820 |
lock.writeLock().unlock(); |
821 |
threadShouldThrow(); |
822 |
} |
823 |
catch(InterruptedException success) { |
824 |
} |
825 |
} |
826 |
}); |
827 |
|
828 |
try { |
829 |
t.start(); |
830 |
Thread.sleep(SHORT_DELAY_MS); |
831 |
t.interrupt(); |
832 |
t.join(SHORT_DELAY_MS); |
833 |
assertFalse(t.isAlive()); |
834 |
} |
835 |
catch (Exception ex) { |
836 |
unexpectedException(); |
837 |
} |
838 |
} |
839 |
|
840 |
/** |
841 |
* awaitNanos is interruptible |
842 |
*/ |
843 |
public void testAwaitNanos_Interrupt() { |
844 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
845 |
final Condition c = lock.writeLock().newCondition(); |
846 |
Thread t = new Thread(new Runnable() { |
847 |
public void run() { |
848 |
try { |
849 |
lock.writeLock().lock(); |
850 |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
851 |
lock.writeLock().unlock(); |
852 |
threadShouldThrow(); |
853 |
} |
854 |
catch(InterruptedException success) { |
855 |
} |
856 |
} |
857 |
}); |
858 |
|
859 |
try { |
860 |
t.start(); |
861 |
Thread.sleep(SHORT_DELAY_MS); |
862 |
t.interrupt(); |
863 |
t.join(SHORT_DELAY_MS); |
864 |
assertFalse(t.isAlive()); |
865 |
} |
866 |
catch (Exception ex) { |
867 |
unexpectedException(); |
868 |
} |
869 |
} |
870 |
|
871 |
/** |
872 |
* awaitUntil is interruptible |
873 |
*/ |
874 |
public void testAwaitUntil_Interrupt() { |
875 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
876 |
final Condition c = lock.writeLock().newCondition(); |
877 |
Thread t = new Thread(new Runnable() { |
878 |
public void run() { |
879 |
try { |
880 |
lock.writeLock().lock(); |
881 |
java.util.Date d = new java.util.Date(); |
882 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
883 |
lock.writeLock().unlock(); |
884 |
threadShouldThrow(); |
885 |
} |
886 |
catch(InterruptedException success) { |
887 |
} |
888 |
} |
889 |
}); |
890 |
|
891 |
try { |
892 |
t.start(); |
893 |
Thread.sleep(SHORT_DELAY_MS); |
894 |
t.interrupt(); |
895 |
t.join(SHORT_DELAY_MS); |
896 |
assertFalse(t.isAlive()); |
897 |
} |
898 |
catch (Exception ex) { |
899 |
unexpectedException(); |
900 |
} |
901 |
} |
902 |
|
903 |
/** |
904 |
* signalAll wakes up all threads |
905 |
*/ |
906 |
public void testSignalAll() { |
907 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
908 |
final Condition c = lock.writeLock().newCondition(); |
909 |
Thread t1 = new Thread(new Runnable() { |
910 |
public void run() { |
911 |
try { |
912 |
lock.writeLock().lock(); |
913 |
c.await(); |
914 |
lock.writeLock().unlock(); |
915 |
} |
916 |
catch(InterruptedException e) { |
917 |
threadUnexpectedException(); |
918 |
} |
919 |
} |
920 |
}); |
921 |
|
922 |
Thread t2 = new Thread(new Runnable() { |
923 |
public void run() { |
924 |
try { |
925 |
lock.writeLock().lock(); |
926 |
c.await(); |
927 |
lock.writeLock().unlock(); |
928 |
} |
929 |
catch(InterruptedException e) { |
930 |
threadUnexpectedException(); |
931 |
} |
932 |
} |
933 |
}); |
934 |
|
935 |
try { |
936 |
t1.start(); |
937 |
t2.start(); |
938 |
Thread.sleep(SHORT_DELAY_MS); |
939 |
lock.writeLock().lock(); |
940 |
c.signalAll(); |
941 |
lock.writeLock().unlock(); |
942 |
t1.join(SHORT_DELAY_MS); |
943 |
t2.join(SHORT_DELAY_MS); |
944 |
assertFalse(t1.isAlive()); |
945 |
assertFalse(t2.isAlive()); |
946 |
} |
947 |
catch (Exception ex) { |
948 |
unexpectedException(); |
949 |
} |
950 |
} |
951 |
|
952 |
/** |
953 |
* A serialized lock deserializes as unlocked |
954 |
*/ |
955 |
public void testSerialization() { |
956 |
ReentrantReadWriteLock l = new ReentrantReadWriteLock(); |
957 |
l.readLock().lock(); |
958 |
l.readLock().unlock(); |
959 |
|
960 |
try { |
961 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
962 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
963 |
out.writeObject(l); |
964 |
out.close(); |
965 |
|
966 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
967 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
968 |
ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject(); |
969 |
r.readLock().lock(); |
970 |
r.readLock().unlock(); |
971 |
} catch(Exception e){ |
972 |
e.printStackTrace(); |
973 |
unexpectedException(); |
974 |
} |
975 |
} |
976 |
|
977 |
/** |
978 |
* hasQueuedThreads reports whether there are waiting threads |
979 |
*/ |
980 |
public void testhasQueuedThreads() { |
981 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
982 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
983 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
984 |
try { |
985 |
assertFalse(lock.hasQueuedThreads()); |
986 |
lock.writeLock().lock(); |
987 |
t1.start(); |
988 |
Thread.sleep(SHORT_DELAY_MS); |
989 |
assertTrue(lock.hasQueuedThreads()); |
990 |
t2.start(); |
991 |
Thread.sleep(SHORT_DELAY_MS); |
992 |
assertTrue(lock.hasQueuedThreads()); |
993 |
t1.interrupt(); |
994 |
Thread.sleep(SHORT_DELAY_MS); |
995 |
assertTrue(lock.hasQueuedThreads()); |
996 |
lock.writeLock().unlock(); |
997 |
Thread.sleep(SHORT_DELAY_MS); |
998 |
assertFalse(lock.hasQueuedThreads()); |
999 |
t1.join(); |
1000 |
t2.join(); |
1001 |
} catch(Exception e){ |
1002 |
unexpectedException(); |
1003 |
} |
1004 |
} |
1005 |
|
1006 |
/** |
1007 |
* hasQueuedThread(null) throws NPE |
1008 |
*/ |
1009 |
public void testHasQueuedThreadNPE() { |
1010 |
final ReentrantReadWriteLock sync = new ReentrantReadWriteLock(); |
1011 |
try { |
1012 |
sync.hasQueuedThread(null); |
1013 |
shouldThrow(); |
1014 |
} catch (NullPointerException success) { |
1015 |
} |
1016 |
} |
1017 |
|
1018 |
/** |
1019 |
* hasQueuedThread reports whether a thread is queued. |
1020 |
*/ |
1021 |
public void testHasQueuedThread() { |
1022 |
final ReentrantReadWriteLock sync = new ReentrantReadWriteLock(); |
1023 |
Thread t1 = new Thread(new InterruptedLockRunnable(sync)); |
1024 |
Thread t2 = new Thread(new InterruptibleLockRunnable(sync)); |
1025 |
try { |
1026 |
assertFalse(sync.hasQueuedThread(t1)); |
1027 |
assertFalse(sync.hasQueuedThread(t2)); |
1028 |
sync.writeLock().lock(); |
1029 |
t1.start(); |
1030 |
Thread.sleep(SHORT_DELAY_MS); |
1031 |
assertTrue(sync.hasQueuedThread(t1)); |
1032 |
t2.start(); |
1033 |
Thread.sleep(SHORT_DELAY_MS); |
1034 |
assertTrue(sync.hasQueuedThread(t1)); |
1035 |
assertTrue(sync.hasQueuedThread(t2)); |
1036 |
t1.interrupt(); |
1037 |
Thread.sleep(SHORT_DELAY_MS); |
1038 |
assertFalse(sync.hasQueuedThread(t1)); |
1039 |
assertTrue(sync.hasQueuedThread(t2)); |
1040 |
sync.writeLock().unlock(); |
1041 |
Thread.sleep(SHORT_DELAY_MS); |
1042 |
assertFalse(sync.hasQueuedThread(t1)); |
1043 |
Thread.sleep(SHORT_DELAY_MS); |
1044 |
assertFalse(sync.hasQueuedThread(t2)); |
1045 |
t1.join(); |
1046 |
t2.join(); |
1047 |
} catch(Exception e){ |
1048 |
unexpectedException(); |
1049 |
} |
1050 |
} |
1051 |
|
1052 |
|
1053 |
/** |
1054 |
* getQueueLength reports number of waiting threads |
1055 |
*/ |
1056 |
public void testGetQueueLength() { |
1057 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1058 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1059 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1060 |
try { |
1061 |
assertEquals(0, lock.getQueueLength()); |
1062 |
lock.writeLock().lock(); |
1063 |
t1.start(); |
1064 |
Thread.sleep(SHORT_DELAY_MS); |
1065 |
assertEquals(1, lock.getQueueLength()); |
1066 |
t2.start(); |
1067 |
Thread.sleep(SHORT_DELAY_MS); |
1068 |
assertEquals(2, lock.getQueueLength()); |
1069 |
t1.interrupt(); |
1070 |
Thread.sleep(SHORT_DELAY_MS); |
1071 |
assertEquals(1, lock.getQueueLength()); |
1072 |
lock.writeLock().unlock(); |
1073 |
Thread.sleep(SHORT_DELAY_MS); |
1074 |
assertEquals(0, lock.getQueueLength()); |
1075 |
t1.join(); |
1076 |
t2.join(); |
1077 |
} catch(Exception e){ |
1078 |
unexpectedException(); |
1079 |
} |
1080 |
} |
1081 |
|
1082 |
/** |
1083 |
* getQueuedThreads includes waiting threads |
1084 |
*/ |
1085 |
public void testGetQueuedThreads() { |
1086 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1087 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
1088 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
1089 |
try { |
1090 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1091 |
lock.writeLock().lock(); |
1092 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1093 |
t1.start(); |
1094 |
Thread.sleep(SHORT_DELAY_MS); |
1095 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
1096 |
t2.start(); |
1097 |
Thread.sleep(SHORT_DELAY_MS); |
1098 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
1099 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
1100 |
t1.interrupt(); |
1101 |
Thread.sleep(SHORT_DELAY_MS); |
1102 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
1103 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
1104 |
lock.writeLock().unlock(); |
1105 |
Thread.sleep(SHORT_DELAY_MS); |
1106 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
1107 |
t1.join(); |
1108 |
t2.join(); |
1109 |
} catch(Exception e){ |
1110 |
unexpectedException(); |
1111 |
} |
1112 |
} |
1113 |
|
1114 |
/** |
1115 |
* hasWaiters throws NPE if null |
1116 |
*/ |
1117 |
public void testHasWaitersNPE() { |
1118 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1119 |
try { |
1120 |
lock.hasWaiters(null); |
1121 |
shouldThrow(); |
1122 |
} catch (NullPointerException success) { |
1123 |
} catch (Exception ex) { |
1124 |
unexpectedException(); |
1125 |
} |
1126 |
} |
1127 |
|
1128 |
/** |
1129 |
* getWaitQueueLength throws NPE if null |
1130 |
*/ |
1131 |
public void testGetWaitQueueLengthNPE() { |
1132 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1133 |
try { |
1134 |
lock.getWaitQueueLength(null); |
1135 |
shouldThrow(); |
1136 |
} catch (NullPointerException success) { |
1137 |
} catch (Exception ex) { |
1138 |
unexpectedException(); |
1139 |
} |
1140 |
} |
1141 |
|
1142 |
|
1143 |
/** |
1144 |
* getWaitingThreads throws NPE if null |
1145 |
*/ |
1146 |
public void testGetWaitingThreadsNPE() { |
1147 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1148 |
try { |
1149 |
lock.getWaitingThreads(null); |
1150 |
shouldThrow(); |
1151 |
} catch (NullPointerException success) { |
1152 |
} catch (Exception ex) { |
1153 |
unexpectedException(); |
1154 |
} |
1155 |
} |
1156 |
|
1157 |
/** |
1158 |
* hasWaiters throws IAE if not owned |
1159 |
*/ |
1160 |
public void testHasWaitersIAE() { |
1161 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1162 |
final Condition c = (lock.writeLock().newCondition()); |
1163 |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(); |
1164 |
try { |
1165 |
lock2.hasWaiters(c); |
1166 |
shouldThrow(); |
1167 |
} catch (IllegalArgumentException success) { |
1168 |
} catch (Exception ex) { |
1169 |
unexpectedException(); |
1170 |
} |
1171 |
} |
1172 |
|
1173 |
/** |
1174 |
* hasWaiters throws IMSE if not locked |
1175 |
*/ |
1176 |
public void testHasWaitersIMSE() { |
1177 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1178 |
final Condition c = (lock.writeLock().newCondition()); |
1179 |
try { |
1180 |
lock.hasWaiters(c); |
1181 |
shouldThrow(); |
1182 |
} catch (IllegalMonitorStateException success) { |
1183 |
} catch (Exception ex) { |
1184 |
unexpectedException(); |
1185 |
} |
1186 |
} |
1187 |
|
1188 |
|
1189 |
/** |
1190 |
* getWaitQueueLength throws IAE if not owned |
1191 |
*/ |
1192 |
public void testGetWaitQueueLengthIAE() { |
1193 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1194 |
final Condition c = (lock.writeLock().newCondition()); |
1195 |
final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock(); |
1196 |
try { |
1197 |
lock2.getWaitQueueLength(c); |
1198 |
shouldThrow(); |
1199 |
} catch (IllegalArgumentException success) { |
1200 |
} catch (Exception ex) { |
1201 |
unexpectedException(); |
1202 |
} |
1203 |
} |
1204 |
|
1205 |
/** |
1206 |
* getWaitQueueLength throws IMSE if not locked |
1207 |
*/ |
1208 |
public void testGetWaitQueueLengthIMSE() { |
1209 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1210 |
final Condition c = (lock.writeLock().newCondition()); |
1211 |
try { |
1212 |
lock.getWaitQueueLength(c); |
1213 |
shouldThrow(); |
1214 |
} catch (IllegalMonitorStateException success) { |
1215 |
} catch (Exception ex) { |
1216 |
unexpectedException(); |
1217 |
} |
1218 |
} |
1219 |
|
1220 |
|
1221 |
/** |
1222 |
* getWaitingThreads throws IAE if not owned |
1223 |
*/ |
1224 |
public void testGetWaitingThreadsIAE() { |
1225 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1226 |
final Condition c = (lock.writeLock().newCondition()); |
1227 |
final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock(); |
1228 |
try { |
1229 |
lock2.getWaitingThreads(c); |
1230 |
shouldThrow(); |
1231 |
} catch (IllegalArgumentException success) { |
1232 |
} catch (Exception ex) { |
1233 |
unexpectedException(); |
1234 |
} |
1235 |
} |
1236 |
|
1237 |
/** |
1238 |
* getWaitingThreads throws IMSE if not locked |
1239 |
*/ |
1240 |
public void testGetWaitingThreadsIMSE() { |
1241 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1242 |
final Condition c = (lock.writeLock().newCondition()); |
1243 |
try { |
1244 |
lock.getWaitingThreads(c); |
1245 |
shouldThrow(); |
1246 |
} catch (IllegalMonitorStateException success) { |
1247 |
} catch (Exception ex) { |
1248 |
unexpectedException(); |
1249 |
} |
1250 |
} |
1251 |
|
1252 |
|
1253 |
/** |
1254 |
* hasWaiters returns true when a thread is waiting, else false |
1255 |
*/ |
1256 |
public void testHasWaiters() { |
1257 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1258 |
final Condition c = (lock.writeLock().newCondition()); |
1259 |
Thread t = new Thread(new Runnable() { |
1260 |
public void run() { |
1261 |
try { |
1262 |
lock.writeLock().lock(); |
1263 |
threadAssertFalse(lock.hasWaiters(c)); |
1264 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
1265 |
c.await(); |
1266 |
lock.writeLock().unlock(); |
1267 |
} |
1268 |
catch(InterruptedException e) { |
1269 |
threadUnexpectedException(); |
1270 |
} |
1271 |
} |
1272 |
}); |
1273 |
|
1274 |
try { |
1275 |
t.start(); |
1276 |
Thread.sleep(SHORT_DELAY_MS); |
1277 |
lock.writeLock().lock(); |
1278 |
assertTrue(lock.hasWaiters(c)); |
1279 |
assertEquals(1, lock.getWaitQueueLength(c)); |
1280 |
c.signal(); |
1281 |
lock.writeLock().unlock(); |
1282 |
Thread.sleep(SHORT_DELAY_MS); |
1283 |
lock.writeLock().lock(); |
1284 |
assertFalse(lock.hasWaiters(c)); |
1285 |
assertEquals(0, lock.getWaitQueueLength(c)); |
1286 |
lock.writeLock().unlock(); |
1287 |
t.join(SHORT_DELAY_MS); |
1288 |
assertFalse(t.isAlive()); |
1289 |
} |
1290 |
catch (Exception ex) { |
1291 |
unexpectedException(); |
1292 |
} |
1293 |
} |
1294 |
|
1295 |
/** |
1296 |
* getWaitQueueLength returns number of waiting threads |
1297 |
*/ |
1298 |
public void testGetWaitQueueLength() { |
1299 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1300 |
final Condition c = (lock.writeLock().newCondition()); |
1301 |
Thread t = new Thread(new Runnable() { |
1302 |
public void run() { |
1303 |
try { |
1304 |
lock.writeLock().lock(); |
1305 |
threadAssertFalse(lock.hasWaiters(c)); |
1306 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
1307 |
c.await(); |
1308 |
lock.writeLock().unlock(); |
1309 |
} |
1310 |
catch(InterruptedException e) { |
1311 |
threadUnexpectedException(); |
1312 |
} |
1313 |
} |
1314 |
}); |
1315 |
|
1316 |
try { |
1317 |
t.start(); |
1318 |
Thread.sleep(SHORT_DELAY_MS); |
1319 |
lock.writeLock().lock(); |
1320 |
assertTrue(lock.hasWaiters(c)); |
1321 |
assertEquals(1, lock.getWaitQueueLength(c)); |
1322 |
c.signal(); |
1323 |
lock.writeLock().unlock(); |
1324 |
Thread.sleep(SHORT_DELAY_MS); |
1325 |
lock.writeLock().lock(); |
1326 |
assertFalse(lock.hasWaiters(c)); |
1327 |
assertEquals(0, lock.getWaitQueueLength(c)); |
1328 |
lock.writeLock().unlock(); |
1329 |
t.join(SHORT_DELAY_MS); |
1330 |
assertFalse(t.isAlive()); |
1331 |
} |
1332 |
catch (Exception ex) { |
1333 |
unexpectedException(); |
1334 |
} |
1335 |
} |
1336 |
|
1337 |
|
1338 |
/** |
1339 |
* getWaitingThreads returns only and all waiting threads |
1340 |
*/ |
1341 |
public void testGetWaitingThreads() { |
1342 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
1343 |
final Condition c = lock.writeLock().newCondition(); |
1344 |
Thread t1 = new Thread(new Runnable() { |
1345 |
public void run() { |
1346 |
try { |
1347 |
lock.writeLock().lock(); |
1348 |
threadAssertTrue(lock.getWaitingThreads(c).isEmpty()); |
1349 |
c.await(); |
1350 |
lock.writeLock().unlock(); |
1351 |
} |
1352 |
catch(InterruptedException e) { |
1353 |
threadUnexpectedException(); |
1354 |
} |
1355 |
} |
1356 |
}); |
1357 |
|
1358 |
Thread t2 = new Thread(new Runnable() { |
1359 |
public void run() { |
1360 |
try { |
1361 |
lock.writeLock().lock(); |
1362 |
threadAssertFalse(lock.getWaitingThreads(c).isEmpty()); |
1363 |
c.await(); |
1364 |
lock.writeLock().unlock(); |
1365 |
} |
1366 |
catch(InterruptedException e) { |
1367 |
threadUnexpectedException(); |
1368 |
} |
1369 |
} |
1370 |
}); |
1371 |
|
1372 |
try { |
1373 |
lock.writeLock().lock(); |
1374 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1375 |
lock.writeLock().unlock(); |
1376 |
t1.start(); |
1377 |
Thread.sleep(SHORT_DELAY_MS); |
1378 |
t2.start(); |
1379 |
Thread.sleep(SHORT_DELAY_MS); |
1380 |
lock.writeLock().lock(); |
1381 |
assertTrue(lock.hasWaiters(c)); |
1382 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
1383 |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
1384 |
c.signalAll(); |
1385 |
lock.writeLock().unlock(); |
1386 |
Thread.sleep(SHORT_DELAY_MS); |
1387 |
lock.writeLock().lock(); |
1388 |
assertFalse(lock.hasWaiters(c)); |
1389 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
1390 |
lock.writeLock().unlock(); |
1391 |
t1.join(SHORT_DELAY_MS); |
1392 |
t2.join(SHORT_DELAY_MS); |
1393 |
assertFalse(t1.isAlive()); |
1394 |
assertFalse(t2.isAlive()); |
1395 |
} |
1396 |
catch (Exception ex) { |
1397 |
unexpectedException(); |
1398 |
} |
1399 |
} |
1400 |
|
1401 |
/** |
1402 |
* toString indicates current lock state |
1403 |
*/ |
1404 |
public void testToString() { |
1405 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1406 |
String us = lock.toString(); |
1407 |
assertTrue(us.indexOf("Write locks = 0") >= 0); |
1408 |
assertTrue(us.indexOf("Read locks = 0") >= 0); |
1409 |
lock.writeLock().lock(); |
1410 |
String ws = lock.toString(); |
1411 |
assertTrue(ws.indexOf("Write locks = 1") >= 0); |
1412 |
assertTrue(ws.indexOf("Read locks = 0") >= 0); |
1413 |
lock.writeLock().unlock(); |
1414 |
lock.readLock().lock(); |
1415 |
lock.readLock().lock(); |
1416 |
String rs = lock.toString(); |
1417 |
assertTrue(rs.indexOf("Write locks = 0") >= 0); |
1418 |
assertTrue(rs.indexOf("Read locks = 2") >= 0); |
1419 |
} |
1420 |
|
1421 |
/** |
1422 |
* readLock.toString indicates current lock state |
1423 |
*/ |
1424 |
public void testReadLockToString() { |
1425 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1426 |
String us = lock.readLock().toString(); |
1427 |
assertTrue(us.indexOf("Read locks = 0") >= 0); |
1428 |
lock.readLock().lock(); |
1429 |
lock.readLock().lock(); |
1430 |
String rs = lock.readLock().toString(); |
1431 |
assertTrue(rs.indexOf("Read locks = 2") >= 0); |
1432 |
} |
1433 |
|
1434 |
/** |
1435 |
* writeLock.toString indicates current lock state |
1436 |
*/ |
1437 |
public void testWriteLockToString() { |
1438 |
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
1439 |
String us = lock.writeLock().toString(); |
1440 |
assertTrue(us.indexOf("Unlocked") >= 0); |
1441 |
lock.writeLock().lock(); |
1442 |
String ls = lock.writeLock().toString(); |
1443 |
assertTrue(ls.indexOf("Locked") >= 0); |
1444 |
} |
1445 |
|
1446 |
} |