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1 : dl 1.1 /*
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 : jsr166 1.39 * http://creativecommons.org/publicdomain/zero/1.0/
5 : jsr166 1.22 * Other contributors include Andrew Wright, Jeffrey Hayes,
6 :     * Pat Fisher, Mike Judd.
7 : dl 1.1 */
8 :    
9 : jsr166 1.30 import static java.util.concurrent.TimeUnit.MILLISECONDS;
10 : jsr166 1.45 import static java.util.concurrent.TimeUnit.NANOSECONDS;
11 : jsr166 1.47
12 :     import java.util.Arrays;
13 :     import java.util.Collection;
14 :     import java.util.HashSet;
15 : jsr166 1.41 import java.util.concurrent.locks.AbstractQueuedSynchronizer;
16 :     import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject;
17 : dl 1.1
18 : jsr166 1.47 import junit.framework.AssertionFailedError;
19 :     import junit.framework.Test;
20 :     import junit.framework.TestSuite;
21 :    
22 : dl 1.1 public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
23 :     public static void main(String[] args) {
24 : jsr166 1.34 junit.textui.TestRunner.run(suite());
25 : dl 1.1 }
26 :     public static Test suite() {
27 :     return new TestSuite(AbstractQueuedSynchronizerTest.class);
28 :     }
29 :    
30 :     /**
31 : jsr166 1.41 * A simple mutex class, adapted from the class javadoc. Exclusive
32 :     * acquire tests exercise this as a sample user extension. Other
33 :     * methods/features of AbstractQueuedSynchronizer are tested via
34 :     * other test classes, including those for ReentrantLock,
35 :     * ReentrantReadWriteLock, and Semaphore.
36 : dl 1.12 */
37 :     static class Mutex extends AbstractQueuedSynchronizer {
38 : jsr166 1.41 /** An eccentric value for locked synchronizer state. */
39 :     static final int LOCKED = (1 << 31) | (1 << 15);
40 :    
41 :     static final int UNLOCKED = 0;
42 :    
43 :     @Override public boolean isHeldExclusively() {
44 :     int state = getState();
45 :     assertTrue(state == UNLOCKED || state == LOCKED);
46 :     return state == LOCKED;
47 :     }
48 : jsr166 1.22
49 : jsr166 1.41 @Override public boolean tryAcquire(int acquires) {
50 :     assertEquals(LOCKED, acquires);
51 :     return compareAndSetState(UNLOCKED, LOCKED);
52 : dl 1.12 }
53 : jsr166 1.22
54 : jsr166 1.41 @Override public boolean tryRelease(int releases) {
55 :     if (getState() != LOCKED) throw new IllegalMonitorStateException();
56 :     assertEquals(LOCKED, releases);
57 :     setState(UNLOCKED);
58 : dl 1.12 return true;
59 :     }
60 : jsr166 1.22
61 : jsr166 1.41 public boolean tryAcquireNanos(long nanos) throws InterruptedException {
62 :     return tryAcquireNanos(LOCKED, nanos);
63 : jsr166 1.35 }
64 : dl 1.12
65 : jsr166 1.41 public boolean tryAcquire() {
66 :     return tryAcquire(LOCKED);
67 :     }
68 :    
69 :     public boolean tryRelease() {
70 :     return tryRelease(LOCKED);
71 :     }
72 :    
73 :     public void acquire() {
74 :     acquire(LOCKED);
75 :     }
76 :    
77 :     public void acquireInterruptibly() throws InterruptedException {
78 :     acquireInterruptibly(LOCKED);
79 :     }
80 :    
81 :     public void release() {
82 :     release(LOCKED);
83 :     }
84 :    
85 :     public ConditionObject newCondition() {
86 :     return new ConditionObject();
87 :     }
88 : dl 1.12 }
89 :    
90 :     /**
91 :     * A simple latch class, to test shared mode.
92 :     */
93 : jsr166 1.22 static class BooleanLatch extends AbstractQueuedSynchronizer {
94 : dl 1.12 public boolean isSignalled() { return getState() != 0; }
95 :    
96 :     public int tryAcquireShared(int ignore) {
97 : jsr166 1.38 return isSignalled() ? 1 : -1;
98 : dl 1.1 }
99 : jsr166 1.22
100 : dl 1.12 public boolean tryReleaseShared(int ignore) {
101 :     setState(1);
102 :     return true;
103 : dl 1.1 }
104 :     }
105 :    
106 :     /**
107 : jsr166 1.28 * A runnable calling acquireInterruptibly that does not expect to
108 :     * be interrupted.
109 : dl 1.1 */
110 : jsr166 1.28 class InterruptibleSyncRunnable extends CheckedRunnable {
111 : dl 1.17 final Mutex sync;
112 : jsr166 1.41 InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
113 : jsr166 1.28 public void realRun() throws InterruptedException {
114 : jsr166 1.41 sync.acquireInterruptibly();
115 : dl 1.1 }
116 :     }
117 :    
118 :     /**
119 : dl 1.16 * A runnable calling acquireInterruptibly that expects to be
120 : jsr166 1.28 * interrupted.
121 : dl 1.1 */
122 : jsr166 1.28 class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
123 : dl 1.17 final Mutex sync;
124 : jsr166 1.41 InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
125 : jsr166 1.28 public void realRun() throws InterruptedException {
126 : jsr166 1.41 sync.acquireInterruptibly();
127 :     }
128 :     }
129 :    
130 :     /** A constant to clarify calls to checking methods below. */
131 : jsr166 1.43 static final Thread[] NO_THREADS = new Thread[0];
132 : jsr166 1.41
133 :     /**
134 :     * Spin-waits until sync.isQueued(t) becomes true.
135 :     */
136 :     void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) {
137 :     long startTime = System.nanoTime();
138 :     while (!sync.isQueued(t)) {
139 :     if (millisElapsedSince(startTime) > LONG_DELAY_MS)
140 :     throw new AssertionFailedError("timed out");
141 :     Thread.yield();
142 : dl 1.1 }
143 : jsr166 1.41 assertTrue(t.isAlive());
144 :     }
145 :    
146 :     /**
147 :     * Checks that sync has exactly the given queued threads.
148 :     */
149 :     void assertHasQueuedThreads(AbstractQueuedSynchronizer sync,
150 :     Thread... expected) {
151 :     Collection<Thread> actual = sync.getQueuedThreads();
152 :     assertEquals(expected.length > 0, sync.hasQueuedThreads());
153 :     assertEquals(expected.length, sync.getQueueLength());
154 :     assertEquals(expected.length, actual.size());
155 :     assertEquals(expected.length == 0, actual.isEmpty());
156 :     assertEquals(new HashSet<Thread>(actual),
157 :     new HashSet<Thread>(Arrays.asList(expected)));
158 :     }
159 :    
160 :     /**
161 :     * Checks that sync has exactly the given (exclusive) queued threads.
162 :     */
163 :     void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync,
164 :     Thread... expected) {
165 :     assertHasQueuedThreads(sync, expected);
166 :     assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()),
167 :     new HashSet<Thread>(sync.getQueuedThreads()));
168 :     assertEquals(0, sync.getSharedQueuedThreads().size());
169 :     assertTrue(sync.getSharedQueuedThreads().isEmpty());
170 :     }
171 :    
172 :     /**
173 :     * Checks that sync has exactly the given (shared) queued threads.
174 :     */
175 :     void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync,
176 :     Thread... expected) {
177 :     assertHasQueuedThreads(sync, expected);
178 :     assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()),
179 :     new HashSet<Thread>(sync.getQueuedThreads()));
180 :     assertEquals(0, sync.getExclusiveQueuedThreads().size());
181 :     assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
182 :     }
183 :    
184 :     /**
185 :     * Checks that condition c has exactly the given waiter threads,
186 :     * after acquiring mutex.
187 :     */
188 :     void assertHasWaitersUnlocked(Mutex sync, ConditionObject c,
189 :     Thread... threads) {
190 :     sync.acquire();
191 :     assertHasWaitersLocked(sync, c, threads);
192 :     sync.release();
193 :     }
194 :    
195 :     /**
196 :     * Checks that condition c has exactly the given waiter threads.
197 :     */
198 :     void assertHasWaitersLocked(Mutex sync, ConditionObject c,
199 :     Thread... threads) {
200 :     assertEquals(threads.length > 0, sync.hasWaiters(c));
201 :     assertEquals(threads.length, sync.getWaitQueueLength(c));
202 :     assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty());
203 :     assertEquals(threads.length, sync.getWaitingThreads(c).size());
204 :     assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)),
205 :     new HashSet<Thread>(Arrays.asList(threads)));
206 :     }
207 :    
208 : jsr166 1.46 enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
209 : jsr166 1.41
210 :     /**
211 :     * Awaits condition using the specified AwaitMethod.
212 :     */
213 :     void await(ConditionObject c, AwaitMethod awaitMethod)
214 :     throws InterruptedException {
215 :     long timeoutMillis = 2 * LONG_DELAY_MS;
216 :     switch (awaitMethod) {
217 :     case await:
218 :     c.await();
219 :     break;
220 :     case awaitTimed:
221 :     assertTrue(c.await(timeoutMillis, MILLISECONDS));
222 :     break;
223 :     case awaitNanos:
224 :     long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
225 :     long nanosRemaining = c.awaitNanos(nanosTimeout);
226 :     assertTrue(nanosRemaining > 0);
227 :     break;
228 :     case awaitUntil:
229 :     assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
230 :     break;
231 : jsr166 1.48 default:
232 :     throw new AssertionError();
233 : jsr166 1.41 }
234 :     }
235 :    
236 :     /**
237 :     * Checks that awaiting the given condition times out (using the
238 :     * default timeout duration).
239 :     */
240 :     void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
241 :     long timeoutMillis = timeoutMillis();
242 :     long startTime = System.nanoTime();
243 :     try {
244 :     switch (awaitMethod) {
245 :     case awaitTimed:
246 :     assertFalse(c.await(timeoutMillis, MILLISECONDS));
247 :     break;
248 :     case awaitNanos:
249 :     long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
250 :     long nanosRemaining = c.awaitNanos(nanosTimeout);
251 :     assertTrue(nanosRemaining <= 0);
252 :     break;
253 :     case awaitUntil:
254 :     assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
255 :     break;
256 :     default:
257 :     throw new UnsupportedOperationException();
258 :     }
259 :     } catch (InterruptedException ie) { threadUnexpectedException(ie); }
260 :     assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
261 : dl 1.1 }
262 : dl 1.16
263 :     /**
264 :     * isHeldExclusively is false upon construction
265 :     */
266 : jsr166 1.22 public void testIsHeldExclusively() {
267 : jsr166 1.41 Mutex sync = new Mutex();
268 :     assertFalse(sync.isHeldExclusively());
269 : dl 1.16 }
270 : jsr166 1.22
271 : dl 1.1 /**
272 : dl 1.17 * acquiring released sync succeeds
273 : dl 1.1 */
274 : jsr166 1.22 public void testAcquire() {
275 : jsr166 1.41 Mutex sync = new Mutex();
276 :     sync.acquire();
277 :     assertTrue(sync.isHeldExclusively());
278 :     sync.release();
279 :     assertFalse(sync.isHeldExclusively());
280 : dl 1.1 }
281 :    
282 :     /**
283 : jsr166 1.41 * tryAcquire on a released sync succeeds
284 : dl 1.1 */
285 : jsr166 1.22 public void testTryAcquire() {
286 : jsr166 1.41 Mutex sync = new Mutex();
287 :     assertTrue(sync.tryAcquire());
288 :     assertTrue(sync.isHeldExclusively());
289 :     sync.release();
290 :     assertFalse(sync.isHeldExclusively());
291 : dl 1.1 }
292 :    
293 :     /**
294 :     * hasQueuedThreads reports whether there are waiting threads
295 :     */
296 : jsr166 1.41 public void testHasQueuedThreads() {
297 : jsr166 1.29 final Mutex sync = new Mutex();
298 : jsr166 1.26 assertFalse(sync.hasQueuedThreads());
299 : jsr166 1.41 sync.acquire();
300 :     Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
301 :     waitForQueuedThread(sync, t1);
302 : jsr166 1.26 assertTrue(sync.hasQueuedThreads());
303 : jsr166 1.41 Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
304 :     waitForQueuedThread(sync, t2);
305 : jsr166 1.26 assertTrue(sync.hasQueuedThreads());
306 :     t1.interrupt();
307 : jsr166 1.41 awaitTermination(t1);
308 : jsr166 1.26 assertTrue(sync.hasQueuedThreads());
309 : jsr166 1.41 sync.release();
310 :     awaitTermination(t2);
311 : jsr166 1.26 assertFalse(sync.hasQueuedThreads());
312 : jsr166 1.22 }
313 : dl 1.10
314 :     /**
315 : jsr166 1.41 * isQueued(null) throws NullPointerException
316 : dl 1.11 */
317 : jsr166 1.22 public void testIsQueuedNPE() {
318 : jsr166 1.29 final Mutex sync = new Mutex();
319 : dl 1.11 try {
320 : dl 1.17 sync.isQueued(null);
321 : dl 1.11 shouldThrow();
322 : jsr166 1.26 } catch (NullPointerException success) {}
323 : dl 1.11 }
324 :    
325 :     /**
326 : jsr166 1.41 * isQueued reports whether a thread is queued
327 : dl 1.10 */
328 : jsr166 1.41 public void testIsQueued() {
329 : jsr166 1.29 final Mutex sync = new Mutex();
330 : dl 1.17 Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
331 :     Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
332 : jsr166 1.26 assertFalse(sync.isQueued(t1));
333 :     assertFalse(sync.isQueued(t2));
334 : jsr166 1.41 sync.acquire();
335 : jsr166 1.26 t1.start();
336 : jsr166 1.41 waitForQueuedThread(sync, t1);
337 : jsr166 1.26 assertTrue(sync.isQueued(t1));
338 : jsr166 1.41 assertFalse(sync.isQueued(t2));
339 : jsr166 1.26 t2.start();
340 : jsr166 1.41 waitForQueuedThread(sync, t2);
341 : jsr166 1.26 assertTrue(sync.isQueued(t1));
342 :     assertTrue(sync.isQueued(t2));
343 :     t1.interrupt();
344 : jsr166 1.41 awaitTermination(t1);
345 : jsr166 1.26 assertFalse(sync.isQueued(t1));
346 :     assertTrue(sync.isQueued(t2));
347 : jsr166 1.41 sync.release();
348 :     awaitTermination(t2);
349 : jsr166 1.26 assertFalse(sync.isQueued(t1));
350 :     assertFalse(sync.isQueued(t2));
351 : jsr166 1.22 }
352 : dl 1.8
353 : dl 1.12 /**
354 : dl 1.17 * getFirstQueuedThread returns first waiting thread or null if none
355 : dl 1.12 */
356 : jsr166 1.41 public void testGetFirstQueuedThread() {
357 : jsr166 1.29 final Mutex sync = new Mutex();
358 : jsr166 1.26 assertNull(sync.getFirstQueuedThread());
359 : jsr166 1.41 sync.acquire();
360 :     Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
361 :     waitForQueuedThread(sync, t1);
362 : jsr166 1.26 assertEquals(t1, sync.getFirstQueuedThread());
363 : jsr166 1.41 Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
364 :     waitForQueuedThread(sync, t2);
365 : jsr166 1.26 assertEquals(t1, sync.getFirstQueuedThread());
366 :     t1.interrupt();
367 : jsr166 1.41 awaitTermination(t1);
368 : jsr166 1.26 assertEquals(t2, sync.getFirstQueuedThread());
369 : jsr166 1.41 sync.release();
370 :     awaitTermination(t2);
371 : jsr166 1.26 assertNull(sync.getFirstQueuedThread());
372 : jsr166 1.22 }
373 : dl 1.12
374 : dl 1.8 /**
375 : dl 1.12 * hasContended reports false if no thread has ever blocked, else true
376 : dl 1.8 */
377 : jsr166 1.41 public void testHasContended() {
378 : jsr166 1.29 final Mutex sync = new Mutex();
379 : jsr166 1.26 assertFalse(sync.hasContended());
380 : jsr166 1.41 sync.acquire();
381 :     assertFalse(sync.hasContended());
382 :     Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
383 :     waitForQueuedThread(sync, t1);
384 : jsr166 1.26 assertTrue(sync.hasContended());
385 : jsr166 1.41 Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
386 :     waitForQueuedThread(sync, t2);
387 : jsr166 1.26 assertTrue(sync.hasContended());
388 :     t1.interrupt();
389 : jsr166 1.41 awaitTermination(t1);
390 : jsr166 1.26 assertTrue(sync.hasContended());
391 : jsr166 1.41 sync.release();
392 :     awaitTermination(t2);
393 : jsr166 1.26 assertTrue(sync.hasContended());
394 : jsr166 1.22 }
395 : dl 1.17
396 :     /**
397 : jsr166 1.41 * getQueuedThreads returns all waiting threads
398 : dl 1.17 */
399 : jsr166 1.41 public void testGetQueuedThreads() {
400 : jsr166 1.29 final Mutex sync = new Mutex();
401 : dl 1.17 Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
402 :     Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
403 : jsr166 1.41 assertHasExclusiveQueuedThreads(sync, NO_THREADS);
404 :     sync.acquire();
405 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
406 : jsr166 1.26 t1.start();
407 : jsr166 1.41 waitForQueuedThread(sync, t1);
408 :     assertHasExclusiveQueuedThreads(sync, t1);
409 : jsr166 1.26 assertTrue(sync.getQueuedThreads().contains(t1));
410 : jsr166 1.41 assertFalse(sync.getQueuedThreads().contains(t2));
411 : jsr166 1.26 t2.start();
412 : jsr166 1.41 waitForQueuedThread(sync, t2);
413 :     assertHasExclusiveQueuedThreads(sync, t1, t2);
414 : jsr166 1.26 assertTrue(sync.getQueuedThreads().contains(t1));
415 :     assertTrue(sync.getQueuedThreads().contains(t2));
416 :     t1.interrupt();
417 : jsr166 1.41 awaitTermination(t1);
418 :     assertHasExclusiveQueuedThreads(sync, t2);
419 :     sync.release();
420 :     awaitTermination(t2);
421 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
422 : jsr166 1.22 }
423 : dl 1.17
424 :     /**
425 : jsr166 1.41 * getExclusiveQueuedThreads returns all exclusive waiting threads
426 : dl 1.17 */
427 : jsr166 1.41 public void testGetExclusiveQueuedThreads() {
428 : jsr166 1.29 final Mutex sync = new Mutex();
429 : dl 1.17 Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
430 :     Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
431 : jsr166 1.41 assertHasExclusiveQueuedThreads(sync, NO_THREADS);
432 :     sync.acquire();
433 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
434 : jsr166 1.26 t1.start();
435 : jsr166 1.41 waitForQueuedThread(sync, t1);
436 :     assertHasExclusiveQueuedThreads(sync, t1);
437 : jsr166 1.26 assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
438 : jsr166 1.41 assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
439 : jsr166 1.26 t2.start();
440 : jsr166 1.41 waitForQueuedThread(sync, t2);
441 :     assertHasExclusiveQueuedThreads(sync, t1, t2);
442 : jsr166 1.26 assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
443 :     assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
444 :     t1.interrupt();
445 : jsr166 1.41 awaitTermination(t1);
446 :     assertHasExclusiveQueuedThreads(sync, t2);
447 :     sync.release();
448 :     awaitTermination(t2);
449 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
450 : jsr166 1.22 }
451 : dl 1.17
452 :     /**
453 :     * getSharedQueuedThreads does not include exclusively waiting threads
454 :     */
455 : jsr166 1.41 public void testGetSharedQueuedThreads_Exclusive() {
456 : jsr166 1.29 final Mutex sync = new Mutex();
457 : jsr166 1.26 assertTrue(sync.getSharedQueuedThreads().isEmpty());
458 : jsr166 1.41 sync.acquire();
459 : jsr166 1.26 assertTrue(sync.getSharedQueuedThreads().isEmpty());
460 : jsr166 1.41 Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
461 :     waitForQueuedThread(sync, t1);
462 : jsr166 1.26 assertTrue(sync.getSharedQueuedThreads().isEmpty());
463 : jsr166 1.41 Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
464 :     waitForQueuedThread(sync, t2);
465 : jsr166 1.26 assertTrue(sync.getSharedQueuedThreads().isEmpty());
466 :     t1.interrupt();
467 : jsr166 1.41 awaitTermination(t1);
468 : jsr166 1.26 assertTrue(sync.getSharedQueuedThreads().isEmpty());
469 : jsr166 1.41 sync.release();
470 :     awaitTermination(t2);
471 : jsr166 1.26 assertTrue(sync.getSharedQueuedThreads().isEmpty());
472 : jsr166 1.22 }
473 : dl 1.1
474 :     /**
475 : jsr166 1.41 * getSharedQueuedThreads returns all shared waiting threads
476 :     */
477 :     public void testGetSharedQueuedThreads_Shared() {
478 :     final BooleanLatch l = new BooleanLatch();
479 :     assertHasSharedQueuedThreads(l, NO_THREADS);
480 :     Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
481 :     public void realRun() throws InterruptedException {
482 :     l.acquireSharedInterruptibly(0);
483 :     }});
484 :     waitForQueuedThread(l, t1);
485 :     assertHasSharedQueuedThreads(l, t1);
486 :     Thread t2 = newStartedThread(new CheckedRunnable() {
487 :     public void realRun() throws InterruptedException {
488 :     l.acquireSharedInterruptibly(0);
489 :     }});
490 :     waitForQueuedThread(l, t2);
491 :     assertHasSharedQueuedThreads(l, t1, t2);
492 :     t1.interrupt();
493 :     awaitTermination(t1);
494 :     assertHasSharedQueuedThreads(l, t2);
495 :     assertTrue(l.releaseShared(0));
496 :     awaitTermination(t2);
497 :     assertHasSharedQueuedThreads(l, NO_THREADS);
498 :     }
499 :    
500 :     /**
501 :     * tryAcquireNanos is interruptible
502 : dl 1.1 */
503 : jsr166 1.41 public void testTryAcquireNanos_Interruptible() {
504 : jsr166 1.29 final Mutex sync = new Mutex();
505 : jsr166 1.41 sync.acquire();
506 :     Thread t = newStartedThread(new CheckedInterruptedRunnable() {
507 : jsr166 1.28 public void realRun() throws InterruptedException {
508 : jsr166 1.41 sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
509 : jsr166 1.28 }});
510 : jsr166 1.26
511 : jsr166 1.41 waitForQueuedThread(sync, t);
512 : jsr166 1.26 t.interrupt();
513 : jsr166 1.41 awaitTermination(t);
514 : dl 1.1 }
515 :    
516 :     /**
517 : jsr166 1.41 * tryAcquire on exclusively held sync fails
518 : dl 1.1 */
519 : jsr166 1.41 public void testTryAcquireWhenSynced() {
520 : jsr166 1.29 final Mutex sync = new Mutex();
521 : jsr166 1.41 sync.acquire();
522 :     Thread t = newStartedThread(new CheckedRunnable() {
523 : jsr166 1.28 public void realRun() {
524 : jsr166 1.41 assertFalse(sync.tryAcquire());
525 : jsr166 1.28 }});
526 : jsr166 1.26
527 : jsr166 1.41 awaitTermination(t);
528 :     sync.release();
529 : jsr166 1.22 }
530 : dl 1.1
531 :     /**
532 : dl 1.17 * tryAcquireNanos on an exclusively held sync times out
533 : dl 1.1 */
534 : jsr166 1.41 public void testAcquireNanos_Timeout() {
535 : jsr166 1.29 final Mutex sync = new Mutex();
536 : jsr166 1.41 sync.acquire();
537 :     Thread t = newStartedThread(new CheckedRunnable() {
538 : jsr166 1.28 public void realRun() throws InterruptedException {
539 : jsr166 1.41 long startTime = System.nanoTime();
540 :     long nanos = MILLISECONDS.toNanos(timeoutMillis());
541 :     assertFalse(sync.tryAcquireNanos(nanos));
542 :     assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
543 : jsr166 1.28 }});
544 : jsr166 1.26
545 : jsr166 1.41 awaitTermination(t);
546 :     sync.release();
547 : jsr166 1.22 }
548 :    
549 : dl 1.1 /**
550 : dl 1.13 * getState is true when acquired and false when not
551 : dl 1.1 */
552 : jsr166 1.41 public void testGetState() {
553 : jsr166 1.29 final Mutex sync = new Mutex();
554 : jsr166 1.41 sync.acquire();
555 : jsr166 1.29 assertTrue(sync.isHeldExclusively());
556 : jsr166 1.41 sync.release();
557 : jsr166 1.29 assertFalse(sync.isHeldExclusively());
558 : jsr166 1.41
559 :     final BooleanLatch acquired = new BooleanLatch();
560 :     final BooleanLatch done = new BooleanLatch();
561 :     Thread t = newStartedThread(new CheckedRunnable() {
562 : jsr166 1.28 public void realRun() throws InterruptedException {
563 : jsr166 1.41 sync.acquire();
564 :     assertTrue(acquired.releaseShared(0));
565 :     done.acquireShared(0);
566 :     sync.release();
567 : jsr166 1.28 }});
568 : jsr166 1.26
569 : jsr166 1.41 acquired.acquireShared(0);
570 : jsr166 1.26 assertTrue(sync.isHeldExclusively());
571 : jsr166 1.41 assertTrue(done.releaseShared(0));
572 :     awaitTermination(t);
573 : jsr166 1.26 assertFalse(sync.isHeldExclusively());
574 : dl 1.1 }
575 :    
576 :     /**
577 : jsr166 1.41 * acquireInterruptibly succeeds when released, else is interruptible
578 : dl 1.1 */
579 : jsr166 1.41 public void testAcquireInterruptibly() throws InterruptedException {
580 : jsr166 1.29 final Mutex sync = new Mutex();
581 : jsr166 1.41 final BooleanLatch threadStarted = new BooleanLatch();
582 :     sync.acquireInterruptibly();
583 :     Thread t = newStartedThread(new CheckedInterruptedRunnable() {
584 :     public void realRun() throws InterruptedException {
585 :     assertTrue(threadStarted.releaseShared(0));
586 :     sync.acquireInterruptibly();
587 :     }});
588 : jsr166 1.26
589 : jsr166 1.41 threadStarted.acquireShared(0);
590 :     waitForQueuedThread(sync, t);
591 : jsr166 1.26 t.interrupt();
592 : jsr166 1.41 awaitTermination(t);
593 : jsr166 1.26 assertTrue(sync.isHeldExclusively());
594 : dl 1.1 }
595 :    
596 :     /**
597 : dl 1.17 * owns is true for a condition created by sync else false
598 : dl 1.12 */
599 :     public void testOwns() {
600 : jsr166 1.29 final Mutex sync = new Mutex();
601 : jsr166 1.41 final ConditionObject c = sync.newCondition();
602 : dl 1.17 final Mutex sync2 = new Mutex();
603 :     assertTrue(sync.owns(c));
604 :     assertFalse(sync2.owns(c));
605 : dl 1.12 }
606 :    
607 :     /**
608 : dl 1.17 * Calling await without holding sync throws IllegalMonitorStateException
609 : dl 1.1 */
610 : jsr166 1.41 public void testAwait_IMSE() {
611 : jsr166 1.29 final Mutex sync = new Mutex();
612 : jsr166 1.41 final ConditionObject c = sync.newCondition();
613 :     for (AwaitMethod awaitMethod : AwaitMethod.values()) {
614 :     long startTime = System.nanoTime();
615 :     try {
616 :     await(c, awaitMethod);
617 :     shouldThrow();
618 :     } catch (IllegalMonitorStateException success) {
619 :     } catch (InterruptedException e) { threadUnexpectedException(e); }
620 :     assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
621 :     }
622 : dl 1.1 }
623 :    
624 :     /**
625 : dl 1.17 * Calling signal without holding sync throws IllegalMonitorStateException
626 : dl 1.1 */
627 : jsr166 1.41 public void testSignal_IMSE() {
628 : jsr166 1.29 final Mutex sync = new Mutex();
629 : jsr166 1.41 final ConditionObject c = sync.newCondition();
630 : dl 1.1 try {
631 :     c.signal();
632 :     shouldThrow();
633 : jsr166 1.28 } catch (IllegalMonitorStateException success) {}
634 : jsr166 1.41 assertHasWaitersUnlocked(sync, c, NO_THREADS);
635 : dl 1.1 }
636 :    
637 :     /**
638 : jsr166 1.41 * Calling signalAll without holding sync throws IllegalMonitorStateException
639 : dl 1.1 */
640 : jsr166 1.41 public void testSignalAll_IMSE() {
641 : jsr166 1.29 final Mutex sync = new Mutex();
642 : jsr166 1.41 final ConditionObject c = sync.newCondition();
643 :     try {
644 :     c.signalAll();
645 :     shouldThrow();
646 :     } catch (IllegalMonitorStateException success) {}
647 : dl 1.1 }
648 :    
649 :     /**
650 : jsr166 1.41 * await/awaitNanos/awaitUntil without a signal times out
651 : dl 1.1 */
652 : jsr166 1.41 public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
653 :     public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
654 :     public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
655 :     public void testAwait_Timeout(AwaitMethod awaitMethod) {
656 : jsr166 1.29 final Mutex sync = new Mutex();
657 : jsr166 1.41 final ConditionObject c = sync.newCondition();
658 :     sync.acquire();
659 :     assertAwaitTimesOut(c, awaitMethod);
660 :     sync.release();
661 : dl 1.1 }
662 :    
663 :     /**
664 : jsr166 1.41 * await/awaitNanos/awaitUntil returns when signalled
665 : dl 1.1 */
666 : jsr166 1.41 public void testSignal_await() { testSignal(AwaitMethod.await); }
667 :     public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
668 :     public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
669 :     public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
670 :     public void testSignal(final AwaitMethod awaitMethod) {
671 : jsr166 1.29 final Mutex sync = new Mutex();
672 : jsr166 1.41 final ConditionObject c = sync.newCondition();
673 :     final BooleanLatch acquired = new BooleanLatch();
674 :     Thread t = newStartedThread(new CheckedRunnable() {
675 : jsr166 1.28 public void realRun() throws InterruptedException {
676 : jsr166 1.41 sync.acquire();
677 :     assertTrue(acquired.releaseShared(0));
678 :     await(c, awaitMethod);
679 :     sync.release();
680 : jsr166 1.28 }});
681 : dl 1.15
682 : jsr166 1.41 acquired.acquireShared(0);
683 :     sync.acquire();
684 :     assertHasWaitersLocked(sync, c, t);
685 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
686 : jsr166 1.26 c.signal();
687 : jsr166 1.41 assertHasWaitersLocked(sync, c, NO_THREADS);
688 :     assertHasExclusiveQueuedThreads(sync, t);
689 :     sync.release();
690 :     awaitTermination(t);
691 : dl 1.15 }
692 :    
693 :     /**
694 : jsr166 1.41 * hasWaiters(null) throws NullPointerException
695 : dl 1.15 */
696 :     public void testHasWaitersNPE() {
697 : jsr166 1.29 final Mutex sync = new Mutex();
698 : dl 1.15 try {
699 : dl 1.17 sync.hasWaiters(null);
700 : dl 1.15 shouldThrow();
701 : jsr166 1.26 } catch (NullPointerException success) {}
702 : dl 1.15 }
703 :    
704 :     /**
705 : jsr166 1.41 * getWaitQueueLength(null) throws NullPointerException
706 : dl 1.15 */
707 :     public void testGetWaitQueueLengthNPE() {
708 : jsr166 1.29 final Mutex sync = new Mutex();
709 : dl 1.15 try {
710 : dl 1.17 sync.getWaitQueueLength(null);
711 : dl 1.15 shouldThrow();
712 : jsr166 1.26 } catch (NullPointerException success) {}
713 : dl 1.15 }
714 :    
715 :     /**
716 : jsr166 1.41 * getWaitingThreads(null) throws NullPointerException
717 : dl 1.15 */
718 :     public void testGetWaitingThreadsNPE() {
719 : jsr166 1.29 final Mutex sync = new Mutex();
720 : dl 1.15 try {
721 : dl 1.17 sync.getWaitingThreads(null);
722 : dl 1.15 shouldThrow();
723 : jsr166 1.26 } catch (NullPointerException success) {}
724 : dl 1.15 }
725 :    
726 :     /**
727 : jsr166 1.41 * hasWaiters throws IllegalArgumentException if not owned
728 : dl 1.15 */
729 :     public void testHasWaitersIAE() {
730 : jsr166 1.29 final Mutex sync = new Mutex();
731 : jsr166 1.41 final ConditionObject c = sync.newCondition();
732 : jsr166 1.29 final Mutex sync2 = new Mutex();
733 : dl 1.15 try {
734 : dl 1.17 sync2.hasWaiters(c);
735 : dl 1.15 shouldThrow();
736 : jsr166 1.26 } catch (IllegalArgumentException success) {}
737 : jsr166 1.41 assertHasWaitersUnlocked(sync, c, NO_THREADS);
738 : dl 1.15 }
739 :    
740 :     /**
741 : jsr166 1.41 * hasWaiters throws IllegalMonitorStateException if not synced
742 : dl 1.15 */
743 :     public void testHasWaitersIMSE() {
744 : jsr166 1.29 final Mutex sync = new Mutex();
745 : jsr166 1.41 final ConditionObject c = sync.newCondition();
746 : dl 1.15 try {
747 : dl 1.17 sync.hasWaiters(c);
748 : dl 1.15 shouldThrow();
749 : jsr166 1.26 } catch (IllegalMonitorStateException success) {}
750 : jsr166 1.41 assertHasWaitersUnlocked(sync, c, NO_THREADS);
751 : dl 1.15 }
752 :    
753 :     /**
754 : jsr166 1.41 * getWaitQueueLength throws IllegalArgumentException if not owned
755 : dl 1.15 */
756 :     public void testGetWaitQueueLengthIAE() {
757 : jsr166 1.29 final Mutex sync = new Mutex();
758 : jsr166 1.41 final ConditionObject c = sync.newCondition();
759 : jsr166 1.29 final Mutex sync2 = new Mutex();
760 : dl 1.15 try {
761 : dl 1.17 sync2.getWaitQueueLength(c);
762 : dl 1.15 shouldThrow();
763 : jsr166 1.26 } catch (IllegalArgumentException success) {}
764 : jsr166 1.41 assertHasWaitersUnlocked(sync, c, NO_THREADS);
765 : dl 1.15 }
766 :    
767 :     /**
768 : jsr166 1.41 * getWaitQueueLength throws IllegalMonitorStateException if not synced
769 : dl 1.15 */
770 :     public void testGetWaitQueueLengthIMSE() {
771 : jsr166 1.29 final Mutex sync = new Mutex();
772 : jsr166 1.41 final ConditionObject c = sync.newCondition();
773 : dl 1.15 try {
774 : dl 1.17 sync.getWaitQueueLength(c);
775 : dl 1.15 shouldThrow();
776 : jsr166 1.26 } catch (IllegalMonitorStateException success) {}
777 : jsr166 1.41 assertHasWaitersUnlocked(sync, c, NO_THREADS);
778 : dl 1.15 }
779 :    
780 :     /**
781 : jsr166 1.41 * getWaitingThreads throws IllegalArgumentException if not owned
782 : dl 1.15 */
783 :     public void testGetWaitingThreadsIAE() {
784 : jsr166 1.29 final Mutex sync = new Mutex();
785 : jsr166 1.41 final ConditionObject c = sync.newCondition();
786 : jsr166 1.29 final Mutex sync2 = new Mutex();
787 : dl 1.15 try {
788 : dl 1.17 sync2.getWaitingThreads(c);
789 : dl 1.15 shouldThrow();
790 : jsr166 1.26 } catch (IllegalArgumentException success) {}
791 : jsr166 1.41 assertHasWaitersUnlocked(sync, c, NO_THREADS);
792 : dl 1.15 }
793 :    
794 :     /**
795 : jsr166 1.41 * getWaitingThreads throws IllegalMonitorStateException if not synced
796 : dl 1.15 */
797 :     public void testGetWaitingThreadsIMSE() {
798 : jsr166 1.29 final Mutex sync = new Mutex();
799 : jsr166 1.41 final ConditionObject c = sync.newCondition();
800 : dl 1.15 try {
801 : dl 1.17 sync.getWaitingThreads(c);
802 : dl 1.15 shouldThrow();
803 : jsr166 1.26 } catch (IllegalMonitorStateException success) {}
804 : jsr166 1.41 assertHasWaitersUnlocked(sync, c, NO_THREADS);
805 : dl 1.15 }
806 :    
807 :     /**
808 :     * hasWaiters returns true when a thread is waiting, else false
809 :     */
810 : jsr166 1.41 public void testHasWaiters() {
811 : jsr166 1.29 final Mutex sync = new Mutex();
812 : jsr166 1.41 final ConditionObject c = sync.newCondition();
813 :     final BooleanLatch acquired = new BooleanLatch();
814 :     Thread t = newStartedThread(new CheckedRunnable() {
815 : jsr166 1.28 public void realRun() throws InterruptedException {
816 : jsr166 1.41 sync.acquire();
817 :     assertHasWaitersLocked(sync, c, NO_THREADS);
818 : jsr166 1.35 assertFalse(sync.hasWaiters(c));
819 : jsr166 1.41 assertTrue(acquired.releaseShared(0));
820 : jsr166 1.28 c.await();
821 : jsr166 1.41 sync.release();
822 : jsr166 1.28 }});
823 : dl 1.15
824 : jsr166 1.41 acquired.acquireShared(0);
825 :     sync.acquire();
826 :     assertHasWaitersLocked(sync, c, t);
827 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
828 : jsr166 1.26 assertTrue(sync.hasWaiters(c));
829 :     c.signal();
830 : jsr166 1.41 assertHasWaitersLocked(sync, c, NO_THREADS);
831 :     assertHasExclusiveQueuedThreads(sync, t);
832 : jsr166 1.26 assertFalse(sync.hasWaiters(c));
833 : jsr166 1.41 sync.release();
834 :    
835 :     awaitTermination(t);
836 :     assertHasWaitersUnlocked(sync, c, NO_THREADS);
837 : dl 1.15 }
838 :    
839 :     /**
840 :     * getWaitQueueLength returns number of waiting threads
841 :     */
842 : jsr166 1.41 public void testGetWaitQueueLength() {
843 : jsr166 1.29 final Mutex sync = new Mutex();
844 : jsr166 1.41 final ConditionObject c = sync.newCondition();
845 :     final BooleanLatch acquired1 = new BooleanLatch();
846 :     final BooleanLatch acquired2 = new BooleanLatch();
847 :     final Thread t1 = newStartedThread(new CheckedRunnable() {
848 : jsr166 1.28 public void realRun() throws InterruptedException {
849 : jsr166 1.41 sync.acquire();
850 :     assertHasWaitersLocked(sync, c, NO_THREADS);
851 : jsr166 1.35 assertEquals(0, sync.getWaitQueueLength(c));
852 : jsr166 1.41 assertTrue(acquired1.releaseShared(0));
853 : jsr166 1.28 c.await();
854 : jsr166 1.41 sync.release();
855 : jsr166 1.28 }});
856 : jsr166 1.41 acquired1.acquireShared(0);
857 :     sync.acquire();
858 :     assertHasWaitersLocked(sync, c, t1);
859 :     assertEquals(1, sync.getWaitQueueLength(c));
860 :     sync.release();
861 : jsr166 1.28
862 : jsr166 1.41 final Thread t2 = newStartedThread(new CheckedRunnable() {
863 : jsr166 1.28 public void realRun() throws InterruptedException {
864 : jsr166 1.41 sync.acquire();
865 :     assertHasWaitersLocked(sync, c, t1);
866 : jsr166 1.35 assertEquals(1, sync.getWaitQueueLength(c));
867 : jsr166 1.41 assertTrue(acquired2.releaseShared(0));
868 : jsr166 1.28 c.await();
869 : jsr166 1.41 sync.release();
870 : jsr166 1.28 }});
871 : jsr166 1.41 acquired2.acquireShared(0);
872 :     sync.acquire();
873 :     assertHasWaitersLocked(sync, c, t1, t2);
874 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
875 : jsr166 1.26 assertEquals(2, sync.getWaitQueueLength(c));
876 :     c.signalAll();
877 : jsr166 1.41 assertHasWaitersLocked(sync, c, NO_THREADS);
878 :     assertHasExclusiveQueuedThreads(sync, t1, t2);
879 : jsr166 1.26 assertEquals(0, sync.getWaitQueueLength(c));
880 : jsr166 1.41 sync.release();
881 :    
882 :     awaitTermination(t1);
883 :     awaitTermination(t2);
884 :     assertHasWaitersUnlocked(sync, c, NO_THREADS);
885 : dl 1.15 }
886 :    
887 :     /**
888 :     * getWaitingThreads returns only and all waiting threads
889 :     */
890 : jsr166 1.41 public void testGetWaitingThreads() {
891 : jsr166 1.29 final Mutex sync = new Mutex();
892 : jsr166 1.41 final ConditionObject c = sync.newCondition();
893 :     final BooleanLatch acquired1 = new BooleanLatch();
894 :     final BooleanLatch acquired2 = new BooleanLatch();
895 :     final Thread t1 = new Thread(new CheckedRunnable() {
896 : jsr166 1.28 public void realRun() throws InterruptedException {
897 : jsr166 1.41 sync.acquire();
898 :     assertHasWaitersLocked(sync, c, NO_THREADS);
899 : jsr166 1.35 assertTrue(sync.getWaitingThreads(c).isEmpty());
900 : jsr166 1.41 assertTrue(acquired1.releaseShared(0));
901 : jsr166 1.28 c.await();
902 : jsr166 1.41 sync.release();
903 : jsr166 1.28 }});
904 :    
905 : jsr166 1.41 final Thread t2 = new Thread(new CheckedRunnable() {
906 : jsr166 1.28 public void realRun() throws InterruptedException {
907 : jsr166 1.41 sync.acquire();
908 :     assertHasWaitersLocked(sync, c, t1);
909 :     assertTrue(sync.getWaitingThreads(c).contains(t1));
910 : jsr166 1.35 assertFalse(sync.getWaitingThreads(c).isEmpty());
911 : jsr166 1.41 assertEquals(1, sync.getWaitingThreads(c).size());
912 :     assertTrue(acquired2.releaseShared(0));
913 : jsr166 1.28 c.await();
914 : jsr166 1.41 sync.release();
915 : jsr166 1.28 }});
916 : dl 1.1
917 : jsr166 1.41 sync.acquire();
918 :     assertHasWaitersLocked(sync, c, NO_THREADS);
919 :     assertFalse(sync.getWaitingThreads(c).contains(t1));
920 :     assertFalse(sync.getWaitingThreads(c).contains(t2));
921 : jsr166 1.26 assertTrue(sync.getWaitingThreads(c).isEmpty());
922 : jsr166 1.41 assertEquals(0, sync.getWaitingThreads(c).size());
923 :     sync.release();
924 :    
925 : jsr166 1.26 t1.start();
926 : jsr166 1.41 acquired1.acquireShared(0);
927 :     sync.acquire();
928 :     assertHasWaitersLocked(sync, c, t1);
929 :     assertTrue(sync.getWaitingThreads(c).contains(t1));
930 :     assertFalse(sync.getWaitingThreads(c).contains(t2));
931 :     assertFalse(sync.getWaitingThreads(c).isEmpty());
932 :     assertEquals(1, sync.getWaitingThreads(c).size());
933 :     sync.release();
934 :    
935 : jsr166 1.26 t2.start();
936 : jsr166 1.41 acquired2.acquireShared(0);
937 :     sync.acquire();
938 :     assertHasWaitersLocked(sync, c, t1, t2);
939 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
940 : jsr166 1.26 assertTrue(sync.getWaitingThreads(c).contains(t1));
941 :     assertTrue(sync.getWaitingThreads(c).contains(t2));
942 : jsr166 1.41 assertFalse(sync.getWaitingThreads(c).isEmpty());
943 :     assertEquals(2, sync.getWaitingThreads(c).size());
944 : jsr166 1.26 c.signalAll();
945 : jsr166 1.41 assertHasWaitersLocked(sync, c, NO_THREADS);
946 :     assertHasExclusiveQueuedThreads(sync, t1, t2);
947 :     assertFalse(sync.getWaitingThreads(c).contains(t1));
948 :     assertFalse(sync.getWaitingThreads(c).contains(t2));
949 : jsr166 1.26 assertTrue(sync.getWaitingThreads(c).isEmpty());
950 : jsr166 1.41 assertEquals(0, sync.getWaitingThreads(c).size());
951 :     sync.release();
952 :    
953 :     awaitTermination(t1);
954 :     awaitTermination(t2);
955 :     assertHasWaitersUnlocked(sync, c, NO_THREADS);
956 : dl 1.15 }
957 :    
958 :     /**
959 : jsr166 1.42 * awaitUninterruptibly is uninterruptible
960 : dl 1.15 */
961 : jsr166 1.41 public void testAwaitUninterruptibly() {
962 : jsr166 1.29 final Mutex sync = new Mutex();
963 : jsr166 1.41 final ConditionObject c = sync.newCondition();
964 : jsr166 1.42 final BooleanLatch pleaseInterrupt = new BooleanLatch();
965 : jsr166 1.41 Thread t = newStartedThread(new CheckedRunnable() {
966 : jsr166 1.28 public void realRun() {
967 : jsr166 1.41 sync.acquire();
968 : jsr166 1.42 assertTrue(pleaseInterrupt.releaseShared(0));
969 : jsr166 1.28 c.awaitUninterruptibly();
970 : jsr166 1.41 assertTrue(Thread.interrupted());
971 :     assertHasWaitersLocked(sync, c, NO_THREADS);
972 :     sync.release();
973 : jsr166 1.28 }});
974 : dl 1.15
975 : jsr166 1.42 pleaseInterrupt.acquireShared(0);
976 : jsr166 1.41 sync.acquire();
977 :     assertHasWaitersLocked(sync, c, t);
978 :     sync.release();
979 : jsr166 1.26 t.interrupt();
980 : jsr166 1.41 assertHasWaitersUnlocked(sync, c, t);
981 :     assertThreadStaysAlive(t);
982 :     sync.acquire();
983 :     assertHasWaitersLocked(sync, c, t);
984 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
985 : jsr166 1.26 c.signal();
986 : jsr166 1.41 assertHasWaitersLocked(sync, c, NO_THREADS);
987 :     assertHasExclusiveQueuedThreads(sync, t);
988 :     sync.release();
989 :     awaitTermination(t);
990 : dl 1.15 }
991 :    
992 :     /**
993 : jsr166 1.41 * await/awaitNanos/awaitUntil is interruptible
994 : dl 1.15 */
995 : jsr166 1.41 public void testInterruptible_await() { testInterruptible(AwaitMethod.await); }
996 :     public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
997 :     public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
998 :     public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
999 :     public void testInterruptible(final AwaitMethod awaitMethod) {
1000 : jsr166 1.29 final Mutex sync = new Mutex();
1001 : jsr166 1.41 final ConditionObject c = sync.newCondition();
1002 : jsr166 1.42 final BooleanLatch pleaseInterrupt = new BooleanLatch();
1003 : jsr166 1.41 Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1004 : jsr166 1.29 public void realRun() throws InterruptedException {
1005 : jsr166 1.41 sync.acquire();
1006 : jsr166 1.42 assertTrue(pleaseInterrupt.releaseShared(0));
1007 : jsr166 1.41 await(c, awaitMethod);
1008 : jsr166 1.28 }});
1009 : dl 1.15
1010 : jsr166 1.42 pleaseInterrupt.acquireShared(0);
1011 : jsr166 1.26 t.interrupt();
1012 : jsr166 1.41 awaitTermination(t);
1013 : dl 1.12 }
1014 :    
1015 : dl 1.14 /**
1016 : dl 1.15 * signalAll wakes up all threads
1017 :     */
1018 : jsr166 1.41 public void testSignalAll_await() { testSignalAll(AwaitMethod.await); }
1019 :     public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1020 :     public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1021 :     public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1022 :     public void testSignalAll(final AwaitMethod awaitMethod) {
1023 :     final Mutex sync = new Mutex();
1024 :     final ConditionObject c = sync.newCondition();
1025 :     final BooleanLatch acquired1 = new BooleanLatch();
1026 :     final BooleanLatch acquired2 = new BooleanLatch();
1027 :     Thread t1 = newStartedThread(new CheckedRunnable() {
1028 : jsr166 1.28 public void realRun() throws InterruptedException {
1029 : jsr166 1.41 sync.acquire();
1030 :     acquired1.releaseShared(0);
1031 :     await(c, awaitMethod);
1032 :     sync.release();
1033 : jsr166 1.28 }});
1034 :    
1035 : jsr166 1.41 Thread t2 = newStartedThread(new CheckedRunnable() {
1036 : jsr166 1.28 public void realRun() throws InterruptedException {
1037 : jsr166 1.41 sync.acquire();
1038 :     acquired2.releaseShared(0);
1039 :     await(c, awaitMethod);
1040 :     sync.release();
1041 : jsr166 1.28 }});
1042 : dl 1.15
1043 : jsr166 1.41 acquired1.acquireShared(0);
1044 :     acquired2.acquireShared(0);
1045 :     sync.acquire();
1046 :     assertHasWaitersLocked(sync, c, t1, t2);
1047 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1048 : jsr166 1.26 c.signalAll();
1049 : jsr166 1.41 assertHasWaitersLocked(sync, c, NO_THREADS);
1050 :     assertHasExclusiveQueuedThreads(sync, t1, t2);
1051 :     sync.release();
1052 :     awaitTermination(t1);
1053 :     awaitTermination(t2);
1054 : dl 1.15 }
1055 :    
1056 :     /**
1057 : dl 1.14 * toString indicates current state
1058 :     */
1059 :     public void testToString() {
1060 : dl 1.17 Mutex sync = new Mutex();
1061 : jsr166 1.41 assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1062 :     sync.acquire();
1063 :     assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1064 : dl 1.14 }
1065 :    
1066 :     /**
1067 : jsr166 1.41 * A serialized AQS deserializes with current state, but no queued threads
1068 :     */
1069 :     public void testSerialization() {
1070 :     Mutex sync = new Mutex();
1071 :     assertFalse(serialClone(sync).isHeldExclusively());
1072 :     sync.acquire();
1073 :     Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1074 :     waitForQueuedThread(sync, t);
1075 :     assertTrue(sync.isHeldExclusively());
1076 :    
1077 :     Mutex clone = serialClone(sync);
1078 :     assertTrue(clone.isHeldExclusively());
1079 :     assertHasExclusiveQueuedThreads(sync, t);
1080 :     assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1081 :     t.interrupt();
1082 :     awaitTermination(t);
1083 :     sync.release();
1084 :     assertFalse(sync.isHeldExclusively());
1085 :     assertTrue(clone.isHeldExclusively());
1086 :     assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1087 :     assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1088 : dl 1.14 }
1089 :    
1090 : dl 1.12 /**
1091 : dl 1.15 * tryReleaseShared setting state changes getState
1092 : dl 1.12 */
1093 : dl 1.15 public void testGetStateWithReleaseShared() {
1094 : jsr166 1.29 final BooleanLatch l = new BooleanLatch();
1095 :     assertFalse(l.isSignalled());
1096 : jsr166 1.41 assertTrue(l.releaseShared(0));
1097 : jsr166 1.29 assertTrue(l.isSignalled());
1098 : dl 1.12 }
1099 :    
1100 :     /**
1101 : dl 1.17 * releaseShared has no effect when already signalled
1102 : dl 1.12 */
1103 : dl 1.13 public void testReleaseShared() {
1104 : jsr166 1.29 final BooleanLatch l = new BooleanLatch();
1105 :     assertFalse(l.isSignalled());
1106 : jsr166 1.41 assertTrue(l.releaseShared(0));
1107 : jsr166 1.29 assertTrue(l.isSignalled());
1108 : jsr166 1.41 assertTrue(l.releaseShared(0));
1109 : jsr166 1.29 assertTrue(l.isSignalled());
1110 : dl 1.12 }
1111 :    
1112 :     /**
1113 :     * acquireSharedInterruptibly returns after release, but not before
1114 :     */
1115 : jsr166 1.41 public void testAcquireSharedInterruptibly() {
1116 : jsr166 1.29 final BooleanLatch l = new BooleanLatch();
1117 : dl 1.12
1118 : jsr166 1.41 Thread t = newStartedThread(new CheckedRunnable() {
1119 : jsr166 1.28 public void realRun() throws InterruptedException {
1120 : jsr166 1.35 assertFalse(l.isSignalled());
1121 : jsr166 1.28 l.acquireSharedInterruptibly(0);
1122 : jsr166 1.35 assertTrue(l.isSignalled());
1123 : jsr166 1.41 l.acquireSharedInterruptibly(0);
1124 :     assertTrue(l.isSignalled());
1125 : jsr166 1.28 }});
1126 : jsr166 1.26
1127 : jsr166 1.41 waitForQueuedThread(l, t);
1128 : jsr166 1.26 assertFalse(l.isSignalled());
1129 : jsr166 1.41 assertThreadStaysAlive(t);
1130 :     assertHasSharedQueuedThreads(l, t);
1131 :     assertTrue(l.releaseShared(0));
1132 : jsr166 1.26 assertTrue(l.isSignalled());
1133 : jsr166 1.41 awaitTermination(t);
1134 : dl 1.12 }
1135 : jsr166 1.22
1136 : dl 1.12 /**
1137 : jsr166 1.41 * tryAcquireSharedNanos returns after release, but not before
1138 : dl 1.12 */
1139 : jsr166 1.41 public void testTryAcquireSharedNanos() {
1140 : jsr166 1.29 final BooleanLatch l = new BooleanLatch();
1141 : dl 1.12
1142 : jsr166 1.41 Thread t = newStartedThread(new CheckedRunnable() {
1143 : jsr166 1.28 public void realRun() throws InterruptedException {
1144 : jsr166 1.33 assertFalse(l.isSignalled());
1145 : jsr166 1.41 long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1146 :     assertTrue(l.tryAcquireSharedNanos(0, nanos));
1147 :     assertTrue(l.isSignalled());
1148 : jsr166 1.33 assertTrue(l.tryAcquireSharedNanos(0, nanos));
1149 :     assertTrue(l.isSignalled());
1150 : jsr166 1.28 }});
1151 : jsr166 1.26
1152 : jsr166 1.41 waitForQueuedThread(l, t);
1153 : jsr166 1.26 assertFalse(l.isSignalled());
1154 : jsr166 1.41 assertThreadStaysAlive(t);
1155 :     assertTrue(l.releaseShared(0));
1156 : jsr166 1.26 assertTrue(l.isSignalled());
1157 : jsr166 1.41 awaitTermination(t);
1158 : dl 1.12 }
1159 : jsr166 1.22
1160 : dl 1.12 /**
1161 : jsr166 1.41 * acquireSharedInterruptibly is interruptible
1162 : dl 1.12 */
1163 : jsr166 1.41 public void testAcquireSharedInterruptibly_Interruptible() {
1164 : dl 1.12 final BooleanLatch l = new BooleanLatch();
1165 : jsr166 1.41 Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1166 : jsr166 1.29 public void realRun() throws InterruptedException {
1167 : jsr166 1.35 assertFalse(l.isSignalled());
1168 : jsr166 1.28 l.acquireSharedInterruptibly(0);
1169 :     }});
1170 :    
1171 : jsr166 1.41 waitForQueuedThread(l, t);
1172 : jsr166 1.26 assertFalse(l.isSignalled());
1173 :     t.interrupt();
1174 : jsr166 1.41 awaitTermination(t);
1175 :     assertFalse(l.isSignalled());
1176 : dl 1.12 }
1177 :    
1178 :     /**
1179 : jsr166 1.41 * tryAcquireSharedNanos is interruptible
1180 : dl 1.12 */
1181 : jsr166 1.41 public void testTryAcquireSharedNanos_Interruptible() {
1182 : dl 1.12 final BooleanLatch l = new BooleanLatch();
1183 : jsr166 1.41 Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1184 : jsr166 1.29 public void realRun() throws InterruptedException {
1185 : jsr166 1.33 assertFalse(l.isSignalled());
1186 : jsr166 1.41 long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1187 : jsr166 1.33 l.tryAcquireSharedNanos(0, nanos);
1188 : jsr166 1.28 }});
1189 :    
1190 : jsr166 1.41 waitForQueuedThread(l, t);
1191 : jsr166 1.26 assertFalse(l.isSignalled());
1192 :     t.interrupt();
1193 : jsr166 1.41 awaitTermination(t);
1194 :     assertFalse(l.isSignalled());
1195 : dl 1.12 }
1196 :    
1197 :     /**
1198 : jsr166 1.41 * tryAcquireSharedNanos times out if not released before timeout
1199 : dl 1.12 */
1200 : jsr166 1.41 public void testTryAcquireSharedNanos_Timeout() {
1201 : dl 1.12 final BooleanLatch l = new BooleanLatch();
1202 : jsr166 1.44 final BooleanLatch observedQueued = new BooleanLatch();
1203 :     final long timeoutMillis = timeoutMillis();
1204 : jsr166 1.41 Thread t = newStartedThread(new CheckedRunnable() {
1205 : jsr166 1.28 public void realRun() throws InterruptedException {
1206 : jsr166 1.33 assertFalse(l.isSignalled());
1207 : jsr166 1.44 for (long millis = timeoutMillis();
1208 :     !observedQueued.isSignalled();
1209 :     millis *= 2) {
1210 :     long nanos = MILLISECONDS.toNanos(millis);
1211 :     long startTime = System.nanoTime();
1212 :     assertFalse(l.tryAcquireSharedNanos(0, nanos));
1213 :     assertTrue(millisElapsedSince(startTime) >= millis);
1214 :     }
1215 : jsr166 1.41 assertFalse(l.isSignalled());
1216 : jsr166 1.28 }});
1217 :    
1218 : jsr166 1.41 waitForQueuedThread(l, t);
1219 : jsr166 1.44 observedQueued.releaseShared(0);
1220 : jsr166 1.41 assertFalse(l.isSignalled());
1221 :     awaitTermination(t);
1222 : jsr166 1.26 assertFalse(l.isSignalled());
1223 : dl 1.1 }
1224 : dl 1.14
1225 : jsr166 1.45 /**
1226 :     * awaitNanos/timed await with 0 wait times out immediately
1227 :     */
1228 :     public void testAwait_Zero() throws InterruptedException {
1229 :     final Mutex sync = new Mutex();
1230 :     final ConditionObject c = sync.newCondition();
1231 :     sync.acquire();
1232 :     assertTrue(c.awaitNanos(0L) <= 0);
1233 :     assertFalse(c.await(0L, NANOSECONDS));
1234 :     sync.release();
1235 :     }
1236 :    
1237 :     /**
1238 :     * awaitNanos/timed await with maximum negative wait times does not underflow
1239 :     */
1240 :     public void testAwait_NegativeInfinity() throws InterruptedException {
1241 :     final Mutex sync = new Mutex();
1242 :     final ConditionObject c = sync.newCondition();
1243 :     sync.acquire();
1244 :     assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
1245 :     assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
1246 :     sync.release();
1247 :     }
1248 :    
1249 : dl 1.1 }

Doug Lea
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