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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.10 by dl, Wed Jan 7 20:49:53 2004 UTC vs.
Revision 1.29 by jsr166, Sat Nov 21 02:07:26 2009 UTC

#	Line 2 | Line 2
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.
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9
#	Line 22 | Line 22 | public class AbstractQueuedSynchronizerT
22		}
23
24		/**
25	<	* A simple mutex class, from the AbstractQueuedSynchronizer
26	<	* javadoc.  All tests exercise this as a sample user extension.
27	<	* Other methods/features of AbstractQueuedSynchronizerTest are
28	<	* tested implicitly in ReentrantLock, ReentrantReadWriteLock, and
29	<	* Semaphore test classes
30	<	*/
31	<	static class Mutex implements Lock, java.io.Serializable {
32	<	private static class Sync extends AbstractQueuedSynchronizer {
33	<	boolean isLocked() { return getState() == 1; }
34	<
35	<	public boolean tryAcquireExclusive(int acquires) {
36	<	assert acquires == 1; // Does not use multiple acquires
37	<	return compareAndSetState(0, 1);
38	<	}
39	<
40	<	public boolean tryReleaseExclusive(int releases) {
41	<	setState(0);
42	<	return true;
43	<	}
44	<
45	<	public void checkConditionAccess(Thread thread) {
46	<	if (getState() == 0) throw new IllegalMonitorStateException();
47	<	}
48	<
49	<	Condition newCondition() { return new ConditionObject(); }
50	<
51	<	private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
52	<	s.defaultReadObject();
53	<	setState(0); // reset to unlocked state
54	<	}
25	>	* A simple mutex class, adapted from the
26	>	* AbstractQueuedSynchronizer javadoc.  Exclusive acquire tests
27	>	* exercise this as a sample user extension.  Other
28	>	* methods/features of AbstractQueuedSynchronizerTest are tested
29	>	* via other test classes, including those for ReentrantLock,
30	>	* ReentrantReadWriteLock, and Semaphore
31	>	*/
32	>	static class Mutex extends AbstractQueuedSynchronizer {
33	>	public boolean isHeldExclusively() { return getState() == 1; }
34
35	+	public boolean tryAcquire(int acquires) {
36	+	assertTrue(acquires == 1);
37	+	return compareAndSetState(0, 1);
38		}
39	<
40	<	private final Sync sync = new Sync();
41	<	public boolean tryLock() {
42	<	return sync.tryAcquireExclusive(1);
43	<	}
62	<	public void lock() {
63	<	sync.acquireExclusiveUninterruptibly(1);
39	>
40	>	public boolean tryRelease(int releases) {
41	>	if (getState() == 0) throw new IllegalMonitorStateException();
42	>	setState(0);
43	>	return true;
44		}
45	<	public void lockInterruptibly() throws InterruptedException {
46	<	sync.acquireExclusiveInterruptibly(1);
45	>
46	>	public AbstractQueuedSynchronizer.ConditionObject newCondition() { return new AbstractQueuedSynchronizer.ConditionObject(); }
47	>
48	>	}
49	>
50	>
51	>	/**
52	>	* A simple latch class, to test shared mode.
53	>	*/
54	>	static class BooleanLatch extends AbstractQueuedSynchronizer {
55	>	public boolean isSignalled() { return getState() != 0; }
56	>
57	>	public int tryAcquireShared(int ignore) {
58	>	return isSignalled()? 1 : -1;
59		}
60	<	public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException {
61	<	return sync.acquireExclusiveTimed(1, unit.toNanos(timeout));
60	>
61	>	public boolean tryReleaseShared(int ignore) {
62	>	setState(1);
63	>	return true;
64		}
71	–	public void unlock() { sync.releaseExclusive(1); }
72	–	public Condition newCondition() { return sync.newCondition(); }
73	–	public boolean isLocked() { return sync.isLocked(); }
74	–	public boolean hasQueuedThreads() { return sync.hasQueuedThreads(); }
75	–	public boolean hasContended() { return sync.hasContended(); }
76	–	public boolean isQueued(Thread t) { return sync.isQueued(t); }
65		}
66
67		/**
68	<	* A runnable calling lockInterruptibly
69	<	*/
70	<	class InterruptibleLockRunnable implements Runnable {
71	<	final Mutex lock;
72	<	InterruptibleLockRunnable(Mutex l) { lock = l; }
73	<	public void run() {
74	<	try {
75	<	lock.lockInterruptibly();
88	<	} catch(InterruptedException success){}
68	>	* A runnable calling acquireInterruptibly that does not expect to
69	>	* be interrupted.
70	>	*/
71	>	class InterruptibleSyncRunnable extends CheckedRunnable {
72	>	final Mutex sync;
73	>	InterruptibleSyncRunnable(Mutex l) { sync = l; }
74	>	public void realRun() throws InterruptedException {
75	>	sync.acquireInterruptibly(1);
76		}
77		}
78
79
80		/**
81	<	* A runnable calling lockInterruptibly that expects to be
82	<	* interrupted
81	>	* A runnable calling acquireInterruptibly that expects to be
82	>	* interrupted.
83		*/
84	<	class InterruptedLockRunnable implements Runnable {
85	<	final Mutex lock;
86	<	InterruptedLockRunnable(Mutex l) { lock = l; }
87	<	public void run() {
88	<	try {
102	<	lock.lockInterruptibly();
103	<	threadShouldThrow();
104	<	} catch(InterruptedException success){}
84	>	class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
85	>	final Mutex sync;
86	>	InterruptedSyncRunnable(Mutex l) { sync = l; }
87	>	public void realRun() throws InterruptedException {
88	>	sync.acquireInterruptibly(1);
89		}
90		}
91	<
91	>
92		/**
93	<	* locking an unlocked lock succeeds
93	>	* isHeldExclusively is false upon construction
94		*/
95	<	public void testLock() {
96	<	Mutex rl = new Mutex();
97	<	rl.lock();
114	<	assertTrue(rl.isLocked());
115	<	rl.unlock();
95	>	public void testIsHeldExclusively() {
96	>	Mutex rl = new Mutex();
97	>	assertFalse(rl.isHeldExclusively());
98		}
99
100		/**
101	<	* tryLock on an unlocked lock succeeds
101	>	* acquiring released sync succeeds
102		*/
103	<	public void testTryLock() {
104	<	Mutex rl = new Mutex();
105	<	assertTrue(rl.tryLock());
106	<	assertTrue(rl.isLocked());
107	<	rl.unlock();
103	>	public void testAcquire() {
104	>	Mutex rl = new Mutex();
105	>	rl.acquire(1);
106	>	assertTrue(rl.isHeldExclusively());
107	>	rl.release(1);
108	>	assertFalse(rl.isHeldExclusively());
109	>	}
110	>
111	>	/**
112	>	* tryAcquire on an released sync succeeds
113	>	*/
114	>	public void testTryAcquire() {
115	>	Mutex rl = new Mutex();
116	>	assertTrue(rl.tryAcquire(1));
117	>	assertTrue(rl.isHeldExclusively());
118	>	rl.release(1);
119		}
120
121		/**
122		* hasQueuedThreads reports whether there are waiting threads
123		*/
124	<	public void testhasQueuedThreads() {
125	<	final Mutex lock = new Mutex();
126	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
127	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
128	<	try {
129	<	assertFalse(lock.hasQueuedThreads());
130	<	lock.lock();
131	<	t1.start();
132	<	Thread.sleep(SHORT_DELAY_MS);
133	<	assertTrue(lock.hasQueuedThreads());
134	<	t2.start();
135	<	Thread.sleep(SHORT_DELAY_MS);
136	<	assertTrue(lock.hasQueuedThreads());
137	<	t1.interrupt();
138	<	Thread.sleep(SHORT_DELAY_MS);
139	<	assertTrue(lock.hasQueuedThreads());
140	<	lock.unlock();
141	<	Thread.sleep(SHORT_DELAY_MS);
142	<	assertFalse(lock.hasQueuedThreads());
143	<	t1.join();
144	<	t2.join();
145	<	} catch(Exception e){
146	<	unexpectedException();
147	<	}
148	<	}
124	>	public void testhasQueuedThreads() throws InterruptedException {
125	>	final Mutex sync = new Mutex();
126	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
127	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
128	>	assertFalse(sync.hasQueuedThreads());
129	>	sync.acquire(1);
130	>	t1.start();
131	>	Thread.sleep(SHORT_DELAY_MS);
132	>	assertTrue(sync.hasQueuedThreads());
133	>	t2.start();
134	>	Thread.sleep(SHORT_DELAY_MS);
135	>	assertTrue(sync.hasQueuedThreads());
136	>	t1.interrupt();
137	>	Thread.sleep(SHORT_DELAY_MS);
138	>	assertTrue(sync.hasQueuedThreads());
139	>	sync.release(1);
140	>	Thread.sleep(SHORT_DELAY_MS);
141	>	assertFalse(sync.hasQueuedThreads());
142	>	t1.join();
143	>	t2.join();
144	>	}
145	>
146	>	/**
147	>	* isQueued(null) throws NPE
148	>	*/
149	>	public void testIsQueuedNPE() {
150	>	final Mutex sync = new Mutex();
151	>	try {
152	>	sync.isQueued(null);
153	>	shouldThrow();
154	>	} catch (NullPointerException success) {}
155	>	}
156
157		/**
158		* isQueued reports whether a thread is queued.
159		*/
160	<	public void testIsQueued() {
161	<	final Mutex lock = new Mutex();
162	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
163	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
164	<	try {
165	<	assertFalse(lock.isQueued(t1));
166	<	assertFalse(lock.isQueued(t2));
167	<	lock.lock();
168	<	t1.start();
169	<	Thread.sleep(SHORT_DELAY_MS);
170	<	assertTrue(lock.isQueued(t1));
171	<	t2.start();
172	<	Thread.sleep(SHORT_DELAY_MS);
173	<	assertTrue(lock.isQueued(t1));
174	<	assertTrue(lock.isQueued(t2));
175	<	t1.interrupt();
176	<	Thread.sleep(SHORT_DELAY_MS);
177	<	assertFalse(lock.isQueued(t1));
178	<	assertTrue(lock.isQueued(t2));
179	<	lock.unlock();
180	<	Thread.sleep(SHORT_DELAY_MS);
181	<	assertFalse(lock.isQueued(t1));
182	<	assertFalse(lock.isQueued(t2));
183	<	t1.join();
184	<	t2.join();
185	<	} catch(Exception e){
186	<	unexpectedException();
187	<	}
188	<	}
160	>	public void testIsQueued() throws InterruptedException {
161	>	final Mutex sync = new Mutex();
162	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
163	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
164	>	assertFalse(sync.isQueued(t1));
165	>	assertFalse(sync.isQueued(t2));
166	>	sync.acquire(1);
167	>	t1.start();
168	>	Thread.sleep(SHORT_DELAY_MS);
169	>	assertTrue(sync.isQueued(t1));
170	>	t2.start();
171	>	Thread.sleep(SHORT_DELAY_MS);
172	>	assertTrue(sync.isQueued(t1));
173	>	assertTrue(sync.isQueued(t2));
174	>	t1.interrupt();
175	>	Thread.sleep(SHORT_DELAY_MS);
176	>	assertFalse(sync.isQueued(t1));
177	>	assertTrue(sync.isQueued(t2));
178	>	sync.release(1);
179	>	Thread.sleep(SHORT_DELAY_MS);
180	>	assertFalse(sync.isQueued(t1));
181	>	Thread.sleep(SHORT_DELAY_MS);
182	>	assertFalse(sync.isQueued(t2));
183	>	t1.join();
184	>	t2.join();
185	>	}
186	>
187	>	/**
188	>	* getFirstQueuedThread returns first waiting thread or null if none
189	>	*/
190	>	public void testGetFirstQueuedThread() throws InterruptedException {
191	>	final Mutex sync = new Mutex();
192	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
193	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
194	>	assertNull(sync.getFirstQueuedThread());
195	>	sync.acquire(1);
196	>	t1.start();
197	>	Thread.sleep(SHORT_DELAY_MS);
198	>	assertEquals(t1, sync.getFirstQueuedThread());
199	>	t2.start();
200	>	Thread.sleep(SHORT_DELAY_MS);
201	>	assertEquals(t1, sync.getFirstQueuedThread());
202	>	t1.interrupt();
203	>	Thread.sleep(SHORT_DELAY_MS);
204	>	Thread.sleep(SHORT_DELAY_MS);
205	>	assertEquals(t2, sync.getFirstQueuedThread());
206	>	sync.release(1);
207	>	Thread.sleep(SHORT_DELAY_MS);
208	>	assertNull(sync.getFirstQueuedThread());
209	>	t1.join();
210	>	t2.join();
211	>	}
212	>
213	>
214	>	/**
215	>	* hasContended reports false if no thread has ever blocked, else true
216	>	*/
217	>	public void testHasContended() throws InterruptedException {
218	>	final Mutex sync = new Mutex();
219	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
220	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
221	>	assertFalse(sync.hasContended());
222	>	sync.acquire(1);
223	>	t1.start();
224	>	Thread.sleep(SHORT_DELAY_MS);
225	>	assertTrue(sync.hasContended());
226	>	t2.start();
227	>	Thread.sleep(SHORT_DELAY_MS);
228	>	assertTrue(sync.hasContended());
229	>	t1.interrupt();
230	>	Thread.sleep(SHORT_DELAY_MS);
231	>	assertTrue(sync.hasContended());
232	>	sync.release(1);
233	>	Thread.sleep(SHORT_DELAY_MS);
234	>	assertTrue(sync.hasContended());
235	>	t1.join();
236	>	t2.join();
237	>	}
238	>
239	>	/**
240	>	* getQueuedThreads includes waiting threads
241	>	*/
242	>	public void testGetQueuedThreads() throws InterruptedException {
243	>	final Mutex sync = new Mutex();
244	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
245	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
246	>	assertTrue(sync.getQueuedThreads().isEmpty());
247	>	sync.acquire(1);
248	>	assertTrue(sync.getQueuedThreads().isEmpty());
249	>	t1.start();
250	>	Thread.sleep(SHORT_DELAY_MS);
251	>	assertTrue(sync.getQueuedThreads().contains(t1));
252	>	t2.start();
253	>	Thread.sleep(SHORT_DELAY_MS);
254	>	assertTrue(sync.getQueuedThreads().contains(t1));
255	>	assertTrue(sync.getQueuedThreads().contains(t2));
256	>	t1.interrupt();
257	>	Thread.sleep(SHORT_DELAY_MS);
258	>	assertFalse(sync.getQueuedThreads().contains(t1));
259	>	assertTrue(sync.getQueuedThreads().contains(t2));
260	>	sync.release(1);
261	>	Thread.sleep(SHORT_DELAY_MS);
262	>	assertTrue(sync.getQueuedThreads().isEmpty());
263	>	t1.join();
264	>	t2.join();
265	>	}
266	>
267	>	/**
268	>	* getExclusiveQueuedThreads includes waiting threads
269	>	*/
270	>	public void testGetExclusiveQueuedThreads() throws InterruptedException {
271	>	final Mutex sync = new Mutex();
272	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
273	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
274	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
275	>	sync.acquire(1);
276	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
277	>	t1.start();
278	>	Thread.sleep(SHORT_DELAY_MS);
279	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
280	>	t2.start();
281	>	Thread.sleep(SHORT_DELAY_MS);
282	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
283	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
284	>	t1.interrupt();
285	>	Thread.sleep(SHORT_DELAY_MS);
286	>	assertFalse(sync.getExclusiveQueuedThreads().contains(t1));
287	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
288	>	sync.release(1);
289	>	Thread.sleep(SHORT_DELAY_MS);
290	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
291	>	t1.join();
292	>	t2.join();
293	>	}
294	>
295	>	/**
296	>	* getSharedQueuedThreads does not include exclusively waiting threads
297	>	*/
298	>	public void testGetSharedQueuedThreads() throws InterruptedException {
299	>	final Mutex sync = new Mutex();
300	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
301	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
302	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
303	>	sync.acquire(1);
304	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
305	>	t1.start();
306	>	Thread.sleep(SHORT_DELAY_MS);
307	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
308	>	t2.start();
309	>	Thread.sleep(SHORT_DELAY_MS);
310	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
311	>	t1.interrupt();
312	>	Thread.sleep(SHORT_DELAY_MS);
313	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
314	>	sync.release(1);
315	>	Thread.sleep(SHORT_DELAY_MS);
316	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
317	>	t1.join();
318	>	t2.join();
319	>	}
320	>
321	>	/**
322	>	* tryAcquireNanos is interruptible.
323	>	*/
324	>	public void testInterruptedException2() throws InterruptedException {
325	>	final Mutex sync = new Mutex();
326	>	sync.acquire(1);
327	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
328	>	public void realRun() throws InterruptedException {
329	>	sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000 * 1000);
330	>	}});
331	>
332	>	t.start();
333	>	t.interrupt();
334	>	t.join();
335	>	}
336	>
337	>
338	>	/**
339	>	* TryAcquire on exclusively held sync fails
340	>	*/
341	>	public void testTryAcquireWhenSynced() throws InterruptedException {
342	>	final Mutex sync = new Mutex();
343	>	sync.acquire(1);
344	>	Thread t = new Thread(new CheckedRunnable() {
345	>	public void realRun() {
346	>	threadAssertFalse(sync.tryAcquire(1));
347	>	}});
348	>
349	>	t.start();
350	>	t.join();
351	>	sync.release(1);
352	>	}
353	>
354	>	/**
355	>	* tryAcquireNanos on an exclusively held sync times out
356	>	*/
357	>	public void testAcquireNanos_Timeout() throws InterruptedException {
358	>	final Mutex sync = new Mutex();
359	>	sync.acquire(1);
360	>	Thread t = new Thread(new CheckedRunnable() {
361	>	public void realRun() throws InterruptedException {
362	>	threadAssertFalse(sync.tryAcquireNanos(1, 1000 * 1000));
363	>	}});
364	>
365	>	t.start();
366	>	t.join();
367	>	sync.release(1);
368	>	}
369	>
370	>
371	>	/**
372	>	* getState is true when acquired and false when not
373	>	*/
374	>	public void testGetState() throws InterruptedException {
375	>	final Mutex sync = new Mutex();
376	>	sync.acquire(1);
377	>	assertTrue(sync.isHeldExclusively());
378	>	sync.release(1);
379	>	assertFalse(sync.isHeldExclusively());
380	>	Thread t = new Thread(new CheckedRunnable() {
381	>	public void realRun() throws InterruptedException {
382	>	sync.acquire(1);
383	>	Thread.sleep(SMALL_DELAY_MS);
384	>	sync.release(1);
385	>	}});
386	>
387	>	t.start();
388	>	Thread.sleep(SHORT_DELAY_MS);
389	>	assertTrue(sync.isHeldExclusively());
390	>	t.join();
391	>	assertFalse(sync.isHeldExclusively());
392	>	}
393	>
394	>
395	>	/**
396	>	* acquireInterruptibly is interruptible.
397	>	*/
398	>	public void testAcquireInterruptibly1() throws InterruptedException {
399	>	final Mutex sync = new Mutex();
400	>	sync.acquire(1);
401	>	Thread t = new Thread(new InterruptedSyncRunnable(sync));
402	>
403	>	t.start();
404	>	Thread.sleep(SHORT_DELAY_MS);
405	>	t.interrupt();
406	>	Thread.sleep(SHORT_DELAY_MS);
407	>	sync.release(1);
408	>	t.join();
409	>	}
410	>
411	>	/**
412	>	* acquireInterruptibly succeeds when released, else is interruptible
413	>	*/
414	>	public void testAcquireInterruptibly2() throws InterruptedException {
415	>	final Mutex sync = new Mutex();
416	>	sync.acquireInterruptibly(1);
417	>	Thread t = new Thread(new InterruptedSyncRunnable(sync));
418	>	t.start();
419	>	t.interrupt();
420	>	assertTrue(sync.isHeldExclusively());
421	>	t.join();
422	>	}
423	>
424	>	/**
425	>	* owns is true for a condition created by sync else false
426	>	*/
427	>	public void testOwns() {
428	>	final Mutex sync = new Mutex();
429	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
430	>	final Mutex sync2 = new Mutex();
431	>	assertTrue(sync.owns(c));
432	>	assertFalse(sync2.owns(c));
433	>	}
434	>
435	>	/**
436	>	* Calling await without holding sync throws IllegalMonitorStateException
437	>	*/
438	>	public void testAwait_IllegalMonitor() throws InterruptedException {
439	>	final Mutex sync = new Mutex();
440	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
441	>	try {
442	>	c.await();
443	>	shouldThrow();
444	>	} catch (IllegalMonitorStateException success) {}
445	>	}
446
447	+	/**
448	+	* Calling signal without holding sync throws IllegalMonitorStateException
449	+	*/
450	+	public void testSignal_IllegalMonitor() {
451	+	final Mutex sync = new Mutex();
452	+	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
453	+	try {
454	+	c.signal();
455	+	shouldThrow();
456	+	} catch (IllegalMonitorStateException success) {}
457	+	}
458
459		/**
460	<	* hasContended reports whether there has been contention
460	>	* awaitNanos without a signal times out
461		*/
462	<	public void testhasContended() {
463	<	final Mutex lock = new Mutex();
464	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
465	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
466	<	try {
467	<	assertFalse(lock.hasContended());
468	<	lock.lock();
469	<	t1.start();
470	<	Thread.sleep(SHORT_DELAY_MS);
471	<	assertTrue(lock.hasContended());
472	<	t2.start();
473	<	Thread.sleep(SHORT_DELAY_MS);
474	<	assertTrue(lock.hasContended());
475	<	t1.interrupt();
476	<	Thread.sleep(SHORT_DELAY_MS);
477	<	assertTrue(lock.hasContended());
478	<	lock.unlock();
479	<	Thread.sleep(SHORT_DELAY_MS);
480	<	assertTrue(lock.hasContended());
213	<	t1.join();
214	<	t2.join();
215	<	} catch(Exception e){
216	<	unexpectedException();
217	<	}
218	<	}
462	>	public void testAwaitNanos_Timeout() throws InterruptedException {
463	>	final Mutex sync = new Mutex();
464	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
465	>	sync.acquire(1);
466	>	long t = c.awaitNanos(100);
467	>	assertTrue(t <= 0);
468	>	sync.release(1);
469	>	}
470	>
471	>	/**
472	>	*  Timed await without a signal times out
473	>	*/
474	>	public void testAwait_Timeout() throws InterruptedException {
475	>	final Mutex sync = new Mutex();
476	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
477	>	sync.acquire(1);
478	>	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
479	>	sync.release(1);
480	>	}
481
482		/**
483	<	* timed tryLock is interruptible.
483	>	* awaitUntil without a signal times out
484		*/
485	<	public void testInterruptedException2() {
486	<	final Mutex lock = new Mutex();
487	<	lock.lock();
488	<	Thread t = new Thread(new Runnable() {
489	<	public void run() {
490	<	try {
491	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
230	<	threadShouldThrow();
231	<	} catch(InterruptedException success){}
232	<	}
233	<	});
234	<	try {
235	<	t.start();
236	<	t.interrupt();
237	<	} catch(Exception e){
238	<	unexpectedException();
239	<	}
485	>	public void testAwaitUntil_Timeout() throws InterruptedException {
486	>	final Mutex sync = new Mutex();
487	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
488	>	sync.acquire(1);
489	>	java.util.Date d = new java.util.Date();
490	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
491	>	sync.release(1);
492		}
493
494	+	/**
495	+	* await returns when signalled
496	+	*/
497	+	public void testAwait() throws InterruptedException {
498	+	final Mutex sync = new Mutex();
499	+	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
500	+	Thread t = new Thread(new CheckedRunnable() {
501	+	public void realRun() throws InterruptedException {
502	+	sync.acquire(1);
503	+	c.await();
504	+	sync.release(1);
505	+	}});
506	+
507	+	t.start();
508	+	Thread.sleep(SHORT_DELAY_MS);
509	+	sync.acquire(1);
510	+	c.signal();
511	+	sync.release(1);
512	+	t.join(SHORT_DELAY_MS);
513	+	assertFalse(t.isAlive());
514	+	}
515	+
516	+
517
518		/**
519	<	* TryLock on a locked lock fails
519	>	* hasWaiters throws NPE if null
520		*/
521	<	public void testTryLockWhenLocked() {
522	<	final Mutex lock = new Mutex();
523	<	lock.lock();
524	<	Thread t = new Thread(new Runnable() {
525	<	public void run() {
526	<	threadAssertFalse(lock.tryLock());
527	<	}
253	<	});
254	<	try {
255	<	t.start();
256	<	t.join();
257	<	lock.unlock();
258	<	} catch(Exception e){
259	<	unexpectedException();
260	<	}
261	<	}
521	>	public void testHasWaitersNPE() {
522	>	final Mutex sync = new Mutex();
523	>	try {
524	>	sync.hasWaiters(null);
525	>	shouldThrow();
526	>	} catch (NullPointerException success) {}
527	>	}
528
529		/**
530	<	* Timed tryLock on a locked lock times out
530	>	* getWaitQueueLength throws NPE if null
531		*/
532	<	public void testTryLock_Timeout() {
533	<	final Mutex lock = new Mutex();
534	<	lock.lock();
535	<	Thread t = new Thread(new Runnable() {
536	<	public void run() {
537	<	try {
272	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
273	<	} catch (Exception ex) {
274	<	threadUnexpectedException();
275	<	}
276	<	}
277	<	});
278	<	try {
279	<	t.start();
280	<	t.join();
281	<	lock.unlock();
282	<	} catch(Exception e){
283	<	unexpectedException();
284	<	}
285	<	}
286	<
287	<
288	<	/**
289	<	* isLocked is true when locked and false when not
290	<	*/
291	<	public void testIsLocked() {
292	<	final Mutex lock = new Mutex();
293	<	lock.lock();
294	<	assertTrue(lock.isLocked());
295	<	lock.unlock();
296	<	assertFalse(lock.isLocked());
297	<	Thread t = new Thread(new Runnable() {
298	<	public void run() {
299	<	lock.lock();
300	<	try {
301	<	Thread.sleep(SMALL_DELAY_MS);
302	<	}
303	<	catch(Exception e) {
304	<	threadUnexpectedException();
305	<	}
306	<	lock.unlock();
307	<	}
308	<	});
309	<	try {
310	<	t.start();
311	<	Thread.sleep(SHORT_DELAY_MS);
312	<	assertTrue(lock.isLocked());
313	<	t.join();
314	<	assertFalse(lock.isLocked());
315	<	} catch(Exception e){
316	<	unexpectedException();
317	<	}
532	>	public void testGetWaitQueueLengthNPE() {
533	>	final Mutex sync = new Mutex();
534	>	try {
535	>	sync.getWaitQueueLength(null);
536	>	shouldThrow();
537	>	} catch (NullPointerException success) {}
538		}
539
540
541		/**
542	<	* lockInterruptibly is interruptible.
542	>	* getWaitingThreads throws NPE if null
543		*/
544	<	public void testLockInterruptibly1() {
545	<	final Mutex lock = new Mutex();
546	<	lock.lock();
547	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
548	<	try {
549	<	t.start();
550	<	t.interrupt();
551	<	lock.unlock();
332	<	t.join();
333	<	} catch(Exception e){
334	<	unexpectedException();
335	<	}
336	<	}
544	>	public void testGetWaitingThreadsNPE() {
545	>	final Mutex sync = new Mutex();
546	>	try {
547	>	sync.getWaitingThreads(null);
548	>	shouldThrow();
549	>	} catch (NullPointerException success) {}
550	>	}
551	>
552
553		/**
554	<	* lockInterruptibly succeeds when unlocked, else is interruptible
554	>	* hasWaiters throws IAE if not owned
555		*/
556	<	public void testLockInterruptibly2() {
557	<	final Mutex lock = new Mutex();
558	<	try {
559	<	lock.lockInterruptibly();
345	<	} catch(Exception e) {
346	<	unexpectedException();
347	<	}
348	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
556	>	public void testHasWaitersIAE() {
557	>	final Mutex sync = new Mutex();
558	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
559	>	final Mutex sync2 = new Mutex();
560		try {
561	<	t.start();
562	<	t.interrupt();
563	<	assertTrue(lock.isLocked());
353	<	t.join();
354	<	} catch(Exception e){
355	<	unexpectedException();
356	<	}
561	>	sync2.hasWaiters(c);
562	>	shouldThrow();
563	>	} catch (IllegalArgumentException success) {}
564		}
565
566		/**
567	<	* Calling await without holding lock throws IllegalMonitorStateException
567	>	* hasWaiters throws IMSE if not synced
568		*/
569	<	public void testAwait_IllegalMonitor() {
570	<	final Mutex lock = new Mutex();
571	<	final Condition c = lock.newCondition();
569	>	public void testHasWaitersIMSE() {
570	>	final Mutex sync = new Mutex();
571	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
572		try {
573	<	c.await();
573	>	sync.hasWaiters(c);
574		shouldThrow();
575	<	}
369	<	catch (IllegalMonitorStateException success) {
370	<	}
371	<	catch (Exception ex) {
372	<	unexpectedException();
373	<	}
575	>	} catch (IllegalMonitorStateException success) {}
576		}
577
578	+
579		/**
580	<	* Calling signal without holding lock throws IllegalMonitorStateException
580	>	* getWaitQueueLength throws IAE if not owned
581		*/
582	<	public void testSignal_IllegalMonitor() {
583	<	final Mutex lock = new Mutex();
584	<	final Condition c = lock.newCondition();
582	>	public void testGetWaitQueueLengthIAE() {
583	>	final Mutex sync = new Mutex();
584	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
585	>	final Mutex sync2 = new Mutex();
586		try {
587	<	c.signal();
587	>	sync2.getWaitQueueLength(c);
588		shouldThrow();
589	<	}
386	<	catch (IllegalMonitorStateException success) {
387	<	}
388	<	catch (Exception ex) {
389	<	unexpectedException();
390	<	}
589	>	} catch (IllegalArgumentException success) {}
590		}
591
592		/**
593	<	* awaitNanos without a signal times out
593	>	* getWaitQueueLength throws IMSE if not synced
594		*/
595	<	public void testAwaitNanos_Timeout() {
596	<	final Mutex lock = new Mutex();
597	<	final Condition c = lock.newCondition();
598	<	try {
599	<	lock.lock();
600	<	long t = c.awaitNanos(100);
601	<	assertTrue(t <= 0);
403	<	lock.unlock();
404	<	}
405	<	catch (Exception ex) {
406	<	unexpectedException();
407	<	}
595	>	public void testGetWaitQueueLengthIMSE() {
596	>	final Mutex sync = new Mutex();
597	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
598	>	try {
599	>	sync.getWaitQueueLength(c);
600	>	shouldThrow();
601	>	} catch (IllegalMonitorStateException success) {}
602		}
603
604	+
605		/**
606	<	*  timed await without a signal times out
606	>	* getWaitingThreads throws IAE if not owned
607		*/
608	<	public void testAwait_Timeout() {
609	<	final Mutex lock = new Mutex();
610	<	final Condition c = lock.newCondition();
611	<	try {
612	<	lock.lock();
613	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
614	<	lock.unlock();
615	<	}
421	<	catch (Exception ex) {
422	<	unexpectedException();
423	<	}
608	>	public void testGetWaitingThreadsIAE() {
609	>	final Mutex sync = new Mutex();
610	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
611	>	final Mutex sync2 = new Mutex();
612	>	try {
613	>	sync2.getWaitingThreads(c);
614	>	shouldThrow();
615	>	} catch (IllegalArgumentException success) {}
616		}
617
618		/**
619	<	* awaitUntil without a signal times out
619	>	* getWaitingThreads throws IMSE if not synced
620		*/
621	<	public void testAwaitUntil_Timeout() {
622	<	final Mutex lock = new Mutex();
623	<	final Condition c = lock.newCondition();
624	<	try {
625	<	lock.lock();
626	<	java.util.Date d = new java.util.Date();
627	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
436	<	lock.unlock();
437	<	}
438	<	catch (Exception ex) {
439	<	unexpectedException();
440	<	}
621	>	public void testGetWaitingThreadsIMSE() {
622	>	final Mutex sync = new Mutex();
623	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
624	>	try {
625	>	sync.getWaitingThreads(c);
626	>	shouldThrow();
627	>	} catch (IllegalMonitorStateException success) {}
628		}
629
630	+
631	+
632		/**
633	<	* await returns when signalled
633	>	* hasWaiters returns true when a thread is waiting, else false
634		*/
635	<	public void testAwait() {
636	<	final Mutex lock = new Mutex();
637	<	final Condition c = lock.newCondition();
638	<	Thread t = new Thread(new Runnable() {
639	<	public void run() {
640	<	try {
641	<	lock.lock();
642	<	c.await();
643	<	lock.unlock();
644	<	}
645	<	catch(InterruptedException e) {
646	<	threadUnexpectedException();
647	<	}
648	<	}
649	<	});
650	<
651	<	try {
652	<	t.start();
653	<	Thread.sleep(SHORT_DELAY_MS);
654	<	lock.lock();
655	<	c.signal();
656	<	lock.unlock();
657	<	t.join(SHORT_DELAY_MS);
658	<	assertFalse(t.isAlive());
659	<	}
660	<	catch (Exception ex) {
661	<	unexpectedException();
662	<	}
635	>	public void testHasWaiters() throws InterruptedException {
636	>	final Mutex sync = new Mutex();
637	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
638	>	Thread t = new Thread(new CheckedRunnable() {
639	>	public void realRun() throws InterruptedException {
640	>	sync.acquire(1);
641	>	threadAssertFalse(sync.hasWaiters(c));
642	>	threadAssertEquals(0, sync.getWaitQueueLength(c));
643	>	c.await();
644	>	sync.release(1);
645	>	}});
646	>
647	>	t.start();
648	>	Thread.sleep(SHORT_DELAY_MS);
649	>	sync.acquire(1);
650	>	assertTrue(sync.hasWaiters(c));
651	>	assertEquals(1, sync.getWaitQueueLength(c));
652	>	c.signal();
653	>	sync.release(1);
654	>	Thread.sleep(SHORT_DELAY_MS);
655	>	sync.acquire(1);
656	>	assertFalse(sync.hasWaiters(c));
657	>	assertEquals(0, sync.getWaitQueueLength(c));
658	>	sync.release(1);
659	>	t.join(SHORT_DELAY_MS);
660	>	assertFalse(t.isAlive());
661	>	}
662	>
663	>	/**
664	>	* getWaitQueueLength returns number of waiting threads
665	>	*/
666	>	public void testGetWaitQueueLength() throws InterruptedException {
667	>	final Mutex sync = new Mutex();
668	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
669	>	Thread t1 = new Thread(new CheckedRunnable() {
670	>	public void realRun() throws InterruptedException {
671	>	sync.acquire(1);
672	>	threadAssertFalse(sync.hasWaiters(c));
673	>	threadAssertEquals(0, sync.getWaitQueueLength(c));
674	>	c.await();
675	>	sync.release(1);
676	>	}});
677	>
678	>	Thread t2 = new Thread(new CheckedRunnable() {
679	>	public void realRun() throws InterruptedException {
680	>	sync.acquire(1);
681	>	threadAssertTrue(sync.hasWaiters(c));
682	>	threadAssertEquals(1, sync.getWaitQueueLength(c));
683	>	c.await();
684	>	sync.release(1);
685	>	}});
686	>
687	>	t1.start();
688	>	Thread.sleep(SHORT_DELAY_MS);
689	>	t2.start();
690	>	Thread.sleep(SHORT_DELAY_MS);
691	>	sync.acquire(1);
692	>	assertTrue(sync.hasWaiters(c));
693	>	assertEquals(2, sync.getWaitQueueLength(c));
694	>	c.signalAll();
695	>	sync.release(1);
696	>	Thread.sleep(SHORT_DELAY_MS);
697	>	sync.acquire(1);
698	>	assertFalse(sync.hasWaiters(c));
699	>	assertEquals(0, sync.getWaitQueueLength(c));
700	>	sync.release(1);
701	>	t1.join(SHORT_DELAY_MS);
702	>	t2.join(SHORT_DELAY_MS);
703	>	assertFalse(t1.isAlive());
704	>	assertFalse(t2.isAlive());
705	>	}
706	>
707	>	/**
708	>	* getWaitingThreads returns only and all waiting threads
709	>	*/
710	>	public void testGetWaitingThreads() throws InterruptedException {
711	>	final Mutex sync = new Mutex();
712	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
713	>	Thread t1 = new Thread(new CheckedRunnable() {
714	>	public void realRun() throws InterruptedException {
715	>	sync.acquire(1);
716	>	threadAssertTrue(sync.getWaitingThreads(c).isEmpty());
717	>	c.await();
718	>	sync.release(1);
719	>	}});
720	>
721	>	Thread t2 = new Thread(new CheckedRunnable() {
722	>	public void realRun() throws InterruptedException {
723	>	sync.acquire(1);
724	>	threadAssertFalse(sync.getWaitingThreads(c).isEmpty());
725	>	c.await();
726	>	sync.release(1);
727	>	}});
728	>
729	>	sync.acquire(1);
730	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
731	>	sync.release(1);
732	>	t1.start();
733	>	Thread.sleep(SHORT_DELAY_MS);
734	>	t2.start();
735	>	Thread.sleep(SHORT_DELAY_MS);
736	>	sync.acquire(1);
737	>	assertTrue(sync.hasWaiters(c));
738	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
739	>	assertTrue(sync.getWaitingThreads(c).contains(t2));
740	>	c.signalAll();
741	>	sync.release(1);
742	>	Thread.sleep(SHORT_DELAY_MS);
743	>	sync.acquire(1);
744	>	assertFalse(sync.hasWaiters(c));
745	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
746	>	sync.release(1);
747	>	t1.join(SHORT_DELAY_MS);
748	>	t2.join(SHORT_DELAY_MS);
749	>	assertFalse(t1.isAlive());
750	>	assertFalse(t2.isAlive());
751	>	}
752	>
753	>
754	>
755	>	/**
756	>	* awaitUninterruptibly doesn't abort on interrupt
757	>	*/
758	>	public void testAwaitUninterruptibly() throws InterruptedException {
759	>	final Mutex sync = new Mutex();
760	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
761	>	Thread t = new Thread(new CheckedRunnable() {
762	>	public void realRun() {
763	>	sync.acquire(1);
764	>	c.awaitUninterruptibly();
765	>	sync.release(1);
766	>	}});
767	>
768	>	t.start();
769	>	Thread.sleep(SHORT_DELAY_MS);
770	>	t.interrupt();
771	>	sync.acquire(1);
772	>	c.signal();
773	>	sync.release(1);
774	>	t.join(SHORT_DELAY_MS);
775	>	assertFalse(t.isAlive());
776	>	}
777	>
778	>	/**
779	>	* await is interruptible
780	>	*/
781	>	public void testAwait_Interrupt() throws InterruptedException {
782	>	final Mutex sync = new Mutex();
783	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
784	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
785	>	public void realRun() throws InterruptedException {
786	>	sync.acquire(1);
787	>	c.await();
788	>	sync.release(1);
789	>	}});
790	>
791	>	t.start();
792	>	Thread.sleep(SHORT_DELAY_MS);
793	>	t.interrupt();
794	>	t.join(SHORT_DELAY_MS);
795	>	assertFalse(t.isAlive());
796	>	}
797	>
798	>	/**
799	>	* awaitNanos is interruptible
800	>	*/
801	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
802	>	final Mutex sync = new Mutex();
803	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
804	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
805	>	public void realRun() throws InterruptedException {
806	>	sync.acquire(1);
807	>	c.awaitNanos(1000 * 1000 * 1000); // 1 sec
808	>	sync.release(1);
809	>	}});
810	>
811	>	t.start();
812	>	Thread.sleep(SHORT_DELAY_MS);
813	>	t.interrupt();
814	>	t.join(SHORT_DELAY_MS);
815	>	assertFalse(t.isAlive());
816	>	}
817	>
818	>	/**
819	>	* awaitUntil is interruptible
820	>	*/
821	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
822	>	final Mutex sync = new Mutex();
823	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
824	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
825	>	public void realRun() throws InterruptedException {
826	>	sync.acquire(1);
827	>	java.util.Date d = new java.util.Date();
828	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
829	>	sync.release(1);
830	>	}});
831	>
832	>	t.start();
833	>	Thread.sleep(SHORT_DELAY_MS);
834	>	t.interrupt();
835	>	t.join(SHORT_DELAY_MS);
836	>	assertFalse(t.isAlive());
837	>	}
838	>
839	>	/**
840	>	* signalAll wakes up all threads
841	>	*/
842	>	public void testSignalAll() throws InterruptedException {
843	>	final Mutex sync = new Mutex();
844	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
845	>	Thread t1 = new Thread(new CheckedRunnable() {
846	>	public void realRun() throws InterruptedException {
847	>	sync.acquire(1);
848	>	c.await();
849	>	sync.release(1);
850	>	}});
851	>
852	>	Thread t2 = new Thread(new CheckedRunnable() {
853	>	public void realRun() throws InterruptedException {
854	>	sync.acquire(1);
855	>	c.await();
856	>	sync.release(1);
857	>	}});
858	>
859	>	t1.start();
860	>	t2.start();
861	>	Thread.sleep(SHORT_DELAY_MS);
862	>	sync.acquire(1);
863	>	c.signalAll();
864	>	sync.release(1);
865	>	t1.join(SHORT_DELAY_MS);
866	>	t2.join(SHORT_DELAY_MS);
867	>	assertFalse(t1.isAlive());
868	>	assertFalse(t2.isAlive());
869	>	}
870	>
871	>
872	>	/**
873	>	* toString indicates current state
874	>	*/
875	>	public void testToString() {
876	>	Mutex sync = new Mutex();
877	>	String us = sync.toString();
878	>	assertTrue(us.indexOf("State = 0") >= 0);
879	>	sync.acquire(1);
880	>	String ls = sync.toString();
881	>	assertTrue(ls.indexOf("State = 1") >= 0);
882	>	}
883	>
884	>	/**
885	>	* A serialized AQS deserializes with current state
886	>	*/
887	>	public void testSerialization() throws Exception {
888	>	Mutex l = new Mutex();
889	>	l.acquire(1);
890	>	assertTrue(l.isHeldExclusively());
891	>
892	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
893	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
894	>	out.writeObject(l);
895	>	out.close();
896	>
897	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
898	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
899	>	Mutex r = (Mutex) in.readObject();
900	>	assertTrue(r.isHeldExclusively());
901	>	}
902	>
903	>
904	>	/**
905	>	* tryReleaseShared setting state changes getState
906	>	*/
907	>	public void testGetStateWithReleaseShared() {
908	>	final BooleanLatch l = new BooleanLatch();
909	>	assertFalse(l.isSignalled());
910	>	l.releaseShared(0);
911	>	assertTrue(l.isSignalled());
912	>	}
913	>
914	>	/**
915	>	* releaseShared has no effect when already signalled
916	>	*/
917	>	public void testReleaseShared() {
918	>	final BooleanLatch l = new BooleanLatch();
919	>	assertFalse(l.isSignalled());
920	>	l.releaseShared(0);
921	>	assertTrue(l.isSignalled());
922	>	l.releaseShared(0);
923	>	assertTrue(l.isSignalled());
924	>	}
925	>
926	>	/**
927	>	* acquireSharedInterruptibly returns after release, but not before
928	>	*/
929	>	public void testAcquireSharedInterruptibly() throws InterruptedException {
930	>	final BooleanLatch l = new BooleanLatch();
931	>
932	>	Thread t = new Thread(new CheckedRunnable() {
933	>	public void realRun() throws InterruptedException {
934	>	threadAssertFalse(l.isSignalled());
935	>	l.acquireSharedInterruptibly(0);
936	>	threadAssertTrue(l.isSignalled());
937	>	}});
938	>
939	>	t.start();
940	>	assertFalse(l.isSignalled());
941	>	Thread.sleep(SHORT_DELAY_MS);
942	>	l.releaseShared(0);
943	>	assertTrue(l.isSignalled());
944	>	t.join();
945	>	}
946	>
947	>
948	>	/**
949	>	* acquireSharedTimed returns after release
950	>	*/
951	>	public void testAsquireSharedTimed() throws InterruptedException {
952	>	final BooleanLatch l = new BooleanLatch();
953	>
954	>	Thread t = new Thread(new CheckedRunnable() {
955	>	public void realRun() throws InterruptedException {
956	>	threadAssertFalse(l.isSignalled());
957	>	threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
958	>	threadAssertTrue(l.isSignalled());
959	>	}});
960	>
961	>	t.start();
962	>	assertFalse(l.isSignalled());
963	>	Thread.sleep(SHORT_DELAY_MS);
964	>	l.releaseShared(0);
965	>	assertTrue(l.isSignalled());
966	>	t.join();
967	>	}
968	>
969	>	/**
970	>	* acquireSharedInterruptibly throws IE if interrupted before released
971	>	*/
972	>	public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException {
973	>	final BooleanLatch l = new BooleanLatch();
974	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
975	>	public void realRun() throws InterruptedException {
976	>	threadAssertFalse(l.isSignalled());
977	>	l.acquireSharedInterruptibly(0);
978	>	}});
979	>
980	>	t.start();
981	>	assertFalse(l.isSignalled());
982	>	t.interrupt();
983	>	t.join();
984	>	}
985	>
986	>	/**
987	>	* acquireSharedTimed throws IE if interrupted before released
988	>	*/
989	>	public void testAcquireSharedNanos_InterruptedException() throws InterruptedException {
990	>	final BooleanLatch l = new BooleanLatch();
991	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
992	>	public void realRun() throws InterruptedException {
993	>	threadAssertFalse(l.isSignalled());
994	>	l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
995	>	}});
996	>
997	>	t.start();
998	>	Thread.sleep(SHORT_DELAY_MS);
999	>	assertFalse(l.isSignalled());
1000	>	t.interrupt();
1001	>	t.join();
1002	>	}
1003	>
1004	>	/**
1005	>	* acquireSharedTimed times out if not released before timeout
1006	>	*/
1007	>	public void testAcquireSharedNanos_Timeout() throws InterruptedException {
1008	>	final BooleanLatch l = new BooleanLatch();
1009	>	Thread t = new Thread(new CheckedRunnable() {
1010	>	public void realRun() throws InterruptedException {
1011	>	threadAssertFalse(l.isSignalled());
1012	>	threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1013	>	}});
1014	>
1015	>	t.start();
1016	>	Thread.sleep(SHORT_DELAY_MS);
1017	>	assertFalse(l.isSignalled());
1018	>	t.join();
1019		}
1020	<
1020	>
1021		}

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