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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.7 by dl, Fri Jan 2 21:06:38 2004 UTC vs.
Revision 1.34 by jsr166, Wed Aug 25 00:07:02 2010 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
10		import junit.framework.*;
11		import java.util.*;
12		import java.util.concurrent.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.util.concurrent.locks.*;
15		import java.io.*;
16
17		public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22		return new TestSuite(AbstractQueuedSynchronizerTest.class);
23		}
24
25		/**
26	<	* A simple mutex class, from the AbstractQueuedSynchronizer
27	<	* javadoc.  All tests exercise this as a sample user extension.
28	<	* Other methods/features of AbstractQueuedSynchronizerTest are
29	<	* tested implicitly in ReentrantLock, ReentrantReadWriteLock, and
30	<	* Semaphore test classes
31	<	*/
32	<	static class Mutex implements Lock, java.io.Serializable {
33	<	private static class Sync extends AbstractQueuedSynchronizer {
34	<	boolean isLocked() { return getState() == 1; }
35	<
36	<	public boolean tryAcquireExclusive(boolean isQueued, int acquires) {
37	<	assert acquires == 1; // Does not use multiple acquires
38	<	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, boolean waiting) {
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	<	}
55	<	}
56	<
57	<	private final Sync sync = new Sync();
58	<	public boolean tryLock() {
59	<	return sync.tryAcquireExclusive(false, 1);
26	>	* A simple mutex class, adapted from the
27	>	* AbstractQueuedSynchronizer javadoc.  Exclusive acquire tests
28	>	* exercise this as a sample user extension.  Other
29	>	* methods/features of AbstractQueuedSynchronizerTest are tested
30	>	* via other test classes, including those for ReentrantLock,
31	>	* ReentrantReadWriteLock, and Semaphore
32	>	*/
33	>	static class Mutex extends AbstractQueuedSynchronizer {
34	>	public boolean isHeldExclusively() { return getState() == 1; }
35	>
36	>	public boolean tryAcquire(int acquires) {
37	>	assertTrue(acquires == 1);
38	>	return compareAndSetState(0, 1);
39		}
40	<	public void lock() {
41	<	sync.acquireExclusiveUninterruptibly(1);
40	>
41	>	public boolean tryRelease(int releases) {
42	>	if (getState() == 0) throw new IllegalMonitorStateException();
43	>	setState(0);
44	>	return true;
45		}
46	<	public void lockInterruptibly() throws InterruptedException {
47	<	sync.acquireExclusiveInterruptibly(1);
46	>
47	>	public AbstractQueuedSynchronizer.ConditionObject newCondition() { return new AbstractQueuedSynchronizer.ConditionObject(); }
48	>
49	>	}
50	>
51	>
52	>	/**
53	>	* A simple latch class, to test shared mode.
54	>	*/
55	>	static class BooleanLatch extends AbstractQueuedSynchronizer {
56	>	public boolean isSignalled() { return getState() != 0; }
57	>
58	>	public int tryAcquireShared(int ignore) {
59	>	return isSignalled()? 1 : -1;
60		}
61	<	public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException {
62	<	return sync.acquireExclusiveTimed(1, unit.toNanos(timeout));
61	>
62	>	public boolean tryReleaseShared(int ignore) {
63	>	setState(1);
64	>	return true;
65		}
70	–	public void unlock() { sync.releaseExclusive(1); }
71	–	public Condition newCondition() { return sync.newCondition(); }
72	–	public boolean isLocked() { return sync.isLocked(); }
73	–	public boolean hasQueuedThreads() { return sync.hasQueuedThreads(); }
66		}
67
68		/**
69	<	* A runnable calling lockInterruptibly
70	<	*/
71	<	class InterruptibleLockRunnable implements Runnable {
72	<	final Mutex lock;
73	<	InterruptibleLockRunnable(Mutex l) { lock = l; }
74	<	public void run() {
75	<	try {
76	<	lock.lockInterruptibly();
85	<	} catch(InterruptedException success){}
69	>	* A runnable calling acquireInterruptibly that does not expect to
70	>	* be interrupted.
71	>	*/
72	>	class InterruptibleSyncRunnable extends CheckedRunnable {
73	>	final Mutex sync;
74	>	InterruptibleSyncRunnable(Mutex l) { sync = l; }
75	>	public void realRun() throws InterruptedException {
76	>	sync.acquireInterruptibly(1);
77		}
78		}
79
80
81		/**
82	<	* A runnable calling lockInterruptibly that expects to be
83	<	* interrupted
82	>	* A runnable calling acquireInterruptibly that expects to be
83	>	* interrupted.
84		*/
85	<	class InterruptedLockRunnable implements Runnable {
86	<	final Mutex lock;
87	<	InterruptedLockRunnable(Mutex l) { lock = l; }
88	<	public void run() {
89	<	try {
99	<	lock.lockInterruptibly();
100	<	threadShouldThrow();
101	<	} catch(InterruptedException success){}
85	>	class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
86	>	final Mutex sync;
87	>	InterruptedSyncRunnable(Mutex l) { sync = l; }
88	>	public void realRun() throws InterruptedException {
89	>	sync.acquireInterruptibly(1);
90		}
91		}
92	<
92	>
93		/**
94	<	* locking an unlocked lock succeeds
94	>	* isHeldExclusively is false upon construction
95		*/
96	<	public void testLock() {
97	<	Mutex rl = new Mutex();
98	<	rl.lock();
111	<	assertTrue(rl.isLocked());
112	<	rl.unlock();
96	>	public void testIsHeldExclusively() {
97	>	Mutex rl = new Mutex();
98	>	assertFalse(rl.isHeldExclusively());
99		}
100
101		/**
102	<	* tryLock on an unlocked lock succeeds
102	>	* acquiring released sync succeeds
103		*/
104	<	public void testTryLock() {
105	<	Mutex rl = new Mutex();
106	<	assertTrue(rl.tryLock());
107	<	assertTrue(rl.isLocked());
108	<	rl.unlock();
104	>	public void testAcquire() {
105	>	Mutex rl = new Mutex();
106	>	rl.acquire(1);
107	>	assertTrue(rl.isHeldExclusively());
108	>	rl.release(1);
109	>	assertFalse(rl.isHeldExclusively());
110	>	}
111	>
112	>	/**
113	>	* tryAcquire on an released sync succeeds
114	>	*/
115	>	public void testTryAcquire() {
116	>	Mutex rl = new Mutex();
117	>	assertTrue(rl.tryAcquire(1));
118	>	assertTrue(rl.isHeldExclusively());
119	>	rl.release(1);
120		}
121
122		/**
123		* hasQueuedThreads reports whether there are waiting threads
124		*/
125	<	public void testhasQueuedThreads() {
126	<	final Mutex lock = new Mutex();
127	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
128	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
129	<	try {
130	<	assertFalse(lock.hasQueuedThreads());
131	<	lock.lock();
132	<	t1.start();
133	<	Thread.sleep(SHORT_DELAY_MS);
134	<	assertTrue(lock.hasQueuedThreads());
135	<	t2.start();
136	<	Thread.sleep(SHORT_DELAY_MS);
137	<	assertTrue(lock.hasQueuedThreads());
138	<	t1.interrupt();
139	<	Thread.sleep(SHORT_DELAY_MS);
140	<	assertTrue(lock.hasQueuedThreads());
141	<	lock.unlock();
142	<	Thread.sleep(SHORT_DELAY_MS);
143	<	assertFalse(lock.hasQueuedThreads());
144	<	t1.join();
145	<	t2.join();
149	<	} catch(Exception e){
150	<	unexpectedException();
151	<	}
152	<	}
125	>	public void testhasQueuedThreads() throws InterruptedException {
126	>	final Mutex sync = new Mutex();
127	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
128	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
129	>	assertFalse(sync.hasQueuedThreads());
130	>	sync.acquire(1);
131	>	t1.start();
132	>	Thread.sleep(SHORT_DELAY_MS);
133	>	assertTrue(sync.hasQueuedThreads());
134	>	t2.start();
135	>	Thread.sleep(SHORT_DELAY_MS);
136	>	assertTrue(sync.hasQueuedThreads());
137	>	t1.interrupt();
138	>	Thread.sleep(SHORT_DELAY_MS);
139	>	assertTrue(sync.hasQueuedThreads());
140	>	sync.release(1);
141	>	Thread.sleep(SHORT_DELAY_MS);
142	>	assertFalse(sync.hasQueuedThreads());
143	>	t1.join();
144	>	t2.join();
145	>	}
146
147		/**
148	<	* timed tryLock is interruptible.
148	>	* isQueued(null) throws NPE
149		*/
150	<	public void testInterruptedException2() {
151	<	final Mutex lock = new Mutex();
152	<	lock.lock();
153	<	Thread t = new Thread(new Runnable() {
154	<	public void run() {
155	<	try {
163	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
164	<	threadShouldThrow();
165	<	} catch(InterruptedException success){}
166	<	}
167	<	});
168	<	try {
169	<	t.start();
170	<	t.interrupt();
171	<	} catch(Exception e){
172	<	unexpectedException();
173	<	}
150	>	public void testIsQueuedNPE() {
151	>	final Mutex sync = new Mutex();
152	>	try {
153	>	sync.isQueued(null);
154	>	shouldThrow();
155	>	} catch (NullPointerException success) {}
156		}
157
158	+	/**
159	+	* isQueued reports whether a thread is queued.
160	+	*/
161	+	public void testIsQueued() throws InterruptedException {
162	+	final Mutex sync = new Mutex();
163	+	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
164	+	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
165	+	assertFalse(sync.isQueued(t1));
166	+	assertFalse(sync.isQueued(t2));
167	+	sync.acquire(1);
168	+	t1.start();
169	+	Thread.sleep(SHORT_DELAY_MS);
170	+	assertTrue(sync.isQueued(t1));
171	+	t2.start();
172	+	Thread.sleep(SHORT_DELAY_MS);
173	+	assertTrue(sync.isQueued(t1));
174	+	assertTrue(sync.isQueued(t2));
175	+	t1.interrupt();
176	+	Thread.sleep(SHORT_DELAY_MS);
177	+	assertFalse(sync.isQueued(t1));
178	+	assertTrue(sync.isQueued(t2));
179	+	sync.release(1);
180	+	Thread.sleep(SHORT_DELAY_MS);
181	+	assertFalse(sync.isQueued(t1));
182	+	Thread.sleep(SHORT_DELAY_MS);
183	+	assertFalse(sync.isQueued(t2));
184	+	t1.join();
185	+	t2.join();
186	+	}
187
188		/**
189	<	* TryLock on a locked lock fails
189	>	* getFirstQueuedThread returns first waiting thread or null if none
190		*/
191	<	public void testTryLockWhenLocked() {
192	<	final Mutex lock = new Mutex();
193	<	lock.lock();
194	<	Thread t = new Thread(new Runnable() {
195	<	public void run() {
196	<	threadAssertFalse(lock.tryLock());
197	<	}
198	<	});
199	<	try {
200	<	t.start();
201	<	t.join();
202	<	lock.unlock();
203	<	} catch(Exception e){
204	<	unexpectedException();
205	<	}
206	<	}
191	>	public void testGetFirstQueuedThread() throws InterruptedException {
192	>	final Mutex sync = new Mutex();
193	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
194	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
195	>	assertNull(sync.getFirstQueuedThread());
196	>	sync.acquire(1);
197	>	t1.start();
198	>	Thread.sleep(SHORT_DELAY_MS);
199	>	assertEquals(t1, sync.getFirstQueuedThread());
200	>	t2.start();
201	>	Thread.sleep(SHORT_DELAY_MS);
202	>	assertEquals(t1, sync.getFirstQueuedThread());
203	>	t1.interrupt();
204	>	Thread.sleep(SHORT_DELAY_MS);
205	>	Thread.sleep(SHORT_DELAY_MS);
206	>	assertEquals(t2, sync.getFirstQueuedThread());
207	>	sync.release(1);
208	>	Thread.sleep(SHORT_DELAY_MS);
209	>	assertNull(sync.getFirstQueuedThread());
210	>	t1.join();
211	>	t2.join();
212	>	}
213	>
214
215		/**
216	<	* Timed tryLock on a locked lock times out
216	>	* hasContended reports false if no thread has ever blocked, else true
217		*/
218	<	public void testTryLock_Timeout() {
219	<	final Mutex lock = new Mutex();
220	<	lock.lock();
221	<	Thread t = new Thread(new Runnable() {
222	<	public void run() {
223	<	try {
224	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
225	<	} catch (Exception ex) {
226	<	threadUnexpectedException();
227	<	}
228	<	}
229	<	});
230	<	try {
231	<	t.start();
232	<	t.join();
233	<	lock.unlock();
234	<	} catch(Exception e){
235	<	unexpectedException();
236	<	}
237	<	}
220	<
221	<
222	<	/**
223	<	* isLocked is true when locked and false when not
224	<	*/
225	<	public void testIsLocked() {
226	<	final Mutex lock = new Mutex();
227	<	lock.lock();
228	<	assertTrue(lock.isLocked());
229	<	lock.unlock();
230	<	assertFalse(lock.isLocked());
231	<	Thread t = new Thread(new Runnable() {
232	<	public void run() {
233	<	lock.lock();
234	<	try {
235	<	Thread.sleep(SMALL_DELAY_MS);
236	<	}
237	<	catch(Exception e) {
238	<	threadUnexpectedException();
239	<	}
240	<	lock.unlock();
241	<	}
242	<	});
243	<	try {
244	<	t.start();
245	<	Thread.sleep(SHORT_DELAY_MS);
246	<	assertTrue(lock.isLocked());
247	<	t.join();
248	<	assertFalse(lock.isLocked());
249	<	} catch(Exception e){
250	<	unexpectedException();
251	<	}
218	>	public void testHasContended() throws InterruptedException {
219	>	final Mutex sync = new Mutex();
220	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
221	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
222	>	assertFalse(sync.hasContended());
223	>	sync.acquire(1);
224	>	t1.start();
225	>	Thread.sleep(SHORT_DELAY_MS);
226	>	assertTrue(sync.hasContended());
227	>	t2.start();
228	>	Thread.sleep(SHORT_DELAY_MS);
229	>	assertTrue(sync.hasContended());
230	>	t1.interrupt();
231	>	Thread.sleep(SHORT_DELAY_MS);
232	>	assertTrue(sync.hasContended());
233	>	sync.release(1);
234	>	Thread.sleep(SHORT_DELAY_MS);
235	>	assertTrue(sync.hasContended());
236	>	t1.join();
237	>	t2.join();
238		}
239
240	+	/**
241	+	* getQueuedThreads includes waiting threads
242	+	*/
243	+	public void testGetQueuedThreads() throws InterruptedException {
244	+	final Mutex sync = new Mutex();
245	+	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
246	+	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
247	+	assertTrue(sync.getQueuedThreads().isEmpty());
248	+	sync.acquire(1);
249	+	assertTrue(sync.getQueuedThreads().isEmpty());
250	+	t1.start();
251	+	Thread.sleep(SHORT_DELAY_MS);
252	+	assertTrue(sync.getQueuedThreads().contains(t1));
253	+	t2.start();
254	+	Thread.sleep(SHORT_DELAY_MS);
255	+	assertTrue(sync.getQueuedThreads().contains(t1));
256	+	assertTrue(sync.getQueuedThreads().contains(t2));
257	+	t1.interrupt();
258	+	Thread.sleep(SHORT_DELAY_MS);
259	+	assertFalse(sync.getQueuedThreads().contains(t1));
260	+	assertTrue(sync.getQueuedThreads().contains(t2));
261	+	sync.release(1);
262	+	Thread.sleep(SHORT_DELAY_MS);
263	+	assertTrue(sync.getQueuedThreads().isEmpty());
264	+	t1.join();
265	+	t2.join();
266	+	}
267
268		/**
269	<	* lockInterruptibly is interruptible.
269	>	* getExclusiveQueuedThreads includes waiting threads
270		*/
271	<	public void testLockInterruptibly1() {
272	<	final Mutex lock = new Mutex();
273	<	lock.lock();
274	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
275	<	try {
276	<	t.start();
277	<	t.interrupt();
278	<	lock.unlock();
279	<	t.join();
280	<	} catch(Exception e){
281	<	unexpectedException();
282	<	}
283	<	}
271	>	public void testGetExclusiveQueuedThreads() throws InterruptedException {
272	>	final Mutex sync = new Mutex();
273	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
274	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
275	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
276	>	sync.acquire(1);
277	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
278	>	t1.start();
279	>	Thread.sleep(SHORT_DELAY_MS);
280	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
281	>	t2.start();
282	>	Thread.sleep(SHORT_DELAY_MS);
283	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
284	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
285	>	t1.interrupt();
286	>	Thread.sleep(SHORT_DELAY_MS);
287	>	assertFalse(sync.getExclusiveQueuedThreads().contains(t1));
288	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
289	>	sync.release(1);
290	>	Thread.sleep(SHORT_DELAY_MS);
291	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
292	>	t1.join();
293	>	t2.join();
294	>	}
295
296		/**
297	<	* lockInterruptibly succeeds when unlocked, else is interruptible
297	>	* getSharedQueuedThreads does not include exclusively waiting threads
298		*/
299	<	public void testLockInterruptibly2() {
300	<	final Mutex lock = new Mutex();
301	<	try {
302	<	lock.lockInterruptibly();
303	<	} catch(Exception e) {
304	<	unexpectedException();
305	<	}
306	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
307	<	try {
308	<	t.start();
309	<	t.interrupt();
310	<	assertTrue(lock.isLocked());
311	<	t.join();
312	<	} catch(Exception e){
313	<	unexpectedException();
314	<	}
299	>	public void testGetSharedQueuedThreads() throws InterruptedException {
300	>	final Mutex sync = new Mutex();
301	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
302	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
303	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
304	>	sync.acquire(1);
305	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
306	>	t1.start();
307	>	Thread.sleep(SHORT_DELAY_MS);
308	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
309	>	t2.start();
310	>	Thread.sleep(SHORT_DELAY_MS);
311	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
312	>	t1.interrupt();
313	>	Thread.sleep(SHORT_DELAY_MS);
314	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
315	>	sync.release(1);
316	>	Thread.sleep(SHORT_DELAY_MS);
317	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
318	>	t1.join();
319	>	t2.join();
320	>	}
321	>
322	>	/**
323	>	* tryAcquireNanos is interruptible.
324	>	*/
325	>	public void testInterruptedException2() throws InterruptedException {
326	>	final Mutex sync = new Mutex();
327	>	sync.acquire(1);
328	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
329	>	public void realRun() throws InterruptedException {
330	>	sync.tryAcquireNanos(1, MILLISECONDS.toNanos(MEDIUM_DELAY_MS));
331	>	}});
332	>
333	>	t.start();
334	>	Thread.sleep(SHORT_DELAY_MS);
335	>	t.interrupt();
336	>	t.join();
337	>	}
338	>
339	>
340	>	/**
341	>	* TryAcquire on exclusively held sync fails
342	>	*/
343	>	public void testTryAcquireWhenSynced() throws InterruptedException {
344	>	final Mutex sync = new Mutex();
345	>	sync.acquire(1);
346	>	Thread t = new Thread(new CheckedRunnable() {
347	>	public void realRun() {
348	>	threadAssertFalse(sync.tryAcquire(1));
349	>	}});
350	>
351	>	t.start();
352	>	t.join();
353	>	sync.release(1);
354	>	}
355	>
356	>	/**
357	>	* tryAcquireNanos on an exclusively held sync times out
358	>	*/
359	>	public void testAcquireNanos_Timeout() throws InterruptedException {
360	>	final Mutex sync = new Mutex();
361	>	sync.acquire(1);
362	>	Thread t = new Thread(new CheckedRunnable() {
363	>	public void realRun() throws InterruptedException {
364	>	long nanos = MILLISECONDS.toNanos(SHORT_DELAY_MS);
365	>	assertFalse(sync.tryAcquireNanos(1, nanos));
366	>	}});
367	>
368	>	t.start();
369	>	t.join();
370	>	sync.release(1);
371	>	}
372	>
373	>
374	>	/**
375	>	* getState is true when acquired and false when not
376	>	*/
377	>	public void testGetState() throws InterruptedException {
378	>	final Mutex sync = new Mutex();
379	>	sync.acquire(1);
380	>	assertTrue(sync.isHeldExclusively());
381	>	sync.release(1);
382	>	assertFalse(sync.isHeldExclusively());
383	>	Thread t = new Thread(new CheckedRunnable() {
384	>	public void realRun() throws InterruptedException {
385	>	sync.acquire(1);
386	>	Thread.sleep(SMALL_DELAY_MS);
387	>	sync.release(1);
388	>	}});
389	>
390	>	t.start();
391	>	Thread.sleep(SHORT_DELAY_MS);
392	>	assertTrue(sync.isHeldExclusively());
393	>	t.join();
394	>	assertFalse(sync.isHeldExclusively());
395	>	}
396	>
397	>
398	>	/**
399	>	* acquireInterruptibly is interruptible.
400	>	*/
401	>	public void testAcquireInterruptibly1() throws InterruptedException {
402	>	final Mutex sync = new Mutex();
403	>	sync.acquire(1);
404	>	Thread t = new Thread(new InterruptedSyncRunnable(sync));
405	>
406	>	t.start();
407	>	Thread.sleep(SHORT_DELAY_MS);
408	>	t.interrupt();
409	>	Thread.sleep(SHORT_DELAY_MS);
410	>	sync.release(1);
411	>	t.join();
412	>	}
413	>
414	>	/**
415	>	* acquireInterruptibly succeeds when released, else is interruptible
416	>	*/
417	>	public void testAcquireInterruptibly2() throws InterruptedException {
418	>	final Mutex sync = new Mutex();
419	>	sync.acquireInterruptibly(1);
420	>	Thread t = new Thread(new InterruptedSyncRunnable(sync));
421	>	t.start();
422	>	Thread.sleep(SHORT_DELAY_MS);
423	>	t.interrupt();
424	>	assertTrue(sync.isHeldExclusively());
425	>	t.join();
426	>	}
427	>
428	>	/**
429	>	* owns is true for a condition created by sync else false
430	>	*/
431	>	public void testOwns() {
432	>	final Mutex sync = new Mutex();
433	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
434	>	final Mutex sync2 = new Mutex();
435	>	assertTrue(sync.owns(c));
436	>	assertFalse(sync2.owns(c));
437		}
438
439		/**
440	<	* Calling await without holding lock throws IllegalMonitorStateException
440	>	* Calling await without holding sync throws IllegalMonitorStateException
441		*/
442	<	public void testAwait_IllegalMonitor() {
443	<	final Mutex lock = new Mutex();
444	<	final Condition c = lock.newCondition();
442	>	public void testAwait_IllegalMonitor() throws InterruptedException {
443	>	final Mutex sync = new Mutex();
444	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
445		try {
446		c.await();
447		shouldThrow();
448	<	}
303	<	catch (IllegalMonitorStateException success) {
304	<	}
305	<	catch (Exception ex) {
306	<	unexpectedException();
307	<	}
448	>	} catch (IllegalMonitorStateException success) {}
449		}
450
451		/**
452	<	* Calling signal without holding lock throws IllegalMonitorStateException
452	>	* Calling signal without holding sync throws IllegalMonitorStateException
453		*/
454		public void testSignal_IllegalMonitor() {
455	<	final Mutex lock = new Mutex();
456	<	final Condition c = lock.newCondition();
455	>	final Mutex sync = new Mutex();
456	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
457		try {
458		c.signal();
459		shouldThrow();
460	<	}
320	<	catch (IllegalMonitorStateException success) {
321	<	}
322	<	catch (Exception ex) {
323	<	unexpectedException();
324	<	}
460	>	} catch (IllegalMonitorStateException success) {}
461		}
462
463		/**
464		* awaitNanos without a signal times out
465		*/
466	<	public void testAwaitNanos_Timeout() {
467	<	final Mutex lock = new Mutex();
468	<	final Condition c = lock.newCondition();
469	<	try {
470	<	lock.lock();
471	<	long t = c.awaitNanos(100);
472	<	assertTrue(t <= 0);
337	<	lock.unlock();
338	<	}
339	<	catch (Exception ex) {
340	<	unexpectedException();
341	<	}
466	>	public void testAwaitNanos_Timeout() throws InterruptedException {
467	>	final Mutex sync = new Mutex();
468	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
469	>	sync.acquire(1);
470	>	long t = c.awaitNanos(100);
471	>	assertTrue(t <= 0);
472	>	sync.release(1);
473		}
474
475		/**
476	<	*  timed await without a signal times out
476	>	*  Timed await without a signal times out
477		*/
478	<	public void testAwait_Timeout() {
479	<	final Mutex lock = new Mutex();
480	<	final Condition c = lock.newCondition();
481	<	try {
482	<	lock.lock();
483	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
353	<	lock.unlock();
354	<	}
355	<	catch (Exception ex) {
356	<	unexpectedException();
357	<	}
478	>	public void testAwait_Timeout() throws InterruptedException {
479	>	final Mutex sync = new Mutex();
480	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
481	>	sync.acquire(1);
482	>	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
483	>	sync.release(1);
484		}
485
486		/**
487		* awaitUntil without a signal times out
488		*/
489	<	public void testAwaitUntil_Timeout() {
490	<	final Mutex lock = new Mutex();
491	<	final Condition c = lock.newCondition();
492	<	try {
493	<	lock.lock();
494	<	java.util.Date d = new java.util.Date();
495	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
370	<	lock.unlock();
371	<	}
372	<	catch (Exception ex) {
373	<	unexpectedException();
374	<	}
489	>	public void testAwaitUntil_Timeout() throws InterruptedException {
490	>	final Mutex sync = new Mutex();
491	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
492	>	sync.acquire(1);
493	>	java.util.Date d = new java.util.Date();
494	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
495	>	sync.release(1);
496		}
497
498		/**
499		* await returns when signalled
500		*/
501	<	public void testAwait() {
502	<	final Mutex lock = new Mutex();
503	<	final Condition c = lock.newCondition();
504	<	Thread t = new Thread(new Runnable() {
505	<	public void run() {
506	<	try {
507	<	lock.lock();
508	<	c.await();
509	<	lock.unlock();
510	<	}
511	<	catch(InterruptedException e) {
512	<	threadUnexpectedException();
513	<	}
514	<	}
515	<	});
516	<
517	<	try {
518	<	t.start();
519	<	Thread.sleep(SHORT_DELAY_MS);
520	<	lock.lock();
521	<	c.signal();
522	<	lock.unlock();
523	<	t.join(SHORT_DELAY_MS);
524	<	assertFalse(t.isAlive());
525	<	}
526	<	catch (Exception ex) {
527	<	unexpectedException();
528	<	}
501	>	public void testAwait() throws InterruptedException {
502	>	final Mutex sync = new Mutex();
503	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
504	>	Thread t = new Thread(new CheckedRunnable() {
505	>	public void realRun() throws InterruptedException {
506	>	sync.acquire(1);
507	>	c.await();
508	>	sync.release(1);
509	>	}});
510	>
511	>	t.start();
512	>	Thread.sleep(SHORT_DELAY_MS);
513	>	sync.acquire(1);
514	>	c.signal();
515	>	sync.release(1);
516	>	t.join(SHORT_DELAY_MS);
517	>	assertFalse(t.isAlive());
518	>	}
519	>
520	>
521	>
522	>	/**
523	>	* hasWaiters throws NPE if null
524	>	*/
525	>	public void testHasWaitersNPE() {
526	>	final Mutex sync = new Mutex();
527	>	try {
528	>	sync.hasWaiters(null);
529	>	shouldThrow();
530	>	} catch (NullPointerException success) {}
531	>	}
532	>
533	>	/**
534	>	* getWaitQueueLength throws NPE if null
535	>	*/
536	>	public void testGetWaitQueueLengthNPE() {
537	>	final Mutex sync = new Mutex();
538	>	try {
539	>	sync.getWaitQueueLength(null);
540	>	shouldThrow();
541	>	} catch (NullPointerException success) {}
542	>	}
543	>
544	>
545	>	/**
546	>	* getWaitingThreads throws NPE if null
547	>	*/
548	>	public void testGetWaitingThreadsNPE() {
549	>	final Mutex sync = new Mutex();
550	>	try {
551	>	sync.getWaitingThreads(null);
552	>	shouldThrow();
553	>	} catch (NullPointerException success) {}
554	>	}
555	>
556	>
557	>	/**
558	>	* hasWaiters throws IAE if not owned
559	>	*/
560	>	public void testHasWaitersIAE() {
561	>	final Mutex sync = new Mutex();
562	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
563	>	final Mutex sync2 = new Mutex();
564	>	try {
565	>	sync2.hasWaiters(c);
566	>	shouldThrow();
567	>	} catch (IllegalArgumentException success) {}
568	>	}
569	>
570	>	/**
571	>	* hasWaiters throws IMSE if not synced
572	>	*/
573	>	public void testHasWaitersIMSE() {
574	>	final Mutex sync = new Mutex();
575	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
576	>	try {
577	>	sync.hasWaiters(c);
578	>	shouldThrow();
579	>	} catch (IllegalMonitorStateException success) {}
580	>	}
581	>
582	>
583	>	/**
584	>	* getWaitQueueLength throws IAE if not owned
585	>	*/
586	>	public void testGetWaitQueueLengthIAE() {
587	>	final Mutex sync = new Mutex();
588	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
589	>	final Mutex sync2 = new Mutex();
590	>	try {
591	>	sync2.getWaitQueueLength(c);
592	>	shouldThrow();
593	>	} catch (IllegalArgumentException success) {}
594	>	}
595	>
596	>	/**
597	>	* getWaitQueueLength throws IMSE if not synced
598	>	*/
599	>	public void testGetWaitQueueLengthIMSE() {
600	>	final Mutex sync = new Mutex();
601	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
602	>	try {
603	>	sync.getWaitQueueLength(c);
604	>	shouldThrow();
605	>	} catch (IllegalMonitorStateException success) {}
606	>	}
607	>
608	>
609	>	/**
610	>	* getWaitingThreads throws IAE if not owned
611	>	*/
612	>	public void testGetWaitingThreadsIAE() {
613	>	final Mutex sync = new Mutex();
614	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
615	>	final Mutex sync2 = new Mutex();
616	>	try {
617	>	sync2.getWaitingThreads(c);
618	>	shouldThrow();
619	>	} catch (IllegalArgumentException success) {}
620	>	}
621	>
622	>	/**
623	>	* getWaitingThreads throws IMSE if not synced
624	>	*/
625	>	public void testGetWaitingThreadsIMSE() {
626	>	final Mutex sync = new Mutex();
627	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
628	>	try {
629	>	sync.getWaitingThreads(c);
630	>	shouldThrow();
631	>	} catch (IllegalMonitorStateException success) {}
632	>	}
633	>
634	>
635	>
636	>	/**
637	>	* hasWaiters returns true when a thread is waiting, else false
638	>	*/
639	>	public void testHasWaiters() throws InterruptedException {
640	>	final Mutex sync = new Mutex();
641	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
642	>	Thread t = new Thread(new CheckedRunnable() {
643	>	public void realRun() throws InterruptedException {
644	>	sync.acquire(1);
645	>	threadAssertFalse(sync.hasWaiters(c));
646	>	threadAssertEquals(0, sync.getWaitQueueLength(c));
647	>	c.await();
648	>	sync.release(1);
649	>	}});
650	>
651	>	t.start();
652	>	Thread.sleep(SHORT_DELAY_MS);
653	>	sync.acquire(1);
654	>	assertTrue(sync.hasWaiters(c));
655	>	assertEquals(1, sync.getWaitQueueLength(c));
656	>	c.signal();
657	>	sync.release(1);
658	>	Thread.sleep(SHORT_DELAY_MS);
659	>	sync.acquire(1);
660	>	assertFalse(sync.hasWaiters(c));
661	>	assertEquals(0, sync.getWaitQueueLength(c));
662	>	sync.release(1);
663	>	t.join(SHORT_DELAY_MS);
664	>	assertFalse(t.isAlive());
665	>	}
666	>
667	>	/**
668	>	* getWaitQueueLength returns number of waiting threads
669	>	*/
670	>	public void testGetWaitQueueLength() throws InterruptedException {
671	>	final Mutex sync = new Mutex();
672	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
673	>	Thread t1 = new Thread(new CheckedRunnable() {
674	>	public void realRun() throws InterruptedException {
675	>	sync.acquire(1);
676	>	threadAssertFalse(sync.hasWaiters(c));
677	>	threadAssertEquals(0, sync.getWaitQueueLength(c));
678	>	c.await();
679	>	sync.release(1);
680	>	}});
681	>
682	>	Thread t2 = new Thread(new CheckedRunnable() {
683	>	public void realRun() throws InterruptedException {
684	>	sync.acquire(1);
685	>	threadAssertTrue(sync.hasWaiters(c));
686	>	threadAssertEquals(1, sync.getWaitQueueLength(c));
687	>	c.await();
688	>	sync.release(1);
689	>	}});
690	>
691	>	t1.start();
692	>	Thread.sleep(SHORT_DELAY_MS);
693	>	t2.start();
694	>	Thread.sleep(SHORT_DELAY_MS);
695	>	sync.acquire(1);
696	>	assertTrue(sync.hasWaiters(c));
697	>	assertEquals(2, sync.getWaitQueueLength(c));
698	>	c.signalAll();
699	>	sync.release(1);
700	>	Thread.sleep(SHORT_DELAY_MS);
701	>	sync.acquire(1);
702	>	assertFalse(sync.hasWaiters(c));
703	>	assertEquals(0, sync.getWaitQueueLength(c));
704	>	sync.release(1);
705	>	t1.join(SHORT_DELAY_MS);
706	>	t2.join(SHORT_DELAY_MS);
707	>	assertFalse(t1.isAlive());
708	>	assertFalse(t2.isAlive());
709	>	}
710	>
711	>	/**
712	>	* getWaitingThreads returns only and all waiting threads
713	>	*/
714	>	public void testGetWaitingThreads() throws InterruptedException {
715	>	final Mutex sync = new Mutex();
716	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
717	>	Thread t1 = new Thread(new CheckedRunnable() {
718	>	public void realRun() throws InterruptedException {
719	>	sync.acquire(1);
720	>	threadAssertTrue(sync.getWaitingThreads(c).isEmpty());
721	>	c.await();
722	>	sync.release(1);
723	>	}});
724	>
725	>	Thread t2 = new Thread(new CheckedRunnable() {
726	>	public void realRun() throws InterruptedException {
727	>	sync.acquire(1);
728	>	threadAssertFalse(sync.getWaitingThreads(c).isEmpty());
729	>	c.await();
730	>	sync.release(1);
731	>	}});
732	>
733	>	sync.acquire(1);
734	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
735	>	sync.release(1);
736	>	t1.start();
737	>	Thread.sleep(SHORT_DELAY_MS);
738	>	t2.start();
739	>	Thread.sleep(SHORT_DELAY_MS);
740	>	sync.acquire(1);
741	>	assertTrue(sync.hasWaiters(c));
742	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
743	>	assertTrue(sync.getWaitingThreads(c).contains(t2));
744	>	c.signalAll();
745	>	sync.release(1);
746	>	Thread.sleep(SHORT_DELAY_MS);
747	>	sync.acquire(1);
748	>	assertFalse(sync.hasWaiters(c));
749	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
750	>	sync.release(1);
751	>	t1.join(SHORT_DELAY_MS);
752	>	t2.join(SHORT_DELAY_MS);
753	>	assertFalse(t1.isAlive());
754	>	assertFalse(t2.isAlive());
755	>	}
756	>
757	>
758	>
759	>	/**
760	>	* awaitUninterruptibly doesn't abort on interrupt
761	>	*/
762	>	public void testAwaitUninterruptibly() throws InterruptedException {
763	>	final Mutex sync = new Mutex();
764	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
765	>	Thread t = new Thread(new CheckedRunnable() {
766	>	public void realRun() {
767	>	sync.acquire(1);
768	>	c.awaitUninterruptibly();
769	>	sync.release(1);
770	>	}});
771	>
772	>	t.start();
773	>	Thread.sleep(SHORT_DELAY_MS);
774	>	t.interrupt();
775	>	sync.acquire(1);
776	>	c.signal();
777	>	sync.release(1);
778	>	t.join(SHORT_DELAY_MS);
779	>	assertFalse(t.isAlive());
780	>	}
781	>
782	>	/**
783	>	* await is interruptible
784	>	*/
785	>	public void testAwait_Interrupt() throws InterruptedException {
786	>	final Mutex sync = new Mutex();
787	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
788	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
789	>	public void realRun() throws InterruptedException {
790	>	sync.acquire(1);
791	>	c.await();
792	>	}});
793	>
794	>	t.start();
795	>	Thread.sleep(SHORT_DELAY_MS);
796	>	t.interrupt();
797	>	t.join(SHORT_DELAY_MS);
798	>	assertFalse(t.isAlive());
799	>	}
800	>
801	>	/**
802	>	* awaitNanos is interruptible
803	>	*/
804	>	public void testAwaitNanos_Interrupt() throws InterruptedException {
805	>	final Mutex sync = new Mutex();
806	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
807	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
808	>	public void realRun() throws InterruptedException {
809	>	sync.acquire(1);
810	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
811	>	}});
812	>
813	>	t.start();
814	>	Thread.sleep(SHORT_DELAY_MS);
815	>	t.interrupt();
816	>	t.join(SHORT_DELAY_MS);
817	>	assertFalse(t.isAlive());
818	>	}
819	>
820	>	/**
821	>	* awaitUntil is interruptible
822	>	*/
823	>	public void testAwaitUntil_Interrupt() throws InterruptedException {
824	>	final Mutex sync = new Mutex();
825	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
826	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
827	>	public void realRun() throws InterruptedException {
828	>	sync.acquire(1);
829	>	java.util.Date d = new java.util.Date();
830	>	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
831	>	}});
832	>
833	>	t.start();
834	>	Thread.sleep(SHORT_DELAY_MS);
835	>	t.interrupt();
836	>	t.join(SHORT_DELAY_MS);
837	>	assertFalse(t.isAlive());
838	>	}
839	>
840	>	/**
841	>	* signalAll wakes up all threads
842	>	*/
843	>	public void testSignalAll() throws InterruptedException {
844	>	final Mutex sync = new Mutex();
845	>	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
846	>	Thread t1 = new Thread(new CheckedRunnable() {
847	>	public void realRun() throws InterruptedException {
848	>	sync.acquire(1);
849	>	c.await();
850	>	sync.release(1);
851	>	}});
852	>
853	>	Thread t2 = new Thread(new CheckedRunnable() {
854	>	public void realRun() throws InterruptedException {
855	>	sync.acquire(1);
856	>	c.await();
857	>	sync.release(1);
858	>	}});
859	>
860	>	t1.start();
861	>	t2.start();
862	>	Thread.sleep(SHORT_DELAY_MS);
863	>	sync.acquire(1);
864	>	c.signalAll();
865	>	sync.release(1);
866	>	t1.join(SHORT_DELAY_MS);
867	>	t2.join(SHORT_DELAY_MS);
868	>	assertFalse(t1.isAlive());
869	>	assertFalse(t2.isAlive());
870	>	}
871	>
872	>
873	>	/**
874	>	* toString indicates current state
875	>	*/
876	>	public void testToString() {
877	>	Mutex sync = new Mutex();
878	>	String us = sync.toString();
879	>	assertTrue(us.indexOf("State = 0") >= 0);
880	>	sync.acquire(1);
881	>	String ls = sync.toString();
882	>	assertTrue(ls.indexOf("State = 1") >= 0);
883	>	}
884	>
885	>	/**
886	>	* A serialized AQS deserializes with current state
887	>	*/
888	>	public void testSerialization() throws Exception {
889	>	Mutex l = new Mutex();
890	>	l.acquire(1);
891	>	assertTrue(l.isHeldExclusively());
892	>
893	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
894	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
895	>	out.writeObject(l);
896	>	out.close();
897	>
898	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
899	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
900	>	Mutex r = (Mutex) in.readObject();
901	>	assertTrue(r.isHeldExclusively());
902	>	}
903	>
904	>
905	>	/**
906	>	* tryReleaseShared setting state changes getState
907	>	*/
908	>	public void testGetStateWithReleaseShared() {
909	>	final BooleanLatch l = new BooleanLatch();
910	>	assertFalse(l.isSignalled());
911	>	l.releaseShared(0);
912	>	assertTrue(l.isSignalled());
913		}
914	<
914	>
915	>	/**
916	>	* releaseShared has no effect when already signalled
917	>	*/
918	>	public void testReleaseShared() {
919	>	final BooleanLatch l = new BooleanLatch();
920	>	assertFalse(l.isSignalled());
921	>	l.releaseShared(0);
922	>	assertTrue(l.isSignalled());
923	>	l.releaseShared(0);
924	>	assertTrue(l.isSignalled());
925	>	}
926	>
927	>	/**
928	>	* acquireSharedInterruptibly returns after release, but not before
929	>	*/
930	>	public void testAcquireSharedInterruptibly() throws InterruptedException {
931	>	final BooleanLatch l = new BooleanLatch();
932	>
933	>	Thread t = new Thread(new CheckedRunnable() {
934	>	public void realRun() throws InterruptedException {
935	>	threadAssertFalse(l.isSignalled());
936	>	l.acquireSharedInterruptibly(0);
937	>	threadAssertTrue(l.isSignalled());
938	>	}});
939	>
940	>	t.start();
941	>	assertFalse(l.isSignalled());
942	>	Thread.sleep(SHORT_DELAY_MS);
943	>	l.releaseShared(0);
944	>	assertTrue(l.isSignalled());
945	>	t.join();
946	>	}
947	>
948	>
949	>	/**
950	>	* acquireSharedTimed returns after release
951	>	*/
952	>	public void testAsquireSharedTimed() throws InterruptedException {
953	>	final BooleanLatch l = new BooleanLatch();
954	>
955	>	Thread t = new Thread(new CheckedRunnable() {
956	>	public void realRun() throws InterruptedException {
957	>	assertFalse(l.isSignalled());
958	>	long nanos = MILLISECONDS.toNanos(MEDIUM_DELAY_MS);
959	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
960	>	assertTrue(l.isSignalled());
961	>	}});
962	>
963	>	t.start();
964	>	assertFalse(l.isSignalled());
965	>	Thread.sleep(SHORT_DELAY_MS);
966	>	l.releaseShared(0);
967	>	assertTrue(l.isSignalled());
968	>	t.join();
969	>	}
970	>
971	>	/**
972	>	* acquireSharedInterruptibly throws IE if interrupted before released
973	>	*/
974	>	public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException {
975	>	final BooleanLatch l = new BooleanLatch();
976	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
977	>	public void realRun() throws InterruptedException {
978	>	threadAssertFalse(l.isSignalled());
979	>	l.acquireSharedInterruptibly(0);
980	>	}});
981	>
982	>	t.start();
983	>	assertFalse(l.isSignalled());
984	>	t.interrupt();
985	>	t.join();
986	>	}
987	>
988	>	/**
989	>	* acquireSharedTimed throws IE if interrupted before released
990	>	*/
991	>	public void testAcquireSharedNanos_InterruptedException() throws InterruptedException {
992	>	final BooleanLatch l = new BooleanLatch();
993	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
994	>	public void realRun() throws InterruptedException {
995	>	assertFalse(l.isSignalled());
996	>	long nanos = MILLISECONDS.toNanos(SMALL_DELAY_MS);
997	>	l.tryAcquireSharedNanos(0, nanos);
998	>	}});
999	>
1000	>	t.start();
1001	>	Thread.sleep(SHORT_DELAY_MS);
1002	>	assertFalse(l.isSignalled());
1003	>	t.interrupt();
1004	>	t.join();
1005	>	}
1006	>
1007	>	/**
1008	>	* acquireSharedTimed times out if not released before timeout
1009	>	*/
1010	>	public void testAcquireSharedNanos_Timeout() throws InterruptedException {
1011	>	final BooleanLatch l = new BooleanLatch();
1012	>	Thread t = new Thread(new CheckedRunnable() {
1013	>	public void realRun() throws InterruptedException {
1014	>	assertFalse(l.isSignalled());
1015	>	long nanos = MILLISECONDS.toNanos(SMALL_DELAY_MS);
1016	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1017	>	}});
1018	>
1019	>	t.start();
1020	>	Thread.sleep(SHORT_DELAY_MS);
1021	>	assertFalse(l.isSignalled());
1022	>	t.join();
1023	>	}
1024	>
1025		}

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