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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.14 by dl, Sat Jan 10 01:41:59 2004 UTC vs.
Revision 1.51 by jsr166, Fri Jul 3 01:56:38 2015 UTC

#	Line 1 | Line 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	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
11
12	<	import junit.framework.*;
13	<	import java.util.*;
14	<	import java.util.concurrent.*;
15	<	import java.util.concurrent.locks.*;
16	<	import java.io.*;
12	>	import java.util.Arrays;
13	>	import java.util.Collection;
14	>	import java.util.HashSet;
15	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer;
16	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject;
17	>
18	>	import junit.framework.AssertionFailedError;
19	>	import junit.framework.Test;
20	>	import junit.framework.TestSuite;
21
22		public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
23		public static void main(String[] args) {
24	<	junit.textui.TestRunner.run (suite());
24	>	main(suite(), args);
25		}
26		public static Test suite() {
27		return new TestSuite(AbstractQueuedSynchronizerTest.class);
28		}
29
30		/**
31	<	* A simple mutex class, adapted from the
32	<	* AbstractQueuedSynchronizer javadoc.  Exclusive acquire tests
33	<	* exercise this as a sample user extension.  Other
34	<	* methods/features of AbstractQueuedSynchronizerTest are tested
35	<	* via other test classes, including those for ReentrantLock,
30	<	* ReentrantReadWriteLock, and Semaphore
31	>	* 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		*/
37		static class Mutex extends AbstractQueuedSynchronizer {
38	<	public boolean isLocked() { return getState() == 1; }
39	<
40	<	public boolean tryAcquireExclusive(int acquires) {
41	<	assertTrue(acquires == 1);
42	<	return compareAndSetState(0, 1);
43	<	}
44	<
45	<	public boolean tryReleaseExclusive(int releases) {
46	<	setState(0);
38	>	/** 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	>
49	>	@Override public boolean tryAcquire(int acquires) {
50	>	assertEquals(LOCKED, acquires);
51	>	return compareAndSetState(UNLOCKED, LOCKED);
52	>	}
53	>
54	>	@Override public boolean tryRelease(int releases) {
55	>	if (getState() != LOCKED) throw new IllegalMonitorStateException();
56	>	assertEquals(LOCKED, releases);
57	>	setState(UNLOCKED);
58		return true;
59		}
60	<
61	<	public void checkConditionAccess(Thread thread) {
62	<	if (getState() == 0) throw new IllegalMonitorStateException();
60	>
61	>	public boolean tryAcquireNanos(long nanos) throws InterruptedException {
62	>	return tryAcquireNanos(LOCKED, nanos);
63	>	}
64	>
65	>	public boolean tryAcquire() {
66	>	return tryAcquire(LOCKED);
67		}
68	<
69	<	public ConditionObject newCondition() { return new ConditionObject(); }
70	<
71	<	public void lock() {
72	<	acquireExclusiveUninterruptibly(1);
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		}
89
57	–
90		/**
91		* A simple latch class, to test shared mode.
92		*/
93	<	static class BooleanLatch extends AbstractQueuedSynchronizer {
93	>	static class BooleanLatch extends AbstractQueuedSynchronizer {
94		public boolean isSignalled() { return getState() != 0; }
95
96		public int tryAcquireShared(int ignore) {
97	<	return isSignalled()? 1 : -1;
97	>	return isSignalled() ? 1 : -1;
98		}
99	<
99	>
100		public boolean tryReleaseShared(int ignore) {
101		setState(1);
102		return true;
#	Line 72 | Line 104 | public class AbstractQueuedSynchronizerT
104		}
105
106		/**
107	<	* A runnable calling acquireExclusiveInterruptibly
107	>	* A runnable calling acquireInterruptibly that does not expect to
108	>	* be interrupted.
109		*/
110	<	class InterruptibleLockRunnable implements Runnable {
111	<	final Mutex lock;
112	<	InterruptibleLockRunnable(Mutex l) { lock = l; }
113	<	public void run() {
114	<	try {
82	<	lock.acquireExclusiveInterruptibly(1);
83	<	} catch(InterruptedException success){}
110	>	class InterruptibleSyncRunnable extends CheckedRunnable {
111	>	final Mutex sync;
112	>	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
113	>	public void realRun() throws InterruptedException {
114	>	sync.acquireInterruptibly();
115		}
116		}
117
118	+	/**
119	+	* A runnable calling acquireInterruptibly that expects to be
120	+	* interrupted.
121	+	*/
122	+	class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
123	+	final Mutex sync;
124	+	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
125	+	public void realRun() throws InterruptedException {
126	+	sync.acquireInterruptibly();
127	+	}
128	+	}
129	+
130	+	/** A constant to clarify calls to checking methods below. */
131	+	static final Thread[] NO_THREADS = new Thread[0];
132
133		/**
134	<	* A runnable calling acquireExclusiveInterruptibly that expects to be
90	<	* interrupted
134	>	* Spin-waits until sync.isQueued(t) becomes true.
135		*/
136	<	class InterruptedLockRunnable implements Runnable {
137	<	final Mutex lock;
138	<	InterruptedLockRunnable(Mutex l) { lock = l; }
139	<	public void run() {
140	<	try {
141	<	lock.acquireExclusiveInterruptibly(1);
98	<	threadShouldThrow();
99	<	} catch(InterruptedException success){}
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		}
143	+	assertTrue(t.isAlive());
144		}
145	<
145	>
146		/**
147	<	* acquireExclusiveUninterruptiblying an releaseExclusiveed lock succeeds
147	>	* Checks that sync has exactly the given queued threads.
148		*/
149	<	public void testAcquireExclusiveUninterruptibly() {
150	<	Mutex rl = new Mutex();
151	<	rl.acquireExclusiveUninterruptibly(1);
152	<	assertTrue(rl.isLocked());
153	<	rl.releaseExclusive(1);
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	<	* tryAcquireExclusive on an releaseExclusiveed lock succeeds
161	>	* Checks that sync has exactly the given (exclusive) queued threads.
162		*/
163	<	public void testTryAcquireExclusive() {
164	<	Mutex rl = new Mutex();
165	<	assertTrue(rl.tryAcquireExclusive(1));
166	<	assertTrue(rl.isLocked());
167	<	rl.releaseExclusive(1);
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	<	* hasQueuedThreads reports whether there are waiting threads
173	>	* Checks that sync has exactly the given (shared) queued threads.
174		*/
175	<	public void testhasQueuedThreads() {
176	<	final Mutex lock = new Mutex();
177	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
178	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
179	<	try {
180	<	assertFalse(lock.hasQueuedThreads());
181	<	lock.acquireExclusiveUninterruptibly(1);
182	<	t1.start();
134	<	Thread.sleep(SHORT_DELAY_MS);
135	<	assertTrue(lock.hasQueuedThreads());
136	<	t2.start();
137	<	Thread.sleep(SHORT_DELAY_MS);
138	<	assertTrue(lock.hasQueuedThreads());
139	<	t1.interrupt();
140	<	Thread.sleep(SHORT_DELAY_MS);
141	<	assertTrue(lock.hasQueuedThreads());
142	<	lock.releaseExclusive(1);
143	<	Thread.sleep(SHORT_DELAY_MS);
144	<	assertFalse(lock.hasQueuedThreads());
145	<	t1.join();
146	<	t2.join();
147	<	} catch(Exception e){
148	<	unexpectedException();
149	<	}
150	<	}
151	<
152	<	/**
153	<	* isQueued(null) throws NPE
154	<	*/
155	<	public void testIsQueuedNPE() {
156	<	final Mutex lock = new Mutex();
157	<	try {
158	<	lock.isQueued(null);
159	<	shouldThrow();
160	<	} catch (NullPointerException success) {
161	<	}
162	<	}
163	<
164	<	/**
165	<	* isQueued reports whether a thread is queued.
166	<	*/
167	<	public void testIsQueued() {
168	<	final Mutex lock = new Mutex();
169	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
170	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
171	<	try {
172	<	assertFalse(lock.isQueued(t1));
173	<	assertFalse(lock.isQueued(t2));
174	<	lock.acquireExclusiveUninterruptibly(1);
175	<	t1.start();
176	<	Thread.sleep(SHORT_DELAY_MS);
177	<	assertTrue(lock.isQueued(t1));
178	<	t2.start();
179	<	Thread.sleep(SHORT_DELAY_MS);
180	<	assertTrue(lock.isQueued(t1));
181	<	assertTrue(lock.isQueued(t2));
182	<	t1.interrupt();
183	<	Thread.sleep(SHORT_DELAY_MS);
184	<	assertFalse(lock.isQueued(t1));
185	<	assertTrue(lock.isQueued(t2));
186	<	lock.releaseExclusive(1);
187	<	Thread.sleep(SHORT_DELAY_MS);
188	<	assertFalse(lock.isQueued(t1));
189	<	assertFalse(lock.isQueued(t2));
190	<	t1.join();
191	<	t2.join();
192	<	} catch(Exception e){
193	<	unexpectedException();
194	<	}
195	<	}
196	<
197	<	/**
198	<	* getFirstQueuedThread returns first waiting thread or null is none
199	<	*/
200	<	public void testGetFirstQueuedThread() {
201	<	final Mutex lock = new Mutex();
202	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
203	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
204	<	try {
205	<	assertNull(lock.getFirstQueuedThread());
206	<	lock.acquireExclusiveUninterruptibly(1);
207	<	t1.start();
208	<	Thread.sleep(SHORT_DELAY_MS);
209	<	assertEquals(t1, lock.getFirstQueuedThread());
210	<	t2.start();
211	<	Thread.sleep(SHORT_DELAY_MS);
212	<	assertEquals(t1, lock.getFirstQueuedThread());
213	<	t1.interrupt();
214	<	Thread.sleep(SHORT_DELAY_MS);
215	<	assertEquals(t2, lock.getFirstQueuedThread());
216	<	lock.releaseExclusive(1);
217	<	Thread.sleep(SHORT_DELAY_MS);
218	<	assertNull(lock.getFirstQueuedThread());
219	<	t1.join();
220	<	t2.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
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	<	* hasContended reports false if no thread has ever blocked, else true
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	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
209	>
210	>	/**
211	>	* Awaits condition using the specified AwaitMethod.
212		*/
213	<	public void testHasContended() {
214	<	final Mutex lock = new Mutex();
215	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
216	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
217	<	try {
218	<	assertFalse(lock.hasContended());
219	<	lock.acquireExclusiveUninterruptibly(1);
220	<	t1.start();
221	<	Thread.sleep(SHORT_DELAY_MS);
222	<	assertTrue(lock.hasContended());
223	<	t2.start();
224	<	Thread.sleep(SHORT_DELAY_MS);
225	<	assertTrue(lock.hasContended());
226	<	t1.interrupt();
227	<	Thread.sleep(SHORT_DELAY_MS);
228	<	assertTrue(lock.hasContended());
229	<	lock.releaseExclusive(1);
230	<	Thread.sleep(SHORT_DELAY_MS);
231	<	assertTrue(lock.hasContended());
232	<	t1.join();
250	<	t2.join();
251	<	} catch(Exception e){
252	<	unexpectedException();
253	<	}
254	<	}
255	<
256	<	/**
257	<	* acquireExclusiveNanos is interruptible.
258	<	*/
259	<	public void testInterruptedException2() {
260	<	final Mutex lock = new Mutex();
261	<	lock.acquireExclusiveUninterruptibly(1);
262	<	Thread t = new Thread(new Runnable() {
263	<	public void run() {
264	<	try {
265	<	lock.acquireExclusiveNanos(1, MEDIUM_DELAY_MS * 1000 * 1000);
266	<	threadShouldThrow();
267	<	} catch(InterruptedException success){}
268	<	}
269	<	});
270	<	try {
271	<	t.start();
272	<	t.interrupt();
273	<	} catch(Exception e){
274	<	unexpectedException();
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	>	default:
232	>	throw new AssertionError();
233		}
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	+	assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS));
253	+	break;
254	+	case awaitUntil:
255	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
256	+	break;
257	+	default:
258	+	throw new UnsupportedOperationException();
259	+	}
260	+	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
261	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
262	+	}
263	+
264	+	/**
265	+	* isHeldExclusively is false upon construction
266	+	*/
267	+	public void testIsHeldExclusively() {
268	+	Mutex sync = new Mutex();
269	+	assertFalse(sync.isHeldExclusively());
270	+	}
271	+
272	+	/**
273	+	* acquiring released sync succeeds
274	+	*/
275	+	public void testAcquire() {
276	+	Mutex sync = new Mutex();
277	+	sync.acquire();
278	+	assertTrue(sync.isHeldExclusively());
279	+	sync.release();
280	+	assertFalse(sync.isHeldExclusively());
281	+	}
282	+
283	+	/**
284	+	* tryAcquire on a released sync succeeds
285	+	*/
286	+	public void testTryAcquire() {
287	+	Mutex sync = new Mutex();
288	+	assertTrue(sync.tryAcquire());
289	+	assertTrue(sync.isHeldExclusively());
290	+	sync.release();
291	+	assertFalse(sync.isHeldExclusively());
292	+	}
293	+
294	+	/**
295	+	* hasQueuedThreads reports whether there are waiting threads
296	+	*/
297	+	public void testHasQueuedThreads() {
298	+	final Mutex sync = new Mutex();
299	+	assertFalse(sync.hasQueuedThreads());
300	+	sync.acquire();
301	+	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
302	+	waitForQueuedThread(sync, t1);
303	+	assertTrue(sync.hasQueuedThreads());
304	+	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
305	+	waitForQueuedThread(sync, t2);
306	+	assertTrue(sync.hasQueuedThreads());
307	+	t1.interrupt();
308	+	awaitTermination(t1);
309	+	assertTrue(sync.hasQueuedThreads());
310	+	sync.release();
311	+	awaitTermination(t2);
312	+	assertFalse(sync.hasQueuedThreads());
313	+	}
314
315		/**
316	<	* TryAcquireExclusive on a locked lock fails
317	<	*/
318	<	public void testTryAcquireExclusiveWhenLocked() {
319	<	final Mutex lock = new Mutex();
320	<	lock.acquireExclusiveUninterruptibly(1);
321	<	Thread t = new Thread(new Runnable() {
322	<	public void run() {
323	<	threadAssertFalse(lock.tryAcquireExclusive(1));
324	<	}
325	<	});
326	<	try {
327	<	t.start();
328	<	t.join();
329	<	lock.releaseExclusive(1);
330	<	} catch(Exception e){
331	<	unexpectedException();
332	<	}
333	<	}
334	<
335	<	/**
336	<	* acquireExclusiveNanos on a locked lock times out
337	<	*/
338	<	public void testAcquireExclusiveNanos_Timeout() {
339	<	final Mutex lock = new Mutex();
340	<	lock.acquireExclusiveUninterruptibly(1);
341	<	Thread t = new Thread(new Runnable() {
342	<	public void run() {
343	<	try {
344	<	threadAssertFalse(lock.acquireExclusiveNanos(1, 1000 * 1000));
345	<	} catch (Exception ex) {
346	<	threadUnexpectedException();
347	<	}
348	<	}
349	<	});
350	<	try {
351	<	t.start();
352	<	t.join();
353	<	lock.releaseExclusive(1);
354	<	} catch(Exception e){
355	<	unexpectedException();
356	<	}
357	<	}
358	<
359	<
316	>	* isQueued(null) throws NullPointerException
317	>	*/
318	>	public void testIsQueuedNPE() {
319	>	final Mutex sync = new Mutex();
320	>	try {
321	>	sync.isQueued(null);
322	>	shouldThrow();
323	>	} catch (NullPointerException success) {}
324	>	}
325	>
326	>	/**
327	>	* isQueued reports whether a thread is queued
328	>	*/
329	>	public void testIsQueued() {
330	>	final Mutex sync = new Mutex();
331	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
332	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
333	>	assertFalse(sync.isQueued(t1));
334	>	assertFalse(sync.isQueued(t2));
335	>	sync.acquire();
336	>	t1.start();
337	>	waitForQueuedThread(sync, t1);
338	>	assertTrue(sync.isQueued(t1));
339	>	assertFalse(sync.isQueued(t2));
340	>	t2.start();
341	>	waitForQueuedThread(sync, t2);
342	>	assertTrue(sync.isQueued(t1));
343	>	assertTrue(sync.isQueued(t2));
344	>	t1.interrupt();
345	>	awaitTermination(t1);
346	>	assertFalse(sync.isQueued(t1));
347	>	assertTrue(sync.isQueued(t2));
348	>	sync.release();
349	>	awaitTermination(t2);
350	>	assertFalse(sync.isQueued(t1));
351	>	assertFalse(sync.isQueued(t2));
352	>	}
353	>
354	>	/**
355	>	* getFirstQueuedThread returns first waiting thread or null if none
356	>	*/
357	>	public void testGetFirstQueuedThread() {
358	>	final Mutex sync = new Mutex();
359	>	assertNull(sync.getFirstQueuedThread());
360	>	sync.acquire();
361	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
362	>	waitForQueuedThread(sync, t1);
363	>	assertEquals(t1, sync.getFirstQueuedThread());
364	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
365	>	waitForQueuedThread(sync, t2);
366	>	assertEquals(t1, sync.getFirstQueuedThread());
367	>	t1.interrupt();
368	>	awaitTermination(t1);
369	>	assertEquals(t2, sync.getFirstQueuedThread());
370	>	sync.release();
371	>	awaitTermination(t2);
372	>	assertNull(sync.getFirstQueuedThread());
373	>	}
374	>
375	>	/**
376	>	* hasContended reports false if no thread has ever blocked, else true
377	>	*/
378	>	public void testHasContended() {
379	>	final Mutex sync = new Mutex();
380	>	assertFalse(sync.hasContended());
381	>	sync.acquire();
382	>	assertFalse(sync.hasContended());
383	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
384	>	waitForQueuedThread(sync, t1);
385	>	assertTrue(sync.hasContended());
386	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
387	>	waitForQueuedThread(sync, t2);
388	>	assertTrue(sync.hasContended());
389	>	t1.interrupt();
390	>	awaitTermination(t1);
391	>	assertTrue(sync.hasContended());
392	>	sync.release();
393	>	awaitTermination(t2);
394	>	assertTrue(sync.hasContended());
395	>	}
396	>
397	>	/**
398	>	* getQueuedThreads returns all waiting threads
399	>	*/
400	>	public void testGetQueuedThreads() {
401	>	final Mutex sync = new Mutex();
402	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
403	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
404	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
405	>	sync.acquire();
406	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
407	>	t1.start();
408	>	waitForQueuedThread(sync, t1);
409	>	assertHasExclusiveQueuedThreads(sync, t1);
410	>	assertTrue(sync.getQueuedThreads().contains(t1));
411	>	assertFalse(sync.getQueuedThreads().contains(t2));
412	>	t2.start();
413	>	waitForQueuedThread(sync, t2);
414	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
415	>	assertTrue(sync.getQueuedThreads().contains(t1));
416	>	assertTrue(sync.getQueuedThreads().contains(t2));
417	>	t1.interrupt();
418	>	awaitTermination(t1);
419	>	assertHasExclusiveQueuedThreads(sync, t2);
420	>	sync.release();
421	>	awaitTermination(t2);
422	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
423	>	}
424	>
425	>	/**
426	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
427	>	*/
428	>	public void testGetExclusiveQueuedThreads() {
429	>	final Mutex sync = new Mutex();
430	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
431	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
432	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
433	>	sync.acquire();
434	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
435	>	t1.start();
436	>	waitForQueuedThread(sync, t1);
437	>	assertHasExclusiveQueuedThreads(sync, t1);
438	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
439	>	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
440	>	t2.start();
441	>	waitForQueuedThread(sync, t2);
442	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
443	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
444	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
445	>	t1.interrupt();
446	>	awaitTermination(t1);
447	>	assertHasExclusiveQueuedThreads(sync, t2);
448	>	sync.release();
449	>	awaitTermination(t2);
450	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
451	>	}
452	>
453	>	/**
454	>	* getSharedQueuedThreads does not include exclusively waiting threads
455	>	*/
456	>	public void testGetSharedQueuedThreads_Exclusive() {
457	>	final Mutex sync = new Mutex();
458	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
459	>	sync.acquire();
460	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
461	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
462	>	waitForQueuedThread(sync, t1);
463	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
464	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
465	>	waitForQueuedThread(sync, t2);
466	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
467	>	t1.interrupt();
468	>	awaitTermination(t1);
469	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
470	>	sync.release();
471	>	awaitTermination(t2);
472	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
473	>	}
474	>
475	>	/**
476	>	* getSharedQueuedThreads returns all shared waiting threads
477	>	*/
478	>	public void testGetSharedQueuedThreads_Shared() {
479	>	final BooleanLatch l = new BooleanLatch();
480	>	assertHasSharedQueuedThreads(l, NO_THREADS);
481	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
482	>	public void realRun() throws InterruptedException {
483	>	l.acquireSharedInterruptibly(0);
484	>	}});
485	>	waitForQueuedThread(l, t1);
486	>	assertHasSharedQueuedThreads(l, t1);
487	>	Thread t2 = newStartedThread(new CheckedRunnable() {
488	>	public void realRun() throws InterruptedException {
489	>	l.acquireSharedInterruptibly(0);
490	>	}});
491	>	waitForQueuedThread(l, t2);
492	>	assertHasSharedQueuedThreads(l, t1, t2);
493	>	t1.interrupt();
494	>	awaitTermination(t1);
495	>	assertHasSharedQueuedThreads(l, t2);
496	>	assertTrue(l.releaseShared(0));
497	>	awaitTermination(t2);
498	>	assertHasSharedQueuedThreads(l, NO_THREADS);
499	>	}
500	>
501	>	/**
502	>	* tryAcquireNanos is interruptible
503	>	*/
504	>	public void testTryAcquireNanos_Interruptible() {
505	>	final Mutex sync = new Mutex();
506	>	sync.acquire();
507	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
508	>	public void realRun() throws InterruptedException {
509	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
510	>	}});
511	>
512	>	waitForQueuedThread(sync, t);
513	>	t.interrupt();
514	>	awaitTermination(t);
515	>	}
516	>
517	>	/**
518	>	* tryAcquire on exclusively held sync fails
519	>	*/
520	>	public void testTryAcquireWhenSynced() {
521	>	final Mutex sync = new Mutex();
522	>	sync.acquire();
523	>	Thread t = newStartedThread(new CheckedRunnable() {
524	>	public void realRun() {
525	>	assertFalse(sync.tryAcquire());
526	>	}});
527	>
528	>	awaitTermination(t);
529	>	sync.release();
530	>	}
531	>
532	>	/**
533	>	* tryAcquireNanos on an exclusively held sync times out
534	>	*/
535	>	public void testAcquireNanos_Timeout() {
536	>	final Mutex sync = new Mutex();
537	>	sync.acquire();
538	>	Thread t = newStartedThread(new CheckedRunnable() {
539	>	public void realRun() throws InterruptedException {
540	>	long startTime = System.nanoTime();
541	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
542	>	assertFalse(sync.tryAcquireNanos(nanos));
543	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
544	>	}});
545	>
546	>	awaitTermination(t);
547	>	sync.release();
548	>	}
549	>
550		/**
551		* getState is true when acquired and false when not
552		*/
553		public void testGetState() {
554	<	final Mutex lock = new Mutex();
555	<	lock.acquireExclusiveUninterruptibly(1);
556	<	assertTrue(lock.isLocked());
557	<	lock.releaseExclusive(1);
558	<	assertFalse(lock.isLocked());
559	<	Thread t = new Thread(new Runnable() {
560	<	public void run() {
561	<	lock.acquireExclusiveUninterruptibly(1);
562	<	try {
563	<	Thread.sleep(SMALL_DELAY_MS);
564	<	}
565	<	catch(Exception e) {
566	<	threadUnexpectedException();
567	<	}
568	<	lock.releaseExclusive(1);
569	<	}
570	<	});
571	<	try {
572	<	t.start();
573	<	Thread.sleep(SHORT_DELAY_MS);
574	<	assertTrue(lock.isLocked());
349	<	t.join();
350	<	assertFalse(lock.isLocked());
351	<	} catch(Exception e){
352	<	unexpectedException();
353	<	}
554	>	final Mutex sync = new Mutex();
555	>	sync.acquire();
556	>	assertTrue(sync.isHeldExclusively());
557	>	sync.release();
558	>	assertFalse(sync.isHeldExclusively());
559	>
560	>	final BooleanLatch acquired = new BooleanLatch();
561	>	final BooleanLatch done = new BooleanLatch();
562	>	Thread t = newStartedThread(new CheckedRunnable() {
563	>	public void realRun() throws InterruptedException {
564	>	sync.acquire();
565	>	assertTrue(acquired.releaseShared(0));
566	>	done.acquireShared(0);
567	>	sync.release();
568	>	}});
569	>
570	>	acquired.acquireShared(0);
571	>	assertTrue(sync.isHeldExclusively());
572	>	assertTrue(done.releaseShared(0));
573	>	awaitTermination(t);
574	>	assertFalse(sync.isHeldExclusively());
575		}
576
577	+	/**
578	+	* acquireInterruptibly succeeds when released, else is interruptible
579	+	*/
580	+	public void testAcquireInterruptibly() throws InterruptedException {
581	+	final Mutex sync = new Mutex();
582	+	final BooleanLatch threadStarted = new BooleanLatch();
583	+	sync.acquireInterruptibly();
584	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
585	+	public void realRun() throws InterruptedException {
586	+	assertTrue(threadStarted.releaseShared(0));
587	+	sync.acquireInterruptibly();
588	+	}});
589	+
590	+	threadStarted.acquireShared(0);
591	+	waitForQueuedThread(sync, t);
592	+	t.interrupt();
593	+	awaitTermination(t);
594	+	assertTrue(sync.isHeldExclusively());
595	+	}
596
597		/**
598	<	* acquireExclusiveInterruptibly is interruptible.
599	<	*/
600	<	public void testAcquireInterruptibly1() {
601	<	final Mutex lock = new Mutex();
602	<	lock.acquireExclusiveUninterruptibly(1);
603	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
604	<	try {
605	<	t.start();
606	<	t.interrupt();
607	<	lock.releaseExclusive(1);
608	<	t.join();
609	<	} catch(Exception e){
610	<	unexpectedException();
611	<	}
612	<	}
613	<
614	<	/**
615	<	* acquireExclusiveInterruptibly succeeds when released, else is interruptible
616	<	*/
617	<	public void testAcquireInterruptibly2() {
618	<	final Mutex lock = new Mutex();
619	<	try {
620	<	lock.acquireExclusiveInterruptibly(1);
621	<	} catch(Exception e) {
382	<	unexpectedException();
383	<	}
384	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
385	<	try {
386	<	t.start();
387	<	t.interrupt();
388	<	assertTrue(lock.isLocked());
389	<	t.join();
390	<	} catch(Exception e){
391	<	unexpectedException();
598	>	* owns is true for a condition created by sync else false
599	>	*/
600	>	public void testOwns() {
601	>	final Mutex sync = new Mutex();
602	>	final ConditionObject c = sync.newCondition();
603	>	final Mutex sync2 = new Mutex();
604	>	assertTrue(sync.owns(c));
605	>	assertFalse(sync2.owns(c));
606	>	}
607	>
608	>	/**
609	>	* Calling await without holding sync throws IllegalMonitorStateException
610	>	*/
611	>	public void testAwait_IMSE() {
612	>	final Mutex sync = new Mutex();
613	>	final ConditionObject c = sync.newCondition();
614	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
615	>	long startTime = System.nanoTime();
616	>	try {
617	>	await(c, awaitMethod);
618	>	shouldThrow();
619	>	} catch (IllegalMonitorStateException success) {
620	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
621	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
622		}
623		}
624
625		/**
626	<	* owns is true for a condition created by lock else false
626	>	* Calling signal without holding sync throws IllegalMonitorStateException
627		*/
628	<	public void testOwns() {
629	<	final Mutex lock = new Mutex();
630	<	final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition();
631	<	final Mutex lock2 = new Mutex();
632	<	assertTrue(lock.owns(c));
633	<	assertFalse(lock2.owns(c));
628	>	public void testSignal_IMSE() {
629	>	final Mutex sync = new Mutex();
630	>	final ConditionObject c = sync.newCondition();
631	>	try {
632	>	c.signal();
633	>	shouldThrow();
634	>	} catch (IllegalMonitorStateException success) {}
635	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
636		}
637
638		/**
639	<	* Calling await without holding lock throws IllegalMonitorStateException
639	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
640		*/
641	<	public void testAwait_IllegalMonitor() {
642	<	final Mutex lock = new Mutex();
643	<	final Condition c = lock.newCondition();
641	>	public void testSignalAll_IMSE() {
642	>	final Mutex sync = new Mutex();
643	>	final ConditionObject c = sync.newCondition();
644		try {
645	<	c.await();
645	>	c.signalAll();
646		shouldThrow();
647	<	}
416	<	catch (IllegalMonitorStateException success) {
417	<	}
418	<	catch (Exception ex) {
419	<	unexpectedException();
420	<	}
647	>	} catch (IllegalMonitorStateException success) {}
648		}
649
650		/**
651	<	* Calling signal without holding lock throws IllegalMonitorStateException
651	>	* await/awaitNanos/awaitUntil without a signal times out
652		*/
653	<	public void testSignal_IllegalMonitor() {
654	<	final Mutex lock = new Mutex();
655	<	final Condition c = lock.newCondition();
653	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
654	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
655	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
656	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
657	>	final Mutex sync = new Mutex();
658	>	final ConditionObject c = sync.newCondition();
659	>	sync.acquire();
660	>	assertAwaitTimesOut(c, awaitMethod);
661	>	sync.release();
662	>	}
663	>
664	>	/**
665	>	* await/awaitNanos/awaitUntil returns when signalled
666	>	*/
667	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
668	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
669	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
670	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
671	>	public void testSignal(final AwaitMethod awaitMethod) {
672	>	final Mutex sync = new Mutex();
673	>	final ConditionObject c = sync.newCondition();
674	>	final BooleanLatch acquired = new BooleanLatch();
675	>	Thread t = newStartedThread(new CheckedRunnable() {
676	>	public void realRun() throws InterruptedException {
677	>	sync.acquire();
678	>	assertTrue(acquired.releaseShared(0));
679	>	await(c, awaitMethod);
680	>	sync.release();
681	>	}});
682	>
683	>	acquired.acquireShared(0);
684	>	sync.acquire();
685	>	assertHasWaitersLocked(sync, c, t);
686	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
687	>	c.signal();
688	>	assertHasWaitersLocked(sync, c, NO_THREADS);
689	>	assertHasExclusiveQueuedThreads(sync, t);
690	>	sync.release();
691	>	awaitTermination(t);
692	>	}
693	>
694	>	/**
695	>	* hasWaiters(null) throws NullPointerException
696	>	*/
697	>	public void testHasWaitersNPE() {
698	>	final Mutex sync = new Mutex();
699		try {
700	<	c.signal();
700	>	sync.hasWaiters(null);
701		shouldThrow();
702	<	}
433	<	catch (IllegalMonitorStateException success) {
434	<	}
435	<	catch (Exception ex) {
436	<	unexpectedException();
437	<	}
702	>	} catch (NullPointerException success) {}
703		}
704
705		/**
706	<	* awaitNanos without a signal times out
706	>	* getWaitQueueLength(null) throws NullPointerException
707		*/
708	<	public void testAwaitNanos_Timeout() {
709	<	final Mutex lock = new Mutex();
445	<	final Condition c = lock.newCondition();
708	>	public void testGetWaitQueueLengthNPE() {
709	>	final Mutex sync = new Mutex();
710		try {
711	<	lock.acquireExclusiveUninterruptibly(1);
712	<	long t = c.awaitNanos(100);
713	<	assertTrue(t <= 0);
450	<	lock.releaseExclusive(1);
451	<	}
452	<	catch (Exception ex) {
453	<	unexpectedException();
454	<	}
711	>	sync.getWaitQueueLength(null);
712	>	shouldThrow();
713	>	} catch (NullPointerException success) {}
714		}
715
716		/**
717	<	*  timed await without a signal times out
717	>	* getWaitingThreads(null) throws NullPointerException
718		*/
719	<	public void testAwait_Timeout() {
720	<	final Mutex lock = new Mutex();
462	<	final Condition c = lock.newCondition();
719	>	public void testGetWaitingThreadsNPE() {
720	>	final Mutex sync = new Mutex();
721		try {
722	<	lock.acquireExclusiveUninterruptibly(1);
723	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
724	<	lock.releaseExclusive(1);
467	<	}
468	<	catch (Exception ex) {
469	<	unexpectedException();
470	<	}
722	>	sync.getWaitingThreads(null);
723	>	shouldThrow();
724	>	} catch (NullPointerException success) {}
725		}
726
727		/**
728	<	* awaitUntil without a signal times out
728	>	* hasWaiters throws IllegalArgumentException if not owned
729		*/
730	<	public void testAwaitUntil_Timeout() {
731	<	final Mutex lock = new Mutex();
732	<	final Condition c = lock.newCondition();
730	>	public void testHasWaitersIAE() {
731	>	final Mutex sync = new Mutex();
732	>	final ConditionObject c = sync.newCondition();
733	>	final Mutex sync2 = new Mutex();
734		try {
735	<	lock.acquireExclusiveUninterruptibly(1);
736	<	java.util.Date d = new java.util.Date();
737	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
738	<	lock.releaseExclusive(1);
484	<	}
485	<	catch (Exception ex) {
486	<	unexpectedException();
487	<	}
735	>	sync2.hasWaiters(c);
736	>	shouldThrow();
737	>	} catch (IllegalArgumentException success) {}
738	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
739		}
740
741		/**
742	<	* await returns when signalled
742	>	* hasWaiters throws IllegalMonitorStateException if not synced
743		*/
744	<	public void testAwait() {
745	<	final Mutex lock = new Mutex();
746	<	final Condition c = lock.newCondition();
747	<	Thread t = new Thread(new Runnable() {
748	<	public void run() {
749	<	try {
750	<	lock.acquireExclusiveUninterruptibly(1);
751	<	c.await();
752	<	lock.releaseExclusive(1);
502	<	}
503	<	catch(InterruptedException e) {
504	<	threadUnexpectedException();
505	<	}
506	<	}
507	<	});
744	>	public void testHasWaitersIMSE() {
745	>	final Mutex sync = new Mutex();
746	>	final ConditionObject c = sync.newCondition();
747	>	try {
748	>	sync.hasWaiters(c);
749	>	shouldThrow();
750	>	} catch (IllegalMonitorStateException success) {}
751	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
752	>	}
753
754	+	/**
755	+	* getWaitQueueLength throws IllegalArgumentException if not owned
756	+	*/
757	+	public void testGetWaitQueueLengthIAE() {
758	+	final Mutex sync = new Mutex();
759	+	final ConditionObject c = sync.newCondition();
760	+	final Mutex sync2 = new Mutex();
761		try {
762	<	t.start();
763	<	Thread.sleep(SHORT_DELAY_MS);
764	<	lock.acquireExclusiveUninterruptibly(1);
765	<	c.signal();
514	<	lock.releaseExclusive(1);
515	<	t.join(SHORT_DELAY_MS);
516	<	assertFalse(t.isAlive());
517	<	}
518	<	catch (Exception ex) {
519	<	unexpectedException();
520	<	}
762	>	sync2.getWaitQueueLength(c);
763	>	shouldThrow();
764	>	} catch (IllegalArgumentException success) {}
765	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
766		}
767
768		/**
769	<	* toString indicates current state
769	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
770		*/
771	<	public void testToString() {
772	<	Mutex lock = new Mutex();
773	<	String us = lock.toString();
774	<	assertTrue(us.indexOf("State = 0") >= 0);
775	<	lock.acquireExclusiveUninterruptibly(1);
776	<	String ls = lock.toString();
777	<	assertTrue(ls.indexOf("State = 1") >= 0);
771	>	public void testGetWaitQueueLengthIMSE() {
772	>	final Mutex sync = new Mutex();
773	>	final ConditionObject c = sync.newCondition();
774	>	try {
775	>	sync.getWaitQueueLength(c);
776	>	shouldThrow();
777	>	} catch (IllegalMonitorStateException success) {}
778	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
779		}
780
781		/**
782	<	* A serialized AQS deserializes with current state
782	>	* getWaitingThreads throws IllegalArgumentException if not owned
783		*/
784	<	public void testSerialization() {
785	<	Mutex l = new Mutex();
786	<	l.acquireExclusiveUninterruptibly(1);
787	<	assertTrue(l.isLocked());
784	>	public void testGetWaitingThreadsIAE() {
785	>	final Mutex sync = new Mutex();
786	>	final ConditionObject c = sync.newCondition();
787	>	final Mutex sync2 = new Mutex();
788	>	try {
789	>	sync2.getWaitingThreads(c);
790	>	shouldThrow();
791	>	} catch (IllegalArgumentException success) {}
792	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
793	>	}
794
795	+	/**
796	+	* getWaitingThreads throws IllegalMonitorStateException if not synced
797	+	*/
798	+	public void testGetWaitingThreadsIMSE() {
799	+	final Mutex sync = new Mutex();
800	+	final ConditionObject c = sync.newCondition();
801		try {
802	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
803	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
804	<	out.writeObject(l);
805	<	out.close();
802	>	sync.getWaitingThreads(c);
803	>	shouldThrow();
804	>	} catch (IllegalMonitorStateException success) {}
805	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
806	>	}
807
808	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
809	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
810	<	Mutex r = (Mutex) in.readObject();
811	<	assertTrue(r.isLocked());
812	<	} catch(Exception e){
813	<	e.printStackTrace();
814	<	unexpectedException();
815	<	}
808	>	/**
809	>	* hasWaiters returns true when a thread is waiting, else false
810	>	*/
811	>	public void testHasWaiters() {
812	>	final Mutex sync = new Mutex();
813	>	final ConditionObject c = sync.newCondition();
814	>	final BooleanLatch acquired = new BooleanLatch();
815	>	Thread t = newStartedThread(new CheckedRunnable() {
816	>	public void realRun() throws InterruptedException {
817	>	sync.acquire();
818	>	assertHasWaitersLocked(sync, c, NO_THREADS);
819	>	assertFalse(sync.hasWaiters(c));
820	>	assertTrue(acquired.releaseShared(0));
821	>	c.await();
822	>	sync.release();
823	>	}});
824	>
825	>	acquired.acquireShared(0);
826	>	sync.acquire();
827	>	assertHasWaitersLocked(sync, c, t);
828	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
829	>	assertTrue(sync.hasWaiters(c));
830	>	c.signal();
831	>	assertHasWaitersLocked(sync, c, NO_THREADS);
832	>	assertHasExclusiveQueuedThreads(sync, t);
833	>	assertFalse(sync.hasWaiters(c));
834	>	sync.release();
835	>
836	>	awaitTermination(t);
837	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
838	>	}
839	>
840	>	/**
841	>	* getWaitQueueLength returns number of waiting threads
842	>	*/
843	>	public void testGetWaitQueueLength() {
844	>	final Mutex sync = new Mutex();
845	>	final ConditionObject c = sync.newCondition();
846	>	final BooleanLatch acquired1 = new BooleanLatch();
847	>	final BooleanLatch acquired2 = new BooleanLatch();
848	>	final Thread t1 = newStartedThread(new CheckedRunnable() {
849	>	public void realRun() throws InterruptedException {
850	>	sync.acquire();
851	>	assertHasWaitersLocked(sync, c, NO_THREADS);
852	>	assertEquals(0, sync.getWaitQueueLength(c));
853	>	assertTrue(acquired1.releaseShared(0));
854	>	c.await();
855	>	sync.release();
856	>	}});
857	>	acquired1.acquireShared(0);
858	>	sync.acquire();
859	>	assertHasWaitersLocked(sync, c, t1);
860	>	assertEquals(1, sync.getWaitQueueLength(c));
861	>	sync.release();
862	>
863	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
864	>	public void realRun() throws InterruptedException {
865	>	sync.acquire();
866	>	assertHasWaitersLocked(sync, c, t1);
867	>	assertEquals(1, sync.getWaitQueueLength(c));
868	>	assertTrue(acquired2.releaseShared(0));
869	>	c.await();
870	>	sync.release();
871	>	}});
872	>	acquired2.acquireShared(0);
873	>	sync.acquire();
874	>	assertHasWaitersLocked(sync, c, t1, t2);
875	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
876	>	assertEquals(2, sync.getWaitQueueLength(c));
877	>	c.signalAll();
878	>	assertHasWaitersLocked(sync, c, NO_THREADS);
879	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
880	>	assertEquals(0, sync.getWaitQueueLength(c));
881	>	sync.release();
882	>
883	>	awaitTermination(t1);
884	>	awaitTermination(t2);
885	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
886	>	}
887	>
888	>	/**
889	>	* getWaitingThreads returns only and all waiting threads
890	>	*/
891	>	public void testGetWaitingThreads() {
892	>	final Mutex sync = new Mutex();
893	>	final ConditionObject c = sync.newCondition();
894	>	final BooleanLatch acquired1 = new BooleanLatch();
895	>	final BooleanLatch acquired2 = new BooleanLatch();
896	>	final Thread t1 = new Thread(new CheckedRunnable() {
897	>	public void realRun() throws InterruptedException {
898	>	sync.acquire();
899	>	assertHasWaitersLocked(sync, c, NO_THREADS);
900	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
901	>	assertTrue(acquired1.releaseShared(0));
902	>	c.await();
903	>	sync.release();
904	>	}});
905	>
906	>	final Thread t2 = new Thread(new CheckedRunnable() {
907	>	public void realRun() throws InterruptedException {
908	>	sync.acquire();
909	>	assertHasWaitersLocked(sync, c, t1);
910	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
911	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
912	>	assertEquals(1, sync.getWaitingThreads(c).size());
913	>	assertTrue(acquired2.releaseShared(0));
914	>	c.await();
915	>	sync.release();
916	>	}});
917	>
918	>	sync.acquire();
919	>	assertHasWaitersLocked(sync, c, NO_THREADS);
920	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
921	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
922	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
923	>	assertEquals(0, sync.getWaitingThreads(c).size());
924	>	sync.release();
925	>
926	>	t1.start();
927	>	acquired1.acquireShared(0);
928	>	sync.acquire();
929	>	assertHasWaitersLocked(sync, c, t1);
930	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
931	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
932	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
933	>	assertEquals(1, sync.getWaitingThreads(c).size());
934	>	sync.release();
935	>
936	>	t2.start();
937	>	acquired2.acquireShared(0);
938	>	sync.acquire();
939	>	assertHasWaitersLocked(sync, c, t1, t2);
940	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
941	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
942	>	assertTrue(sync.getWaitingThreads(c).contains(t2));
943	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
944	>	assertEquals(2, sync.getWaitingThreads(c).size());
945	>	c.signalAll();
946	>	assertHasWaitersLocked(sync, c, NO_THREADS);
947	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
948	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
949	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
950	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
951	>	assertEquals(0, sync.getWaitingThreads(c).size());
952	>	sync.release();
953	>
954	>	awaitTermination(t1);
955	>	awaitTermination(t2);
956	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
957	>	}
958	>
959	>	/**
960	>	* awaitUninterruptibly is uninterruptible
961	>	*/
962	>	public void testAwaitUninterruptibly() {
963	>	final Mutex sync = new Mutex();
964	>	final ConditionObject c = sync.newCondition();
965	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
966	>	Thread t = newStartedThread(new CheckedRunnable() {
967	>	public void realRun() {
968	>	sync.acquire();
969	>	assertTrue(pleaseInterrupt.releaseShared(0));
970	>	c.awaitUninterruptibly();
971	>	assertTrue(Thread.interrupted());
972	>	assertHasWaitersLocked(sync, c, NO_THREADS);
973	>	sync.release();
974	>	}});
975	>
976	>	pleaseInterrupt.acquireShared(0);
977	>	sync.acquire();
978	>	assertHasWaitersLocked(sync, c, t);
979	>	sync.release();
980	>	t.interrupt();
981	>	assertHasWaitersUnlocked(sync, c, t);
982	>	assertThreadStaysAlive(t);
983	>	sync.acquire();
984	>	assertHasWaitersLocked(sync, c, t);
985	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
986	>	c.signal();
987	>	assertHasWaitersLocked(sync, c, NO_THREADS);
988	>	assertHasExclusiveQueuedThreads(sync, t);
989	>	sync.release();
990	>	awaitTermination(t);
991	>	}
992	>
993	>	/**
994	>	* await/awaitNanos/awaitUntil is interruptible
995	>	*/
996	>	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
997	>	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
998	>	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
999	>	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
1000	>	public void testInterruptible(final AwaitMethod awaitMethod) {
1001	>	final Mutex sync = new Mutex();
1002	>	final ConditionObject c = sync.newCondition();
1003	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
1004	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1005	>	public void realRun() throws InterruptedException {
1006	>	sync.acquire();
1007	>	assertTrue(pleaseInterrupt.releaseShared(0));
1008	>	await(c, awaitMethod);
1009	>	}});
1010	>
1011	>	pleaseInterrupt.acquireShared(0);
1012	>	t.interrupt();
1013	>	awaitTermination(t);
1014	>	}
1015	>
1016	>	/**
1017	>	* signalAll wakes up all threads
1018	>	*/
1019	>	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1020	>	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1021	>	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1022	>	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1023	>	public void testSignalAll(final AwaitMethod awaitMethod) {
1024	>	final Mutex sync = new Mutex();
1025	>	final ConditionObject c = sync.newCondition();
1026	>	final BooleanLatch acquired1 = new BooleanLatch();
1027	>	final BooleanLatch acquired2 = new BooleanLatch();
1028	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1029	>	public void realRun() throws InterruptedException {
1030	>	sync.acquire();
1031	>	acquired1.releaseShared(0);
1032	>	await(c, awaitMethod);
1033	>	sync.release();
1034	>	}});
1035	>
1036	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1037	>	public void realRun() throws InterruptedException {
1038	>	sync.acquire();
1039	>	acquired2.releaseShared(0);
1040	>	await(c, awaitMethod);
1041	>	sync.release();
1042	>	}});
1043	>
1044	>	acquired1.acquireShared(0);
1045	>	acquired2.acquireShared(0);
1046	>	sync.acquire();
1047	>	assertHasWaitersLocked(sync, c, t1, t2);
1048	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1049	>	c.signalAll();
1050	>	assertHasWaitersLocked(sync, c, NO_THREADS);
1051	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
1052	>	sync.release();
1053	>	awaitTermination(t1);
1054	>	awaitTermination(t2);
1055		}
1056
1057	+	/**
1058	+	* toString indicates current state
1059	+	*/
1060	+	public void testToString() {
1061	+	Mutex sync = new Mutex();
1062	+	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1063	+	sync.acquire();
1064	+	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1065	+	}
1066
1067		/**
1068	<	* Latch isSignalled initially returns false, then true after release
1068	>	* A serialized AQS deserializes with current state, but no queued threads
1069		*/
1070	<	public void testLatchIsSignalled() {
1071	<	final BooleanLatch l = new BooleanLatch();
1072	<	assertFalse(l.isSignalled());
1073	<	l.releaseShared(0);
1074	<	assertTrue(l.isSignalled());
1070	>	public void testSerialization() {
1071	>	Mutex sync = new Mutex();
1072	>	assertFalse(serialClone(sync).isHeldExclusively());
1073	>	sync.acquire();
1074	>	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1075	>	waitForQueuedThread(sync, t);
1076	>	assertTrue(sync.isHeldExclusively());
1077	>
1078	>	Mutex clone = serialClone(sync);
1079	>	assertTrue(clone.isHeldExclusively());
1080	>	assertHasExclusiveQueuedThreads(sync, t);
1081	>	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1082	>	t.interrupt();
1083	>	awaitTermination(t);
1084	>	sync.release();
1085	>	assertFalse(sync.isHeldExclusively());
1086	>	assertTrue(clone.isHeldExclusively());
1087	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1088	>	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1089		}
1090
1091		/**
1092	<	* release and has no effect when already signalled
1092	>	* tryReleaseShared setting state changes getState
1093	>	*/
1094	>	public void testGetStateWithReleaseShared() {
1095	>	final BooleanLatch l = new BooleanLatch();
1096	>	assertFalse(l.isSignalled());
1097	>	assertTrue(l.releaseShared(0));
1098	>	assertTrue(l.isSignalled());
1099	>	}
1100	>
1101	>	/**
1102	>	* releaseShared has no effect when already signalled
1103		*/
1104		public void testReleaseShared() {
1105	<	final BooleanLatch l = new BooleanLatch();
1106	<	assertFalse(l.isSignalled());
1107	<	l.releaseShared(0);
1108	<	assertTrue(l.isSignalled());
1109	<	l.releaseShared(0);
1110	<	assertTrue(l.isSignalled());
1105	>	final BooleanLatch l = new BooleanLatch();
1106	>	assertFalse(l.isSignalled());
1107	>	assertTrue(l.releaseShared(0));
1108	>	assertTrue(l.isSignalled());
1109	>	assertTrue(l.releaseShared(0));
1110	>	assertTrue(l.isSignalled());
1111		}
1112
1113		/**
1114		* acquireSharedInterruptibly returns after release, but not before
1115		*/
1116		public void testAcquireSharedInterruptibly() {
1117	<	final BooleanLatch l = new BooleanLatch();
1117	>	final BooleanLatch l = new BooleanLatch();
1118
1119	<	Thread t = new Thread(new Runnable() {
1120	<	public void run() {
1121	<	try {
1122	<	threadAssertFalse(l.isSignalled());
1123	<	l.acquireSharedInterruptibly(0);
1124	<	threadAssertTrue(l.isSignalled());
1125	<	} catch(InterruptedException e){
1126	<	threadUnexpectedException();
1127	<	}
1128	<	}
1129	<	});
1130	<	try {
1131	<	t.start();
1132	<	assertFalse(l.isSignalled());
1133	<	Thread.sleep(SHORT_DELAY_MS);
1134	<	l.releaseShared(0);
604	<	assertTrue(l.isSignalled());
605	<	t.join();
606	<	} catch (InterruptedException e){
607	<	unexpectedException();
608	<	}
609	<	}
610	<
611	<
612	<	/**
613	<	* acquireSharedTimed returns after release
614	<	*/
615	<	public void testAsquireSharedTimed() {
616	<	final BooleanLatch l = new BooleanLatch();
617	<
618	<	Thread t = new Thread(new Runnable() {
619	<	public void run() {
620	<	try {
621	<	threadAssertFalse(l.isSignalled());
622	<	threadAssertTrue(l.acquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
623	<	threadAssertTrue(l.isSignalled());
624	<
625	<	} catch(InterruptedException e){
626	<	threadUnexpectedException();
627	<	}
628	<	}
629	<	});
630	<	try {
631	<	t.start();
632	<	assertFalse(l.isSignalled());
633	<	Thread.sleep(SHORT_DELAY_MS);
634	<	l.releaseShared(0);
635	<	assertTrue(l.isSignalled());
636	<	t.join();
637	<	} catch (InterruptedException e){
638	<	unexpectedException();
639	<	}
1119	>	Thread t = newStartedThread(new CheckedRunnable() {
1120	>	public void realRun() throws InterruptedException {
1121	>	assertFalse(l.isSignalled());
1122	>	l.acquireSharedInterruptibly(0);
1123	>	assertTrue(l.isSignalled());
1124	>	l.acquireSharedInterruptibly(0);
1125	>	assertTrue(l.isSignalled());
1126	>	}});
1127	>
1128	>	waitForQueuedThread(l, t);
1129	>	assertFalse(l.isSignalled());
1130	>	assertThreadStaysAlive(t);
1131	>	assertHasSharedQueuedThreads(l, t);
1132	>	assertTrue(l.releaseShared(0));
1133	>	assertTrue(l.isSignalled());
1134	>	awaitTermination(t);
1135		}
1136	<
1136	>
1137		/**
1138	<	* acquireSharedInterruptibly throws IE if interrupted before released
1138	>	* tryAcquireSharedNanos returns after release, but not before
1139		*/
1140	<	public void testAcquireSharedInterruptibly_InterruptedException() {
1140	>	public void testTryAcquireSharedNanos() {
1141		final BooleanLatch l = new BooleanLatch();
1142	<	Thread t = new Thread(new Runnable() {
1143	<	public void run() {
1144	<	try {
1145	<	threadAssertFalse(l.isSignalled());
1146	<	l.acquireSharedInterruptibly(0);
1147	<	threadShouldThrow();
1148	<	} catch(InterruptedException success){}
1149	<	}
1150	<	});
1151	<	t.start();
1152	<	try {
1153	<	assertFalse(l.isSignalled());
1154	<	t.interrupt();
1155	<	t.join();
1156	<	} catch (InterruptedException e){
1157	<	unexpectedException();
1158	<	}
1142	>
1143	>	Thread t = newStartedThread(new CheckedRunnable() {
1144	>	public void realRun() throws InterruptedException {
1145	>	assertFalse(l.isSignalled());
1146	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1147	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1148	>	assertTrue(l.isSignalled());
1149	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1150	>	assertTrue(l.isSignalled());
1151	>	}});
1152	>
1153	>	waitForQueuedThread(l, t);
1154	>	assertFalse(l.isSignalled());
1155	>	assertThreadStaysAlive(t);
1156	>	assertTrue(l.releaseShared(0));
1157	>	assertTrue(l.isSignalled());
1158	>	awaitTermination(t);
1159		}
1160
1161		/**
1162	<	* acquireSharedTimed throws IE if interrupted before released
1162	>	* acquireSharedInterruptibly is interruptible
1163		*/
1164	<	public void testAcquireSharedNanos_InterruptedException() {
1164	>	public void testAcquireSharedInterruptibly_Interruptible() {
1165		final BooleanLatch l = new BooleanLatch();
1166	<	Thread t = new Thread(new Runnable() {
1167	<	public void run() {
1168	<	try {
1169	<	threadAssertFalse(l.isSignalled());
1170	<	l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
1171	<	threadShouldThrow();
1172	<	} catch(InterruptedException success){}
1173	<	}
1174	<	});
1175	<	t.start();
1176	<	try {
1177	<	Thread.sleep(SHORT_DELAY_MS);
1178	<	assertFalse(l.isSignalled());
1179	<	t.interrupt();
1180	<	t.join();
1181	<	} catch (InterruptedException e){
1182	<	unexpectedException();
1183	<	}
1166	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1167	>	public void realRun() throws InterruptedException {
1168	>	assertFalse(l.isSignalled());
1169	>	l.acquireSharedInterruptibly(0);
1170	>	}});
1171	>
1172	>	waitForQueuedThread(l, t);
1173	>	assertFalse(l.isSignalled());
1174	>	t.interrupt();
1175	>	awaitTermination(t);
1176	>	assertFalse(l.isSignalled());
1177	>	}
1178	>
1179	>	/**
1180	>	* tryAcquireSharedNanos is interruptible
1181	>	*/
1182	>	public void testTryAcquireSharedNanos_Interruptible() {
1183	>	final BooleanLatch l = new BooleanLatch();
1184	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1185	>	public void realRun() throws InterruptedException {
1186	>	assertFalse(l.isSignalled());
1187	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1188	>	l.tryAcquireSharedNanos(0, nanos);
1189	>	}});
1190	>
1191	>	waitForQueuedThread(l, t);
1192	>	assertFalse(l.isSignalled());
1193	>	t.interrupt();
1194	>	awaitTermination(t);
1195	>	assertFalse(l.isSignalled());
1196		}
1197
1198		/**
1199	<	* acquireSharedTimed times out if not released before timeout
1199	>	* tryAcquireSharedNanos times out if not released before timeout
1200		*/
1201	<	public void testAcquireSharedNanos_Timeout() {
1201	>	public void testTryAcquireSharedNanos_Timeout() {
1202		final BooleanLatch l = new BooleanLatch();
1203	<	Thread t = new Thread(new Runnable() {
1204	<	public void run() {
1205	<	try {
1206	<	threadAssertFalse(l.isSignalled());
1207	<	threadAssertFalse(l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1208	<	} catch(InterruptedException ie){
1209	<	threadUnexpectedException();
1210	<	}
1203	>	final BooleanLatch observedQueued = new BooleanLatch();
1204	>	Thread t = newStartedThread(new CheckedRunnable() {
1205	>	public void realRun() throws InterruptedException {
1206	>	assertFalse(l.isSignalled());
1207	>	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	<	});
1216	<	t.start();
1217	<	try {
1218	<	Thread.sleep(SHORT_DELAY_MS);
1219	<	assertFalse(l.isSignalled());
1220	<	t.join();
1221	<	} catch (InterruptedException e){
1222	<	unexpectedException();
1223	<	}
1215	>	assertFalse(l.isSignalled());
1216	>	}});
1217	>
1218	>	waitForQueuedThread(l, t);
1219	>	observedQueued.releaseShared(0);
1220	>	assertFalse(l.isSignalled());
1221	>	awaitTermination(t);
1222	>	assertFalse(l.isSignalled());
1223	>	}
1224	>
1225	>	/**
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
716	–
1249		}

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