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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.13 by dl, Fri Jan 9 15:39:10 2004 UTC vs.
Revision 1.59 by jsr166, Mon Nov 27 03:25:42 2017 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.ArrayList;
13	>	import java.util.Arrays;
14	>	import java.util.Collection;
15	>	import java.util.HashSet;
16	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer;
17	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject;
18	>
19	>	import junit.framework.AssertionFailedError;
20	>	import junit.framework.Test;
21	>	import junit.framework.TestSuite;
22
23	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
24		public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	main(suite(), args);
27		}
28		public static Test suite() {
29		return new TestSuite(AbstractQueuedSynchronizerTest.class);
30		}
31
32		/**
33	<	* A simple mutex class, adapted from the
34	<	* AbstractQueuedSynchronizer javadoc.  Exclusive acquire tests
35	<	* exercise this as a sample user extension.  Other
36	<	* methods/features of AbstractQueuedSynchronizerTest are tested
37	<	* via other test classes, including those for ReentrantLock,
38	<	* ReentrantReadWriteLock, and Semaphore
33	>	* A simple mutex class, adapted from the class javadoc.  Exclusive
34	>	* acquire tests exercise this as a sample user extension.  Other
35	>	* methods/features of AbstractQueuedSynchronizer are tested via
36	>	* other test classes, including those for ReentrantLock,
37	>	* ReentrantReadWriteLock, and Semaphore.
38	>	*
39	>	* Unlike the javadoc sample, we don't track owner thread via
40	>	* AbstractOwnableSynchronizer methods.
41		*/
42		static class Mutex extends AbstractQueuedSynchronizer {
43	<	public boolean isLocked() { return getState() == 1; }
44	<
45	<	public boolean tryAcquireExclusive(int acquires) {
46	<	assertTrue(acquires == 1);
47	<	return compareAndSetState(0, 1);
48	<	}
49	<
50	<	public boolean tryReleaseExclusive(int releases) {
51	<	setState(0);
43	>	/** An eccentric value for locked synchronizer state. */
44	>	static final int LOCKED = (1 << 31) | (1 << 15);
45	>
46	>	static final int UNLOCKED = 0;
47	>
48	>	/** Owner thread is untracked, so this is really just isLocked(). */
49	>	@Override public boolean isHeldExclusively() {
50	>	int state = getState();
51	>	assertTrue(state == UNLOCKED || state == LOCKED);
52	>	return state == LOCKED;
53	>	}
54	>
55	>	@Override protected boolean tryAcquire(int acquires) {
56	>	assertEquals(LOCKED, acquires);
57	>	return compareAndSetState(UNLOCKED, LOCKED);
58	>	}
59	>
60	>	@Override protected boolean tryRelease(int releases) {
61	>	if (getState() != LOCKED) throw new IllegalMonitorStateException();
62	>	assertEquals(LOCKED, releases);
63	>	setState(UNLOCKED);
64		return true;
65		}
66	<
67	<	public void checkConditionAccess(Thread thread) {
68	<	if (getState() == 0) throw new IllegalMonitorStateException();
66	>
67	>	public boolean tryAcquireNanos(long nanos) throws InterruptedException {
68	>	return tryAcquireNanos(LOCKED, nanos);
69	>	}
70	>
71	>	public boolean tryAcquire() {
72	>	return tryAcquire(LOCKED);
73	>	}
74	>
75	>	public boolean tryRelease() {
76	>	return tryRelease(LOCKED);
77	>	}
78	>
79	>	public void acquire() {
80	>	acquire(LOCKED);
81	>	}
82	>
83	>	public void acquireInterruptibly() throws InterruptedException {
84	>	acquireInterruptibly(LOCKED);
85		}
86	<
87	<	public ConditionObject newCondition() { return new ConditionObject(); }
88	<
51	<	public void lock() {
52	<	acquireExclusiveUninterruptibly(1);
86	>
87	>	public void release() {
88	>	release(LOCKED);
89		}
90
91	+	/** Faux-Implements Lock.newCondition(). */
92	+	public ConditionObject newCondition() {
93	+	return new ConditionObject();
94	+	}
95		}
96
57	–
97		/**
98	<	* A simple latch class, to test shared mode.
98	>	* A minimal latch class, to test shared mode.
99		*/
100	<	static class BooleanLatch extends AbstractQueuedSynchronizer {
100	>	static class BooleanLatch extends AbstractQueuedSynchronizer {
101		public boolean isSignalled() { return getState() != 0; }
102
103		public int tryAcquireShared(int ignore) {
104	<	return isSignalled()? 1 : -1;
104	>	return isSignalled() ? 1 : -1;
105		}
106	<
106	>
107		public boolean tryReleaseShared(int ignore) {
108		setState(1);
109		return true;
#	Line 72 | Line 111 | public class AbstractQueuedSynchronizerT
111		}
112
113		/**
114	<	* A runnable calling acquireExclusiveInterruptibly
114	>	* A runnable calling acquireInterruptibly that does not expect to
115	>	* be interrupted.
116		*/
117	<	class InterruptibleLockRunnable implements Runnable {
118	<	final Mutex lock;
119	<	InterruptibleLockRunnable(Mutex l) { lock = l; }
120	<	public void run() {
121	<	try {
122	<	lock.acquireExclusiveInterruptibly(1);
123	<	} catch(InterruptedException success){}
117	>	class InterruptibleSyncRunnable extends CheckedRunnable {
118	>	final Mutex sync;
119	>	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
120	>	public void realRun() throws InterruptedException {
121	>	sync.acquireInterruptibly();
122	>	}
123	>	}
124	>
125	>	/**
126	>	* A runnable calling acquireInterruptibly that expects to be
127	>	* interrupted.
128	>	*/
129	>	class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
130	>	final Mutex sync;
131	>	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
132	>	public void realRun() throws InterruptedException {
133	>	sync.acquireInterruptibly();
134		}
135		}
136
137	+	/** A constant to clarify calls to checking methods below. */
138	+	static final Thread[] NO_THREADS = new Thread[0];
139
140		/**
141	<	* A runnable calling acquireExclusiveInterruptibly that expects to be
90	<	* interrupted
141	>	* Spin-waits until sync.isQueued(t) becomes true.
142		*/
143	<	class InterruptedLockRunnable implements Runnable {
144	<	final Mutex lock;
145	<	InterruptedLockRunnable(Mutex l) { lock = l; }
146	<	public void run() {
147	<	try {
148	<	lock.acquireExclusiveInterruptibly(1);
98	<	threadShouldThrow();
99	<	} catch(InterruptedException success){}
143	>	void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) {
144	>	long startTime = System.nanoTime();
145	>	while (!sync.isQueued(t)) {
146	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
147	>	throw new AssertionFailedError("timed out");
148	>	Thread.yield();
149		}
150	+	assertTrue(t.isAlive());
151		}
152	<
152	>
153		/**
154	<	* acquireExclusiveUninterruptiblying an releaseExclusiveed lock succeeds
154	>	* Checks that sync has exactly the given queued threads.
155		*/
156	<	public void testAcquireExclusiveUninterruptibly() {
157	<	Mutex rl = new Mutex();
158	<	rl.acquireExclusiveUninterruptibly(1);
159	<	assertTrue(rl.isLocked());
160	<	rl.releaseExclusive(1);
156	>	void assertHasQueuedThreads(AbstractQueuedSynchronizer sync,
157	>	Thread... expected) {
158	>	Collection<Thread> actual = sync.getQueuedThreads();
159	>	assertEquals(expected.length > 0, sync.hasQueuedThreads());
160	>	assertEquals(expected.length, sync.getQueueLength());
161	>	assertEquals(expected.length, actual.size());
162	>	assertEquals(expected.length == 0, actual.isEmpty());
163	>	assertEquals(new HashSet<Thread>(actual),
164	>	new HashSet<Thread>(Arrays.asList(expected)));
165		}
166
167		/**
168	<	* tryAcquireExclusive on an releaseExclusiveed lock succeeds
168	>	* Checks that sync has exactly the given (exclusive) queued threads.
169		*/
170	<	public void testTryAcquireExclusive() {
171	<	Mutex rl = new Mutex();
172	<	assertTrue(rl.tryAcquireExclusive(1));
173	<	assertTrue(rl.isLocked());
174	<	rl.releaseExclusive(1);
170	>	void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync,
171	>	Thread... expected) {
172	>	assertHasQueuedThreads(sync, expected);
173	>	assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()),
174	>	new HashSet<Thread>(sync.getQueuedThreads()));
175	>	assertEquals(0, sync.getSharedQueuedThreads().size());
176	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
177		}
178
179		/**
180	<	* hasQueuedThreads reports whether there are waiting threads
180	>	* Checks that sync has exactly the given (shared) queued threads.
181		*/
182	<	public void testhasQueuedThreads() {
183	<	final Mutex lock = new Mutex();
184	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
185	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
186	<	try {
187	<	assertFalse(lock.hasQueuedThreads());
188	<	lock.acquireExclusiveUninterruptibly(1);
189	<	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	<	}
182	>	void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync,
183	>	Thread... expected) {
184	>	assertHasQueuedThreads(sync, expected);
185	>	assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()),
186	>	new HashSet<Thread>(sync.getQueuedThreads()));
187	>	assertEquals(0, sync.getExclusiveQueuedThreads().size());
188	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
189	>	}
190
191	+	/**
192	+	* Checks that condition c has exactly the given waiter threads,
193	+	* after acquiring mutex.
194	+	*/
195	+	void assertHasWaitersUnlocked(Mutex sync, ConditionObject c,
196	+	Thread... threads) {
197	+	sync.acquire();
198	+	assertHasWaitersLocked(sync, c, threads);
199	+	sync.release();
200	+	}
201
202		/**
203	<	* hasContended reports false if no thread has ever blocked, else true
203	>	* Checks that condition c has exactly the given waiter threads.
204		*/
205	<	public void testHasContended() {
206	<	final Mutex lock = new Mutex();
207	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
208	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
209	<	try {
210	<	assertFalse(lock.hasContended());
211	<	lock.acquireExclusiveUninterruptibly(1);
212	<	t1.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
239	<	assertTrue(lock.hasContended());
240	<	t2.start();
241	<	Thread.sleep(SHORT_DELAY_MS);
242	<	assertTrue(lock.hasContended());
243	<	t1.interrupt();
244	<	Thread.sleep(SHORT_DELAY_MS);
245	<	assertTrue(lock.hasContended());
246	<	lock.releaseExclusive(1);
247	<	Thread.sleep(SHORT_DELAY_MS);
248	<	assertTrue(lock.hasContended());
249	<	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();
275	<	}
205	>	void assertHasWaitersLocked(Mutex sync, ConditionObject c,
206	>	Thread... threads) {
207	>	assertEquals(threads.length > 0, sync.hasWaiters(c));
208	>	assertEquals(threads.length, sync.getWaitQueueLength(c));
209	>	assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty());
210	>	assertEquals(threads.length, sync.getWaitingThreads(c).size());
211	>	assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)),
212	>	new HashSet<Thread>(Arrays.asList(threads)));
213		}
214
215	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
216
217		/**
218	<	* TryAcquireExclusive on a locked lock fails
218	>	* Awaits condition using the specified AwaitMethod.
219		*/
220	<	public void testTryAcquireExclusiveWhenLocked() {
221	<	final Mutex lock = new Mutex();
222	<	lock.acquireExclusiveUninterruptibly(1);
223	<	Thread t = new Thread(new Runnable() {
224	<	public void run() {
225	<	threadAssertFalse(lock.tryAcquireExclusive(1));
226	<	}
227	<	});
220	>	void await(ConditionObject c, AwaitMethod awaitMethod)
221	>	throws InterruptedException {
222	>	long timeoutMillis = 2 * LONG_DELAY_MS;
223	>	switch (awaitMethod) {
224	>	case await:
225	>	c.await();
226	>	break;
227	>	case awaitTimed:
228	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
229	>	break;
230	>	case awaitNanos:
231	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
232	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
233	>	assertTrue(nanosRemaining > 0);
234	>	break;
235	>	case awaitUntil:
236	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
237	>	break;
238	>	default:
239	>	throw new AssertionError();
240	>	}
241	>	}
242	>
243	>	/**
244	>	* Checks that awaiting the given condition times out (using the
245	>	* default timeout duration).
246	>	*/
247	>	void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
248	>	final long timeoutMillis = timeoutMillis();
249	>	final long startTime;
250		try {
251	<	t.start();
252	<	t.join();
253	<	lock.releaseExclusive(1);
254	<	} catch(Exception e){
255	<	unexpectedException();
256	<	}
257	<	}
258	<
259	<	/**
260	<	* acquireExclusiveNanos on a locked lock times out
261	<	*/
262	<	public void testAcquireExclusiveNanos_Timeout() {
263	<	final Mutex lock = new Mutex();
264	<	lock.acquireExclusiveUninterruptibly(1);
265	<	Thread t = new Thread(new Runnable() {
266	<	public void run() {
267	<	try {
268	<	threadAssertFalse(lock.acquireExclusiveNanos(1, 1000 * 1000));
269	<	} catch (Exception ex) {
270	<	threadUnexpectedException();
271	<	}
272	<	}
273	<	});
251	>	switch (awaitMethod) {
252	>	case awaitTimed:
253	>	startTime = System.nanoTime();
254	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
255	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
256	>	break;
257	>	case awaitNanos:
258	>	startTime = System.nanoTime();
259	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
260	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
261	>	assertTrue(nanosRemaining <= 0);
262	>	assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS));
263	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
264	>	break;
265	>	case awaitUntil:
266	>	// We shouldn't assume that nanoTime and currentTimeMillis
267	>	// use the same time source, so don't use nanoTime here.
268	>	java.util.Date delayedDate = delayedDate(timeoutMillis);
269	>	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
270	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
271	>	break;
272	>	default:
273	>	throw new UnsupportedOperationException();
274	>	}
275	>	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
276	>	}
277	>
278	>	/**
279	>	* isHeldExclusively is false upon construction
280	>	*/
281	>	public void testIsHeldExclusively() {
282	>	Mutex sync = new Mutex();
283	>	assertFalse(sync.isHeldExclusively());
284	>	}
285	>
286	>	/**
287	>	* acquiring released sync succeeds
288	>	*/
289	>	public void testAcquire() {
290	>	Mutex sync = new Mutex();
291	>	sync.acquire();
292	>	assertTrue(sync.isHeldExclusively());
293	>	sync.release();
294	>	assertFalse(sync.isHeldExclusively());
295	>	}
296	>
297	>	/**
298	>	* tryAcquire on a released sync succeeds
299	>	*/
300	>	public void testTryAcquire() {
301	>	Mutex sync = new Mutex();
302	>	assertTrue(sync.tryAcquire());
303	>	assertTrue(sync.isHeldExclusively());
304	>	sync.release();
305	>	assertFalse(sync.isHeldExclusively());
306	>	}
307	>
308	>	/**
309	>	* hasQueuedThreads reports whether there are waiting threads
310	>	*/
311	>	public void testHasQueuedThreads() {
312	>	final Mutex sync = new Mutex();
313	>	assertFalse(sync.hasQueuedThreads());
314	>	sync.acquire();
315	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
316	>	waitForQueuedThread(sync, t1);
317	>	assertTrue(sync.hasQueuedThreads());
318	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
319	>	waitForQueuedThread(sync, t2);
320	>	assertTrue(sync.hasQueuedThreads());
321	>	t1.interrupt();
322	>	awaitTermination(t1);
323	>	assertTrue(sync.hasQueuedThreads());
324	>	sync.release();
325	>	awaitTermination(t2);
326	>	assertFalse(sync.hasQueuedThreads());
327	>	}
328	>
329	>	/**
330	>	* isQueued(null) throws NullPointerException
331	>	*/
332	>	public void testIsQueuedNPE() {
333	>	final Mutex sync = new Mutex();
334		try {
335	<	t.start();
336	<	t.join();
337	<	lock.releaseExclusive(1);
338	<	} catch(Exception e){
339	<	unexpectedException();
340	<	}
341	<	}
342	<
343	<
335	>	sync.isQueued(null);
336	>	shouldThrow();
337	>	} catch (NullPointerException success) {}
338	>	}
339	>
340	>	/**
341	>	* isQueued reports whether a thread is queued
342	>	*/
343	>	public void testIsQueued() {
344	>	final Mutex sync = new Mutex();
345	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
346	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
347	>	assertFalse(sync.isQueued(t1));
348	>	assertFalse(sync.isQueued(t2));
349	>	sync.acquire();
350	>	t1.start();
351	>	waitForQueuedThread(sync, t1);
352	>	assertTrue(sync.isQueued(t1));
353	>	assertFalse(sync.isQueued(t2));
354	>	t2.start();
355	>	waitForQueuedThread(sync, t2);
356	>	assertTrue(sync.isQueued(t1));
357	>	assertTrue(sync.isQueued(t2));
358	>	t1.interrupt();
359	>	awaitTermination(t1);
360	>	assertFalse(sync.isQueued(t1));
361	>	assertTrue(sync.isQueued(t2));
362	>	sync.release();
363	>	awaitTermination(t2);
364	>	assertFalse(sync.isQueued(t1));
365	>	assertFalse(sync.isQueued(t2));
366	>	}
367	>
368	>	/**
369	>	* getFirstQueuedThread returns first waiting thread or null if none
370	>	*/
371	>	public void testGetFirstQueuedThread() {
372	>	final Mutex sync = new Mutex();
373	>	assertNull(sync.getFirstQueuedThread());
374	>	sync.acquire();
375	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
376	>	waitForQueuedThread(sync, t1);
377	>	assertEquals(t1, sync.getFirstQueuedThread());
378	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
379	>	waitForQueuedThread(sync, t2);
380	>	assertEquals(t1, sync.getFirstQueuedThread());
381	>	t1.interrupt();
382	>	awaitTermination(t1);
383	>	assertEquals(t2, sync.getFirstQueuedThread());
384	>	sync.release();
385	>	awaitTermination(t2);
386	>	assertNull(sync.getFirstQueuedThread());
387	>	}
388	>
389	>	/**
390	>	* hasContended reports false if no thread has ever blocked, else true
391	>	*/
392	>	public void testHasContended() {
393	>	final Mutex sync = new Mutex();
394	>	assertFalse(sync.hasContended());
395	>	sync.acquire();
396	>	assertFalse(sync.hasContended());
397	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
398	>	waitForQueuedThread(sync, t1);
399	>	assertTrue(sync.hasContended());
400	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
401	>	waitForQueuedThread(sync, t2);
402	>	assertTrue(sync.hasContended());
403	>	t1.interrupt();
404	>	awaitTermination(t1);
405	>	assertTrue(sync.hasContended());
406	>	sync.release();
407	>	awaitTermination(t2);
408	>	assertTrue(sync.hasContended());
409	>	}
410	>
411	>	/**
412	>	* getQueuedThreads returns all waiting threads
413	>	*/
414	>	public void testGetQueuedThreads() {
415	>	final Mutex sync = new Mutex();
416	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
417	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
418	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
419	>	sync.acquire();
420	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
421	>	t1.start();
422	>	waitForQueuedThread(sync, t1);
423	>	assertHasExclusiveQueuedThreads(sync, t1);
424	>	assertTrue(sync.getQueuedThreads().contains(t1));
425	>	assertFalse(sync.getQueuedThreads().contains(t2));
426	>	t2.start();
427	>	waitForQueuedThread(sync, t2);
428	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
429	>	assertTrue(sync.getQueuedThreads().contains(t1));
430	>	assertTrue(sync.getQueuedThreads().contains(t2));
431	>	t1.interrupt();
432	>	awaitTermination(t1);
433	>	assertHasExclusiveQueuedThreads(sync, t2);
434	>	sync.release();
435	>	awaitTermination(t2);
436	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
437	>	}
438	>
439	>	/**
440	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
441	>	*/
442	>	public void testGetExclusiveQueuedThreads() {
443	>	final Mutex sync = new Mutex();
444	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
445	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
446	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
447	>	sync.acquire();
448	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
449	>	t1.start();
450	>	waitForQueuedThread(sync, t1);
451	>	assertHasExclusiveQueuedThreads(sync, t1);
452	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
453	>	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
454	>	t2.start();
455	>	waitForQueuedThread(sync, t2);
456	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
457	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
458	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
459	>	t1.interrupt();
460	>	awaitTermination(t1);
461	>	assertHasExclusiveQueuedThreads(sync, t2);
462	>	sync.release();
463	>	awaitTermination(t2);
464	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
465	>	}
466	>
467	>	/**
468	>	* getSharedQueuedThreads does not include exclusively waiting threads
469	>	*/
470	>	public void testGetSharedQueuedThreads_Exclusive() {
471	>	final Mutex sync = new Mutex();
472	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
473	>	sync.acquire();
474	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
475	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
476	>	waitForQueuedThread(sync, t1);
477	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
478	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
479	>	waitForQueuedThread(sync, t2);
480	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
481	>	t1.interrupt();
482	>	awaitTermination(t1);
483	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
484	>	sync.release();
485	>	awaitTermination(t2);
486	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
487	>	}
488	>
489	>	/**
490	>	* getSharedQueuedThreads returns all shared waiting threads
491	>	*/
492	>	public void testGetSharedQueuedThreads_Shared() {
493	>	final BooleanLatch l = new BooleanLatch();
494	>	assertHasSharedQueuedThreads(l, NO_THREADS);
495	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
496	>	public void realRun() throws InterruptedException {
497	>	l.acquireSharedInterruptibly(0);
498	>	}});
499	>	waitForQueuedThread(l, t1);
500	>	assertHasSharedQueuedThreads(l, t1);
501	>	Thread t2 = newStartedThread(new CheckedRunnable() {
502	>	public void realRun() throws InterruptedException {
503	>	l.acquireSharedInterruptibly(0);
504	>	}});
505	>	waitForQueuedThread(l, t2);
506	>	assertHasSharedQueuedThreads(l, t1, t2);
507	>	t1.interrupt();
508	>	awaitTermination(t1);
509	>	assertHasSharedQueuedThreads(l, t2);
510	>	assertTrue(l.releaseShared(0));
511	>	awaitTermination(t2);
512	>	assertHasSharedQueuedThreads(l, NO_THREADS);
513	>	}
514	>
515	>	/**
516	>	* tryAcquireNanos is interruptible
517	>	*/
518	>	public void testTryAcquireNanos_Interruptible() {
519	>	final Mutex sync = new Mutex();
520	>	sync.acquire();
521	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
522	>	public void realRun() throws InterruptedException {
523	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
524	>	}});
525	>
526	>	waitForQueuedThread(sync, t);
527	>	t.interrupt();
528	>	awaitTermination(t);
529	>	}
530	>
531	>	/**
532	>	* tryAcquire on exclusively held sync fails
533	>	*/
534	>	public void testTryAcquireWhenSynced() {
535	>	final Mutex sync = new Mutex();
536	>	sync.acquire();
537	>	Thread t = newStartedThread(new CheckedRunnable() {
538	>	public void realRun() {
539	>	assertFalse(sync.tryAcquire());
540	>	}});
541	>
542	>	awaitTermination(t);
543	>	sync.release();
544	>	}
545	>
546	>	/**
547	>	* tryAcquireNanos on an exclusively held sync times out
548	>	*/
549	>	public void testAcquireNanos_Timeout() {
550	>	final Mutex sync = new Mutex();
551	>	sync.acquire();
552	>	Thread t = newStartedThread(new CheckedRunnable() {
553	>	public void realRun() throws InterruptedException {
554	>	long startTime = System.nanoTime();
555	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
556	>	assertFalse(sync.tryAcquireNanos(nanos));
557	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
558	>	}});
559	>
560	>	awaitTermination(t);
561	>	sync.release();
562	>	}
563	>
564		/**
565		* getState is true when acquired and false when not
566		*/
567		public void testGetState() {
568	<	final Mutex lock = new Mutex();
569	<	lock.acquireExclusiveUninterruptibly(1);
570	<	assertTrue(lock.isLocked());
571	<	lock.releaseExclusive(1);
572	<	assertFalse(lock.isLocked());
573	<	Thread t = new Thread(new Runnable() {
574	<	public void run() {
575	<	lock.acquireExclusiveUninterruptibly(1);
576	<	try {
577	<	Thread.sleep(SMALL_DELAY_MS);
578	<	}
579	<	catch(Exception e) {
580	<	threadUnexpectedException();
581	<	}
582	<	lock.releaseExclusive(1);
583	<	}
584	<	});
585	<	try {
586	<	t.start();
587	<	Thread.sleep(SHORT_DELAY_MS);
588	<	assertTrue(lock.isLocked());
589	<	t.join();
590	<	assertFalse(lock.isLocked());
591	<	} catch(Exception e){
592	<	unexpectedException();
568	>	final Mutex sync = new Mutex();
569	>	sync.acquire();
570	>	assertTrue(sync.isHeldExclusively());
571	>	sync.release();
572	>	assertFalse(sync.isHeldExclusively());
573	>
574	>	final BooleanLatch acquired = new BooleanLatch();
575	>	final BooleanLatch done = new BooleanLatch();
576	>	Thread t = newStartedThread(new CheckedRunnable() {
577	>	public void realRun() throws InterruptedException {
578	>	sync.acquire();
579	>	assertTrue(acquired.releaseShared(0));
580	>	done.acquireShared(0);
581	>	sync.release();
582	>	}});
583	>
584	>	acquired.acquireShared(0);
585	>	assertTrue(sync.isHeldExclusively());
586	>	assertTrue(done.releaseShared(0));
587	>	awaitTermination(t);
588	>	assertFalse(sync.isHeldExclusively());
589	>	}
590	>
591	>	/**
592	>	* acquireInterruptibly succeeds when released, else is interruptible
593	>	*/
594	>	public void testAcquireInterruptibly() throws InterruptedException {
595	>	final Mutex sync = new Mutex();
596	>	final BooleanLatch threadStarted = new BooleanLatch();
597	>	sync.acquireInterruptibly();
598	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
599	>	public void realRun() throws InterruptedException {
600	>	assertTrue(threadStarted.releaseShared(0));
601	>	sync.acquireInterruptibly();
602	>	}});
603	>
604	>	threadStarted.acquireShared(0);
605	>	waitForQueuedThread(sync, t);
606	>	t.interrupt();
607	>	awaitTermination(t);
608	>	assertTrue(sync.isHeldExclusively());
609	>	}
610	>
611	>	/**
612	>	* owns is true for a condition created by sync else false
613	>	*/
614	>	public void testOwns() {
615	>	final Mutex sync = new Mutex();
616	>	final ConditionObject c = sync.newCondition();
617	>	final Mutex sync2 = new Mutex();
618	>	assertTrue(sync.owns(c));
619	>	assertFalse(sync2.owns(c));
620	>	}
621	>
622	>	/**
623	>	* Calling await without holding sync throws IllegalMonitorStateException
624	>	*/
625	>	public void testAwait_IMSE() {
626	>	final Mutex sync = new Mutex();
627	>	final ConditionObject c = sync.newCondition();
628	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
629	>	long startTime = System.nanoTime();
630	>	try {
631	>	await(c, awaitMethod);
632	>	shouldThrow();
633	>	} catch (IllegalMonitorStateException success) {
634	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
635	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
636		}
637		}
638
639	+	/**
640	+	* Calling signal without holding sync throws IllegalMonitorStateException
641	+	*/
642	+	public void testSignal_IMSE() {
643	+	final Mutex sync = new Mutex();
644	+	final ConditionObject c = sync.newCondition();
645	+	try {
646	+	c.signal();
647	+	shouldThrow();
648	+	} catch (IllegalMonitorStateException success) {}
649	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
650	+	}
651
652		/**
653	<	* acquireExclusiveInterruptibly is interruptible.
653	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
654		*/
655	<	public void testAcquireInterruptibly1() {
656	<	final Mutex lock = new Mutex();
657	<	lock.acquireExclusiveUninterruptibly(1);
363	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
655	>	public void testSignalAll_IMSE() {
656	>	final Mutex sync = new Mutex();
657	>	final ConditionObject c = sync.newCondition();
658		try {
659	<	t.start();
660	<	t.interrupt();
661	<	lock.releaseExclusive(1);
662	<	t.join();
369	<	} catch(Exception e){
370	<	unexpectedException();
371	<	}
372	<	}
659	>	c.signalAll();
660	>	shouldThrow();
661	>	} catch (IllegalMonitorStateException success) {}
662	>	}
663
664		/**
665	<	* acquireExclusiveInterruptibly succeeds when released, else is interruptible
665	>	* await/awaitNanos/awaitUntil without a signal times out
666		*/
667	<	public void testAcquireInterruptibly2() {
668	<	final Mutex lock = new Mutex();
669	<	try {
670	<	lock.acquireExclusiveInterruptibly(1);
671	<	} catch(Exception e) {
672	<	unexpectedException();
673	<	}
674	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
667	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
668	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
669	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
670	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
671	>	final Mutex sync = new Mutex();
672	>	final ConditionObject c = sync.newCondition();
673	>	sync.acquire();
674	>	assertAwaitTimesOut(c, awaitMethod);
675	>	sync.release();
676	>	}
677	>
678	>	/**
679	>	* await/awaitNanos/awaitUntil returns when signalled
680	>	*/
681	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
682	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
683	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
684	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
685	>	public void testSignal(final AwaitMethod awaitMethod) {
686	>	final Mutex sync = new Mutex();
687	>	final ConditionObject c = sync.newCondition();
688	>	final BooleanLatch acquired = new BooleanLatch();
689	>	Thread t = newStartedThread(new CheckedRunnable() {
690	>	public void realRun() throws InterruptedException {
691	>	sync.acquire();
692	>	assertTrue(acquired.releaseShared(0));
693	>	await(c, awaitMethod);
694	>	sync.release();
695	>	}});
696	>
697	>	acquired.acquireShared(0);
698	>	sync.acquire();
699	>	assertHasWaitersLocked(sync, c, t);
700	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
701	>	c.signal();
702	>	assertHasWaitersLocked(sync, c, NO_THREADS);
703	>	assertHasExclusiveQueuedThreads(sync, t);
704	>	sync.release();
705	>	awaitTermination(t);
706	>	}
707	>
708	>	/**
709	>	* hasWaiters(null) throws NullPointerException
710	>	*/
711	>	public void testHasWaitersNPE() {
712	>	final Mutex sync = new Mutex();
713		try {
714	<	t.start();
715	<	t.interrupt();
716	<	assertTrue(lock.isLocked());
389	<	t.join();
390	<	} catch(Exception e){
391	<	unexpectedException();
392	<	}
714	>	sync.hasWaiters(null);
715	>	shouldThrow();
716	>	} catch (NullPointerException success) {}
717		}
718
719		/**
720	<	* owns is true for a condition created by lock else false
720	>	* getWaitQueueLength(null) throws NullPointerException
721		*/
722	<	public void testOwns() {
723	<	final Mutex lock = new Mutex();
724	<	final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition();
725	<	final Mutex lock2 = new Mutex();
726	<	assertTrue(lock.owns(c));
727	<	assertFalse(lock2.owns(c));
722	>	public void testGetWaitQueueLengthNPE() {
723	>	final Mutex sync = new Mutex();
724	>	try {
725	>	sync.getWaitQueueLength(null);
726	>	shouldThrow();
727	>	} catch (NullPointerException success) {}
728		}
729
730		/**
731	<	* Calling await without holding lock throws IllegalMonitorStateException
731	>	* getWaitingThreads(null) throws NullPointerException
732		*/
733	<	public void testAwait_IllegalMonitor() {
734	<	final Mutex lock = new Mutex();
411	<	final Condition c = lock.newCondition();
733	>	public void testGetWaitingThreadsNPE() {
734	>	final Mutex sync = new Mutex();
735		try {
736	<	c.await();
736	>	sync.getWaitingThreads(null);
737		shouldThrow();
738	<	}
416	<	catch (IllegalMonitorStateException success) {
417	<	}
418	<	catch (Exception ex) {
419	<	unexpectedException();
420	<	}
738	>	} catch (NullPointerException success) {}
739		}
740
741		/**
742	<	* Calling signal without holding lock throws IllegalMonitorStateException
742	>	* hasWaiters throws IllegalArgumentException if not owned
743		*/
744	<	public void testSignal_IllegalMonitor() {
745	<	final Mutex lock = new Mutex();
746	<	final Condition c = lock.newCondition();
744	>	public void testHasWaitersIAE() {
745	>	final Mutex sync = new Mutex();
746	>	final ConditionObject c = sync.newCondition();
747	>	final Mutex sync2 = new Mutex();
748		try {
749	<	c.signal();
749	>	sync2.hasWaiters(c);
750		shouldThrow();
751	<	}
752	<	catch (IllegalMonitorStateException success) {
434	<	}
435	<	catch (Exception ex) {
436	<	unexpectedException();
437	<	}
751	>	} catch (IllegalArgumentException success) {}
752	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
753		}
754
755		/**
756	<	* awaitNanos without a signal times out
756	>	* hasWaiters throws IllegalMonitorStateException if not synced
757		*/
758	<	public void testAwaitNanos_Timeout() {
759	<	final Mutex lock = new Mutex();
760	<	final Condition c = lock.newCondition();
758	>	public void testHasWaitersIMSE() {
759	>	final Mutex sync = new Mutex();
760	>	final ConditionObject c = sync.newCondition();
761		try {
762	<	lock.acquireExclusiveUninterruptibly(1);
763	<	long t = c.awaitNanos(100);
764	<	assertTrue(t <= 0);
765	<	lock.releaseExclusive(1);
451	<	}
452	<	catch (Exception ex) {
453	<	unexpectedException();
454	<	}
762	>	sync.hasWaiters(c);
763	>	shouldThrow();
764	>	} catch (IllegalMonitorStateException success) {}
765	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
766		}
767
768		/**
769	<	*  timed await without a signal times out
769	>	* getWaitQueueLength throws IllegalArgumentException if not owned
770		*/
771	<	public void testAwait_Timeout() {
772	<	final Mutex lock = new Mutex();
773	<	final Condition c = lock.newCondition();
771	>	public void testGetWaitQueueLengthIAE() {
772	>	final Mutex sync = new Mutex();
773	>	final ConditionObject c = sync.newCondition();
774	>	final Mutex sync2 = new Mutex();
775		try {
776	<	lock.acquireExclusiveUninterruptibly(1);
777	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
778	<	lock.releaseExclusive(1);
779	<	}
468	<	catch (Exception ex) {
469	<	unexpectedException();
470	<	}
776	>	sync2.getWaitQueueLength(c);
777	>	shouldThrow();
778	>	} catch (IllegalArgumentException success) {}
779	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
780		}
781
782		/**
783	<	* awaitUntil without a signal times out
783	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
784		*/
785	<	public void testAwaitUntil_Timeout() {
786	<	final Mutex lock = new Mutex();
787	<	final Condition c = lock.newCondition();
785	>	public void testGetWaitQueueLengthIMSE() {
786	>	final Mutex sync = new Mutex();
787	>	final ConditionObject c = sync.newCondition();
788		try {
789	<	lock.acquireExclusiveUninterruptibly(1);
790	<	java.util.Date d = new java.util.Date();
791	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
792	<	lock.releaseExclusive(1);
484	<	}
485	<	catch (Exception ex) {
486	<	unexpectedException();
487	<	}
789	>	sync.getWaitQueueLength(c);
790	>	shouldThrow();
791	>	} catch (IllegalMonitorStateException success) {}
792	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
793		}
794
795		/**
796	<	* await returns when signalled
796	>	* getWaitingThreads throws IllegalArgumentException if not owned
797		*/
798	<	public void testAwait() {
799	<	final Mutex lock = new Mutex();
800	<	final Condition c = lock.newCondition();
801	<	Thread t = new Thread(new Runnable() {
802	<	public void run() {
803	<	try {
804	<	lock.acquireExclusiveUninterruptibly(1);
805	<	c.await();
806	<	lock.releaseExclusive(1);
807	<	}
503	<	catch(InterruptedException e) {
504	<	threadUnexpectedException();
505	<	}
506	<	}
507	<	});
798	>	public void testGetWaitingThreadsIAE() {
799	>	final Mutex sync = new Mutex();
800	>	final ConditionObject c = sync.newCondition();
801	>	final Mutex sync2 = new Mutex();
802	>	try {
803	>	sync2.getWaitingThreads(c);
804	>	shouldThrow();
805	>	} catch (IllegalArgumentException success) {}
806	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
807	>	}
808
809	+	/**
810	+	* getWaitingThreads throws IllegalMonitorStateException if not synced
811	+	*/
812	+	public void testGetWaitingThreadsIMSE() {
813	+	final Mutex sync = new Mutex();
814	+	final ConditionObject c = sync.newCondition();
815		try {
816	<	t.start();
817	<	Thread.sleep(SHORT_DELAY_MS);
818	<	lock.acquireExclusiveUninterruptibly(1);
819	<	c.signal();
514	<	lock.releaseExclusive(1);
515	<	t.join(SHORT_DELAY_MS);
516	<	assertFalse(t.isAlive());
517	<	}
518	<	catch (Exception ex) {
519	<	unexpectedException();
520	<	}
816	>	sync.getWaitingThreads(c);
817	>	shouldThrow();
818	>	} catch (IllegalMonitorStateException success) {}
819	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
820		}
821
822	+	/**
823	+	* hasWaiters returns true when a thread is waiting, else false
824	+	*/
825	+	public void testHasWaiters() {
826	+	final Mutex sync = new Mutex();
827	+	final ConditionObject c = sync.newCondition();
828	+	final BooleanLatch acquired = new BooleanLatch();
829	+	Thread t = newStartedThread(new CheckedRunnable() {
830	+	public void realRun() throws InterruptedException {
831	+	sync.acquire();
832	+	assertHasWaitersLocked(sync, c, NO_THREADS);
833	+	assertFalse(sync.hasWaiters(c));
834	+	assertTrue(acquired.releaseShared(0));
835	+	c.await();
836	+	sync.release();
837	+	}});
838	+
839	+	acquired.acquireShared(0);
840	+	sync.acquire();
841	+	assertHasWaitersLocked(sync, c, t);
842	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
843	+	assertTrue(sync.hasWaiters(c));
844	+	c.signal();
845	+	assertHasWaitersLocked(sync, c, NO_THREADS);
846	+	assertHasExclusiveQueuedThreads(sync, t);
847	+	assertFalse(sync.hasWaiters(c));
848	+	sync.release();
849	+
850	+	awaitTermination(t);
851	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
852	+	}
853	+
854	+	/**
855	+	* getWaitQueueLength returns number of waiting threads
856	+	*/
857	+	public void testGetWaitQueueLength() {
858	+	final Mutex sync = new Mutex();
859	+	final ConditionObject c = sync.newCondition();
860	+	final BooleanLatch acquired1 = new BooleanLatch();
861	+	final BooleanLatch acquired2 = new BooleanLatch();
862	+	final Thread t1 = newStartedThread(new CheckedRunnable() {
863	+	public void realRun() throws InterruptedException {
864	+	sync.acquire();
865	+	assertHasWaitersLocked(sync, c, NO_THREADS);
866	+	assertEquals(0, sync.getWaitQueueLength(c));
867	+	assertTrue(acquired1.releaseShared(0));
868	+	c.await();
869	+	sync.release();
870	+	}});
871	+	acquired1.acquireShared(0);
872	+	sync.acquire();
873	+	assertHasWaitersLocked(sync, c, t1);
874	+	assertEquals(1, sync.getWaitQueueLength(c));
875	+	sync.release();
876	+
877	+	final Thread t2 = newStartedThread(new CheckedRunnable() {
878	+	public void realRun() throws InterruptedException {
879	+	sync.acquire();
880	+	assertHasWaitersLocked(sync, c, t1);
881	+	assertEquals(1, sync.getWaitQueueLength(c));
882	+	assertTrue(acquired2.releaseShared(0));
883	+	c.await();
884	+	sync.release();
885	+	}});
886	+	acquired2.acquireShared(0);
887	+	sync.acquire();
888	+	assertHasWaitersLocked(sync, c, t1, t2);
889	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
890	+	assertEquals(2, sync.getWaitQueueLength(c));
891	+	c.signalAll();
892	+	assertHasWaitersLocked(sync, c, NO_THREADS);
893	+	assertHasExclusiveQueuedThreads(sync, t1, t2);
894	+	assertEquals(0, sync.getWaitQueueLength(c));
895	+	sync.release();
896	+
897	+	awaitTermination(t1);
898	+	awaitTermination(t2);
899	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
900	+	}
901	+
902	+	/**
903	+	* getWaitingThreads returns only and all waiting threads
904	+	*/
905	+	public void testGetWaitingThreads() {
906	+	final Mutex sync = new Mutex();
907	+	final ConditionObject c = sync.newCondition();
908	+	final BooleanLatch acquired1 = new BooleanLatch();
909	+	final BooleanLatch acquired2 = new BooleanLatch();
910	+	final Thread t1 = new Thread(new CheckedRunnable() {
911	+	public void realRun() throws InterruptedException {
912	+	sync.acquire();
913	+	assertHasWaitersLocked(sync, c, NO_THREADS);
914	+	assertTrue(sync.getWaitingThreads(c).isEmpty());
915	+	assertTrue(acquired1.releaseShared(0));
916	+	c.await();
917	+	sync.release();
918	+	}});
919	+
920	+	final Thread t2 = new Thread(new CheckedRunnable() {
921	+	public void realRun() throws InterruptedException {
922	+	sync.acquire();
923	+	assertHasWaitersLocked(sync, c, t1);
924	+	assertTrue(sync.getWaitingThreads(c).contains(t1));
925	+	assertFalse(sync.getWaitingThreads(c).isEmpty());
926	+	assertEquals(1, sync.getWaitingThreads(c).size());
927	+	assertTrue(acquired2.releaseShared(0));
928	+	c.await();
929	+	sync.release();
930	+	}});
931	+
932	+	sync.acquire();
933	+	assertHasWaitersLocked(sync, c, NO_THREADS);
934	+	assertFalse(sync.getWaitingThreads(c).contains(t1));
935	+	assertFalse(sync.getWaitingThreads(c).contains(t2));
936	+	assertTrue(sync.getWaitingThreads(c).isEmpty());
937	+	assertEquals(0, sync.getWaitingThreads(c).size());
938	+	sync.release();
939	+
940	+	t1.start();
941	+	acquired1.acquireShared(0);
942	+	sync.acquire();
943	+	assertHasWaitersLocked(sync, c, t1);
944	+	assertTrue(sync.getWaitingThreads(c).contains(t1));
945	+	assertFalse(sync.getWaitingThreads(c).contains(t2));
946	+	assertFalse(sync.getWaitingThreads(c).isEmpty());
947	+	assertEquals(1, sync.getWaitingThreads(c).size());
948	+	sync.release();
949	+
950	+	t2.start();
951	+	acquired2.acquireShared(0);
952	+	sync.acquire();
953	+	assertHasWaitersLocked(sync, c, t1, t2);
954	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
955	+	assertTrue(sync.getWaitingThreads(c).contains(t1));
956	+	assertTrue(sync.getWaitingThreads(c).contains(t2));
957	+	assertFalse(sync.getWaitingThreads(c).isEmpty());
958	+	assertEquals(2, sync.getWaitingThreads(c).size());
959	+	c.signalAll();
960	+	assertHasWaitersLocked(sync, c, NO_THREADS);
961	+	assertHasExclusiveQueuedThreads(sync, t1, t2);
962	+	assertFalse(sync.getWaitingThreads(c).contains(t1));
963	+	assertFalse(sync.getWaitingThreads(c).contains(t2));
964	+	assertTrue(sync.getWaitingThreads(c).isEmpty());
965	+	assertEquals(0, sync.getWaitingThreads(c).size());
966	+	sync.release();
967	+
968	+	awaitTermination(t1);
969	+	awaitTermination(t2);
970	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
971	+	}
972	+
973	+	/**
974	+	* awaitUninterruptibly is uninterruptible
975	+	*/
976	+	public void testAwaitUninterruptibly() {
977	+	final Mutex sync = new Mutex();
978	+	final ConditionObject condition = sync.newCondition();
979	+	final BooleanLatch pleaseInterrupt = new BooleanLatch();
980	+	Thread t = newStartedThread(new CheckedRunnable() {
981	+	public void realRun() {
982	+	sync.acquire();
983	+	assertTrue(pleaseInterrupt.releaseShared(0));
984	+	condition.awaitUninterruptibly();
985	+	assertTrue(Thread.interrupted());
986	+	assertHasWaitersLocked(sync, condition, NO_THREADS);
987	+	sync.release();
988	+	}});
989	+
990	+	pleaseInterrupt.acquireShared(0);
991	+	sync.acquire();
992	+	assertHasWaitersLocked(sync, condition, t);
993	+	sync.release();
994	+	t.interrupt();
995	+	assertHasWaitersUnlocked(sync, condition, t);
996	+	assertThreadBlocks(t, Thread.State.WAITING);
997	+	sync.acquire();
998	+	assertHasWaitersLocked(sync, condition, t);
999	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1000	+	condition.signal();
1001	+	assertHasWaitersLocked(sync, condition, NO_THREADS);
1002	+	assertHasExclusiveQueuedThreads(sync, t);
1003	+	sync.release();
1004	+	awaitTermination(t);
1005	+	}
1006	+
1007	+	/**
1008	+	* await/awaitNanos/awaitUntil is interruptible
1009	+	*/
1010	+	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
1011	+	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
1012	+	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
1013	+	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
1014	+	public void testInterruptible(final AwaitMethod awaitMethod) {
1015	+	final Mutex sync = new Mutex();
1016	+	final ConditionObject c = sync.newCondition();
1017	+	final BooleanLatch pleaseInterrupt = new BooleanLatch();
1018	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1019	+	public void realRun() throws InterruptedException {
1020	+	sync.acquire();
1021	+	assertTrue(pleaseInterrupt.releaseShared(0));
1022	+	await(c, awaitMethod);
1023	+	}});
1024	+
1025	+	pleaseInterrupt.acquireShared(0);
1026	+	t.interrupt();
1027	+	awaitTermination(t);
1028	+	}
1029	+
1030	+	/**
1031	+	* signalAll wakes up all threads
1032	+	*/
1033	+	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1034	+	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1035	+	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1036	+	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1037	+	public void testSignalAll(final AwaitMethod awaitMethod) {
1038	+	final Mutex sync = new Mutex();
1039	+	final ConditionObject c = sync.newCondition();
1040	+	final BooleanLatch acquired1 = new BooleanLatch();
1041	+	final BooleanLatch acquired2 = new BooleanLatch();
1042	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1043	+	public void realRun() throws InterruptedException {
1044	+	sync.acquire();
1045	+	acquired1.releaseShared(0);
1046	+	await(c, awaitMethod);
1047	+	sync.release();
1048	+	}});
1049	+
1050	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1051	+	public void realRun() throws InterruptedException {
1052	+	sync.acquire();
1053	+	acquired2.releaseShared(0);
1054	+	await(c, awaitMethod);
1055	+	sync.release();
1056	+	}});
1057	+
1058	+	acquired1.acquireShared(0);
1059	+	acquired2.acquireShared(0);
1060	+	sync.acquire();
1061	+	assertHasWaitersLocked(sync, c, t1, t2);
1062	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1063	+	c.signalAll();
1064	+	assertHasWaitersLocked(sync, c, NO_THREADS);
1065	+	assertHasExclusiveQueuedThreads(sync, t1, t2);
1066	+	sync.release();
1067	+	awaitTermination(t1);
1068	+	awaitTermination(t2);
1069	+	}
1070	+
1071	+	/**
1072	+	* toString indicates current state
1073	+	*/
1074	+	public void testToString() {
1075	+	Mutex sync = new Mutex();
1076	+	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1077	+	sync.acquire();
1078	+	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1079	+	}
1080	+
1081	+	/**
1082	+	* A serialized AQS deserializes with current state, but no queued threads
1083	+	*/
1084	+	public void testSerialization() {
1085	+	Mutex sync = new Mutex();
1086	+	assertFalse(serialClone(sync).isHeldExclusively());
1087	+	sync.acquire();
1088	+	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1089	+	waitForQueuedThread(sync, t);
1090	+	assertTrue(sync.isHeldExclusively());
1091	+
1092	+	Mutex clone = serialClone(sync);
1093	+	assertTrue(clone.isHeldExclusively());
1094	+	assertHasExclusiveQueuedThreads(sync, t);
1095	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1096	+	t.interrupt();
1097	+	awaitTermination(t);
1098	+	sync.release();
1099	+	assertFalse(sync.isHeldExclusively());
1100	+	assertTrue(clone.isHeldExclusively());
1101	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1102	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1103	+	}
1104
1105		/**
1106	<	* Latch isSignalled initially returns false, then true after release
1106	>	* tryReleaseShared setting state changes getState
1107		*/
1108	<	public void testLatchIsSignalled() {
1109	<	final BooleanLatch l = new BooleanLatch();
1110	<	assertFalse(l.isSignalled());
1111	<	l.releaseShared(0);
1112	<	assertTrue(l.isSignalled());
1108	>	public void testGetStateWithReleaseShared() {
1109	>	final BooleanLatch l = new BooleanLatch();
1110	>	assertFalse(l.isSignalled());
1111	>	assertTrue(l.releaseShared(0));
1112	>	assertTrue(l.isSignalled());
1113		}
1114
1115		/**
1116	<	* release and has no effect when already signalled
1116	>	* releaseShared has no effect when already signalled
1117		*/
1118		public void testReleaseShared() {
1119	<	final BooleanLatch l = new BooleanLatch();
1120	<	assertFalse(l.isSignalled());
1121	<	l.releaseShared(0);
1122	<	assertTrue(l.isSignalled());
1123	<	l.releaseShared(0);
1124	<	assertTrue(l.isSignalled());
1119	>	final BooleanLatch l = new BooleanLatch();
1120	>	assertFalse(l.isSignalled());
1121	>	assertTrue(l.releaseShared(0));
1122	>	assertTrue(l.isSignalled());
1123	>	assertTrue(l.releaseShared(0));
1124	>	assertTrue(l.isSignalled());
1125		}
1126
1127		/**
1128		* acquireSharedInterruptibly returns after release, but not before
1129		*/
1130		public void testAcquireSharedInterruptibly() {
1131	<	final BooleanLatch l = new BooleanLatch();
1131	>	final BooleanLatch l = new BooleanLatch();
1132
1133	<	Thread t = new Thread(new Runnable() {
1134	<	public void run() {
1135	<	try {
1136	<	threadAssertFalse(l.isSignalled());
1137	<	l.acquireSharedInterruptibly(0);
1138	<	threadAssertTrue(l.isSignalled());
1139	<	} catch(InterruptedException e){
1140	<	threadUnexpectedException();
1141	<	}
1142	<	}
1143	<	});
1144	<	try {
1145	<	t.start();
1146	<	assertFalse(l.isSignalled());
1147	<	Thread.sleep(SHORT_DELAY_MS);
1148	<	l.releaseShared(0);
568	<	assertTrue(l.isSignalled());
569	<	t.join();
570	<	} catch (InterruptedException e){
571	<	unexpectedException();
572	<	}
573	<	}
574	<
575	<
576	<	/**
577	<	* acquireSharedTimed returns after release
578	<	*/
579	<	public void testAsquireSharedTimed() {
580	<	final BooleanLatch l = new BooleanLatch();
581	<
582	<	Thread t = new Thread(new Runnable() {
583	<	public void run() {
584	<	try {
585	<	threadAssertFalse(l.isSignalled());
586	<	threadAssertTrue(l.acquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
587	<	threadAssertTrue(l.isSignalled());
588	<
589	<	} catch(InterruptedException e){
590	<	threadUnexpectedException();
591	<	}
592	<	}
593	<	});
594	<	try {
595	<	t.start();
596	<	assertFalse(l.isSignalled());
597	<	Thread.sleep(SHORT_DELAY_MS);
598	<	l.releaseShared(0);
599	<	assertTrue(l.isSignalled());
600	<	t.join();
601	<	} catch (InterruptedException e){
602	<	unexpectedException();
603	<	}
1133	>	Thread t = newStartedThread(new CheckedRunnable() {
1134	>	public void realRun() throws InterruptedException {
1135	>	assertFalse(l.isSignalled());
1136	>	l.acquireSharedInterruptibly(0);
1137	>	assertTrue(l.isSignalled());
1138	>	l.acquireSharedInterruptibly(0);
1139	>	assertTrue(l.isSignalled());
1140	>	}});
1141	>
1142	>	waitForQueuedThread(l, t);
1143	>	assertFalse(l.isSignalled());
1144	>	assertThreadBlocks(t, Thread.State.WAITING);
1145	>	assertHasSharedQueuedThreads(l, t);
1146	>	assertTrue(l.releaseShared(0));
1147	>	assertTrue(l.isSignalled());
1148	>	awaitTermination(t);
1149		}
1150	<
1150	>
1151		/**
1152	<	* acquireSharedInterruptibly throws IE if interrupted before released
1152	>	* tryAcquireSharedNanos returns after release, but not before
1153		*/
1154	<	public void testAcquireSharedInterruptibly_InterruptedException() {
1154	>	public void testTryAcquireSharedNanos() {
1155		final BooleanLatch l = new BooleanLatch();
1156	<	Thread t = new Thread(new Runnable() {
1157	<	public void run() {
1158	<	try {
1159	<	threadAssertFalse(l.isSignalled());
1160	<	l.acquireSharedInterruptibly(0);
1161	<	threadShouldThrow();
1162	<	} catch(InterruptedException success){}
1163	<	}
1164	<	});
1165	<	t.start();
1166	<	try {
1167	<	assertFalse(l.isSignalled());
1168	<	t.interrupt();
1169	<	t.join();
1170	<	} catch (InterruptedException e){
1171	<	unexpectedException();
1172	<	}
1156	>
1157	>	Thread t = newStartedThread(new CheckedRunnable() {
1158	>	public void realRun() throws InterruptedException {
1159	>	assertFalse(l.isSignalled());
1160	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1161	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1162	>	assertTrue(l.isSignalled());
1163	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1164	>	assertTrue(l.isSignalled());
1165	>	}});
1166	>
1167	>	waitForQueuedThread(l, t);
1168	>	assertFalse(l.isSignalled());
1169	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
1170	>	assertTrue(l.releaseShared(0));
1171	>	assertTrue(l.isSignalled());
1172	>	awaitTermination(t);
1173		}
1174
1175		/**
1176	<	* acquireSharedTimed throws IE if interrupted before released
1176	>	* acquireSharedInterruptibly is interruptible
1177		*/
1178	<	public void testAcquireSharedNanos_InterruptedException() {
1178	>	public void testAcquireSharedInterruptibly_Interruptible() {
1179		final BooleanLatch l = new BooleanLatch();
1180	<	Thread t = new Thread(new Runnable() {
1181	<	public void run() {
1182	<	try {
1183	<	threadAssertFalse(l.isSignalled());
1184	<	l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
1185	<	threadShouldThrow();
1186	<	} catch(InterruptedException success){}
1187	<	}
1188	<	});
1189	<	t.start();
1190	<	try {
1191	<	Thread.sleep(SHORT_DELAY_MS);
1192	<	assertFalse(l.isSignalled());
1193	<	t.interrupt();
1194	<	t.join();
1195	<	} catch (InterruptedException e){
1196	<	unexpectedException();
1197	<	}
1180	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1181	>	public void realRun() throws InterruptedException {
1182	>	assertFalse(l.isSignalled());
1183	>	l.acquireSharedInterruptibly(0);
1184	>	}});
1185	>
1186	>	waitForQueuedThread(l, t);
1187	>	assertFalse(l.isSignalled());
1188	>	t.interrupt();
1189	>	awaitTermination(t);
1190	>	assertFalse(l.isSignalled());
1191	>	}
1192	>
1193	>	/**
1194	>	* tryAcquireSharedNanos is interruptible
1195	>	*/
1196	>	public void testTryAcquireSharedNanos_Interruptible() {
1197	>	final BooleanLatch l = new BooleanLatch();
1198	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1199	>	public void realRun() throws InterruptedException {
1200	>	assertFalse(l.isSignalled());
1201	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1202	>	l.tryAcquireSharedNanos(0, nanos);
1203	>	}});
1204	>
1205	>	waitForQueuedThread(l, t);
1206	>	assertFalse(l.isSignalled());
1207	>	t.interrupt();
1208	>	awaitTermination(t);
1209	>	assertFalse(l.isSignalled());
1210		}
1211
1212		/**
1213	<	* acquireSharedTimed times out if not released before timeout
1213	>	* tryAcquireSharedNanos times out if not released before timeout
1214		*/
1215	<	public void testAcquireSharedNanos_Timeout() {
1215	>	public void testTryAcquireSharedNanos_Timeout() {
1216		final BooleanLatch l = new BooleanLatch();
1217	<	Thread t = new Thread(new Runnable() {
1218	<	public void run() {
1219	<	try {
1220	<	threadAssertFalse(l.isSignalled());
1221	<	threadAssertFalse(l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1222	<	} catch(InterruptedException ie){
1223	<	threadUnexpectedException();
1224	<	}
1217	>	final BooleanLatch observedQueued = new BooleanLatch();
1218	>	Thread t = newStartedThread(new CheckedRunnable() {
1219	>	public void realRun() throws InterruptedException {
1220	>	assertFalse(l.isSignalled());
1221	>	for (long millis = timeoutMillis();
1222	>	!observedQueued.isSignalled();
1223	>	millis *= 2) {
1224	>	long nanos = MILLISECONDS.toNanos(millis);
1225	>	long startTime = System.nanoTime();
1226	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1227	>	assertTrue(millisElapsedSince(startTime) >= millis);
1228		}
1229	<	});
1230	<	t.start();
1231	<	try {
1232	<	Thread.sleep(SHORT_DELAY_MS);
1233	<	assertFalse(l.isSignalled());
1234	<	t.join();
1235	<	} catch (InterruptedException e){
1236	<	unexpectedException();
1229	>	assertFalse(l.isSignalled());
1230	>	}});
1231	>
1232	>	waitForQueuedThread(l, t);
1233	>	observedQueued.releaseShared(0);
1234	>	assertFalse(l.isSignalled());
1235	>	awaitTermination(t);
1236	>	assertFalse(l.isSignalled());
1237	>	}
1238	>
1239	>	/**
1240	>	* awaitNanos/timed await with 0 wait times out immediately
1241	>	*/
1242	>	public void testAwait_Zero() throws InterruptedException {
1243	>	final Mutex sync = new Mutex();
1244	>	final ConditionObject c = sync.newCondition();
1245	>	sync.acquire();
1246	>	assertTrue(c.awaitNanos(0L) <= 0);
1247	>	assertFalse(c.await(0L, NANOSECONDS));
1248	>	sync.release();
1249	>	}
1250	>
1251	>	/**
1252	>	* awaitNanos/timed await with maximum negative wait times does not underflow
1253	>	*/
1254	>	public void testAwait_NegativeInfinity() throws InterruptedException {
1255	>	final Mutex sync = new Mutex();
1256	>	final ConditionObject c = sync.newCondition();
1257	>	sync.acquire();
1258	>	assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
1259	>	assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
1260	>	sync.release();
1261	>	}
1262	>
1263	>	/**
1264	>	* Disabled demo test for (unfixed as of 2017-11)
1265	>	* JDK-8191483: AbstractQueuedSynchronizer cancel/cancel race
1266	>	* ant -Djsr166.tckTestClass=AbstractQueuedSynchronizerTest -Djsr166.methodFilter=testCancelCancelRace -Djsr166.runsPerTest=100 tck
1267	>	*/
1268	>	public void XXXXtestCancelCancelRace() throws InterruptedException {
1269	>	class Sync extends AbstractQueuedSynchronizer {
1270	>	private static final long serialVersionUID = 1L;
1271	>
1272	>	public boolean tryAcquire(int acquires) {
1273	>	return !hasQueuedPredecessors() && compareAndSetState(0, 1);
1274	>	}
1275	>
1276	>	protected boolean tryRelease(int releases) {
1277	>	return compareAndSetState(1, 0);
1278	>	}
1279		}
1280	+
1281	+	Sync s = new Sync();
1282	+	s.acquire(1);           // acquire to force other threads to enqueue
1283	+
1284	+	// try to trigger double cancel race with two background threads
1285	+	ArrayList<Thread> ts = new ArrayList<>();
1286	+	Runnable failedAcquire = () -> {
1287	+	try {
1288	+	s.acquireInterruptibly(1);
1289	+	throw new AssertionError();
1290	+	} catch (InterruptedException expected) {}
1291	+	};
1292	+	for (int i = 0; i < 2; i++) {
1293	+	Thread t = new Thread(failedAcquire);
1294	+	t.start();
1295	+	ts.add(t);
1296	+	}
1297	+	Thread.sleep(100);
1298	+	for (Thread t : ts) t.interrupt();
1299	+	for (Thread t : ts) t.join();
1300	+
1301	+	s.release(1);
1302	+
1303	+	// no one holds lock now, we should be able to acquire
1304	+	if (!s.tryAcquire(1))
1305	+	throw new RuntimeException(
1306	+	String.format(
1307	+	"Broken: hasQueuedPredecessors=%s hasQueuedThreads=%s queueLength=%d firstQueuedThread=%s",
1308	+	s.hasQueuedPredecessors(),
1309	+	s.hasQueuedThreads(),
1310	+	s.getQueueLength(),
1311	+	s.getFirstQueuedThread()));
1312		}
1313	<
1313	>
1314		}

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