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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.36 by jsr166, Sat Oct 9 19:30:34 2010 UTC vs.
Revision 1.54 by jsr166, Sun May 14 02:16:56 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
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–
10	–	import junit.framework.*;
11	–	import java.util.*;
12	–	import java.util.concurrent.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.util.concurrent.locks.*;
11	<	import java.io.*;
10	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
11	>
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,
31	<	* 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 isHeldExclusively() { return getState() == 1; }
38	>	/** An eccentric value for locked synchronizer state. */
39	>	static final int LOCKED = (1 << 31) | (1 << 15);
40
41	<	public boolean tryAcquire(int acquires) {
42	<	assertEquals(1, acquires);
43	<	return compareAndSetState(0, 1);
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	<	public boolean tryRelease(int releases) {
50	<	if (getState() == 0) throw new IllegalMonitorStateException();
51	<	setState(0);
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 AbstractQueuedSynchronizer.ConditionObject newCondition() {
62	<	return new AbstractQueuedSynchronizer.ConditionObject();
61	>	public boolean tryAcquireNanos(long nanos) throws InterruptedException {
62	>	return tryAcquireNanos(LOCKED, nanos);
63		}
64
65	<	}
65	>	public boolean tryAcquire() {
66	>	return tryAcquire(LOCKED);
67	>	}
68
69	+	public boolean tryRelease() {
70	+	return tryRelease(LOCKED);
71	+	}
72	+
73	+	public void acquire() {
74	+	acquire(LOCKED);
75	+	}
76	+
77	+	public void acquireInterruptibly() throws InterruptedException {
78	+	acquireInterruptibly(LOCKED);
79	+	}
80	+
81	+	public void release() {
82	+	release(LOCKED);
83	+	}
84	+
85	+	public ConditionObject newCondition() {
86	+	return new ConditionObject();
87	+	}
88	+	}
89
90		/**
91		* A simple latch class, to test shared mode.
#	Line 58 | Line 94 | public class AbstractQueuedSynchronizerT
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
100		public boolean tryReleaseShared(int ignore) {
#	Line 73 | Line 109 | public class AbstractQueuedSynchronizerT
109		*/
110		class InterruptibleSyncRunnable extends CheckedRunnable {
111		final Mutex sync;
112	<	InterruptibleSyncRunnable(Mutex l) { sync = l; }
112	>	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
113		public void realRun() throws InterruptedException {
114	<	sync.acquireInterruptibly(1);
114	>	sync.acquireInterruptibly();
115		}
116		}
117
82	–
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 l) { sync = l; }
124	>	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
125		public void realRun() throws InterruptedException {
126	<	sync.acquireInterruptibly(1);
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	>	* Spin-waits until sync.isQueued(t) becomes true.
135	>	*/
136	>	void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) {
137	>	long startTime = System.nanoTime();
138	>	while (!sync.isQueued(t)) {
139	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
140	>	throw new AssertionFailedError("timed out");
141	>	Thread.yield();
142	>	}
143	>	assertTrue(t.isAlive());
144	>	}
145	>
146	>	/**
147	>	* Checks that sync has exactly the given queued threads.
148	>	*/
149	>	void assertHasQueuedThreads(AbstractQueuedSynchronizer sync,
150	>	Thread... expected) {
151	>	Collection<Thread> actual = sync.getQueuedThreads();
152	>	assertEquals(expected.length > 0, sync.hasQueuedThreads());
153	>	assertEquals(expected.length, sync.getQueueLength());
154	>	assertEquals(expected.length, actual.size());
155	>	assertEquals(expected.length == 0, actual.isEmpty());
156	>	assertEquals(new HashSet<Thread>(actual),
157	>	new HashSet<Thread>(Arrays.asList(expected)));
158	>	}
159	>
160	>	/**
161	>	* Checks that sync has exactly the given (exclusive) queued threads.
162	>	*/
163	>	void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync,
164	>	Thread... expected) {
165	>	assertHasQueuedThreads(sync, expected);
166	>	assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()),
167	>	new HashSet<Thread>(sync.getQueuedThreads()));
168	>	assertEquals(0, sync.getSharedQueuedThreads().size());
169	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
170	>	}
171	>
172	>	/**
173	>	* Checks that sync has exactly the given (shared) queued threads.
174	>	*/
175	>	void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync,
176	>	Thread... expected) {
177	>	assertHasQueuedThreads(sync, expected);
178	>	assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()),
179	>	new HashSet<Thread>(sync.getQueuedThreads()));
180	>	assertEquals(0, sync.getExclusiveQueuedThreads().size());
181	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
182	>	}
183	>
184	>	/**
185	>	* Checks that condition c has exactly the given waiter threads,
186	>	* after acquiring mutex.
187	>	*/
188	>	void assertHasWaitersUnlocked(Mutex sync, ConditionObject c,
189	>	Thread... threads) {
190	>	sync.acquire();
191	>	assertHasWaitersLocked(sync, c, threads);
192	>	sync.release();
193	>	}
194	>
195	>	/**
196	>	* Checks that condition c has exactly the given waiter threads.
197	>	*/
198	>	void assertHasWaitersLocked(Mutex sync, ConditionObject c,
199	>	Thread... threads) {
200	>	assertEquals(threads.length > 0, sync.hasWaiters(c));
201	>	assertEquals(threads.length, sync.getWaitQueueLength(c));
202	>	assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty());
203	>	assertEquals(threads.length, sync.getWaitingThreads(c).size());
204	>	assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)),
205	>	new HashSet<Thread>(Arrays.asList(threads)));
206	>	}
207	>
208	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
209	>
210	>	/**
211	>	* Awaits condition using the specified AwaitMethod.
212	>	*/
213	>	void await(ConditionObject c, AwaitMethod awaitMethod)
214	>	throws InterruptedException {
215	>	long timeoutMillis = 2 * LONG_DELAY_MS;
216	>	switch (awaitMethod) {
217	>	case await:
218	>	c.await();
219	>	break;
220	>	case awaitTimed:
221	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
222	>	break;
223	>	case awaitNanos:
224	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
225	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
226	>	assertTrue(nanosRemaining > 0);
227	>	break;
228	>	case awaitUntil:
229	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
230	>	break;
231	>	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	+	final long timeoutMillis = timeoutMillis();
242	+	final long startTime;
243	+	try {
244	+	switch (awaitMethod) {
245	+	case awaitTimed:
246	+	startTime = System.nanoTime();
247	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
248	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
249	+	break;
250	+	case awaitNanos:
251	+	startTime = System.nanoTime();
252	+	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
253	+	long nanosRemaining = c.awaitNanos(nanosTimeout);
254	+	assertTrue(nanosRemaining <= 0);
255	+	assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS));
256	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
257	+	break;
258	+	case awaitUntil:
259	+	// We shouldn't assume that nanoTime and currentTimeMillis
260	+	// use the same time source, so don't use nanoTime here.
261	+	java.util.Date delayedDate = delayedDate(timeoutMillis);
262	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
263	+	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
264	+	break;
265	+	default:
266	+	throw new UnsupportedOperationException();
267	+	}
268	+	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
269	+	}
270	+
271	+	/**
272		* isHeldExclusively is false upon construction
273		*/
274		public void testIsHeldExclusively() {
275	<	Mutex rl = new Mutex();
276	<	assertFalse(rl.isHeldExclusively());
275	>	Mutex sync = new Mutex();
276	>	assertFalse(sync.isHeldExclusively());
277		}
278
279		/**
280		* acquiring released sync succeeds
281		*/
282		public void testAcquire() {
283	<	Mutex rl = new Mutex();
284	<	rl.acquire(1);
285	<	assertTrue(rl.isHeldExclusively());
286	<	rl.release(1);
287	<	assertFalse(rl.isHeldExclusively());
283	>	Mutex sync = new Mutex();
284	>	sync.acquire();
285	>	assertTrue(sync.isHeldExclusively());
286	>	sync.release();
287	>	assertFalse(sync.isHeldExclusively());
288		}
289
290		/**
291	<	* tryAcquire on an released sync succeeds
291	>	* tryAcquire on a released sync succeeds
292		*/
293		public void testTryAcquire() {
294	<	Mutex rl = new Mutex();
295	<	assertTrue(rl.tryAcquire(1));
296	<	assertTrue(rl.isHeldExclusively());
297	<	rl.release(1);
294	>	Mutex sync = new Mutex();
295	>	assertTrue(sync.tryAcquire());
296	>	assertTrue(sync.isHeldExclusively());
297	>	sync.release();
298	>	assertFalse(sync.isHeldExclusively());
299		}
300
301		/**
302		* hasQueuedThreads reports whether there are waiting threads
303		*/
304	<	public void testhasQueuedThreads() throws InterruptedException {
304	>	public void testHasQueuedThreads() {
305		final Mutex sync = new Mutex();
129	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
130	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
306		assertFalse(sync.hasQueuedThreads());
307	<	sync.acquire(1);
308	<	t1.start();
309	<	Thread.sleep(SHORT_DELAY_MS);
307	>	sync.acquire();
308	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
309	>	waitForQueuedThread(sync, t1);
310		assertTrue(sync.hasQueuedThreads());
311	<	t2.start();
312	<	Thread.sleep(SHORT_DELAY_MS);
311	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
312	>	waitForQueuedThread(sync, t2);
313		assertTrue(sync.hasQueuedThreads());
314		t1.interrupt();
315	<	Thread.sleep(SHORT_DELAY_MS);
315	>	awaitTermination(t1);
316		assertTrue(sync.hasQueuedThreads());
317	<	sync.release(1);
318	<	Thread.sleep(SHORT_DELAY_MS);
317	>	sync.release();
318	>	awaitTermination(t2);
319		assertFalse(sync.hasQueuedThreads());
145	–	t1.join();
146	–	t2.join();
320		}
321
322		/**
323	<	* isQueued(null) throws NPE
323	>	* isQueued(null) throws NullPointerException
324		*/
325		public void testIsQueuedNPE() {
326		final Mutex sync = new Mutex();
#	Line 158 | Line 331 | public class AbstractQueuedSynchronizerT
331		}
332
333		/**
334	<	* isQueued reports whether a thread is queued.
334	>	* isQueued reports whether a thread is queued
335		*/
336	<	public void testIsQueued() throws InterruptedException {
336	>	public void testIsQueued() {
337		final Mutex sync = new Mutex();
338		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
339		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
340		assertFalse(sync.isQueued(t1));
341		assertFalse(sync.isQueued(t2));
342	<	sync.acquire(1);
342	>	sync.acquire();
343		t1.start();
344	<	Thread.sleep(SHORT_DELAY_MS);
344	>	waitForQueuedThread(sync, t1);
345		assertTrue(sync.isQueued(t1));
346	+	assertFalse(sync.isQueued(t2));
347		t2.start();
348	<	Thread.sleep(SHORT_DELAY_MS);
348	>	waitForQueuedThread(sync, t2);
349		assertTrue(sync.isQueued(t1));
350		assertTrue(sync.isQueued(t2));
351		t1.interrupt();
352	<	Thread.sleep(SHORT_DELAY_MS);
352	>	awaitTermination(t1);
353		assertFalse(sync.isQueued(t1));
354		assertTrue(sync.isQueued(t2));
355	<	sync.release(1);
356	<	Thread.sleep(SHORT_DELAY_MS);
355	>	sync.release();
356	>	awaitTermination(t2);
357		assertFalse(sync.isQueued(t1));
184	–	Thread.sleep(SHORT_DELAY_MS);
358		assertFalse(sync.isQueued(t2));
186	–	t1.join();
187	–	t2.join();
359		}
360
361		/**
362		* getFirstQueuedThread returns first waiting thread or null if none
363		*/
364	<	public void testGetFirstQueuedThread() throws InterruptedException {
364	>	public void testGetFirstQueuedThread() {
365		final Mutex sync = new Mutex();
195	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
196	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
366		assertNull(sync.getFirstQueuedThread());
367	<	sync.acquire(1);
368	<	t1.start();
369	<	Thread.sleep(SHORT_DELAY_MS);
367	>	sync.acquire();
368	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
369	>	waitForQueuedThread(sync, t1);
370		assertEquals(t1, sync.getFirstQueuedThread());
371	<	t2.start();
372	<	Thread.sleep(SHORT_DELAY_MS);
371	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
372	>	waitForQueuedThread(sync, t2);
373		assertEquals(t1, sync.getFirstQueuedThread());
374		t1.interrupt();
375	<	Thread.sleep(SHORT_DELAY_MS);
207	<	Thread.sleep(SHORT_DELAY_MS);
375	>	awaitTermination(t1);
376		assertEquals(t2, sync.getFirstQueuedThread());
377	<	sync.release(1);
378	<	Thread.sleep(SHORT_DELAY_MS);
377	>	sync.release();
378	>	awaitTermination(t2);
379		assertNull(sync.getFirstQueuedThread());
212	–	t1.join();
213	–	t2.join();
380		}
381
216	–
382		/**
383		* hasContended reports false if no thread has ever blocked, else true
384		*/
385	<	public void testHasContended() throws InterruptedException {
385	>	public void testHasContended() {
386		final Mutex sync = new Mutex();
222	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
223	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
387		assertFalse(sync.hasContended());
388	<	sync.acquire(1);
389	<	t1.start();
390	<	Thread.sleep(SHORT_DELAY_MS);
388	>	sync.acquire();
389	>	assertFalse(sync.hasContended());
390	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
391	>	waitForQueuedThread(sync, t1);
392		assertTrue(sync.hasContended());
393	<	t2.start();
394	<	Thread.sleep(SHORT_DELAY_MS);
393	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
394	>	waitForQueuedThread(sync, t2);
395		assertTrue(sync.hasContended());
396		t1.interrupt();
397	<	Thread.sleep(SHORT_DELAY_MS);
397	>	awaitTermination(t1);
398		assertTrue(sync.hasContended());
399	<	sync.release(1);
400	<	Thread.sleep(SHORT_DELAY_MS);
399	>	sync.release();
400	>	awaitTermination(t2);
401		assertTrue(sync.hasContended());
238	–	t1.join();
239	–	t2.join();
402		}
403
404		/**
405	<	* getQueuedThreads includes waiting threads
405	>	* getQueuedThreads returns all waiting threads
406		*/
407	<	public void testGetQueuedThreads() throws InterruptedException {
407	>	public void testGetQueuedThreads() {
408		final Mutex sync = new Mutex();
409		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
410		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
411	<	assertTrue(sync.getQueuedThreads().isEmpty());
412	<	sync.acquire(1);
413	<	assertTrue(sync.getQueuedThreads().isEmpty());
411	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
412	>	sync.acquire();
413	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
414		t1.start();
415	<	Thread.sleep(SHORT_DELAY_MS);
415	>	waitForQueuedThread(sync, t1);
416	>	assertHasExclusiveQueuedThreads(sync, t1);
417		assertTrue(sync.getQueuedThreads().contains(t1));
418	+	assertFalse(sync.getQueuedThreads().contains(t2));
419		t2.start();
420	<	Thread.sleep(SHORT_DELAY_MS);
420	>	waitForQueuedThread(sync, t2);
421	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
422		assertTrue(sync.getQueuedThreads().contains(t1));
423		assertTrue(sync.getQueuedThreads().contains(t2));
424		t1.interrupt();
425	<	Thread.sleep(SHORT_DELAY_MS);
426	<	assertFalse(sync.getQueuedThreads().contains(t1));
427	<	assertTrue(sync.getQueuedThreads().contains(t2));
428	<	sync.release(1);
429	<	Thread.sleep(SHORT_DELAY_MS);
265	<	assertTrue(sync.getQueuedThreads().isEmpty());
266	<	t1.join();
267	<	t2.join();
425	>	awaitTermination(t1);
426	>	assertHasExclusiveQueuedThreads(sync, t2);
427	>	sync.release();
428	>	awaitTermination(t2);
429	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
430		}
431
432		/**
433	<	* getExclusiveQueuedThreads includes waiting threads
433	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
434		*/
435	<	public void testGetExclusiveQueuedThreads() throws InterruptedException {
435	>	public void testGetExclusiveQueuedThreads() {
436		final Mutex sync = new Mutex();
437		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
438		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
439	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
440	<	sync.acquire(1);
441	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
439	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
440	>	sync.acquire();
441	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
442		t1.start();
443	<	Thread.sleep(SHORT_DELAY_MS);
443	>	waitForQueuedThread(sync, t1);
444	>	assertHasExclusiveQueuedThreads(sync, t1);
445		assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
446	+	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
447		t2.start();
448	<	Thread.sleep(SHORT_DELAY_MS);
448	>	waitForQueuedThread(sync, t2);
449	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
450		assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
451		assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
452		t1.interrupt();
453	<	Thread.sleep(SHORT_DELAY_MS);
454	<	assertFalse(sync.getExclusiveQueuedThreads().contains(t1));
455	<	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
456	<	sync.release(1);
457	<	Thread.sleep(SHORT_DELAY_MS);
293	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
294	<	t1.join();
295	<	t2.join();
453	>	awaitTermination(t1);
454	>	assertHasExclusiveQueuedThreads(sync, t2);
455	>	sync.release();
456	>	awaitTermination(t2);
457	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
458		}
459
460		/**
461		* getSharedQueuedThreads does not include exclusively waiting threads
462		*/
463	<	public void testGetSharedQueuedThreads() throws InterruptedException {
463	>	public void testGetSharedQueuedThreads_Exclusive() {
464		final Mutex sync = new Mutex();
303	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
304	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
465		assertTrue(sync.getSharedQueuedThreads().isEmpty());
466	<	sync.acquire(1);
466	>	sync.acquire();
467		assertTrue(sync.getSharedQueuedThreads().isEmpty());
468	<	t1.start();
469	<	Thread.sleep(SHORT_DELAY_MS);
468	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
469	>	waitForQueuedThread(sync, t1);
470		assertTrue(sync.getSharedQueuedThreads().isEmpty());
471	<	t2.start();
472	<	Thread.sleep(SHORT_DELAY_MS);
471	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
472	>	waitForQueuedThread(sync, t2);
473		assertTrue(sync.getSharedQueuedThreads().isEmpty());
474		t1.interrupt();
475	<	Thread.sleep(SHORT_DELAY_MS);
475	>	awaitTermination(t1);
476		assertTrue(sync.getSharedQueuedThreads().isEmpty());
477	<	sync.release(1);
478	<	Thread.sleep(SHORT_DELAY_MS);
477	>	sync.release();
478	>	awaitTermination(t2);
479		assertTrue(sync.getSharedQueuedThreads().isEmpty());
320	–	t1.join();
321	–	t2.join();
480		}
481
482		/**
483	<	* tryAcquireNanos is interruptible.
483	>	* getSharedQueuedThreads returns all shared waiting threads
484	>	*/
485	>	public void testGetSharedQueuedThreads_Shared() {
486	>	final BooleanLatch l = new BooleanLatch();
487	>	assertHasSharedQueuedThreads(l, NO_THREADS);
488	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
489	>	public void realRun() throws InterruptedException {
490	>	l.acquireSharedInterruptibly(0);
491	>	}});
492	>	waitForQueuedThread(l, t1);
493	>	assertHasSharedQueuedThreads(l, t1);
494	>	Thread t2 = newStartedThread(new CheckedRunnable() {
495	>	public void realRun() throws InterruptedException {
496	>	l.acquireSharedInterruptibly(0);
497	>	}});
498	>	waitForQueuedThread(l, t2);
499	>	assertHasSharedQueuedThreads(l, t1, t2);
500	>	t1.interrupt();
501	>	awaitTermination(t1);
502	>	assertHasSharedQueuedThreads(l, t2);
503	>	assertTrue(l.releaseShared(0));
504	>	awaitTermination(t2);
505	>	assertHasSharedQueuedThreads(l, NO_THREADS);
506	>	}
507	>
508	>	/**
509	>	* tryAcquireNanos is interruptible
510		*/
511	<	public void testInterruptedException2() throws InterruptedException {
511	>	public void testTryAcquireNanos_Interruptible() {
512		final Mutex sync = new Mutex();
513	<	sync.acquire(1);
514	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
513	>	sync.acquire();
514	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
515		public void realRun() throws InterruptedException {
516	<	sync.tryAcquireNanos(1, MILLISECONDS.toNanos(MEDIUM_DELAY_MS));
516	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
517		}});
518
519	<	t.start();
336	<	Thread.sleep(SHORT_DELAY_MS);
519	>	waitForQueuedThread(sync, t);
520		t.interrupt();
521	<	t.join();
521	>	awaitTermination(t);
522		}
523
341	–
524		/**
525	<	* TryAcquire on exclusively held sync fails
525	>	* tryAcquire on exclusively held sync fails
526		*/
527	<	public void testTryAcquireWhenSynced() throws InterruptedException {
527	>	public void testTryAcquireWhenSynced() {
528		final Mutex sync = new Mutex();
529	<	sync.acquire(1);
530	<	Thread t = new Thread(new CheckedRunnable() {
529	>	sync.acquire();
530	>	Thread t = newStartedThread(new CheckedRunnable() {
531		public void realRun() {
532	<	assertFalse(sync.tryAcquire(1));
532	>	assertFalse(sync.tryAcquire());
533		}});
534
535	<	t.start();
536	<	t.join();
355	<	sync.release(1);
535	>	awaitTermination(t);
536	>	sync.release();
537		}
538
539		/**
540		* tryAcquireNanos on an exclusively held sync times out
541		*/
542	<	public void testAcquireNanos_Timeout() throws InterruptedException {
542	>	public void testAcquireNanos_Timeout() {
543		final Mutex sync = new Mutex();
544	<	sync.acquire(1);
545	<	Thread t = new Thread(new CheckedRunnable() {
544	>	sync.acquire();
545	>	Thread t = newStartedThread(new CheckedRunnable() {
546		public void realRun() throws InterruptedException {
547	<	long nanos = MILLISECONDS.toNanos(SHORT_DELAY_MS);
548	<	assertFalse(sync.tryAcquireNanos(1, nanos));
547	>	long startTime = System.nanoTime();
548	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
549	>	assertFalse(sync.tryAcquireNanos(nanos));
550	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
551		}});
552
553	<	t.start();
554	<	t.join();
372	<	sync.release(1);
553	>	awaitTermination(t);
554	>	sync.release();
555		}
556
375	–
557		/**
558		* getState is true when acquired and false when not
559		*/
560	<	public void testGetState() throws InterruptedException {
560	>	public void testGetState() {
561		final Mutex sync = new Mutex();
562	<	sync.acquire(1);
562	>	sync.acquire();
563		assertTrue(sync.isHeldExclusively());
564	<	sync.release(1);
564	>	sync.release();
565		assertFalse(sync.isHeldExclusively());
566	<	Thread t = new Thread(new CheckedRunnable() {
566	>
567	>	final BooleanLatch acquired = new BooleanLatch();
568	>	final BooleanLatch done = new BooleanLatch();
569	>	Thread t = newStartedThread(new CheckedRunnable() {
570		public void realRun() throws InterruptedException {
571	<	sync.acquire(1);
572	<	Thread.sleep(SMALL_DELAY_MS);
573	<	sync.release(1);
571	>	sync.acquire();
572	>	assertTrue(acquired.releaseShared(0));
573	>	done.acquireShared(0);
574	>	sync.release();
575		}});
576
577	<	t.start();
393	<	Thread.sleep(SHORT_DELAY_MS);
577	>	acquired.acquireShared(0);
578		assertTrue(sync.isHeldExclusively());
579	<	t.join();
579	>	assertTrue(done.releaseShared(0));
580	>	awaitTermination(t);
581		assertFalse(sync.isHeldExclusively());
582		}
583
399	–
400	–	/**
401	–	* acquireInterruptibly is interruptible.
402	–	*/
403	–	public void testAcquireInterruptibly1() throws InterruptedException {
404	–	final Mutex sync = new Mutex();
405	–	sync.acquire(1);
406	–	Thread t = new Thread(new InterruptedSyncRunnable(sync));
407	–
408	–	t.start();
409	–	Thread.sleep(SHORT_DELAY_MS);
410	–	t.interrupt();
411	–	Thread.sleep(SHORT_DELAY_MS);
412	–	sync.release(1);
413	–	t.join();
414	–	}
415	–
584		/**
585		* acquireInterruptibly succeeds when released, else is interruptible
586		*/
587	<	public void testAcquireInterruptibly2() throws InterruptedException {
587	>	public void testAcquireInterruptibly() throws InterruptedException {
588		final Mutex sync = new Mutex();
589	<	sync.acquireInterruptibly(1);
590	<	Thread t = new Thread(new InterruptedSyncRunnable(sync));
591	<	t.start();
592	<	Thread.sleep(SHORT_DELAY_MS);
589	>	final BooleanLatch threadStarted = new BooleanLatch();
590	>	sync.acquireInterruptibly();
591	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
592	>	public void realRun() throws InterruptedException {
593	>	assertTrue(threadStarted.releaseShared(0));
594	>	sync.acquireInterruptibly();
595	>	}});
596	>
597	>	threadStarted.acquireShared(0);
598	>	waitForQueuedThread(sync, t);
599		t.interrupt();
600	+	awaitTermination(t);
601		assertTrue(sync.isHeldExclusively());
427	–	t.join();
602		}
603
604		/**
#	Line 432 | Line 606 | public class AbstractQueuedSynchronizerT
606		*/
607		public void testOwns() {
608		final Mutex sync = new Mutex();
609	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
609	>	final ConditionObject c = sync.newCondition();
610		final Mutex sync2 = new Mutex();
611		assertTrue(sync.owns(c));
612		assertFalse(sync2.owns(c));
#	Line 441 | Line 615 | public class AbstractQueuedSynchronizerT
615		/**
616		* Calling await without holding sync throws IllegalMonitorStateException
617		*/
618	<	public void testAwait_IllegalMonitor() throws InterruptedException {
618	>	public void testAwait_IMSE() {
619		final Mutex sync = new Mutex();
620	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
621	<	try {
622	<	c.await();
623	<	shouldThrow();
624	<	} catch (IllegalMonitorStateException success) {}
620	>	final ConditionObject c = sync.newCondition();
621	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
622	>	long startTime = System.nanoTime();
623	>	try {
624	>	await(c, awaitMethod);
625	>	shouldThrow();
626	>	} catch (IllegalMonitorStateException success) {
627	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
628	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
629	>	}
630		}
631
632		/**
633		* Calling signal without holding sync throws IllegalMonitorStateException
634		*/
635	<	public void testSignal_IllegalMonitor() {
635	>	public void testSignal_IMSE() {
636		final Mutex sync = new Mutex();
637	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
637	>	final ConditionObject c = sync.newCondition();
638		try {
639		c.signal();
640		shouldThrow();
641		} catch (IllegalMonitorStateException success) {}
642	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
643		}
644
645		/**
646	<	* awaitNanos without a signal times out
646	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
647		*/
648	<	public void testAwaitNanos_Timeout() throws InterruptedException {
648	>	public void testSignalAll_IMSE() {
649		final Mutex sync = new Mutex();
650	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
651	<	sync.acquire(1);
652	<	long t = c.awaitNanos(100);
653	<	assertTrue(t <= 0);
654	<	sync.release(1);
475	<	}
476	<
477	<	/**
478	<	* Timed await without a signal times out
479	<	*/
480	<	public void testAwait_Timeout() throws InterruptedException {
481	<	final Mutex sync = new Mutex();
482	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
483	<	sync.acquire(1);
484	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
485	<	sync.release(1);
650	>	final ConditionObject c = sync.newCondition();
651	>	try {
652	>	c.signalAll();
653	>	shouldThrow();
654	>	} catch (IllegalMonitorStateException success) {}
655		}
656
657		/**
658	<	* awaitUntil without a signal times out
658	>	* await/awaitNanos/awaitUntil without a signal times out
659		*/
660	<	public void testAwaitUntil_Timeout() throws InterruptedException {
660	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
661	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
662	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
663	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
664		final Mutex sync = new Mutex();
665	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
666	<	sync.acquire(1);
667	<	java.util.Date d = new java.util.Date();
668	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
497	<	sync.release(1);
665	>	final ConditionObject c = sync.newCondition();
666	>	sync.acquire();
667	>	assertAwaitTimesOut(c, awaitMethod);
668	>	sync.release();
669		}
670
671		/**
672	<	* await returns when signalled
672	>	* await/awaitNanos/awaitUntil returns when signalled
673		*/
674	<	public void testAwait() throws InterruptedException {
674	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
675	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
676	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
677	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
678	>	public void testSignal(final AwaitMethod awaitMethod) {
679		final Mutex sync = new Mutex();
680	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
681	<	Thread t = new Thread(new CheckedRunnable() {
680	>	final ConditionObject c = sync.newCondition();
681	>	final BooleanLatch acquired = new BooleanLatch();
682	>	Thread t = newStartedThread(new CheckedRunnable() {
683		public void realRun() throws InterruptedException {
684	<	sync.acquire(1);
685	<	c.await();
686	<	sync.release(1);
684	>	sync.acquire();
685	>	assertTrue(acquired.releaseShared(0));
686	>	await(c, awaitMethod);
687	>	sync.release();
688		}});
689
690	<	t.start();
691	<	Thread.sleep(SHORT_DELAY_MS);
692	<	sync.acquire(1);
690	>	acquired.acquireShared(0);
691	>	sync.acquire();
692	>	assertHasWaitersLocked(sync, c, t);
693	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
694		c.signal();
695	<	sync.release(1);
696	<	t.join(SHORT_DELAY_MS);
697	<	assertFalse(t.isAlive());
695	>	assertHasWaitersLocked(sync, c, NO_THREADS);
696	>	assertHasExclusiveQueuedThreads(sync, t);
697	>	sync.release();
698	>	awaitTermination(t);
699		}
700
522	–
523	–
701		/**
702	<	* hasWaiters throws NPE if null
702	>	* hasWaiters(null) throws NullPointerException
703		*/
704		public void testHasWaitersNPE() {
705		final Mutex sync = new Mutex();
#	Line 533 | Line 710 | public class AbstractQueuedSynchronizerT
710		}
711
712		/**
713	<	* getWaitQueueLength throws NPE if null
713	>	* getWaitQueueLength(null) throws NullPointerException
714		*/
715		public void testGetWaitQueueLengthNPE() {
716		final Mutex sync = new Mutex();
#	Line 543 | Line 720 | public class AbstractQueuedSynchronizerT
720		} catch (NullPointerException success) {}
721		}
722
546	–
723		/**
724	<	* getWaitingThreads throws NPE if null
724	>	* getWaitingThreads(null) throws NullPointerException
725		*/
726		public void testGetWaitingThreadsNPE() {
727		final Mutex sync = new Mutex();
#	Line 555 | Line 731 | public class AbstractQueuedSynchronizerT
731		} catch (NullPointerException success) {}
732		}
733
558	–
734		/**
735	<	* hasWaiters throws IAE if not owned
735	>	* hasWaiters throws IllegalArgumentException if not owned
736		*/
737		public void testHasWaitersIAE() {
738		final Mutex sync = new Mutex();
739	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
739	>	final ConditionObject c = sync.newCondition();
740		final Mutex sync2 = new Mutex();
741		try {
742		sync2.hasWaiters(c);
743		shouldThrow();
744		} catch (IllegalArgumentException success) {}
745	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
746		}
747
748		/**
749	<	* hasWaiters throws IMSE if not synced
749	>	* hasWaiters throws IllegalMonitorStateException if not synced
750		*/
751		public void testHasWaitersIMSE() {
752		final Mutex sync = new Mutex();
753	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
753	>	final ConditionObject c = sync.newCondition();
754		try {
755		sync.hasWaiters(c);
756		shouldThrow();
757		} catch (IllegalMonitorStateException success) {}
758	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
759		}
760
584	–
761		/**
762	<	* getWaitQueueLength throws IAE if not owned
762	>	* getWaitQueueLength throws IllegalArgumentException if not owned
763		*/
764		public void testGetWaitQueueLengthIAE() {
765		final Mutex sync = new Mutex();
766	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
766	>	final ConditionObject c = sync.newCondition();
767		final Mutex sync2 = new Mutex();
768		try {
769		sync2.getWaitQueueLength(c);
770		shouldThrow();
771		} catch (IllegalArgumentException success) {}
772	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
773		}
774
775		/**
776	<	* getWaitQueueLength throws IMSE if not synced
776	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
777		*/
778		public void testGetWaitQueueLengthIMSE() {
779		final Mutex sync = new Mutex();
780	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
780	>	final ConditionObject c = sync.newCondition();
781		try {
782		sync.getWaitQueueLength(c);
783		shouldThrow();
784		} catch (IllegalMonitorStateException success) {}
785	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
786		}
787
610	–
788		/**
789	<	* getWaitingThreads throws IAE if not owned
789	>	* getWaitingThreads throws IllegalArgumentException if not owned
790		*/
791		public void testGetWaitingThreadsIAE() {
792		final Mutex sync = new Mutex();
793	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
793	>	final ConditionObject c = sync.newCondition();
794		final Mutex sync2 = new Mutex();
795		try {
796		sync2.getWaitingThreads(c);
797		shouldThrow();
798		} catch (IllegalArgumentException success) {}
799	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
800		}
801
802		/**
803	<	* getWaitingThreads throws IMSE if not synced
803	>	* getWaitingThreads throws IllegalMonitorStateException if not synced
804		*/
805		public void testGetWaitingThreadsIMSE() {
806		final Mutex sync = new Mutex();
807	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
807	>	final ConditionObject c = sync.newCondition();
808		try {
809		sync.getWaitingThreads(c);
810		shouldThrow();
811		} catch (IllegalMonitorStateException success) {}
812	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
813		}
814
636	–
637	–
815		/**
816		* hasWaiters returns true when a thread is waiting, else false
817		*/
818	<	public void testHasWaiters() throws InterruptedException {
818	>	public void testHasWaiters() {
819		final Mutex sync = new Mutex();
820	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
821	<	Thread t = new Thread(new CheckedRunnable() {
820	>	final ConditionObject c = sync.newCondition();
821	>	final BooleanLatch acquired = new BooleanLatch();
822	>	Thread t = newStartedThread(new CheckedRunnable() {
823		public void realRun() throws InterruptedException {
824	<	sync.acquire(1);
824	>	sync.acquire();
825	>	assertHasWaitersLocked(sync, c, NO_THREADS);
826		assertFalse(sync.hasWaiters(c));
827	<	assertEquals(0, sync.getWaitQueueLength(c));
827	>	assertTrue(acquired.releaseShared(0));
828		c.await();
829	<	sync.release(1);
829	>	sync.release();
830		}});
831
832	<	t.start();
833	<	Thread.sleep(SHORT_DELAY_MS);
834	<	sync.acquire(1);
832	>	acquired.acquireShared(0);
833	>	sync.acquire();
834	>	assertHasWaitersLocked(sync, c, t);
835	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
836		assertTrue(sync.hasWaiters(c));
657	–	assertEquals(1, sync.getWaitQueueLength(c));
837		c.signal();
838	<	sync.release(1);
839	<	Thread.sleep(SHORT_DELAY_MS);
661	<	sync.acquire(1);
838	>	assertHasWaitersLocked(sync, c, NO_THREADS);
839	>	assertHasExclusiveQueuedThreads(sync, t);
840		assertFalse(sync.hasWaiters(c));
841	<	assertEquals(0, sync.getWaitQueueLength(c));
842	<	sync.release(1);
843	<	t.join(SHORT_DELAY_MS);
844	<	assertFalse(t.isAlive());
841	>	sync.release();
842	>
843	>	awaitTermination(t);
844	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
845		}
846
847		/**
848		* getWaitQueueLength returns number of waiting threads
849		*/
850	<	public void testGetWaitQueueLength() throws InterruptedException {
850	>	public void testGetWaitQueueLength() {
851		final Mutex sync = new Mutex();
852	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
853	<	Thread t1 = new Thread(new CheckedRunnable() {
852	>	final ConditionObject c = sync.newCondition();
853	>	final BooleanLatch acquired1 = new BooleanLatch();
854	>	final BooleanLatch acquired2 = new BooleanLatch();
855	>	final Thread t1 = newStartedThread(new CheckedRunnable() {
856		public void realRun() throws InterruptedException {
857	<	sync.acquire(1);
858	<	assertFalse(sync.hasWaiters(c));
857	>	sync.acquire();
858	>	assertHasWaitersLocked(sync, c, NO_THREADS);
859		assertEquals(0, sync.getWaitQueueLength(c));
860	+	assertTrue(acquired1.releaseShared(0));
861		c.await();
862	<	sync.release(1);
862	>	sync.release();
863		}});
864	+	acquired1.acquireShared(0);
865	+	sync.acquire();
866	+	assertHasWaitersLocked(sync, c, t1);
867	+	assertEquals(1, sync.getWaitQueueLength(c));
868	+	sync.release();
869
870	<	Thread t2 = new Thread(new CheckedRunnable() {
870	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
871		public void realRun() throws InterruptedException {
872	<	sync.acquire(1);
873	<	assertTrue(sync.hasWaiters(c));
872	>	sync.acquire();
873	>	assertHasWaitersLocked(sync, c, t1);
874		assertEquals(1, sync.getWaitQueueLength(c));
875	+	assertTrue(acquired2.releaseShared(0));
876		c.await();
877	<	sync.release(1);
877	>	sync.release();
878		}});
879	<
880	<	t1.start();
881	<	Thread.sleep(SHORT_DELAY_MS);
882	<	t2.start();
696	<	Thread.sleep(SHORT_DELAY_MS);
697	<	sync.acquire(1);
698	<	assertTrue(sync.hasWaiters(c));
879	>	acquired2.acquireShared(0);
880	>	sync.acquire();
881	>	assertHasWaitersLocked(sync, c, t1, t2);
882	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
883		assertEquals(2, sync.getWaitQueueLength(c));
884		c.signalAll();
885	<	sync.release(1);
886	<	Thread.sleep(SHORT_DELAY_MS);
703	<	sync.acquire(1);
704	<	assertFalse(sync.hasWaiters(c));
885	>	assertHasWaitersLocked(sync, c, NO_THREADS);
886	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
887		assertEquals(0, sync.getWaitQueueLength(c));
888	<	sync.release(1);
889	<	t1.join(SHORT_DELAY_MS);
890	<	t2.join(SHORT_DELAY_MS);
891	<	assertFalse(t1.isAlive());
892	<	assertFalse(t2.isAlive());
888	>	sync.release();
889	>
890	>	awaitTermination(t1);
891	>	awaitTermination(t2);
892	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
893		}
894
895		/**
896		* getWaitingThreads returns only and all waiting threads
897		*/
898	<	public void testGetWaitingThreads() throws InterruptedException {
898	>	public void testGetWaitingThreads() {
899		final Mutex sync = new Mutex();
900	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
901	<	Thread t1 = new Thread(new CheckedRunnable() {
900	>	final ConditionObject c = sync.newCondition();
901	>	final BooleanLatch acquired1 = new BooleanLatch();
902	>	final BooleanLatch acquired2 = new BooleanLatch();
903	>	final Thread t1 = new Thread(new CheckedRunnable() {
904		public void realRun() throws InterruptedException {
905	<	sync.acquire(1);
905	>	sync.acquire();
906	>	assertHasWaitersLocked(sync, c, NO_THREADS);
907		assertTrue(sync.getWaitingThreads(c).isEmpty());
908	+	assertTrue(acquired1.releaseShared(0));
909		c.await();
910	<	sync.release(1);
910	>	sync.release();
911		}});
912
913	<	Thread t2 = new Thread(new CheckedRunnable() {
913	>	final Thread t2 = new Thread(new CheckedRunnable() {
914		public void realRun() throws InterruptedException {
915	<	sync.acquire(1);
915	>	sync.acquire();
916	>	assertHasWaitersLocked(sync, c, t1);
917	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
918		assertFalse(sync.getWaitingThreads(c).isEmpty());
919	+	assertEquals(1, sync.getWaitingThreads(c).size());
920	+	assertTrue(acquired2.releaseShared(0));
921		c.await();
922	<	sync.release(1);
922	>	sync.release();
923		}});
924
925	<	sync.acquire(1);
925	>	sync.acquire();
926	>	assertHasWaitersLocked(sync, c, NO_THREADS);
927	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
928	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
929		assertTrue(sync.getWaitingThreads(c).isEmpty());
930	<	sync.release(1);
930	>	assertEquals(0, sync.getWaitingThreads(c).size());
931	>	sync.release();
932	>
933		t1.start();
934	<	Thread.sleep(SHORT_DELAY_MS);
934	>	acquired1.acquireShared(0);
935	>	sync.acquire();
936	>	assertHasWaitersLocked(sync, c, t1);
937	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
938	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
939	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
940	>	assertEquals(1, sync.getWaitingThreads(c).size());
941	>	sync.release();
942	>
943		t2.start();
944	<	Thread.sleep(SHORT_DELAY_MS);
945	<	sync.acquire(1);
946	<	assertTrue(sync.hasWaiters(c));
944	>	acquired2.acquireShared(0);
945	>	sync.acquire();
946	>	assertHasWaitersLocked(sync, c, t1, t2);
947	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
948		assertTrue(sync.getWaitingThreads(c).contains(t1));
949		assertTrue(sync.getWaitingThreads(c).contains(t2));
950	+	assertFalse(sync.getWaitingThreads(c).isEmpty());
951	+	assertEquals(2, sync.getWaitingThreads(c).size());
952		c.signalAll();
953	<	sync.release(1);
954	<	Thread.sleep(SHORT_DELAY_MS);
955	<	sync.acquire(1);
956	<	assertFalse(sync.hasWaiters(c));
953	>	assertHasWaitersLocked(sync, c, NO_THREADS);
954	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
955	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
956	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
957		assertTrue(sync.getWaitingThreads(c).isEmpty());
958	<	sync.release(1);
959	<	t1.join(SHORT_DELAY_MS);
754	<	t2.join(SHORT_DELAY_MS);
755	<	assertFalse(t1.isAlive());
756	<	assertFalse(t2.isAlive());
757	<	}
758	<
759	<
760	<
761	<	/**
762	<	* awaitUninterruptibly doesn't abort on interrupt
763	<	*/
764	<	public void testAwaitUninterruptibly() throws InterruptedException {
765	<	final Mutex sync = new Mutex();
766	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
767	<	Thread t = new Thread(new CheckedRunnable() {
768	<	public void realRun() {
769	<	sync.acquire(1);
770	<	c.awaitUninterruptibly();
771	<	sync.release(1);
772	<	}});
958	>	assertEquals(0, sync.getWaitingThreads(c).size());
959	>	sync.release();
960
961	<	t.start();
962	<	Thread.sleep(SHORT_DELAY_MS);
963	<	t.interrupt();
777	<	sync.acquire(1);
778	<	c.signal();
779	<	sync.release(1);
780	<	t.join(SHORT_DELAY_MS);
781	<	assertFalse(t.isAlive());
961	>	awaitTermination(t1);
962	>	awaitTermination(t2);
963	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
964		}
965
966		/**
967	<	* await is interruptible
967	>	* awaitUninterruptibly is uninterruptible
968		*/
969	<	public void testAwait_Interrupt() throws InterruptedException {
969	>	public void testAwaitUninterruptibly() {
970		final Mutex sync = new Mutex();
971	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
972	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
973	<	public void realRun() throws InterruptedException {
974	<	sync.acquire(1);
975	<	c.await();
976	<	}});
977	<
978	<	t.start();
979	<	Thread.sleep(SHORT_DELAY_MS);
980	<	t.interrupt();
799	<	t.join(SHORT_DELAY_MS);
800	<	assertFalse(t.isAlive());
801	<	}
802	<
803	<	/**
804	<	* awaitNanos is interruptible
805	<	*/
806	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
807	<	final Mutex sync = new Mutex();
808	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
809	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
810	<	public void realRun() throws InterruptedException {
811	<	sync.acquire(1);
812	<	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
971	>	final ConditionObject condition = sync.newCondition();
972	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
973	>	Thread t = newStartedThread(new CheckedRunnable() {
974	>	public void realRun() {
975	>	sync.acquire();
976	>	assertTrue(pleaseInterrupt.releaseShared(0));
977	>	condition.awaitUninterruptibly();
978	>	assertTrue(Thread.interrupted());
979	>	assertHasWaitersLocked(sync, condition, NO_THREADS);
980	>	sync.release();
981		}});
982
983	<	t.start();
984	<	Thread.sleep(SHORT_DELAY_MS);
983	>	pleaseInterrupt.acquireShared(0);
984	>	sync.acquire();
985	>	assertHasWaitersLocked(sync, condition, t);
986	>	sync.release();
987		t.interrupt();
988	<	t.join(SHORT_DELAY_MS);
989	<	assertFalse(t.isAlive());
988	>	assertHasWaitersUnlocked(sync, condition, t);
989	>	assertThreadBlocks(t, Thread.State.WAITING);
990	>	sync.acquire();
991	>	assertHasWaitersLocked(sync, condition, t);
992	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
993	>	condition.signal();
994	>	assertHasWaitersLocked(sync, condition, NO_THREADS);
995	>	assertHasExclusiveQueuedThreads(sync, t);
996	>	sync.release();
997	>	awaitTermination(t);
998		}
999
1000		/**
1001	<	* awaitUntil is interruptible
1002	<	*/
1003	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1004	<	final Mutex sync = new Mutex();
1005	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
1006	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1001	>	* await/awaitNanos/awaitUntil is interruptible
1002	>	*/
1003	>	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
1004	>	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
1005	>	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
1006	>	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
1007	>	public void testInterruptible(final AwaitMethod awaitMethod) {
1008	>	final Mutex sync = new Mutex();
1009	>	final ConditionObject c = sync.newCondition();
1010	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
1011	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1012		public void realRun() throws InterruptedException {
1013	<	sync.acquire(1);
1014	<	java.util.Date d = new java.util.Date();
1015	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1013	>	sync.acquire();
1014	>	assertTrue(pleaseInterrupt.releaseShared(0));
1015	>	await(c, awaitMethod);
1016		}});
1017
1018	<	t.start();
836	<	Thread.sleep(SHORT_DELAY_MS);
1018	>	pleaseInterrupt.acquireShared(0);
1019		t.interrupt();
1020	<	t.join(SHORT_DELAY_MS);
839	<	assertFalse(t.isAlive());
1020	>	awaitTermination(t);
1021		}
1022
1023		/**
1024		* signalAll wakes up all threads
1025		*/
1026	<	public void testSignalAll() throws InterruptedException {
1027	<	final Mutex sync = new Mutex();
1028	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
1029	<	Thread t1 = new Thread(new CheckedRunnable() {
1026	>	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1027	>	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1028	>	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1029	>	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1030	>	public void testSignalAll(final AwaitMethod awaitMethod) {
1031	>	final Mutex sync = new Mutex();
1032	>	final ConditionObject c = sync.newCondition();
1033	>	final BooleanLatch acquired1 = new BooleanLatch();
1034	>	final BooleanLatch acquired2 = new BooleanLatch();
1035	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1036		public void realRun() throws InterruptedException {
1037	<	sync.acquire(1);
1038	<	c.await();
1039	<	sync.release(1);
1037	>	sync.acquire();
1038	>	acquired1.releaseShared(0);
1039	>	await(c, awaitMethod);
1040	>	sync.release();
1041		}});
1042
1043	<	Thread t2 = new Thread(new CheckedRunnable() {
1043	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1044		public void realRun() throws InterruptedException {
1045	<	sync.acquire(1);
1046	<	c.await();
1047	<	sync.release(1);
1045	>	sync.acquire();
1046	>	acquired2.releaseShared(0);
1047	>	await(c, awaitMethod);
1048	>	sync.release();
1049		}});
1050
1051	<	t1.start();
1052	<	t2.start();
1053	<	Thread.sleep(SHORT_DELAY_MS);
1054	<	sync.acquire(1);
1051	>	acquired1.acquireShared(0);
1052	>	acquired2.acquireShared(0);
1053	>	sync.acquire();
1054	>	assertHasWaitersLocked(sync, c, t1, t2);
1055	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1056		c.signalAll();
1057	<	sync.release(1);
1058	<	t1.join(SHORT_DELAY_MS);
1059	<	t2.join(SHORT_DELAY_MS);
1060	<	assertFalse(t1.isAlive());
1061	<	assertFalse(t2.isAlive());
1057	>	assertHasWaitersLocked(sync, c, NO_THREADS);
1058	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
1059	>	sync.release();
1060	>	awaitTermination(t1);
1061	>	awaitTermination(t2);
1062		}
1063
874	–
1064		/**
1065		* toString indicates current state
1066		*/
1067		public void testToString() {
1068		Mutex sync = new Mutex();
1069	<	String us = sync.toString();
1070	<	assertTrue(us.indexOf("State = 0") >= 0);
1071	<	sync.acquire(1);
883	<	String ls = sync.toString();
884	<	assertTrue(ls.indexOf("State = 1") >= 0);
1069	>	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1070	>	sync.acquire();
1071	>	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1072		}
1073
1074		/**
1075	<	* A serialized AQS deserializes with current state
1076	<	*/
1077	<	public void testSerialization() throws Exception {
1078	<	Mutex l = new Mutex();
1079	<	l.acquire(1);
1080	<	assertTrue(l.isHeldExclusively());
1081	<
1082	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1083	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
897	<	out.writeObject(l);
898	<	out.close();
899	<
900	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
901	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
902	<	Mutex r = (Mutex) in.readObject();
903	<	assertTrue(r.isHeldExclusively());
904	<	}
1075	>	* A serialized AQS deserializes with current state, but no queued threads
1076	>	*/
1077	>	public void testSerialization() {
1078	>	Mutex sync = new Mutex();
1079	>	assertFalse(serialClone(sync).isHeldExclusively());
1080	>	sync.acquire();
1081	>	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1082	>	waitForQueuedThread(sync, t);
1083	>	assertTrue(sync.isHeldExclusively());
1084
1085	+	Mutex clone = serialClone(sync);
1086	+	assertTrue(clone.isHeldExclusively());
1087	+	assertHasExclusiveQueuedThreads(sync, t);
1088	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1089	+	t.interrupt();
1090	+	awaitTermination(t);
1091	+	sync.release();
1092	+	assertFalse(sync.isHeldExclusively());
1093	+	assertTrue(clone.isHeldExclusively());
1094	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1095	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1096	+	}
1097
1098		/**
1099		* tryReleaseShared setting state changes getState
#	Line 910 | Line 1101 | public class AbstractQueuedSynchronizerT
1101		public void testGetStateWithReleaseShared() {
1102		final BooleanLatch l = new BooleanLatch();
1103		assertFalse(l.isSignalled());
1104	<	l.releaseShared(0);
1104	>	assertTrue(l.releaseShared(0));
1105		assertTrue(l.isSignalled());
1106		}
1107
#	Line 920 | Line 1111 | public class AbstractQueuedSynchronizerT
1111		public void testReleaseShared() {
1112		final BooleanLatch l = new BooleanLatch();
1113		assertFalse(l.isSignalled());
1114	<	l.releaseShared(0);
1114	>	assertTrue(l.releaseShared(0));
1115		assertTrue(l.isSignalled());
1116	<	l.releaseShared(0);
1116	>	assertTrue(l.releaseShared(0));
1117		assertTrue(l.isSignalled());
1118		}
1119
1120		/**
1121		* acquireSharedInterruptibly returns after release, but not before
1122		*/
1123	<	public void testAcquireSharedInterruptibly() throws InterruptedException {
1123	>	public void testAcquireSharedInterruptibly() {
1124		final BooleanLatch l = new BooleanLatch();
1125
1126	<	Thread t = new Thread(new CheckedRunnable() {
1126	>	Thread t = newStartedThread(new CheckedRunnable() {
1127		public void realRun() throws InterruptedException {
1128		assertFalse(l.isSignalled());
1129		l.acquireSharedInterruptibly(0);
1130		assertTrue(l.isSignalled());
1131	+	l.acquireSharedInterruptibly(0);
1132	+	assertTrue(l.isSignalled());
1133		}});
1134
1135	<	t.start();
1135	>	waitForQueuedThread(l, t);
1136		assertFalse(l.isSignalled());
1137	<	Thread.sleep(SHORT_DELAY_MS);
1138	<	l.releaseShared(0);
1137	>	assertThreadStaysAlive(t);
1138	>	assertHasSharedQueuedThreads(l, t);
1139	>	assertTrue(l.releaseShared(0));
1140		assertTrue(l.isSignalled());
1141	<	t.join();
1141	>	awaitTermination(t);
1142		}
1143
950	–
1144		/**
1145	<	* acquireSharedTimed returns after release
1145	>	* tryAcquireSharedNanos returns after release, but not before
1146		*/
1147	<	public void testAsquireSharedTimed() throws InterruptedException {
1147	>	public void testTryAcquireSharedNanos() {
1148		final BooleanLatch l = new BooleanLatch();
1149
1150	<	Thread t = new Thread(new CheckedRunnable() {
1150	>	Thread t = newStartedThread(new CheckedRunnable() {
1151		public void realRun() throws InterruptedException {
1152		assertFalse(l.isSignalled());
1153	<	long nanos = MILLISECONDS.toNanos(MEDIUM_DELAY_MS);
1153	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1154	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1155	>	assertTrue(l.isSignalled());
1156		assertTrue(l.tryAcquireSharedNanos(0, nanos));
1157		assertTrue(l.isSignalled());
1158		}});
1159
1160	<	t.start();
1160	>	waitForQueuedThread(l, t);
1161		assertFalse(l.isSignalled());
1162	<	Thread.sleep(SHORT_DELAY_MS);
1163	<	l.releaseShared(0);
1162	>	assertThreadStaysAlive(t);
1163	>	assertTrue(l.releaseShared(0));
1164		assertTrue(l.isSignalled());
1165	<	t.join();
1165	>	awaitTermination(t);
1166		}
1167
1168		/**
1169	<	* acquireSharedInterruptibly throws IE if interrupted before released
1169	>	* acquireSharedInterruptibly is interruptible
1170		*/
1171	<	public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException {
1171	>	public void testAcquireSharedInterruptibly_Interruptible() {
1172		final BooleanLatch l = new BooleanLatch();
1173	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1173	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1174		public void realRun() throws InterruptedException {
1175		assertFalse(l.isSignalled());
1176		l.acquireSharedInterruptibly(0);
1177		}});
1178
1179	<	t.start();
1179	>	waitForQueuedThread(l, t);
1180		assertFalse(l.isSignalled());
1181		t.interrupt();
1182	<	t.join();
1182	>	awaitTermination(t);
1183	>	assertFalse(l.isSignalled());
1184		}
1185
1186		/**
1187	<	* acquireSharedTimed throws IE if interrupted before released
1187	>	* tryAcquireSharedNanos is interruptible
1188		*/
1189	<	public void testAcquireSharedNanos_InterruptedException() throws InterruptedException {
1189	>	public void testTryAcquireSharedNanos_Interruptible() {
1190		final BooleanLatch l = new BooleanLatch();
1191	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1191	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1192		public void realRun() throws InterruptedException {
1193		assertFalse(l.isSignalled());
1194	<	long nanos = MILLISECONDS.toNanos(SMALL_DELAY_MS);
1194	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1195		l.tryAcquireSharedNanos(0, nanos);
1196		}});
1197
1198	<	t.start();
1003	<	Thread.sleep(SHORT_DELAY_MS);
1198	>	waitForQueuedThread(l, t);
1199		assertFalse(l.isSignalled());
1200		t.interrupt();
1201	<	t.join();
1201	>	awaitTermination(t);
1202	>	assertFalse(l.isSignalled());
1203		}
1204
1205		/**
1206	<	* acquireSharedTimed times out if not released before timeout
1206	>	* tryAcquireSharedNanos times out if not released before timeout
1207		*/
1208	<	public void testAcquireSharedNanos_Timeout() throws InterruptedException {
1208	>	public void testTryAcquireSharedNanos_Timeout() {
1209		final BooleanLatch l = new BooleanLatch();
1210	<	Thread t = new Thread(new CheckedRunnable() {
1210	>	final BooleanLatch observedQueued = new BooleanLatch();
1211	>	Thread t = newStartedThread(new CheckedRunnable() {
1212		public void realRun() throws InterruptedException {
1213		assertFalse(l.isSignalled());
1214	<	long nanos = MILLISECONDS.toNanos(SMALL_DELAY_MS);
1215	<	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1214	>	for (long millis = timeoutMillis();
1215	>	!observedQueued.isSignalled();
1216	>	millis *= 2) {
1217	>	long nanos = MILLISECONDS.toNanos(millis);
1218	>	long startTime = System.nanoTime();
1219	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1220	>	assertTrue(millisElapsedSince(startTime) >= millis);
1221	>	}
1222	>	assertFalse(l.isSignalled());
1223		}});
1224
1225	<	t.start();
1226	<	Thread.sleep(SHORT_DELAY_MS);
1225	>	waitForQueuedThread(l, t);
1226	>	observedQueued.releaseShared(0);
1227		assertFalse(l.isSignalled());
1228	<	t.join();
1228	>	awaitTermination(t);
1229	>	assertFalse(l.isSignalled());
1230	>	}
1231	>
1232	>	/**
1233	>	* awaitNanos/timed await with 0 wait times out immediately
1234	>	*/
1235	>	public void testAwait_Zero() throws InterruptedException {
1236	>	final Mutex sync = new Mutex();
1237	>	final ConditionObject c = sync.newCondition();
1238	>	sync.acquire();
1239	>	assertTrue(c.awaitNanos(0L) <= 0);
1240	>	assertFalse(c.await(0L, NANOSECONDS));
1241	>	sync.release();
1242	>	}
1243	>
1244	>	/**
1245	>	* awaitNanos/timed await with maximum negative wait times does not underflow
1246	>	*/
1247	>	public void testAwait_NegativeInfinity() throws InterruptedException {
1248	>	final Mutex sync = new Mutex();
1249	>	final ConditionObject c = sync.newCondition();
1250	>	sync.acquire();
1251	>	assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
1252	>	assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
1253	>	sync.release();
1254		}
1255
1256		}

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