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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.30 by jsr166, Sat Nov 21 02:33:20 2009 UTC vs.
Revision 1.47 by jsr166, Wed Dec 31 19:05:42 2014 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	>	junit.textui.TestRunner.run(suite());
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	<	assertTrue(acquires == 1);
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() { 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 56 | 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 71 | 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
80	–
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		}
232		}
233
234		/**
235	+	* Checks that awaiting the given condition times out (using the
236	+	* default timeout duration).
237	+	*/
238	+	void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
239	+	long timeoutMillis = timeoutMillis();
240	+	long startTime = System.nanoTime();
241	+	try {
242	+	switch (awaitMethod) {
243	+	case awaitTimed:
244	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
245	+	break;
246	+	case awaitNanos:
247	+	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
248	+	long nanosRemaining = c.awaitNanos(nanosTimeout);
249	+	assertTrue(nanosRemaining <= 0);
250	+	break;
251	+	case awaitUntil:
252	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
253	+	break;
254	+	default:
255	+	throw new UnsupportedOperationException();
256	+	}
257	+	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
258	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
259	+	}
260	+
261	+	/**
262		* isHeldExclusively is false upon construction
263		*/
264		public void testIsHeldExclusively() {
265	<	Mutex rl = new Mutex();
266	<	assertFalse(rl.isHeldExclusively());
265	>	Mutex sync = new Mutex();
266	>	assertFalse(sync.isHeldExclusively());
267		}
268
269		/**
270		* acquiring released sync succeeds
271		*/
272		public void testAcquire() {
273	<	Mutex rl = new Mutex();
274	<	rl.acquire(1);
275	<	assertTrue(rl.isHeldExclusively());
276	<	rl.release(1);
277	<	assertFalse(rl.isHeldExclusively());
273	>	Mutex sync = new Mutex();
274	>	sync.acquire();
275	>	assertTrue(sync.isHeldExclusively());
276	>	sync.release();
277	>	assertFalse(sync.isHeldExclusively());
278		}
279
280		/**
281	<	* tryAcquire on an released sync succeeds
281	>	* tryAcquire on a released sync succeeds
282		*/
283		public void testTryAcquire() {
284	<	Mutex rl = new Mutex();
285	<	assertTrue(rl.tryAcquire(1));
286	<	assertTrue(rl.isHeldExclusively());
287	<	rl.release(1);
284	>	Mutex sync = new Mutex();
285	>	assertTrue(sync.tryAcquire());
286	>	assertTrue(sync.isHeldExclusively());
287	>	sync.release();
288	>	assertFalse(sync.isHeldExclusively());
289		}
290
291		/**
292		* hasQueuedThreads reports whether there are waiting threads
293		*/
294	<	public void testhasQueuedThreads() throws InterruptedException {
294	>	public void testHasQueuedThreads() {
295		final Mutex sync = new Mutex();
127	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
128	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
296		assertFalse(sync.hasQueuedThreads());
297	<	sync.acquire(1);
298	<	t1.start();
299	<	Thread.sleep(SHORT_DELAY_MS);
297	>	sync.acquire();
298	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
299	>	waitForQueuedThread(sync, t1);
300		assertTrue(sync.hasQueuedThreads());
301	<	t2.start();
302	<	Thread.sleep(SHORT_DELAY_MS);
301	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
302	>	waitForQueuedThread(sync, t2);
303		assertTrue(sync.hasQueuedThreads());
304		t1.interrupt();
305	<	Thread.sleep(SHORT_DELAY_MS);
305	>	awaitTermination(t1);
306		assertTrue(sync.hasQueuedThreads());
307	<	sync.release(1);
308	<	Thread.sleep(SHORT_DELAY_MS);
307	>	sync.release();
308	>	awaitTermination(t2);
309		assertFalse(sync.hasQueuedThreads());
143	–	t1.join();
144	–	t2.join();
310		}
311
312		/**
313	<	* isQueued(null) throws NPE
313	>	* isQueued(null) throws NullPointerException
314		*/
315		public void testIsQueuedNPE() {
316		final Mutex sync = new Mutex();
#	Line 156 | Line 321 | public class AbstractQueuedSynchronizerT
321		}
322
323		/**
324	<	* isQueued reports whether a thread is queued.
324	>	* isQueued reports whether a thread is queued
325		*/
326	<	public void testIsQueued() throws InterruptedException {
326	>	public void testIsQueued() {
327		final Mutex sync = new Mutex();
328		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
329		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
330		assertFalse(sync.isQueued(t1));
331		assertFalse(sync.isQueued(t2));
332	<	sync.acquire(1);
332	>	sync.acquire();
333		t1.start();
334	<	Thread.sleep(SHORT_DELAY_MS);
334	>	waitForQueuedThread(sync, t1);
335		assertTrue(sync.isQueued(t1));
336	+	assertFalse(sync.isQueued(t2));
337		t2.start();
338	<	Thread.sleep(SHORT_DELAY_MS);
338	>	waitForQueuedThread(sync, t2);
339		assertTrue(sync.isQueued(t1));
340		assertTrue(sync.isQueued(t2));
341		t1.interrupt();
342	<	Thread.sleep(SHORT_DELAY_MS);
342	>	awaitTermination(t1);
343		assertFalse(sync.isQueued(t1));
344		assertTrue(sync.isQueued(t2));
345	<	sync.release(1);
346	<	Thread.sleep(SHORT_DELAY_MS);
345	>	sync.release();
346	>	awaitTermination(t2);
347		assertFalse(sync.isQueued(t1));
182	–	Thread.sleep(SHORT_DELAY_MS);
348		assertFalse(sync.isQueued(t2));
184	–	t1.join();
185	–	t2.join();
349		}
350
351		/**
352		* getFirstQueuedThread returns first waiting thread or null if none
353		*/
354	<	public void testGetFirstQueuedThread() throws InterruptedException {
354	>	public void testGetFirstQueuedThread() {
355		final Mutex sync = new Mutex();
193	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
194	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
356		assertNull(sync.getFirstQueuedThread());
357	<	sync.acquire(1);
358	<	t1.start();
359	<	Thread.sleep(SHORT_DELAY_MS);
357	>	sync.acquire();
358	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
359	>	waitForQueuedThread(sync, t1);
360		assertEquals(t1, sync.getFirstQueuedThread());
361	<	t2.start();
362	<	Thread.sleep(SHORT_DELAY_MS);
361	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
362	>	waitForQueuedThread(sync, t2);
363		assertEquals(t1, sync.getFirstQueuedThread());
364		t1.interrupt();
365	<	Thread.sleep(SHORT_DELAY_MS);
205	<	Thread.sleep(SHORT_DELAY_MS);
365	>	awaitTermination(t1);
366		assertEquals(t2, sync.getFirstQueuedThread());
367	<	sync.release(1);
368	<	Thread.sleep(SHORT_DELAY_MS);
367	>	sync.release();
368	>	awaitTermination(t2);
369		assertNull(sync.getFirstQueuedThread());
210	–	t1.join();
211	–	t2.join();
370		}
371
214	–
372		/**
373		* hasContended reports false if no thread has ever blocked, else true
374		*/
375	<	public void testHasContended() throws InterruptedException {
375	>	public void testHasContended() {
376		final Mutex sync = new Mutex();
220	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
221	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
377		assertFalse(sync.hasContended());
378	<	sync.acquire(1);
379	<	t1.start();
380	<	Thread.sleep(SHORT_DELAY_MS);
378	>	sync.acquire();
379	>	assertFalse(sync.hasContended());
380	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
381	>	waitForQueuedThread(sync, t1);
382		assertTrue(sync.hasContended());
383	<	t2.start();
384	<	Thread.sleep(SHORT_DELAY_MS);
383	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
384	>	waitForQueuedThread(sync, t2);
385		assertTrue(sync.hasContended());
386		t1.interrupt();
387	<	Thread.sleep(SHORT_DELAY_MS);
387	>	awaitTermination(t1);
388		assertTrue(sync.hasContended());
389	<	sync.release(1);
390	<	Thread.sleep(SHORT_DELAY_MS);
389	>	sync.release();
390	>	awaitTermination(t2);
391		assertTrue(sync.hasContended());
236	–	t1.join();
237	–	t2.join();
392		}
393
394		/**
395	<	* getQueuedThreads includes waiting threads
395	>	* getQueuedThreads returns all waiting threads
396		*/
397	<	public void testGetQueuedThreads() throws InterruptedException {
397	>	public void testGetQueuedThreads() {
398		final Mutex sync = new Mutex();
399		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
400		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
401	<	assertTrue(sync.getQueuedThreads().isEmpty());
402	<	sync.acquire(1);
403	<	assertTrue(sync.getQueuedThreads().isEmpty());
401	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
402	>	sync.acquire();
403	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
404		t1.start();
405	<	Thread.sleep(SHORT_DELAY_MS);
405	>	waitForQueuedThread(sync, t1);
406	>	assertHasExclusiveQueuedThreads(sync, t1);
407		assertTrue(sync.getQueuedThreads().contains(t1));
408	+	assertFalse(sync.getQueuedThreads().contains(t2));
409		t2.start();
410	<	Thread.sleep(SHORT_DELAY_MS);
410	>	waitForQueuedThread(sync, t2);
411	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
412		assertTrue(sync.getQueuedThreads().contains(t1));
413		assertTrue(sync.getQueuedThreads().contains(t2));
414		t1.interrupt();
415	<	Thread.sleep(SHORT_DELAY_MS);
416	<	assertFalse(sync.getQueuedThreads().contains(t1));
417	<	assertTrue(sync.getQueuedThreads().contains(t2));
418	<	sync.release(1);
419	<	Thread.sleep(SHORT_DELAY_MS);
263	<	assertTrue(sync.getQueuedThreads().isEmpty());
264	<	t1.join();
265	<	t2.join();
415	>	awaitTermination(t1);
416	>	assertHasExclusiveQueuedThreads(sync, t2);
417	>	sync.release();
418	>	awaitTermination(t2);
419	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
420		}
421
422		/**
423	<	* getExclusiveQueuedThreads includes waiting threads
423	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
424		*/
425	<	public void testGetExclusiveQueuedThreads() throws InterruptedException {
425	>	public void testGetExclusiveQueuedThreads() {
426		final Mutex sync = new Mutex();
427		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
428		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
429	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
430	<	sync.acquire(1);
431	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
429	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
430	>	sync.acquire();
431	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
432		t1.start();
433	<	Thread.sleep(SHORT_DELAY_MS);
433	>	waitForQueuedThread(sync, t1);
434	>	assertHasExclusiveQueuedThreads(sync, t1);
435		assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
436	+	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
437		t2.start();
438	<	Thread.sleep(SHORT_DELAY_MS);
438	>	waitForQueuedThread(sync, t2);
439	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
440		assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
441		assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
442		t1.interrupt();
443	<	Thread.sleep(SHORT_DELAY_MS);
444	<	assertFalse(sync.getExclusiveQueuedThreads().contains(t1));
445	<	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
446	<	sync.release(1);
447	<	Thread.sleep(SHORT_DELAY_MS);
291	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
292	<	t1.join();
293	<	t2.join();
443	>	awaitTermination(t1);
444	>	assertHasExclusiveQueuedThreads(sync, t2);
445	>	sync.release();
446	>	awaitTermination(t2);
447	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
448		}
449
450		/**
451		* getSharedQueuedThreads does not include exclusively waiting threads
452		*/
453	<	public void testGetSharedQueuedThreads() throws InterruptedException {
453	>	public void testGetSharedQueuedThreads_Exclusive() {
454		final Mutex sync = new Mutex();
301	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
302	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
455		assertTrue(sync.getSharedQueuedThreads().isEmpty());
456	<	sync.acquire(1);
456	>	sync.acquire();
457		assertTrue(sync.getSharedQueuedThreads().isEmpty());
458	<	t1.start();
459	<	Thread.sleep(SHORT_DELAY_MS);
458	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
459	>	waitForQueuedThread(sync, t1);
460		assertTrue(sync.getSharedQueuedThreads().isEmpty());
461	<	t2.start();
462	<	Thread.sleep(SHORT_DELAY_MS);
461	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
462	>	waitForQueuedThread(sync, t2);
463		assertTrue(sync.getSharedQueuedThreads().isEmpty());
464		t1.interrupt();
465	<	Thread.sleep(SHORT_DELAY_MS);
465	>	awaitTermination(t1);
466		assertTrue(sync.getSharedQueuedThreads().isEmpty());
467	<	sync.release(1);
468	<	Thread.sleep(SHORT_DELAY_MS);
467	>	sync.release();
468	>	awaitTermination(t2);
469		assertTrue(sync.getSharedQueuedThreads().isEmpty());
318	–	t1.join();
319	–	t2.join();
470		}
471
472		/**
473	<	* tryAcquireNanos is interruptible.
473	>	* getSharedQueuedThreads returns all shared waiting threads
474	>	*/
475	>	public void testGetSharedQueuedThreads_Shared() {
476	>	final BooleanLatch l = new BooleanLatch();
477	>	assertHasSharedQueuedThreads(l, NO_THREADS);
478	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
479	>	public void realRun() throws InterruptedException {
480	>	l.acquireSharedInterruptibly(0);
481	>	}});
482	>	waitForQueuedThread(l, t1);
483	>	assertHasSharedQueuedThreads(l, t1);
484	>	Thread t2 = newStartedThread(new CheckedRunnable() {
485	>	public void realRun() throws InterruptedException {
486	>	l.acquireSharedInterruptibly(0);
487	>	}});
488	>	waitForQueuedThread(l, t2);
489	>	assertHasSharedQueuedThreads(l, t1, t2);
490	>	t1.interrupt();
491	>	awaitTermination(t1);
492	>	assertHasSharedQueuedThreads(l, t2);
493	>	assertTrue(l.releaseShared(0));
494	>	awaitTermination(t2);
495	>	assertHasSharedQueuedThreads(l, NO_THREADS);
496	>	}
497	>
498	>	/**
499	>	* tryAcquireNanos is interruptible
500		*/
501	<	public void testInterruptedException2() throws InterruptedException {
501	>	public void testTryAcquireNanos_Interruptible() {
502		final Mutex sync = new Mutex();
503	<	sync.acquire(1);
504	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
503	>	sync.acquire();
504	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
505		public void realRun() throws InterruptedException {
506	<	sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000 * 1000);
506	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
507		}});
508
509	<	t.start();
509	>	waitForQueuedThread(sync, t);
510		t.interrupt();
511	<	t.join();
511	>	awaitTermination(t);
512		}
513
338	–
514		/**
515	<	* TryAcquire on exclusively held sync fails
515	>	* tryAcquire on exclusively held sync fails
516		*/
517	<	public void testTryAcquireWhenSynced() throws InterruptedException {
517	>	public void testTryAcquireWhenSynced() {
518		final Mutex sync = new Mutex();
519	<	sync.acquire(1);
520	<	Thread t = new Thread(new CheckedRunnable() {
519	>	sync.acquire();
520	>	Thread t = newStartedThread(new CheckedRunnable() {
521		public void realRun() {
522	<	threadAssertFalse(sync.tryAcquire(1));
522	>	assertFalse(sync.tryAcquire());
523		}});
524
525	<	t.start();
526	<	t.join();
352	<	sync.release(1);
525	>	awaitTermination(t);
526	>	sync.release();
527		}
528
529		/**
530		* tryAcquireNanos on an exclusively held sync times out
531		*/
532	<	public void testAcquireNanos_Timeout() throws InterruptedException {
532	>	public void testAcquireNanos_Timeout() {
533		final Mutex sync = new Mutex();
534	<	sync.acquire(1);
535	<	Thread t = new Thread(new CheckedRunnable() {
534	>	sync.acquire();
535	>	Thread t = newStartedThread(new CheckedRunnable() {
536		public void realRun() throws InterruptedException {
537	<	threadAssertFalse(sync.tryAcquireNanos(1, 1000 * 1000));
537	>	long startTime = System.nanoTime();
538	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
539	>	assertFalse(sync.tryAcquireNanos(nanos));
540	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
541		}});
542
543	<	t.start();
544	<	t.join();
368	<	sync.release(1);
543	>	awaitTermination(t);
544	>	sync.release();
545		}
546
371	–
547		/**
548		* getState is true when acquired and false when not
549		*/
550	<	public void testGetState() throws InterruptedException {
550	>	public void testGetState() {
551		final Mutex sync = new Mutex();
552	<	sync.acquire(1);
552	>	sync.acquire();
553		assertTrue(sync.isHeldExclusively());
554	<	sync.release(1);
554	>	sync.release();
555		assertFalse(sync.isHeldExclusively());
556	<	Thread t = new Thread(new CheckedRunnable() {
556	>
557	>	final BooleanLatch acquired = new BooleanLatch();
558	>	final BooleanLatch done = new BooleanLatch();
559	>	Thread t = newStartedThread(new CheckedRunnable() {
560		public void realRun() throws InterruptedException {
561	<	sync.acquire(1);
562	<	Thread.sleep(SMALL_DELAY_MS);
563	<	sync.release(1);
561	>	sync.acquire();
562	>	assertTrue(acquired.releaseShared(0));
563	>	done.acquireShared(0);
564	>	sync.release();
565		}});
566
567	<	t.start();
389	<	Thread.sleep(SHORT_DELAY_MS);
567	>	acquired.acquireShared(0);
568		assertTrue(sync.isHeldExclusively());
569	<	t.join();
569	>	assertTrue(done.releaseShared(0));
570	>	awaitTermination(t);
571		assertFalse(sync.isHeldExclusively());
572		}
573
395	–
396	–	/**
397	–	* acquireInterruptibly is interruptible.
398	–	*/
399	–	public void testAcquireInterruptibly1() throws InterruptedException {
400	–	final Mutex sync = new Mutex();
401	–	sync.acquire(1);
402	–	Thread t = new Thread(new InterruptedSyncRunnable(sync));
403	–
404	–	t.start();
405	–	Thread.sleep(SHORT_DELAY_MS);
406	–	t.interrupt();
407	–	Thread.sleep(SHORT_DELAY_MS);
408	–	sync.release(1);
409	–	t.join();
410	–	}
411	–
574		/**
575		* acquireInterruptibly succeeds when released, else is interruptible
576		*/
577	<	public void testAcquireInterruptibly2() throws InterruptedException {
577	>	public void testAcquireInterruptibly() throws InterruptedException {
578		final Mutex sync = new Mutex();
579	<	sync.acquireInterruptibly(1);
580	<	Thread t = new Thread(new InterruptedSyncRunnable(sync));
581	<	t.start();
579	>	final BooleanLatch threadStarted = new BooleanLatch();
580	>	sync.acquireInterruptibly();
581	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
582	>	public void realRun() throws InterruptedException {
583	>	assertTrue(threadStarted.releaseShared(0));
584	>	sync.acquireInterruptibly();
585	>	}});
586	>
587	>	threadStarted.acquireShared(0);
588	>	waitForQueuedThread(sync, t);
589		t.interrupt();
590	+	awaitTermination(t);
591		assertTrue(sync.isHeldExclusively());
422	–	t.join();
592		}
593
594		/**
#	Line 427 | Line 596 | public class AbstractQueuedSynchronizerT
596		*/
597		public void testOwns() {
598		final Mutex sync = new Mutex();
599	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
599	>	final ConditionObject c = sync.newCondition();
600		final Mutex sync2 = new Mutex();
601		assertTrue(sync.owns(c));
602		assertFalse(sync2.owns(c));
#	Line 436 | Line 605 | public class AbstractQueuedSynchronizerT
605		/**
606		* Calling await without holding sync throws IllegalMonitorStateException
607		*/
608	<	public void testAwait_IllegalMonitor() throws InterruptedException {
608	>	public void testAwait_IMSE() {
609		final Mutex sync = new Mutex();
610	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
611	<	try {
612	<	c.await();
613	<	shouldThrow();
614	<	} catch (IllegalMonitorStateException success) {}
610	>	final ConditionObject c = sync.newCondition();
611	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
612	>	long startTime = System.nanoTime();
613	>	try {
614	>	await(c, awaitMethod);
615	>	shouldThrow();
616	>	} catch (IllegalMonitorStateException success) {
617	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
618	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
619	>	}
620		}
621
622		/**
623		* Calling signal without holding sync throws IllegalMonitorStateException
624		*/
625	<	public void testSignal_IllegalMonitor() {
625	>	public void testSignal_IMSE() {
626		final Mutex sync = new Mutex();
627	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
627	>	final ConditionObject c = sync.newCondition();
628		try {
629		c.signal();
630		shouldThrow();
631		} catch (IllegalMonitorStateException success) {}
632	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
633		}
634
635		/**
636	<	* awaitNanos without a signal times out
636	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
637		*/
638	<	public void testAwaitNanos_Timeout() throws InterruptedException {
638	>	public void testSignalAll_IMSE() {
639		final Mutex sync = new Mutex();
640	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
641	<	sync.acquire(1);
642	<	long t = c.awaitNanos(100);
643	<	assertTrue(t <= 0);
644	<	sync.release(1);
470	<	}
471	<
472	<	/**
473	<	*  Timed await without a signal times out
474	<	*/
475	<	public void testAwait_Timeout() throws InterruptedException {
476	<	final Mutex sync = new Mutex();
477	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
478	<	sync.acquire(1);
479	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
480	<	sync.release(1);
640	>	final ConditionObject c = sync.newCondition();
641	>	try {
642	>	c.signalAll();
643	>	shouldThrow();
644	>	} catch (IllegalMonitorStateException success) {}
645		}
646
647		/**
648	<	* awaitUntil without a signal times out
648	>	* await/awaitNanos/awaitUntil without a signal times out
649		*/
650	<	public void testAwaitUntil_Timeout() throws InterruptedException {
650	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
651	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
652	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
653	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
654		final Mutex sync = new Mutex();
655	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
656	<	sync.acquire(1);
657	<	java.util.Date d = new java.util.Date();
658	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
492	<	sync.release(1);
655	>	final ConditionObject c = sync.newCondition();
656	>	sync.acquire();
657	>	assertAwaitTimesOut(c, awaitMethod);
658	>	sync.release();
659		}
660
661		/**
662	<	* await returns when signalled
662	>	* await/awaitNanos/awaitUntil returns when signalled
663		*/
664	<	public void testAwait() throws InterruptedException {
664	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
665	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
666	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
667	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
668	>	public void testSignal(final AwaitMethod awaitMethod) {
669		final Mutex sync = new Mutex();
670	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
671	<	Thread t = new Thread(new CheckedRunnable() {
670	>	final ConditionObject c = sync.newCondition();
671	>	final BooleanLatch acquired = new BooleanLatch();
672	>	Thread t = newStartedThread(new CheckedRunnable() {
673		public void realRun() throws InterruptedException {
674	<	sync.acquire(1);
675	<	c.await();
676	<	sync.release(1);
674	>	sync.acquire();
675	>	assertTrue(acquired.releaseShared(0));
676	>	await(c, awaitMethod);
677	>	sync.release();
678		}});
679
680	<	t.start();
681	<	Thread.sleep(SHORT_DELAY_MS);
682	<	sync.acquire(1);
680	>	acquired.acquireShared(0);
681	>	sync.acquire();
682	>	assertHasWaitersLocked(sync, c, t);
683	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
684		c.signal();
685	<	sync.release(1);
686	<	t.join(SHORT_DELAY_MS);
687	<	assertFalse(t.isAlive());
685	>	assertHasWaitersLocked(sync, c, NO_THREADS);
686	>	assertHasExclusiveQueuedThreads(sync, t);
687	>	sync.release();
688	>	awaitTermination(t);
689		}
690
517	–
518	–
691		/**
692	<	* hasWaiters throws NPE if null
692	>	* hasWaiters(null) throws NullPointerException
693		*/
694		public void testHasWaitersNPE() {
695		final Mutex sync = new Mutex();
#	Line 528 | Line 700 | public class AbstractQueuedSynchronizerT
700		}
701
702		/**
703	<	* getWaitQueueLength throws NPE if null
703	>	* getWaitQueueLength(null) throws NullPointerException
704		*/
705		public void testGetWaitQueueLengthNPE() {
706		final Mutex sync = new Mutex();
#	Line 538 | Line 710 | public class AbstractQueuedSynchronizerT
710		} catch (NullPointerException success) {}
711		}
712
541	–
713		/**
714	<	* getWaitingThreads throws NPE if null
714	>	* getWaitingThreads(null) throws NullPointerException
715		*/
716		public void testGetWaitingThreadsNPE() {
717		final Mutex sync = new Mutex();
#	Line 550 | Line 721 | public class AbstractQueuedSynchronizerT
721		} catch (NullPointerException success) {}
722		}
723
553	–
724		/**
725	<	* hasWaiters throws IAE if not owned
725	>	* hasWaiters throws IllegalArgumentException if not owned
726		*/
727		public void testHasWaitersIAE() {
728		final Mutex sync = new Mutex();
729	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
729	>	final ConditionObject c = sync.newCondition();
730		final Mutex sync2 = new Mutex();
731		try {
732		sync2.hasWaiters(c);
733		shouldThrow();
734		} catch (IllegalArgumentException success) {}
735	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
736		}
737
738		/**
739	<	* hasWaiters throws IMSE if not synced
739	>	* hasWaiters throws IllegalMonitorStateException if not synced
740		*/
741		public void testHasWaitersIMSE() {
742		final Mutex sync = new Mutex();
743	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
743	>	final ConditionObject c = sync.newCondition();
744		try {
745		sync.hasWaiters(c);
746		shouldThrow();
747		} catch (IllegalMonitorStateException success) {}
748	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
749		}
750
579	–
751		/**
752	<	* getWaitQueueLength throws IAE if not owned
752	>	* getWaitQueueLength throws IllegalArgumentException if not owned
753		*/
754		public void testGetWaitQueueLengthIAE() {
755		final Mutex sync = new Mutex();
756	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
756	>	final ConditionObject c = sync.newCondition();
757		final Mutex sync2 = new Mutex();
758		try {
759		sync2.getWaitQueueLength(c);
760		shouldThrow();
761		} catch (IllegalArgumentException success) {}
762	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
763		}
764
765		/**
766	<	* getWaitQueueLength throws IMSE if not synced
766	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
767		*/
768		public void testGetWaitQueueLengthIMSE() {
769		final Mutex sync = new Mutex();
770	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
770	>	final ConditionObject c = sync.newCondition();
771		try {
772		sync.getWaitQueueLength(c);
773		shouldThrow();
774		} catch (IllegalMonitorStateException success) {}
775	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
776		}
777
605	–
778		/**
779	<	* getWaitingThreads throws IAE if not owned
779	>	* getWaitingThreads throws IllegalArgumentException if not owned
780		*/
781		public void testGetWaitingThreadsIAE() {
782		final Mutex sync = new Mutex();
783	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
783	>	final ConditionObject c = sync.newCondition();
784		final Mutex sync2 = new Mutex();
785		try {
786		sync2.getWaitingThreads(c);
787		shouldThrow();
788		} catch (IllegalArgumentException success) {}
789	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
790		}
791
792		/**
793	<	* getWaitingThreads throws IMSE if not synced
793	>	* getWaitingThreads throws IllegalMonitorStateException if not synced
794		*/
795		public void testGetWaitingThreadsIMSE() {
796		final Mutex sync = new Mutex();
797	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
797	>	final ConditionObject c = sync.newCondition();
798		try {
799		sync.getWaitingThreads(c);
800		shouldThrow();
801		} catch (IllegalMonitorStateException success) {}
802	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
803		}
804
631	–
632	–
805		/**
806		* hasWaiters returns true when a thread is waiting, else false
807		*/
808	<	public void testHasWaiters() throws InterruptedException {
808	>	public void testHasWaiters() {
809		final Mutex sync = new Mutex();
810	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
811	<	Thread t = new Thread(new CheckedRunnable() {
810	>	final ConditionObject c = sync.newCondition();
811	>	final BooleanLatch acquired = new BooleanLatch();
812	>	Thread t = newStartedThread(new CheckedRunnable() {
813		public void realRun() throws InterruptedException {
814	<	sync.acquire(1);
815	<	threadAssertFalse(sync.hasWaiters(c));
816	<	threadAssertEquals(0, sync.getWaitQueueLength(c));
814	>	sync.acquire();
815	>	assertHasWaitersLocked(sync, c, NO_THREADS);
816	>	assertFalse(sync.hasWaiters(c));
817	>	assertTrue(acquired.releaseShared(0));
818		c.await();
819	<	sync.release(1);
819	>	sync.release();
820		}});
821
822	<	t.start();
823	<	Thread.sleep(SHORT_DELAY_MS);
824	<	sync.acquire(1);
822	>	acquired.acquireShared(0);
823	>	sync.acquire();
824	>	assertHasWaitersLocked(sync, c, t);
825	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
826		assertTrue(sync.hasWaiters(c));
652	–	assertEquals(1, sync.getWaitQueueLength(c));
827		c.signal();
828	<	sync.release(1);
829	<	Thread.sleep(SHORT_DELAY_MS);
656	<	sync.acquire(1);
828	>	assertHasWaitersLocked(sync, c, NO_THREADS);
829	>	assertHasExclusiveQueuedThreads(sync, t);
830		assertFalse(sync.hasWaiters(c));
831	<	assertEquals(0, sync.getWaitQueueLength(c));
832	<	sync.release(1);
833	<	t.join(SHORT_DELAY_MS);
834	<	assertFalse(t.isAlive());
831	>	sync.release();
832	>
833	>	awaitTermination(t);
834	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
835		}
836
837		/**
838		* getWaitQueueLength returns number of waiting threads
839		*/
840	<	public void testGetWaitQueueLength() throws InterruptedException {
840	>	public void testGetWaitQueueLength() {
841		final Mutex sync = new Mutex();
842	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
843	<	Thread t1 = new Thread(new CheckedRunnable() {
842	>	final ConditionObject c = sync.newCondition();
843	>	final BooleanLatch acquired1 = new BooleanLatch();
844	>	final BooleanLatch acquired2 = new BooleanLatch();
845	>	final Thread t1 = newStartedThread(new CheckedRunnable() {
846		public void realRun() throws InterruptedException {
847	<	sync.acquire(1);
848	<	threadAssertFalse(sync.hasWaiters(c));
849	<	threadAssertEquals(0, sync.getWaitQueueLength(c));
847	>	sync.acquire();
848	>	assertHasWaitersLocked(sync, c, NO_THREADS);
849	>	assertEquals(0, sync.getWaitQueueLength(c));
850	>	assertTrue(acquired1.releaseShared(0));
851		c.await();
852	<	sync.release(1);
852	>	sync.release();
853		}});
854	+	acquired1.acquireShared(0);
855	+	sync.acquire();
856	+	assertHasWaitersLocked(sync, c, t1);
857	+	assertEquals(1, sync.getWaitQueueLength(c));
858	+	sync.release();
859
860	<	Thread t2 = new Thread(new CheckedRunnable() {
860	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
861		public void realRun() throws InterruptedException {
862	<	sync.acquire(1);
863	<	threadAssertTrue(sync.hasWaiters(c));
864	<	threadAssertEquals(1, sync.getWaitQueueLength(c));
862	>	sync.acquire();
863	>	assertHasWaitersLocked(sync, c, t1);
864	>	assertEquals(1, sync.getWaitQueueLength(c));
865	>	assertTrue(acquired2.releaseShared(0));
866		c.await();
867	<	sync.release(1);
867	>	sync.release();
868		}});
869	<
870	<	t1.start();
871	<	Thread.sleep(SHORT_DELAY_MS);
872	<	t2.start();
691	<	Thread.sleep(SHORT_DELAY_MS);
692	<	sync.acquire(1);
693	<	assertTrue(sync.hasWaiters(c));
869	>	acquired2.acquireShared(0);
870	>	sync.acquire();
871	>	assertHasWaitersLocked(sync, c, t1, t2);
872	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
873		assertEquals(2, sync.getWaitQueueLength(c));
874		c.signalAll();
875	<	sync.release(1);
876	<	Thread.sleep(SHORT_DELAY_MS);
698	<	sync.acquire(1);
699	<	assertFalse(sync.hasWaiters(c));
875	>	assertHasWaitersLocked(sync, c, NO_THREADS);
876	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
877		assertEquals(0, sync.getWaitQueueLength(c));
878	<	sync.release(1);
879	<	t1.join(SHORT_DELAY_MS);
880	<	t2.join(SHORT_DELAY_MS);
881	<	assertFalse(t1.isAlive());
882	<	assertFalse(t2.isAlive());
878	>	sync.release();
879	>
880	>	awaitTermination(t1);
881	>	awaitTermination(t2);
882	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
883		}
884
885		/**
886		* getWaitingThreads returns only and all waiting threads
887		*/
888	<	public void testGetWaitingThreads() throws InterruptedException {
888	>	public void testGetWaitingThreads() {
889		final Mutex sync = new Mutex();
890	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
891	<	Thread t1 = new Thread(new CheckedRunnable() {
890	>	final ConditionObject c = sync.newCondition();
891	>	final BooleanLatch acquired1 = new BooleanLatch();
892	>	final BooleanLatch acquired2 = new BooleanLatch();
893	>	final Thread t1 = new Thread(new CheckedRunnable() {
894		public void realRun() throws InterruptedException {
895	<	sync.acquire(1);
896	<	threadAssertTrue(sync.getWaitingThreads(c).isEmpty());
895	>	sync.acquire();
896	>	assertHasWaitersLocked(sync, c, NO_THREADS);
897	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
898	>	assertTrue(acquired1.releaseShared(0));
899		c.await();
900	<	sync.release(1);
900	>	sync.release();
901		}});
902
903	<	Thread t2 = new Thread(new CheckedRunnable() {
903	>	final Thread t2 = new Thread(new CheckedRunnable() {
904		public void realRun() throws InterruptedException {
905	<	sync.acquire(1);
906	<	threadAssertFalse(sync.getWaitingThreads(c).isEmpty());
905	>	sync.acquire();
906	>	assertHasWaitersLocked(sync, c, t1);
907	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
908	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
909	>	assertEquals(1, sync.getWaitingThreads(c).size());
910	>	assertTrue(acquired2.releaseShared(0));
911		c.await();
912	<	sync.release(1);
912	>	sync.release();
913		}});
914
915	<	sync.acquire(1);
915	>	sync.acquire();
916	>	assertHasWaitersLocked(sync, c, NO_THREADS);
917	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
918	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
919		assertTrue(sync.getWaitingThreads(c).isEmpty());
920	<	sync.release(1);
920	>	assertEquals(0, sync.getWaitingThreads(c).size());
921	>	sync.release();
922	>
923		t1.start();
924	<	Thread.sleep(SHORT_DELAY_MS);
924	>	acquired1.acquireShared(0);
925	>	sync.acquire();
926	>	assertHasWaitersLocked(sync, c, t1);
927	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
928	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
929	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
930	>	assertEquals(1, sync.getWaitingThreads(c).size());
931	>	sync.release();
932	>
933		t2.start();
934	<	Thread.sleep(SHORT_DELAY_MS);
935	<	sync.acquire(1);
936	<	assertTrue(sync.hasWaiters(c));
934	>	acquired2.acquireShared(0);
935	>	sync.acquire();
936	>	assertHasWaitersLocked(sync, c, t1, t2);
937	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
938		assertTrue(sync.getWaitingThreads(c).contains(t1));
939		assertTrue(sync.getWaitingThreads(c).contains(t2));
940	+	assertFalse(sync.getWaitingThreads(c).isEmpty());
941	+	assertEquals(2, sync.getWaitingThreads(c).size());
942		c.signalAll();
943	<	sync.release(1);
944	<	Thread.sleep(SHORT_DELAY_MS);
945	<	sync.acquire(1);
946	<	assertFalse(sync.hasWaiters(c));
943	>	assertHasWaitersLocked(sync, c, NO_THREADS);
944	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
945	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
946	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
947		assertTrue(sync.getWaitingThreads(c).isEmpty());
948	<	sync.release(1);
949	<	t1.join(SHORT_DELAY_MS);
749	<	t2.join(SHORT_DELAY_MS);
750	<	assertFalse(t1.isAlive());
751	<	assertFalse(t2.isAlive());
752	<	}
753	<
948	>	assertEquals(0, sync.getWaitingThreads(c).size());
949	>	sync.release();
950
951	+	awaitTermination(t1);
952	+	awaitTermination(t2);
953	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
954	+	}
955
956		/**
957	<	* awaitUninterruptibly doesn't abort on interrupt
957	>	* awaitUninterruptibly is uninterruptible
958		*/
959	<	public void testAwaitUninterruptibly() throws InterruptedException {
959	>	public void testAwaitUninterruptibly() {
960		final Mutex sync = new Mutex();
961	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
962	<	Thread t = new Thread(new CheckedRunnable() {
961	>	final ConditionObject c = sync.newCondition();
962	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
963	>	Thread t = newStartedThread(new CheckedRunnable() {
964		public void realRun() {
965	<	sync.acquire(1);
965	>	sync.acquire();
966	>	assertTrue(pleaseInterrupt.releaseShared(0));
967		c.awaitUninterruptibly();
968	<	sync.release(1);
968	>	assertTrue(Thread.interrupted());
969	>	assertHasWaitersLocked(sync, c, NO_THREADS);
970	>	sync.release();
971		}});
972
973	<	t.start();
974	<	Thread.sleep(SHORT_DELAY_MS);
973	>	pleaseInterrupt.acquireShared(0);
974	>	sync.acquire();
975	>	assertHasWaitersLocked(sync, c, t);
976	>	sync.release();
977		t.interrupt();
978	<	sync.acquire(1);
978	>	assertHasWaitersUnlocked(sync, c, t);
979	>	assertThreadStaysAlive(t);
980	>	sync.acquire();
981	>	assertHasWaitersLocked(sync, c, t);
982	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
983		c.signal();
984	<	sync.release(1);
985	<	t.join(SHORT_DELAY_MS);
986	<	assertFalse(t.isAlive());
987	<	}
778	<
779	<	/**
780	<	* await is interruptible
781	<	*/
782	<	public void testAwait_Interrupt() throws InterruptedException {
783	<	final Mutex sync = new Mutex();
784	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
785	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
786	<	public void realRun() throws InterruptedException {
787	<	sync.acquire(1);
788	<	c.await();
789	<	sync.release(1);
790	<	}});
791	<
792	<	t.start();
793	<	Thread.sleep(SHORT_DELAY_MS);
794	<	t.interrupt();
795	<	t.join(SHORT_DELAY_MS);
796	<	assertFalse(t.isAlive());
984	>	assertHasWaitersLocked(sync, c, NO_THREADS);
985	>	assertHasExclusiveQueuedThreads(sync, t);
986	>	sync.release();
987	>	awaitTermination(t);
988		}
989
990		/**
991	<	* awaitNanos is interruptible
991	>	* await/awaitNanos/awaitUntil is interruptible
992		*/
993	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
993	>	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
994	>	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
995	>	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
996	>	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
997	>	public void testInterruptible(final AwaitMethod awaitMethod) {
998		final Mutex sync = new Mutex();
999	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
1000	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
999	>	final ConditionObject c = sync.newCondition();
1000	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
1001	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1002		public void realRun() throws InterruptedException {
1003	<	sync.acquire(1);
1004	<	c.awaitNanos(1000 * 1000 * 1000); // 1 sec
1005	<	sync.release(1);
1003	>	sync.acquire();
1004	>	assertTrue(pleaseInterrupt.releaseShared(0));
1005	>	await(c, awaitMethod);
1006		}});
1007
1008	<	t.start();
813	<	Thread.sleep(SHORT_DELAY_MS);
1008	>	pleaseInterrupt.acquireShared(0);
1009		t.interrupt();
1010	<	t.join(SHORT_DELAY_MS);
816	<	assertFalse(t.isAlive());
817	<	}
818	<
819	<	/**
820	<	* awaitUntil is interruptible
821	<	*/
822	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
823	<	final Mutex sync = new Mutex();
824	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
825	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
826	<	public void realRun() throws InterruptedException {
827	<	sync.acquire(1);
828	<	java.util.Date d = new java.util.Date();
829	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
830	<	sync.release(1);
831	<	}});
832	<
833	<	t.start();
834	<	Thread.sleep(SHORT_DELAY_MS);
835	<	t.interrupt();
836	<	t.join(SHORT_DELAY_MS);
837	<	assertFalse(t.isAlive());
1010	>	awaitTermination(t);
1011		}
1012
1013		/**
1014		* signalAll wakes up all threads
1015		*/
1016	<	public void testSignalAll() throws InterruptedException {
1017	<	final Mutex sync = new Mutex();
1018	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
1019	<	Thread t1 = new Thread(new CheckedRunnable() {
1016	>	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1017	>	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1018	>	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1019	>	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1020	>	public void testSignalAll(final AwaitMethod awaitMethod) {
1021	>	final Mutex sync = new Mutex();
1022	>	final ConditionObject c = sync.newCondition();
1023	>	final BooleanLatch acquired1 = new BooleanLatch();
1024	>	final BooleanLatch acquired2 = new BooleanLatch();
1025	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1026		public void realRun() throws InterruptedException {
1027	<	sync.acquire(1);
1028	<	c.await();
1029	<	sync.release(1);
1027	>	sync.acquire();
1028	>	acquired1.releaseShared(0);
1029	>	await(c, awaitMethod);
1030	>	sync.release();
1031		}});
1032
1033	<	Thread t2 = new Thread(new CheckedRunnable() {
1033	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1034		public void realRun() throws InterruptedException {
1035	<	sync.acquire(1);
1036	<	c.await();
1037	<	sync.release(1);
1035	>	sync.acquire();
1036	>	acquired2.releaseShared(0);
1037	>	await(c, awaitMethod);
1038	>	sync.release();
1039		}});
1040
1041	<	t1.start();
1042	<	t2.start();
1043	<	Thread.sleep(SHORT_DELAY_MS);
1044	<	sync.acquire(1);
1041	>	acquired1.acquireShared(0);
1042	>	acquired2.acquireShared(0);
1043	>	sync.acquire();
1044	>	assertHasWaitersLocked(sync, c, t1, t2);
1045	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1046		c.signalAll();
1047	<	sync.release(1);
1048	<	t1.join(SHORT_DELAY_MS);
1049	<	t2.join(SHORT_DELAY_MS);
1050	<	assertFalse(t1.isAlive());
1051	<	assertFalse(t2.isAlive());
1047	>	assertHasWaitersLocked(sync, c, NO_THREADS);
1048	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
1049	>	sync.release();
1050	>	awaitTermination(t1);
1051	>	awaitTermination(t2);
1052		}
1053
872	–
1054		/**
1055		* toString indicates current state
1056		*/
1057		public void testToString() {
1058		Mutex sync = new Mutex();
1059	<	String us = sync.toString();
1060	<	assertTrue(us.indexOf("State = 0") >= 0);
1061	<	sync.acquire(1);
881	<	String ls = sync.toString();
882	<	assertTrue(ls.indexOf("State = 1") >= 0);
1059	>	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1060	>	sync.acquire();
1061	>	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1062		}
1063
1064		/**
1065	<	* A serialized AQS deserializes with current state
1066	<	*/
1067	<	public void testSerialization() throws Exception {
1068	<	Mutex l = new Mutex();
1069	<	l.acquire(1);
1070	<	assertTrue(l.isHeldExclusively());
1071	<
1072	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1073	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
895	<	out.writeObject(l);
896	<	out.close();
897	<
898	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
899	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
900	<	Mutex r = (Mutex) in.readObject();
901	<	assertTrue(r.isHeldExclusively());
902	<	}
1065	>	* A serialized AQS deserializes with current state, but no queued threads
1066	>	*/
1067	>	public void testSerialization() {
1068	>	Mutex sync = new Mutex();
1069	>	assertFalse(serialClone(sync).isHeldExclusively());
1070	>	sync.acquire();
1071	>	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1072	>	waitForQueuedThread(sync, t);
1073	>	assertTrue(sync.isHeldExclusively());
1074
1075	+	Mutex clone = serialClone(sync);
1076	+	assertTrue(clone.isHeldExclusively());
1077	+	assertHasExclusiveQueuedThreads(sync, t);
1078	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1079	+	t.interrupt();
1080	+	awaitTermination(t);
1081	+	sync.release();
1082	+	assertFalse(sync.isHeldExclusively());
1083	+	assertTrue(clone.isHeldExclusively());
1084	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1085	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1086	+	}
1087
1088		/**
1089		* tryReleaseShared setting state changes getState
#	Line 908 | Line 1091 | public class AbstractQueuedSynchronizerT
1091		public void testGetStateWithReleaseShared() {
1092		final BooleanLatch l = new BooleanLatch();
1093		assertFalse(l.isSignalled());
1094	<	l.releaseShared(0);
1094	>	assertTrue(l.releaseShared(0));
1095		assertTrue(l.isSignalled());
1096		}
1097
#	Line 918 | Line 1101 | public class AbstractQueuedSynchronizerT
1101		public void testReleaseShared() {
1102		final BooleanLatch l = new BooleanLatch();
1103		assertFalse(l.isSignalled());
1104	<	l.releaseShared(0);
1104	>	assertTrue(l.releaseShared(0));
1105		assertTrue(l.isSignalled());
1106	<	l.releaseShared(0);
1106	>	assertTrue(l.releaseShared(0));
1107		assertTrue(l.isSignalled());
1108		}
1109
1110		/**
1111		* acquireSharedInterruptibly returns after release, but not before
1112		*/
1113	<	public void testAcquireSharedInterruptibly() throws InterruptedException {
1113	>	public void testAcquireSharedInterruptibly() {
1114		final BooleanLatch l = new BooleanLatch();
1115
1116	<	Thread t = new Thread(new CheckedRunnable() {
1116	>	Thread t = newStartedThread(new CheckedRunnable() {
1117		public void realRun() throws InterruptedException {
1118	<	threadAssertFalse(l.isSignalled());
1118	>	assertFalse(l.isSignalled());
1119		l.acquireSharedInterruptibly(0);
1120	<	threadAssertTrue(l.isSignalled());
1120	>	assertTrue(l.isSignalled());
1121	>	l.acquireSharedInterruptibly(0);
1122	>	assertTrue(l.isSignalled());
1123		}});
1124
1125	<	t.start();
1125	>	waitForQueuedThread(l, t);
1126		assertFalse(l.isSignalled());
1127	<	Thread.sleep(SHORT_DELAY_MS);
1128	<	l.releaseShared(0);
1127	>	assertThreadStaysAlive(t);
1128	>	assertHasSharedQueuedThreads(l, t);
1129	>	assertTrue(l.releaseShared(0));
1130		assertTrue(l.isSignalled());
1131	<	t.join();
1131	>	awaitTermination(t);
1132		}
1133
948	–
1134		/**
1135	<	* acquireSharedTimed returns after release
1135	>	* tryAcquireSharedNanos returns after release, but not before
1136		*/
1137	<	public void testAsquireSharedTimed() throws InterruptedException {
1137	>	public void testTryAcquireSharedNanos() {
1138		final BooleanLatch l = new BooleanLatch();
1139
1140	<	Thread t = new Thread(new CheckedRunnable() {
1140	>	Thread t = newStartedThread(new CheckedRunnable() {
1141		public void realRun() throws InterruptedException {
1142	<	threadAssertFalse(l.isSignalled());
1143	<	threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
1144	<	threadAssertTrue(l.isSignalled());
1142	>	assertFalse(l.isSignalled());
1143	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1144	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1145	>	assertTrue(l.isSignalled());
1146	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1147	>	assertTrue(l.isSignalled());
1148		}});
1149
1150	<	t.start();
1150	>	waitForQueuedThread(l, t);
1151		assertFalse(l.isSignalled());
1152	<	Thread.sleep(SHORT_DELAY_MS);
1153	<	l.releaseShared(0);
1152	>	assertThreadStaysAlive(t);
1153	>	assertTrue(l.releaseShared(0));
1154		assertTrue(l.isSignalled());
1155	<	t.join();
1155	>	awaitTermination(t);
1156		}
1157
1158		/**
1159	<	* acquireSharedInterruptibly throws IE if interrupted before released
1159	>	* acquireSharedInterruptibly is interruptible
1160		*/
1161	<	public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException {
1161	>	public void testAcquireSharedInterruptibly_Interruptible() {
1162		final BooleanLatch l = new BooleanLatch();
1163	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1163	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1164		public void realRun() throws InterruptedException {
1165	<	threadAssertFalse(l.isSignalled());
1165	>	assertFalse(l.isSignalled());
1166		l.acquireSharedInterruptibly(0);
1167		}});
1168
1169	<	t.start();
1169	>	waitForQueuedThread(l, t);
1170		assertFalse(l.isSignalled());
1171		t.interrupt();
1172	<	t.join();
1172	>	awaitTermination(t);
1173	>	assertFalse(l.isSignalled());
1174		}
1175
1176		/**
1177	<	* acquireSharedTimed throws IE if interrupted before released
1177	>	* tryAcquireSharedNanos is interruptible
1178		*/
1179	<	public void testAcquireSharedNanos_InterruptedException() throws InterruptedException {
1179	>	public void testTryAcquireSharedNanos_Interruptible() {
1180		final BooleanLatch l = new BooleanLatch();
1181	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1181	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1182		public void realRun() throws InterruptedException {
1183	<	threadAssertFalse(l.isSignalled());
1184	<	l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
1183	>	assertFalse(l.isSignalled());
1184	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1185	>	l.tryAcquireSharedNanos(0, nanos);
1186		}});
1187
1188	<	t.start();
999	<	Thread.sleep(SHORT_DELAY_MS);
1188	>	waitForQueuedThread(l, t);
1189		assertFalse(l.isSignalled());
1190		t.interrupt();
1191	<	t.join();
1191	>	awaitTermination(t);
1192	>	assertFalse(l.isSignalled());
1193		}
1194
1195		/**
1196	<	* acquireSharedTimed times out if not released before timeout
1196	>	* tryAcquireSharedNanos times out if not released before timeout
1197		*/
1198	<	public void testAcquireSharedNanos_Timeout() throws InterruptedException {
1198	>	public void testTryAcquireSharedNanos_Timeout() {
1199		final BooleanLatch l = new BooleanLatch();
1200	<	Thread t = new Thread(new CheckedRunnable() {
1200	>	final BooleanLatch observedQueued = new BooleanLatch();
1201	>	final long timeoutMillis = timeoutMillis();
1202	>	Thread t = newStartedThread(new CheckedRunnable() {
1203		public void realRun() throws InterruptedException {
1204	<	threadAssertFalse(l.isSignalled());
1205	<	threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1204	>	assertFalse(l.isSignalled());
1205	>	for (long millis = timeoutMillis();
1206	>	!observedQueued.isSignalled();
1207	>	millis *= 2) {
1208	>	long nanos = MILLISECONDS.toNanos(millis);
1209	>	long startTime = System.nanoTime();
1210	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1211	>	assertTrue(millisElapsedSince(startTime) >= millis);
1212	>	}
1213	>	assertFalse(l.isSignalled());
1214		}});
1215
1216	<	t.start();
1217	<	Thread.sleep(SHORT_DELAY_MS);
1216	>	waitForQueuedThread(l, t);
1217	>	observedQueued.releaseShared(0);
1218	>	assertFalse(l.isSignalled());
1219	>	awaitTermination(t);
1220		assertFalse(l.isSignalled());
1221	<	t.join();
1221	>	}
1222	>
1223	>	/**
1224	>	* awaitNanos/timed await with 0 wait times out immediately
1225	>	*/
1226	>	public void testAwait_Zero() throws InterruptedException {
1227	>	final Mutex sync = new Mutex();
1228	>	final ConditionObject c = sync.newCondition();
1229	>	sync.acquire();
1230	>	assertTrue(c.awaitNanos(0L) <= 0);
1231	>	assertFalse(c.await(0L, NANOSECONDS));
1232	>	sync.release();
1233	>	}
1234	>
1235	>	/**
1236	>	* awaitNanos/timed await with maximum negative wait times does not underflow
1237	>	*/
1238	>	public void testAwait_NegativeInfinity() throws InterruptedException {
1239	>	final Mutex sync = new Mutex();
1240	>	final ConditionObject c = sync.newCondition();
1241	>	sync.acquire();
1242	>	assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
1243	>	assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
1244	>	sync.release();
1245		}
1246
1247		}

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