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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 1.62 by dl, Sun Jan 7 23:05:44 2018 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.ArrayList;
13	>	import java.util.Arrays;
14	>	import java.util.Collection;
15	>	import java.util.HashSet;
16	>	import java.util.concurrent.ThreadLocalRandom;
17	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer;
18	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject;
19	>
20	>	import junit.framework.AssertionFailedError;
21	>	import junit.framework.Test;
22	>	import junit.framework.TestSuite;
23
24	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
25		public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run (suite());
27	>	main(suite(), args);
28		}
29		public static Test suite() {
30		return new TestSuite(AbstractQueuedSynchronizerTest.class);
31		}
32
33		/**
34	<	* A simple mutex class, adapted from the
35	<	* AbstractQueuedSynchronizer javadoc.  Exclusive acquire tests
36	<	* exercise this as a sample user extension.  Other
37	<	* methods/features of AbstractQueuedSynchronizerTest are tested
38	<	* via other test classes, including those for ReentrantLock,
39	<	* ReentrantReadWriteLock, and Semaphore
34	>	* A simple mutex class, adapted from the class javadoc.  Exclusive
35	>	* acquire tests exercise this as a sample user extension.  Other
36	>	* methods/features of AbstractQueuedSynchronizer are tested via
37	>	* other test classes, including those for ReentrantLock,
38	>	* ReentrantReadWriteLock, and Semaphore.
39	>	*
40	>	* Unlike the javadoc sample, we don't track owner thread via
41	>	* AbstractOwnableSynchronizer methods.
42		*/
43		static class Mutex extends AbstractQueuedSynchronizer {
44	<	public boolean isHeldExclusively() { return getState() == 1; }
44	>	/** An eccentric value for locked synchronizer state. */
45	>	static final int LOCKED = (1 << 31) | (1 << 15);
46
47	<	public boolean tryAcquire(int acquires) {
48	<	assertTrue(acquires == 1);
49	<	return compareAndSetState(0, 1);
47	>	static final int UNLOCKED = 0;
48	>
49	>	/** Owner thread is untracked, so this is really just isLocked(). */
50	>	@Override public boolean isHeldExclusively() {
51	>	int state = getState();
52	>	assertTrue(state == UNLOCKED || state == LOCKED);
53	>	return state == LOCKED;
54		}
55
56	<	public boolean tryRelease(int releases) {
57	<	if (getState() == 0) throw new IllegalMonitorStateException();
58	<	setState(0);
56	>	@Override protected boolean tryAcquire(int acquires) {
57	>	assertEquals(LOCKED, acquires);
58	>	return compareAndSetState(UNLOCKED, LOCKED);
59	>	}
60	>
61	>	@Override protected boolean tryRelease(int releases) {
62	>	if (getState() != LOCKED) throw new IllegalMonitorStateException();
63	>	assertEquals(LOCKED, releases);
64	>	setState(UNLOCKED);
65		return true;
66		}
67
68	<	public AbstractQueuedSynchronizer.ConditionObject newCondition() { return new AbstractQueuedSynchronizer.ConditionObject(); }
68	>	public boolean tryAcquireNanos(long nanos) throws InterruptedException {
69	>	return tryAcquireNanos(LOCKED, nanos);
70	>	}
71
72	<	}
72	>	public boolean tryAcquire() {
73	>	return tryAcquire(LOCKED);
74	>	}
75	>
76	>	public boolean tryRelease() {
77	>	return tryRelease(LOCKED);
78	>	}
79	>
80	>	public void acquire() {
81	>	acquire(LOCKED);
82	>	}
83	>
84	>	public void acquireInterruptibly() throws InterruptedException {
85	>	acquireInterruptibly(LOCKED);
86	>	}
87
88	+	public void release() {
89	+	release(LOCKED);
90	+	}
91	+
92	+	/** Faux-Implements Lock.newCondition(). */
93	+	public ConditionObject newCondition() {
94	+	return new ConditionObject();
95	+	}
96	+	}
97
98		/**
99	<	* A simple latch class, to test shared mode.
99	>	* A minimal latch class, to test shared mode.
100		*/
101		static class BooleanLatch extends AbstractQueuedSynchronizer {
102		public boolean isSignalled() { return getState() != 0; }
103
104		public int tryAcquireShared(int ignore) {
105	<	return isSignalled()? 1 : -1;
105	>	return isSignalled() ? 1 : -1;
106		}
107
108		public boolean tryReleaseShared(int ignore) {
#	Line 71 | Line 117 | public class AbstractQueuedSynchronizerT
117		*/
118		class InterruptibleSyncRunnable extends CheckedRunnable {
119		final Mutex sync;
120	<	InterruptibleSyncRunnable(Mutex l) { sync = l; }
120	>	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
121		public void realRun() throws InterruptedException {
122	<	sync.acquireInterruptibly(1);
122	>	sync.acquireInterruptibly();
123		}
124		}
125
80	–
126		/**
127		* A runnable calling acquireInterruptibly that expects to be
128		* interrupted.
129		*/
130		class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
131		final Mutex sync;
132	<	InterruptedSyncRunnable(Mutex l) { sync = l; }
132	>	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
133		public void realRun() throws InterruptedException {
134	<	sync.acquireInterruptibly(1);
134	>	sync.acquireInterruptibly();
135	>	}
136	>	}
137	>
138	>	/** A constant to clarify calls to checking methods below. */
139	>	static final Thread[] NO_THREADS = new Thread[0];
140	>
141	>	/**
142	>	* Spin-waits until sync.isQueued(t) becomes true.
143	>	*/
144	>	void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) {
145	>	long startTime = System.nanoTime();
146	>	while (!sync.isQueued(t)) {
147	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
148	>	throw new AssertionFailedError("timed out");
149	>	Thread.yield();
150	>	}
151	>	assertTrue(t.isAlive());
152	>	}
153	>
154	>	/**
155	>	* Checks that sync has exactly the given queued threads.
156	>	*/
157	>	void assertHasQueuedThreads(AbstractQueuedSynchronizer sync,
158	>	Thread... expected) {
159	>	Collection<Thread> actual = sync.getQueuedThreads();
160	>	assertEquals(expected.length > 0, sync.hasQueuedThreads());
161	>	assertEquals(expected.length, sync.getQueueLength());
162	>	assertEquals(expected.length, actual.size());
163	>	assertEquals(expected.length == 0, actual.isEmpty());
164	>	assertEquals(new HashSet<Thread>(actual),
165	>	new HashSet<Thread>(Arrays.asList(expected)));
166	>	}
167	>
168	>	/**
169	>	* Checks that sync has exactly the given (exclusive) queued threads.
170	>	*/
171	>	void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync,
172	>	Thread... expected) {
173	>	assertHasQueuedThreads(sync, expected);
174	>	assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()),
175	>	new HashSet<Thread>(sync.getQueuedThreads()));
176	>	assertEquals(0, sync.getSharedQueuedThreads().size());
177	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
178	>	}
179	>
180	>	/**
181	>	* Checks that sync has exactly the given (shared) queued threads.
182	>	*/
183	>	void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync,
184	>	Thread... expected) {
185	>	assertHasQueuedThreads(sync, expected);
186	>	assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()),
187	>	new HashSet<Thread>(sync.getQueuedThreads()));
188	>	assertEquals(0, sync.getExclusiveQueuedThreads().size());
189	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
190	>	}
191	>
192	>	/**
193	>	* Checks that condition c has exactly the given waiter threads,
194	>	* after acquiring mutex.
195	>	*/
196	>	void assertHasWaitersUnlocked(Mutex sync, ConditionObject c,
197	>	Thread... threads) {
198	>	sync.acquire();
199	>	assertHasWaitersLocked(sync, c, threads);
200	>	sync.release();
201	>	}
202	>
203	>	/**
204	>	* Checks that condition c has exactly the given waiter threads.
205	>	*/
206	>	void assertHasWaitersLocked(Mutex sync, ConditionObject c,
207	>	Thread... threads) {
208	>	assertEquals(threads.length > 0, sync.hasWaiters(c));
209	>	assertEquals(threads.length, sync.getWaitQueueLength(c));
210	>	assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty());
211	>	assertEquals(threads.length, sync.getWaitingThreads(c).size());
212	>	assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)),
213	>	new HashSet<Thread>(Arrays.asList(threads)));
214	>	}
215	>
216	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
217	>
218	>	/**
219	>	* Awaits condition using the specified AwaitMethod.
220	>	*/
221	>	void await(ConditionObject c, AwaitMethod awaitMethod)
222	>	throws InterruptedException {
223	>	long timeoutMillis = 2 * LONG_DELAY_MS;
224	>	switch (awaitMethod) {
225	>	case await:
226	>	c.await();
227	>	break;
228	>	case awaitTimed:
229	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
230	>	break;
231	>	case awaitNanos:
232	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
233	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
234	>	assertTrue(nanosRemaining > 0);
235	>	break;
236	>	case awaitUntil:
237	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
238	>	break;
239	>	default:
240	>	throw new AssertionError();
241		}
242		}
243
244		/**
245	+	* Checks that awaiting the given condition times out (using the
246	+	* default timeout duration).
247	+	*/
248	+	void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
249	+	final long timeoutMillis = timeoutMillis();
250	+	final long startTime;
251	+	try {
252	+	switch (awaitMethod) {
253	+	case awaitTimed:
254	+	startTime = System.nanoTime();
255	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
256	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
257	+	break;
258	+	case awaitNanos:
259	+	startTime = System.nanoTime();
260	+	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
261	+	long nanosRemaining = c.awaitNanos(nanosTimeout);
262	+	assertTrue(nanosRemaining <= 0);
263	+	assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS));
264	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
265	+	break;
266	+	case awaitUntil:
267	+	// We shouldn't assume that nanoTime and currentTimeMillis
268	+	// use the same time source, so don't use nanoTime here.
269	+	java.util.Date delayedDate = delayedDate(timeoutMillis);
270	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
271	+	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
272	+	break;
273	+	default:
274	+	throw new UnsupportedOperationException();
275	+	}
276	+	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
277	+	}
278	+
279	+	/**
280		* isHeldExclusively is false upon construction
281		*/
282		public void testIsHeldExclusively() {
283	<	Mutex rl = new Mutex();
284	<	assertFalse(rl.isHeldExclusively());
283	>	Mutex sync = new Mutex();
284	>	assertFalse(sync.isHeldExclusively());
285		}
286
287		/**
288		* acquiring released sync succeeds
289		*/
290		public void testAcquire() {
291	<	Mutex rl = new Mutex();
292	<	rl.acquire(1);
293	<	assertTrue(rl.isHeldExclusively());
294	<	rl.release(1);
295	<	assertFalse(rl.isHeldExclusively());
291	>	Mutex sync = new Mutex();
292	>	sync.acquire();
293	>	assertTrue(sync.isHeldExclusively());
294	>	sync.release();
295	>	assertFalse(sync.isHeldExclusively());
296		}
297
298		/**
299	<	* tryAcquire on an released sync succeeds
299	>	* tryAcquire on a released sync succeeds
300		*/
301		public void testTryAcquire() {
302	<	Mutex rl = new Mutex();
303	<	assertTrue(rl.tryAcquire(1));
304	<	assertTrue(rl.isHeldExclusively());
305	<	rl.release(1);
302	>	Mutex sync = new Mutex();
303	>	assertTrue(sync.tryAcquire());
304	>	assertTrue(sync.isHeldExclusively());
305	>	sync.release();
306	>	assertFalse(sync.isHeldExclusively());
307		}
308
309		/**
310		* hasQueuedThreads reports whether there are waiting threads
311		*/
312	<	public void testhasQueuedThreads() throws InterruptedException {
312	>	public void testHasQueuedThreads() {
313		final Mutex sync = new Mutex();
127	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
128	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
314		assertFalse(sync.hasQueuedThreads());
315	<	sync.acquire(1);
316	<	t1.start();
317	<	Thread.sleep(SHORT_DELAY_MS);
315	>	sync.acquire();
316	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
317	>	waitForQueuedThread(sync, t1);
318		assertTrue(sync.hasQueuedThreads());
319	<	t2.start();
320	<	Thread.sleep(SHORT_DELAY_MS);
319	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
320	>	waitForQueuedThread(sync, t2);
321		assertTrue(sync.hasQueuedThreads());
322		t1.interrupt();
323	<	Thread.sleep(SHORT_DELAY_MS);
323	>	awaitTermination(t1);
324		assertTrue(sync.hasQueuedThreads());
325	<	sync.release(1);
326	<	Thread.sleep(SHORT_DELAY_MS);
325	>	sync.release();
326	>	awaitTermination(t2);
327		assertFalse(sync.hasQueuedThreads());
143	–	t1.join();
144	–	t2.join();
328		}
329
330		/**
331	<	* isQueued(null) throws NPE
331	>	* isQueued(null) throws NullPointerException
332		*/
333		public void testIsQueuedNPE() {
334		final Mutex sync = new Mutex();
#	Line 156 | Line 339 | public class AbstractQueuedSynchronizerT
339		}
340
341		/**
342	<	* isQueued reports whether a thread is queued.
342	>	* isQueued reports whether a thread is queued
343		*/
344	<	public void testIsQueued() throws InterruptedException {
344	>	public void testIsQueued() {
345		final Mutex sync = new Mutex();
346		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
347		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
348		assertFalse(sync.isQueued(t1));
349		assertFalse(sync.isQueued(t2));
350	<	sync.acquire(1);
350	>	sync.acquire();
351		t1.start();
352	<	Thread.sleep(SHORT_DELAY_MS);
352	>	waitForQueuedThread(sync, t1);
353		assertTrue(sync.isQueued(t1));
354	+	assertFalse(sync.isQueued(t2));
355		t2.start();
356	<	Thread.sleep(SHORT_DELAY_MS);
356	>	waitForQueuedThread(sync, t2);
357		assertTrue(sync.isQueued(t1));
358		assertTrue(sync.isQueued(t2));
359		t1.interrupt();
360	<	Thread.sleep(SHORT_DELAY_MS);
360	>	awaitTermination(t1);
361		assertFalse(sync.isQueued(t1));
362		assertTrue(sync.isQueued(t2));
363	<	sync.release(1);
364	<	Thread.sleep(SHORT_DELAY_MS);
363	>	sync.release();
364	>	awaitTermination(t2);
365		assertFalse(sync.isQueued(t1));
182	–	Thread.sleep(SHORT_DELAY_MS);
366		assertFalse(sync.isQueued(t2));
184	–	t1.join();
185	–	t2.join();
367		}
368
369		/**
370		* getFirstQueuedThread returns first waiting thread or null if none
371		*/
372	<	public void testGetFirstQueuedThread() throws InterruptedException {
372	>	public void testGetFirstQueuedThread() {
373		final Mutex sync = new Mutex();
193	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
194	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
374		assertNull(sync.getFirstQueuedThread());
375	<	sync.acquire(1);
376	<	t1.start();
377	<	Thread.sleep(SHORT_DELAY_MS);
375	>	sync.acquire();
376	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
377	>	waitForQueuedThread(sync, t1);
378		assertEquals(t1, sync.getFirstQueuedThread());
379	<	t2.start();
380	<	Thread.sleep(SHORT_DELAY_MS);
379	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
380	>	waitForQueuedThread(sync, t2);
381		assertEquals(t1, sync.getFirstQueuedThread());
382		t1.interrupt();
383	<	Thread.sleep(SHORT_DELAY_MS);
205	<	Thread.sleep(SHORT_DELAY_MS);
383	>	awaitTermination(t1);
384		assertEquals(t2, sync.getFirstQueuedThread());
385	<	sync.release(1);
386	<	Thread.sleep(SHORT_DELAY_MS);
385	>	sync.release();
386	>	awaitTermination(t2);
387		assertNull(sync.getFirstQueuedThread());
210	–	t1.join();
211	–	t2.join();
388		}
389
214	–
390		/**
391		* hasContended reports false if no thread has ever blocked, else true
392		*/
393	<	public void testHasContended() throws InterruptedException {
393	>	public void testHasContended() {
394		final Mutex sync = new Mutex();
220	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
221	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
395		assertFalse(sync.hasContended());
396	<	sync.acquire(1);
397	<	t1.start();
398	<	Thread.sleep(SHORT_DELAY_MS);
396	>	sync.acquire();
397	>	assertFalse(sync.hasContended());
398	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
399	>	waitForQueuedThread(sync, t1);
400		assertTrue(sync.hasContended());
401	<	t2.start();
402	<	Thread.sleep(SHORT_DELAY_MS);
401	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
402	>	waitForQueuedThread(sync, t2);
403		assertTrue(sync.hasContended());
404		t1.interrupt();
405	<	Thread.sleep(SHORT_DELAY_MS);
405	>	awaitTermination(t1);
406		assertTrue(sync.hasContended());
407	<	sync.release(1);
408	<	Thread.sleep(SHORT_DELAY_MS);
407	>	sync.release();
408	>	awaitTermination(t2);
409		assertTrue(sync.hasContended());
236	–	t1.join();
237	–	t2.join();
410		}
411
412		/**
413	<	* getQueuedThreads includes waiting threads
413	>	* getQueuedThreads returns all waiting threads
414		*/
415	<	public void testGetQueuedThreads() throws InterruptedException {
415	>	public void testGetQueuedThreads() {
416		final Mutex sync = new Mutex();
417		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
418		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
419	<	assertTrue(sync.getQueuedThreads().isEmpty());
420	<	sync.acquire(1);
421	<	assertTrue(sync.getQueuedThreads().isEmpty());
419	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
420	>	sync.acquire();
421	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
422		t1.start();
423	<	Thread.sleep(SHORT_DELAY_MS);
423	>	waitForQueuedThread(sync, t1);
424	>	assertHasExclusiveQueuedThreads(sync, t1);
425		assertTrue(sync.getQueuedThreads().contains(t1));
426	+	assertFalse(sync.getQueuedThreads().contains(t2));
427		t2.start();
428	<	Thread.sleep(SHORT_DELAY_MS);
428	>	waitForQueuedThread(sync, t2);
429	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
430		assertTrue(sync.getQueuedThreads().contains(t1));
431		assertTrue(sync.getQueuedThreads().contains(t2));
432		t1.interrupt();
433	<	Thread.sleep(SHORT_DELAY_MS);
434	<	assertFalse(sync.getQueuedThreads().contains(t1));
435	<	assertTrue(sync.getQueuedThreads().contains(t2));
436	<	sync.release(1);
437	<	Thread.sleep(SHORT_DELAY_MS);
263	<	assertTrue(sync.getQueuedThreads().isEmpty());
264	<	t1.join();
265	<	t2.join();
433	>	awaitTermination(t1);
434	>	assertHasExclusiveQueuedThreads(sync, t2);
435	>	sync.release();
436	>	awaitTermination(t2);
437	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
438		}
439
440		/**
441	<	* getExclusiveQueuedThreads includes waiting threads
441	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
442		*/
443	<	public void testGetExclusiveQueuedThreads() throws InterruptedException {
443	>	public void testGetExclusiveQueuedThreads() {
444		final Mutex sync = new Mutex();
445		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
446		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
447	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
448	<	sync.acquire(1);
449	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
447	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
448	>	sync.acquire();
449	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
450		t1.start();
451	<	Thread.sleep(SHORT_DELAY_MS);
451	>	waitForQueuedThread(sync, t1);
452	>	assertHasExclusiveQueuedThreads(sync, t1);
453		assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
454	+	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
455		t2.start();
456	<	Thread.sleep(SHORT_DELAY_MS);
456	>	waitForQueuedThread(sync, t2);
457	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
458		assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
459		assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
460		t1.interrupt();
461	<	Thread.sleep(SHORT_DELAY_MS);
462	<	assertFalse(sync.getExclusiveQueuedThreads().contains(t1));
463	<	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
464	<	sync.release(1);
465	<	Thread.sleep(SHORT_DELAY_MS);
291	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
292	<	t1.join();
293	<	t2.join();
461	>	awaitTermination(t1);
462	>	assertHasExclusiveQueuedThreads(sync, t2);
463	>	sync.release();
464	>	awaitTermination(t2);
465	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
466		}
467
468		/**
469		* getSharedQueuedThreads does not include exclusively waiting threads
470		*/
471	<	public void testGetSharedQueuedThreads() throws InterruptedException {
471	>	public void testGetSharedQueuedThreads_Exclusive() {
472		final Mutex sync = new Mutex();
301	–	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
302	–	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
473		assertTrue(sync.getSharedQueuedThreads().isEmpty());
474	<	sync.acquire(1);
474	>	sync.acquire();
475		assertTrue(sync.getSharedQueuedThreads().isEmpty());
476	<	t1.start();
477	<	Thread.sleep(SHORT_DELAY_MS);
476	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
477	>	waitForQueuedThread(sync, t1);
478		assertTrue(sync.getSharedQueuedThreads().isEmpty());
479	<	t2.start();
480	<	Thread.sleep(SHORT_DELAY_MS);
479	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
480	>	waitForQueuedThread(sync, t2);
481		assertTrue(sync.getSharedQueuedThreads().isEmpty());
482		t1.interrupt();
483	<	Thread.sleep(SHORT_DELAY_MS);
483	>	awaitTermination(t1);
484		assertTrue(sync.getSharedQueuedThreads().isEmpty());
485	<	sync.release(1);
486	<	Thread.sleep(SHORT_DELAY_MS);
485	>	sync.release();
486	>	awaitTermination(t2);
487		assertTrue(sync.getSharedQueuedThreads().isEmpty());
318	–	t1.join();
319	–	t2.join();
488		}
489
490		/**
491	<	* tryAcquireNanos is interruptible.
491	>	* getSharedQueuedThreads returns all shared waiting threads
492		*/
493	<	public void testInterruptedException2() throws InterruptedException {
493	>	public void testGetSharedQueuedThreads_Shared() {
494	>	final BooleanLatch l = new BooleanLatch();
495	>	assertHasSharedQueuedThreads(l, NO_THREADS);
496	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
497	>	public void realRun() throws InterruptedException {
498	>	l.acquireSharedInterruptibly(0);
499	>	}});
500	>	waitForQueuedThread(l, t1);
501	>	assertHasSharedQueuedThreads(l, t1);
502	>	Thread t2 = newStartedThread(new CheckedRunnable() {
503	>	public void realRun() throws InterruptedException {
504	>	l.acquireSharedInterruptibly(0);
505	>	}});
506	>	waitForQueuedThread(l, t2);
507	>	assertHasSharedQueuedThreads(l, t1, t2);
508	>	t1.interrupt();
509	>	awaitTermination(t1);
510	>	assertHasSharedQueuedThreads(l, t2);
511	>	assertTrue(l.releaseShared(0));
512	>	awaitTermination(t2);
513	>	assertHasSharedQueuedThreads(l, NO_THREADS);
514	>	}
515	>
516	>	/**
517	>	* tryAcquireNanos is interruptible
518	>	*/
519	>	public void testTryAcquireNanos_Interruptible() {
520		final Mutex sync = new Mutex();
521	<	sync.acquire(1);
522	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
521	>	sync.acquire();
522	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
523		public void realRun() throws InterruptedException {
524	<	sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000 * 1000);
524	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
525		}});
526
527	<	t.start();
527	>	waitForQueuedThread(sync, t);
528		t.interrupt();
529	<	t.join();
529	>	awaitTermination(t);
530		}
531
338	–
532		/**
533	<	* TryAcquire on exclusively held sync fails
533	>	* tryAcquire on exclusively held sync fails
534		*/
535	<	public void testTryAcquireWhenSynced() throws InterruptedException {
535	>	public void testTryAcquireWhenSynced() {
536		final Mutex sync = new Mutex();
537	<	sync.acquire(1);
538	<	Thread t = new Thread(new CheckedRunnable() {
537	>	sync.acquire();
538	>	Thread t = newStartedThread(new CheckedRunnable() {
539		public void realRun() {
540	<	threadAssertFalse(sync.tryAcquire(1));
540	>	assertFalse(sync.tryAcquire());
541		}});
542
543	<	t.start();
544	<	t.join();
352	<	sync.release(1);
543	>	awaitTermination(t);
544	>	sync.release();
545		}
546
547		/**
548		* tryAcquireNanos on an exclusively held sync times out
549		*/
550	<	public void testAcquireNanos_Timeout() throws InterruptedException {
550	>	public void testAcquireNanos_Timeout() {
551		final Mutex sync = new Mutex();
552	<	sync.acquire(1);
553	<	Thread t = new Thread(new CheckedRunnable() {
552	>	sync.acquire();
553	>	Thread t = newStartedThread(new CheckedRunnable() {
554		public void realRun() throws InterruptedException {
555	<	threadAssertFalse(sync.tryAcquireNanos(1, 1000 * 1000));
555	>	long startTime = System.nanoTime();
556	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
557	>	assertFalse(sync.tryAcquireNanos(nanos));
558	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
559		}});
560
561	<	t.start();
562	<	t.join();
368	<	sync.release(1);
561	>	awaitTermination(t);
562	>	sync.release();
563		}
564
371	–
565		/**
566		* getState is true when acquired and false when not
567		*/
568	<	public void testGetState() throws InterruptedException {
568	>	public void testGetState() {
569		final Mutex sync = new Mutex();
570	<	sync.acquire(1);
570	>	sync.acquire();
571		assertTrue(sync.isHeldExclusively());
572	<	sync.release(1);
572	>	sync.release();
573		assertFalse(sync.isHeldExclusively());
574	<	Thread t = new Thread(new CheckedRunnable() {
574	>
575	>	final BooleanLatch acquired = new BooleanLatch();
576	>	final BooleanLatch done = new BooleanLatch();
577	>	Thread t = newStartedThread(new CheckedRunnable() {
578		public void realRun() throws InterruptedException {
579	<	sync.acquire(1);
580	<	Thread.sleep(SMALL_DELAY_MS);
581	<	sync.release(1);
579	>	sync.acquire();
580	>	assertTrue(acquired.releaseShared(0));
581	>	done.acquireShared(0);
582	>	sync.release();
583		}});
584
585	<	t.start();
389	<	Thread.sleep(SHORT_DELAY_MS);
585	>	acquired.acquireShared(0);
586		assertTrue(sync.isHeldExclusively());
587	<	t.join();
587	>	assertTrue(done.releaseShared(0));
588	>	awaitTermination(t);
589		assertFalse(sync.isHeldExclusively());
590		}
591
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	–
592		/**
593		* acquireInterruptibly succeeds when released, else is interruptible
594		*/
595	<	public void testAcquireInterruptibly2() throws InterruptedException {
595	>	public void testAcquireInterruptibly() throws InterruptedException {
596		final Mutex sync = new Mutex();
597	<	sync.acquireInterruptibly(1);
598	<	Thread t = new Thread(new InterruptedSyncRunnable(sync));
599	<	t.start();
597	>	final BooleanLatch threadStarted = new BooleanLatch();
598	>	sync.acquireInterruptibly();
599	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
600	>	public void realRun() throws InterruptedException {
601	>	assertTrue(threadStarted.releaseShared(0));
602	>	sync.acquireInterruptibly();
603	>	}});
604	>
605	>	threadStarted.acquireShared(0);
606	>	waitForQueuedThread(sync, t);
607		t.interrupt();
608	+	awaitTermination(t);
609		assertTrue(sync.isHeldExclusively());
422	–	t.join();
610		}
611
612		/**
#	Line 427 | Line 614 | public class AbstractQueuedSynchronizerT
614		*/
615		public void testOwns() {
616		final Mutex sync = new Mutex();
617	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
617	>	final ConditionObject c = sync.newCondition();
618		final Mutex sync2 = new Mutex();
619		assertTrue(sync.owns(c));
620		assertFalse(sync2.owns(c));
#	Line 436 | Line 623 | public class AbstractQueuedSynchronizerT
623		/**
624		* Calling await without holding sync throws IllegalMonitorStateException
625		*/
626	<	public void testAwait_IllegalMonitor() throws InterruptedException {
626	>	public void testAwait_IMSE() {
627		final Mutex sync = new Mutex();
628	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
629	<	try {
630	<	c.await();
631	<	shouldThrow();
632	<	} catch (IllegalMonitorStateException success) {}
628	>	final ConditionObject c = sync.newCondition();
629	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
630	>	long startTime = System.nanoTime();
631	>	try {
632	>	await(c, awaitMethod);
633	>	shouldThrow();
634	>	} catch (IllegalMonitorStateException success) {
635	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
636	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
637	>	}
638		}
639
640		/**
641		* Calling signal without holding sync throws IllegalMonitorStateException
642		*/
643	<	public void testSignal_IllegalMonitor() {
643	>	public void testSignal_IMSE() {
644		final Mutex sync = new Mutex();
645	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
645	>	final ConditionObject c = sync.newCondition();
646		try {
647		c.signal();
648		shouldThrow();
649		} catch (IllegalMonitorStateException success) {}
650	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
651		}
652
653		/**
654	<	* awaitNanos without a signal times out
462	<	*/
463	<	public void testAwaitNanos_Timeout() throws InterruptedException {
464	<	final Mutex sync = new Mutex();
465	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
466	<	sync.acquire(1);
467	<	long t = c.awaitNanos(100);
468	<	assertTrue(t <= 0);
469	<	sync.release(1);
470	<	}
471	<
472	<	/**
473	<	*  Timed await without a signal times out
654	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
655		*/
656	<	public void testAwait_Timeout() throws InterruptedException {
656	>	public void testSignalAll_IMSE() {
657		final Mutex sync = new Mutex();
658	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
659	<	sync.acquire(1);
660	<	assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS));
661	<	sync.release(1);
658	>	final ConditionObject c = sync.newCondition();
659	>	try {
660	>	c.signalAll();
661	>	shouldThrow();
662	>	} catch (IllegalMonitorStateException success) {}
663		}
664
665		/**
666	<	* awaitUntil without a signal times out
666	>	* await/awaitNanos/awaitUntil without a signal times out
667		*/
668	<	public void testAwaitUntil_Timeout() throws InterruptedException {
668	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
669	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
670	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
671	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
672		final Mutex sync = new Mutex();
673	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
674	<	sync.acquire(1);
675	<	java.util.Date d = new java.util.Date();
676	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
492	<	sync.release(1);
673	>	final ConditionObject c = sync.newCondition();
674	>	sync.acquire();
675	>	assertAwaitTimesOut(c, awaitMethod);
676	>	sync.release();
677		}
678
679		/**
680	<	* await returns when signalled
680	>	* await/awaitNanos/awaitUntil returns when signalled
681		*/
682	<	public void testAwait() throws InterruptedException {
682	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
683	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
684	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
685	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
686	>	public void testSignal(final AwaitMethod awaitMethod) {
687		final Mutex sync = new Mutex();
688	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
689	<	Thread t = new Thread(new CheckedRunnable() {
688	>	final ConditionObject c = sync.newCondition();
689	>	final BooleanLatch acquired = new BooleanLatch();
690	>	Thread t = newStartedThread(new CheckedRunnable() {
691		public void realRun() throws InterruptedException {
692	<	sync.acquire(1);
693	<	c.await();
694	<	sync.release(1);
692	>	sync.acquire();
693	>	assertTrue(acquired.releaseShared(0));
694	>	await(c, awaitMethod);
695	>	sync.release();
696		}});
697
698	<	t.start();
699	<	Thread.sleep(SHORT_DELAY_MS);
700	<	sync.acquire(1);
698	>	acquired.acquireShared(0);
699	>	sync.acquire();
700	>	assertHasWaitersLocked(sync, c, t);
701	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
702		c.signal();
703	<	sync.release(1);
704	<	t.join(SHORT_DELAY_MS);
705	<	assertFalse(t.isAlive());
703	>	assertHasWaitersLocked(sync, c, NO_THREADS);
704	>	assertHasExclusiveQueuedThreads(sync, t);
705	>	sync.release();
706	>	awaitTermination(t);
707		}
708
517	–
518	–
709		/**
710	<	* hasWaiters throws NPE if null
710	>	* hasWaiters(null) throws NullPointerException
711		*/
712		public void testHasWaitersNPE() {
713		final Mutex sync = new Mutex();
#	Line 528 | Line 718 | public class AbstractQueuedSynchronizerT
718		}
719
720		/**
721	<	* getWaitQueueLength throws NPE if null
721	>	* getWaitQueueLength(null) throws NullPointerException
722		*/
723		public void testGetWaitQueueLengthNPE() {
724		final Mutex sync = new Mutex();
#	Line 538 | Line 728 | public class AbstractQueuedSynchronizerT
728		} catch (NullPointerException success) {}
729		}
730
541	–
731		/**
732	<	* getWaitingThreads throws NPE if null
732	>	* getWaitingThreads(null) throws NullPointerException
733		*/
734		public void testGetWaitingThreadsNPE() {
735		final Mutex sync = new Mutex();
#	Line 550 | Line 739 | public class AbstractQueuedSynchronizerT
739		} catch (NullPointerException success) {}
740		}
741
553	–
742		/**
743	<	* hasWaiters throws IAE if not owned
743	>	* hasWaiters throws IllegalArgumentException if not owned
744		*/
745		public void testHasWaitersIAE() {
746		final Mutex sync = new Mutex();
747	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
747	>	final ConditionObject c = sync.newCondition();
748		final Mutex sync2 = new Mutex();
749		try {
750		sync2.hasWaiters(c);
751		shouldThrow();
752		} catch (IllegalArgumentException success) {}
753	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
754		}
755
756		/**
757	<	* hasWaiters throws IMSE if not synced
757	>	* hasWaiters throws IllegalMonitorStateException if not synced
758		*/
759		public void testHasWaitersIMSE() {
760		final Mutex sync = new Mutex();
761	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
761	>	final ConditionObject c = sync.newCondition();
762		try {
763		sync.hasWaiters(c);
764		shouldThrow();
765		} catch (IllegalMonitorStateException success) {}
766	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
767		}
768
579	–
769		/**
770	<	* getWaitQueueLength throws IAE if not owned
770	>	* getWaitQueueLength throws IllegalArgumentException if not owned
771		*/
772		public void testGetWaitQueueLengthIAE() {
773		final Mutex sync = new Mutex();
774	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
774	>	final ConditionObject c = sync.newCondition();
775		final Mutex sync2 = new Mutex();
776		try {
777		sync2.getWaitQueueLength(c);
778		shouldThrow();
779		} catch (IllegalArgumentException success) {}
780	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
781		}
782
783		/**
784	<	* getWaitQueueLength throws IMSE if not synced
784	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
785		*/
786		public void testGetWaitQueueLengthIMSE() {
787		final Mutex sync = new Mutex();
788	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
788	>	final ConditionObject c = sync.newCondition();
789		try {
790		sync.getWaitQueueLength(c);
791		shouldThrow();
792		} catch (IllegalMonitorStateException success) {}
793	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
794		}
795
605	–
796		/**
797	<	* getWaitingThreads throws IAE if not owned
797	>	* getWaitingThreads throws IllegalArgumentException if not owned
798		*/
799		public void testGetWaitingThreadsIAE() {
800		final Mutex sync = new Mutex();
801	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
801	>	final ConditionObject c = sync.newCondition();
802		final Mutex sync2 = new Mutex();
803		try {
804		sync2.getWaitingThreads(c);
805		shouldThrow();
806		} catch (IllegalArgumentException success) {}
807	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
808		}
809
810		/**
811	<	* getWaitingThreads throws IMSE if not synced
811	>	* getWaitingThreads throws IllegalMonitorStateException if not synced
812		*/
813		public void testGetWaitingThreadsIMSE() {
814		final Mutex sync = new Mutex();
815	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
815	>	final ConditionObject c = sync.newCondition();
816		try {
817		sync.getWaitingThreads(c);
818		shouldThrow();
819		} catch (IllegalMonitorStateException success) {}
820	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
821		}
822
631	–
632	–
823		/**
824		* hasWaiters returns true when a thread is waiting, else false
825		*/
826	<	public void testHasWaiters() throws InterruptedException {
826	>	public void testHasWaiters() {
827		final Mutex sync = new Mutex();
828	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
829	<	Thread t = new Thread(new CheckedRunnable() {
828	>	final ConditionObject c = sync.newCondition();
829	>	final BooleanLatch acquired = new BooleanLatch();
830	>	Thread t = newStartedThread(new CheckedRunnable() {
831		public void realRun() throws InterruptedException {
832	<	sync.acquire(1);
833	<	threadAssertFalse(sync.hasWaiters(c));
834	<	threadAssertEquals(0, sync.getWaitQueueLength(c));
832	>	sync.acquire();
833	>	assertHasWaitersLocked(sync, c, NO_THREADS);
834	>	assertFalse(sync.hasWaiters(c));
835	>	assertTrue(acquired.releaseShared(0));
836		c.await();
837	<	sync.release(1);
837	>	sync.release();
838		}});
839
840	<	t.start();
841	<	Thread.sleep(SHORT_DELAY_MS);
842	<	sync.acquire(1);
840	>	acquired.acquireShared(0);
841	>	sync.acquire();
842	>	assertHasWaitersLocked(sync, c, t);
843	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
844		assertTrue(sync.hasWaiters(c));
652	–	assertEquals(1, sync.getWaitQueueLength(c));
845		c.signal();
846	<	sync.release(1);
847	<	Thread.sleep(SHORT_DELAY_MS);
656	<	sync.acquire(1);
846	>	assertHasWaitersLocked(sync, c, NO_THREADS);
847	>	assertHasExclusiveQueuedThreads(sync, t);
848		assertFalse(sync.hasWaiters(c));
849	<	assertEquals(0, sync.getWaitQueueLength(c));
850	<	sync.release(1);
851	<	t.join(SHORT_DELAY_MS);
852	<	assertFalse(t.isAlive());
849	>	sync.release();
850	>
851	>	awaitTermination(t);
852	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
853		}
854
855		/**
856		* getWaitQueueLength returns number of waiting threads
857		*/
858	<	public void testGetWaitQueueLength() throws InterruptedException {
858	>	public void testGetWaitQueueLength() {
859		final Mutex sync = new Mutex();
860	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
861	<	Thread t1 = new Thread(new CheckedRunnable() {
860	>	final ConditionObject c = sync.newCondition();
861	>	final BooleanLatch acquired1 = new BooleanLatch();
862	>	final BooleanLatch acquired2 = new BooleanLatch();
863	>	final Thread t1 = newStartedThread(new CheckedRunnable() {
864		public void realRun() throws InterruptedException {
865	<	sync.acquire(1);
866	<	threadAssertFalse(sync.hasWaiters(c));
867	<	threadAssertEquals(0, sync.getWaitQueueLength(c));
865	>	sync.acquire();
866	>	assertHasWaitersLocked(sync, c, NO_THREADS);
867	>	assertEquals(0, sync.getWaitQueueLength(c));
868	>	assertTrue(acquired1.releaseShared(0));
869		c.await();
870	<	sync.release(1);
870	>	sync.release();
871		}});
872	+	acquired1.acquireShared(0);
873	+	sync.acquire();
874	+	assertHasWaitersLocked(sync, c, t1);
875	+	assertEquals(1, sync.getWaitQueueLength(c));
876	+	sync.release();
877
878	<	Thread t2 = new Thread(new CheckedRunnable() {
878	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
879		public void realRun() throws InterruptedException {
880	<	sync.acquire(1);
881	<	threadAssertTrue(sync.hasWaiters(c));
882	<	threadAssertEquals(1, sync.getWaitQueueLength(c));
880	>	sync.acquire();
881	>	assertHasWaitersLocked(sync, c, t1);
882	>	assertEquals(1, sync.getWaitQueueLength(c));
883	>	assertTrue(acquired2.releaseShared(0));
884		c.await();
885	<	sync.release(1);
885	>	sync.release();
886		}});
887	<
888	<	t1.start();
889	<	Thread.sleep(SHORT_DELAY_MS);
890	<	t2.start();
691	<	Thread.sleep(SHORT_DELAY_MS);
692	<	sync.acquire(1);
693	<	assertTrue(sync.hasWaiters(c));
887	>	acquired2.acquireShared(0);
888	>	sync.acquire();
889	>	assertHasWaitersLocked(sync, c, t1, t2);
890	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
891		assertEquals(2, sync.getWaitQueueLength(c));
892		c.signalAll();
893	<	sync.release(1);
894	<	Thread.sleep(SHORT_DELAY_MS);
698	<	sync.acquire(1);
699	<	assertFalse(sync.hasWaiters(c));
893	>	assertHasWaitersLocked(sync, c, NO_THREADS);
894	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
895		assertEquals(0, sync.getWaitQueueLength(c));
896	<	sync.release(1);
897	<	t1.join(SHORT_DELAY_MS);
898	<	t2.join(SHORT_DELAY_MS);
899	<	assertFalse(t1.isAlive());
900	<	assertFalse(t2.isAlive());
896	>	sync.release();
897	>
898	>	awaitTermination(t1);
899	>	awaitTermination(t2);
900	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
901		}
902
903		/**
904		* getWaitingThreads returns only and all waiting threads
905		*/
906	<	public void testGetWaitingThreads() throws InterruptedException {
906	>	public void testGetWaitingThreads() {
907		final Mutex sync = new Mutex();
908	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
909	<	Thread t1 = new Thread(new CheckedRunnable() {
908	>	final ConditionObject c = sync.newCondition();
909	>	final BooleanLatch acquired1 = new BooleanLatch();
910	>	final BooleanLatch acquired2 = new BooleanLatch();
911	>	final Thread t1 = new Thread(new CheckedRunnable() {
912		public void realRun() throws InterruptedException {
913	<	sync.acquire(1);
914	<	threadAssertTrue(sync.getWaitingThreads(c).isEmpty());
913	>	sync.acquire();
914	>	assertHasWaitersLocked(sync, c, NO_THREADS);
915	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
916	>	assertTrue(acquired1.releaseShared(0));
917		c.await();
918	<	sync.release(1);
918	>	sync.release();
919		}});
920
921	<	Thread t2 = new Thread(new CheckedRunnable() {
921	>	final Thread t2 = new Thread(new CheckedRunnable() {
922		public void realRun() throws InterruptedException {
923	<	sync.acquire(1);
924	<	threadAssertFalse(sync.getWaitingThreads(c).isEmpty());
923	>	sync.acquire();
924	>	assertHasWaitersLocked(sync, c, t1);
925	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
926	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
927	>	assertEquals(1, sync.getWaitingThreads(c).size());
928	>	assertTrue(acquired2.releaseShared(0));
929		c.await();
930	<	sync.release(1);
930	>	sync.release();
931		}});
932
933	<	sync.acquire(1);
933	>	sync.acquire();
934	>	assertHasWaitersLocked(sync, c, NO_THREADS);
935	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
936	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
937		assertTrue(sync.getWaitingThreads(c).isEmpty());
938	<	sync.release(1);
938	>	assertEquals(0, sync.getWaitingThreads(c).size());
939	>	sync.release();
940	>
941		t1.start();
942	<	Thread.sleep(SHORT_DELAY_MS);
942	>	acquired1.acquireShared(0);
943	>	sync.acquire();
944	>	assertHasWaitersLocked(sync, c, t1);
945	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
946	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
947	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
948	>	assertEquals(1, sync.getWaitingThreads(c).size());
949	>	sync.release();
950	>
951		t2.start();
952	<	Thread.sleep(SHORT_DELAY_MS);
953	<	sync.acquire(1);
954	<	assertTrue(sync.hasWaiters(c));
952	>	acquired2.acquireShared(0);
953	>	sync.acquire();
954	>	assertHasWaitersLocked(sync, c, t1, t2);
955	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
956		assertTrue(sync.getWaitingThreads(c).contains(t1));
957		assertTrue(sync.getWaitingThreads(c).contains(t2));
958	+	assertFalse(sync.getWaitingThreads(c).isEmpty());
959	+	assertEquals(2, sync.getWaitingThreads(c).size());
960		c.signalAll();
961	<	sync.release(1);
962	<	Thread.sleep(SHORT_DELAY_MS);
963	<	sync.acquire(1);
964	<	assertFalse(sync.hasWaiters(c));
961	>	assertHasWaitersLocked(sync, c, NO_THREADS);
962	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
963	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
964	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
965		assertTrue(sync.getWaitingThreads(c).isEmpty());
966	<	sync.release(1);
967	<	t1.join(SHORT_DELAY_MS);
749	<	t2.join(SHORT_DELAY_MS);
750	<	assertFalse(t1.isAlive());
751	<	assertFalse(t2.isAlive());
752	<	}
753	<
754	<
755	<
756	<	/**
757	<	* awaitUninterruptibly doesn't abort on interrupt
758	<	*/
759	<	public void testAwaitUninterruptibly() throws InterruptedException {
760	<	final Mutex sync = new Mutex();
761	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
762	<	Thread t = new Thread(new CheckedRunnable() {
763	<	public void realRun() {
764	<	sync.acquire(1);
765	<	c.awaitUninterruptibly();
766	<	sync.release(1);
767	<	}});
966	>	assertEquals(0, sync.getWaitingThreads(c).size());
967	>	sync.release();
968
969	<	t.start();
970	<	Thread.sleep(SHORT_DELAY_MS);
971	<	t.interrupt();
772	<	sync.acquire(1);
773	<	c.signal();
774	<	sync.release(1);
775	<	t.join(SHORT_DELAY_MS);
776	<	assertFalse(t.isAlive());
969	>	awaitTermination(t1);
970	>	awaitTermination(t2);
971	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
972		}
973
974		/**
975	<	* await is interruptible
975	>	* awaitUninterruptibly is uninterruptible
976		*/
977	<	public void testAwait_Interrupt() throws InterruptedException {
977	>	public void testAwaitUninterruptibly() {
978		final Mutex sync = new Mutex();
979	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
980	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
981	<	public void realRun() throws InterruptedException {
982	<	sync.acquire(1);
983	<	c.await();
984	<	sync.release(1);
985	<	}});
986	<
987	<	t.start();
988	<	Thread.sleep(SHORT_DELAY_MS);
794	<	t.interrupt();
795	<	t.join(SHORT_DELAY_MS);
796	<	assertFalse(t.isAlive());
797	<	}
798	<
799	<	/**
800	<	* awaitNanos is interruptible
801	<	*/
802	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
803	<	final Mutex sync = new Mutex();
804	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
805	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
806	<	public void realRun() throws InterruptedException {
807	<	sync.acquire(1);
808	<	c.awaitNanos(1000 * 1000 * 1000); // 1 sec
809	<	sync.release(1);
979	>	final ConditionObject condition = sync.newCondition();
980	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
981	>	Thread t = newStartedThread(new CheckedRunnable() {
982	>	public void realRun() {
983	>	sync.acquire();
984	>	assertTrue(pleaseInterrupt.releaseShared(0));
985	>	condition.awaitUninterruptibly();
986	>	assertTrue(Thread.interrupted());
987	>	assertHasWaitersLocked(sync, condition, NO_THREADS);
988	>	sync.release();
989		}});
990
991	<	t.start();
992	<	Thread.sleep(SHORT_DELAY_MS);
991	>	pleaseInterrupt.acquireShared(0);
992	>	sync.acquire();
993	>	assertHasWaitersLocked(sync, condition, t);
994	>	sync.release();
995		t.interrupt();
996	<	t.join(SHORT_DELAY_MS);
997	<	assertFalse(t.isAlive());
996	>	assertHasWaitersUnlocked(sync, condition, t);
997	>	assertThreadBlocks(t, Thread.State.WAITING);
998	>	sync.acquire();
999	>	assertHasWaitersLocked(sync, condition, t);
1000	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1001	>	condition.signal();
1002	>	assertHasWaitersLocked(sync, condition, NO_THREADS);
1003	>	assertHasExclusiveQueuedThreads(sync, t);
1004	>	sync.release();
1005	>	awaitTermination(t);
1006		}
1007
1008		/**
1009	<	* awaitUntil is interruptible
1010	<	*/
1011	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1012	<	final Mutex sync = new Mutex();
1013	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
1014	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1009	>	* await/awaitNanos/awaitUntil is interruptible
1010	>	*/
1011	>	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
1012	>	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
1013	>	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
1014	>	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
1015	>	public void testInterruptible(final AwaitMethod awaitMethod) {
1016	>	final Mutex sync = new Mutex();
1017	>	final ConditionObject c = sync.newCondition();
1018	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
1019	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1020		public void realRun() throws InterruptedException {
1021	<	sync.acquire(1);
1022	<	java.util.Date d = new java.util.Date();
1023	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
830	<	sync.release(1);
1021	>	sync.acquire();
1022	>	assertTrue(pleaseInterrupt.releaseShared(0));
1023	>	await(c, awaitMethod);
1024		}});
1025
1026	<	t.start();
834	<	Thread.sleep(SHORT_DELAY_MS);
1026	>	pleaseInterrupt.acquireShared(0);
1027		t.interrupt();
1028	<	t.join(SHORT_DELAY_MS);
837	<	assertFalse(t.isAlive());
1028	>	awaitTermination(t);
1029		}
1030
1031		/**
1032		* signalAll wakes up all threads
1033		*/
1034	<	public void testSignalAll() throws InterruptedException {
1035	<	final Mutex sync = new Mutex();
1036	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
1037	<	Thread t1 = new Thread(new CheckedRunnable() {
1034	>	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1035	>	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1036	>	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1037	>	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1038	>	public void testSignalAll(final AwaitMethod awaitMethod) {
1039	>	final Mutex sync = new Mutex();
1040	>	final ConditionObject c = sync.newCondition();
1041	>	final BooleanLatch acquired1 = new BooleanLatch();
1042	>	final BooleanLatch acquired2 = new BooleanLatch();
1043	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1044		public void realRun() throws InterruptedException {
1045	<	sync.acquire(1);
1046	<	c.await();
1047	<	sync.release(1);
1045	>	sync.acquire();
1046	>	acquired1.releaseShared(0);
1047	>	await(c, awaitMethod);
1048	>	sync.release();
1049		}});
1050
1051	<	Thread t2 = new Thread(new CheckedRunnable() {
1051	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1052		public void realRun() throws InterruptedException {
1053	<	sync.acquire(1);
1054	<	c.await();
1055	<	sync.release(1);
1053	>	sync.acquire();
1054	>	acquired2.releaseShared(0);
1055	>	await(c, awaitMethod);
1056	>	sync.release();
1057		}});
1058
1059	<	t1.start();
1060	<	t2.start();
1061	<	Thread.sleep(SHORT_DELAY_MS);
1062	<	sync.acquire(1);
1059	>	acquired1.acquireShared(0);
1060	>	acquired2.acquireShared(0);
1061	>	sync.acquire();
1062	>	assertHasWaitersLocked(sync, c, t1, t2);
1063	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1064		c.signalAll();
1065	<	sync.release(1);
1066	<	t1.join(SHORT_DELAY_MS);
1067	<	t2.join(SHORT_DELAY_MS);
1068	<	assertFalse(t1.isAlive());
1069	<	assertFalse(t2.isAlive());
1065	>	assertHasWaitersLocked(sync, c, NO_THREADS);
1066	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
1067	>	sync.release();
1068	>	awaitTermination(t1);
1069	>	awaitTermination(t2);
1070		}
1071
872	–
1072		/**
1073		* toString indicates current state
1074		*/
1075		public void testToString() {
1076		Mutex sync = new Mutex();
1077	<	String us = sync.toString();
1078	<	assertTrue(us.indexOf("State = 0") >= 0);
1079	<	sync.acquire(1);
881	<	String ls = sync.toString();
882	<	assertTrue(ls.indexOf("State = 1") >= 0);
1077	>	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1078	>	sync.acquire();
1079	>	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1080		}
1081
1082		/**
1083	<	* A serialized AQS deserializes with current state
1084	<	*/
1085	<	public void testSerialization() throws Exception {
1086	<	Mutex l = new Mutex();
1087	<	l.acquire(1);
1088	<	assertTrue(l.isHeldExclusively());
1089	<
1090	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1091	<	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	<	}
1083	>	* A serialized AQS deserializes with current state, but no queued threads
1084	>	*/
1085	>	public void testSerialization() {
1086	>	Mutex sync = new Mutex();
1087	>	assertFalse(serialClone(sync).isHeldExclusively());
1088	>	sync.acquire();
1089	>	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1090	>	waitForQueuedThread(sync, t);
1091	>	assertTrue(sync.isHeldExclusively());
1092
1093	+	Mutex clone = serialClone(sync);
1094	+	assertTrue(clone.isHeldExclusively());
1095	+	assertHasExclusiveQueuedThreads(sync, t);
1096	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1097	+	t.interrupt();
1098	+	awaitTermination(t);
1099	+	sync.release();
1100	+	assertFalse(sync.isHeldExclusively());
1101	+	assertTrue(clone.isHeldExclusively());
1102	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1103	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1104	+	}
1105
1106		/**
1107		* tryReleaseShared setting state changes getState
#	Line 908 | Line 1109 | public class AbstractQueuedSynchronizerT
1109		public void testGetStateWithReleaseShared() {
1110		final BooleanLatch l = new BooleanLatch();
1111		assertFalse(l.isSignalled());
1112	<	l.releaseShared(0);
1112	>	assertTrue(l.releaseShared(0));
1113		assertTrue(l.isSignalled());
1114		}
1115
#	Line 918 | Line 1119 | public class AbstractQueuedSynchronizerT
1119		public void testReleaseShared() {
1120		final BooleanLatch l = new BooleanLatch();
1121		assertFalse(l.isSignalled());
1122	<	l.releaseShared(0);
1122	>	assertTrue(l.releaseShared(0));
1123		assertTrue(l.isSignalled());
1124	<	l.releaseShared(0);
1124	>	assertTrue(l.releaseShared(0));
1125		assertTrue(l.isSignalled());
1126		}
1127
1128		/**
1129		* acquireSharedInterruptibly returns after release, but not before
1130		*/
1131	<	public void testAcquireSharedInterruptibly() throws InterruptedException {
1131	>	public void testAcquireSharedInterruptibly() {
1132		final BooleanLatch l = new BooleanLatch();
1133
1134	<	Thread t = new Thread(new CheckedRunnable() {
1134	>	Thread t = newStartedThread(new CheckedRunnable() {
1135		public void realRun() throws InterruptedException {
1136	<	threadAssertFalse(l.isSignalled());
1136	>	assertFalse(l.isSignalled());
1137		l.acquireSharedInterruptibly(0);
1138	<	threadAssertTrue(l.isSignalled());
1138	>	assertTrue(l.isSignalled());
1139	>	l.acquireSharedInterruptibly(0);
1140	>	assertTrue(l.isSignalled());
1141		}});
1142
1143	<	t.start();
1143	>	waitForQueuedThread(l, t);
1144		assertFalse(l.isSignalled());
1145	<	Thread.sleep(SHORT_DELAY_MS);
1146	<	l.releaseShared(0);
1145	>	assertThreadBlocks(t, Thread.State.WAITING);
1146	>	assertHasSharedQueuedThreads(l, t);
1147	>	assertTrue(l.releaseShared(0));
1148		assertTrue(l.isSignalled());
1149	<	t.join();
1149	>	awaitTermination(t);
1150		}
1151
948	–
1152		/**
1153	<	* acquireSharedTimed returns after release
1153	>	* tryAcquireSharedNanos returns after release, but not before
1154		*/
1155	<	public void testAsquireSharedTimed() throws InterruptedException {
1155	>	public void testTryAcquireSharedNanos() {
1156		final BooleanLatch l = new BooleanLatch();
1157
1158	<	Thread t = new Thread(new CheckedRunnable() {
1158	>	Thread t = newStartedThread(new CheckedRunnable() {
1159		public void realRun() throws InterruptedException {
1160	<	threadAssertFalse(l.isSignalled());
1161	<	threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
1162	<	threadAssertTrue(l.isSignalled());
1160	>	assertFalse(l.isSignalled());
1161	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1162	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1163	>	assertTrue(l.isSignalled());
1164	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1165	>	assertTrue(l.isSignalled());
1166		}});
1167
1168	<	t.start();
1168	>	waitForQueuedThread(l, t);
1169		assertFalse(l.isSignalled());
1170	<	Thread.sleep(SHORT_DELAY_MS);
1171	<	l.releaseShared(0);
1170	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
1171	>	assertTrue(l.releaseShared(0));
1172		assertTrue(l.isSignalled());
1173	<	t.join();
1173	>	awaitTermination(t);
1174		}
1175
1176		/**
1177	<	* acquireSharedInterruptibly throws IE if interrupted before released
1177	>	* acquireSharedInterruptibly is interruptible
1178		*/
1179	<	public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException {
1179	>	public void testAcquireSharedInterruptibly_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());
1183	>	assertFalse(l.isSignalled());
1184		l.acquireSharedInterruptibly(0);
1185		}});
1186
1187	<	t.start();
1187	>	waitForQueuedThread(l, t);
1188		assertFalse(l.isSignalled());
1189		t.interrupt();
1190	<	t.join();
1190	>	awaitTermination(t);
1191	>	assertFalse(l.isSignalled());
1192		}
1193
1194		/**
1195	<	* acquireSharedTimed throws IE if interrupted before released
1195	>	* tryAcquireSharedNanos is interruptible
1196		*/
1197	<	public void testAcquireSharedNanos_InterruptedException() throws InterruptedException {
1197	>	public void testTryAcquireSharedNanos_Interruptible() {
1198		final BooleanLatch l = new BooleanLatch();
1199	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1199	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1200		public void realRun() throws InterruptedException {
1201	<	threadAssertFalse(l.isSignalled());
1202	<	l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
1201	>	assertFalse(l.isSignalled());
1202	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1203	>	l.tryAcquireSharedNanos(0, nanos);
1204		}});
1205
1206	<	t.start();
999	<	Thread.sleep(SHORT_DELAY_MS);
1206	>	waitForQueuedThread(l, t);
1207		assertFalse(l.isSignalled());
1208		t.interrupt();
1209	<	t.join();
1209	>	awaitTermination(t);
1210	>	assertFalse(l.isSignalled());
1211		}
1212
1213		/**
1214	<	* acquireSharedTimed times out if not released before timeout
1214	>	* tryAcquireSharedNanos times out if not released before timeout
1215		*/
1216	<	public void testAcquireSharedNanos_Timeout() throws InterruptedException {
1216	>	public void testTryAcquireSharedNanos_Timeout() {
1217		final BooleanLatch l = new BooleanLatch();
1218	<	Thread t = new Thread(new CheckedRunnable() {
1218	>	final BooleanLatch observedQueued = new BooleanLatch();
1219	>	Thread t = newStartedThread(new CheckedRunnable() {
1220		public void realRun() throws InterruptedException {
1221	<	threadAssertFalse(l.isSignalled());
1222	<	threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1221	>	assertFalse(l.isSignalled());
1222	>	for (long millis = timeoutMillis();
1223	>	!observedQueued.isSignalled();
1224	>	millis *= 2) {
1225	>	long nanos = MILLISECONDS.toNanos(millis);
1226	>	long startTime = System.nanoTime();
1227	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1228	>	assertTrue(millisElapsedSince(startTime) >= millis);
1229	>	}
1230	>	assertFalse(l.isSignalled());
1231		}});
1232
1233	<	t.start();
1234	<	Thread.sleep(SHORT_DELAY_MS);
1233	>	waitForQueuedThread(l, t);
1234	>	observedQueued.releaseShared(0);
1235	>	assertFalse(l.isSignalled());
1236	>	awaitTermination(t);
1237		assertFalse(l.isSignalled());
1238	<	t.join();
1238	>	}
1239	>
1240	>	/**
1241	>	* awaitNanos/timed await with 0 wait times out immediately
1242	>	*/
1243	>	public void testAwait_Zero() throws InterruptedException {
1244	>	final Mutex sync = new Mutex();
1245	>	final ConditionObject c = sync.newCondition();
1246	>	sync.acquire();
1247	>	assertTrue(c.awaitNanos(0L) <= 0);
1248	>	assertFalse(c.await(0L, NANOSECONDS));
1249	>	sync.release();
1250	>	}
1251	>
1252	>	/**
1253	>	* awaitNanos/timed await with maximum negative wait times does not underflow
1254	>	*/
1255	>	public void testAwait_NegativeInfinity() throws InterruptedException {
1256	>	final Mutex sync = new Mutex();
1257	>	final ConditionObject c = sync.newCondition();
1258	>	sync.acquire();
1259	>	assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
1260	>	assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
1261	>	sync.release();
1262	>	}
1263	>
1264	>	/**
1265	>	* JDK-8191483: AbstractQueuedSynchronizer cancel/cancel race
1266	>	* ant -Djsr166.tckTestClass=AbstractQueuedSynchronizerTest -Djsr166.methodFilter=testCancelCancelRace -Djsr166.runsPerTest=100 tck
1267	>	*/
1268	>	public void testCancelCancelRace() throws InterruptedException {
1269	>	class Sync extends AbstractQueuedSynchronizer {
1270	>	protected boolean tryAcquire(int acquires) {
1271	>	return !hasQueuedPredecessors() && compareAndSetState(0, 1);
1272	>	}
1273	>	protected boolean tryRelease(int releases) {
1274	>	return compareAndSetState(1, 0);
1275	>	}
1276	>	}
1277	>
1278	>	Sync s = new Sync();
1279	>	s.acquire(1);           // acquire to force other threads to enqueue
1280	>
1281	>	// try to trigger double cancel race with two background threads
1282	>	ArrayList<Thread> threads = new ArrayList<>();
1283	>	Runnable failedAcquire = () -> {
1284	>	try {
1285	>	s.acquireInterruptibly(1);
1286	>	shouldThrow();
1287	>	} catch (InterruptedException expected) {}
1288	>	};
1289	>	for (int i = 0; i < 2; i++) {
1290	>	Thread thread = new Thread(failedAcquire);
1291	>	thread.start();
1292	>	threads.add(thread);
1293	>	}
1294	>	Thread.sleep(100);
1295	>	for (Thread thread : threads) thread.interrupt();
1296	>	for (Thread thread : threads) awaitTermination(thread);
1297	>
1298	>	s.release(1);
1299	>
1300	>	// no one holds lock now, we should be able to acquire
1301	>	if (!s.tryAcquire(1))
1302	>	throw new RuntimeException(
1303	>	String.format(
1304	>	"Broken: hasQueuedPredecessors=%s hasQueuedThreads=%s queueLength=%d firstQueuedThread=%s",
1305	>	s.hasQueuedPredecessors(),
1306	>	s.hasQueuedThreads(),
1307	>	s.getQueueLength(),
1308	>	s.getFirstQueuedThread()));
1309	>	}
1310	>
1311	>	/**
1312	>	* Tests scenario for
1313	>	* JDK-8191937: Lost interrupt in AbstractQueuedSynchronizer when tryAcquire methods throw
1314	>	*/
1315	>	public void testInterruptedFailingAcquire() throws InterruptedException {
1316	>	final RuntimeException ex = new RuntimeException();
1317	>
1318	>	// A synchronizer only offering a choice of failure modes
1319	>	class Sync extends AbstractQueuedSynchronizer {
1320	>	boolean pleaseThrow;
1321	>	@Override protected boolean tryAcquire(int ignored) {
1322	>	if (pleaseThrow) throw ex;
1323	>	return false;
1324	>	}
1325	>	@Override protected int tryAcquireShared(int ignored) {
1326	>	if (pleaseThrow) throw ex;
1327	>	return -1;
1328	>	}
1329	>	@Override protected boolean tryRelease(int ignored) {
1330	>	return true;
1331	>	}
1332	>	@Override protected boolean tryReleaseShared(int ignored) {
1333	>	return true;
1334	>	}
1335	>	}
1336	>
1337	>	final Sync s = new Sync();
1338	>
1339	>	final Thread thread = newStartedThread(new CheckedRunnable() {
1340	>	public void realRun() {
1341	>	try {
1342	>	if (ThreadLocalRandom.current().nextBoolean())
1343	>	s.acquire(1);
1344	>	else
1345	>	s.acquireShared(1);
1346	>	shouldThrow();
1347	>	} catch (Throwable t) {
1348	>	assertSame(ex, t);
1349	>	assertTrue(Thread.interrupted());
1350	>	}
1351	>	}});
1352	>	waitForThreadToEnterWaitState(thread);
1353	>	assertSame(thread, s.getFirstQueuedThread());
1354	>	assertTrue(s.hasQueuedPredecessors());
1355	>	assertTrue(s.hasQueuedThreads());
1356	>	assertEquals(1, s.getQueueLength());
1357	>
1358	>	s.pleaseThrow = true;
1359	>	thread.interrupt();
1360	>	s.release(1);
1361	>	awaitTermination(thread);
1362		}
1363
1364		}

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