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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.27 by jsr166, Wed Nov 18 08:26:24 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	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
11
12	<	import junit.framework.*;
13	<	import java.util.*;
14	<	import java.util.concurrent.*;
15	<	import java.util.concurrent.locks.*;
16	<	import java.io.*;
12	>	import java.util.ArrayList;
13	>	import java.util.Arrays;
14	>	import java.util.Collection;
15	>	import java.util.HashSet;
16	>	import java.util.concurrent.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	>	@Override protected boolean tryAcquire(int acquires) {
57	>	assertEquals(LOCKED, acquires);
58	>	return compareAndSetState(UNLOCKED, LOCKED);
59		}
60
61	<	public boolean tryRelease(int releases) {
62	<	if (getState() == 0) throw new IllegalMonitorStateException();
63	<	setState(0);
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 65 | Line 112 | public class AbstractQueuedSynchronizerT
112		}
113
114		/**
115	<	* A runnable calling acquireInterruptibly
115	>	* A runnable calling acquireInterruptibly that does not expect to
116	>	* be interrupted.
117		*/
118	<	class InterruptibleSyncRunnable implements Runnable {
118	>	class InterruptibleSyncRunnable extends CheckedRunnable {
119		final Mutex sync;
120	<	InterruptibleSyncRunnable(Mutex l) { sync = l; }
121	<	public void run() {
122	<	try {
75	<	sync.acquireInterruptibly(1);
76	<	} catch (InterruptedException success) {}
120	>	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
121	>	public void realRun() throws InterruptedException {
122	>	sync.acquireInterruptibly();
123		}
124		}
125
80	–
126		/**
127		* A runnable calling acquireInterruptibly that expects to be
128	<	* interrupted
128	>	* interrupted.
129		*/
130	<	class InterruptedSyncRunnable implements Runnable {
130	>	class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
131		final Mutex sync;
132	<	InterruptedSyncRunnable(Mutex l) { sync = l; }
133	<	public void run() {
134	<	try {
135	<	sync.acquireInterruptibly(1);
136	<	threadShouldThrow();
137	<	} catch (InterruptedException success) {}
132	>	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
133	>	public void realRun() throws InterruptedException {
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 {
313	<	final Mutex sync = new Mutex();
130	<	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
131	<	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
312	>	public void testHasQueuedThreads() {
313	>	final Mutex sync = new Mutex();
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());
146	–	t1.join();
147	–	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();
334	>	final Mutex sync = new Mutex();
335		try {
336		sync.isQueued(null);
337		shouldThrow();
#	Line 159 | 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 {
345	<	final Mutex sync = new Mutex();
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));
185	–	Thread.sleep(SHORT_DELAY_MS);
366		assertFalse(sync.isQueued(t2));
187	–	t1.join();
188	–	t2.join();
367		}
368
369		/**
370		* getFirstQueuedThread returns first waiting thread or null if none
371		*/
372	<	public void testGetFirstQueuedThread() throws InterruptedException {
373	<	final Mutex sync = new Mutex();
196	<	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
197	<	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
372	>	public void testGetFirstQueuedThread() {
373	>	final Mutex sync = new Mutex();
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);
208	<	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());
213	–	t1.join();
214	–	t2.join();
388		}
389
217	–
390		/**
391		* hasContended reports false if no thread has ever blocked, else true
392		*/
393	<	public void testHasContended() throws InterruptedException {
394	<	final Mutex sync = new Mutex();
223	<	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
224	<	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
393	>	public void testHasContended() {
394	>	final Mutex sync = new Mutex();
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());
239	–	t1.join();
240	–	t2.join();
410		}
411
412		/**
413	<	* getQueuedThreads includes waiting threads
413	>	* getQueuedThreads returns all waiting threads
414		*/
415	<	public void testGetQueuedThreads() throws InterruptedException {
416	<	final Mutex sync = new Mutex();
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);
266	<	assertTrue(sync.getQueuedThreads().isEmpty());
267	<	t1.join();
268	<	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 {
444	<	final Mutex sync = new Mutex();
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);
294	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
295	<	t1.join();
296	<	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 {
472	<	final Mutex sync = new Mutex();
304	<	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
305	<	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
471	>	public void testGetSharedQueuedThreads_Exclusive() {
472	>	final Mutex sync = new Mutex();
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());
321	–	t1.join();
322	–	t2.join();
488		}
489
490		/**
491	<	* tryAcquireNanos is interruptible.
491	>	* getSharedQueuedThreads returns all shared waiting threads
492	>	*/
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 testInterruptedException2() throws InterruptedException {
520	<	final Mutex sync = new Mutex();
521	<	sync.acquire(1);
522	<	Thread t = new Thread(new Runnable() {
523	<	public void run() {
524	<	try {
525	<	sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000 * 1000);
335	<	threadShouldThrow();
336	<	} catch (InterruptedException success) {}
337	<	}
338	<	});
519	>	public void testTryAcquireNanos_Interruptible() {
520	>	final Mutex sync = new Mutex();
521	>	sync.acquire();
522	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
523	>	public void realRun() throws InterruptedException {
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
345	–
532		/**
533	<	* TryAcquire on exclusively held sync fails
533	>	* tryAcquire on exclusively held sync fails
534		*/
535	<	public void testTryAcquireWhenSynced() throws InterruptedException {
536	<	final Mutex sync = new Mutex();
537	<	sync.acquire(1);
538	<	Thread t = new Thread(new Runnable() {
539	<	public void run() {
540	<	threadAssertFalse(sync.tryAcquire(1));
541	<	}
356	<	});
535	>	public void testTryAcquireWhenSynced() {
536	>	final Mutex sync = new Mutex();
537	>	sync.acquire();
538	>	Thread t = newStartedThread(new CheckedRunnable() {
539	>	public void realRun() {
540	>	assertFalse(sync.tryAcquire());
541	>	}});
542
543	<	t.start();
544	<	t.join();
360	<	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 {
551	<	final Mutex sync = new Mutex();
552	<	sync.acquire(1);
553	<	Thread t = new Thread(new Runnable() {
554	<	public void run() {
555	<	try {
556	<	threadAssertFalse(sync.tryAcquireNanos(1, 1000 * 1000));
557	<	} catch (Exception ex) {
558	<	threadUnexpectedException();
559	<	}
376	<	}
377	<	});
378	<
379	<	t.start();
380	<	t.join();
381	<	sync.release(1);
382	<	}
550	>	public void testAcquireNanos_Timeout() {
551	>	final Mutex sync = new Mutex();
552	>	sync.acquire();
553	>	Thread t = newStartedThread(new CheckedRunnable() {
554	>	public void realRun() throws InterruptedException {
555	>	long startTime = System.nanoTime();
556	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
557	>	assertFalse(sync.tryAcquireNanos(nanos));
558	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
559	>	}});
560
561	+	awaitTermination(t);
562	+	sync.release();
563	+	}
564
565		/**
566		* getState is true when acquired and false when not
567		*/
568	<	public void testGetState() throws InterruptedException {
569	<	final Mutex sync = new Mutex();
570	<	sync.acquire(1);
391	<	assertTrue(sync.isHeldExclusively());
392	<	sync.release(1);
393	<	assertFalse(sync.isHeldExclusively());
394	<	Thread t = new Thread(new Runnable() {
395	<	public void run() {
396	<	sync.acquire(1);
397	<	try {
398	<	Thread.sleep(SMALL_DELAY_MS);
399	<	}
400	<	catch (Exception e) {
401	<	threadUnexpectedException();
402	<	}
403	<	sync.release(1);
404	<	}
405	<	});
406	<
407	<	t.start();
408	<	Thread.sleep(SHORT_DELAY_MS);
568	>	public void testGetState() {
569	>	final Mutex sync = new Mutex();
570	>	sync.acquire();
571		assertTrue(sync.isHeldExclusively());
572	<	t.join();
572	>	sync.release();
573		assertFalse(sync.isHeldExclusively());
412	–	}
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();
580	+	assertTrue(acquired.releaseShared(0));
581	+	done.acquireShared(0);
582	+	sync.release();
583	+	}});
584
585	<	/**
586	<	* acquireInterruptibly is interruptible.
587	<	*/
588	<	public void testAcquireInterruptibly1() throws InterruptedException {
589	<	final Mutex sync = new Mutex();
420	<	sync.acquire(1);
421	<	Thread t = new Thread(new InterruptedSyncRunnable(sync));
422	<
423	<	t.start();
424	<	Thread.sleep(SHORT_DELAY_MS);
425	<	t.interrupt();
426	<	Thread.sleep(SHORT_DELAY_MS);
427	<	sync.release(1);
428	<	t.join();
585	>	acquired.acquireShared(0);
586	>	assertTrue(sync.isHeldExclusively());
587	>	assertTrue(done.releaseShared(0));
588	>	awaitTermination(t);
589	>	assertFalse(sync.isHeldExclusively());
590		}
591
592		/**
593		* acquireInterruptibly succeeds when released, else is interruptible
594		*/
595	<	public void testAcquireInterruptibly2() throws InterruptedException {
596	<	final Mutex sync = new Mutex();
597	<	sync.acquireInterruptibly(1);
598	<	Thread t = new Thread(new InterruptedSyncRunnable(sync));
599	<	t.start();
595	>	public void testAcquireInterruptibly() throws InterruptedException {
596	>	final Mutex sync = new Mutex();
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());
441	–	t.join();
610		}
611
612		/**
613		* owns is true for a condition created by sync else false
614		*/
615		public void testOwns() {
616	<	final Mutex sync = new Mutex();
617	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
616	>	final Mutex sync = new Mutex();
617	>	final ConditionObject c = sync.newCondition();
618		final Mutex sync2 = new Mutex();
619		assertTrue(sync.owns(c));
620		assertFalse(sync2.owns(c));
#	Line 455 | Line 623 | public class AbstractQueuedSynchronizerT
623		/**
624		* Calling await without holding sync throws IllegalMonitorStateException
625		*/
626	<	public void testAwait_IllegalMonitor() throws InterruptedException {
627	<	final Mutex sync = new Mutex();
628	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
629	<	try {
630	<	c.await();
631	<	shouldThrow();
626	>	public void testAwait_IMSE() {
627	>	final Mutex sync = new Mutex();
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		}
465	–	catch (IllegalMonitorStateException success) {}
638		}
639
640		/**
641		* Calling signal without holding sync throws IllegalMonitorStateException
642		*/
643	<	public void testSignal_IllegalMonitor() {
644	<	final Mutex sync = new Mutex();
645	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
643	>	public void testSignal_IMSE() {
644	>	final Mutex sync = new Mutex();
645	>	final ConditionObject c = sync.newCondition();
646		try {
647		c.signal();
648		shouldThrow();
649	<	}
650	<	catch (IllegalMonitorStateException success) {}
479	<	}
480	<
481	<	/**
482	<	* awaitNanos without a signal times out
483	<	*/
484	<	public void testAwaitNanos_Timeout() throws InterruptedException {
485	<	final Mutex sync = new Mutex();
486	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
487	<	sync.acquire(1);
488	<	long t = c.awaitNanos(100);
489	<	assertTrue(t <= 0);
490	<	sync.release(1);
649	>	} catch (IllegalMonitorStateException success) {}
650	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
651		}
652
653		/**
654	<	*  Timed await without a signal times out
654	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
655		*/
656	<	public void testAwait_Timeout() throws InterruptedException {
657	<	final Mutex sync = new Mutex();
658	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
659	<	sync.acquire(1);
660	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
661	<	sync.release(1);
656	>	public void testSignalAll_IMSE() {
657	>	final Mutex sync = new Mutex();
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 {
669	<	final Mutex sync = new Mutex();
670	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
671	<	sync.acquire(1);
672	<	java.util.Date d = new java.util.Date();
673	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
674	<	sync.release(1);
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 ConditionObject c = sync.newCondition();
674	>	sync.acquire();
675	>	assertAwaitTimesOut(c, awaitMethod);
676	>	sync.release();
677		}
678
679		/**
680	<	* await returns when signalled
681	<	*/
682	<	public void testAwait() throws InterruptedException {
683	<	final Mutex sync = new Mutex();
684	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
685	<	Thread t = new Thread(new Runnable() {
686	<	public void run() {
687	<	try {
688	<	sync.acquire(1);
689	<	c.await();
690	<	sync.release(1);
691	<	}
692	<	catch (InterruptedException e) {
693	<	threadUnexpectedException();
694	<	}
695	<	}
696	<	});
697	<
698	<	t.start();
699	<	Thread.sleep(SHORT_DELAY_MS);
700	<	sync.acquire(1);
680	>	* await/awaitNanos/awaitUntil returns when signalled
681	>	*/
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 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();
693	>	assertTrue(acquired.releaseShared(0));
694	>	await(c, awaitMethod);
695	>	sync.release();
696	>	}});
697	>
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
544	–
545	–
709		/**
710	<	* hasWaiters throws NPE if null
710	>	* hasWaiters(null) throws NullPointerException
711		*/
712		public void testHasWaitersNPE() {
713	<	final Mutex sync = new Mutex();
713	>	final Mutex sync = new Mutex();
714		try {
715		sync.hasWaiters(null);
716		shouldThrow();
#	Line 555 | 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();
724	>	final Mutex sync = new Mutex();
725		try {
726		sync.getWaitQueueLength(null);
727		shouldThrow();
728		} catch (NullPointerException success) {}
729		}
730
568	–
731		/**
732	<	* getWaitingThreads throws NPE if null
732	>	* getWaitingThreads(null) throws NullPointerException
733		*/
734		public void testGetWaitingThreadsNPE() {
735	<	final Mutex sync = new Mutex();
735	>	final Mutex sync = new Mutex();
736		try {
737		sync.getWaitingThreads(null);
738		shouldThrow();
739		} catch (NullPointerException success) {}
740		}
741
580	–
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();
748	<	final Mutex sync2 = new Mutex();
746	>	final Mutex sync = new Mutex();
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();
760	>	final Mutex sync = new Mutex();
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
606	–
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();
775	<	final Mutex sync2 = new Mutex();
773	>	final Mutex sync = new Mutex();
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();
787	>	final Mutex sync = new Mutex();
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
632	–
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();
802	<	final Mutex sync2 = new Mutex();
800	>	final Mutex sync = new Mutex();
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();
814	>	final Mutex sync = new Mutex();
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
658	–
659	–
823		/**
824		* hasWaiters returns true when a thread is waiting, else false
825		*/
826	<	public void testHasWaiters() throws InterruptedException {
827	<	final Mutex sync = new Mutex();
828	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
829	<	Thread t = new Thread(new Runnable() {
830	<	public void run() {
831	<	try {
832	<	sync.acquire(1);
833	<	threadAssertFalse(sync.hasWaiters(c));
834	<	threadAssertEquals(0, sync.getWaitQueueLength(c));
835	<	c.await();
836	<	sync.release(1);
837	<	}
838	<	catch (InterruptedException e) {
839	<	threadUnexpectedException();
840	<	}
841	<	}
842	<	});
843	<
681	<	t.start();
682	<	Thread.sleep(SHORT_DELAY_MS);
683	<	sync.acquire(1);
826	>	public void testHasWaiters() {
827	>	final Mutex sync = new Mutex();
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();
833	>	assertHasWaitersLocked(sync, c, NO_THREADS);
834	>	assertFalse(sync.hasWaiters(c));
835	>	assertTrue(acquired.releaseShared(0));
836	>	c.await();
837	>	sync.release();
838	>	}});
839	>
840	>	acquired.acquireShared(0);
841	>	sync.acquire();
842	>	assertHasWaitersLocked(sync, c, t);
843	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
844		assertTrue(sync.hasWaiters(c));
685	–	assertEquals(1, sync.getWaitQueueLength(c));
845		c.signal();
846	<	sync.release(1);
847	<	Thread.sleep(SHORT_DELAY_MS);
689	<	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 {
859	<	final Mutex sync = new Mutex();
860	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
861	<	Thread t1 = new Thread(new Runnable() {
862	<	public void run() {
863	<	try {
864	<	sync.acquire(1);
865	<	threadAssertFalse(sync.hasWaiters(c));
866	<	threadAssertEquals(0, sync.getWaitQueueLength(c));
867	<	c.await();
868	<	sync.release(1);
869	<	}
870	<	catch (InterruptedException e) {
871	<	threadUnexpectedException();
872	<	}
873	<	}
874	<	});
875	<
876	<	Thread t2 = new Thread(new Runnable() {
719	<	public void run() {
720	<	try {
721	<	sync.acquire(1);
722	<	threadAssertTrue(sync.hasWaiters(c));
723	<	threadAssertEquals(1, sync.getWaitQueueLength(c));
724	<	c.await();
725	<	sync.release(1);
726	<	}
727	<	catch (InterruptedException e) {
728	<	threadUnexpectedException();
729	<	}
730	<	}
731	<	});
858	>	public void testGetWaitQueueLength() {
859	>	final Mutex sync = new Mutex();
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();
866	>	assertHasWaitersLocked(sync, c, NO_THREADS);
867	>	assertEquals(0, sync.getWaitQueueLength(c));
868	>	assertTrue(acquired1.releaseShared(0));
869	>	c.await();
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	<	t1.start();
879	<	Thread.sleep(SHORT_DELAY_MS);
880	<	t2.start();
881	<	Thread.sleep(SHORT_DELAY_MS);
882	<	sync.acquire(1);
883	<	assertTrue(sync.hasWaiters(c));
878	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
879	>	public void realRun() throws InterruptedException {
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();
886	>	}});
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);
743	<	sync.acquire(1);
744	<	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 {
907	<	final Mutex sync = new Mutex();
908	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
909	<	Thread t1 = new Thread(new Runnable() {
910	<	public void run() {
911	<	try {
912	<	sync.acquire(1);
913	<	threadAssertTrue(sync.getWaitingThreads(c).isEmpty());
914	<	c.await();
915	<	sync.release(1);
916	<	}
917	<	catch (InterruptedException e) {
918	<	threadUnexpectedException();
919	<	}
920	<	}
921	<	});
922	<
923	<	Thread t2 = new Thread(new Runnable() {
924	<	public void run() {
925	<	try {
926	<	sync.acquire(1);
927	<	threadAssertFalse(sync.getWaitingThreads(c).isEmpty());
928	<	c.await();
929	<	sync.release(1);
930	<	}
931	<	catch (InterruptedException e) {
932	<	threadUnexpectedException();
933	<	}
934	<	}
935	<	});
936	<
787	<	sync.acquire(1);
906	>	public void testGetWaitingThreads() {
907	>	final Mutex sync = new Mutex();
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();
914	>	assertHasWaitersLocked(sync, c, NO_THREADS);
915	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
916	>	assertTrue(acquired1.releaseShared(0));
917	>	c.await();
918	>	sync.release();
919	>	}});
920	>
921	>	final Thread t2 = new Thread(new CheckedRunnable() {
922	>	public void realRun() throws InterruptedException {
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();
931	>	}});
932	>
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);
806	<	t2.join(SHORT_DELAY_MS);
807	<	assertFalse(t1.isAlive());
808	<	assertFalse(t2.isAlive());
809	<	}
810	<
966	>	assertEquals(0, sync.getWaitingThreads(c).size());
967	>	sync.release();
968
969	<
970	<	/**
971	<	* awaitUninterruptibly doesn't abort on interrupt
815	<	*/
816	<	public void testAwaitUninterruptibly() throws InterruptedException {
817	<	final Mutex sync = new Mutex();
818	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
819	<	Thread t = new Thread(new Runnable() {
820	<	public void run() {
821	<	sync.acquire(1);
822	<	c.awaitUninterruptibly();
823	<	sync.release(1);
824	<	}
825	<	});
826	<
827	<	t.start();
828	<	Thread.sleep(SHORT_DELAY_MS);
829	<	t.interrupt();
830	<	sync.acquire(1);
831	<	c.signal();
832	<	sync.release(1);
833	<	t.join(SHORT_DELAY_MS);
834	<	assertFalse(t.isAlive());
969	>	awaitTermination(t1);
970	>	awaitTermination(t2);
971	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
972		}
973
974		/**
975	<	* await is interruptible
976	<	*/
977	<	public void testAwait_Interrupt() throws InterruptedException {
978	<	final Mutex sync = new Mutex();
979	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
980	<	Thread t = new Thread(new Runnable() {
981	<	public void run() {
982	<	try {
983	<	sync.acquire(1);
984	<	c.await();
985	<	sync.release(1);
986	<	threadShouldThrow();
987	<	}
988	<	catch (InterruptedException success) {
989	<	}
990	<	}
991	<	});
992	<
993	<	t.start();
994	<	Thread.sleep(SHORT_DELAY_MS);
975	>	* awaitUninterruptibly is uninterruptible
976	>	*/
977	>	public void testAwaitUninterruptibly() {
978	>	final Mutex sync = new Mutex();
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	>	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	<	* awaitNanos is interruptible
1010	<	*/
1011	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
1012	<	final Mutex sync = new Mutex();
1013	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
1014	<	Thread t = new Thread(new Runnable() {
1015	<	public void run() {
1016	<	try {
1017	<	sync.acquire(1);
1018	<	c.awaitNanos(1000 * 1000 * 1000); // 1 sec
1019	<	sync.release(1);
1020	<	threadShouldThrow();
1021	<	}
1022	<	catch (InterruptedException success) {
1023	<	}
1024	<	}
880	<	});
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();
1022	>	assertTrue(pleaseInterrupt.releaseShared(0));
1023	>	await(c, awaitMethod);
1024	>	}});
1025
1026	<	t.start();
883	<	Thread.sleep(SHORT_DELAY_MS);
1026	>	pleaseInterrupt.acquireShared(0);
1027		t.interrupt();
1028	<	t.join(SHORT_DELAY_MS);
886	<	assertFalse(t.isAlive());
887	<	}
888	<
889	<	/**
890	<	* awaitUntil is interruptible
891	<	*/
892	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
893	<	final Mutex sync = new Mutex();
894	<	final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition();
895	<	Thread t = new Thread(new Runnable() {
896	<	public void run() {
897	<	try {
898	<	sync.acquire(1);
899	<	java.util.Date d = new java.util.Date();
900	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
901	<	sync.release(1);
902	<	threadShouldThrow();
903	<	}
904	<	catch (InterruptedException success) {
905	<	}
906	<	}
907	<	});
908	<
909	<	t.start();
910	<	Thread.sleep(SHORT_DELAY_MS);
911	<	t.interrupt();
912	<	t.join(SHORT_DELAY_MS);
913	<	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 Runnable() {
1038	<	public void run() {
1039	<	try {
1040	<	sync.acquire(1);
1041	<	c.await();
1042	<	sync.release(1);
1043	<	}
1044	<	catch (InterruptedException e) {
1045	<	threadUnexpectedException();
1046	<	}
1047	<	}
1048	<	});
1049	<
1050	<	Thread t2 = new Thread(new Runnable() {
1051	<	public void run() {
1052	<	try {
1053	<	sync.acquire(1);
1054	<	c.await();
1055	<	sync.release(1);
1056	<	}
1057	<	catch (InterruptedException e) {
1058	<	threadUnexpectedException();
1059	<	}
1060	<	}
1061	<	});
1062	<
1063	<	t1.start();
949	<	t2.start();
950	<	Thread.sleep(SHORT_DELAY_MS);
951	<	sync.acquire(1);
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();
1046	>	acquired1.releaseShared(0);
1047	>	await(c, awaitMethod);
1048	>	sync.release();
1049	>	}});
1050	>
1051	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1052	>	public void realRun() throws InterruptedException {
1053	>	sync.acquire();
1054	>	acquired2.releaseShared(0);
1055	>	await(c, awaitMethod);
1056	>	sync.release();
1057	>	}});
1058	>
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
960	–
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);
969	<	String ls = sync.toString();
970	<	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));
983	<	out.writeObject(l);
984	<	out.close();
985	<
986	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
987	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
988	<	Mutex r = (Mutex) in.readObject();
989	<	assertTrue(r.isHeldExclusively());
990	<	}
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
1108		*/
1109		public void testGetStateWithReleaseShared() {
1110	<	final BooleanLatch l = new BooleanLatch();
1111	<	assertFalse(l.isSignalled());
1112	<	l.releaseShared(0);
1113	<	assertTrue(l.isSignalled());
1110	>	final BooleanLatch l = new BooleanLatch();
1111	>	assertFalse(l.isSignalled());
1112	>	assertTrue(l.releaseShared(0));
1113	>	assertTrue(l.isSignalled());
1114		}
1115
1116		/**
1117		* releaseShared has no effect when already signalled
1118		*/
1119		public void testReleaseShared() {
1120	<	final BooleanLatch l = new BooleanLatch();
1121	<	assertFalse(l.isSignalled());
1122	<	l.releaseShared(0);
1123	<	assertTrue(l.isSignalled());
1124	<	l.releaseShared(0);
1125	<	assertTrue(l.isSignalled());
1120	>	final BooleanLatch l = new BooleanLatch();
1121	>	assertFalse(l.isSignalled());
1122	>	assertTrue(l.releaseShared(0));
1123	>	assertTrue(l.isSignalled());
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 {
1132	<	final BooleanLatch l = new BooleanLatch();
1131	>	public void testAcquireSharedInterruptibly() {
1132	>	final BooleanLatch l = new BooleanLatch();
1133
1134	<	Thread t = new Thread(new Runnable() {
1135	<	public void run() {
1136	<	try {
1137	<	threadAssertFalse(l.isSignalled());
1138	<	l.acquireSharedInterruptibly(0);
1139	<	threadAssertTrue(l.isSignalled());
1140	<	} catch (InterruptedException e) {
1141	<	threadUnexpectedException();
1029	<	}
1030	<	}
1031	<	});
1134	>	Thread t = newStartedThread(new CheckedRunnable() {
1135	>	public void realRun() throws InterruptedException {
1136	>	assertFalse(l.isSignalled());
1137	>	l.acquireSharedInterruptibly(0);
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
1041	–
1152		/**
1153	<	* acquireSharedTimed returns after release
1153	>	* tryAcquireSharedNanos returns after release, but not before
1154		*/
1155	<	public void testAsquireSharedTimed() throws InterruptedException {
1156	<	final BooleanLatch l = new BooleanLatch();
1047	<
1048	<	Thread t = new Thread(new Runnable() {
1049	<	public void run() {
1050	<	try {
1051	<	threadAssertFalse(l.isSignalled());
1052	<	threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
1053	<	threadAssertTrue(l.isSignalled());
1155	>	public void testTryAcquireSharedNanos() {
1156	>	final BooleanLatch l = new BooleanLatch();
1157
1158	<	} catch (InterruptedException e) {
1159	<	threadUnexpectedException();
1160	<	}
1161	<	}
1162	<	});
1158	>	Thread t = newStartedThread(new CheckedRunnable() {
1159	>	public void realRun() throws InterruptedException {
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 Runnable() {
1182	<	public void run() {
1183	<	try {
1184	<	threadAssertFalse(l.isSignalled());
1185	<	l.acquireSharedInterruptibly(0);
1186	<	threadShouldThrow();
1187	<	} catch (InterruptedException success) {}
1081	<	}
1082	<	});
1083	<	t.start();
1181	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1182	>	public void realRun() throws InterruptedException {
1183	>	assertFalse(l.isSignalled());
1184	>	l.acquireSharedInterruptibly(0);
1185	>	}});
1186	>
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 Runnable() {
1200	<	public void run() {
1201	<	try {
1202	<	threadAssertFalse(l.isSignalled());
1203	<	l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
1204	<	threadShouldThrow();
1205	<	} catch (InterruptedException success) {}
1206	<	}
1102	<	});
1103	<	t.start();
1104	<	Thread.sleep(SHORT_DELAY_MS);
1199	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1200	>	public void realRun() throws InterruptedException {
1201	>	assertFalse(l.isSignalled());
1202	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1203	>	l.tryAcquireSharedNanos(0, nanos);
1204	>	}});
1205	>
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 Runnable() {
1219	<	public void run() {
1220	<	try {
1221	<	threadAssertFalse(l.isSignalled());
1222	<	threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1223	<	} catch (InterruptedException ie) {
1224	<	threadUnexpectedException();
1225	<	}
1218	>	final BooleanLatch observedQueued = new BooleanLatch();
1219	>	Thread t = newStartedThread(new CheckedRunnable() {
1220	>	public void realRun() throws InterruptedException {
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	<	});
1231	<	t.start();
1232	<	Thread.sleep(SHORT_DELAY_MS);
1230	>	assertFalse(l.isSignalled());
1231	>	}});
1232	>
1233	>	waitForQueuedThread(l, t);
1234	>	observedQueued.releaseShared(0);
1235	>	assertFalse(l.isSignalled());
1236	>	awaitTermination(t);
1237		assertFalse(l.isSignalled());
1128	–	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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