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root/jsr166/jsr166/src/test/tck/AbstractQueuedLongSynchronizerTest.java

Comparing jsr166/src/test/tck/AbstractQueuedLongSynchronizerTest.java (file contents):
Revision 1.10 by jsr166, Wed Nov 18 16:04:34 2009 UTC vs.
Revision 1.50 by jsr166, Thu Aug 15 14:56:32 2019 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.Arrays;
13	>	import java.util.Collection;
14	>	import java.util.HashSet;
15	>	import java.util.concurrent.locks.AbstractQueuedLongSynchronizer;
16	>	import java.util.concurrent.locks.AbstractQueuedLongSynchronizer.ConditionObject;
17
18	+	import junit.framework.Test;
19	+	import junit.framework.TestSuite;
20	+
21	+	@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom
22		public class AbstractQueuedLongSynchronizerTest extends JSR166TestCase {
23		public static void main(String[] args) {
24	<	junit.textui.TestRunner.run (suite());
24	>	main(suite(), args);
25		}
26		public static Test suite() {
27		return new TestSuite(AbstractQueuedLongSynchronizerTest.class);
28		}
29
30		/**
31	<	* A simple mutex class, adapted from the
32	<	* AbstractQueuedLongSynchronizer javadoc.  Exclusive acquire tests
33	<	* exercise this as a sample user extension.  Other
34	<	* methods/features of AbstractQueuedLongSynchronizerTest are tested
35	<	* via other test classes, including those for ReentrantLock,
30	<	* ReentrantReadWriteLock, and Semaphore
31	>	* A simple mutex class, adapted from the class javadoc.  Exclusive
32	>	* acquire tests exercise this as a sample user extension.
33	>	*
34	>	* Unlike the javadoc sample, we don't track owner thread via
35	>	* AbstractOwnableSynchronizer methods.
36		*/
37		static class Mutex extends AbstractQueuedLongSynchronizer {
38	<	// Use value > 32 bits for locked state
39	<	static final long LOCKED = 1 << 48;
40	<	public boolean isHeldExclusively() {
41	<	return getState() == LOCKED;
38	>	/** An eccentric value > 32 bits for locked synchronizer state. */
39	>	static final long LOCKED = (1L << 63) | (1L << 15);
40	>
41	>	static final long UNLOCKED = 0;
42	>
43	>	/** Owner thread is untracked, so this is really just isLocked(). */
44	>	@Override public boolean isHeldExclusively() {
45	>	long state = getState();
46	>	assertTrue(state == UNLOCKED || state == LOCKED);
47	>	return state == LOCKED;
48		}
49
50	<	public boolean tryAcquire(long acquires) {
51	<	return compareAndSetState(0, LOCKED);
50	>	@Override protected boolean tryAcquire(long acquires) {
51	>	assertEquals(LOCKED, acquires);
52	>	return compareAndSetState(UNLOCKED, LOCKED);
53		}
54
55	<	public boolean tryRelease(long releases) {
56	<	if (getState() == 0) throw new IllegalMonitorStateException();
57	<	setState(0);
55	>	@Override protected boolean tryRelease(long releases) {
56	>	if (getState() != LOCKED) throw new IllegalMonitorStateException();
57	>	setState(UNLOCKED);
58		return true;
59		}
60
61	<	public AbstractQueuedLongSynchronizer.ConditionObject newCondition() { return new AbstractQueuedLongSynchronizer.ConditionObject(); }
61	>	public boolean tryAcquireNanos(long nanos) throws InterruptedException {
62	>	return tryAcquireNanos(LOCKED, nanos);
63	>	}
64
65	<	}
65	>	public boolean tryAcquire() {
66	>	return tryAcquire(LOCKED);
67	>	}
68	>
69	>	public boolean tryRelease() {
70	>	return tryRelease(LOCKED);
71	>	}
72	>
73	>	public void acquire() {
74	>	acquire(LOCKED);
75	>	}
76	>
77	>	public void acquireInterruptibly() throws InterruptedException {
78	>	acquireInterruptibly(LOCKED);
79	>	}
80	>
81	>	public void release() {
82	>	release(LOCKED);
83	>	}
84
85	+	/** Faux-Implements Lock.newCondition(). */
86	+	public ConditionObject newCondition() {
87	+	return new ConditionObject();
88	+	}
89	+	}
90
91		/**
92	<	* A simple latch class, to test shared mode.
92	>	* A minimal latch class, to test shared mode.
93		*/
94		static class BooleanLatch extends AbstractQueuedLongSynchronizer {
95		public boolean isSignalled() { return getState() != 0; }
96
97		public long tryAcquireShared(long ignore) {
98	<	return isSignalled()? 1 : -1;
98	>	return isSignalled() ? 1 : -1;
99		}
100
101		public boolean tryReleaseShared(long ignore) {
102	<	setState(1 << 62);
102	>	setState(1L << 62);
103		return true;
104		}
105		}
#	Line 73 | Line 110 | public class AbstractQueuedLongSynchroni
110		*/
111		class InterruptibleSyncRunnable extends CheckedRunnable {
112		final Mutex sync;
113	<	InterruptibleSyncRunnable(Mutex l) { sync = l; }
113	>	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
114		public void realRun() throws InterruptedException {
115	<	sync.acquireInterruptibly(1);
115	>	sync.acquireInterruptibly();
116		}
117		}
118
82	–
119		/**
120		* A runnable calling acquireInterruptibly that expects to be
121		* interrupted.
122		*/
123		class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
124		final Mutex sync;
125	<	InterruptedSyncRunnable(Mutex l) { sync = l; }
125	>	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
126		public void realRun() throws InterruptedException {
127	<	sync.acquireInterruptibly(1);
127	>	sync.acquireInterruptibly();
128	>	}
129	>	}
130	>
131	>	/** A constant to clarify calls to checking methods below. */
132	>	static final Thread[] NO_THREADS = new Thread[0];
133	>
134	>	/**
135	>	* Spin-waits until sync.isQueued(t) becomes true.
136	>	*/
137	>	void waitForQueuedThread(AbstractQueuedLongSynchronizer sync,
138	>	Thread t) {
139	>	long startTime = System.nanoTime();
140	>	while (!sync.isQueued(t)) {
141	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
142	>	throw new AssertionError("timed out");
143	>	Thread.yield();
144	>	}
145	>	assertTrue(t.isAlive());
146	>	}
147	>
148	>	/**
149	>	* Checks that sync has exactly the given queued threads.
150	>	*/
151	>	void assertHasQueuedThreads(AbstractQueuedLongSynchronizer sync,
152	>	Thread... expected) {
153	>	Collection<Thread> actual = sync.getQueuedThreads();
154	>	assertEquals(expected.length > 0, sync.hasQueuedThreads());
155	>	assertEquals(expected.length, sync.getQueueLength());
156	>	assertEquals(expected.length, actual.size());
157	>	assertEquals(expected.length == 0, actual.isEmpty());
158	>	assertEquals(new HashSet<Thread>(actual),
159	>	new HashSet<Thread>(Arrays.asList(expected)));
160	>	}
161	>
162	>	/**
163	>	* Checks that sync has exactly the given (exclusive) queued threads.
164	>	*/
165	>	void assertHasExclusiveQueuedThreads(AbstractQueuedLongSynchronizer sync,
166	>	Thread... expected) {
167	>	assertHasQueuedThreads(sync, expected);
168	>	assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()),
169	>	new HashSet<Thread>(sync.getQueuedThreads()));
170	>	assertEquals(0, sync.getSharedQueuedThreads().size());
171	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
172	>	}
173	>
174	>	/**
175	>	* Checks that sync has exactly the given (shared) queued threads.
176	>	*/
177	>	void assertHasSharedQueuedThreads(AbstractQueuedLongSynchronizer sync,
178	>	Thread... expected) {
179	>	assertHasQueuedThreads(sync, expected);
180	>	assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()),
181	>	new HashSet<Thread>(sync.getQueuedThreads()));
182	>	assertEquals(0, sync.getExclusiveQueuedThreads().size());
183	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
184	>	}
185	>
186	>	/**
187	>	* Checks that condition c has exactly the given waiter threads,
188	>	* after acquiring mutex.
189	>	*/
190	>	void assertHasWaitersUnlocked(Mutex sync, ConditionObject c,
191	>	Thread... threads) {
192	>	sync.acquire();
193	>	assertHasWaitersLocked(sync, c, threads);
194	>	sync.release();
195	>	}
196	>
197	>	/**
198	>	* Checks that condition c has exactly the given waiter threads.
199	>	*/
200	>	void assertHasWaitersLocked(Mutex sync, ConditionObject c,
201	>	Thread... threads) {
202	>	assertEquals(threads.length > 0, sync.hasWaiters(c));
203	>	assertEquals(threads.length, sync.getWaitQueueLength(c));
204	>	assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty());
205	>	assertEquals(threads.length, sync.getWaitingThreads(c).size());
206	>	assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)),
207	>	new HashSet<Thread>(Arrays.asList(threads)));
208	>	}
209	>
210	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
211	>
212	>	/**
213	>	* Awaits condition using the specified AwaitMethod.
214	>	*/
215	>	void await(ConditionObject c, AwaitMethod awaitMethod)
216	>	throws InterruptedException {
217	>	long timeoutMillis = 2 * LONG_DELAY_MS;
218	>	switch (awaitMethod) {
219	>	case await:
220	>	c.await();
221	>	break;
222	>	case awaitTimed:
223	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
224	>	break;
225	>	case awaitNanos:
226	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
227	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
228	>	assertTrue(nanosRemaining > 0);
229	>	break;
230	>	case awaitUntil:
231	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
232	>	break;
233	>	default:
234	>	throw new AssertionError();
235		}
236		}
237
238		/**
239	+	* Checks that awaiting the given condition times out (using the
240	+	* default timeout duration).
241	+	*/
242	+	void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
243	+	final long timeoutMillis = timeoutMillis();
244	+	final long startTime;
245	+	try {
246	+	switch (awaitMethod) {
247	+	case awaitTimed:
248	+	startTime = System.nanoTime();
249	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
250	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
251	+	break;
252	+	case awaitNanos:
253	+	startTime = System.nanoTime();
254	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
255	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
256	+	assertTrue(nanosRemaining <= 0);
257	+	assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS));
258	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
259	+	break;
260	+	case awaitUntil:
261	+	// We shouldn't assume that nanoTime and currentTimeMillis
262	+	// use the same time source, so don't use nanoTime here.
263	+	java.util.Date delayedDate = delayedDate(timeoutMillis);
264	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
265	+	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
266	+	break;
267	+	default:
268	+	throw new UnsupportedOperationException();
269	+	}
270	+	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
271	+	}
272	+
273	+	/**
274		* isHeldExclusively is false upon construction
275		*/
276		public void testIsHeldExclusively() {
277	<	Mutex rl = new Mutex();
278	<	assertFalse(rl.isHeldExclusively());
277	>	Mutex sync = new Mutex();
278	>	assertFalse(sync.isHeldExclusively());
279		}
280
281		/**
282		* acquiring released sync succeeds
283		*/
284		public void testAcquire() {
285	<	Mutex rl = new Mutex();
286	<	rl.acquire(1);
287	<	assertTrue(rl.isHeldExclusively());
288	<	rl.release(1);
289	<	assertFalse(rl.isHeldExclusively());
285	>	Mutex sync = new Mutex();
286	>	sync.acquire();
287	>	assertTrue(sync.isHeldExclusively());
288	>	sync.release();
289	>	assertFalse(sync.isHeldExclusively());
290		}
291
292		/**
293	<	* tryAcquire on an released sync succeeds
293	>	* tryAcquire on a released sync succeeds
294		*/
295		public void testTryAcquire() {
296	<	Mutex rl = new Mutex();
297	<	assertTrue(rl.tryAcquire(1));
298	<	assertTrue(rl.isHeldExclusively());
299	<	rl.release(1);
296	>	Mutex sync = new Mutex();
297	>	assertTrue(sync.tryAcquire());
298	>	assertTrue(sync.isHeldExclusively());
299	>	sync.release();
300	>	assertFalse(sync.isHeldExclusively());
301		}
302
303		/**
304		* hasQueuedThreads reports whether there are waiting threads
305		*/
306	<	public void testhasQueuedThreads() throws InterruptedException {
307	<	final Mutex sync = new Mutex();
129	<	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
130	<	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
306	>	public void testHasQueuedThreads() {
307	>	final Mutex sync = new Mutex();
308		assertFalse(sync.hasQueuedThreads());
309	<	sync.acquire(1);
310	<	t1.start();
311	<	Thread.sleep(SHORT_DELAY_MS);
309	>	sync.acquire();
310	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
311	>	waitForQueuedThread(sync, t1);
312		assertTrue(sync.hasQueuedThreads());
313	<	t2.start();
314	<	Thread.sleep(SHORT_DELAY_MS);
313	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
314	>	waitForQueuedThread(sync, t2);
315		assertTrue(sync.hasQueuedThreads());
316		t1.interrupt();
317	<	Thread.sleep(SHORT_DELAY_MS);
317	>	awaitTermination(t1);
318		assertTrue(sync.hasQueuedThreads());
319	<	sync.release(1);
320	<	Thread.sleep(SHORT_DELAY_MS);
319	>	sync.release();
320	>	awaitTermination(t2);
321		assertFalse(sync.hasQueuedThreads());
145	–	t1.join();
146	–	t2.join();
322		}
323
324		/**
325	<	* isQueued(null) throws NPE
325	>	* isQueued(null) throws NullPointerException
326		*/
327		public void testIsQueuedNPE() {
328	<	final Mutex sync = new Mutex();
328	>	final Mutex sync = new Mutex();
329		try {
330		sync.isQueued(null);
331		shouldThrow();
#	Line 158 | Line 333 | public class AbstractQueuedLongSynchroni
333		}
334
335		/**
336	<	* isQueued reports whether a thread is queued.
336	>	* isQueued reports whether a thread is queued
337		*/
338	<	public void testIsQueued() throws InterruptedException {
339	<	final Mutex sync = new Mutex();
338	>	public void testIsQueued() {
339	>	final Mutex sync = new Mutex();
340		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
341		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
342		assertFalse(sync.isQueued(t1));
343		assertFalse(sync.isQueued(t2));
344	<	sync.acquire(1);
344	>	sync.acquire();
345		t1.start();
346	<	Thread.sleep(SHORT_DELAY_MS);
346	>	waitForQueuedThread(sync, t1);
347		assertTrue(sync.isQueued(t1));
348	+	assertFalse(sync.isQueued(t2));
349		t2.start();
350	<	Thread.sleep(SHORT_DELAY_MS);
350	>	waitForQueuedThread(sync, t2);
351		assertTrue(sync.isQueued(t1));
352		assertTrue(sync.isQueued(t2));
353		t1.interrupt();
354	<	Thread.sleep(SHORT_DELAY_MS);
354	>	awaitTermination(t1);
355		assertFalse(sync.isQueued(t1));
356		assertTrue(sync.isQueued(t2));
357	<	sync.release(1);
358	<	Thread.sleep(SHORT_DELAY_MS);
357	>	sync.release();
358	>	awaitTermination(t2);
359		assertFalse(sync.isQueued(t1));
184	–	Thread.sleep(SHORT_DELAY_MS);
360		assertFalse(sync.isQueued(t2));
186	–	t1.join();
187	–	t2.join();
361		}
362
363		/**
364		* getFirstQueuedThread returns first waiting thread or null if none
365		*/
366	<	public void testGetFirstQueuedThread() throws InterruptedException {
367	<	final Mutex sync = new Mutex();
195	<	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
196	<	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
366	>	public void testGetFirstQueuedThread() {
367	>	final Mutex sync = new Mutex();
368		assertNull(sync.getFirstQueuedThread());
369	<	sync.acquire(1);
370	<	t1.start();
371	<	Thread.sleep(SHORT_DELAY_MS);
369	>	sync.acquire();
370	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
371	>	waitForQueuedThread(sync, t1);
372		assertEquals(t1, sync.getFirstQueuedThread());
373	<	t2.start();
374	<	Thread.sleep(SHORT_DELAY_MS);
373	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
374	>	waitForQueuedThread(sync, t2);
375		assertEquals(t1, sync.getFirstQueuedThread());
376		t1.interrupt();
377	<	Thread.sleep(SHORT_DELAY_MS);
207	<	Thread.sleep(SHORT_DELAY_MS);
377	>	awaitTermination(t1);
378		assertEquals(t2, sync.getFirstQueuedThread());
379	<	sync.release(1);
380	<	Thread.sleep(SHORT_DELAY_MS);
379	>	sync.release();
380	>	awaitTermination(t2);
381		assertNull(sync.getFirstQueuedThread());
212	–	t1.join();
213	–	t2.join();
382		}
383
216	–
384		/**
385		* hasContended reports false if no thread has ever blocked, else true
386		*/
387	<	public void testHasContended() throws InterruptedException {
388	<	final Mutex sync = new Mutex();
222	<	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
223	<	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
387	>	public void testHasContended() {
388	>	final Mutex sync = new Mutex();
389		assertFalse(sync.hasContended());
390	<	sync.acquire(1);
391	<	t1.start();
392	<	Thread.sleep(SHORT_DELAY_MS);
390	>	sync.acquire();
391	>	assertFalse(sync.hasContended());
392	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
393	>	waitForQueuedThread(sync, t1);
394		assertTrue(sync.hasContended());
395	<	t2.start();
396	<	Thread.sleep(SHORT_DELAY_MS);
395	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
396	>	waitForQueuedThread(sync, t2);
397		assertTrue(sync.hasContended());
398		t1.interrupt();
399	<	Thread.sleep(SHORT_DELAY_MS);
399	>	awaitTermination(t1);
400		assertTrue(sync.hasContended());
401	<	sync.release(1);
402	<	Thread.sleep(SHORT_DELAY_MS);
401	>	sync.release();
402	>	awaitTermination(t2);
403		assertTrue(sync.hasContended());
238	–	t1.join();
239	–	t2.join();
404		}
405
406		/**
407	<	* getQueuedThreads includes waiting threads
407	>	* getQueuedThreads returns all waiting threads
408		*/
409	<	public void testGetQueuedThreads() throws InterruptedException {
410	<	final Mutex sync = new Mutex();
409	>	public void testGetQueuedThreads() {
410	>	final Mutex sync = new Mutex();
411		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
412		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
413	<	assertTrue(sync.getQueuedThreads().isEmpty());
414	<	sync.acquire(1);
415	<	assertTrue(sync.getQueuedThreads().isEmpty());
413	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
414	>	sync.acquire();
415	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
416		t1.start();
417	<	Thread.sleep(SHORT_DELAY_MS);
417	>	waitForQueuedThread(sync, t1);
418	>	assertHasExclusiveQueuedThreads(sync, t1);
419		assertTrue(sync.getQueuedThreads().contains(t1));
420	+	assertFalse(sync.getQueuedThreads().contains(t2));
421		t2.start();
422	<	Thread.sleep(SHORT_DELAY_MS);
422	>	waitForQueuedThread(sync, t2);
423	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
424		assertTrue(sync.getQueuedThreads().contains(t1));
425		assertTrue(sync.getQueuedThreads().contains(t2));
426		t1.interrupt();
427	<	Thread.sleep(SHORT_DELAY_MS);
428	<	assertFalse(sync.getQueuedThreads().contains(t1));
429	<	assertTrue(sync.getQueuedThreads().contains(t2));
430	<	sync.release(1);
431	<	Thread.sleep(SHORT_DELAY_MS);
265	<	assertTrue(sync.getQueuedThreads().isEmpty());
266	<	t1.join();
267	<	t2.join();
427	>	awaitTermination(t1);
428	>	assertHasExclusiveQueuedThreads(sync, t2);
429	>	sync.release();
430	>	awaitTermination(t2);
431	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
432		}
433
434		/**
435	<	* getExclusiveQueuedThreads includes waiting threads
435	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
436		*/
437	<	public void testGetExclusiveQueuedThreads() throws InterruptedException {
438	<	final Mutex sync = new Mutex();
437	>	public void testGetExclusiveQueuedThreads() {
438	>	final Mutex sync = new Mutex();
439		Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
440		Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
441	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
442	<	sync.acquire(1);
443	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
441	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
442	>	sync.acquire();
443	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
444		t1.start();
445	<	Thread.sleep(SHORT_DELAY_MS);
445	>	waitForQueuedThread(sync, t1);
446	>	assertHasExclusiveQueuedThreads(sync, t1);
447		assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
448	+	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
449		t2.start();
450	<	Thread.sleep(SHORT_DELAY_MS);
450	>	waitForQueuedThread(sync, t2);
451	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
452		assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
453		assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
454		t1.interrupt();
455	<	Thread.sleep(SHORT_DELAY_MS);
456	<	assertFalse(sync.getExclusiveQueuedThreads().contains(t1));
457	<	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
458	<	sync.release(1);
459	<	Thread.sleep(SHORT_DELAY_MS);
293	<	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
294	<	t1.join();
295	<	t2.join();
455	>	awaitTermination(t1);
456	>	assertHasExclusiveQueuedThreads(sync, t2);
457	>	sync.release();
458	>	awaitTermination(t2);
459	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
460		}
461
462		/**
463		* getSharedQueuedThreads does not include exclusively waiting threads
464		*/
465	<	public void testGetSharedQueuedThreads() throws InterruptedException {
466	<	final Mutex sync = new Mutex();
303	<	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
304	<	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
465	>	public void testGetSharedQueuedThreads_Exclusive() {
466	>	final Mutex sync = new Mutex();
467		assertTrue(sync.getSharedQueuedThreads().isEmpty());
468	<	sync.acquire(1);
468	>	sync.acquire();
469		assertTrue(sync.getSharedQueuedThreads().isEmpty());
470	<	t1.start();
471	<	Thread.sleep(SHORT_DELAY_MS);
470	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
471	>	waitForQueuedThread(sync, t1);
472		assertTrue(sync.getSharedQueuedThreads().isEmpty());
473	<	t2.start();
474	<	Thread.sleep(SHORT_DELAY_MS);
473	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
474	>	waitForQueuedThread(sync, t2);
475		assertTrue(sync.getSharedQueuedThreads().isEmpty());
476		t1.interrupt();
477	<	Thread.sleep(SHORT_DELAY_MS);
477	>	awaitTermination(t1);
478		assertTrue(sync.getSharedQueuedThreads().isEmpty());
479	<	sync.release(1);
480	<	Thread.sleep(SHORT_DELAY_MS);
479	>	sync.release();
480	>	awaitTermination(t2);
481		assertTrue(sync.getSharedQueuedThreads().isEmpty());
320	–	t1.join();
321	–	t2.join();
482		}
483
484		/**
485	<	* tryAcquireNanos is interruptible.
485	>	* getSharedQueuedThreads returns all shared waiting threads
486	>	*/
487	>	public void testGetSharedQueuedThreads_Shared() {
488	>	final BooleanLatch l = new BooleanLatch();
489	>	assertHasSharedQueuedThreads(l, NO_THREADS);
490	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
491	>	public void realRun() throws InterruptedException {
492	>	l.acquireSharedInterruptibly(0);
493	>	}});
494	>	waitForQueuedThread(l, t1);
495	>	assertHasSharedQueuedThreads(l, t1);
496	>	Thread t2 = newStartedThread(new CheckedRunnable() {
497	>	public void realRun() throws InterruptedException {
498	>	l.acquireSharedInterruptibly(0);
499	>	}});
500	>	waitForQueuedThread(l, t2);
501	>	assertHasSharedQueuedThreads(l, t1, t2);
502	>	t1.interrupt();
503	>	awaitTermination(t1);
504	>	assertHasSharedQueuedThreads(l, t2);
505	>	assertTrue(l.releaseShared(0));
506	>	awaitTermination(t2);
507	>	assertHasSharedQueuedThreads(l, NO_THREADS);
508	>	}
509	>
510	>	/**
511	>	* tryAcquireNanos is interruptible
512		*/
513	<	public void testInterruptedException2() throws InterruptedException {
514	<	final Mutex sync = new Mutex();
515	<	sync.acquire(1);
516	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
513	>	public void testTryAcquireNanos_Interruptible() {
514	>	final Mutex sync = new Mutex();
515	>	sync.acquire();
516	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
517		public void realRun() throws InterruptedException {
518	<	sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000 * 1000);
518	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
519		}});
520
521	<	t.start();
521	>	waitForQueuedThread(sync, t);
522		t.interrupt();
523	<	t.join();
523	>	awaitTermination(t);
524		}
525
340	–
526		/**
527	<	* TryAcquire on exclusively held sync fails
527	>	* tryAcquire on exclusively held sync fails
528		*/
529	<	public void testTryAcquireWhenSynced() throws InterruptedException {
530	<	final Mutex sync = new Mutex();
531	<	sync.acquire(1);
532	<	Thread t = new Thread(new CheckedRunnable() {
529	>	public void testTryAcquireWhenSynced() {
530	>	final Mutex sync = new Mutex();
531	>	sync.acquire();
532	>	Thread t = newStartedThread(new CheckedRunnable() {
533		public void realRun() {
534	<	threadAssertFalse(sync.tryAcquire(1));
534	>	assertFalse(sync.tryAcquire());
535		}});
536
537	<	t.start();
538	<	t.join();
354	<	sync.release(1);
537	>	awaitTermination(t);
538	>	sync.release();
539		}
540
541		/**
542		* tryAcquireNanos on an exclusively held sync times out
543		*/
544	<	public void testAcquireNanos_Timeout() throws InterruptedException {
545	<	final Mutex sync = new Mutex();
546	<	sync.acquire(1);
547	<	Thread t = new Thread(new CheckedRunnable() {
544	>	public void testAcquireNanos_Timeout() {
545	>	final Mutex sync = new Mutex();
546	>	sync.acquire();
547	>	Thread t = newStartedThread(new CheckedRunnable() {
548		public void realRun() throws InterruptedException {
549	<	threadAssertFalse(sync.tryAcquireNanos(1, 1000 * 1000));
549	>	long startTime = System.nanoTime();
550	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
551	>	assertFalse(sync.tryAcquireNanos(nanos));
552	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
553		}});
554
555	<	t.start();
556	<	t.join();
370	<	sync.release(1);
555	>	awaitTermination(t);
556	>	sync.release();
557		}
558
373	–
559		/**
560		* getState is true when acquired and false when not
561		*/
562	<	public void testGetState() throws InterruptedException {
563	<	final Mutex sync = new Mutex();
564	<	sync.acquire(1);
380	<	assertTrue(sync.isHeldExclusively());
381	<	sync.release(1);
382	<	assertFalse(sync.isHeldExclusively());
383	<	Thread t = new Thread(new CheckedRunnable() {
384	<	public void realRun() throws InterruptedException {
385	<	sync.acquire(1);
386	<	Thread.sleep(SMALL_DELAY_MS);
387	<	sync.release(1);
388	<	}});
389	<
390	<	t.start();
391	<	Thread.sleep(SHORT_DELAY_MS);
562	>	public void testGetState() {
563	>	final Mutex sync = new Mutex();
564	>	sync.acquire();
565		assertTrue(sync.isHeldExclusively());
566	<	t.join();
566	>	sync.release();
567		assertFalse(sync.isHeldExclusively());
395	–	}
568
569	+	final BooleanLatch acquired = new BooleanLatch();
570	+	final BooleanLatch done = new BooleanLatch();
571	+	Thread t = newStartedThread(new CheckedRunnable() {
572	+	public void realRun() throws InterruptedException {
573	+	sync.acquire();
574	+	assertTrue(acquired.releaseShared(0));
575	+	done.acquireShared(0);
576	+	sync.release();
577	+	}});
578
579	<	/**
580	<	* acquireInterruptibly is interruptible.
581	<	*/
582	<	public void testAcquireInterruptibly1() throws InterruptedException {
583	<	final Mutex sync = new Mutex();
403	<	sync.acquire(1);
404	<	Thread t = new Thread(new InterruptedSyncRunnable(sync));
405	<	t.start();
406	<	Thread.sleep(SHORT_DELAY_MS);
407	<	t.interrupt();
408	<	Thread.sleep(SHORT_DELAY_MS);
409	<	sync.release(1);
410	<	t.join();
579	>	acquired.acquireShared(0);
580	>	assertTrue(sync.isHeldExclusively());
581	>	assertTrue(done.releaseShared(0));
582	>	awaitTermination(t);
583	>	assertFalse(sync.isHeldExclusively());
584		}
585
586		/**
587		* acquireInterruptibly succeeds when released, else is interruptible
588		*/
589	<	public void testAcquireInterruptibly2() throws InterruptedException {
590	<	final Mutex sync = new Mutex();
591	<	sync.acquireInterruptibly(1);
592	<	Thread t = new Thread(new InterruptedSyncRunnable(sync));
593	<	t.start();
589	>	public void testAcquireInterruptibly() throws InterruptedException {
590	>	final Mutex sync = new Mutex();
591	>	final BooleanLatch threadStarted = new BooleanLatch();
592	>	sync.acquireInterruptibly();
593	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
594	>	public void realRun() throws InterruptedException {
595	>	assertTrue(threadStarted.releaseShared(0));
596	>	sync.acquireInterruptibly();
597	>	}});
598	>
599	>	threadStarted.acquireShared(0);
600	>	waitForQueuedThread(sync, t);
601		t.interrupt();
602	+	awaitTermination(t);
603		assertTrue(sync.isHeldExclusively());
423	–	t.join();
604		}
605
606		/**
607		* owns is true for a condition created by sync else false
608		*/
609		public void testOwns() {
610	<	final Mutex sync = new Mutex();
611	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
610	>	final Mutex sync = new Mutex();
611	>	final ConditionObject c = sync.newCondition();
612		final Mutex sync2 = new Mutex();
613		assertTrue(sync.owns(c));
614		assertFalse(sync2.owns(c));
#	Line 437 | Line 617 | public class AbstractQueuedLongSynchroni
617		/**
618		* Calling await without holding sync throws IllegalMonitorStateException
619		*/
620	<	public void testAwait_IllegalMonitor() throws InterruptedException {
621	<	final Mutex sync = new Mutex();
622	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
623	<	try {
624	<	c.await();
625	<	shouldThrow();
626	<	} catch (IllegalMonitorStateException success) {}
620	>	public void testAwait_IMSE() {
621	>	final Mutex sync = new Mutex();
622	>	final ConditionObject c = sync.newCondition();
623	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
624	>	long startTime = System.nanoTime();
625	>	try {
626	>	await(c, awaitMethod);
627	>	shouldThrow();
628	>	} catch (IllegalMonitorStateException success) {
629	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
630	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
631	>	}
632		}
633
634		/**
635		* Calling signal without holding sync throws IllegalMonitorStateException
636		*/
637	<	public void testSignal_IllegalMonitor() throws InterruptedException {
638	<	final Mutex sync = new Mutex();
639	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
637	>	public void testSignal_IMSE() {
638	>	final Mutex sync = new Mutex();
639	>	final ConditionObject c = sync.newCondition();
640		try {
641		c.signal();
642		shouldThrow();
643		} catch (IllegalMonitorStateException success) {}
644	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
645		}
646
647		/**
648	<	* awaitNanos without a signal times out
648	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
649		*/
650	<	public void testAwaitNanos_Timeout() throws InterruptedException {
651	<	final Mutex sync = new Mutex();
652	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
653	<	sync.acquire(1);
654	<	long t = c.awaitNanos(100);
655	<	assertTrue(t <= 0);
656	<	sync.release(1);
471	<	}
472	<
473	<	/**
474	<	*  Timed await without a signal times out
475	<	*/
476	<	public void testAwait_Timeout() throws InterruptedException {
477	<	final Mutex sync = new Mutex();
478	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
479	<	sync.acquire(1);
480	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
481	<	sync.release(1);
650	>	public void testSignalAll_IMSE() {
651	>	final Mutex sync = new Mutex();
652	>	final ConditionObject c = sync.newCondition();
653	>	try {
654	>	c.signalAll();
655	>	shouldThrow();
656	>	} catch (IllegalMonitorStateException success) {}
657		}
658
659		/**
660	<	* awaitUntil without a signal times out
660	>	* await/awaitNanos/awaitUntil without a signal times out
661		*/
662	<	public void testAwaitUntil_Timeout() throws InterruptedException {
663	<	final Mutex sync = new Mutex();
664	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
665	<	sync.acquire(1);
666	<	java.util.Date d = new java.util.Date();
667	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
668	<	sync.release(1);
662	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
663	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
664	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
665	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
666	>	final Mutex sync = new Mutex();
667	>	final ConditionObject c = sync.newCondition();
668	>	sync.acquire();
669	>	assertAwaitTimesOut(c, awaitMethod);
670	>	sync.release();
671		}
672
673		/**
674	<	* await returns when signalled
675	<	*/
676	<	public void testAwait() throws InterruptedException {
677	<	final Mutex sync = new Mutex();
678	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
679	<	Thread t = new Thread(new CheckedRunnable() {
674	>	* await/awaitNanos/awaitUntil returns when signalled
675	>	*/
676	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
677	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
678	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
679	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
680	>	public void testSignal(final AwaitMethod awaitMethod) {
681	>	final Mutex sync = new Mutex();
682	>	final ConditionObject c = sync.newCondition();
683	>	final BooleanLatch acquired = new BooleanLatch();
684	>	Thread t = newStartedThread(new CheckedRunnable() {
685		public void realRun() throws InterruptedException {
686	<	sync.acquire(1);
687	<	c.await();
688	<	sync.release(1);
686	>	sync.acquire();
687	>	assertTrue(acquired.releaseShared(0));
688	>	await(c, awaitMethod);
689	>	sync.release();
690		}});
691
692	<	t.start();
693	<	Thread.sleep(SHORT_DELAY_MS);
694	<	sync.acquire(1);
692	>	acquired.acquireShared(0);
693	>	sync.acquire();
694	>	assertHasWaitersLocked(sync, c, t);
695	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
696		c.signal();
697	<	sync.release(1);
698	<	t.join(SHORT_DELAY_MS);
699	<	assertFalse(t.isAlive());
697	>	assertHasWaitersLocked(sync, c, NO_THREADS);
698	>	assertHasExclusiveQueuedThreads(sync, t);
699	>	sync.release();
700	>	awaitTermination(t);
701		}
702
518	–
519	–
703		/**
704	<	* hasWaiters throws NPE if null
704	>	* hasWaiters(null) throws NullPointerException
705		*/
706		public void testHasWaitersNPE() {
707	<	final Mutex sync = new Mutex();
707	>	final Mutex sync = new Mutex();
708		try {
709		sync.hasWaiters(null);
710		shouldThrow();
#	Line 529 | Line 712 | public class AbstractQueuedLongSynchroni
712		}
713
714		/**
715	<	* getWaitQueueLength throws NPE if null
715	>	* getWaitQueueLength(null) throws NullPointerException
716		*/
717		public void testGetWaitQueueLengthNPE() {
718	<	final Mutex sync = new Mutex();
718	>	final Mutex sync = new Mutex();
719		try {
720		sync.getWaitQueueLength(null);
721		shouldThrow();
722		} catch (NullPointerException success) {}
723		}
724
542	–
725		/**
726		* getWaitingThreads throws NPE if null
727		*/
728		public void testGetWaitingThreadsNPE() {
729	<	final Mutex sync = new Mutex();
729	>	final Mutex sync = new Mutex();
730		try {
731		sync.getWaitingThreads(null);
732		shouldThrow();
733		} catch (NullPointerException success) {}
734		}
735
554	–
736		/**
737	<	* hasWaiters throws IAE if not owned
737	>	* hasWaiters throws IllegalArgumentException if not owned
738		*/
739		public void testHasWaitersIAE() {
740	<	final Mutex sync = new Mutex();
741	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
742	<	final Mutex sync2 = new Mutex();
740	>	final Mutex sync = new Mutex();
741	>	final ConditionObject c = sync.newCondition();
742	>	final Mutex sync2 = new Mutex();
743		try {
744		sync2.hasWaiters(c);
745		shouldThrow();
746		} catch (IllegalArgumentException success) {}
747	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
748		}
749
750		/**
751	<	* hasWaiters throws IMSE if not synced
751	>	* hasWaiters throws IllegalMonitorStateException if not synced
752		*/
753		public void testHasWaitersIMSE() {
754	<	final Mutex sync = new Mutex();
755	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
754	>	final Mutex sync = new Mutex();
755	>	final ConditionObject c = sync.newCondition();
756		try {
757		sync.hasWaiters(c);
758		shouldThrow();
759		} catch (IllegalMonitorStateException success) {}
760	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
761		}
762
580	–
763		/**
764	<	* getWaitQueueLength throws IAE if not owned
764	>	* getWaitQueueLength throws IllegalArgumentException if not owned
765		*/
766		public void testGetWaitQueueLengthIAE() {
767	<	final Mutex sync = new Mutex();
768	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
769	<	final Mutex sync2 = new Mutex();
767	>	final Mutex sync = new Mutex();
768	>	final ConditionObject c = sync.newCondition();
769	>	final Mutex sync2 = new Mutex();
770		try {
771		sync2.getWaitQueueLength(c);
772		shouldThrow();
773		} catch (IllegalArgumentException success) {}
774	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
775		}
776
777		/**
778	<	* getWaitQueueLength throws IMSE if not synced
778	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
779		*/
780		public void testGetWaitQueueLengthIMSE() {
781	<	final Mutex sync = new Mutex();
782	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
781	>	final Mutex sync = new Mutex();
782	>	final ConditionObject c = sync.newCondition();
783		try {
784		sync.getWaitQueueLength(c);
785		shouldThrow();
786		} catch (IllegalMonitorStateException success) {}
787	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
788		}
789
606	–
790		/**
791	<	* getWaitingThreads throws IAE if not owned
791	>	* getWaitingThreads throws IllegalArgumentException if not owned
792		*/
793		public void testGetWaitingThreadsIAE() {
794	<	final Mutex sync = new Mutex();
795	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
796	<	final Mutex sync2 = new Mutex();
794	>	final Mutex sync = new Mutex();
795	>	final ConditionObject c = sync.newCondition();
796	>	final Mutex sync2 = new Mutex();
797		try {
798		sync2.getWaitingThreads(c);
799		shouldThrow();
800		} catch (IllegalArgumentException success) {}
801	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
802		}
803
804		/**
805	<	* getWaitingThreads throws IMSE if not synced
805	>	* getWaitingThreads throws IllegalMonitorStateException if not synced
806		*/
807		public void testGetWaitingThreadsIMSE() {
808	<	final Mutex sync = new Mutex();
809	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
808	>	final Mutex sync = new Mutex();
809	>	final ConditionObject c = sync.newCondition();
810		try {
811		sync.getWaitingThreads(c);
812		shouldThrow();
813		} catch (IllegalMonitorStateException success) {}
814	+	assertHasWaitersUnlocked(sync, c, NO_THREADS);
815		}
816
632	–
633	–
817		/**
818		* hasWaiters returns true when a thread is waiting, else false
819		*/
820	<	public void testHasWaiters() throws InterruptedException {
821	<	final Mutex sync = new Mutex();
822	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
823	<	Thread t = new Thread(new CheckedRunnable() {
824	<	public void realRun() throws InterruptedException {
825	<	sync.acquire(1);
826	<	threadAssertFalse(sync.hasWaiters(c));
827	<	threadAssertEquals(0, sync.getWaitQueueLength(c));
820	>	public void testHasWaiters() {
821	>	final Mutex sync = new Mutex();
822	>	final ConditionObject c = sync.newCondition();
823	>	final BooleanLatch acquired = new BooleanLatch();
824	>	Thread t = newStartedThread(new CheckedRunnable() {
825	>	public void realRun() throws InterruptedException {
826	>	sync.acquire();
827	>	assertHasWaitersLocked(sync, c, NO_THREADS);
828	>	assertFalse(sync.hasWaiters(c));
829	>	assertTrue(acquired.releaseShared(0));
830		c.await();
831	<	sync.release(1);
831	>	sync.release();
832		}});
833
834	<	t.start();
835	<	Thread.sleep(SHORT_DELAY_MS);
836	<	sync.acquire(1);
834	>	acquired.acquireShared(0);
835	>	sync.acquire();
836	>	assertHasWaitersLocked(sync, c, t);
837	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
838		assertTrue(sync.hasWaiters(c));
653	–	assertEquals(1, sync.getWaitQueueLength(c));
839		c.signal();
840	<	sync.release(1);
841	<	Thread.sleep(SHORT_DELAY_MS);
657	<	sync.acquire(1);
840	>	assertHasWaitersLocked(sync, c, NO_THREADS);
841	>	assertHasExclusiveQueuedThreads(sync, t);
842		assertFalse(sync.hasWaiters(c));
843	<	assertEquals(0, sync.getWaitQueueLength(c));
844	<	sync.release(1);
845	<	t.join(SHORT_DELAY_MS);
846	<	assertFalse(t.isAlive());
843	>	sync.release();
844	>
845	>	awaitTermination(t);
846	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
847		}
848
849		/**
850		* getWaitQueueLength returns number of waiting threads
851		*/
852	<	public void testGetWaitQueueLength() throws InterruptedException {
853	<	final Mutex sync = new Mutex();
854	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
855	<	Thread t1 = new Thread(new CheckedRunnable() {
856	<	public void realRun() throws InterruptedException {
857	<	sync.acquire(1);
858	<	threadAssertFalse(sync.hasWaiters(c));
859	<	threadAssertEquals(0, sync.getWaitQueueLength(c));
852	>	public void testGetWaitQueueLength() {
853	>	final Mutex sync = new Mutex();
854	>	final ConditionObject c = sync.newCondition();
855	>	final BooleanLatch acquired1 = new BooleanLatch();
856	>	final BooleanLatch acquired2 = new BooleanLatch();
857	>	final Thread t1 = newStartedThread(new CheckedRunnable() {
858	>	public void realRun() throws InterruptedException {
859	>	sync.acquire();
860	>	assertHasWaitersLocked(sync, c, NO_THREADS);
861	>	assertEquals(0, sync.getWaitQueueLength(c));
862	>	assertTrue(acquired1.releaseShared(0));
863		c.await();
864	<	sync.release(1);
864	>	sync.release();
865		}});
866	+	acquired1.acquireShared(0);
867	+	sync.acquire();
868	+	assertHasWaitersLocked(sync, c, t1);
869	+	assertEquals(1, sync.getWaitQueueLength(c));
870	+	sync.release();
871
872	<	Thread t2 = new Thread(new CheckedRunnable() {
872	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
873		public void realRun() throws InterruptedException {
874	<	sync.acquire(1);
875	<	threadAssertTrue(sync.hasWaiters(c));
876	<	threadAssertEquals(1, sync.getWaitQueueLength(c));
874	>	sync.acquire();
875	>	assertHasWaitersLocked(sync, c, t1);
876	>	assertEquals(1, sync.getWaitQueueLength(c));
877	>	assertTrue(acquired2.releaseShared(0));
878		c.await();
879	<	sync.release(1);
879	>	sync.release();
880		}});
881	<
882	<	t1.start();
883	<	Thread.sleep(SHORT_DELAY_MS);
884	<	t2.start();
692	<	Thread.sleep(SHORT_DELAY_MS);
693	<	sync.acquire(1);
694	<	assertTrue(sync.hasWaiters(c));
881	>	acquired2.acquireShared(0);
882	>	sync.acquire();
883	>	assertHasWaitersLocked(sync, c, t1, t2);
884	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
885		assertEquals(2, sync.getWaitQueueLength(c));
886		c.signalAll();
887	<	sync.release(1);
888	<	Thread.sleep(SHORT_DELAY_MS);
699	<	sync.acquire(1);
700	<	assertFalse(sync.hasWaiters(c));
887	>	assertHasWaitersLocked(sync, c, NO_THREADS);
888	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
889		assertEquals(0, sync.getWaitQueueLength(c));
890	<	sync.release(1);
891	<	t1.join(SHORT_DELAY_MS);
892	<	t2.join(SHORT_DELAY_MS);
893	<	assertFalse(t1.isAlive());
894	<	assertFalse(t2.isAlive());
890	>	sync.release();
891	>
892	>	awaitTermination(t1);
893	>	awaitTermination(t2);
894	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
895		}
896
897		/**
898		* getWaitingThreads returns only and all waiting threads
899		*/
900	<	public void testGetWaitingThreads() throws InterruptedException {
901	<	final Mutex sync = new Mutex();
902	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
903	<	Thread t1 = new Thread(new CheckedRunnable() {
900	>	public void testGetWaitingThreads() {
901	>	final Mutex sync = new Mutex();
902	>	final ConditionObject c = sync.newCondition();
903	>	final BooleanLatch acquired1 = new BooleanLatch();
904	>	final BooleanLatch acquired2 = new BooleanLatch();
905	>	final Thread t1 = new Thread(new CheckedRunnable() {
906		public void realRun() throws InterruptedException {
907	<	sync.acquire(1);
908	<	threadAssertTrue(sync.getWaitingThreads(c).isEmpty());
907	>	sync.acquire();
908	>	assertHasWaitersLocked(sync, c, NO_THREADS);
909	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
910	>	assertTrue(acquired1.releaseShared(0));
911		c.await();
912	<	sync.release(1);
912	>	sync.release();
913		}});
914
915	<	Thread t2 = new Thread(new CheckedRunnable() {
915	>	final Thread t2 = new Thread(new CheckedRunnable() {
916		public void realRun() throws InterruptedException {
917	<	sync.acquire(1);
918	<	threadAssertFalse(sync.getWaitingThreads(c).isEmpty());
917	>	sync.acquire();
918	>	assertHasWaitersLocked(sync, c, t1);
919	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
920	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
921	>	assertEquals(1, sync.getWaitingThreads(c).size());
922	>	assertTrue(acquired2.releaseShared(0));
923		c.await();
924	<	sync.release(1);
924	>	sync.release();
925		}});
926
927	<	sync.acquire(1);
928	<	assertTrue(sync.getWaitingThreads(c).isEmpty());
929	<	sync.release(1);
930	<	t1.start();
931	<	Thread.sleep(SHORT_DELAY_MS);
932	<	t2.start();
933	<	Thread.sleep(SHORT_DELAY_MS);
738	<	sync.acquire(1);
739	<	assertTrue(sync.hasWaiters(c));
740	<	assertTrue(sync.getWaitingThreads(c).contains(t1));
741	<	assertTrue(sync.getWaitingThreads(c).contains(t2));
742	<	c.signalAll();
743	<	sync.release(1);
744	<	Thread.sleep(SHORT_DELAY_MS);
745	<	sync.acquire(1);
746	<	assertFalse(sync.hasWaiters(c));
747	<	assertTrue(sync.getWaitingThreads(c).isEmpty());
748	<	sync.release(1);
749	<	t1.join(SHORT_DELAY_MS);
750	<	t2.join(SHORT_DELAY_MS);
751	<	assertFalse(t1.isAlive());
752	<	assertFalse(t2.isAlive());
753	<	}
754	<
755	<
756	<
757	<	/**
758	<	* awaitUninterruptibly doesn't abort on interrupt
759	<	*/
760	<	public void testAwaitUninterruptibly() throws InterruptedException {
761	<	final Mutex sync = new Mutex();
762	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
763	<	Thread t = new Thread(new CheckedRunnable() {
764	<	public void realRun() {
765	<	sync.acquire(1);
766	<	c.awaitUninterruptibly();
767	<	sync.release(1);
768	<	}});
927	>	sync.acquire();
928	>	assertHasWaitersLocked(sync, c, NO_THREADS);
929	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
930	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
931	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
932	>	assertEquals(0, sync.getWaitingThreads(c).size());
933	>	sync.release();
934
935	<	t.start();
936	<	Thread.sleep(SHORT_DELAY_MS);
937	<	t.interrupt();
938	<	sync.acquire(1);
939	<	c.signal();
940	<	sync.release(1);
941	<	t.join(SHORT_DELAY_MS);
942	<	assertFalse(t.isAlive());
943	<	}
779	<
780	<	/**
781	<	* await is interruptible
782	<	*/
783	<	public void testAwait_Interrupt() throws InterruptedException {
784	<	final Mutex sync = new Mutex();
785	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
786	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
787	<	public void realRun() throws InterruptedException {
788	<	sync.acquire(1);
789	<	c.await();
790	<	sync.release(1);
791	<	}});
935	>	t1.start();
936	>	acquired1.acquireShared(0);
937	>	sync.acquire();
938	>	assertHasWaitersLocked(sync, c, t1);
939	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
940	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
941	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
942	>	assertEquals(1, sync.getWaitingThreads(c).size());
943	>	sync.release();
944
945	<	t.start();
946	<	Thread.sleep(SHORT_DELAY_MS);
947	<	t.interrupt();
948	<	t.join(SHORT_DELAY_MS);
949	<	assertFalse(t.isAlive());
945	>	t2.start();
946	>	acquired2.acquireShared(0);
947	>	sync.acquire();
948	>	assertHasWaitersLocked(sync, c, t1, t2);
949	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
950	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
951	>	assertTrue(sync.getWaitingThreads(c).contains(t2));
952	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
953	>	assertEquals(2, sync.getWaitingThreads(c).size());
954	>	c.signalAll();
955	>	assertHasWaitersLocked(sync, c, NO_THREADS);
956	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
957	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
958	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
959	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
960	>	assertEquals(0, sync.getWaitingThreads(c).size());
961	>	sync.release();
962	>
963	>	awaitTermination(t1);
964	>	awaitTermination(t2);
965	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
966		}
967
968		/**
969	<	* awaitNanos is interruptible
970	<	*/
971	<	public void testAwaitNanos_Interrupt() throws InterruptedException {
972	<	final Mutex sync = new Mutex();
973	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
974	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
975	<	public void realRun() throws InterruptedException {
976	<	sync.acquire(1);
977	<	c.awaitNanos(1000 * 1000 * 1000); // 1 sec
978	<	sync.release(1);
969	>	* awaitUninterruptibly is uninterruptible
970	>	*/
971	>	public void testAwaitUninterruptibly() {
972	>	final Mutex sync = new Mutex();
973	>	final ConditionObject condition = sync.newCondition();
974	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
975	>	Thread t = newStartedThread(new CheckedRunnable() {
976	>	public void realRun() {
977	>	sync.acquire();
978	>	assertTrue(pleaseInterrupt.releaseShared(0));
979	>	condition.awaitUninterruptibly();
980	>	assertTrue(Thread.interrupted());
981	>	assertHasWaitersLocked(sync, condition, NO_THREADS);
982	>	sync.release();
983		}});
984
985	<	t.start();
986	<	Thread.sleep(SHORT_DELAY_MS);
985	>	pleaseInterrupt.acquireShared(0);
986	>	sync.acquire();
987	>	assertHasWaitersLocked(sync, condition, t);
988	>	sync.release();
989		t.interrupt();
990	<	t.join(SHORT_DELAY_MS);
991	<	assertFalse(t.isAlive());
990	>	assertHasWaitersUnlocked(sync, condition, t);
991	>	assertThreadBlocks(t, Thread.State.WAITING);
992	>	sync.acquire();
993	>	assertHasWaitersLocked(sync, condition, t);
994	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
995	>	condition.signal();
996	>	assertHasWaitersLocked(sync, condition, NO_THREADS);
997	>	assertHasExclusiveQueuedThreads(sync, t);
998	>	sync.release();
999	>	awaitTermination(t);
1000		}
1001
1002		/**
1003	<	* awaitUntil is interruptible
1004	<	*/
1005	<	public void testAwaitUntil_Interrupt() throws InterruptedException {
1006	<	final Mutex sync = new Mutex();
1007	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
1008	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1009	<	public void realRun() throws InterruptedException {
1010	<	sync.acquire(1);
1011	<	java.util.Date d = new java.util.Date();
1012	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1013	<	sync.release(1);
1003	>	* await/awaitNanos/awaitUntil is interruptible
1004	>	*/
1005	>	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
1006	>	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
1007	>	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
1008	>	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
1009	>	public void testInterruptible(final AwaitMethod awaitMethod) {
1010	>	final Mutex sync = new Mutex();
1011	>	final ConditionObject c = sync.newCondition();
1012	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
1013	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1014	>	public void realRun() throws InterruptedException {
1015	>	sync.acquire();
1016	>	assertTrue(pleaseInterrupt.releaseShared(0));
1017	>	await(c, awaitMethod);
1018		}});
1019
1020	<	t.start();
835	<	Thread.sleep(SHORT_DELAY_MS);
1020	>	pleaseInterrupt.acquireShared(0);
1021		t.interrupt();
1022	<	t.join(SHORT_DELAY_MS);
838	<	assertFalse(t.isAlive());
1022	>	awaitTermination(t);
1023		}
1024
1025		/**
1026		* signalAll wakes up all threads
1027		*/
1028	<	public void testSignalAll() throws InterruptedException {
1029	<	final Mutex sync = new Mutex();
1030	<	final AbstractQueuedLongSynchronizer.ConditionObject c = sync.newCondition();
1031	<	Thread t1 = new Thread(new CheckedRunnable() {
1028	>	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1029	>	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1030	>	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1031	>	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1032	>	public void testSignalAll(final AwaitMethod awaitMethod) {
1033	>	final Mutex sync = new Mutex();
1034	>	final ConditionObject c = sync.newCondition();
1035	>	final BooleanLatch acquired1 = new BooleanLatch();
1036	>	final BooleanLatch acquired2 = new BooleanLatch();
1037	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1038		public void realRun() throws InterruptedException {
1039	<	sync.acquire(1);
1040	<	c.await();
1041	<	sync.release(1);
1039	>	sync.acquire();
1040	>	acquired1.releaseShared(0);
1041	>	await(c, awaitMethod);
1042	>	sync.release();
1043		}});
1044
1045	<	Thread t2 = new Thread(new CheckedRunnable() {
1045	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1046		public void realRun() throws InterruptedException {
1047	<	sync.acquire(1);
1048	<	c.await();
1049	<	sync.release(1);
1047	>	sync.acquire();
1048	>	acquired2.releaseShared(0);
1049	>	await(c, awaitMethod);
1050	>	sync.release();
1051		}});
1052
1053	<	t1.start();
1054	<	t2.start();
1055	<	Thread.sleep(SHORT_DELAY_MS);
1056	<	sync.acquire(1);
1053	>	acquired1.acquireShared(0);
1054	>	acquired2.acquireShared(0);
1055	>	sync.acquire();
1056	>	assertHasWaitersLocked(sync, c, t1, t2);
1057	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1058		c.signalAll();
1059	<	sync.release(1);
1060	<	t1.join(SHORT_DELAY_MS);
1061	<	t2.join(SHORT_DELAY_MS);
1062	<	assertFalse(t1.isAlive());
1063	<	assertFalse(t2.isAlive());
1059	>	assertHasWaitersLocked(sync, c, NO_THREADS);
1060	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
1061	>	sync.release();
1062	>	awaitTermination(t1);
1063	>	awaitTermination(t2);
1064		}
1065
873	–
1066		/**
1067		* toString indicates current state
1068		*/
1069		public void testToString() {
1070		Mutex sync = new Mutex();
1071	<	String us = sync.toString();
1072	<	assertTrue(us.indexOf("State = 0") >= 0);
1073	<	sync.acquire(1);
882	<	String ls = sync.toString();
883	<	assertTrue(ls.indexOf("State = " + Mutex.LOCKED) >= 0);
1071	>	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1072	>	sync.acquire();
1073	>	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1074		}
1075
1076		/**
1077	<	* A serialized AQS deserializes with current state
1078	<	*/
1079	<	public void testSerialization() throws Exception {
1080	<	Mutex l = new Mutex();
1081	<	l.acquire(1);
1082	<	assertTrue(l.isHeldExclusively());
1083	<
1084	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1085	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
896	<	out.writeObject(l);
897	<	out.close();
898	<
899	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
900	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
901	<	Mutex r = (Mutex) in.readObject();
902	<	assertTrue(r.isHeldExclusively());
903	<	}
1077	>	* A serialized AQS deserializes with current state, but no queued threads
1078	>	*/
1079	>	public void testSerialization() {
1080	>	Mutex sync = new Mutex();
1081	>	assertFalse(serialClone(sync).isHeldExclusively());
1082	>	sync.acquire();
1083	>	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1084	>	waitForQueuedThread(sync, t);
1085	>	assertTrue(sync.isHeldExclusively());
1086
1087	+	Mutex clone = serialClone(sync);
1088	+	assertTrue(clone.isHeldExclusively());
1089	+	assertHasExclusiveQueuedThreads(sync, t);
1090	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1091	+	t.interrupt();
1092	+	awaitTermination(t);
1093	+	sync.release();
1094	+	assertFalse(sync.isHeldExclusively());
1095	+	assertTrue(clone.isHeldExclusively());
1096	+	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1097	+	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1098	+	}
1099
1100		/**
1101		* tryReleaseShared setting state changes getState
1102		*/
1103		public void testGetStateWithReleaseShared() {
1104	<	final BooleanLatch l = new BooleanLatch();
1105	<	assertFalse(l.isSignalled());
1106	<	l.releaseShared(0);
1107	<	assertTrue(l.isSignalled());
1104	>	final BooleanLatch l = new BooleanLatch();
1105	>	assertFalse(l.isSignalled());
1106	>	assertTrue(l.releaseShared(0));
1107	>	assertTrue(l.isSignalled());
1108		}
1109
1110		/**
1111		* releaseShared has no effect when already signalled
1112		*/
1113		public void testReleaseShared() {
1114	<	final BooleanLatch l = new BooleanLatch();
1115	<	assertFalse(l.isSignalled());
1116	<	l.releaseShared(0);
1117	<	assertTrue(l.isSignalled());
1118	<	l.releaseShared(0);
1119	<	assertTrue(l.isSignalled());
1114	>	final BooleanLatch l = new BooleanLatch();
1115	>	assertFalse(l.isSignalled());
1116	>	assertTrue(l.releaseShared(0));
1117	>	assertTrue(l.isSignalled());
1118	>	assertTrue(l.releaseShared(0));
1119	>	assertTrue(l.isSignalled());
1120		}
1121
1122		/**
1123		* acquireSharedInterruptibly returns after release, but not before
1124		*/
1125	<	public void testAcquireSharedInterruptibly() throws InterruptedException {
1126	<	final BooleanLatch l = new BooleanLatch();
1125	>	public void testAcquireSharedInterruptibly() {
1126	>	final BooleanLatch l = new BooleanLatch();
1127
1128	<	Thread t = new Thread(new CheckedRunnable() {
1128	>	Thread t = newStartedThread(new CheckedRunnable() {
1129		public void realRun() throws InterruptedException {
1130	<	threadAssertFalse(l.isSignalled());
1130	>	assertFalse(l.isSignalled());
1131	>	l.acquireSharedInterruptibly(0);
1132	>	assertTrue(l.isSignalled());
1133		l.acquireSharedInterruptibly(0);
1134	<	threadAssertTrue(l.isSignalled());
1134	>	assertTrue(l.isSignalled());
1135		}});
1136
1137	<	t.start();
1137	>	waitForQueuedThread(l, t);
1138		assertFalse(l.isSignalled());
1139	<	Thread.sleep(SHORT_DELAY_MS);
1140	<	l.releaseShared(0);
1139	>	assertThreadBlocks(t, Thread.State.WAITING);
1140	>	assertHasSharedQueuedThreads(l, t);
1141	>	assertTrue(l.releaseShared(0));
1142		assertTrue(l.isSignalled());
1143	<	t.join();
1143	>	awaitTermination(t);
1144		}
1145
949	–
1146		/**
1147	<	* acquireSharedTimed returns after release
1147	>	* tryAcquireSharedNanos returns after release, but not before
1148		*/
1149	<	public void testAsquireSharedTimed() throws InterruptedException {
1150	<	final BooleanLatch l = new BooleanLatch();
1149	>	public void testTryAcquireSharedNanos() {
1150	>	final BooleanLatch l = new BooleanLatch();
1151
1152	<	Thread t = new Thread(new CheckedRunnable() {
1152	>	Thread t = newStartedThread(new CheckedRunnable() {
1153		public void realRun() throws InterruptedException {
1154	<	threadAssertFalse(l.isSignalled());
1155	<	threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
1156	<	threadAssertTrue(l.isSignalled());
1154	>	assertFalse(l.isSignalled());
1155	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1156	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1157	>	assertTrue(l.isSignalled());
1158	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1159	>	assertTrue(l.isSignalled());
1160		}});
1161
1162	<	t.start();
1162	>	waitForQueuedThread(l, t);
1163		assertFalse(l.isSignalled());
1164	<	Thread.sleep(SHORT_DELAY_MS);
1165	<	l.releaseShared(0);
1164	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
1165	>	assertTrue(l.releaseShared(0));
1166		assertTrue(l.isSignalled());
1167	<	t.join();
1167	>	awaitTermination(t);
1168		}
1169
1170		/**
1171	<	* acquireSharedInterruptibly throws IE if interrupted before released
1171	>	* acquireSharedInterruptibly is interruptible
1172		*/
1173	<	public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException {
1173	>	public void testAcquireSharedInterruptibly_Interruptible() {
1174		final BooleanLatch l = new BooleanLatch();
1175	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1176	<	public void realRun() throws InterruptedException {
1177	<	threadAssertFalse(l.isSignalled());
1175	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1176	>	public void realRun() throws InterruptedException {
1177	>	assertFalse(l.isSignalled());
1178		l.acquireSharedInterruptibly(0);
1179		}});
1180
1181	<	t.start();
1181	>	waitForQueuedThread(l, t);
1182		assertFalse(l.isSignalled());
1183		t.interrupt();
1184	<	t.join();
1184	>	awaitTermination(t);
1185	>	assertFalse(l.isSignalled());
1186		}
1187
1188		/**
1189	<	* acquireSharedTimed throws IE if interrupted before released
1189	>	* tryAcquireSharedNanos is interruptible
1190		*/
1191	<	public void testAcquireSharedNanos_InterruptedException() throws InterruptedException {
1191	>	public void testTryAcquireSharedNanos_Interruptible() {
1192		final BooleanLatch l = new BooleanLatch();
1193	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
1194	<	public void realRun() throws InterruptedException {
1195	<	threadAssertFalse(l.isSignalled());
1196	<	l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
1193	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1194	>	public void realRun() throws InterruptedException {
1195	>	assertFalse(l.isSignalled());
1196	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1197	>	l.tryAcquireSharedNanos(0, nanos);
1198		}});
1199
1200	<	t.start();
1000	<	Thread.sleep(SHORT_DELAY_MS);
1200	>	waitForQueuedThread(l, t);
1201		assertFalse(l.isSignalled());
1202		t.interrupt();
1203	<	t.join();
1203	>	awaitTermination(t);
1204	>	assertFalse(l.isSignalled());
1205		}
1206
1207		/**
1208	<	* acquireSharedTimed times out if not released before timeout
1208	>	* tryAcquireSharedNanos times out if not released before timeout
1209		*/
1210	<	public void testAcquireSharedNanos_Timeout() throws InterruptedException {
1210	>	public void testTryAcquireSharedNanos_Timeout() {
1211		final BooleanLatch l = new BooleanLatch();
1212	<	Thread t = new Thread(new CheckedRunnable() {
1212	>	final BooleanLatch observedQueued = new BooleanLatch();
1213	>	Thread t = newStartedThread(new CheckedRunnable() {
1214		public void realRun() throws InterruptedException {
1215	<	threadAssertFalse(l.isSignalled());
1216	<	threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1215	>	assertFalse(l.isSignalled());
1216	>	for (long millis = timeoutMillis();
1217	>	!observedQueued.isSignalled();
1218	>	millis *= 2) {
1219	>	long nanos = MILLISECONDS.toNanos(millis);
1220	>	long startTime = System.nanoTime();
1221	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1222	>	assertTrue(millisElapsedSince(startTime) >= millis);
1223	>	}
1224	>	assertFalse(l.isSignalled());
1225		}});
1226
1227	<	t.start();
1228	<	Thread.sleep(SHORT_DELAY_MS);
1227	>	waitForQueuedThread(l, t);
1228	>	observedQueued.releaseShared(0);
1229	>	assertFalse(l.isSignalled());
1230	>	awaitTermination(t);
1231		assertFalse(l.isSignalled());
1232	<	t.join();
1232	>	}
1233	>
1234	>	/**
1235	>	* awaitNanos/timed await with 0 wait times out immediately
1236	>	*/
1237	>	public void testAwait_Zero() throws InterruptedException {
1238	>	final Mutex sync = new Mutex();
1239	>	final ConditionObject c = sync.newCondition();
1240	>	sync.acquire();
1241	>	assertTrue(c.awaitNanos(0L) <= 0);
1242	>	assertFalse(c.await(0L, NANOSECONDS));
1243	>	sync.release();
1244	>	}
1245	>
1246	>	/**
1247	>	* awaitNanos/timed await with maximum negative wait times does not underflow
1248	>	*/
1249	>	public void testAwait_NegativeInfinity() throws InterruptedException {
1250	>	final Mutex sync = new Mutex();
1251	>	final ConditionObject c = sync.newCondition();
1252	>	sync.acquire();
1253	>	assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
1254	>	assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
1255	>	sync.release();
1256	>	}
1257	>
1258	>	/**
1259	>	* Tests scenario for
1260	>	* JDK-8191937: Lost interrupt in AbstractQueuedSynchronizer when tryAcquire methods throw
1261	>	* ant -Djsr166.tckTestClass=AbstractQueuedLongSynchronizerTest -Djsr166.methodFilter=testInterruptedFailingAcquire -Djsr166.runsPerTest=10000 tck
1262	>	*/
1263	>	public void testInterruptedFailingAcquire() throws Throwable {
1264	>	final RuntimeException ex = new RuntimeException();
1265	>
1266	>	// A synchronizer only offering a choice of failure modes
1267	>	class Sync extends AbstractQueuedLongSynchronizer {
1268	>	volatile boolean pleaseThrow;
1269	>	@Override protected boolean tryAcquire(long ignored) {
1270	>	if (pleaseThrow) throw ex;
1271	>	return false;
1272	>	}
1273	>	@Override protected long tryAcquireShared(long ignored) {
1274	>	if (pleaseThrow) throw ex;
1275	>	return -1;
1276	>	}
1277	>	@Override protected boolean tryRelease(long ignored) {
1278	>	return true;
1279	>	}
1280	>	@Override protected boolean tryReleaseShared(long ignored) {
1281	>	return true;
1282	>	}
1283	>	}
1284	>
1285	>	final Sync s = new Sync();
1286	>	final Action[] uninterruptibleAcquireMethods = {
1287	>	() -> s.acquire(1),
1288	>	() -> s.acquireShared(1),
1289	>	// TODO: test interruptible acquire methods
1290	>	};
1291	>	final Action[] releaseMethods = {
1292	>	() -> s.release(1),
1293	>	() -> s.releaseShared(1),
1294	>	};
1295	>	final Action acquireMethod
1296	>	= chooseRandomly(uninterruptibleAcquireMethods);
1297	>	final Action releaseMethod
1298	>	= chooseRandomly(releaseMethods);
1299	>
1300	>	// From os_posix.cpp:
1301	>	//
1302	>	// NOTE that since there is no "lock" around the interrupt and
1303	>	// is_interrupted operations, there is the possibility that the
1304	>	// interrupted flag (in osThread) will be "false" but that the
1305	>	// low-level events will be in the signaled state. This is
1306	>	// intentional. The effect of this is that Object.wait() and
1307	>	// LockSupport.park() will appear to have a spurious wakeup, which
1308	>	// is allowed and not harmful, and the possibility is so rare that
1309	>	// it is not worth the added complexity to add yet another lock.
1310	>	final Thread thread = newStartedThread(new CheckedRunnable() {
1311	>	public void realRun() {
1312	>	try {
1313	>	acquireMethod.run();
1314	>	shouldThrow();
1315	>	} catch (Throwable t) {
1316	>	assertSame(ex, t);
1317	>	awaitInterrupted();
1318	>	}
1319	>	}});
1320	>	for (long startTime = 0L;; ) {
1321	>	waitForThreadToEnterWaitState(thread);
1322	>	if (s.getFirstQueuedThread() == thread
1323	>	&& s.hasQueuedPredecessors()
1324	>	&& s.hasQueuedThreads()
1325	>	&& s.getQueueLength() == 1)
1326	>	break;
1327	>	if (startTime == 0L)
1328	>	startTime = System.nanoTime();
1329	>	else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
1330	>	fail("timed out waiting for AQS state: "
1331	>	+ "thread state=" + thread.getState()
1332	>	+ ", queued threads=" + s.getQueuedThreads());
1333	>	Thread.yield();
1334	>	}
1335	>
1336	>	s.pleaseThrow = true;
1337	>	// release and interrupt, in random order
1338	>	if (randomBoolean()) {
1339	>	thread.interrupt();
1340	>	releaseMethod.run();
1341	>	} else {
1342	>	releaseMethod.run();
1343	>	thread.interrupt();
1344	>	}
1345	>	awaitTermination(thread);
1346	>
1347	>	assertNull(s.getFirstQueuedThread());
1348	>	assertFalse(s.hasQueuedPredecessors());
1349	>	assertFalse(s.hasQueuedThreads());
1350	>	assertEquals(0, s.getQueueLength());
1351	>	assertTrue(s.getQueuedThreads().isEmpty());
1352		}
1353
1354		}

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