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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.14 by dl, Sat Jan 10 01:41:59 2004 UTC vs.
Revision 1.47 by jsr166, Wed Dec 31 19:05:42 2014 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
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.AbstractQueuedSynchronizer;
16	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject;
17	>
18	>	import junit.framework.AssertionFailedError;
19	>	import junit.framework.Test;
20	>	import junit.framework.TestSuite;
21
22		public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
23		public static void main(String[] args) {
24	<	junit.textui.TestRunner.run (suite());
24	>	junit.textui.TestRunner.run(suite());
25		}
26		public static Test suite() {
27		return new TestSuite(AbstractQueuedSynchronizerTest.class);
28		}
29
30		/**
31	<	* A simple mutex class, adapted from the
32	<	* AbstractQueuedSynchronizer javadoc.  Exclusive acquire tests
33	<	* exercise this as a sample user extension.  Other
34	<	* methods/features of AbstractQueuedSynchronizerTest are tested
35	<	* via other test classes, including those for ReentrantLock,
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.  Other
33	>	* methods/features of AbstractQueuedSynchronizer are tested via
34	>	* other test classes, including those for ReentrantLock,
35	>	* ReentrantReadWriteLock, and Semaphore.
36		*/
37		static class Mutex extends AbstractQueuedSynchronizer {
38	<	public boolean isLocked() { return getState() == 1; }
39	<
40	<	public boolean tryAcquireExclusive(int acquires) {
41	<	assertTrue(acquires == 1);
42	<	return compareAndSetState(0, 1);
43	<	}
44	<
45	<	public boolean tryReleaseExclusive(int releases) {
46	<	setState(0);
38	>	/** An eccentric value for locked synchronizer state. */
39	>	static final int LOCKED = (1 << 31) | (1 << 15);
40	>
41	>	static final int UNLOCKED = 0;
42	>
43	>	@Override public boolean isHeldExclusively() {
44	>	int state = getState();
45	>	assertTrue(state == UNLOCKED || state == LOCKED);
46	>	return state == LOCKED;
47	>	}
48	>
49	>	@Override public boolean tryAcquire(int acquires) {
50	>	assertEquals(LOCKED, acquires);
51	>	return compareAndSetState(UNLOCKED, LOCKED);
52	>	}
53	>
54	>	@Override public boolean tryRelease(int releases) {
55	>	if (getState() != LOCKED) throw new IllegalMonitorStateException();
56	>	assertEquals(LOCKED, releases);
57	>	setState(UNLOCKED);
58		return true;
59		}
60	<
61	<	public void checkConditionAccess(Thread thread) {
62	<	if (getState() == 0) throw new IllegalMonitorStateException();
60	>
61	>	public boolean tryAcquireNanos(long nanos) throws InterruptedException {
62	>	return tryAcquireNanos(LOCKED, nanos);
63	>	}
64	>
65	>	public boolean tryAcquire() {
66	>	return tryAcquire(LOCKED);
67		}
68	<
69	<	public ConditionObject newCondition() { return new ConditionObject(); }
70	<
71	<	public void lock() {
72	<	acquireExclusiveUninterruptibly(1);
68	>
69	>	public boolean tryRelease() {
70	>	return tryRelease(LOCKED);
71	>	}
72	>
73	>	public void acquire() {
74	>	acquire(LOCKED);
75		}
76
77	+	public void acquireInterruptibly() throws InterruptedException {
78	+	acquireInterruptibly(LOCKED);
79	+	}
80	+
81	+	public void release() {
82	+	release(LOCKED);
83	+	}
84	+
85	+	public ConditionObject newCondition() {
86	+	return new ConditionObject();
87	+	}
88		}
89
57	–
90		/**
91		* A simple latch class, to test shared mode.
92		*/
93	<	static class BooleanLatch extends AbstractQueuedSynchronizer {
93	>	static class BooleanLatch extends AbstractQueuedSynchronizer {
94		public boolean isSignalled() { return getState() != 0; }
95
96		public int tryAcquireShared(int ignore) {
97	<	return isSignalled()? 1 : -1;
97	>	return isSignalled() ? 1 : -1;
98		}
99	<
99	>
100		public boolean tryReleaseShared(int ignore) {
101		setState(1);
102		return true;
#	Line 72 | Line 104 | public class AbstractQueuedSynchronizerT
104		}
105
106		/**
107	<	* A runnable calling acquireExclusiveInterruptibly
107	>	* A runnable calling acquireInterruptibly that does not expect to
108	>	* be interrupted.
109		*/
110	<	class InterruptibleLockRunnable implements Runnable {
111	<	final Mutex lock;
112	<	InterruptibleLockRunnable(Mutex l) { lock = l; }
113	<	public void run() {
114	<	try {
115	<	lock.acquireExclusiveInterruptibly(1);
116	<	} catch(InterruptedException success){}
110	>	class InterruptibleSyncRunnable extends CheckedRunnable {
111	>	final Mutex sync;
112	>	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
113	>	public void realRun() throws InterruptedException {
114	>	sync.acquireInterruptibly();
115	>	}
116	>	}
117	>
118	>	/**
119	>	* A runnable calling acquireInterruptibly that expects to be
120	>	* interrupted.
121	>	*/
122	>	class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
123	>	final Mutex sync;
124	>	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
125	>	public void realRun() throws InterruptedException {
126	>	sync.acquireInterruptibly();
127		}
128		}
129
130	+	/** A constant to clarify calls to checking methods below. */
131	+	static final Thread[] NO_THREADS = new Thread[0];
132
133		/**
134	<	* A runnable calling acquireExclusiveInterruptibly that expects to be
90	<	* interrupted
134	>	* Spin-waits until sync.isQueued(t) becomes true.
135		*/
136	<	class InterruptedLockRunnable implements Runnable {
137	<	final Mutex lock;
138	<	InterruptedLockRunnable(Mutex l) { lock = l; }
139	<	public void run() {
140	<	try {
141	<	lock.acquireExclusiveInterruptibly(1);
98	<	threadShouldThrow();
99	<	} catch(InterruptedException success){}
136	>	void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) {
137	>	long startTime = System.nanoTime();
138	>	while (!sync.isQueued(t)) {
139	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
140	>	throw new AssertionFailedError("timed out");
141	>	Thread.yield();
142		}
143	+	assertTrue(t.isAlive());
144		}
145	<
145	>
146		/**
147	<	* acquireExclusiveUninterruptiblying an releaseExclusiveed lock succeeds
147	>	* Checks that sync has exactly the given queued threads.
148		*/
149	<	public void testAcquireExclusiveUninterruptibly() {
150	<	Mutex rl = new Mutex();
151	<	rl.acquireExclusiveUninterruptibly(1);
152	<	assertTrue(rl.isLocked());
153	<	rl.releaseExclusive(1);
149	>	void assertHasQueuedThreads(AbstractQueuedSynchronizer sync,
150	>	Thread... expected) {
151	>	Collection<Thread> actual = sync.getQueuedThreads();
152	>	assertEquals(expected.length > 0, sync.hasQueuedThreads());
153	>	assertEquals(expected.length, sync.getQueueLength());
154	>	assertEquals(expected.length, actual.size());
155	>	assertEquals(expected.length == 0, actual.isEmpty());
156	>	assertEquals(new HashSet<Thread>(actual),
157	>	new HashSet<Thread>(Arrays.asList(expected)));
158		}
159
160		/**
161	<	* tryAcquireExclusive on an releaseExclusiveed lock succeeds
161	>	* Checks that sync has exactly the given (exclusive) queued threads.
162		*/
163	<	public void testTryAcquireExclusive() {
164	<	Mutex rl = new Mutex();
165	<	assertTrue(rl.tryAcquireExclusive(1));
166	<	assertTrue(rl.isLocked());
167	<	rl.releaseExclusive(1);
163	>	void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync,
164	>	Thread... expected) {
165	>	assertHasQueuedThreads(sync, expected);
166	>	assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()),
167	>	new HashSet<Thread>(sync.getQueuedThreads()));
168	>	assertEquals(0, sync.getSharedQueuedThreads().size());
169	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
170		}
171
172		/**
173	<	* hasQueuedThreads reports whether there are waiting threads
173	>	* Checks that sync has exactly the given (shared) queued threads.
174		*/
175	<	public void testhasQueuedThreads() {
176	<	final Mutex lock = new Mutex();
177	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
178	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
179	<	try {
180	<	assertFalse(lock.hasQueuedThreads());
181	<	lock.acquireExclusiveUninterruptibly(1);
182	<	t1.start();
134	<	Thread.sleep(SHORT_DELAY_MS);
135	<	assertTrue(lock.hasQueuedThreads());
136	<	t2.start();
137	<	Thread.sleep(SHORT_DELAY_MS);
138	<	assertTrue(lock.hasQueuedThreads());
139	<	t1.interrupt();
140	<	Thread.sleep(SHORT_DELAY_MS);
141	<	assertTrue(lock.hasQueuedThreads());
142	<	lock.releaseExclusive(1);
143	<	Thread.sleep(SHORT_DELAY_MS);
144	<	assertFalse(lock.hasQueuedThreads());
145	<	t1.join();
146	<	t2.join();
147	<	} catch(Exception e){
148	<	unexpectedException();
149	<	}
150	<	}
151	<
152	<	/**
153	<	* isQueued(null) throws NPE
154	<	*/
155	<	public void testIsQueuedNPE() {
156	<	final Mutex lock = new Mutex();
157	<	try {
158	<	lock.isQueued(null);
159	<	shouldThrow();
160	<	} catch (NullPointerException success) {
161	<	}
162	<	}
163	<
164	<	/**
165	<	* isQueued reports whether a thread is queued.
166	<	*/
167	<	public void testIsQueued() {
168	<	final Mutex lock = new Mutex();
169	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
170	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
171	<	try {
172	<	assertFalse(lock.isQueued(t1));
173	<	assertFalse(lock.isQueued(t2));
174	<	lock.acquireExclusiveUninterruptibly(1);
175	<	t1.start();
176	<	Thread.sleep(SHORT_DELAY_MS);
177	<	assertTrue(lock.isQueued(t1));
178	<	t2.start();
179	<	Thread.sleep(SHORT_DELAY_MS);
180	<	assertTrue(lock.isQueued(t1));
181	<	assertTrue(lock.isQueued(t2));
182	<	t1.interrupt();
183	<	Thread.sleep(SHORT_DELAY_MS);
184	<	assertFalse(lock.isQueued(t1));
185	<	assertTrue(lock.isQueued(t2));
186	<	lock.releaseExclusive(1);
187	<	Thread.sleep(SHORT_DELAY_MS);
188	<	assertFalse(lock.isQueued(t1));
189	<	assertFalse(lock.isQueued(t2));
190	<	t1.join();
191	<	t2.join();
192	<	} catch(Exception e){
193	<	unexpectedException();
194	<	}
195	<	}
196	<
197	<	/**
198	<	* getFirstQueuedThread returns first waiting thread or null is none
199	<	*/
200	<	public void testGetFirstQueuedThread() {
201	<	final Mutex lock = new Mutex();
202	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
203	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
204	<	try {
205	<	assertNull(lock.getFirstQueuedThread());
206	<	lock.acquireExclusiveUninterruptibly(1);
207	<	t1.start();
208	<	Thread.sleep(SHORT_DELAY_MS);
209	<	assertEquals(t1, lock.getFirstQueuedThread());
210	<	t2.start();
211	<	Thread.sleep(SHORT_DELAY_MS);
212	<	assertEquals(t1, lock.getFirstQueuedThread());
213	<	t1.interrupt();
214	<	Thread.sleep(SHORT_DELAY_MS);
215	<	assertEquals(t2, lock.getFirstQueuedThread());
216	<	lock.releaseExclusive(1);
217	<	Thread.sleep(SHORT_DELAY_MS);
218	<	assertNull(lock.getFirstQueuedThread());
219	<	t1.join();
220	<	t2.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
175	>	void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync,
176	>	Thread... expected) {
177	>	assertHasQueuedThreads(sync, expected);
178	>	assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()),
179	>	new HashSet<Thread>(sync.getQueuedThreads()));
180	>	assertEquals(0, sync.getExclusiveQueuedThreads().size());
181	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
182	>	}
183
184	+	/**
185	+	* Checks that condition c has exactly the given waiter threads,
186	+	* after acquiring mutex.
187	+	*/
188	+	void assertHasWaitersUnlocked(Mutex sync, ConditionObject c,
189	+	Thread... threads) {
190	+	sync.acquire();
191	+	assertHasWaitersLocked(sync, c, threads);
192	+	sync.release();
193	+	}
194
195		/**
196	<	* hasContended reports false if no thread has ever blocked, else true
196	>	* Checks that condition c has exactly the given waiter threads.
197		*/
198	<	public void testHasContended() {
199	<	final Mutex lock = new Mutex();
200	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
201	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
202	<	try {
203	<	assertFalse(lock.hasContended());
204	<	lock.acquireExclusiveUninterruptibly(1);
205	<	t1.start();
206	<	Thread.sleep(SHORT_DELAY_MS);
207	<	assertTrue(lock.hasContended());
208	<	t2.start();
209	<	Thread.sleep(SHORT_DELAY_MS);
210	<	assertTrue(lock.hasContended());
211	<	t1.interrupt();
212	<	Thread.sleep(SHORT_DELAY_MS);
213	<	assertTrue(lock.hasContended());
214	<	lock.releaseExclusive(1);
215	<	Thread.sleep(SHORT_DELAY_MS);
216	<	assertTrue(lock.hasContended());
217	<	t1.join();
218	<	t2.join();
219	<	} catch(Exception e){
220	<	unexpectedException();
221	<	}
222	<	}
223	<
224	<	/**
225	<	* acquireExclusiveNanos is interruptible.
226	<	*/
227	<	public void testInterruptedException2() {
228	<	final Mutex lock = new Mutex();
229	<	lock.acquireExclusiveUninterruptibly(1);
230	<	Thread t = new Thread(new Runnable() {
263	<	public void run() {
264	<	try {
265	<	lock.acquireExclusiveNanos(1, MEDIUM_DELAY_MS * 1000 * 1000);
266	<	threadShouldThrow();
267	<	} catch(InterruptedException success){}
268	<	}
269	<	});
270	<	try {
271	<	t.start();
272	<	t.interrupt();
273	<	} catch(Exception e){
274	<	unexpectedException();
198	>	void assertHasWaitersLocked(Mutex sync, ConditionObject c,
199	>	Thread... threads) {
200	>	assertEquals(threads.length > 0, sync.hasWaiters(c));
201	>	assertEquals(threads.length, sync.getWaitQueueLength(c));
202	>	assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty());
203	>	assertEquals(threads.length, sync.getWaitingThreads(c).size());
204	>	assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)),
205	>	new HashSet<Thread>(Arrays.asList(threads)));
206	>	}
207	>
208	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
209	>
210	>	/**
211	>	* Awaits condition using the specified AwaitMethod.
212	>	*/
213	>	void await(ConditionObject c, AwaitMethod awaitMethod)
214	>	throws InterruptedException {
215	>	long timeoutMillis = 2 * LONG_DELAY_MS;
216	>	switch (awaitMethod) {
217	>	case await:
218	>	c.await();
219	>	break;
220	>	case awaitTimed:
221	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
222	>	break;
223	>	case awaitNanos:
224	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
225	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
226	>	assertTrue(nanosRemaining > 0);
227	>	break;
228	>	case awaitUntil:
229	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
230	>	break;
231		}
232		}
233
234	+	/**
235	+	* Checks that awaiting the given condition times out (using the
236	+	* default timeout duration).
237	+	*/
238	+	void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
239	+	long timeoutMillis = timeoutMillis();
240	+	long startTime = System.nanoTime();
241	+	try {
242	+	switch (awaitMethod) {
243	+	case awaitTimed:
244	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
245	+	break;
246	+	case awaitNanos:
247	+	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
248	+	long nanosRemaining = c.awaitNanos(nanosTimeout);
249	+	assertTrue(nanosRemaining <= 0);
250	+	break;
251	+	case awaitUntil:
252	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
253	+	break;
254	+	default:
255	+	throw new UnsupportedOperationException();
256	+	}
257	+	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
258	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
259	+	}
260	+
261	+	/**
262	+	* isHeldExclusively is false upon construction
263	+	*/
264	+	public void testIsHeldExclusively() {
265	+	Mutex sync = new Mutex();
266	+	assertFalse(sync.isHeldExclusively());
267	+	}
268	+
269	+	/**
270	+	* acquiring released sync succeeds
271	+	*/
272	+	public void testAcquire() {
273	+	Mutex sync = new Mutex();
274	+	sync.acquire();
275	+	assertTrue(sync.isHeldExclusively());
276	+	sync.release();
277	+	assertFalse(sync.isHeldExclusively());
278	+	}
279	+
280	+	/**
281	+	* tryAcquire on a released sync succeeds
282	+	*/
283	+	public void testTryAcquire() {
284	+	Mutex sync = new Mutex();
285	+	assertTrue(sync.tryAcquire());
286	+	assertTrue(sync.isHeldExclusively());
287	+	sync.release();
288	+	assertFalse(sync.isHeldExclusively());
289	+	}
290	+
291	+	/**
292	+	* hasQueuedThreads reports whether there are waiting threads
293	+	*/
294	+	public void testHasQueuedThreads() {
295	+	final Mutex sync = new Mutex();
296	+	assertFalse(sync.hasQueuedThreads());
297	+	sync.acquire();
298	+	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
299	+	waitForQueuedThread(sync, t1);
300	+	assertTrue(sync.hasQueuedThreads());
301	+	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
302	+	waitForQueuedThread(sync, t2);
303	+	assertTrue(sync.hasQueuedThreads());
304	+	t1.interrupt();
305	+	awaitTermination(t1);
306	+	assertTrue(sync.hasQueuedThreads());
307	+	sync.release();
308	+	awaitTermination(t2);
309	+	assertFalse(sync.hasQueuedThreads());
310	+	}
311	+
312	+	/**
313	+	* isQueued(null) throws NullPointerException
314	+	*/
315	+	public void testIsQueuedNPE() {
316	+	final Mutex sync = new Mutex();
317	+	try {
318	+	sync.isQueued(null);
319	+	shouldThrow();
320	+	} catch (NullPointerException success) {}
321	+	}
322	+
323	+	/**
324	+	* isQueued reports whether a thread is queued
325	+	*/
326	+	public void testIsQueued() {
327	+	final Mutex sync = new Mutex();
328	+	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
329	+	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
330	+	assertFalse(sync.isQueued(t1));
331	+	assertFalse(sync.isQueued(t2));
332	+	sync.acquire();
333	+	t1.start();
334	+	waitForQueuedThread(sync, t1);
335	+	assertTrue(sync.isQueued(t1));
336	+	assertFalse(sync.isQueued(t2));
337	+	t2.start();
338	+	waitForQueuedThread(sync, t2);
339	+	assertTrue(sync.isQueued(t1));
340	+	assertTrue(sync.isQueued(t2));
341	+	t1.interrupt();
342	+	awaitTermination(t1);
343	+	assertFalse(sync.isQueued(t1));
344	+	assertTrue(sync.isQueued(t2));
345	+	sync.release();
346	+	awaitTermination(t2);
347	+	assertFalse(sync.isQueued(t1));
348	+	assertFalse(sync.isQueued(t2));
349	+	}
350	+
351	+	/**
352	+	* getFirstQueuedThread returns first waiting thread or null if none
353	+	*/
354	+	public void testGetFirstQueuedThread() {
355	+	final Mutex sync = new Mutex();
356	+	assertNull(sync.getFirstQueuedThread());
357	+	sync.acquire();
358	+	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
359	+	waitForQueuedThread(sync, t1);
360	+	assertEquals(t1, sync.getFirstQueuedThread());
361	+	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
362	+	waitForQueuedThread(sync, t2);
363	+	assertEquals(t1, sync.getFirstQueuedThread());
364	+	t1.interrupt();
365	+	awaitTermination(t1);
366	+	assertEquals(t2, sync.getFirstQueuedThread());
367	+	sync.release();
368	+	awaitTermination(t2);
369	+	assertNull(sync.getFirstQueuedThread());
370	+	}
371
372		/**
373	<	* TryAcquireExclusive on a locked lock fails
374	<	*/
375	<	public void testTryAcquireExclusiveWhenLocked() {
376	<	final Mutex lock = new Mutex();
377	<	lock.acquireExclusiveUninterruptibly(1);
378	<	Thread t = new Thread(new Runnable() {
379	<	public void run() {
380	<	threadAssertFalse(lock.tryAcquireExclusive(1));
381	<	}
382	<	});
383	<	try {
384	<	t.start();
385	<	t.join();
386	<	lock.releaseExclusive(1);
387	<	} catch(Exception e){
388	<	unexpectedException();
389	<	}
390	<	}
391	<
392	<	/**
393	<	* acquireExclusiveNanos on a locked lock times out
394	<	*/
395	<	public void testAcquireExclusiveNanos_Timeout() {
396	<	final Mutex lock = new Mutex();
397	<	lock.acquireExclusiveUninterruptibly(1);
398	<	Thread t = new Thread(new Runnable() {
399	<	public void run() {
400	<	try {
401	<	threadAssertFalse(lock.acquireExclusiveNanos(1, 1000 * 1000));
402	<	} catch (Exception ex) {
403	<	threadUnexpectedException();
404	<	}
405	<	}
406	<	});
407	<	try {
408	<	t.start();
409	<	t.join();
410	<	lock.releaseExclusive(1);
411	<	} catch(Exception e){
412	<	unexpectedException();
413	<	}
414	<	}
415	<
416	<
373	>	* hasContended reports false if no thread has ever blocked, else true
374	>	*/
375	>	public void testHasContended() {
376	>	final Mutex sync = new Mutex();
377	>	assertFalse(sync.hasContended());
378	>	sync.acquire();
379	>	assertFalse(sync.hasContended());
380	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
381	>	waitForQueuedThread(sync, t1);
382	>	assertTrue(sync.hasContended());
383	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
384	>	waitForQueuedThread(sync, t2);
385	>	assertTrue(sync.hasContended());
386	>	t1.interrupt();
387	>	awaitTermination(t1);
388	>	assertTrue(sync.hasContended());
389	>	sync.release();
390	>	awaitTermination(t2);
391	>	assertTrue(sync.hasContended());
392	>	}
393	>
394	>	/**
395	>	* getQueuedThreads returns all waiting threads
396	>	*/
397	>	public void testGetQueuedThreads() {
398	>	final Mutex sync = new Mutex();
399	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
400	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
401	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
402	>	sync.acquire();
403	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
404	>	t1.start();
405	>	waitForQueuedThread(sync, t1);
406	>	assertHasExclusiveQueuedThreads(sync, t1);
407	>	assertTrue(sync.getQueuedThreads().contains(t1));
408	>	assertFalse(sync.getQueuedThreads().contains(t2));
409	>	t2.start();
410	>	waitForQueuedThread(sync, t2);
411	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
412	>	assertTrue(sync.getQueuedThreads().contains(t1));
413	>	assertTrue(sync.getQueuedThreads().contains(t2));
414	>	t1.interrupt();
415	>	awaitTermination(t1);
416	>	assertHasExclusiveQueuedThreads(sync, t2);
417	>	sync.release();
418	>	awaitTermination(t2);
419	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
420	>	}
421	>
422	>	/**
423	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
424	>	*/
425	>	public void testGetExclusiveQueuedThreads() {
426	>	final Mutex sync = new Mutex();
427	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
428	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
429	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
430	>	sync.acquire();
431	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
432	>	t1.start();
433	>	waitForQueuedThread(sync, t1);
434	>	assertHasExclusiveQueuedThreads(sync, t1);
435	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
436	>	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
437	>	t2.start();
438	>	waitForQueuedThread(sync, t2);
439	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
440	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
441	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
442	>	t1.interrupt();
443	>	awaitTermination(t1);
444	>	assertHasExclusiveQueuedThreads(sync, t2);
445	>	sync.release();
446	>	awaitTermination(t2);
447	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
448	>	}
449	>
450	>	/**
451	>	* getSharedQueuedThreads does not include exclusively waiting threads
452	>	*/
453	>	public void testGetSharedQueuedThreads_Exclusive() {
454	>	final Mutex sync = new Mutex();
455	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
456	>	sync.acquire();
457	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
458	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
459	>	waitForQueuedThread(sync, t1);
460	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
461	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
462	>	waitForQueuedThread(sync, t2);
463	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
464	>	t1.interrupt();
465	>	awaitTermination(t1);
466	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
467	>	sync.release();
468	>	awaitTermination(t2);
469	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
470	>	}
471	>
472	>	/**
473	>	* getSharedQueuedThreads returns all shared waiting threads
474	>	*/
475	>	public void testGetSharedQueuedThreads_Shared() {
476	>	final BooleanLatch l = new BooleanLatch();
477	>	assertHasSharedQueuedThreads(l, NO_THREADS);
478	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
479	>	public void realRun() throws InterruptedException {
480	>	l.acquireSharedInterruptibly(0);
481	>	}});
482	>	waitForQueuedThread(l, t1);
483	>	assertHasSharedQueuedThreads(l, t1);
484	>	Thread t2 = newStartedThread(new CheckedRunnable() {
485	>	public void realRun() throws InterruptedException {
486	>	l.acquireSharedInterruptibly(0);
487	>	}});
488	>	waitForQueuedThread(l, t2);
489	>	assertHasSharedQueuedThreads(l, t1, t2);
490	>	t1.interrupt();
491	>	awaitTermination(t1);
492	>	assertHasSharedQueuedThreads(l, t2);
493	>	assertTrue(l.releaseShared(0));
494	>	awaitTermination(t2);
495	>	assertHasSharedQueuedThreads(l, NO_THREADS);
496	>	}
497	>
498	>	/**
499	>	* tryAcquireNanos is interruptible
500	>	*/
501	>	public void testTryAcquireNanos_Interruptible() {
502	>	final Mutex sync = new Mutex();
503	>	sync.acquire();
504	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
505	>	public void realRun() throws InterruptedException {
506	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
507	>	}});
508	>
509	>	waitForQueuedThread(sync, t);
510	>	t.interrupt();
511	>	awaitTermination(t);
512	>	}
513	>
514	>	/**
515	>	* tryAcquire on exclusively held sync fails
516	>	*/
517	>	public void testTryAcquireWhenSynced() {
518	>	final Mutex sync = new Mutex();
519	>	sync.acquire();
520	>	Thread t = newStartedThread(new CheckedRunnable() {
521	>	public void realRun() {
522	>	assertFalse(sync.tryAcquire());
523	>	}});
524	>
525	>	awaitTermination(t);
526	>	sync.release();
527	>	}
528	>
529	>	/**
530	>	* tryAcquireNanos on an exclusively held sync times out
531	>	*/
532	>	public void testAcquireNanos_Timeout() {
533	>	final Mutex sync = new Mutex();
534	>	sync.acquire();
535	>	Thread t = newStartedThread(new CheckedRunnable() {
536	>	public void realRun() throws InterruptedException {
537	>	long startTime = System.nanoTime();
538	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
539	>	assertFalse(sync.tryAcquireNanos(nanos));
540	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
541	>	}});
542	>
543	>	awaitTermination(t);
544	>	sync.release();
545	>	}
546	>
547		/**
548		* getState is true when acquired and false when not
549		*/
550		public void testGetState() {
551	<	final Mutex lock = new Mutex();
552	<	lock.acquireExclusiveUninterruptibly(1);
553	<	assertTrue(lock.isLocked());
554	<	lock.releaseExclusive(1);
555	<	assertFalse(lock.isLocked());
556	<	Thread t = new Thread(new Runnable() {
557	<	public void run() {
558	<	lock.acquireExclusiveUninterruptibly(1);
559	<	try {
560	<	Thread.sleep(SMALL_DELAY_MS);
561	<	}
562	<	catch(Exception e) {
563	<	threadUnexpectedException();
564	<	}
565	<	lock.releaseExclusive(1);
566	<	}
567	<	});
568	<	try {
569	<	t.start();
570	<	Thread.sleep(SHORT_DELAY_MS);
571	<	assertTrue(lock.isLocked());
349	<	t.join();
350	<	assertFalse(lock.isLocked());
351	<	} catch(Exception e){
352	<	unexpectedException();
353	<	}
551	>	final Mutex sync = new Mutex();
552	>	sync.acquire();
553	>	assertTrue(sync.isHeldExclusively());
554	>	sync.release();
555	>	assertFalse(sync.isHeldExclusively());
556	>
557	>	final BooleanLatch acquired = new BooleanLatch();
558	>	final BooleanLatch done = new BooleanLatch();
559	>	Thread t = newStartedThread(new CheckedRunnable() {
560	>	public void realRun() throws InterruptedException {
561	>	sync.acquire();
562	>	assertTrue(acquired.releaseShared(0));
563	>	done.acquireShared(0);
564	>	sync.release();
565	>	}});
566	>
567	>	acquired.acquireShared(0);
568	>	assertTrue(sync.isHeldExclusively());
569	>	assertTrue(done.releaseShared(0));
570	>	awaitTermination(t);
571	>	assertFalse(sync.isHeldExclusively());
572		}
573
574	+	/**
575	+	* acquireInterruptibly succeeds when released, else is interruptible
576	+	*/
577	+	public void testAcquireInterruptibly() throws InterruptedException {
578	+	final Mutex sync = new Mutex();
579	+	final BooleanLatch threadStarted = new BooleanLatch();
580	+	sync.acquireInterruptibly();
581	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
582	+	public void realRun() throws InterruptedException {
583	+	assertTrue(threadStarted.releaseShared(0));
584	+	sync.acquireInterruptibly();
585	+	}});
586	+
587	+	threadStarted.acquireShared(0);
588	+	waitForQueuedThread(sync, t);
589	+	t.interrupt();
590	+	awaitTermination(t);
591	+	assertTrue(sync.isHeldExclusively());
592	+	}
593
594		/**
595	<	* acquireExclusiveInterruptibly is interruptible.
596	<	*/
597	<	public void testAcquireInterruptibly1() {
598	<	final Mutex lock = new Mutex();
599	<	lock.acquireExclusiveUninterruptibly(1);
600	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
601	<	try {
602	<	t.start();
603	<	t.interrupt();
604	<	lock.releaseExclusive(1);
605	<	t.join();
606	<	} catch(Exception e){
607	<	unexpectedException();
608	<	}
609	<	}
610	<
611	<	/**
612	<	* acquireExclusiveInterruptibly succeeds when released, else is interruptible
613	<	*/
614	<	public void testAcquireInterruptibly2() {
615	<	final Mutex lock = new Mutex();
616	<	try {
617	<	lock.acquireExclusiveInterruptibly(1);
618	<	} catch(Exception e) {
382	<	unexpectedException();
383	<	}
384	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
385	<	try {
386	<	t.start();
387	<	t.interrupt();
388	<	assertTrue(lock.isLocked());
389	<	t.join();
390	<	} catch(Exception e){
391	<	unexpectedException();
595	>	* owns is true for a condition created by sync else false
596	>	*/
597	>	public void testOwns() {
598	>	final Mutex sync = new Mutex();
599	>	final ConditionObject c = sync.newCondition();
600	>	final Mutex sync2 = new Mutex();
601	>	assertTrue(sync.owns(c));
602	>	assertFalse(sync2.owns(c));
603	>	}
604	>
605	>	/**
606	>	* Calling await without holding sync throws IllegalMonitorStateException
607	>	*/
608	>	public void testAwait_IMSE() {
609	>	final Mutex sync = new Mutex();
610	>	final ConditionObject c = sync.newCondition();
611	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
612	>	long startTime = System.nanoTime();
613	>	try {
614	>	await(c, awaitMethod);
615	>	shouldThrow();
616	>	} catch (IllegalMonitorStateException success) {
617	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
618	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
619		}
620		}
621
622		/**
623	<	* owns is true for a condition created by lock else false
623	>	* Calling signal without holding sync throws IllegalMonitorStateException
624		*/
625	<	public void testOwns() {
626	<	final Mutex lock = new Mutex();
627	<	final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition();
628	<	final Mutex lock2 = new Mutex();
629	<	assertTrue(lock.owns(c));
630	<	assertFalse(lock2.owns(c));
625	>	public void testSignal_IMSE() {
626	>	final Mutex sync = new Mutex();
627	>	final ConditionObject c = sync.newCondition();
628	>	try {
629	>	c.signal();
630	>	shouldThrow();
631	>	} catch (IllegalMonitorStateException success) {}
632	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
633		}
634
635		/**
636	<	* Calling await without holding lock throws IllegalMonitorStateException
636	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
637		*/
638	<	public void testAwait_IllegalMonitor() {
639	<	final Mutex lock = new Mutex();
640	<	final Condition c = lock.newCondition();
638	>	public void testSignalAll_IMSE() {
639	>	final Mutex sync = new Mutex();
640	>	final ConditionObject c = sync.newCondition();
641		try {
642	<	c.await();
642	>	c.signalAll();
643		shouldThrow();
644	<	}
416	<	catch (IllegalMonitorStateException success) {
417	<	}
418	<	catch (Exception ex) {
419	<	unexpectedException();
420	<	}
644	>	} catch (IllegalMonitorStateException success) {}
645		}
646
647		/**
648	<	* Calling signal without holding lock throws IllegalMonitorStateException
648	>	* await/awaitNanos/awaitUntil without a signal times out
649		*/
650	<	public void testSignal_IllegalMonitor() {
651	<	final Mutex lock = new Mutex();
652	<	final Condition c = lock.newCondition();
650	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
651	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
652	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
653	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
654	>	final Mutex sync = new Mutex();
655	>	final ConditionObject c = sync.newCondition();
656	>	sync.acquire();
657	>	assertAwaitTimesOut(c, awaitMethod);
658	>	sync.release();
659	>	}
660	>
661	>	/**
662	>	* await/awaitNanos/awaitUntil returns when signalled
663	>	*/
664	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
665	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
666	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
667	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
668	>	public void testSignal(final AwaitMethod awaitMethod) {
669	>	final Mutex sync = new Mutex();
670	>	final ConditionObject c = sync.newCondition();
671	>	final BooleanLatch acquired = new BooleanLatch();
672	>	Thread t = newStartedThread(new CheckedRunnable() {
673	>	public void realRun() throws InterruptedException {
674	>	sync.acquire();
675	>	assertTrue(acquired.releaseShared(0));
676	>	await(c, awaitMethod);
677	>	sync.release();
678	>	}});
679	>
680	>	acquired.acquireShared(0);
681	>	sync.acquire();
682	>	assertHasWaitersLocked(sync, c, t);
683	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
684	>	c.signal();
685	>	assertHasWaitersLocked(sync, c, NO_THREADS);
686	>	assertHasExclusiveQueuedThreads(sync, t);
687	>	sync.release();
688	>	awaitTermination(t);
689	>	}
690	>
691	>	/**
692	>	* hasWaiters(null) throws NullPointerException
693	>	*/
694	>	public void testHasWaitersNPE() {
695	>	final Mutex sync = new Mutex();
696		try {
697	<	c.signal();
697	>	sync.hasWaiters(null);
698		shouldThrow();
699	<	}
433	<	catch (IllegalMonitorStateException success) {
434	<	}
435	<	catch (Exception ex) {
436	<	unexpectedException();
437	<	}
699	>	} catch (NullPointerException success) {}
700		}
701
702		/**
703	<	* awaitNanos without a signal times out
703	>	* getWaitQueueLength(null) throws NullPointerException
704		*/
705	<	public void testAwaitNanos_Timeout() {
706	<	final Mutex lock = new Mutex();
445	<	final Condition c = lock.newCondition();
705	>	public void testGetWaitQueueLengthNPE() {
706	>	final Mutex sync = new Mutex();
707		try {
708	<	lock.acquireExclusiveUninterruptibly(1);
709	<	long t = c.awaitNanos(100);
710	<	assertTrue(t <= 0);
450	<	lock.releaseExclusive(1);
451	<	}
452	<	catch (Exception ex) {
453	<	unexpectedException();
454	<	}
708	>	sync.getWaitQueueLength(null);
709	>	shouldThrow();
710	>	} catch (NullPointerException success) {}
711		}
712
713		/**
714	<	*  timed await without a signal times out
714	>	* getWaitingThreads(null) throws NullPointerException
715		*/
716	<	public void testAwait_Timeout() {
717	<	final Mutex lock = new Mutex();
462	<	final Condition c = lock.newCondition();
716	>	public void testGetWaitingThreadsNPE() {
717	>	final Mutex sync = new Mutex();
718		try {
719	<	lock.acquireExclusiveUninterruptibly(1);
720	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
721	<	lock.releaseExclusive(1);
467	<	}
468	<	catch (Exception ex) {
469	<	unexpectedException();
470	<	}
719	>	sync.getWaitingThreads(null);
720	>	shouldThrow();
721	>	} catch (NullPointerException success) {}
722		}
723
724		/**
725	<	* awaitUntil without a signal times out
725	>	* hasWaiters throws IllegalArgumentException if not owned
726		*/
727	<	public void testAwaitUntil_Timeout() {
728	<	final Mutex lock = new Mutex();
729	<	final Condition c = lock.newCondition();
727	>	public void testHasWaitersIAE() {
728	>	final Mutex sync = new Mutex();
729	>	final ConditionObject c = sync.newCondition();
730	>	final Mutex sync2 = new Mutex();
731		try {
732	<	lock.acquireExclusiveUninterruptibly(1);
733	<	java.util.Date d = new java.util.Date();
734	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
735	<	lock.releaseExclusive(1);
484	<	}
485	<	catch (Exception ex) {
486	<	unexpectedException();
487	<	}
732	>	sync2.hasWaiters(c);
733	>	shouldThrow();
734	>	} catch (IllegalArgumentException success) {}
735	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
736		}
737
738		/**
739	<	* await returns when signalled
739	>	* hasWaiters throws IllegalMonitorStateException if not synced
740		*/
741	<	public void testAwait() {
742	<	final Mutex lock = new Mutex();
743	<	final Condition c = lock.newCondition();
744	<	Thread t = new Thread(new Runnable() {
745	<	public void run() {
746	<	try {
747	<	lock.acquireExclusiveUninterruptibly(1);
748	<	c.await();
749	<	lock.releaseExclusive(1);
502	<	}
503	<	catch(InterruptedException e) {
504	<	threadUnexpectedException();
505	<	}
506	<	}
507	<	});
741	>	public void testHasWaitersIMSE() {
742	>	final Mutex sync = new Mutex();
743	>	final ConditionObject c = sync.newCondition();
744	>	try {
745	>	sync.hasWaiters(c);
746	>	shouldThrow();
747	>	} catch (IllegalMonitorStateException success) {}
748	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
749	>	}
750
751	+	/**
752	+	* getWaitQueueLength throws IllegalArgumentException if not owned
753	+	*/
754	+	public void testGetWaitQueueLengthIAE() {
755	+	final Mutex sync = new Mutex();
756	+	final ConditionObject c = sync.newCondition();
757	+	final Mutex sync2 = new Mutex();
758		try {
759	<	t.start();
760	<	Thread.sleep(SHORT_DELAY_MS);
761	<	lock.acquireExclusiveUninterruptibly(1);
762	<	c.signal();
514	<	lock.releaseExclusive(1);
515	<	t.join(SHORT_DELAY_MS);
516	<	assertFalse(t.isAlive());
517	<	}
518	<	catch (Exception ex) {
519	<	unexpectedException();
520	<	}
759	>	sync2.getWaitQueueLength(c);
760	>	shouldThrow();
761	>	} catch (IllegalArgumentException success) {}
762	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
763		}
764
765		/**
766	<	* toString indicates current state
766	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
767		*/
768	<	public void testToString() {
769	<	Mutex lock = new Mutex();
770	<	String us = lock.toString();
771	<	assertTrue(us.indexOf("State = 0") >= 0);
772	<	lock.acquireExclusiveUninterruptibly(1);
773	<	String ls = lock.toString();
774	<	assertTrue(ls.indexOf("State = 1") >= 0);
768	>	public void testGetWaitQueueLengthIMSE() {
769	>	final Mutex sync = new Mutex();
770	>	final ConditionObject c = sync.newCondition();
771	>	try {
772	>	sync.getWaitQueueLength(c);
773	>	shouldThrow();
774	>	} catch (IllegalMonitorStateException success) {}
775	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
776		}
777
778		/**
779	<	* A serialized AQS deserializes with current state
779	>	* getWaitingThreads throws IllegalArgumentException if not owned
780		*/
781	<	public void testSerialization() {
782	<	Mutex l = new Mutex();
783	<	l.acquireExclusiveUninterruptibly(1);
784	<	assertTrue(l.isLocked());
781	>	public void testGetWaitingThreadsIAE() {
782	>	final Mutex sync = new Mutex();
783	>	final ConditionObject c = sync.newCondition();
784	>	final Mutex sync2 = new Mutex();
785	>	try {
786	>	sync2.getWaitingThreads(c);
787	>	shouldThrow();
788	>	} catch (IllegalArgumentException success) {}
789	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
790	>	}
791
792	+	/**
793	+	* getWaitingThreads throws IllegalMonitorStateException if not synced
794	+	*/
795	+	public void testGetWaitingThreadsIMSE() {
796	+	final Mutex sync = new Mutex();
797	+	final ConditionObject c = sync.newCondition();
798		try {
799	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
800	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
801	<	out.writeObject(l);
802	<	out.close();
799	>	sync.getWaitingThreads(c);
800	>	shouldThrow();
801	>	} catch (IllegalMonitorStateException success) {}
802	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
803	>	}
804
805	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
806	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
807	<	Mutex r = (Mutex) in.readObject();
808	<	assertTrue(r.isLocked());
809	<	} catch(Exception e){
810	<	e.printStackTrace();
811	<	unexpectedException();
812	<	}
805	>	/**
806	>	* hasWaiters returns true when a thread is waiting, else false
807	>	*/
808	>	public void testHasWaiters() {
809	>	final Mutex sync = new Mutex();
810	>	final ConditionObject c = sync.newCondition();
811	>	final BooleanLatch acquired = new BooleanLatch();
812	>	Thread t = newStartedThread(new CheckedRunnable() {
813	>	public void realRun() throws InterruptedException {
814	>	sync.acquire();
815	>	assertHasWaitersLocked(sync, c, NO_THREADS);
816	>	assertFalse(sync.hasWaiters(c));
817	>	assertTrue(acquired.releaseShared(0));
818	>	c.await();
819	>	sync.release();
820	>	}});
821	>
822	>	acquired.acquireShared(0);
823	>	sync.acquire();
824	>	assertHasWaitersLocked(sync, c, t);
825	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
826	>	assertTrue(sync.hasWaiters(c));
827	>	c.signal();
828	>	assertHasWaitersLocked(sync, c, NO_THREADS);
829	>	assertHasExclusiveQueuedThreads(sync, t);
830	>	assertFalse(sync.hasWaiters(c));
831	>	sync.release();
832	>
833	>	awaitTermination(t);
834	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
835	>	}
836	>
837	>	/**
838	>	* getWaitQueueLength returns number of waiting threads
839	>	*/
840	>	public void testGetWaitQueueLength() {
841	>	final Mutex sync = new Mutex();
842	>	final ConditionObject c = sync.newCondition();
843	>	final BooleanLatch acquired1 = new BooleanLatch();
844	>	final BooleanLatch acquired2 = new BooleanLatch();
845	>	final Thread t1 = newStartedThread(new CheckedRunnable() {
846	>	public void realRun() throws InterruptedException {
847	>	sync.acquire();
848	>	assertHasWaitersLocked(sync, c, NO_THREADS);
849	>	assertEquals(0, sync.getWaitQueueLength(c));
850	>	assertTrue(acquired1.releaseShared(0));
851	>	c.await();
852	>	sync.release();
853	>	}});
854	>	acquired1.acquireShared(0);
855	>	sync.acquire();
856	>	assertHasWaitersLocked(sync, c, t1);
857	>	assertEquals(1, sync.getWaitQueueLength(c));
858	>	sync.release();
859	>
860	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
861	>	public void realRun() throws InterruptedException {
862	>	sync.acquire();
863	>	assertHasWaitersLocked(sync, c, t1);
864	>	assertEquals(1, sync.getWaitQueueLength(c));
865	>	assertTrue(acquired2.releaseShared(0));
866	>	c.await();
867	>	sync.release();
868	>	}});
869	>	acquired2.acquireShared(0);
870	>	sync.acquire();
871	>	assertHasWaitersLocked(sync, c, t1, t2);
872	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
873	>	assertEquals(2, sync.getWaitQueueLength(c));
874	>	c.signalAll();
875	>	assertHasWaitersLocked(sync, c, NO_THREADS);
876	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
877	>	assertEquals(0, sync.getWaitQueueLength(c));
878	>	sync.release();
879	>
880	>	awaitTermination(t1);
881	>	awaitTermination(t2);
882	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
883	>	}
884	>
885	>	/**
886	>	* getWaitingThreads returns only and all waiting threads
887	>	*/
888	>	public void testGetWaitingThreads() {
889	>	final Mutex sync = new Mutex();
890	>	final ConditionObject c = sync.newCondition();
891	>	final BooleanLatch acquired1 = new BooleanLatch();
892	>	final BooleanLatch acquired2 = new BooleanLatch();
893	>	final Thread t1 = new Thread(new CheckedRunnable() {
894	>	public void realRun() throws InterruptedException {
895	>	sync.acquire();
896	>	assertHasWaitersLocked(sync, c, NO_THREADS);
897	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
898	>	assertTrue(acquired1.releaseShared(0));
899	>	c.await();
900	>	sync.release();
901	>	}});
902	>
903	>	final Thread t2 = new Thread(new CheckedRunnable() {
904	>	public void realRun() throws InterruptedException {
905	>	sync.acquire();
906	>	assertHasWaitersLocked(sync, c, t1);
907	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
908	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
909	>	assertEquals(1, sync.getWaitingThreads(c).size());
910	>	assertTrue(acquired2.releaseShared(0));
911	>	c.await();
912	>	sync.release();
913	>	}});
914	>
915	>	sync.acquire();
916	>	assertHasWaitersLocked(sync, c, NO_THREADS);
917	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
918	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
919	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
920	>	assertEquals(0, sync.getWaitingThreads(c).size());
921	>	sync.release();
922	>
923	>	t1.start();
924	>	acquired1.acquireShared(0);
925	>	sync.acquire();
926	>	assertHasWaitersLocked(sync, c, t1);
927	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
928	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
929	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
930	>	assertEquals(1, sync.getWaitingThreads(c).size());
931	>	sync.release();
932	>
933	>	t2.start();
934	>	acquired2.acquireShared(0);
935	>	sync.acquire();
936	>	assertHasWaitersLocked(sync, c, t1, t2);
937	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
938	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
939	>	assertTrue(sync.getWaitingThreads(c).contains(t2));
940	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
941	>	assertEquals(2, sync.getWaitingThreads(c).size());
942	>	c.signalAll();
943	>	assertHasWaitersLocked(sync, c, NO_THREADS);
944	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
945	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
946	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
947	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
948	>	assertEquals(0, sync.getWaitingThreads(c).size());
949	>	sync.release();
950	>
951	>	awaitTermination(t1);
952	>	awaitTermination(t2);
953	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
954	>	}
955	>
956	>	/**
957	>	* awaitUninterruptibly is uninterruptible
958	>	*/
959	>	public void testAwaitUninterruptibly() {
960	>	final Mutex sync = new Mutex();
961	>	final ConditionObject c = sync.newCondition();
962	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
963	>	Thread t = newStartedThread(new CheckedRunnable() {
964	>	public void realRun() {
965	>	sync.acquire();
966	>	assertTrue(pleaseInterrupt.releaseShared(0));
967	>	c.awaitUninterruptibly();
968	>	assertTrue(Thread.interrupted());
969	>	assertHasWaitersLocked(sync, c, NO_THREADS);
970	>	sync.release();
971	>	}});
972	>
973	>	pleaseInterrupt.acquireShared(0);
974	>	sync.acquire();
975	>	assertHasWaitersLocked(sync, c, t);
976	>	sync.release();
977	>	t.interrupt();
978	>	assertHasWaitersUnlocked(sync, c, t);
979	>	assertThreadStaysAlive(t);
980	>	sync.acquire();
981	>	assertHasWaitersLocked(sync, c, t);
982	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
983	>	c.signal();
984	>	assertHasWaitersLocked(sync, c, NO_THREADS);
985	>	assertHasExclusiveQueuedThreads(sync, t);
986	>	sync.release();
987	>	awaitTermination(t);
988	>	}
989	>
990	>	/**
991	>	* await/awaitNanos/awaitUntil is interruptible
992	>	*/
993	>	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
994	>	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
995	>	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
996	>	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
997	>	public void testInterruptible(final AwaitMethod awaitMethod) {
998	>	final Mutex sync = new Mutex();
999	>	final ConditionObject c = sync.newCondition();
1000	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
1001	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1002	>	public void realRun() throws InterruptedException {
1003	>	sync.acquire();
1004	>	assertTrue(pleaseInterrupt.releaseShared(0));
1005	>	await(c, awaitMethod);
1006	>	}});
1007	>
1008	>	pleaseInterrupt.acquireShared(0);
1009	>	t.interrupt();
1010	>	awaitTermination(t);
1011	>	}
1012	>
1013	>	/**
1014	>	* signalAll wakes up all threads
1015	>	*/
1016	>	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1017	>	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1018	>	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1019	>	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1020	>	public void testSignalAll(final AwaitMethod awaitMethod) {
1021	>	final Mutex sync = new Mutex();
1022	>	final ConditionObject c = sync.newCondition();
1023	>	final BooleanLatch acquired1 = new BooleanLatch();
1024	>	final BooleanLatch acquired2 = new BooleanLatch();
1025	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1026	>	public void realRun() throws InterruptedException {
1027	>	sync.acquire();
1028	>	acquired1.releaseShared(0);
1029	>	await(c, awaitMethod);
1030	>	sync.release();
1031	>	}});
1032	>
1033	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1034	>	public void realRun() throws InterruptedException {
1035	>	sync.acquire();
1036	>	acquired2.releaseShared(0);
1037	>	await(c, awaitMethod);
1038	>	sync.release();
1039	>	}});
1040	>
1041	>	acquired1.acquireShared(0);
1042	>	acquired2.acquireShared(0);
1043	>	sync.acquire();
1044	>	assertHasWaitersLocked(sync, c, t1, t2);
1045	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1046	>	c.signalAll();
1047	>	assertHasWaitersLocked(sync, c, NO_THREADS);
1048	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
1049	>	sync.release();
1050	>	awaitTermination(t1);
1051	>	awaitTermination(t2);
1052		}
1053
1054	+	/**
1055	+	* toString indicates current state
1056	+	*/
1057	+	public void testToString() {
1058	+	Mutex sync = new Mutex();
1059	+	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1060	+	sync.acquire();
1061	+	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1062	+	}
1063
1064		/**
1065	<	* Latch isSignalled initially returns false, then true after release
1065	>	* A serialized AQS deserializes with current state, but no queued threads
1066		*/
1067	<	public void testLatchIsSignalled() {
1068	<	final BooleanLatch l = new BooleanLatch();
1069	<	assertFalse(l.isSignalled());
1070	<	l.releaseShared(0);
1071	<	assertTrue(l.isSignalled());
1067	>	public void testSerialization() {
1068	>	Mutex sync = new Mutex();
1069	>	assertFalse(serialClone(sync).isHeldExclusively());
1070	>	sync.acquire();
1071	>	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1072	>	waitForQueuedThread(sync, t);
1073	>	assertTrue(sync.isHeldExclusively());
1074	>
1075	>	Mutex clone = serialClone(sync);
1076	>	assertTrue(clone.isHeldExclusively());
1077	>	assertHasExclusiveQueuedThreads(sync, t);
1078	>	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1079	>	t.interrupt();
1080	>	awaitTermination(t);
1081	>	sync.release();
1082	>	assertFalse(sync.isHeldExclusively());
1083	>	assertTrue(clone.isHeldExclusively());
1084	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1085	>	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1086		}
1087
1088		/**
1089	<	* release and has no effect when already signalled
1089	>	* tryReleaseShared setting state changes getState
1090	>	*/
1091	>	public void testGetStateWithReleaseShared() {
1092	>	final BooleanLatch l = new BooleanLatch();
1093	>	assertFalse(l.isSignalled());
1094	>	assertTrue(l.releaseShared(0));
1095	>	assertTrue(l.isSignalled());
1096	>	}
1097	>
1098	>	/**
1099	>	* releaseShared has no effect when already signalled
1100		*/
1101		public void testReleaseShared() {
1102	<	final BooleanLatch l = new BooleanLatch();
1103	<	assertFalse(l.isSignalled());
1104	<	l.releaseShared(0);
1105	<	assertTrue(l.isSignalled());
1106	<	l.releaseShared(0);
1107	<	assertTrue(l.isSignalled());
1102	>	final BooleanLatch l = new BooleanLatch();
1103	>	assertFalse(l.isSignalled());
1104	>	assertTrue(l.releaseShared(0));
1105	>	assertTrue(l.isSignalled());
1106	>	assertTrue(l.releaseShared(0));
1107	>	assertTrue(l.isSignalled());
1108		}
1109
1110		/**
1111		* acquireSharedInterruptibly returns after release, but not before
1112		*/
1113		public void testAcquireSharedInterruptibly() {
1114	<	final BooleanLatch l = new BooleanLatch();
1114	>	final BooleanLatch l = new BooleanLatch();
1115
1116	<	Thread t = new Thread(new Runnable() {
1117	<	public void run() {
1118	<	try {
1119	<	threadAssertFalse(l.isSignalled());
1120	<	l.acquireSharedInterruptibly(0);
1121	<	threadAssertTrue(l.isSignalled());
1122	<	} catch(InterruptedException e){
1123	<	threadUnexpectedException();
1124	<	}
1125	<	}
1126	<	});
1127	<	try {
1128	<	t.start();
1129	<	assertFalse(l.isSignalled());
1130	<	Thread.sleep(SHORT_DELAY_MS);
1131	<	l.releaseShared(0);
604	<	assertTrue(l.isSignalled());
605	<	t.join();
606	<	} catch (InterruptedException e){
607	<	unexpectedException();
608	<	}
609	<	}
610	<
611	<
612	<	/**
613	<	* acquireSharedTimed returns after release
614	<	*/
615	<	public void testAsquireSharedTimed() {
616	<	final BooleanLatch l = new BooleanLatch();
617	<
618	<	Thread t = new Thread(new Runnable() {
619	<	public void run() {
620	<	try {
621	<	threadAssertFalse(l.isSignalled());
622	<	threadAssertTrue(l.acquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
623	<	threadAssertTrue(l.isSignalled());
624	<
625	<	} catch(InterruptedException e){
626	<	threadUnexpectedException();
627	<	}
628	<	}
629	<	});
630	<	try {
631	<	t.start();
632	<	assertFalse(l.isSignalled());
633	<	Thread.sleep(SHORT_DELAY_MS);
634	<	l.releaseShared(0);
635	<	assertTrue(l.isSignalled());
636	<	t.join();
637	<	} catch (InterruptedException e){
638	<	unexpectedException();
639	<	}
1116	>	Thread t = newStartedThread(new CheckedRunnable() {
1117	>	public void realRun() throws InterruptedException {
1118	>	assertFalse(l.isSignalled());
1119	>	l.acquireSharedInterruptibly(0);
1120	>	assertTrue(l.isSignalled());
1121	>	l.acquireSharedInterruptibly(0);
1122	>	assertTrue(l.isSignalled());
1123	>	}});
1124	>
1125	>	waitForQueuedThread(l, t);
1126	>	assertFalse(l.isSignalled());
1127	>	assertThreadStaysAlive(t);
1128	>	assertHasSharedQueuedThreads(l, t);
1129	>	assertTrue(l.releaseShared(0));
1130	>	assertTrue(l.isSignalled());
1131	>	awaitTermination(t);
1132		}
1133	<
1133	>
1134		/**
1135	<	* acquireSharedInterruptibly throws IE if interrupted before released
1135	>	* tryAcquireSharedNanos returns after release, but not before
1136		*/
1137	<	public void testAcquireSharedInterruptibly_InterruptedException() {
1137	>	public void testTryAcquireSharedNanos() {
1138		final BooleanLatch l = new BooleanLatch();
1139	<	Thread t = new Thread(new Runnable() {
1140	<	public void run() {
1141	<	try {
1142	<	threadAssertFalse(l.isSignalled());
1143	<	l.acquireSharedInterruptibly(0);
1144	<	threadShouldThrow();
1145	<	} catch(InterruptedException success){}
1146	<	}
1147	<	});
1148	<	t.start();
1149	<	try {
1150	<	assertFalse(l.isSignalled());
1151	<	t.interrupt();
1152	<	t.join();
1153	<	} catch (InterruptedException e){
1154	<	unexpectedException();
1155	<	}
1139	>
1140	>	Thread t = newStartedThread(new CheckedRunnable() {
1141	>	public void realRun() throws InterruptedException {
1142	>	assertFalse(l.isSignalled());
1143	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1144	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1145	>	assertTrue(l.isSignalled());
1146	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1147	>	assertTrue(l.isSignalled());
1148	>	}});
1149	>
1150	>	waitForQueuedThread(l, t);
1151	>	assertFalse(l.isSignalled());
1152	>	assertThreadStaysAlive(t);
1153	>	assertTrue(l.releaseShared(0));
1154	>	assertTrue(l.isSignalled());
1155	>	awaitTermination(t);
1156		}
1157
1158		/**
1159	<	* acquireSharedTimed throws IE if interrupted before released
1159	>	* acquireSharedInterruptibly is interruptible
1160		*/
1161	<	public void testAcquireSharedNanos_InterruptedException() {
1161	>	public void testAcquireSharedInterruptibly_Interruptible() {
1162		final BooleanLatch l = new BooleanLatch();
1163	<	Thread t = new Thread(new Runnable() {
1164	<	public void run() {
1165	<	try {
1166	<	threadAssertFalse(l.isSignalled());
1167	<	l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
1168	<	threadShouldThrow();
1169	<	} catch(InterruptedException success){}
1170	<	}
1171	<	});
1172	<	t.start();
1173	<	try {
1174	<	Thread.sleep(SHORT_DELAY_MS);
1175	<	assertFalse(l.isSignalled());
1176	<	t.interrupt();
1177	<	t.join();
1178	<	} catch (InterruptedException e){
1179	<	unexpectedException();
1180	<	}
1163	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1164	>	public void realRun() throws InterruptedException {
1165	>	assertFalse(l.isSignalled());
1166	>	l.acquireSharedInterruptibly(0);
1167	>	}});
1168	>
1169	>	waitForQueuedThread(l, t);
1170	>	assertFalse(l.isSignalled());
1171	>	t.interrupt();
1172	>	awaitTermination(t);
1173	>	assertFalse(l.isSignalled());
1174	>	}
1175	>
1176	>	/**
1177	>	* tryAcquireSharedNanos is interruptible
1178	>	*/
1179	>	public void testTryAcquireSharedNanos_Interruptible() {
1180	>	final BooleanLatch l = new BooleanLatch();
1181	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1182	>	public void realRun() throws InterruptedException {
1183	>	assertFalse(l.isSignalled());
1184	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1185	>	l.tryAcquireSharedNanos(0, nanos);
1186	>	}});
1187	>
1188	>	waitForQueuedThread(l, t);
1189	>	assertFalse(l.isSignalled());
1190	>	t.interrupt();
1191	>	awaitTermination(t);
1192	>	assertFalse(l.isSignalled());
1193		}
1194
1195		/**
1196	<	* acquireSharedTimed times out if not released before timeout
1196	>	* tryAcquireSharedNanos times out if not released before timeout
1197		*/
1198	<	public void testAcquireSharedNanos_Timeout() {
1198	>	public void testTryAcquireSharedNanos_Timeout() {
1199		final BooleanLatch l = new BooleanLatch();
1200	<	Thread t = new Thread(new Runnable() {
1201	<	public void run() {
1202	<	try {
1203	<	threadAssertFalse(l.isSignalled());
1204	<	threadAssertFalse(l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1205	<	} catch(InterruptedException ie){
1206	<	threadUnexpectedException();
1207	<	}
1200	>	final BooleanLatch observedQueued = new BooleanLatch();
1201	>	final long timeoutMillis = timeoutMillis();
1202	>	Thread t = newStartedThread(new CheckedRunnable() {
1203	>	public void realRun() throws InterruptedException {
1204	>	assertFalse(l.isSignalled());
1205	>	for (long millis = timeoutMillis();
1206	>	!observedQueued.isSignalled();
1207	>	millis *= 2) {
1208	>	long nanos = MILLISECONDS.toNanos(millis);
1209	>	long startTime = System.nanoTime();
1210	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1211	>	assertTrue(millisElapsedSince(startTime) >= millis);
1212		}
1213	<	});
1214	<	t.start();
1215	<	try {
1216	<	Thread.sleep(SHORT_DELAY_MS);
1217	<	assertFalse(l.isSignalled());
1218	<	t.join();
1219	<	} catch (InterruptedException e){
1220	<	unexpectedException();
1221	<	}
1213	>	assertFalse(l.isSignalled());
1214	>	}});
1215	>
1216	>	waitForQueuedThread(l, t);
1217	>	observedQueued.releaseShared(0);
1218	>	assertFalse(l.isSignalled());
1219	>	awaitTermination(t);
1220	>	assertFalse(l.isSignalled());
1221	>	}
1222	>
1223	>	/**
1224	>	* awaitNanos/timed await with 0 wait times out immediately
1225	>	*/
1226	>	public void testAwait_Zero() throws InterruptedException {
1227	>	final Mutex sync = new Mutex();
1228	>	final ConditionObject c = sync.newCondition();
1229	>	sync.acquire();
1230	>	assertTrue(c.awaitNanos(0L) <= 0);
1231	>	assertFalse(c.await(0L, NANOSECONDS));
1232	>	sync.release();
1233	>	}
1234	>
1235	>	/**
1236	>	* awaitNanos/timed await with maximum negative wait times does not underflow
1237	>	*/
1238	>	public void testAwait_NegativeInfinity() throws InterruptedException {
1239	>	final Mutex sync = new Mutex();
1240	>	final ConditionObject c = sync.newCondition();
1241	>	sync.acquire();
1242	>	assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
1243	>	assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
1244	>	sync.release();
1245		}
1246
716	–
1247		}

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