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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.10 by dl, Wed Jan 7 20:49:53 2004 UTC vs.
Revision 1.43 by jsr166, Fri Jan 18 04:23:28 2013 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	–
9		import junit.framework.*;
10		import java.util.*;
11	<	import java.util.concurrent.*;
12	<	import java.util.concurrent.locks.*;
13	<	import java.io.*;
11	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
12	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer;
13	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject;
14
15		public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run(suite());
18		}
19		public static Test suite() {
20		return new TestSuite(AbstractQueuedSynchronizerTest.class);
21		}
22
23		/**
24	<	* A simple mutex class, from the AbstractQueuedSynchronizer
25	<	* javadoc.  All tests exercise this as a sample user extension.
26	<	* Other methods/features of AbstractQueuedSynchronizerTest are
27	<	* tested implicitly in ReentrantLock, ReentrantReadWriteLock, and
28	<	* Semaphore test classes
29	<	*/
30	<	static class Mutex implements Lock, java.io.Serializable {
31	<	private static class Sync extends AbstractQueuedSynchronizer {
32	<	boolean isLocked() { return getState() == 1; }
33	<
34	<	public boolean tryAcquireExclusive(int acquires) {
36	<	assert acquires == 1; // Does not use multiple acquires
37	<	return compareAndSetState(0, 1);
38	<	}
39	<
40	<	public boolean tryReleaseExclusive(int releases) {
41	<	setState(0);
42	<	return true;
43	<	}
44	<
45	<	public void checkConditionAccess(Thread thread) {
46	<	if (getState() == 0) throw new IllegalMonitorStateException();
47	<	}
48	<
49	<	Condition newCondition() { return new ConditionObject(); }
50	<
51	<	private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
52	<	s.defaultReadObject();
53	<	setState(0); // reset to unlocked state
54	<	}
24	>	* A simple mutex class, adapted from the class javadoc.  Exclusive
25	>	* acquire tests exercise this as a sample user extension.  Other
26	>	* methods/features of AbstractQueuedSynchronizer are tested via
27	>	* other test classes, including those for ReentrantLock,
28	>	* ReentrantReadWriteLock, and Semaphore.
29	>	*/
30	>	static class Mutex extends AbstractQueuedSynchronizer {
31	>	/** An eccentric value for locked synchronizer state. */
32	>	static final int LOCKED = (1 << 31) | (1 << 15);
33	>
34	>	static final int UNLOCKED = 0;
35
36	+	@Override public boolean isHeldExclusively() {
37	+	int state = getState();
38	+	assertTrue(state == UNLOCKED || state == LOCKED);
39	+	return state == LOCKED;
40		}
41	<
42	<	private final Sync sync = new Sync();
43	<	public boolean tryLock() {
44	<	return sync.tryAcquireExclusive(1);
41	>
42	>	@Override public boolean tryAcquire(int acquires) {
43	>	assertEquals(LOCKED, acquires);
44	>	return compareAndSetState(UNLOCKED, LOCKED);
45		}
46	<	public void lock() {
47	<	sync.acquireExclusiveUninterruptibly(1);
46	>
47	>	@Override public boolean tryRelease(int releases) {
48	>	if (getState() != LOCKED) throw new IllegalMonitorStateException();
49	>	assertEquals(LOCKED, releases);
50	>	setState(UNLOCKED);
51	>	return true;
52		}
53	<	public void lockInterruptibly() throws InterruptedException {
54	<	sync.acquireExclusiveInterruptibly(1);
53	>
54	>	public boolean tryAcquireNanos(long nanos) throws InterruptedException {
55	>	return tryAcquireNanos(LOCKED, nanos);
56	>	}
57	>
58	>	public boolean tryAcquire() {
59	>	return tryAcquire(LOCKED);
60	>	}
61	>
62	>	public boolean tryRelease() {
63	>	return tryRelease(LOCKED);
64	>	}
65	>
66	>	public void acquire() {
67	>	acquire(LOCKED);
68		}
69	<	public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException {
70	<	return sync.acquireExclusiveTimed(1, unit.toNanos(timeout));
69	>
70	>	public void acquireInterruptibly() throws InterruptedException {
71	>	acquireInterruptibly(LOCKED);
72	>	}
73	>
74	>	public void release() {
75	>	release(LOCKED);
76	>	}
77	>
78	>	public ConditionObject newCondition() {
79	>	return new ConditionObject();
80		}
71	–	public void unlock() { sync.releaseExclusive(1); }
72	–	public Condition newCondition() { return sync.newCondition(); }
73	–	public boolean isLocked() { return sync.isLocked(); }
74	–	public boolean hasQueuedThreads() { return sync.hasQueuedThreads(); }
75	–	public boolean hasContended() { return sync.hasContended(); }
76	–	public boolean isQueued(Thread t) { return sync.isQueued(t); }
81		}
82
83		/**
84	<	* A runnable calling lockInterruptibly
84	>	* A simple latch class, to test shared mode.
85		*/
86	<	class InterruptibleLockRunnable implements Runnable {
87	<	final Mutex lock;
88	<	InterruptibleLockRunnable(Mutex l) { lock = l; }
89	<	public void run() {
90	<	try {
91	<	lock.lockInterruptibly();
92	<	} catch(InterruptedException success){}
86	>	static class BooleanLatch extends AbstractQueuedSynchronizer {
87	>	public boolean isSignalled() { return getState() != 0; }
88	>
89	>	public int tryAcquireShared(int ignore) {
90	>	return isSignalled() ? 1 : -1;
91	>	}
92	>
93	>	public boolean tryReleaseShared(int ignore) {
94	>	setState(1);
95	>	return true;
96		}
97		}
98
99	+	/**
100	+	* A runnable calling acquireInterruptibly that does not expect to
101	+	* be interrupted.
102	+	*/
103	+	class InterruptibleSyncRunnable extends CheckedRunnable {
104	+	final Mutex sync;
105	+	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
106	+	public void realRun() throws InterruptedException {
107	+	sync.acquireInterruptibly();
108	+	}
109	+	}
110
111		/**
112	<	* A runnable calling lockInterruptibly that expects to be
113	<	* interrupted
112	>	* A runnable calling acquireInterruptibly that expects to be
113	>	* interrupted.
114		*/
115	<	class InterruptedLockRunnable implements Runnable {
116	<	final Mutex lock;
117	<	InterruptedLockRunnable(Mutex l) { lock = l; }
118	<	public void run() {
119	<	try {
102	<	lock.lockInterruptibly();
103	<	threadShouldThrow();
104	<	} catch(InterruptedException success){}
115	>	class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
116	>	final Mutex sync;
117	>	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
118	>	public void realRun() throws InterruptedException {
119	>	sync.acquireInterruptibly();
120		}
121		}
122	<
122	>
123	>	/** A constant to clarify calls to checking methods below. */
124	>	static final Thread[] NO_THREADS = new Thread[0];
125	>
126		/**
127	<	* locking an unlocked lock succeeds
127	>	* Spin-waits until sync.isQueued(t) becomes true.
128		*/
129	<	public void testLock() {
130	<	Mutex rl = new Mutex();
131	<	rl.lock();
132	<	assertTrue(rl.isLocked());
133	<	rl.unlock();
129	>	void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) {
130	>	long startTime = System.nanoTime();
131	>	while (!sync.isQueued(t)) {
132	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
133	>	throw new AssertionFailedError("timed out");
134	>	Thread.yield();
135	>	}
136	>	assertTrue(t.isAlive());
137		}
138
139		/**
140	<	* tryLock on an unlocked lock succeeds
140	>	* Checks that sync has exactly the given queued threads.
141		*/
142	<	public void testTryLock() {
143	<	Mutex rl = new Mutex();
144	<	assertTrue(rl.tryLock());
145	<	assertTrue(rl.isLocked());
146	<	rl.unlock();
142	>	void assertHasQueuedThreads(AbstractQueuedSynchronizer sync,
143	>	Thread... expected) {
144	>	Collection<Thread> actual = sync.getQueuedThreads();
145	>	assertEquals(expected.length > 0, sync.hasQueuedThreads());
146	>	assertEquals(expected.length, sync.getQueueLength());
147	>	assertEquals(expected.length, actual.size());
148	>	assertEquals(expected.length == 0, actual.isEmpty());
149	>	assertEquals(new HashSet<Thread>(actual),
150	>	new HashSet<Thread>(Arrays.asList(expected)));
151		}
152
153		/**
154	<	* hasQueuedThreads reports whether there are waiting threads
154	>	* Checks that sync has exactly the given (exclusive) queued threads.
155		*/
156	<	public void testhasQueuedThreads() {
157	<	final Mutex lock = new Mutex();
158	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
159	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
160	<	try {
161	<	assertFalse(lock.hasQueuedThreads());
162	<	lock.lock();
163	<	t1.start();
164	<	Thread.sleep(SHORT_DELAY_MS);
165	<	assertTrue(lock.hasQueuedThreads());
166	<	t2.start();
167	<	Thread.sleep(SHORT_DELAY_MS);
168	<	assertTrue(lock.hasQueuedThreads());
169	<	t1.interrupt();
170	<	Thread.sleep(SHORT_DELAY_MS);
171	<	assertTrue(lock.hasQueuedThreads());
172	<	lock.unlock();
173	<	Thread.sleep(SHORT_DELAY_MS);
174	<	assertFalse(lock.hasQueuedThreads());
175	<	t1.join();
176	<	t2.join();
177	<	} catch(Exception e){
178	<	unexpectedException();
179	<	}
180	<	}
181	<
182	<	/**
183	<	* isQueued reports whether a thread is queued.
184	<	*/
185	<	public void testIsQueued() {
186	<	final Mutex lock = new Mutex();
187	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
188	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
189	<	try {
190	<	assertFalse(lock.isQueued(t1));
191	<	assertFalse(lock.isQueued(t2));
192	<	lock.lock();
193	<	t1.start();
194	<	Thread.sleep(SHORT_DELAY_MS);
195	<	assertTrue(lock.isQueued(t1));
196	<	t2.start();
197	<	Thread.sleep(SHORT_DELAY_MS);
198	<	assertTrue(lock.isQueued(t1));
174	<	assertTrue(lock.isQueued(t2));
175	<	t1.interrupt();
176	<	Thread.sleep(SHORT_DELAY_MS);
177	<	assertFalse(lock.isQueued(t1));
178	<	assertTrue(lock.isQueued(t2));
179	<	lock.unlock();
180	<	Thread.sleep(SHORT_DELAY_MS);
181	<	assertFalse(lock.isQueued(t1));
182	<	assertFalse(lock.isQueued(t2));
183	<	t1.join();
184	<	t2.join();
185	<	} catch(Exception e){
186	<	unexpectedException();
187	<	}
188	<	}
189	<
190	<
191	<	/**
192	<	* hasContended reports whether there has been contention
193	<	*/
194	<	public void testhasContended() {
195	<	final Mutex lock = new Mutex();
196	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
197	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
198	<	try {
199	<	assertFalse(lock.hasContended());
200	<	lock.lock();
201	<	t1.start();
202	<	Thread.sleep(SHORT_DELAY_MS);
203	<	assertTrue(lock.hasContended());
204	<	t2.start();
205	<	Thread.sleep(SHORT_DELAY_MS);
206	<	assertTrue(lock.hasContended());
207	<	t1.interrupt();
208	<	Thread.sleep(SHORT_DELAY_MS);
209	<	assertTrue(lock.hasContended());
210	<	lock.unlock();
211	<	Thread.sleep(SHORT_DELAY_MS);
212	<	assertTrue(lock.hasContended());
213	<	t1.join();
214	<	t2.join();
215	<	} catch(Exception e){
216	<	unexpectedException();
217	<	}
218	<	}
219	<
220	<	/**
221	<	* timed tryLock is interruptible.
222	<	*/
223	<	public void testInterruptedException2() {
224	<	final Mutex lock = new Mutex();
225	<	lock.lock();
226	<	Thread t = new Thread(new Runnable() {
227	<	public void run() {
228	<	try {
229	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
230	<	threadShouldThrow();
231	<	} catch(InterruptedException success){}
232	<	}
233	<	});
234	<	try {
235	<	t.start();
236	<	t.interrupt();
237	<	} catch(Exception e){
238	<	unexpectedException();
239	<	}
156	>	void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync,
157	>	Thread... expected) {
158	>	assertHasQueuedThreads(sync, expected);
159	>	assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()),
160	>	new HashSet<Thread>(sync.getQueuedThreads()));
161	>	assertEquals(0, sync.getSharedQueuedThreads().size());
162	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
163	>	}
164	>
165	>	/**
166	>	* Checks that sync has exactly the given (shared) queued threads.
167	>	*/
168	>	void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync,
169	>	Thread... expected) {
170	>	assertHasQueuedThreads(sync, expected);
171	>	assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()),
172	>	new HashSet<Thread>(sync.getQueuedThreads()));
173	>	assertEquals(0, sync.getExclusiveQueuedThreads().size());
174	>	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
175	>	}
176	>
177	>	/**
178	>	* Checks that condition c has exactly the given waiter threads,
179	>	* after acquiring mutex.
180	>	*/
181	>	void assertHasWaitersUnlocked(Mutex sync, ConditionObject c,
182	>	Thread... threads) {
183	>	sync.acquire();
184	>	assertHasWaitersLocked(sync, c, threads);
185	>	sync.release();
186	>	}
187	>
188	>	/**
189	>	* Checks that condition c has exactly the given waiter threads.
190	>	*/
191	>	void assertHasWaitersLocked(Mutex sync, ConditionObject c,
192	>	Thread... threads) {
193	>	assertEquals(threads.length > 0, sync.hasWaiters(c));
194	>	assertEquals(threads.length, sync.getWaitQueueLength(c));
195	>	assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty());
196	>	assertEquals(threads.length, sync.getWaitingThreads(c).size());
197	>	assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)),
198	>	new HashSet<Thread>(Arrays.asList(threads)));
199		}
200
201	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
202
203		/**
204	<	* TryLock on a locked lock fails
205	<	*/
206	<	public void testTryLockWhenLocked() {
207	<	final Mutex lock = new Mutex();
208	<	lock.lock();
209	<	Thread t = new Thread(new Runnable() {
210	<	public void run() {
211	<	threadAssertFalse(lock.tryLock());
212	<	}
213	<	});
214	<	try {
215	<	t.start();
216	<	t.join();
217	<	lock.unlock();
218	<	} catch(Exception e){
219	<	unexpectedException();
220	<	}
221	<	}
222	<
223	<	/**
264	<	* Timed tryLock on a locked lock times out
265	<	*/
266	<	public void testTryLock_Timeout() {
267	<	final Mutex lock = new Mutex();
268	<	lock.lock();
269	<	Thread t = new Thread(new Runnable() {
270	<	public void run() {
271	<	try {
272	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
273	<	} catch (Exception ex) {
274	<	threadUnexpectedException();
275	<	}
276	<	}
277	<	});
278	<	try {
279	<	t.start();
280	<	t.join();
281	<	lock.unlock();
282	<	} catch(Exception e){
283	<	unexpectedException();
284	<	}
285	<	}
286	<
287	<
288	<	/**
289	<	* isLocked is true when locked and false when not
290	<	*/
291	<	public void testIsLocked() {
292	<	final Mutex lock = new Mutex();
293	<	lock.lock();
294	<	assertTrue(lock.isLocked());
295	<	lock.unlock();
296	<	assertFalse(lock.isLocked());
297	<	Thread t = new Thread(new Runnable() {
298	<	public void run() {
299	<	lock.lock();
300	<	try {
301	<	Thread.sleep(SMALL_DELAY_MS);
302	<	}
303	<	catch(Exception e) {
304	<	threadUnexpectedException();
305	<	}
306	<	lock.unlock();
307	<	}
308	<	});
309	<	try {
310	<	t.start();
311	<	Thread.sleep(SHORT_DELAY_MS);
312	<	assertTrue(lock.isLocked());
313	<	t.join();
314	<	assertFalse(lock.isLocked());
315	<	} catch(Exception e){
316	<	unexpectedException();
204	>	* Awaits condition using the specified AwaitMethod.
205	>	*/
206	>	void await(ConditionObject c, AwaitMethod awaitMethod)
207	>	throws InterruptedException {
208	>	long timeoutMillis = 2 * LONG_DELAY_MS;
209	>	switch (awaitMethod) {
210	>	case await:
211	>	c.await();
212	>	break;
213	>	case awaitTimed:
214	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
215	>	break;
216	>	case awaitNanos:
217	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
218	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
219	>	assertTrue(nanosRemaining > 0);
220	>	break;
221	>	case awaitUntil:
222	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
223	>	break;
224		}
225		}
226
227	+	/**
228	+	* Checks that awaiting the given condition times out (using the
229	+	* default timeout duration).
230	+	*/
231	+	void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
232	+	long timeoutMillis = timeoutMillis();
233	+	long startTime = System.nanoTime();
234	+	try {
235	+	switch (awaitMethod) {
236	+	case awaitTimed:
237	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
238	+	break;
239	+	case awaitNanos:
240	+	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
241	+	long nanosRemaining = c.awaitNanos(nanosTimeout);
242	+	assertTrue(nanosRemaining <= 0);
243	+	break;
244	+	case awaitUntil:
245	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
246	+	break;
247	+	default:
248	+	throw new UnsupportedOperationException();
249	+	}
250	+	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
251	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
252	+	}
253	+
254	+	/**
255	+	* isHeldExclusively is false upon construction
256	+	*/
257	+	public void testIsHeldExclusively() {
258	+	Mutex sync = new Mutex();
259	+	assertFalse(sync.isHeldExclusively());
260	+	}
261	+
262	+	/**
263	+	* acquiring released sync succeeds
264	+	*/
265	+	public void testAcquire() {
266	+	Mutex sync = new Mutex();
267	+	sync.acquire();
268	+	assertTrue(sync.isHeldExclusively());
269	+	sync.release();
270	+	assertFalse(sync.isHeldExclusively());
271	+	}
272
273		/**
274	<	* lockInterruptibly is interruptible.
275	<	*/
276	<	public void testLockInterruptibly1() {
277	<	final Mutex lock = new Mutex();
278	<	lock.lock();
279	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
280	<	try {
281	<	t.start();
282	<	t.interrupt();
283	<	lock.unlock();
284	<	t.join();
285	<	} catch(Exception e){
286	<	unexpectedException();
287	<	}
288	<	}
289	<
290	<	/**
291	<	* lockInterruptibly succeeds when unlocked, else is interruptible
292	<	*/
293	<	public void testLockInterruptibly2() {
294	<	final Mutex lock = new Mutex();
295	<	try {
296	<	lock.lockInterruptibly();
297	<	} catch(Exception e) {
298	<	unexpectedException();
299	<	}
300	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
301	<	try {
302	<	t.start();
303	<	t.interrupt();
304	<	assertTrue(lock.isLocked());
305	<	t.join();
306	<	} catch(Exception e){
307	<	unexpectedException();
308	<	}
309	<	}
358	<
359	<	/**
360	<	* Calling await without holding lock throws IllegalMonitorStateException
361	<	*/
362	<	public void testAwait_IllegalMonitor() {
363	<	final Mutex lock = new Mutex();
364	<	final Condition c = lock.newCondition();
274	>	* tryAcquire on a released sync succeeds
275	>	*/
276	>	public void testTryAcquire() {
277	>	Mutex sync = new Mutex();
278	>	assertTrue(sync.tryAcquire());
279	>	assertTrue(sync.isHeldExclusively());
280	>	sync.release();
281	>	assertFalse(sync.isHeldExclusively());
282	>	}
283	>
284	>	/**
285	>	* hasQueuedThreads reports whether there are waiting threads
286	>	*/
287	>	public void testHasQueuedThreads() {
288	>	final Mutex sync = new Mutex();
289	>	assertFalse(sync.hasQueuedThreads());
290	>	sync.acquire();
291	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
292	>	waitForQueuedThread(sync, t1);
293	>	assertTrue(sync.hasQueuedThreads());
294	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
295	>	waitForQueuedThread(sync, t2);
296	>	assertTrue(sync.hasQueuedThreads());
297	>	t1.interrupt();
298	>	awaitTermination(t1);
299	>	assertTrue(sync.hasQueuedThreads());
300	>	sync.release();
301	>	awaitTermination(t2);
302	>	assertFalse(sync.hasQueuedThreads());
303	>	}
304	>
305	>	/**
306	>	* isQueued(null) throws NullPointerException
307	>	*/
308	>	public void testIsQueuedNPE() {
309	>	final Mutex sync = new Mutex();
310		try {
311	<	c.await();
311	>	sync.isQueued(null);
312		shouldThrow();
313	<	}
314	<	catch (IllegalMonitorStateException success) {
315	<	}
316	<	catch (Exception ex) {
317	<	unexpectedException();
313	>	} catch (NullPointerException success) {}
314	>	}
315	>
316	>	/**
317	>	* isQueued reports whether a thread is queued
318	>	*/
319	>	public void testIsQueued() {
320	>	final Mutex sync = new Mutex();
321	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
322	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
323	>	assertFalse(sync.isQueued(t1));
324	>	assertFalse(sync.isQueued(t2));
325	>	sync.acquire();
326	>	t1.start();
327	>	waitForQueuedThread(sync, t1);
328	>	assertTrue(sync.isQueued(t1));
329	>	assertFalse(sync.isQueued(t2));
330	>	t2.start();
331	>	waitForQueuedThread(sync, t2);
332	>	assertTrue(sync.isQueued(t1));
333	>	assertTrue(sync.isQueued(t2));
334	>	t1.interrupt();
335	>	awaitTermination(t1);
336	>	assertFalse(sync.isQueued(t1));
337	>	assertTrue(sync.isQueued(t2));
338	>	sync.release();
339	>	awaitTermination(t2);
340	>	assertFalse(sync.isQueued(t1));
341	>	assertFalse(sync.isQueued(t2));
342	>	}
343	>
344	>	/**
345	>	* getFirstQueuedThread returns first waiting thread or null if none
346	>	*/
347	>	public void testGetFirstQueuedThread() {
348	>	final Mutex sync = new Mutex();
349	>	assertNull(sync.getFirstQueuedThread());
350	>	sync.acquire();
351	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
352	>	waitForQueuedThread(sync, t1);
353	>	assertEquals(t1, sync.getFirstQueuedThread());
354	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
355	>	waitForQueuedThread(sync, t2);
356	>	assertEquals(t1, sync.getFirstQueuedThread());
357	>	t1.interrupt();
358	>	awaitTermination(t1);
359	>	assertEquals(t2, sync.getFirstQueuedThread());
360	>	sync.release();
361	>	awaitTermination(t2);
362	>	assertNull(sync.getFirstQueuedThread());
363	>	}
364	>
365	>	/**
366	>	* hasContended reports false if no thread has ever blocked, else true
367	>	*/
368	>	public void testHasContended() {
369	>	final Mutex sync = new Mutex();
370	>	assertFalse(sync.hasContended());
371	>	sync.acquire();
372	>	assertFalse(sync.hasContended());
373	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
374	>	waitForQueuedThread(sync, t1);
375	>	assertTrue(sync.hasContended());
376	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
377	>	waitForQueuedThread(sync, t2);
378	>	assertTrue(sync.hasContended());
379	>	t1.interrupt();
380	>	awaitTermination(t1);
381	>	assertTrue(sync.hasContended());
382	>	sync.release();
383	>	awaitTermination(t2);
384	>	assertTrue(sync.hasContended());
385	>	}
386	>
387	>	/**
388	>	* getQueuedThreads returns all waiting threads
389	>	*/
390	>	public void testGetQueuedThreads() {
391	>	final Mutex sync = new Mutex();
392	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
393	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
394	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
395	>	sync.acquire();
396	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
397	>	t1.start();
398	>	waitForQueuedThread(sync, t1);
399	>	assertHasExclusiveQueuedThreads(sync, t1);
400	>	assertTrue(sync.getQueuedThreads().contains(t1));
401	>	assertFalse(sync.getQueuedThreads().contains(t2));
402	>	t2.start();
403	>	waitForQueuedThread(sync, t2);
404	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
405	>	assertTrue(sync.getQueuedThreads().contains(t1));
406	>	assertTrue(sync.getQueuedThreads().contains(t2));
407	>	t1.interrupt();
408	>	awaitTermination(t1);
409	>	assertHasExclusiveQueuedThreads(sync, t2);
410	>	sync.release();
411	>	awaitTermination(t2);
412	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
413	>	}
414	>
415	>	/**
416	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
417	>	*/
418	>	public void testGetExclusiveQueuedThreads() {
419	>	final Mutex sync = new Mutex();
420	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
421	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
422	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
423	>	sync.acquire();
424	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
425	>	t1.start();
426	>	waitForQueuedThread(sync, t1);
427	>	assertHasExclusiveQueuedThreads(sync, t1);
428	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
429	>	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
430	>	t2.start();
431	>	waitForQueuedThread(sync, t2);
432	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
433	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
434	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
435	>	t1.interrupt();
436	>	awaitTermination(t1);
437	>	assertHasExclusiveQueuedThreads(sync, t2);
438	>	sync.release();
439	>	awaitTermination(t2);
440	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
441	>	}
442	>
443	>	/**
444	>	* getSharedQueuedThreads does not include exclusively waiting threads
445	>	*/
446	>	public void testGetSharedQueuedThreads_Exclusive() {
447	>	final Mutex sync = new Mutex();
448	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
449	>	sync.acquire();
450	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
451	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
452	>	waitForQueuedThread(sync, t1);
453	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
454	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
455	>	waitForQueuedThread(sync, t2);
456	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
457	>	t1.interrupt();
458	>	awaitTermination(t1);
459	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
460	>	sync.release();
461	>	awaitTermination(t2);
462	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
463	>	}
464	>
465	>	/**
466	>	* getSharedQueuedThreads returns all shared waiting threads
467	>	*/
468	>	public void testGetSharedQueuedThreads_Shared() {
469	>	final BooleanLatch l = new BooleanLatch();
470	>	assertHasSharedQueuedThreads(l, NO_THREADS);
471	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
472	>	public void realRun() throws InterruptedException {
473	>	l.acquireSharedInterruptibly(0);
474	>	}});
475	>	waitForQueuedThread(l, t1);
476	>	assertHasSharedQueuedThreads(l, t1);
477	>	Thread t2 = newStartedThread(new CheckedRunnable() {
478	>	public void realRun() throws InterruptedException {
479	>	l.acquireSharedInterruptibly(0);
480	>	}});
481	>	waitForQueuedThread(l, t2);
482	>	assertHasSharedQueuedThreads(l, t1, t2);
483	>	t1.interrupt();
484	>	awaitTermination(t1);
485	>	assertHasSharedQueuedThreads(l, t2);
486	>	assertTrue(l.releaseShared(0));
487	>	awaitTermination(t2);
488	>	assertHasSharedQueuedThreads(l, NO_THREADS);
489	>	}
490	>
491	>	/**
492	>	* tryAcquireNanos is interruptible
493	>	*/
494	>	public void testTryAcquireNanos_Interruptible() {
495	>	final Mutex sync = new Mutex();
496	>	sync.acquire();
497	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
498	>	public void realRun() throws InterruptedException {
499	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
500	>	}});
501	>
502	>	waitForQueuedThread(sync, t);
503	>	t.interrupt();
504	>	awaitTermination(t);
505	>	}
506	>
507	>	/**
508	>	* tryAcquire on exclusively held sync fails
509	>	*/
510	>	public void testTryAcquireWhenSynced() {
511	>	final Mutex sync = new Mutex();
512	>	sync.acquire();
513	>	Thread t = newStartedThread(new CheckedRunnable() {
514	>	public void realRun() {
515	>	assertFalse(sync.tryAcquire());
516	>	}});
517	>
518	>	awaitTermination(t);
519	>	sync.release();
520	>	}
521	>
522	>	/**
523	>	* tryAcquireNanos on an exclusively held sync times out
524	>	*/
525	>	public void testAcquireNanos_Timeout() {
526	>	final Mutex sync = new Mutex();
527	>	sync.acquire();
528	>	Thread t = newStartedThread(new CheckedRunnable() {
529	>	public void realRun() throws InterruptedException {
530	>	long startTime = System.nanoTime();
531	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
532	>	assertFalse(sync.tryAcquireNanos(nanos));
533	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
534	>	}});
535	>
536	>	awaitTermination(t);
537	>	sync.release();
538	>	}
539	>
540	>	/**
541	>	* getState is true when acquired and false when not
542	>	*/
543	>	public void testGetState() {
544	>	final Mutex sync = new Mutex();
545	>	sync.acquire();
546	>	assertTrue(sync.isHeldExclusively());
547	>	sync.release();
548	>	assertFalse(sync.isHeldExclusively());
549	>
550	>	final BooleanLatch acquired = new BooleanLatch();
551	>	final BooleanLatch done = new BooleanLatch();
552	>	Thread t = newStartedThread(new CheckedRunnable() {
553	>	public void realRun() throws InterruptedException {
554	>	sync.acquire();
555	>	assertTrue(acquired.releaseShared(0));
556	>	done.acquireShared(0);
557	>	sync.release();
558	>	}});
559	>
560	>	acquired.acquireShared(0);
561	>	assertTrue(sync.isHeldExclusively());
562	>	assertTrue(done.releaseShared(0));
563	>	awaitTermination(t);
564	>	assertFalse(sync.isHeldExclusively());
565	>	}
566	>
567	>	/**
568	>	* acquireInterruptibly succeeds when released, else is interruptible
569	>	*/
570	>	public void testAcquireInterruptibly() throws InterruptedException {
571	>	final Mutex sync = new Mutex();
572	>	final BooleanLatch threadStarted = new BooleanLatch();
573	>	sync.acquireInterruptibly();
574	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
575	>	public void realRun() throws InterruptedException {
576	>	assertTrue(threadStarted.releaseShared(0));
577	>	sync.acquireInterruptibly();
578	>	}});
579	>
580	>	threadStarted.acquireShared(0);
581	>	waitForQueuedThread(sync, t);
582	>	t.interrupt();
583	>	awaitTermination(t);
584	>	assertTrue(sync.isHeldExclusively());
585	>	}
586	>
587	>	/**
588	>	* owns is true for a condition created by sync else false
589	>	*/
590	>	public void testOwns() {
591	>	final Mutex sync = new Mutex();
592	>	final ConditionObject c = sync.newCondition();
593	>	final Mutex sync2 = new Mutex();
594	>	assertTrue(sync.owns(c));
595	>	assertFalse(sync2.owns(c));
596	>	}
597	>
598	>	/**
599	>	* Calling await without holding sync throws IllegalMonitorStateException
600	>	*/
601	>	public void testAwait_IMSE() {
602	>	final Mutex sync = new Mutex();
603	>	final ConditionObject c = sync.newCondition();
604	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
605	>	long startTime = System.nanoTime();
606	>	try {
607	>	await(c, awaitMethod);
608	>	shouldThrow();
609	>	} catch (IllegalMonitorStateException success) {
610	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
611	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
612		}
613		}
614
615		/**
616	<	* Calling signal without holding lock throws IllegalMonitorStateException
616	>	* Calling signal without holding sync throws IllegalMonitorStateException
617		*/
618	<	public void testSignal_IllegalMonitor() {
619	<	final Mutex lock = new Mutex();
620	<	final Condition c = lock.newCondition();
618	>	public void testSignal_IMSE() {
619	>	final Mutex sync = new Mutex();
620	>	final ConditionObject c = sync.newCondition();
621		try {
622		c.signal();
623		shouldThrow();
624	<	}
625	<	catch (IllegalMonitorStateException success) {
387	<	}
388	<	catch (Exception ex) {
389	<	unexpectedException();
390	<	}
624	>	} catch (IllegalMonitorStateException success) {}
625	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
626		}
627
628		/**
629	<	* awaitNanos without a signal times out
629	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
630		*/
631	<	public void testAwaitNanos_Timeout() {
632	<	final Mutex lock = new Mutex();
633	<	final Condition c = lock.newCondition();
631	>	public void testSignalAll_IMSE() {
632	>	final Mutex sync = new Mutex();
633	>	final ConditionObject c = sync.newCondition();
634		try {
635	<	lock.lock();
636	<	long t = c.awaitNanos(100);
637	<	assertTrue(t <= 0);
638	<	lock.unlock();
639	<	}
640	<	catch (Exception ex) {
641	<	unexpectedException();
642	<	}
635	>	c.signalAll();
636	>	shouldThrow();
637	>	} catch (IllegalMonitorStateException success) {}
638	>	}
639	>
640	>	/**
641	>	* await/awaitNanos/awaitUntil without a signal times out
642	>	*/
643	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
644	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
645	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
646	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
647	>	final Mutex sync = new Mutex();
648	>	final ConditionObject c = sync.newCondition();
649	>	sync.acquire();
650	>	assertAwaitTimesOut(c, awaitMethod);
651	>	sync.release();
652	>	}
653	>
654	>	/**
655	>	* await/awaitNanos/awaitUntil returns when signalled
656	>	*/
657	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
658	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
659	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
660	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
661	>	public void testSignal(final AwaitMethod awaitMethod) {
662	>	final Mutex sync = new Mutex();
663	>	final ConditionObject c = sync.newCondition();
664	>	final BooleanLatch acquired = new BooleanLatch();
665	>	Thread t = newStartedThread(new CheckedRunnable() {
666	>	public void realRun() throws InterruptedException {
667	>	sync.acquire();
668	>	assertTrue(acquired.releaseShared(0));
669	>	await(c, awaitMethod);
670	>	sync.release();
671	>	}});
672	>
673	>	acquired.acquireShared(0);
674	>	sync.acquire();
675	>	assertHasWaitersLocked(sync, c, t);
676	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
677	>	c.signal();
678	>	assertHasWaitersLocked(sync, c, NO_THREADS);
679	>	assertHasExclusiveQueuedThreads(sync, t);
680	>	sync.release();
681	>	awaitTermination(t);
682		}
683
684		/**
685	<	*  timed await without a signal times out
685	>	* hasWaiters(null) throws NullPointerException
686		*/
687	<	public void testAwait_Timeout() {
688	<	final Mutex lock = new Mutex();
415	<	final Condition c = lock.newCondition();
687	>	public void testHasWaitersNPE() {
688	>	final Mutex sync = new Mutex();
689		try {
690	<	lock.lock();
691	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
692	<	lock.unlock();
420	<	}
421	<	catch (Exception ex) {
422	<	unexpectedException();
423	<	}
690	>	sync.hasWaiters(null);
691	>	shouldThrow();
692	>	} catch (NullPointerException success) {}
693		}
694
695		/**
696	<	* awaitUntil without a signal times out
696	>	* getWaitQueueLength(null) throws NullPointerException
697		*/
698	<	public void testAwaitUntil_Timeout() {
699	<	final Mutex lock = new Mutex();
431	<	final Condition c = lock.newCondition();
698	>	public void testGetWaitQueueLengthNPE() {
699	>	final Mutex sync = new Mutex();
700		try {
701	<	lock.lock();
702	<	java.util.Date d = new java.util.Date();
703	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
436	<	lock.unlock();
437	<	}
438	<	catch (Exception ex) {
439	<	unexpectedException();
440	<	}
701	>	sync.getWaitQueueLength(null);
702	>	shouldThrow();
703	>	} catch (NullPointerException success) {}
704		}
705
706		/**
707	<	* await returns when signalled
707	>	* getWaitingThreads(null) throws NullPointerException
708		*/
709	<	public void testAwait() {
710	<	final Mutex lock = new Mutex();
711	<	final Condition c = lock.newCondition();
712	<	Thread t = new Thread(new Runnable() {
713	<	public void run() {
714	<	try {
715	<	lock.lock();
453	<	c.await();
454	<	lock.unlock();
455	<	}
456	<	catch(InterruptedException e) {
457	<	threadUnexpectedException();
458	<	}
459	<	}
460	<	});
709	>	public void testGetWaitingThreadsNPE() {
710	>	final Mutex sync = new Mutex();
711	>	try {
712	>	sync.getWaitingThreads(null);
713	>	shouldThrow();
714	>	} catch (NullPointerException success) {}
715	>	}
716
717	+	/**
718	+	* hasWaiters throws IllegalArgumentException if not owned
719	+	*/
720	+	public void testHasWaitersIAE() {
721	+	final Mutex sync = new Mutex();
722	+	final ConditionObject c = sync.newCondition();
723	+	final Mutex sync2 = new Mutex();
724		try {
725	<	t.start();
726	<	Thread.sleep(SHORT_DELAY_MS);
727	<	lock.lock();
728	<	c.signal();
729	<	lock.unlock();
730	<	t.join(SHORT_DELAY_MS);
731	<	assertFalse(t.isAlive());
732	<	}
733	<	catch (Exception ex) {
734	<	unexpectedException();
735	<	}
725	>	sync2.hasWaiters(c);
726	>	shouldThrow();
727	>	} catch (IllegalArgumentException success) {}
728	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
729	>	}
730	>
731	>	/**
732	>	* hasWaiters throws IllegalMonitorStateException if not synced
733	>	*/
734	>	public void testHasWaitersIMSE() {
735	>	final Mutex sync = new Mutex();
736	>	final ConditionObject c = sync.newCondition();
737	>	try {
738	>	sync.hasWaiters(c);
739	>	shouldThrow();
740	>	} catch (IllegalMonitorStateException success) {}
741	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
742	>	}
743	>
744	>	/**
745	>	* getWaitQueueLength throws IllegalArgumentException if not owned
746	>	*/
747	>	public void testGetWaitQueueLengthIAE() {
748	>	final Mutex sync = new Mutex();
749	>	final ConditionObject c = sync.newCondition();
750	>	final Mutex sync2 = new Mutex();
751	>	try {
752	>	sync2.getWaitQueueLength(c);
753	>	shouldThrow();
754	>	} catch (IllegalArgumentException success) {}
755	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
756	>	}
757	>
758	>	/**
759	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
760	>	*/
761	>	public void testGetWaitQueueLengthIMSE() {
762	>	final Mutex sync = new Mutex();
763	>	final ConditionObject c = sync.newCondition();
764	>	try {
765	>	sync.getWaitQueueLength(c);
766	>	shouldThrow();
767	>	} catch (IllegalMonitorStateException success) {}
768	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
769	>	}
770	>
771	>	/**
772	>	* getWaitingThreads throws IllegalArgumentException if not owned
773	>	*/
774	>	public void testGetWaitingThreadsIAE() {
775	>	final Mutex sync = new Mutex();
776	>	final ConditionObject c = sync.newCondition();
777	>	final Mutex sync2 = new Mutex();
778	>	try {
779	>	sync2.getWaitingThreads(c);
780	>	shouldThrow();
781	>	} catch (IllegalArgumentException success) {}
782	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
783	>	}
784	>
785	>	/**
786	>	* getWaitingThreads throws IllegalMonitorStateException if not synced
787	>	*/
788	>	public void testGetWaitingThreadsIMSE() {
789	>	final Mutex sync = new Mutex();
790	>	final ConditionObject c = sync.newCondition();
791	>	try {
792	>	sync.getWaitingThreads(c);
793	>	shouldThrow();
794	>	} catch (IllegalMonitorStateException success) {}
795	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
796		}
797	<
797	>
798	>	/**
799	>	* hasWaiters returns true when a thread is waiting, else false
800	>	*/
801	>	public void testHasWaiters() {
802	>	final Mutex sync = new Mutex();
803	>	final ConditionObject c = sync.newCondition();
804	>	final BooleanLatch acquired = new BooleanLatch();
805	>	Thread t = newStartedThread(new CheckedRunnable() {
806	>	public void realRun() throws InterruptedException {
807	>	sync.acquire();
808	>	assertHasWaitersLocked(sync, c, NO_THREADS);
809	>	assertFalse(sync.hasWaiters(c));
810	>	assertTrue(acquired.releaseShared(0));
811	>	c.await();
812	>	sync.release();
813	>	}});
814	>
815	>	acquired.acquireShared(0);
816	>	sync.acquire();
817	>	assertHasWaitersLocked(sync, c, t);
818	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
819	>	assertTrue(sync.hasWaiters(c));
820	>	c.signal();
821	>	assertHasWaitersLocked(sync, c, NO_THREADS);
822	>	assertHasExclusiveQueuedThreads(sync, t);
823	>	assertFalse(sync.hasWaiters(c));
824	>	sync.release();
825	>
826	>	awaitTermination(t);
827	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
828	>	}
829	>
830	>	/**
831	>	* getWaitQueueLength returns number of waiting threads
832	>	*/
833	>	public void testGetWaitQueueLength() {
834	>	final Mutex sync = new Mutex();
835	>	final ConditionObject c = sync.newCondition();
836	>	final BooleanLatch acquired1 = new BooleanLatch();
837	>	final BooleanLatch acquired2 = new BooleanLatch();
838	>	final Thread t1 = newStartedThread(new CheckedRunnable() {
839	>	public void realRun() throws InterruptedException {
840	>	sync.acquire();
841	>	assertHasWaitersLocked(sync, c, NO_THREADS);
842	>	assertEquals(0, sync.getWaitQueueLength(c));
843	>	assertTrue(acquired1.releaseShared(0));
844	>	c.await();
845	>	sync.release();
846	>	}});
847	>	acquired1.acquireShared(0);
848	>	sync.acquire();
849	>	assertHasWaitersLocked(sync, c, t1);
850	>	assertEquals(1, sync.getWaitQueueLength(c));
851	>	sync.release();
852	>
853	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
854	>	public void realRun() throws InterruptedException {
855	>	sync.acquire();
856	>	assertHasWaitersLocked(sync, c, t1);
857	>	assertEquals(1, sync.getWaitQueueLength(c));
858	>	assertTrue(acquired2.releaseShared(0));
859	>	c.await();
860	>	sync.release();
861	>	}});
862	>	acquired2.acquireShared(0);
863	>	sync.acquire();
864	>	assertHasWaitersLocked(sync, c, t1, t2);
865	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
866	>	assertEquals(2, sync.getWaitQueueLength(c));
867	>	c.signalAll();
868	>	assertHasWaitersLocked(sync, c, NO_THREADS);
869	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
870	>	assertEquals(0, sync.getWaitQueueLength(c));
871	>	sync.release();
872	>
873	>	awaitTermination(t1);
874	>	awaitTermination(t2);
875	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
876	>	}
877	>
878	>	/**
879	>	* getWaitingThreads returns only and all waiting threads
880	>	*/
881	>	public void testGetWaitingThreads() {
882	>	final Mutex sync = new Mutex();
883	>	final ConditionObject c = sync.newCondition();
884	>	final BooleanLatch acquired1 = new BooleanLatch();
885	>	final BooleanLatch acquired2 = new BooleanLatch();
886	>	final Thread t1 = new Thread(new CheckedRunnable() {
887	>	public void realRun() throws InterruptedException {
888	>	sync.acquire();
889	>	assertHasWaitersLocked(sync, c, NO_THREADS);
890	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
891	>	assertTrue(acquired1.releaseShared(0));
892	>	c.await();
893	>	sync.release();
894	>	}});
895	>
896	>	final Thread t2 = new Thread(new CheckedRunnable() {
897	>	public void realRun() throws InterruptedException {
898	>	sync.acquire();
899	>	assertHasWaitersLocked(sync, c, t1);
900	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
901	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
902	>	assertEquals(1, sync.getWaitingThreads(c).size());
903	>	assertTrue(acquired2.releaseShared(0));
904	>	c.await();
905	>	sync.release();
906	>	}});
907	>
908	>	sync.acquire();
909	>	assertHasWaitersLocked(sync, c, NO_THREADS);
910	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
911	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
912	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
913	>	assertEquals(0, sync.getWaitingThreads(c).size());
914	>	sync.release();
915	>
916	>	t1.start();
917	>	acquired1.acquireShared(0);
918	>	sync.acquire();
919	>	assertHasWaitersLocked(sync, c, t1);
920	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
921	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
922	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
923	>	assertEquals(1, sync.getWaitingThreads(c).size());
924	>	sync.release();
925	>
926	>	t2.start();
927	>	acquired2.acquireShared(0);
928	>	sync.acquire();
929	>	assertHasWaitersLocked(sync, c, t1, t2);
930	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
931	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
932	>	assertTrue(sync.getWaitingThreads(c).contains(t2));
933	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
934	>	assertEquals(2, sync.getWaitingThreads(c).size());
935	>	c.signalAll();
936	>	assertHasWaitersLocked(sync, c, NO_THREADS);
937	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
938	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
939	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
940	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
941	>	assertEquals(0, sync.getWaitingThreads(c).size());
942	>	sync.release();
943	>
944	>	awaitTermination(t1);
945	>	awaitTermination(t2);
946	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
947	>	}
948	>
949	>	/**
950	>	* awaitUninterruptibly is uninterruptible
951	>	*/
952	>	public void testAwaitUninterruptibly() {
953	>	final Mutex sync = new Mutex();
954	>	final ConditionObject c = sync.newCondition();
955	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
956	>	Thread t = newStartedThread(new CheckedRunnable() {
957	>	public void realRun() {
958	>	sync.acquire();
959	>	assertTrue(pleaseInterrupt.releaseShared(0));
960	>	c.awaitUninterruptibly();
961	>	assertTrue(Thread.interrupted());
962	>	assertHasWaitersLocked(sync, c, NO_THREADS);
963	>	sync.release();
964	>	}});
965	>
966	>	pleaseInterrupt.acquireShared(0);
967	>	sync.acquire();
968	>	assertHasWaitersLocked(sync, c, t);
969	>	sync.release();
970	>	t.interrupt();
971	>	assertHasWaitersUnlocked(sync, c, t);
972	>	assertThreadStaysAlive(t);
973	>	sync.acquire();
974	>	assertHasWaitersLocked(sync, c, t);
975	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
976	>	c.signal();
977	>	assertHasWaitersLocked(sync, c, NO_THREADS);
978	>	assertHasExclusiveQueuedThreads(sync, t);
979	>	sync.release();
980	>	awaitTermination(t);
981	>	}
982	>
983	>	/**
984	>	* await/awaitNanos/awaitUntil is interruptible
985	>	*/
986	>	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
987	>	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
988	>	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
989	>	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
990	>	public void testInterruptible(final AwaitMethod awaitMethod) {
991	>	final Mutex sync = new Mutex();
992	>	final ConditionObject c = sync.newCondition();
993	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
994	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
995	>	public void realRun() throws InterruptedException {
996	>	sync.acquire();
997	>	assertTrue(pleaseInterrupt.releaseShared(0));
998	>	await(c, awaitMethod);
999	>	}});
1000	>
1001	>	pleaseInterrupt.acquireShared(0);
1002	>	t.interrupt();
1003	>	awaitTermination(t);
1004	>	}
1005	>
1006	>	/**
1007	>	* signalAll wakes up all threads
1008	>	*/
1009	>	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1010	>	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1011	>	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1012	>	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1013	>	public void testSignalAll(final AwaitMethod awaitMethod) {
1014	>	final Mutex sync = new Mutex();
1015	>	final ConditionObject c = sync.newCondition();
1016	>	final BooleanLatch acquired1 = new BooleanLatch();
1017	>	final BooleanLatch acquired2 = new BooleanLatch();
1018	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1019	>	public void realRun() throws InterruptedException {
1020	>	sync.acquire();
1021	>	acquired1.releaseShared(0);
1022	>	await(c, awaitMethod);
1023	>	sync.release();
1024	>	}});
1025	>
1026	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1027	>	public void realRun() throws InterruptedException {
1028	>	sync.acquire();
1029	>	acquired2.releaseShared(0);
1030	>	await(c, awaitMethod);
1031	>	sync.release();
1032	>	}});
1033	>
1034	>	acquired1.acquireShared(0);
1035	>	acquired2.acquireShared(0);
1036	>	sync.acquire();
1037	>	assertHasWaitersLocked(sync, c, t1, t2);
1038	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1039	>	c.signalAll();
1040	>	assertHasWaitersLocked(sync, c, NO_THREADS);
1041	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
1042	>	sync.release();
1043	>	awaitTermination(t1);
1044	>	awaitTermination(t2);
1045	>	}
1046	>
1047	>	/**
1048	>	* toString indicates current state
1049	>	*/
1050	>	public void testToString() {
1051	>	Mutex sync = new Mutex();
1052	>	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1053	>	sync.acquire();
1054	>	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1055	>	}
1056	>
1057	>	/**
1058	>	* A serialized AQS deserializes with current state, but no queued threads
1059	>	*/
1060	>	public void testSerialization() {
1061	>	Mutex sync = new Mutex();
1062	>	assertFalse(serialClone(sync).isHeldExclusively());
1063	>	sync.acquire();
1064	>	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1065	>	waitForQueuedThread(sync, t);
1066	>	assertTrue(sync.isHeldExclusively());
1067	>
1068	>	Mutex clone = serialClone(sync);
1069	>	assertTrue(clone.isHeldExclusively());
1070	>	assertHasExclusiveQueuedThreads(sync, t);
1071	>	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1072	>	t.interrupt();
1073	>	awaitTermination(t);
1074	>	sync.release();
1075	>	assertFalse(sync.isHeldExclusively());
1076	>	assertTrue(clone.isHeldExclusively());
1077	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1078	>	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1079	>	}
1080	>
1081	>	/**
1082	>	* tryReleaseShared setting state changes getState
1083	>	*/
1084	>	public void testGetStateWithReleaseShared() {
1085	>	final BooleanLatch l = new BooleanLatch();
1086	>	assertFalse(l.isSignalled());
1087	>	assertTrue(l.releaseShared(0));
1088	>	assertTrue(l.isSignalled());
1089	>	}
1090	>
1091	>	/**
1092	>	* releaseShared has no effect when already signalled
1093	>	*/
1094	>	public void testReleaseShared() {
1095	>	final BooleanLatch l = new BooleanLatch();
1096	>	assertFalse(l.isSignalled());
1097	>	assertTrue(l.releaseShared(0));
1098	>	assertTrue(l.isSignalled());
1099	>	assertTrue(l.releaseShared(0));
1100	>	assertTrue(l.isSignalled());
1101	>	}
1102	>
1103	>	/**
1104	>	* acquireSharedInterruptibly returns after release, but not before
1105	>	*/
1106	>	public void testAcquireSharedInterruptibly() {
1107	>	final BooleanLatch l = new BooleanLatch();
1108	>
1109	>	Thread t = newStartedThread(new CheckedRunnable() {
1110	>	public void realRun() throws InterruptedException {
1111	>	assertFalse(l.isSignalled());
1112	>	l.acquireSharedInterruptibly(0);
1113	>	assertTrue(l.isSignalled());
1114	>	l.acquireSharedInterruptibly(0);
1115	>	assertTrue(l.isSignalled());
1116	>	}});
1117	>
1118	>	waitForQueuedThread(l, t);
1119	>	assertFalse(l.isSignalled());
1120	>	assertThreadStaysAlive(t);
1121	>	assertHasSharedQueuedThreads(l, t);
1122	>	assertTrue(l.releaseShared(0));
1123	>	assertTrue(l.isSignalled());
1124	>	awaitTermination(t);
1125	>	}
1126	>
1127	>	/**
1128	>	* tryAcquireSharedNanos returns after release, but not before
1129	>	*/
1130	>	public void testTryAcquireSharedNanos() {
1131	>	final BooleanLatch l = new BooleanLatch();
1132	>
1133	>	Thread t = newStartedThread(new CheckedRunnable() {
1134	>	public void realRun() throws InterruptedException {
1135	>	assertFalse(l.isSignalled());
1136	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1137	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1138	>	assertTrue(l.isSignalled());
1139	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1140	>	assertTrue(l.isSignalled());
1141	>	}});
1142	>
1143	>	waitForQueuedThread(l, t);
1144	>	assertFalse(l.isSignalled());
1145	>	assertThreadStaysAlive(t);
1146	>	assertTrue(l.releaseShared(0));
1147	>	assertTrue(l.isSignalled());
1148	>	awaitTermination(t);
1149	>	}
1150	>
1151	>	/**
1152	>	* acquireSharedInterruptibly is interruptible
1153	>	*/
1154	>	public void testAcquireSharedInterruptibly_Interruptible() {
1155	>	final BooleanLatch l = new BooleanLatch();
1156	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1157	>	public void realRun() throws InterruptedException {
1158	>	assertFalse(l.isSignalled());
1159	>	l.acquireSharedInterruptibly(0);
1160	>	}});
1161	>
1162	>	waitForQueuedThread(l, t);
1163	>	assertFalse(l.isSignalled());
1164	>	t.interrupt();
1165	>	awaitTermination(t);
1166	>	assertFalse(l.isSignalled());
1167	>	}
1168	>
1169	>	/**
1170	>	* tryAcquireSharedNanos is interruptible
1171	>	*/
1172	>	public void testTryAcquireSharedNanos_Interruptible() {
1173	>	final BooleanLatch l = new BooleanLatch();
1174	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1175	>	public void realRun() throws InterruptedException {
1176	>	assertFalse(l.isSignalled());
1177	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1178	>	l.tryAcquireSharedNanos(0, nanos);
1179	>	}});
1180	>
1181	>	waitForQueuedThread(l, t);
1182	>	assertFalse(l.isSignalled());
1183	>	t.interrupt();
1184	>	awaitTermination(t);
1185	>	assertFalse(l.isSignalled());
1186	>	}
1187	>
1188	>	/**
1189	>	* tryAcquireSharedNanos times out if not released before timeout
1190	>	*/
1191	>	public void testTryAcquireSharedNanos_Timeout() {
1192	>	final BooleanLatch l = new BooleanLatch();
1193	>	Thread t = newStartedThread(new CheckedRunnable() {
1194	>	public void realRun() throws InterruptedException {
1195	>	assertFalse(l.isSignalled());
1196	>	long startTime = System.nanoTime();
1197	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
1198	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1199	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1200	>	assertFalse(l.isSignalled());
1201	>	}});
1202	>
1203	>	waitForQueuedThread(l, t);
1204	>	assertFalse(l.isSignalled());
1205	>	awaitTermination(t);
1206	>	assertFalse(l.isSignalled());
1207	>	}
1208	>
1209		}

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