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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.8 by dl, Sun Jan 4 00:57:21 2004 UTC vs.
Revision 1.45 by jsr166, Tue Dec 2 07:23:13 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	–
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 static java.util.concurrent.TimeUnit.NANOSECONDS;
13	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer;
14	>	import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject;
15
16		public class AbstractQueuedSynchronizerTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
21		return new TestSuite(AbstractQueuedSynchronizerTest.class);
22		}
23
24		/**
25	<	* A simple mutex class, from the AbstractQueuedSynchronizer
26	<	* javadoc.  All tests exercise this as a sample user extension.
27	<	* Other methods/features of AbstractQueuedSynchronizerTest are
28	<	* tested implicitly in ReentrantLock, ReentrantReadWriteLock, and
29	<	* Semaphore test classes
30	<	*/
31	<	static class Mutex implements Lock, java.io.Serializable {
32	<	private static class Sync extends AbstractQueuedSynchronizer {
33	<	boolean isLocked() { return getState() == 1; }
34	<
35	<	public boolean tryAcquireExclusive(boolean isQueued, 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	<	}
25	>	* A simple mutex class, adapted from the class javadoc.  Exclusive
26	>	* acquire tests exercise this as a sample user extension.  Other
27	>	* methods/features of AbstractQueuedSynchronizer are tested via
28	>	* other test classes, including those for ReentrantLock,
29	>	* ReentrantReadWriteLock, and Semaphore.
30	>	*/
31	>	static class Mutex extends AbstractQueuedSynchronizer {
32	>	/** An eccentric value for locked synchronizer state. */
33	>	static final int LOCKED = (1 << 31) | (1 << 15);
34	>
35	>	static final int UNLOCKED = 0;
36	>
37	>	@Override public boolean isHeldExclusively() {
38	>	int state = getState();
39	>	assertTrue(state == UNLOCKED || state == LOCKED);
40	>	return state == LOCKED;
41	>	}
42	>
43	>	@Override public boolean tryAcquire(int acquires) {
44	>	assertEquals(LOCKED, acquires);
45	>	return compareAndSetState(UNLOCKED, LOCKED);
46	>	}
47	>
48	>	@Override public boolean tryRelease(int releases) {
49	>	if (getState() != LOCKED) throw new IllegalMonitorStateException();
50	>	assertEquals(LOCKED, releases);
51	>	setState(UNLOCKED);
52	>	return true;
53	>	}
54	>
55	>	public boolean tryAcquireNanos(long nanos) throws InterruptedException {
56	>	return tryAcquireNanos(LOCKED, nanos);
57	>	}
58	>
59	>	public boolean tryAcquire() {
60	>	return tryAcquire(LOCKED);
61	>	}
62
63	+	public boolean tryRelease() {
64	+	return tryRelease(LOCKED);
65		}
66	<
67	<	private final Sync sync = new Sync();
68	<	public boolean tryLock() {
60	<	return sync.tryAcquireExclusive(false, 1);
66	>
67	>	public void acquire() {
68	>	acquire(LOCKED);
69		}
70	<	public void lock() {
71	<	sync.acquireExclusiveUninterruptibly(1);
70	>
71	>	public void acquireInterruptibly() throws InterruptedException {
72	>	acquireInterruptibly(LOCKED);
73		}
74	<	public void lockInterruptibly() throws InterruptedException {
75	<	sync.acquireExclusiveInterruptibly(1);
74	>
75	>	public void release() {
76	>	release(LOCKED);
77		}
78	<	public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException {
79	<	return sync.acquireExclusiveTimed(1, unit.toNanos(timeout));
78	>
79	>	public ConditionObject newCondition() {
80	>	return new ConditionObject();
81		}
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(); }
82		}
83
84		/**
85	<	* A runnable calling lockInterruptibly
85	>	* A simple latch class, to test shared mode.
86		*/
87	<	class InterruptibleLockRunnable implements Runnable {
88	<	final Mutex lock;
89	<	InterruptibleLockRunnable(Mutex l) { lock = l; }
90	<	public void run() {
91	<	try {
92	<	lock.lockInterruptibly();
93	<	} catch(InterruptedException success){}
87	>	static class BooleanLatch extends AbstractQueuedSynchronizer {
88	>	public boolean isSignalled() { return getState() != 0; }
89	>
90	>	public int tryAcquireShared(int ignore) {
91	>	return isSignalled() ? 1 : -1;
92	>	}
93	>
94	>	public boolean tryReleaseShared(int ignore) {
95	>	setState(1);
96	>	return true;
97		}
98		}
99
100	+	/**
101	+	* A runnable calling acquireInterruptibly that does not expect to
102	+	* be interrupted.
103	+	*/
104	+	class InterruptibleSyncRunnable extends CheckedRunnable {
105	+	final Mutex sync;
106	+	InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; }
107	+	public void realRun() throws InterruptedException {
108	+	sync.acquireInterruptibly();
109	+	}
110	+	}
111
112		/**
113	<	* A runnable calling lockInterruptibly that expects to be
114	<	* interrupted
113	>	* A runnable calling acquireInterruptibly that expects to be
114	>	* interrupted.
115		*/
116	<	class InterruptedLockRunnable implements Runnable {
117	<	final Mutex lock;
118	<	InterruptedLockRunnable(Mutex l) { lock = l; }
119	<	public void run() {
120	<	try {
101	<	lock.lockInterruptibly();
102	<	threadShouldThrow();
103	<	} catch(InterruptedException success){}
116	>	class InterruptedSyncRunnable extends CheckedInterruptedRunnable {
117	>	final Mutex sync;
118	>	InterruptedSyncRunnable(Mutex sync) { this.sync = sync; }
119	>	public void realRun() throws InterruptedException {
120	>	sync.acquireInterruptibly();
121		}
122		}
123	<
123	>
124	>	/** A constant to clarify calls to checking methods below. */
125	>	static final Thread[] NO_THREADS = new Thread[0];
126	>
127		/**
128	<	* locking an unlocked lock succeeds
128	>	* Spin-waits until sync.isQueued(t) becomes true.
129		*/
130	<	public void testLock() {
131	<	Mutex rl = new Mutex();
132	<	rl.lock();
133	<	assertTrue(rl.isLocked());
134	<	rl.unlock();
130	>	void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) {
131	>	long startTime = System.nanoTime();
132	>	while (!sync.isQueued(t)) {
133	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
134	>	throw new AssertionFailedError("timed out");
135	>	Thread.yield();
136	>	}
137	>	assertTrue(t.isAlive());
138		}
139
140		/**
141	<	* tryLock on an unlocked lock succeeds
141	>	* Checks that sync has exactly the given queued threads.
142		*/
143	<	public void testTryLock() {
144	<	Mutex rl = new Mutex();
145	<	assertTrue(rl.tryLock());
146	<	assertTrue(rl.isLocked());
147	<	rl.unlock();
143	>	void assertHasQueuedThreads(AbstractQueuedSynchronizer sync,
144	>	Thread... expected) {
145	>	Collection<Thread> actual = sync.getQueuedThreads();
146	>	assertEquals(expected.length > 0, sync.hasQueuedThreads());
147	>	assertEquals(expected.length, sync.getQueueLength());
148	>	assertEquals(expected.length, actual.size());
149	>	assertEquals(expected.length == 0, actual.isEmpty());
150	>	assertEquals(new HashSet<Thread>(actual),
151	>	new HashSet<Thread>(Arrays.asList(expected)));
152		}
153
154		/**
155	<	* hasQueuedThreads reports whether there are waiting threads
155	>	* Checks that sync has exactly the given (exclusive) queued threads.
156		*/
157	<	public void testhasQueuedThreads() {
158	<	final Mutex lock = new Mutex();
159	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
160	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
161	<	try {
162	<	assertFalse(lock.hasQueuedThreads());
163	<	lock.lock();
137	<	t1.start();
138	<	Thread.sleep(SHORT_DELAY_MS);
139	<	assertTrue(lock.hasQueuedThreads());
140	<	t2.start();
141	<	Thread.sleep(SHORT_DELAY_MS);
142	<	assertTrue(lock.hasQueuedThreads());
143	<	t1.interrupt();
144	<	Thread.sleep(SHORT_DELAY_MS);
145	<	assertTrue(lock.hasQueuedThreads());
146	<	lock.unlock();
147	<	Thread.sleep(SHORT_DELAY_MS);
148	<	assertFalse(lock.hasQueuedThreads());
149	<	t1.join();
150	<	t2.join();
151	<	} catch(Exception e){
152	<	unexpectedException();
153	<	}
154	<	}
155	<
156	<
157	<	/**
158	<	* hasContended reports whether there has been contention
159	<	*/
160	<	public void testhasContended() {
161	<	final Mutex lock = new Mutex();
162	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
163	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
164	<	try {
165	<	assertFalse(lock.hasContended());
166	<	lock.lock();
167	<	t1.start();
168	<	Thread.sleep(SHORT_DELAY_MS);
169	<	assertTrue(lock.hasContended());
170	<	t2.start();
171	<	Thread.sleep(SHORT_DELAY_MS);
172	<	assertTrue(lock.hasContended());
173	<	t1.interrupt();
174	<	Thread.sleep(SHORT_DELAY_MS);
175	<	assertTrue(lock.hasContended());
176	<	lock.unlock();
177	<	Thread.sleep(SHORT_DELAY_MS);
178	<	assertTrue(lock.hasContended());
179	<	t1.join();
180	<	t2.join();
181	<	} catch(Exception e){
182	<	unexpectedException();
183	<	}
184	<	}
185	<
186	<	/**
187	<	* timed tryLock is interruptible.
188	<	*/
189	<	public void testInterruptedException2() {
190	<	final Mutex lock = new Mutex();
191	<	lock.lock();
192	<	Thread t = new Thread(new Runnable() {
193	<	public void run() {
194	<	try {
195	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
196	<	threadShouldThrow();
197	<	} catch(InterruptedException success){}
198	<	}
199	<	});
200	<	try {
201	<	t.start();
202	<	t.interrupt();
203	<	} catch(Exception e){
204	<	unexpectedException();
205	<	}
157	>	void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync,
158	>	Thread... expected) {
159	>	assertHasQueuedThreads(sync, expected);
160	>	assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()),
161	>	new HashSet<Thread>(sync.getQueuedThreads()));
162	>	assertEquals(0, sync.getSharedQueuedThreads().size());
163	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
164		}
165
166	+	/**
167	+	* Checks that sync has exactly the given (shared) queued threads.
168	+	*/
169	+	void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync,
170	+	Thread... expected) {
171	+	assertHasQueuedThreads(sync, expected);
172	+	assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()),
173	+	new HashSet<Thread>(sync.getQueuedThreads()));
174	+	assertEquals(0, sync.getExclusiveQueuedThreads().size());
175	+	assertTrue(sync.getExclusiveQueuedThreads().isEmpty());
176	+	}
177
178		/**
179	<	* TryLock on a locked lock fails
180	<	*/
181	<	public void testTryLockWhenLocked() {
182	<	final Mutex lock = new Mutex();
183	<	lock.lock();
184	<	Thread t = new Thread(new Runnable() {
185	<	public void run() {
186	<	threadAssertFalse(lock.tryLock());
187	<	}
188	<	});
189	<	try {
190	<	t.start();
191	<	t.join();
192	<	lock.unlock();
193	<	} catch(Exception e){
194	<	unexpectedException();
195	<	}
196	<	}
197	<
198	<	/**
199	<	* Timed tryLock on a locked lock times out
200	<	*/
201	<	public void testTryLock_Timeout() {
202	<	final Mutex lock = new Mutex();
203	<	lock.lock();
204	<	Thread t = new Thread(new Runnable() {
205	<	public void run() {
206	<	try {
207	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
208	<	} catch (Exception ex) {
209	<	threadUnexpectedException();
210	<	}
211	<	}
212	<	});
213	<	try {
214	<	t.start();
215	<	t.join();
216	<	lock.unlock();
217	<	} catch(Exception e){
218	<	unexpectedException();
219	<	}
220	<	}
221	<
222	<
223	<	/**
224	<	* isLocked is true when locked and false when not
256	<	*/
257	<	public void testIsLocked() {
258	<	final Mutex lock = new Mutex();
259	<	lock.lock();
260	<	assertTrue(lock.isLocked());
261	<	lock.unlock();
262	<	assertFalse(lock.isLocked());
263	<	Thread t = new Thread(new Runnable() {
264	<	public void run() {
265	<	lock.lock();
266	<	try {
267	<	Thread.sleep(SMALL_DELAY_MS);
268	<	}
269	<	catch(Exception e) {
270	<	threadUnexpectedException();
271	<	}
272	<	lock.unlock();
273	<	}
274	<	});
275	<	try {
276	<	t.start();
277	<	Thread.sleep(SHORT_DELAY_MS);
278	<	assertTrue(lock.isLocked());
279	<	t.join();
280	<	assertFalse(lock.isLocked());
281	<	} catch(Exception e){
282	<	unexpectedException();
179	>	* Checks that condition c has exactly the given waiter threads,
180	>	* after acquiring mutex.
181	>	*/
182	>	void assertHasWaitersUnlocked(Mutex sync, ConditionObject c,
183	>	Thread... threads) {
184	>	sync.acquire();
185	>	assertHasWaitersLocked(sync, c, threads);
186	>	sync.release();
187	>	}
188	>
189	>	/**
190	>	* Checks that condition c has exactly the given waiter threads.
191	>	*/
192	>	void assertHasWaitersLocked(Mutex sync, ConditionObject c,
193	>	Thread... threads) {
194	>	assertEquals(threads.length > 0, sync.hasWaiters(c));
195	>	assertEquals(threads.length, sync.getWaitQueueLength(c));
196	>	assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty());
197	>	assertEquals(threads.length, sync.getWaitingThreads(c).size());
198	>	assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)),
199	>	new HashSet<Thread>(Arrays.asList(threads)));
200	>	}
201	>
202	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
203	>
204	>	/**
205	>	* Awaits condition using the specified AwaitMethod.
206	>	*/
207	>	void await(ConditionObject c, AwaitMethod awaitMethod)
208	>	throws InterruptedException {
209	>	long timeoutMillis = 2 * LONG_DELAY_MS;
210	>	switch (awaitMethod) {
211	>	case await:
212	>	c.await();
213	>	break;
214	>	case awaitTimed:
215	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
216	>	break;
217	>	case awaitNanos:
218	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
219	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
220	>	assertTrue(nanosRemaining > 0);
221	>	break;
222	>	case awaitUntil:
223	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
224	>	break;
225		}
226		}
227
228	+	/**
229	+	* Checks that awaiting the given condition times out (using the
230	+	* default timeout duration).
231	+	*/
232	+	void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
233	+	long timeoutMillis = timeoutMillis();
234	+	long startTime = System.nanoTime();
235	+	try {
236	+	switch (awaitMethod) {
237	+	case awaitTimed:
238	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
239	+	break;
240	+	case awaitNanos:
241	+	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
242	+	long nanosRemaining = c.awaitNanos(nanosTimeout);
243	+	assertTrue(nanosRemaining <= 0);
244	+	break;
245	+	case awaitUntil:
246	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
247	+	break;
248	+	default:
249	+	throw new UnsupportedOperationException();
250	+	}
251	+	} catch (InterruptedException ie) { threadUnexpectedException(ie); }
252	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
253	+	}
254	+
255	+	/**
256	+	* isHeldExclusively is false upon construction
257	+	*/
258	+	public void testIsHeldExclusively() {
259	+	Mutex sync = new Mutex();
260	+	assertFalse(sync.isHeldExclusively());
261	+	}
262	+
263	+	/**
264	+	* acquiring released sync succeeds
265	+	*/
266	+	public void testAcquire() {
267	+	Mutex sync = new Mutex();
268	+	sync.acquire();
269	+	assertTrue(sync.isHeldExclusively());
270	+	sync.release();
271	+	assertFalse(sync.isHeldExclusively());
272	+	}
273	+
274	+	/**
275	+	* tryAcquire on a released sync succeeds
276	+	*/
277	+	public void testTryAcquire() {
278	+	Mutex sync = new Mutex();
279	+	assertTrue(sync.tryAcquire());
280	+	assertTrue(sync.isHeldExclusively());
281	+	sync.release();
282	+	assertFalse(sync.isHeldExclusively());
283	+	}
284
285		/**
286	<	* lockInterruptibly is interruptible.
287	<	*/
288	<	public void testLockInterruptibly1() {
289	<	final Mutex lock = new Mutex();
290	<	lock.lock();
291	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
292	<	try {
293	<	t.start();
294	<	t.interrupt();
295	<	lock.unlock();
296	<	t.join();
297	<	} catch(Exception e){
298	<	unexpectedException();
299	<	}
300	<	}
301	<
302	<	/**
303	<	* lockInterruptibly succeeds when unlocked, else is interruptible
304	<	*/
305	<	public void testLockInterruptibly2() {
306	<	final Mutex lock = new Mutex();
307	<	try {
308	<	lock.lockInterruptibly();
309	<	} catch(Exception e) {
310	<	unexpectedException();
313	<	}
314	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
315	<	try {
316	<	t.start();
317	<	t.interrupt();
318	<	assertTrue(lock.isLocked());
319	<	t.join();
320	<	} catch(Exception e){
321	<	unexpectedException();
322	<	}
323	<	}
324	<
325	<	/**
326	<	* Calling await without holding lock throws IllegalMonitorStateException
327	<	*/
328	<	public void testAwait_IllegalMonitor() {
329	<	final Mutex lock = new Mutex();
330	<	final Condition c = lock.newCondition();
286	>	* hasQueuedThreads reports whether there are waiting threads
287	>	*/
288	>	public void testHasQueuedThreads() {
289	>	final Mutex sync = new Mutex();
290	>	assertFalse(sync.hasQueuedThreads());
291	>	sync.acquire();
292	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
293	>	waitForQueuedThread(sync, t1);
294	>	assertTrue(sync.hasQueuedThreads());
295	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
296	>	waitForQueuedThread(sync, t2);
297	>	assertTrue(sync.hasQueuedThreads());
298	>	t1.interrupt();
299	>	awaitTermination(t1);
300	>	assertTrue(sync.hasQueuedThreads());
301	>	sync.release();
302	>	awaitTermination(t2);
303	>	assertFalse(sync.hasQueuedThreads());
304	>	}
305	>
306	>	/**
307	>	* isQueued(null) throws NullPointerException
308	>	*/
309	>	public void testIsQueuedNPE() {
310	>	final Mutex sync = new Mutex();
311		try {
312	<	c.await();
312	>	sync.isQueued(null);
313		shouldThrow();
314	<	}
315	<	catch (IllegalMonitorStateException success) {
316	<	}
317	<	catch (Exception ex) {
318	<	unexpectedException();
314	>	} catch (NullPointerException success) {}
315	>	}
316	>
317	>	/**
318	>	* isQueued reports whether a thread is queued
319	>	*/
320	>	public void testIsQueued() {
321	>	final Mutex sync = new Mutex();
322	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
323	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
324	>	assertFalse(sync.isQueued(t1));
325	>	assertFalse(sync.isQueued(t2));
326	>	sync.acquire();
327	>	t1.start();
328	>	waitForQueuedThread(sync, t1);
329	>	assertTrue(sync.isQueued(t1));
330	>	assertFalse(sync.isQueued(t2));
331	>	t2.start();
332	>	waitForQueuedThread(sync, t2);
333	>	assertTrue(sync.isQueued(t1));
334	>	assertTrue(sync.isQueued(t2));
335	>	t1.interrupt();
336	>	awaitTermination(t1);
337	>	assertFalse(sync.isQueued(t1));
338	>	assertTrue(sync.isQueued(t2));
339	>	sync.release();
340	>	awaitTermination(t2);
341	>	assertFalse(sync.isQueued(t1));
342	>	assertFalse(sync.isQueued(t2));
343	>	}
344	>
345	>	/**
346	>	* getFirstQueuedThread returns first waiting thread or null if none
347	>	*/
348	>	public void testGetFirstQueuedThread() {
349	>	final Mutex sync = new Mutex();
350	>	assertNull(sync.getFirstQueuedThread());
351	>	sync.acquire();
352	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
353	>	waitForQueuedThread(sync, t1);
354	>	assertEquals(t1, sync.getFirstQueuedThread());
355	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
356	>	waitForQueuedThread(sync, t2);
357	>	assertEquals(t1, sync.getFirstQueuedThread());
358	>	t1.interrupt();
359	>	awaitTermination(t1);
360	>	assertEquals(t2, sync.getFirstQueuedThread());
361	>	sync.release();
362	>	awaitTermination(t2);
363	>	assertNull(sync.getFirstQueuedThread());
364	>	}
365	>
366	>	/**
367	>	* hasContended reports false if no thread has ever blocked, else true
368	>	*/
369	>	public void testHasContended() {
370	>	final Mutex sync = new Mutex();
371	>	assertFalse(sync.hasContended());
372	>	sync.acquire();
373	>	assertFalse(sync.hasContended());
374	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
375	>	waitForQueuedThread(sync, t1);
376	>	assertTrue(sync.hasContended());
377	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
378	>	waitForQueuedThread(sync, t2);
379	>	assertTrue(sync.hasContended());
380	>	t1.interrupt();
381	>	awaitTermination(t1);
382	>	assertTrue(sync.hasContended());
383	>	sync.release();
384	>	awaitTermination(t2);
385	>	assertTrue(sync.hasContended());
386	>	}
387	>
388	>	/**
389	>	* getQueuedThreads returns all waiting threads
390	>	*/
391	>	public void testGetQueuedThreads() {
392	>	final Mutex sync = new Mutex();
393	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
394	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
395	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
396	>	sync.acquire();
397	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
398	>	t1.start();
399	>	waitForQueuedThread(sync, t1);
400	>	assertHasExclusiveQueuedThreads(sync, t1);
401	>	assertTrue(sync.getQueuedThreads().contains(t1));
402	>	assertFalse(sync.getQueuedThreads().contains(t2));
403	>	t2.start();
404	>	waitForQueuedThread(sync, t2);
405	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
406	>	assertTrue(sync.getQueuedThreads().contains(t1));
407	>	assertTrue(sync.getQueuedThreads().contains(t2));
408	>	t1.interrupt();
409	>	awaitTermination(t1);
410	>	assertHasExclusiveQueuedThreads(sync, t2);
411	>	sync.release();
412	>	awaitTermination(t2);
413	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
414	>	}
415	>
416	>	/**
417	>	* getExclusiveQueuedThreads returns all exclusive waiting threads
418	>	*/
419	>	public void testGetExclusiveQueuedThreads() {
420	>	final Mutex sync = new Mutex();
421	>	Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
422	>	Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
423	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
424	>	sync.acquire();
425	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
426	>	t1.start();
427	>	waitForQueuedThread(sync, t1);
428	>	assertHasExclusiveQueuedThreads(sync, t1);
429	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
430	>	assertFalse(sync.getExclusiveQueuedThreads().contains(t2));
431	>	t2.start();
432	>	waitForQueuedThread(sync, t2);
433	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
434	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t1));
435	>	assertTrue(sync.getExclusiveQueuedThreads().contains(t2));
436	>	t1.interrupt();
437	>	awaitTermination(t1);
438	>	assertHasExclusiveQueuedThreads(sync, t2);
439	>	sync.release();
440	>	awaitTermination(t2);
441	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
442	>	}
443	>
444	>	/**
445	>	* getSharedQueuedThreads does not include exclusively waiting threads
446	>	*/
447	>	public void testGetSharedQueuedThreads_Exclusive() {
448	>	final Mutex sync = new Mutex();
449	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
450	>	sync.acquire();
451	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
452	>	Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
453	>	waitForQueuedThread(sync, t1);
454	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
455	>	Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
456	>	waitForQueuedThread(sync, t2);
457	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
458	>	t1.interrupt();
459	>	awaitTermination(t1);
460	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
461	>	sync.release();
462	>	awaitTermination(t2);
463	>	assertTrue(sync.getSharedQueuedThreads().isEmpty());
464	>	}
465	>
466	>	/**
467	>	* getSharedQueuedThreads returns all shared waiting threads
468	>	*/
469	>	public void testGetSharedQueuedThreads_Shared() {
470	>	final BooleanLatch l = new BooleanLatch();
471	>	assertHasSharedQueuedThreads(l, NO_THREADS);
472	>	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
473	>	public void realRun() throws InterruptedException {
474	>	l.acquireSharedInterruptibly(0);
475	>	}});
476	>	waitForQueuedThread(l, t1);
477	>	assertHasSharedQueuedThreads(l, t1);
478	>	Thread t2 = newStartedThread(new CheckedRunnable() {
479	>	public void realRun() throws InterruptedException {
480	>	l.acquireSharedInterruptibly(0);
481	>	}});
482	>	waitForQueuedThread(l, t2);
483	>	assertHasSharedQueuedThreads(l, t1, t2);
484	>	t1.interrupt();
485	>	awaitTermination(t1);
486	>	assertHasSharedQueuedThreads(l, t2);
487	>	assertTrue(l.releaseShared(0));
488	>	awaitTermination(t2);
489	>	assertHasSharedQueuedThreads(l, NO_THREADS);
490	>	}
491	>
492	>	/**
493	>	* tryAcquireNanos is interruptible
494	>	*/
495	>	public void testTryAcquireNanos_Interruptible() {
496	>	final Mutex sync = new Mutex();
497	>	sync.acquire();
498	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
499	>	public void realRun() throws InterruptedException {
500	>	sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
501	>	}});
502	>
503	>	waitForQueuedThread(sync, t);
504	>	t.interrupt();
505	>	awaitTermination(t);
506	>	}
507	>
508	>	/**
509	>	* tryAcquire on exclusively held sync fails
510	>	*/
511	>	public void testTryAcquireWhenSynced() {
512	>	final Mutex sync = new Mutex();
513	>	sync.acquire();
514	>	Thread t = newStartedThread(new CheckedRunnable() {
515	>	public void realRun() {
516	>	assertFalse(sync.tryAcquire());
517	>	}});
518	>
519	>	awaitTermination(t);
520	>	sync.release();
521	>	}
522	>
523	>	/**
524	>	* tryAcquireNanos on an exclusively held sync times out
525	>	*/
526	>	public void testAcquireNanos_Timeout() {
527	>	final Mutex sync = new Mutex();
528	>	sync.acquire();
529	>	Thread t = newStartedThread(new CheckedRunnable() {
530	>	public void realRun() throws InterruptedException {
531	>	long startTime = System.nanoTime();
532	>	long nanos = MILLISECONDS.toNanos(timeoutMillis());
533	>	assertFalse(sync.tryAcquireNanos(nanos));
534	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
535	>	}});
536	>
537	>	awaitTermination(t);
538	>	sync.release();
539	>	}
540	>
541	>	/**
542	>	* getState is true when acquired and false when not
543	>	*/
544	>	public void testGetState() {
545	>	final Mutex sync = new Mutex();
546	>	sync.acquire();
547	>	assertTrue(sync.isHeldExclusively());
548	>	sync.release();
549	>	assertFalse(sync.isHeldExclusively());
550	>
551	>	final BooleanLatch acquired = new BooleanLatch();
552	>	final BooleanLatch done = new BooleanLatch();
553	>	Thread t = newStartedThread(new CheckedRunnable() {
554	>	public void realRun() throws InterruptedException {
555	>	sync.acquire();
556	>	assertTrue(acquired.releaseShared(0));
557	>	done.acquireShared(0);
558	>	sync.release();
559	>	}});
560	>
561	>	acquired.acquireShared(0);
562	>	assertTrue(sync.isHeldExclusively());
563	>	assertTrue(done.releaseShared(0));
564	>	awaitTermination(t);
565	>	assertFalse(sync.isHeldExclusively());
566	>	}
567	>
568	>	/**
569	>	* acquireInterruptibly succeeds when released, else is interruptible
570	>	*/
571	>	public void testAcquireInterruptibly() throws InterruptedException {
572	>	final Mutex sync = new Mutex();
573	>	final BooleanLatch threadStarted = new BooleanLatch();
574	>	sync.acquireInterruptibly();
575	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
576	>	public void realRun() throws InterruptedException {
577	>	assertTrue(threadStarted.releaseShared(0));
578	>	sync.acquireInterruptibly();
579	>	}});
580	>
581	>	threadStarted.acquireShared(0);
582	>	waitForQueuedThread(sync, t);
583	>	t.interrupt();
584	>	awaitTermination(t);
585	>	assertTrue(sync.isHeldExclusively());
586	>	}
587	>
588	>	/**
589	>	* owns is true for a condition created by sync else false
590	>	*/
591	>	public void testOwns() {
592	>	final Mutex sync = new Mutex();
593	>	final ConditionObject c = sync.newCondition();
594	>	final Mutex sync2 = new Mutex();
595	>	assertTrue(sync.owns(c));
596	>	assertFalse(sync2.owns(c));
597	>	}
598	>
599	>	/**
600	>	* Calling await without holding sync throws IllegalMonitorStateException
601	>	*/
602	>	public void testAwait_IMSE() {
603	>	final Mutex sync = new Mutex();
604	>	final ConditionObject c = sync.newCondition();
605	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
606	>	long startTime = System.nanoTime();
607	>	try {
608	>	await(c, awaitMethod);
609	>	shouldThrow();
610	>	} catch (IllegalMonitorStateException success) {
611	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
612	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
613		}
614		}
615
616		/**
617	<	* Calling signal without holding lock throws IllegalMonitorStateException
617	>	* Calling signal without holding sync throws IllegalMonitorStateException
618		*/
619	<	public void testSignal_IllegalMonitor() {
620	<	final Mutex lock = new Mutex();
621	<	final Condition c = lock.newCondition();
619	>	public void testSignal_IMSE() {
620	>	final Mutex sync = new Mutex();
621	>	final ConditionObject c = sync.newCondition();
622		try {
623		c.signal();
624		shouldThrow();
625	<	}
626	<	catch (IllegalMonitorStateException success) {
353	<	}
354	<	catch (Exception ex) {
355	<	unexpectedException();
356	<	}
625	>	} catch (IllegalMonitorStateException success) {}
626	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
627		}
628
629		/**
630	<	* awaitNanos without a signal times out
630	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
631		*/
632	<	public void testAwaitNanos_Timeout() {
633	<	final Mutex lock = new Mutex();
634	<	final Condition c = lock.newCondition();
632	>	public void testSignalAll_IMSE() {
633	>	final Mutex sync = new Mutex();
634	>	final ConditionObject c = sync.newCondition();
635		try {
636	<	lock.lock();
637	<	long t = c.awaitNanos(100);
638	<	assertTrue(t <= 0);
369	<	lock.unlock();
370	<	}
371	<	catch (Exception ex) {
372	<	unexpectedException();
373	<	}
636	>	c.signalAll();
637	>	shouldThrow();
638	>	} catch (IllegalMonitorStateException success) {}
639		}
640
641		/**
642	<	*  timed await without a signal times out
642	>	* await/awaitNanos/awaitUntil without a signal times out
643		*/
644	<	public void testAwait_Timeout() {
645	<	final Mutex lock = new Mutex();
646	<	final Condition c = lock.newCondition();
644	>	public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); }
645	>	public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); }
646	>	public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); }
647	>	public void testAwait_Timeout(AwaitMethod awaitMethod) {
648	>	final Mutex sync = new Mutex();
649	>	final ConditionObject c = sync.newCondition();
650	>	sync.acquire();
651	>	assertAwaitTimesOut(c, awaitMethod);
652	>	sync.release();
653	>	}
654	>
655	>	/**
656	>	* await/awaitNanos/awaitUntil returns when signalled
657	>	*/
658	>	public void testSignal_await()      { testSignal(AwaitMethod.await); }
659	>	public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); }
660	>	public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); }
661	>	public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); }
662	>	public void testSignal(final AwaitMethod awaitMethod) {
663	>	final Mutex sync = new Mutex();
664	>	final ConditionObject c = sync.newCondition();
665	>	final BooleanLatch acquired = new BooleanLatch();
666	>	Thread t = newStartedThread(new CheckedRunnable() {
667	>	public void realRun() throws InterruptedException {
668	>	sync.acquire();
669	>	assertTrue(acquired.releaseShared(0));
670	>	await(c, awaitMethod);
671	>	sync.release();
672	>	}});
673	>
674	>	acquired.acquireShared(0);
675	>	sync.acquire();
676	>	assertHasWaitersLocked(sync, c, t);
677	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
678	>	c.signal();
679	>	assertHasWaitersLocked(sync, c, NO_THREADS);
680	>	assertHasExclusiveQueuedThreads(sync, t);
681	>	sync.release();
682	>	awaitTermination(t);
683	>	}
684	>
685	>	/**
686	>	* hasWaiters(null) throws NullPointerException
687	>	*/
688	>	public void testHasWaitersNPE() {
689	>	final Mutex sync = new Mutex();
690		try {
691	<	lock.lock();
692	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
693	<	lock.unlock();
386	<	}
387	<	catch (Exception ex) {
388	<	unexpectedException();
389	<	}
691	>	sync.hasWaiters(null);
692	>	shouldThrow();
693	>	} catch (NullPointerException success) {}
694		}
695
696		/**
697	<	* awaitUntil without a signal times out
697	>	* getWaitQueueLength(null) throws NullPointerException
698		*/
699	<	public void testAwaitUntil_Timeout() {
700	<	final Mutex lock = new Mutex();
397	<	final Condition c = lock.newCondition();
699	>	public void testGetWaitQueueLengthNPE() {
700	>	final Mutex sync = new Mutex();
701		try {
702	<	lock.lock();
703	<	java.util.Date d = new java.util.Date();
704	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
402	<	lock.unlock();
403	<	}
404	<	catch (Exception ex) {
405	<	unexpectedException();
406	<	}
702	>	sync.getWaitQueueLength(null);
703	>	shouldThrow();
704	>	} catch (NullPointerException success) {}
705		}
706
707		/**
708	<	* await returns when signalled
708	>	* getWaitingThreads(null) throws NullPointerException
709		*/
710	<	public void testAwait() {
711	<	final Mutex lock = new Mutex();
712	<	final Condition c = lock.newCondition();
713	<	Thread t = new Thread(new Runnable() {
714	<	public void run() {
715	<	try {
716	<	lock.lock();
419	<	c.await();
420	<	lock.unlock();
421	<	}
422	<	catch(InterruptedException e) {
423	<	threadUnexpectedException();
424	<	}
425	<	}
426	<	});
710	>	public void testGetWaitingThreadsNPE() {
711	>	final Mutex sync = new Mutex();
712	>	try {
713	>	sync.getWaitingThreads(null);
714	>	shouldThrow();
715	>	} catch (NullPointerException success) {}
716	>	}
717
718	+	/**
719	+	* hasWaiters throws IllegalArgumentException if not owned
720	+	*/
721	+	public void testHasWaitersIAE() {
722	+	final Mutex sync = new Mutex();
723	+	final ConditionObject c = sync.newCondition();
724	+	final Mutex sync2 = new Mutex();
725		try {
726	<	t.start();
727	<	Thread.sleep(SHORT_DELAY_MS);
728	<	lock.lock();
729	<	c.signal();
730	<	lock.unlock();
731	<	t.join(SHORT_DELAY_MS);
732	<	assertFalse(t.isAlive());
733	<	}
734	<	catch (Exception ex) {
735	<	unexpectedException();
736	<	}
726	>	sync2.hasWaiters(c);
727	>	shouldThrow();
728	>	} catch (IllegalArgumentException success) {}
729	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
730	>	}
731	>
732	>	/**
733	>	* hasWaiters throws IllegalMonitorStateException if not synced
734	>	*/
735	>	public void testHasWaitersIMSE() {
736	>	final Mutex sync = new Mutex();
737	>	final ConditionObject c = sync.newCondition();
738	>	try {
739	>	sync.hasWaiters(c);
740	>	shouldThrow();
741	>	} catch (IllegalMonitorStateException success) {}
742	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
743	>	}
744	>
745	>	/**
746	>	* getWaitQueueLength throws IllegalArgumentException if not owned
747	>	*/
748	>	public void testGetWaitQueueLengthIAE() {
749	>	final Mutex sync = new Mutex();
750	>	final ConditionObject c = sync.newCondition();
751	>	final Mutex sync2 = new Mutex();
752	>	try {
753	>	sync2.getWaitQueueLength(c);
754	>	shouldThrow();
755	>	} catch (IllegalArgumentException success) {}
756	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
757	>	}
758	>
759	>	/**
760	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
761	>	*/
762	>	public void testGetWaitQueueLengthIMSE() {
763	>	final Mutex sync = new Mutex();
764	>	final ConditionObject c = sync.newCondition();
765	>	try {
766	>	sync.getWaitQueueLength(c);
767	>	shouldThrow();
768	>	} catch (IllegalMonitorStateException success) {}
769	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
770	>	}
771	>
772	>	/**
773	>	* getWaitingThreads throws IllegalArgumentException if not owned
774	>	*/
775	>	public void testGetWaitingThreadsIAE() {
776	>	final Mutex sync = new Mutex();
777	>	final ConditionObject c = sync.newCondition();
778	>	final Mutex sync2 = new Mutex();
779	>	try {
780	>	sync2.getWaitingThreads(c);
781	>	shouldThrow();
782	>	} catch (IllegalArgumentException success) {}
783	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
784	>	}
785	>
786	>	/**
787	>	* getWaitingThreads throws IllegalMonitorStateException if not synced
788	>	*/
789	>	public void testGetWaitingThreadsIMSE() {
790	>	final Mutex sync = new Mutex();
791	>	final ConditionObject c = sync.newCondition();
792	>	try {
793	>	sync.getWaitingThreads(c);
794	>	shouldThrow();
795	>	} catch (IllegalMonitorStateException success) {}
796	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
797	>	}
798	>
799	>	/**
800	>	* hasWaiters returns true when a thread is waiting, else false
801	>	*/
802	>	public void testHasWaiters() {
803	>	final Mutex sync = new Mutex();
804	>	final ConditionObject c = sync.newCondition();
805	>	final BooleanLatch acquired = new BooleanLatch();
806	>	Thread t = newStartedThread(new CheckedRunnable() {
807	>	public void realRun() throws InterruptedException {
808	>	sync.acquire();
809	>	assertHasWaitersLocked(sync, c, NO_THREADS);
810	>	assertFalse(sync.hasWaiters(c));
811	>	assertTrue(acquired.releaseShared(0));
812	>	c.await();
813	>	sync.release();
814	>	}});
815	>
816	>	acquired.acquireShared(0);
817	>	sync.acquire();
818	>	assertHasWaitersLocked(sync, c, t);
819	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
820	>	assertTrue(sync.hasWaiters(c));
821	>	c.signal();
822	>	assertHasWaitersLocked(sync, c, NO_THREADS);
823	>	assertHasExclusiveQueuedThreads(sync, t);
824	>	assertFalse(sync.hasWaiters(c));
825	>	sync.release();
826	>
827	>	awaitTermination(t);
828	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
829	>	}
830	>
831	>	/**
832	>	* getWaitQueueLength returns number of waiting threads
833	>	*/
834	>	public void testGetWaitQueueLength() {
835	>	final Mutex sync = new Mutex();
836	>	final ConditionObject c = sync.newCondition();
837	>	final BooleanLatch acquired1 = new BooleanLatch();
838	>	final BooleanLatch acquired2 = new BooleanLatch();
839	>	final Thread t1 = newStartedThread(new CheckedRunnable() {
840	>	public void realRun() throws InterruptedException {
841	>	sync.acquire();
842	>	assertHasWaitersLocked(sync, c, NO_THREADS);
843	>	assertEquals(0, sync.getWaitQueueLength(c));
844	>	assertTrue(acquired1.releaseShared(0));
845	>	c.await();
846	>	sync.release();
847	>	}});
848	>	acquired1.acquireShared(0);
849	>	sync.acquire();
850	>	assertHasWaitersLocked(sync, c, t1);
851	>	assertEquals(1, sync.getWaitQueueLength(c));
852	>	sync.release();
853	>
854	>	final Thread t2 = newStartedThread(new CheckedRunnable() {
855	>	public void realRun() throws InterruptedException {
856	>	sync.acquire();
857	>	assertHasWaitersLocked(sync, c, t1);
858	>	assertEquals(1, sync.getWaitQueueLength(c));
859	>	assertTrue(acquired2.releaseShared(0));
860	>	c.await();
861	>	sync.release();
862	>	}});
863	>	acquired2.acquireShared(0);
864	>	sync.acquire();
865	>	assertHasWaitersLocked(sync, c, t1, t2);
866	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
867	>	assertEquals(2, sync.getWaitQueueLength(c));
868	>	c.signalAll();
869	>	assertHasWaitersLocked(sync, c, NO_THREADS);
870	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
871	>	assertEquals(0, sync.getWaitQueueLength(c));
872	>	sync.release();
873	>
874	>	awaitTermination(t1);
875	>	awaitTermination(t2);
876	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
877	>	}
878	>
879	>	/**
880	>	* getWaitingThreads returns only and all waiting threads
881	>	*/
882	>	public void testGetWaitingThreads() {
883	>	final Mutex sync = new Mutex();
884	>	final ConditionObject c = sync.newCondition();
885	>	final BooleanLatch acquired1 = new BooleanLatch();
886	>	final BooleanLatch acquired2 = new BooleanLatch();
887	>	final Thread t1 = new Thread(new CheckedRunnable() {
888	>	public void realRun() throws InterruptedException {
889	>	sync.acquire();
890	>	assertHasWaitersLocked(sync, c, NO_THREADS);
891	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
892	>	assertTrue(acquired1.releaseShared(0));
893	>	c.await();
894	>	sync.release();
895	>	}});
896	>
897	>	final Thread t2 = new Thread(new CheckedRunnable() {
898	>	public void realRun() throws InterruptedException {
899	>	sync.acquire();
900	>	assertHasWaitersLocked(sync, c, t1);
901	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
902	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
903	>	assertEquals(1, sync.getWaitingThreads(c).size());
904	>	assertTrue(acquired2.releaseShared(0));
905	>	c.await();
906	>	sync.release();
907	>	}});
908	>
909	>	sync.acquire();
910	>	assertHasWaitersLocked(sync, c, NO_THREADS);
911	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
912	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
913	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
914	>	assertEquals(0, sync.getWaitingThreads(c).size());
915	>	sync.release();
916	>
917	>	t1.start();
918	>	acquired1.acquireShared(0);
919	>	sync.acquire();
920	>	assertHasWaitersLocked(sync, c, t1);
921	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
922	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
923	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
924	>	assertEquals(1, sync.getWaitingThreads(c).size());
925	>	sync.release();
926	>
927	>	t2.start();
928	>	acquired2.acquireShared(0);
929	>	sync.acquire();
930	>	assertHasWaitersLocked(sync, c, t1, t2);
931	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
932	>	assertTrue(sync.getWaitingThreads(c).contains(t1));
933	>	assertTrue(sync.getWaitingThreads(c).contains(t2));
934	>	assertFalse(sync.getWaitingThreads(c).isEmpty());
935	>	assertEquals(2, sync.getWaitingThreads(c).size());
936	>	c.signalAll();
937	>	assertHasWaitersLocked(sync, c, NO_THREADS);
938	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
939	>	assertFalse(sync.getWaitingThreads(c).contains(t1));
940	>	assertFalse(sync.getWaitingThreads(c).contains(t2));
941	>	assertTrue(sync.getWaitingThreads(c).isEmpty());
942	>	assertEquals(0, sync.getWaitingThreads(c).size());
943	>	sync.release();
944	>
945	>	awaitTermination(t1);
946	>	awaitTermination(t2);
947	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
948	>	}
949	>
950	>	/**
951	>	* awaitUninterruptibly is uninterruptible
952	>	*/
953	>	public void testAwaitUninterruptibly() {
954	>	final Mutex sync = new Mutex();
955	>	final ConditionObject c = sync.newCondition();
956	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
957	>	Thread t = newStartedThread(new CheckedRunnable() {
958	>	public void realRun() {
959	>	sync.acquire();
960	>	assertTrue(pleaseInterrupt.releaseShared(0));
961	>	c.awaitUninterruptibly();
962	>	assertTrue(Thread.interrupted());
963	>	assertHasWaitersLocked(sync, c, NO_THREADS);
964	>	sync.release();
965	>	}});
966	>
967	>	pleaseInterrupt.acquireShared(0);
968	>	sync.acquire();
969	>	assertHasWaitersLocked(sync, c, t);
970	>	sync.release();
971	>	t.interrupt();
972	>	assertHasWaitersUnlocked(sync, c, t);
973	>	assertThreadStaysAlive(t);
974	>	sync.acquire();
975	>	assertHasWaitersLocked(sync, c, t);
976	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
977	>	c.signal();
978	>	assertHasWaitersLocked(sync, c, NO_THREADS);
979	>	assertHasExclusiveQueuedThreads(sync, t);
980	>	sync.release();
981	>	awaitTermination(t);
982	>	}
983	>
984	>	/**
985	>	* await/awaitNanos/awaitUntil is interruptible
986	>	*/
987	>	public void testInterruptible_await()      { testInterruptible(AwaitMethod.await); }
988	>	public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); }
989	>	public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); }
990	>	public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); }
991	>	public void testInterruptible(final AwaitMethod awaitMethod) {
992	>	final Mutex sync = new Mutex();
993	>	final ConditionObject c = sync.newCondition();
994	>	final BooleanLatch pleaseInterrupt = new BooleanLatch();
995	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
996	>	public void realRun() throws InterruptedException {
997	>	sync.acquire();
998	>	assertTrue(pleaseInterrupt.releaseShared(0));
999	>	await(c, awaitMethod);
1000	>	}});
1001	>
1002	>	pleaseInterrupt.acquireShared(0);
1003	>	t.interrupt();
1004	>	awaitTermination(t);
1005	>	}
1006	>
1007	>	/**
1008	>	* signalAll wakes up all threads
1009	>	*/
1010	>	public void testSignalAll_await()      { testSignalAll(AwaitMethod.await); }
1011	>	public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); }
1012	>	public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); }
1013	>	public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); }
1014	>	public void testSignalAll(final AwaitMethod awaitMethod) {
1015	>	final Mutex sync = new Mutex();
1016	>	final ConditionObject c = sync.newCondition();
1017	>	final BooleanLatch acquired1 = new BooleanLatch();
1018	>	final BooleanLatch acquired2 = new BooleanLatch();
1019	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1020	>	public void realRun() throws InterruptedException {
1021	>	sync.acquire();
1022	>	acquired1.releaseShared(0);
1023	>	await(c, awaitMethod);
1024	>	sync.release();
1025	>	}});
1026	>
1027	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1028	>	public void realRun() throws InterruptedException {
1029	>	sync.acquire();
1030	>	acquired2.releaseShared(0);
1031	>	await(c, awaitMethod);
1032	>	sync.release();
1033	>	}});
1034	>
1035	>	acquired1.acquireShared(0);
1036	>	acquired2.acquireShared(0);
1037	>	sync.acquire();
1038	>	assertHasWaitersLocked(sync, c, t1, t2);
1039	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1040	>	c.signalAll();
1041	>	assertHasWaitersLocked(sync, c, NO_THREADS);
1042	>	assertHasExclusiveQueuedThreads(sync, t1, t2);
1043	>	sync.release();
1044	>	awaitTermination(t1);
1045	>	awaitTermination(t2);
1046	>	}
1047	>
1048	>	/**
1049	>	* toString indicates current state
1050	>	*/
1051	>	public void testToString() {
1052	>	Mutex sync = new Mutex();
1053	>	assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED));
1054	>	sync.acquire();
1055	>	assertTrue(sync.toString().contains("State = " + Mutex.LOCKED));
1056	>	}
1057	>
1058	>	/**
1059	>	* A serialized AQS deserializes with current state, but no queued threads
1060	>	*/
1061	>	public void testSerialization() {
1062	>	Mutex sync = new Mutex();
1063	>	assertFalse(serialClone(sync).isHeldExclusively());
1064	>	sync.acquire();
1065	>	Thread t = newStartedThread(new InterruptedSyncRunnable(sync));
1066	>	waitForQueuedThread(sync, t);
1067	>	assertTrue(sync.isHeldExclusively());
1068	>
1069	>	Mutex clone = serialClone(sync);
1070	>	assertTrue(clone.isHeldExclusively());
1071	>	assertHasExclusiveQueuedThreads(sync, t);
1072	>	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1073	>	t.interrupt();
1074	>	awaitTermination(t);
1075	>	sync.release();
1076	>	assertFalse(sync.isHeldExclusively());
1077	>	assertTrue(clone.isHeldExclusively());
1078	>	assertHasExclusiveQueuedThreads(sync, NO_THREADS);
1079	>	assertHasExclusiveQueuedThreads(clone, NO_THREADS);
1080	>	}
1081	>
1082	>	/**
1083	>	* tryReleaseShared setting state changes getState
1084	>	*/
1085	>	public void testGetStateWithReleaseShared() {
1086	>	final BooleanLatch l = new BooleanLatch();
1087	>	assertFalse(l.isSignalled());
1088	>	assertTrue(l.releaseShared(0));
1089	>	assertTrue(l.isSignalled());
1090	>	}
1091	>
1092	>	/**
1093	>	* releaseShared has no effect when already signalled
1094	>	*/
1095	>	public void testReleaseShared() {
1096	>	final BooleanLatch l = new BooleanLatch();
1097	>	assertFalse(l.isSignalled());
1098	>	assertTrue(l.releaseShared(0));
1099	>	assertTrue(l.isSignalled());
1100	>	assertTrue(l.releaseShared(0));
1101	>	assertTrue(l.isSignalled());
1102		}
1103	<
1103	>
1104	>	/**
1105	>	* acquireSharedInterruptibly returns after release, but not before
1106	>	*/
1107	>	public void testAcquireSharedInterruptibly() {
1108	>	final BooleanLatch l = new BooleanLatch();
1109	>
1110	>	Thread t = newStartedThread(new CheckedRunnable() {
1111	>	public void realRun() throws InterruptedException {
1112	>	assertFalse(l.isSignalled());
1113	>	l.acquireSharedInterruptibly(0);
1114	>	assertTrue(l.isSignalled());
1115	>	l.acquireSharedInterruptibly(0);
1116	>	assertTrue(l.isSignalled());
1117	>	}});
1118	>
1119	>	waitForQueuedThread(l, t);
1120	>	assertFalse(l.isSignalled());
1121	>	assertThreadStaysAlive(t);
1122	>	assertHasSharedQueuedThreads(l, t);
1123	>	assertTrue(l.releaseShared(0));
1124	>	assertTrue(l.isSignalled());
1125	>	awaitTermination(t);
1126	>	}
1127	>
1128	>	/**
1129	>	* tryAcquireSharedNanos returns after release, but not before
1130	>	*/
1131	>	public void testTryAcquireSharedNanos() {
1132	>	final BooleanLatch l = new BooleanLatch();
1133	>
1134	>	Thread t = newStartedThread(new CheckedRunnable() {
1135	>	public void realRun() throws InterruptedException {
1136	>	assertFalse(l.isSignalled());
1137	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1138	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1139	>	assertTrue(l.isSignalled());
1140	>	assertTrue(l.tryAcquireSharedNanos(0, nanos));
1141	>	assertTrue(l.isSignalled());
1142	>	}});
1143	>
1144	>	waitForQueuedThread(l, t);
1145	>	assertFalse(l.isSignalled());
1146	>	assertThreadStaysAlive(t);
1147	>	assertTrue(l.releaseShared(0));
1148	>	assertTrue(l.isSignalled());
1149	>	awaitTermination(t);
1150	>	}
1151	>
1152	>	/**
1153	>	* acquireSharedInterruptibly is interruptible
1154	>	*/
1155	>	public void testAcquireSharedInterruptibly_Interruptible() {
1156	>	final BooleanLatch l = new BooleanLatch();
1157	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1158	>	public void realRun() throws InterruptedException {
1159	>	assertFalse(l.isSignalled());
1160	>	l.acquireSharedInterruptibly(0);
1161	>	}});
1162	>
1163	>	waitForQueuedThread(l, t);
1164	>	assertFalse(l.isSignalled());
1165	>	t.interrupt();
1166	>	awaitTermination(t);
1167	>	assertFalse(l.isSignalled());
1168	>	}
1169	>
1170	>	/**
1171	>	* tryAcquireSharedNanos is interruptible
1172	>	*/
1173	>	public void testTryAcquireSharedNanos_Interruptible() {
1174	>	final BooleanLatch l = new BooleanLatch();
1175	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1176	>	public void realRun() throws InterruptedException {
1177	>	assertFalse(l.isSignalled());
1178	>	long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
1179	>	l.tryAcquireSharedNanos(0, nanos);
1180	>	}});
1181	>
1182	>	waitForQueuedThread(l, t);
1183	>	assertFalse(l.isSignalled());
1184	>	t.interrupt();
1185	>	awaitTermination(t);
1186	>	assertFalse(l.isSignalled());
1187	>	}
1188	>
1189	>	/**
1190	>	* tryAcquireSharedNanos times out if not released before timeout
1191	>	*/
1192	>	public void testTryAcquireSharedNanos_Timeout() {
1193	>	final BooleanLatch l = new BooleanLatch();
1194	>	final BooleanLatch observedQueued = new BooleanLatch();
1195	>	final long timeoutMillis = timeoutMillis();
1196	>	Thread t = newStartedThread(new CheckedRunnable() {
1197	>	public void realRun() throws InterruptedException {
1198	>	assertFalse(l.isSignalled());
1199	>	for (long millis = timeoutMillis();
1200	>	!observedQueued.isSignalled();
1201	>	millis *= 2) {
1202	>	long nanos = MILLISECONDS.toNanos(millis);
1203	>	long startTime = System.nanoTime();
1204	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1205	>	assertTrue(millisElapsedSince(startTime) >= millis);
1206	>	}
1207	>	assertFalse(l.isSignalled());
1208	>	}});
1209	>
1210	>	waitForQueuedThread(l, t);
1211	>	observedQueued.releaseShared(0);
1212	>	assertFalse(l.isSignalled());
1213	>	awaitTermination(t);
1214	>	assertFalse(l.isSignalled());
1215	>	}
1216	>
1217	>	/**
1218	>	* awaitNanos/timed await with 0 wait times out immediately
1219	>	*/
1220	>	public void testAwait_Zero() throws InterruptedException {
1221	>	final Mutex sync = new Mutex();
1222	>	final ConditionObject c = sync.newCondition();
1223	>	sync.acquire();
1224	>	assertTrue(c.awaitNanos(0L) <= 0);
1225	>	assertFalse(c.await(0L, NANOSECONDS));
1226	>	sync.release();
1227	>	}
1228	>
1229	>	/**
1230	>	* awaitNanos/timed await with maximum negative wait times does not underflow
1231	>	*/
1232	>	public void testAwait_NegativeInfinity() throws InterruptedException {
1233	>	final Mutex sync = new Mutex();
1234	>	final ConditionObject c = sync.newCondition();
1235	>	sync.acquire();
1236	>	assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0);
1237	>	assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS));
1238	>	sync.release();
1239	>	}
1240	>
1241		}

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