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Comparing jsr166/src/test/tck/AbstractQueuedSynchronizerTest.java (file contents):
Revision 1.14 by dl, Sat Jan 10 01:41:59 2004 UTC vs.
Revision 1.44 by jsr166, Thu May 2 18:01:09 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, adapted from the
25	<	* AbstractQueuedSynchronizer javadoc.  Exclusive acquire tests
26	<	* exercise this as a sample user extension.  Other
27	<	* methods/features of AbstractQueuedSynchronizerTest are tested
28	<	* via other test classes, including those for ReentrantLock,
30	<	* ReentrantReadWriteLock, and Semaphore
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	<	public boolean isLocked() { return getState() == 1; }
32	<
33	<	public boolean tryAcquireExclusive(int acquires) {
34	<	assertTrue(acquires == 1);
35	<	return compareAndSetState(0, 1);
36	<	}
37	<
38	<	public boolean tryReleaseExclusive(int releases) {
39	<	setState(0);
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	>	@Override public boolean tryAcquire(int acquires) {
43	>	assertEquals(LOCKED, acquires);
44	>	return compareAndSetState(UNLOCKED, LOCKED);
45	>	}
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	<
54	<	public void checkConditionAccess(Thread thread) {
55	<	if (getState() == 0) throw new IllegalMonitorStateException();
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	<
70	<	public ConditionObject newCondition() { return new ConditionObject(); }
71	<
72	<	public void lock() {
73	<	acquireExclusiveUninterruptibly(1);
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	+	}
81		}
82
57	–
83		/**
84		* A simple latch class, to test shared mode.
85		*/
86	<	static class BooleanLatch extends AbstractQueuedSynchronizer {
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;
90	>	return isSignalled() ? 1 : -1;
91		}
92	<
92	>
93		public boolean tryReleaseShared(int ignore) {
94		setState(1);
95		return true;
#	Line 72 | Line 97 | public class AbstractQueuedSynchronizerT
97		}
98
99		/**
100	<	* A runnable calling acquireExclusiveInterruptibly
100	>	* A runnable calling acquireInterruptibly that does not expect to
101	>	* be interrupted.
102		*/
103	<	class InterruptibleLockRunnable implements Runnable {
104	<	final Mutex lock;
105	<	InterruptibleLockRunnable(Mutex l) { lock = l; }
106	<	public void run() {
107	<	try {
108	<	lock.acquireExclusiveInterruptibly(1);
109	<	} catch(InterruptedException success){}
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 acquireInterruptibly that expects to be
113	>	* interrupted.
114	>	*/
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
123	+	/** A constant to clarify calls to checking methods below. */
124	+	static final Thread[] NO_THREADS = new Thread[0];
125
126		/**
127	<	* A runnable calling acquireExclusiveInterruptibly that expects to be
90	<	* interrupted
127	>	* Spin-waits until sync.isQueued(t) becomes true.
128		*/
129	<	class InterruptedLockRunnable implements Runnable {
130	<	final Mutex lock;
131	<	InterruptedLockRunnable(Mutex l) { lock = l; }
132	<	public void run() {
133	<	try {
134	<	lock.acquireExclusiveInterruptibly(1);
98	<	threadShouldThrow();
99	<	} catch(InterruptedException success){}
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	<
138	>
139		/**
140	<	* acquireExclusiveUninterruptiblying an releaseExclusiveed lock succeeds
140	>	* Checks that sync has exactly the given queued threads.
141		*/
142	<	public void testAcquireExclusiveUninterruptibly() {
143	<	Mutex rl = new Mutex();
144	<	rl.acquireExclusiveUninterruptibly(1);
145	<	assertTrue(rl.isLocked());
146	<	rl.releaseExclusive(1);
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	<	* tryAcquireExclusive on an releaseExclusiveed lock succeeds
154	>	* Checks that sync has exactly the given (exclusive) queued threads.
155		*/
156	<	public void testTryAcquireExclusive() {
157	<	Mutex rl = new Mutex();
158	<	assertTrue(rl.tryAcquireExclusive(1));
159	<	assertTrue(rl.isLocked());
160	<	rl.releaseExclusive(1);
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	<	* hasQueuedThreads reports whether there are waiting threads
166	>	* Checks that sync has exactly the given (shared) queued threads.
167		*/
168	<	public void testhasQueuedThreads() {
169	<	final Mutex lock = new Mutex();
170	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
171	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
172	<	try {
173	<	assertFalse(lock.hasQueuedThreads());
174	<	lock.acquireExclusiveUninterruptibly(1);
175	<	t1.start();
176	<	Thread.sleep(SHORT_DELAY_MS);
177	<	assertTrue(lock.hasQueuedThreads());
178	<	t2.start();
179	<	Thread.sleep(SHORT_DELAY_MS);
180	<	assertTrue(lock.hasQueuedThreads());
181	<	t1.interrupt();
182	<	Thread.sleep(SHORT_DELAY_MS);
183	<	assertTrue(lock.hasQueuedThreads());
184	<	lock.releaseExclusive(1);
185	<	Thread.sleep(SHORT_DELAY_MS);
186	<	assertFalse(lock.hasQueuedThreads());
187	<	t1.join();
188	<	t2.join();
189	<	} catch(Exception e){
190	<	unexpectedException();
191	<	}
192	<	}
193	<
194	<	/**
195	<	* isQueued(null) throws NPE
196	<	*/
197	<	public void testIsQueuedNPE() {
198	<	final Mutex lock = new Mutex();
199	<	try {
158	<	lock.isQueued(null);
159	<	shouldThrow();
160	<	} catch (NullPointerException success) {
161	<	}
162	<	}
163	<
164	<	/**
165	<	* isQueued reports whether a thread is queued.
166	<	*/
167	<	public void testIsQueued() {
168	<	final Mutex lock = new Mutex();
169	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
170	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
171	<	try {
172	<	assertFalse(lock.isQueued(t1));
173	<	assertFalse(lock.isQueued(t2));
174	<	lock.acquireExclusiveUninterruptibly(1);
175	<	t1.start();
176	<	Thread.sleep(SHORT_DELAY_MS);
177	<	assertTrue(lock.isQueued(t1));
178	<	t2.start();
179	<	Thread.sleep(SHORT_DELAY_MS);
180	<	assertTrue(lock.isQueued(t1));
181	<	assertTrue(lock.isQueued(t2));
182	<	t1.interrupt();
183	<	Thread.sleep(SHORT_DELAY_MS);
184	<	assertFalse(lock.isQueued(t1));
185	<	assertTrue(lock.isQueued(t2));
186	<	lock.releaseExclusive(1);
187	<	Thread.sleep(SHORT_DELAY_MS);
188	<	assertFalse(lock.isQueued(t1));
189	<	assertFalse(lock.isQueued(t2));
190	<	t1.join();
191	<	t2.join();
192	<	} catch(Exception e){
193	<	unexpectedException();
194	<	}
195	<	}
196	<
197	<	/**
198	<	* getFirstQueuedThread returns first waiting thread or null is none
199	<	*/
200	<	public void testGetFirstQueuedThread() {
201	<	final Mutex lock = new Mutex();
202	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
203	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
204	<	try {
205	<	assertNull(lock.getFirstQueuedThread());
206	<	lock.acquireExclusiveUninterruptibly(1);
207	<	t1.start();
208	<	Thread.sleep(SHORT_DELAY_MS);
209	<	assertEquals(t1, lock.getFirstQueuedThread());
210	<	t2.start();
211	<	Thread.sleep(SHORT_DELAY_MS);
212	<	assertEquals(t1, lock.getFirstQueuedThread());
213	<	t1.interrupt();
214	<	Thread.sleep(SHORT_DELAY_MS);
215	<	assertEquals(t2, lock.getFirstQueuedThread());
216	<	lock.releaseExclusive(1);
217	<	Thread.sleep(SHORT_DELAY_MS);
218	<	assertNull(lock.getFirstQueuedThread());
219	<	t1.join();
220	<	t2.join();
221	<	} catch(Exception e){
222	<	unexpectedException();
223	<	}
224	<	}
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	<	* hasContended reports false if no thread has ever blocked, else true
204	>	* Awaits condition using the specified AwaitMethod.
205		*/
206	<	public void testHasContended() {
207	<	final Mutex lock = new Mutex();
208	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
209	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
210	<	try {
211	<	assertFalse(lock.hasContended());
212	<	lock.acquireExclusiveUninterruptibly(1);
213	<	t1.start();
214	<	Thread.sleep(SHORT_DELAY_MS);
215	<	assertTrue(lock.hasContended());
216	<	t2.start();
217	<	Thread.sleep(SHORT_DELAY_MS);
218	<	assertTrue(lock.hasContended());
219	<	t1.interrupt();
220	<	Thread.sleep(SHORT_DELAY_MS);
221	<	assertTrue(lock.hasContended());
222	<	lock.releaseExclusive(1);
223	<	Thread.sleep(SHORT_DELAY_MS);
248	<	assertTrue(lock.hasContended());
249	<	t1.join();
250	<	t2.join();
251	<	} catch(Exception e){
252	<	unexpectedException();
253	<	}
254	<	}
255	<
256	<	/**
257	<	* acquireExclusiveNanos is interruptible.
258	<	*/
259	<	public void testInterruptedException2() {
260	<	final Mutex lock = new Mutex();
261	<	lock.acquireExclusiveUninterruptibly(1);
262	<	Thread t = new Thread(new Runnable() {
263	<	public void run() {
264	<	try {
265	<	lock.acquireExclusiveNanos(1, MEDIUM_DELAY_MS * 1000 * 1000);
266	<	threadShouldThrow();
267	<	} catch(InterruptedException success){}
268	<	}
269	<	});
270	<	try {
271	<	t.start();
272	<	t.interrupt();
273	<	} catch(Exception e){
274	<	unexpectedException();
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	+	* 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	+	sync.isQueued(null);
312	+	shouldThrow();
313	+	} catch (NullPointerException success) {}
314	+	}
315
316		/**
317	<	* TryAcquireExclusive on a locked lock fails
318	<	*/
319	<	public void testTryAcquireExclusiveWhenLocked() {
320	<	final Mutex lock = new Mutex();
321	<	lock.acquireExclusiveUninterruptibly(1);
322	<	Thread t = new Thread(new Runnable() {
323	<	public void run() {
324	<	threadAssertFalse(lock.tryAcquireExclusive(1));
325	<	}
326	<	});
327	<	try {
328	<	t.start();
329	<	t.join();
330	<	lock.releaseExclusive(1);
331	<	} catch(Exception e){
332	<	unexpectedException();
333	<	}
334	<	}
335	<
336	<	/**
337	<	* acquireExclusiveNanos on a locked lock times out
338	<	*/
339	<	public void testAcquireExclusiveNanos_Timeout() {
340	<	final Mutex lock = new Mutex();
341	<	lock.acquireExclusiveUninterruptibly(1);
342	<	Thread t = new Thread(new Runnable() {
343	<	public void run() {
344	<	try {
345	<	threadAssertFalse(lock.acquireExclusiveNanos(1, 1000 * 1000));
346	<	} catch (Exception ex) {
347	<	threadUnexpectedException();
348	<	}
349	<	}
350	<	});
351	<	try {
352	<	t.start();
353	<	t.join();
354	<	lock.releaseExclusive(1);
355	<	} catch(Exception e){
356	<	unexpectedException();
357	<	}
358	<	}
359	<
360	<
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 lock = new Mutex();
545	<	lock.acquireExclusiveUninterruptibly(1);
546	<	assertTrue(lock.isLocked());
547	<	lock.releaseExclusive(1);
548	<	assertFalse(lock.isLocked());
549	<	Thread t = new Thread(new Runnable() {
550	<	public void run() {
551	<	lock.acquireExclusiveUninterruptibly(1);
552	<	try {
553	<	Thread.sleep(SMALL_DELAY_MS);
554	<	}
555	<	catch(Exception e) {
556	<	threadUnexpectedException();
557	<	}
558	<	lock.releaseExclusive(1);
559	<	}
560	<	});
561	<	try {
562	<	t.start();
563	<	Thread.sleep(SHORT_DELAY_MS);
564	<	assertTrue(lock.isLocked());
349	<	t.join();
350	<	assertFalse(lock.isLocked());
351	<	} catch(Exception e){
352	<	unexpectedException();
353	<	}
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	<	* acquireExclusiveInterruptibly is interruptible.
600	<	*/
601	<	public void testAcquireInterruptibly1() {
602	<	final Mutex lock = new Mutex();
603	<	lock.acquireExclusiveUninterruptibly(1);
604	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
605	<	try {
606	<	t.start();
607	<	t.interrupt();
608	<	lock.releaseExclusive(1);
609	<	t.join();
610	<	} catch(Exception e){
611	<	unexpectedException();
371	<	}
372	<	}
373	<
374	<	/**
375	<	* acquireExclusiveInterruptibly succeeds when released, else is interruptible
376	<	*/
377	<	public void testAcquireInterruptibly2() {
378	<	final Mutex lock = new Mutex();
379	<	try {
380	<	lock.acquireExclusiveInterruptibly(1);
381	<	} catch(Exception e) {
382	<	unexpectedException();
383	<	}
384	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
385	<	try {
386	<	t.start();
387	<	t.interrupt();
388	<	assertTrue(lock.isLocked());
389	<	t.join();
390	<	} catch(Exception e){
391	<	unexpectedException();
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	<	* owns is true for a condition created by lock else false
616	>	* Calling signal without holding sync throws IllegalMonitorStateException
617		*/
618	<	public void testOwns() {
619	<	final Mutex lock = new Mutex();
620	<	final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition();
621	<	final Mutex lock2 = new Mutex();
622	<	assertTrue(lock.owns(c));
623	<	assertFalse(lock2.owns(c));
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	>	} catch (IllegalMonitorStateException success) {}
625	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
626		}
627
628		/**
629	<	* Calling await without holding lock throws IllegalMonitorStateException
629	>	* Calling signalAll without holding sync throws IllegalMonitorStateException
630		*/
631	<	public void testAwait_IllegalMonitor() {
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	<	c.await();
635	>	c.signalAll();
636		shouldThrow();
637	<	}
416	<	catch (IllegalMonitorStateException success) {
417	<	}
418	<	catch (Exception ex) {
419	<	unexpectedException();
420	<	}
637	>	} catch (IllegalMonitorStateException success) {}
638		}
639
640		/**
641	<	* Calling signal without holding lock throws IllegalMonitorStateException
641	>	* await/awaitNanos/awaitUntil without a signal times out
642		*/
643	<	public void testSignal_IllegalMonitor() {
644	<	final Mutex lock = new Mutex();
645	<	final Condition c = lock.newCondition();
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	>	* hasWaiters(null) throws NullPointerException
686	>	*/
687	>	public void testHasWaitersNPE() {
688	>	final Mutex sync = new Mutex();
689		try {
690	<	c.signal();
690	>	sync.hasWaiters(null);
691		shouldThrow();
692	<	}
433	<	catch (IllegalMonitorStateException success) {
434	<	}
435	<	catch (Exception ex) {
436	<	unexpectedException();
437	<	}
692	>	} catch (NullPointerException success) {}
693		}
694
695		/**
696	<	* awaitNanos without a signal times out
696	>	* getWaitQueueLength(null) throws NullPointerException
697		*/
698	<	public void testAwaitNanos_Timeout() {
699	<	final Mutex lock = new Mutex();
445	<	final Condition c = lock.newCondition();
698	>	public void testGetWaitQueueLengthNPE() {
699	>	final Mutex sync = new Mutex();
700		try {
701	<	lock.acquireExclusiveUninterruptibly(1);
702	<	long t = c.awaitNanos(100);
703	<	assertTrue(t <= 0);
450	<	lock.releaseExclusive(1);
451	<	}
452	<	catch (Exception ex) {
453	<	unexpectedException();
454	<	}
701	>	sync.getWaitQueueLength(null);
702	>	shouldThrow();
703	>	} catch (NullPointerException success) {}
704		}
705
706		/**
707	<	*  timed await without a signal times out
707	>	* getWaitingThreads(null) throws NullPointerException
708		*/
709	<	public void testAwait_Timeout() {
710	<	final Mutex lock = new Mutex();
462	<	final Condition c = lock.newCondition();
709	>	public void testGetWaitingThreadsNPE() {
710	>	final Mutex sync = new Mutex();
711		try {
712	<	lock.acquireExclusiveUninterruptibly(1);
713	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
714	<	lock.releaseExclusive(1);
467	<	}
468	<	catch (Exception ex) {
469	<	unexpectedException();
470	<	}
712	>	sync.getWaitingThreads(null);
713	>	shouldThrow();
714	>	} catch (NullPointerException success) {}
715		}
716
717		/**
718	<	* awaitUntil without a signal times out
718	>	* hasWaiters throws IllegalArgumentException if not owned
719		*/
720	<	public void testAwaitUntil_Timeout() {
721	<	final Mutex lock = new Mutex();
722	<	final Condition c = lock.newCondition();
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	<	lock.acquireExclusiveUninterruptibly(1);
726	<	java.util.Date d = new java.util.Date();
727	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
728	<	lock.releaseExclusive(1);
484	<	}
485	<	catch (Exception ex) {
486	<	unexpectedException();
487	<	}
725	>	sync2.hasWaiters(c);
726	>	shouldThrow();
727	>	} catch (IllegalArgumentException success) {}
728	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
729		}
730
731		/**
732	<	* await returns when signalled
732	>	* hasWaiters throws IllegalMonitorStateException if not synced
733		*/
734	<	public void testAwait() {
735	<	final Mutex lock = new Mutex();
736	<	final Condition c = lock.newCondition();
737	<	Thread t = new Thread(new Runnable() {
738	<	public void run() {
739	<	try {
740	<	lock.acquireExclusiveUninterruptibly(1);
741	<	c.await();
742	<	lock.releaseExclusive(1);
502	<	}
503	<	catch(InterruptedException e) {
504	<	threadUnexpectedException();
505	<	}
506	<	}
507	<	});
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	<	t.start();
753	<	Thread.sleep(SHORT_DELAY_MS);
754	<	lock.acquireExclusiveUninterruptibly(1);
755	<	c.signal();
514	<	lock.releaseExclusive(1);
515	<	t.join(SHORT_DELAY_MS);
516	<	assertFalse(t.isAlive());
517	<	}
518	<	catch (Exception ex) {
519	<	unexpectedException();
520	<	}
752	>	sync2.getWaitQueueLength(c);
753	>	shouldThrow();
754	>	} catch (IllegalArgumentException success) {}
755	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
756		}
757
758		/**
759	<	* toString indicates current state
759	>	* getWaitQueueLength throws IllegalMonitorStateException if not synced
760		*/
761	<	public void testToString() {
762	<	Mutex lock = new Mutex();
763	<	String us = lock.toString();
764	<	assertTrue(us.indexOf("State = 0") >= 0);
765	<	lock.acquireExclusiveUninterruptibly(1);
766	<	String ls = lock.toString();
767	<	assertTrue(ls.indexOf("State = 1") >= 0);
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	<	* A serialized AQS deserializes with current state
772	>	* getWaitingThreads throws IllegalArgumentException if not owned
773		*/
774	<	public void testSerialization() {
775	<	Mutex l = new Mutex();
776	<	l.acquireExclusiveUninterruptibly(1);
777	<	assertTrue(l.isLocked());
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	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
793	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
794	<	out.writeObject(l);
795	<	out.close();
792	>	sync.getWaitingThreads(c);
793	>	shouldThrow();
794	>	} catch (IllegalMonitorStateException success) {}
795	>	assertHasWaitersUnlocked(sync, c, NO_THREADS);
796	>	}
797
798	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
799	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
800	<	Mutex r = (Mutex) in.readObject();
801	<	assertTrue(r.isLocked());
802	<	} catch(Exception e){
803	<	e.printStackTrace();
804	<	unexpectedException();
805	<	}
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	<	* Latch isSignalled initially returns false, then true after release
1082	>	* tryReleaseShared setting state changes getState
1083		*/
1084	<	public void testLatchIsSignalled() {
1085	<	final BooleanLatch l = new BooleanLatch();
1086	<	assertFalse(l.isSignalled());
1087	<	l.releaseShared(0);
1088	<	assertTrue(l.isSignalled());
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	<	* release and has no effect when already signalled
1092	>	* releaseShared has no effect when already signalled
1093		*/
1094		public void testReleaseShared() {
1095	<	final BooleanLatch l = new BooleanLatch();
1096	<	assertFalse(l.isSignalled());
1097	<	l.releaseShared(0);
1098	<	assertTrue(l.isSignalled());
1099	<	l.releaseShared(0);
1100	<	assertTrue(l.isSignalled());
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();
1107	>	final BooleanLatch l = new BooleanLatch();
1108
1109	<	Thread t = new Thread(new Runnable() {
1110	<	public void run() {
1111	<	try {
1112	<	threadAssertFalse(l.isSignalled());
1113	<	l.acquireSharedInterruptibly(0);
1114	<	threadAssertTrue(l.isSignalled());
1115	<	} catch(InterruptedException e){
1116	<	threadUnexpectedException();
1117	<	}
1118	<	}
1119	<	});
1120	<	try {
1121	<	t.start();
1122	<	assertFalse(l.isSignalled());
1123	<	Thread.sleep(SHORT_DELAY_MS);
1124	<	l.releaseShared(0);
604	<	assertTrue(l.isSignalled());
605	<	t.join();
606	<	} catch (InterruptedException e){
607	<	unexpectedException();
608	<	}
609	<	}
610	<
611	<
612	<	/**
613	<	* acquireSharedTimed returns after release
614	<	*/
615	<	public void testAsquireSharedTimed() {
616	<	final BooleanLatch l = new BooleanLatch();
617	<
618	<	Thread t = new Thread(new Runnable() {
619	<	public void run() {
620	<	try {
621	<	threadAssertFalse(l.isSignalled());
622	<	threadAssertTrue(l.acquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000));
623	<	threadAssertTrue(l.isSignalled());
624	<
625	<	} catch(InterruptedException e){
626	<	threadUnexpectedException();
627	<	}
628	<	}
629	<	});
630	<	try {
631	<	t.start();
632	<	assertFalse(l.isSignalled());
633	<	Thread.sleep(SHORT_DELAY_MS);
634	<	l.releaseShared(0);
635	<	assertTrue(l.isSignalled());
636	<	t.join();
637	<	} catch (InterruptedException e){
638	<	unexpectedException();
639	<	}
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	<
1126	>
1127		/**
1128	<	* acquireSharedInterruptibly throws IE if interrupted before released
1128	>	* tryAcquireSharedNanos returns after release, but not before
1129		*/
1130	<	public void testAcquireSharedInterruptibly_InterruptedException() {
1130	>	public void testTryAcquireSharedNanos() {
1131		final BooleanLatch l = new BooleanLatch();
1132	<	Thread t = new Thread(new Runnable() {
1133	<	public void run() {
1134	<	try {
1135	<	threadAssertFalse(l.isSignalled());
1136	<	l.acquireSharedInterruptibly(0);
1137	<	threadShouldThrow();
1138	<	} catch(InterruptedException success){}
1139	<	}
1140	<	});
1141	<	t.start();
1142	<	try {
1143	<	assertFalse(l.isSignalled());
1144	<	t.interrupt();
1145	<	t.join();
1146	<	} catch (InterruptedException e){
1147	<	unexpectedException();
1148	<	}
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	<	* acquireSharedTimed throws IE if interrupted before released
1152	>	* acquireSharedInterruptibly is interruptible
1153		*/
1154	<	public void testAcquireSharedNanos_InterruptedException() {
1154	>	public void testAcquireSharedInterruptibly_Interruptible() {
1155		final BooleanLatch l = new BooleanLatch();
1156	<	Thread t = new Thread(new Runnable() {
1157	<	public void run() {
1158	<	try {
1159	<	threadAssertFalse(l.isSignalled());
1160	<	l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000);
1161	<	threadShouldThrow();
1162	<	} catch(InterruptedException success){}
1163	<	}
1164	<	});
1165	<	t.start();
1166	<	try {
682	<	Thread.sleep(SHORT_DELAY_MS);
683	<	assertFalse(l.isSignalled());
684	<	t.interrupt();
685	<	t.join();
686	<	} catch (InterruptedException e){
687	<	unexpectedException();
688	<	}
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	<	* acquireSharedTimed times out if not released before timeout
1170	>	* tryAcquireSharedNanos is interruptible
1171		*/
1172	<	public void testAcquireSharedNanos_Timeout() {
1172	>	public void testTryAcquireSharedNanos_Interruptible() {
1173		final BooleanLatch l = new BooleanLatch();
1174	<	Thread t = new Thread(new Runnable() {
1175	<	public void run() {
1176	<	try {
1177	<	threadAssertFalse(l.isSignalled());
1178	<	threadAssertFalse(l.acquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000));
1179	<	} catch(InterruptedException ie){
1180	<	threadUnexpectedException();
1181	<	}
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	>	final BooleanLatch observedQueued = new BooleanLatch();
1194	>	final long timeoutMillis = timeoutMillis();
1195	>	Thread t = newStartedThread(new CheckedRunnable() {
1196	>	public void realRun() throws InterruptedException {
1197	>	assertFalse(l.isSignalled());
1198	>	for (long millis = timeoutMillis();
1199	>	!observedQueued.isSignalled();
1200	>	millis *= 2) {
1201	>	long nanos = MILLISECONDS.toNanos(millis);
1202	>	long startTime = System.nanoTime();
1203	>	assertFalse(l.tryAcquireSharedNanos(0, nanos));
1204	>	assertTrue(millisElapsedSince(startTime) >= millis);
1205		}
1206	<	});
1207	<	t.start();
1208	<	try {
1209	<	Thread.sleep(SHORT_DELAY_MS);
1210	<	assertFalse(l.isSignalled());
1211	<	t.join();
1212	<	} catch (InterruptedException e){
1213	<	unexpectedException();
713	<	}
1206	>	assertFalse(l.isSignalled());
1207	>	}});
1208	>
1209	>	waitForQueuedThread(l, t);
1210	>	observedQueued.releaseShared(0);
1211	>	assertFalse(l.isSignalled());
1212	>	awaitTermination(t);
1213	>	assertFalse(l.isSignalled());
1214		}
1215
716	–
1216		}

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