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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.15 by dl, Mon Dec 29 19:05:40 2003 UTC vs.
Revision 1.52 by jsr166, Thu May 30 03:28:55 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		import junit.framework.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
10	>	import java.util.concurrent.locks.Condition;
11	>	import java.util.concurrent.locks.ReentrantLock;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.CyclicBarrier;
14	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
15		import java.util.*;
13	–	import java.io.*;
16
17		public class ReentrantLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantLockTest.class);
22	>	return new TestSuite(ReentrantLockTest.class);
23		}
24
25		/**
26		* A runnable calling lockInterruptibly
27		*/
28	<	class InterruptibleLockRunnable implements Runnable {
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29		final ReentrantLock lock;
30		InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
31	<	public void run() {
32	<	try {
31	<	lock.lockInterruptibly();
32	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.lockInterruptibly();
33		}
34		}
35
36	–
36		/**
37		* A runnable calling lockInterruptibly that expects to be
38		* interrupted
39		*/
40	<	class InterruptedLockRunnable implements Runnable {
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantLock lock;
42		InterruptedLockRunnable(ReentrantLock l) { lock = l; }
43	<	public void run() {
44	<	try {
46	<	lock.lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.lockInterruptibly();
45		}
46		}
47
#	Line 54 | Line 50 | public class ReentrantLockTest extends J
50		*/
51		static class PublicReentrantLock extends ReentrantLock {
52		PublicReentrantLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
53	>	PublicReentrantLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56	>	}
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59		}
60	<	public Collection<Thread> getWaitingThreads(Condition c) {
61	<	return super.getWaitingThreads(c);
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62		}
63	+	}
64
65	+	/**
66	+	* Releases write lock, checking that it had a hold count of 1.
67	+	*/
68	+	void releaseLock(PublicReentrantLock lock) {
69	+	assertLockedByMoi(lock);
70	+	lock.unlock();
71	+	assertFalse(lock.isHeldByCurrentThread());
72	+	assertNotLocked(lock);
73	+	}
74
75	+	/**
76	+	* Spin-waits until lock.hasQueuedThread(t) becomes true.
77	+	*/
78	+	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
79	+	long startTime = System.nanoTime();
80	+	while (!lock.hasQueuedThread(t)) {
81	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
82	+	throw new AssertionFailedError("timed out");
83	+	Thread.yield();
84	+	}
85	+	assertTrue(t.isAlive());
86	+	assertNotSame(t, lock.getOwner());
87		}
88
89		/**
90	<	* Constructor sets given fairness
90	>	* Checks that lock is not locked.
91		*/
92	<	public void testConstructor() {
93	<	ReentrantLock rl = new ReentrantLock();
94	<	assertFalse(rl.isFair());
95	<	ReentrantLock r2 = new ReentrantLock(true);
96	<	assertTrue(r2.isFair());
92	>	void assertNotLocked(PublicReentrantLock lock) {
93	>	assertFalse(lock.isLocked());
94	>	assertFalse(lock.isHeldByCurrentThread());
95	>	assertNull(lock.getOwner());
96	>	assertEquals(0, lock.getHoldCount());
97		}
98
99		/**
100	<	* locking an unlocked lock succeeds
100	>	* Checks that lock is locked by the given thread.
101		*/
102	<	public void testLock() {
103	<	ReentrantLock rl = new ReentrantLock();
104	<	rl.lock();
105	<	assertTrue(rl.isLocked());
106	<	rl.unlock();
102	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
103	>	assertTrue(lock.isLocked());
104	>	assertSame(t, lock.getOwner());
105	>	assertEquals(t == Thread.currentThread(),
106	>	lock.isHeldByCurrentThread());
107	>	assertEquals(t == Thread.currentThread(),
108	>	lock.getHoldCount() > 0);
109		}
110
111		/**
112	<	* locking an unlocked fair lock succeeds
112	>	* Checks that lock is locked by the current thread.
113		*/
114	<	public void testFairLock() {
115	<	ReentrantLock rl = new ReentrantLock(true);
92	<	rl.lock();
93	<	assertTrue(rl.isLocked());
94	<	rl.unlock();
114	>	void assertLockedByMoi(PublicReentrantLock lock) {
115	>	assertLockedBy(lock, Thread.currentThread());
116		}
117
118		/**
119	<	* Unlocking an unlocked lock throws IllegalMonitorStateException
119	>	* Checks that condition c has no waiters.
120		*/
121	<	public void testUnlock_IllegalMonitorStateException() {
122	<	ReentrantLock rl = new ReentrantLock();
123	<	try {
103	<	rl.unlock();
104	<	shouldThrow();
121	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
122	>	assertHasWaiters(lock, c, new Thread[] {});
123	>	}
124
125	<	} catch(IllegalMonitorStateException success){}
125	>	/**
126	>	* Checks that condition c has exactly the given waiter threads.
127	>	*/
128	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
129	>	Thread... threads) {
130	>	lock.lock();
131	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
132	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
133	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
134	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
135	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
136	>	new HashSet<Thread>(Arrays.asList(threads)));
137	>	lock.unlock();
138		}
139
140	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
141	+
142		/**
143	<	* tryLock on an unlocked lock succeeds
143	>	* Awaits condition using the specified AwaitMethod.
144		*/
145	<	public void testTryLock() {
146	<	ReentrantLock rl = new ReentrantLock();
147	<	assertTrue(rl.tryLock());
148	<	assertTrue(rl.isLocked());
149	<	rl.unlock();
145	>	void await(Condition c, AwaitMethod awaitMethod)
146	>	throws InterruptedException {
147	>	long timeoutMillis = 2 * LONG_DELAY_MS;
148	>	switch (awaitMethod) {
149	>	case await:
150	>	c.await();
151	>	break;
152	>	case awaitTimed:
153	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
154	>	break;
155	>	case awaitNanos:
156	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
157	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
158	>	assertTrue(nanosRemaining > 0);
159	>	break;
160	>	case awaitUntil:
161	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
162	>	break;
163	>	}
164		}
165
166	+	/**
167	+	* Constructor sets given fairness, and is in unlocked state
168	+	*/
169	+	public void testConstructor() {
170	+	PublicReentrantLock lock;
171	+
172	+	lock = new PublicReentrantLock();
173	+	assertFalse(lock.isFair());
174	+	assertNotLocked(lock);
175	+
176	+	lock = new PublicReentrantLock(true);
177	+	assertTrue(lock.isFair());
178	+	assertNotLocked(lock);
179	+
180	+	lock = new PublicReentrantLock(false);
181	+	assertFalse(lock.isFair());
182	+	assertNotLocked(lock);
183	+	}
184	+
185	+	/**
186	+	* locking an unlocked lock succeeds
187	+	*/
188	+	public void testLock()      { testLock(false); }
189	+	public void testLock_fair() { testLock(true); }
190	+	public void testLock(boolean fair) {
191	+	PublicReentrantLock lock = new PublicReentrantLock(fair);
192	+	lock.lock();
193	+	assertLockedByMoi(lock);
194	+	releaseLock(lock);
195	+	}
196	+
197	+	/**
198	+	* Unlocking an unlocked lock throws IllegalMonitorStateException
199	+	*/
200	+	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
201	+	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
202	+	public void testUnlock_IMSE(boolean fair) {
203	+	ReentrantLock lock = new ReentrantLock(fair);
204	+	try {
205	+	lock.unlock();
206	+	shouldThrow();
207	+	} catch (IllegalMonitorStateException success) {}
208	+	}
209	+
210	+	/**
211	+	* tryLock on an unlocked lock succeeds
212	+	*/
213	+	public void testTryLock()      { testTryLock(false); }
214	+	public void testTryLock_fair() { testTryLock(true); }
215	+	public void testTryLock(boolean fair) {
216	+	PublicReentrantLock lock = new PublicReentrantLock(fair);
217	+	assertTrue(lock.tryLock());
218	+	assertLockedByMoi(lock);
219	+	assertTrue(lock.tryLock());
220	+	assertLockedByMoi(lock);
221	+	lock.unlock();
222	+	releaseLock(lock);
223	+	}
224
225		/**
226		* hasQueuedThreads reports whether there are waiting threads
227		*/
228	<	public void testhasQueuedThreads() {
229	<	final ReentrantLock lock = new ReentrantLock();
228	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
229	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
230	>	public void testHasQueuedThreads(boolean fair) {
231	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
232		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
233		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
234	<	try {
235	<	assertFalse(lock.hasQueuedThreads());
236	<	lock.lock();
237	<	t1.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
239	<	assertTrue(lock.hasQueuedThreads());
240	<	t2.start();
241	<	Thread.sleep(SHORT_DELAY_MS);
242	<	assertTrue(lock.hasQueuedThreads());
243	<	t1.interrupt();
244	<	Thread.sleep(SHORT_DELAY_MS);
245	<	assertTrue(lock.hasQueuedThreads());
246	<	lock.unlock();
247	<	Thread.sleep(SHORT_DELAY_MS);
248	<	assertFalse(lock.hasQueuedThreads());
249	<	t1.join();
143	<	t2.join();
144	<	} catch(Exception e){
145	<	unexpectedException();
146	<	}
147	<	}
234	>	assertFalse(lock.hasQueuedThreads());
235	>	lock.lock();
236	>	assertFalse(lock.hasQueuedThreads());
237	>	t1.start();
238	>	waitForQueuedThread(lock, t1);
239	>	assertTrue(lock.hasQueuedThreads());
240	>	t2.start();
241	>	waitForQueuedThread(lock, t2);
242	>	assertTrue(lock.hasQueuedThreads());
243	>	t1.interrupt();
244	>	awaitTermination(t1);
245	>	assertTrue(lock.hasQueuedThreads());
246	>	lock.unlock();
247	>	awaitTermination(t2);
248	>	assertFalse(lock.hasQueuedThreads());
249	>	}
250
251		/**
252		* getQueueLength reports number of waiting threads
253		*/
254	<	public void testGetQueueLength() {
255	<	final ReentrantLock lock = new ReentrantLock();
254	>	public void testGetQueueLength()      { testGetQueueLength(false); }
255	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
256	>	public void testGetQueueLength(boolean fair) {
257	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
258		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
259		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
260	+	assertEquals(0, lock.getQueueLength());
261	+	lock.lock();
262	+	t1.start();
263	+	waitForQueuedThread(lock, t1);
264	+	assertEquals(1, lock.getQueueLength());
265	+	t2.start();
266	+	waitForQueuedThread(lock, t2);
267	+	assertEquals(2, lock.getQueueLength());
268	+	t1.interrupt();
269	+	awaitTermination(t1);
270	+	assertEquals(1, lock.getQueueLength());
271	+	lock.unlock();
272	+	awaitTermination(t2);
273	+	assertEquals(0, lock.getQueueLength());
274	+	}
275	+
276	+	/**
277	+	* hasQueuedThread(null) throws NPE
278	+	*/
279	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
280	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
281	+	public void testHasQueuedThreadNPE(boolean fair) {
282	+	final ReentrantLock lock = new ReentrantLock(fair);
283		try {
284	<	assertEquals(0, lock.getQueueLength());
285	<	lock.lock();
286	<	t1.start();
287	<	Thread.sleep(SHORT_DELAY_MS);
161	<	assertEquals(1, lock.getQueueLength());
162	<	t2.start();
163	<	Thread.sleep(SHORT_DELAY_MS);
164	<	assertEquals(2, lock.getQueueLength());
165	<	t1.interrupt();
166	<	Thread.sleep(SHORT_DELAY_MS);
167	<	assertEquals(1, lock.getQueueLength());
168	<	lock.unlock();
169	<	Thread.sleep(SHORT_DELAY_MS);
170	<	assertEquals(0, lock.getQueueLength());
171	<	t1.join();
172	<	t2.join();
173	<	} catch(Exception e){
174	<	unexpectedException();
175	<	}
176	<	}
284	>	lock.hasQueuedThread(null);
285	>	shouldThrow();
286	>	} catch (NullPointerException success) {}
287	>	}
288
289		/**
290	<	* getQueuedThreads includes waiting threads
290	>	* hasQueuedThread reports whether a thread is queued
291		*/
292	<	public void testGetQueuedThreads() {
293	<	final PublicReentrantLock lock = new PublicReentrantLock();
292	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
293	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
294	>	public void testHasQueuedThread(boolean fair) {
295	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
296		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
297		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
298	<	try {
299	<	assertTrue(lock.getQueuedThreads().isEmpty());
300	<	lock.lock();
301	<	assertTrue(lock.getQueuedThreads().isEmpty());
302	<	t1.start();
303	<	Thread.sleep(SHORT_DELAY_MS);
304	<	assertTrue(lock.getQueuedThreads().contains(t1));
305	<	t2.start();
306	<	Thread.sleep(SHORT_DELAY_MS);
307	<	assertTrue(lock.getQueuedThreads().contains(t1));
308	<	assertTrue(lock.getQueuedThreads().contains(t2));
309	<	t1.interrupt();
310	<	Thread.sleep(SHORT_DELAY_MS);
311	<	assertFalse(lock.getQueuedThreads().contains(t1));
312	<	assertTrue(lock.getQueuedThreads().contains(t2));
313	<	lock.unlock();
314	<	Thread.sleep(SHORT_DELAY_MS);
315	<	assertTrue(lock.getQueuedThreads().isEmpty());
316	<	t1.join();
317	<	t2.join();
205	<	} catch(Exception e){
206	<	unexpectedException();
207	<	}
208	<	}
209	<
298	>	assertFalse(lock.hasQueuedThread(t1));
299	>	assertFalse(lock.hasQueuedThread(t2));
300	>	lock.lock();
301	>	t1.start();
302	>	waitForQueuedThread(lock, t1);
303	>	assertTrue(lock.hasQueuedThread(t1));
304	>	assertFalse(lock.hasQueuedThread(t2));
305	>	t2.start();
306	>	waitForQueuedThread(lock, t2);
307	>	assertTrue(lock.hasQueuedThread(t1));
308	>	assertTrue(lock.hasQueuedThread(t2));
309	>	t1.interrupt();
310	>	awaitTermination(t1);
311	>	assertFalse(lock.hasQueuedThread(t1));
312	>	assertTrue(lock.hasQueuedThread(t2));
313	>	lock.unlock();
314	>	awaitTermination(t2);
315	>	assertFalse(lock.hasQueuedThread(t1));
316	>	assertFalse(lock.hasQueuedThread(t2));
317	>	}
318
319		/**
320	<	* timed tryLock is interruptible.
320	>	* getQueuedThreads includes waiting threads
321		*/
322	<	public void testInterruptedException2() {
323	<	final ReentrantLock lock = new ReentrantLock();
324	<	lock.lock();
325	<	Thread t = new Thread(new Runnable() {
326	<	public void run() {
327	<	try {
328	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
329	<	threadShouldThrow();
330	<	} catch(InterruptedException success){}
331	<	}
332	<	});
333	<	try {
334	<	t.start();
335	<	t.interrupt();
336	<	} catch(Exception e){
337	<	unexpectedException();
338	<	}
322	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
323	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
324	>	public void testGetQueuedThreads(boolean fair) {
325	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
326	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
327	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
328	>	assertTrue(lock.getQueuedThreads().isEmpty());
329	>	lock.lock();
330	>	assertTrue(lock.getQueuedThreads().isEmpty());
331	>	t1.start();
332	>	waitForQueuedThread(lock, t1);
333	>	assertEquals(1, lock.getQueuedThreads().size());
334	>	assertTrue(lock.getQueuedThreads().contains(t1));
335	>	t2.start();
336	>	waitForQueuedThread(lock, t2);
337	>	assertEquals(2, lock.getQueuedThreads().size());
338	>	assertTrue(lock.getQueuedThreads().contains(t1));
339	>	assertTrue(lock.getQueuedThreads().contains(t2));
340	>	t1.interrupt();
341	>	awaitTermination(t1);
342	>	assertFalse(lock.getQueuedThreads().contains(t1));
343	>	assertTrue(lock.getQueuedThreads().contains(t2));
344	>	assertEquals(1, lock.getQueuedThreads().size());
345	>	lock.unlock();
346	>	awaitTermination(t2);
347	>	assertTrue(lock.getQueuedThreads().isEmpty());
348		}
349
350	+	/**
351	+	* timed tryLock is interruptible
352	+	*/
353	+	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
354	+	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
355	+	public void testTryLock_Interruptible(boolean fair) {
356	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
357	+	lock.lock();
358	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
359	+	public void realRun() throws InterruptedException {
360	+	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
361	+	}});
362	+
363	+	waitForQueuedThread(lock, t);
364	+	t.interrupt();
365	+	awaitTermination(t);
366	+	releaseLock(lock);
367	+	}
368
369		/**
370	<	* TryLock on a locked lock fails
371	<	*/
372	<	public void testTryLockWhenLocked() {
373	<	final ReentrantLock lock = new ReentrantLock();
374	<	lock.lock();
375	<	Thread t = new Thread(new Runnable() {
376	<	public void run() {
377	<	threadAssertFalse(lock.tryLock());
378	<	}
379	<	});
380	<	try {
381	<	t.start();
382	<	t.join();
383	<	lock.unlock();
384	<	} catch(Exception e){
250	<	unexpectedException();
251	<	}
252	<	}
370	>	* tryLock on a locked lock fails
371	>	*/
372	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
373	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
374	>	public void testTryLockWhenLocked(boolean fair) {
375	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
376	>	lock.lock();
377	>	Thread t = newStartedThread(new CheckedRunnable() {
378	>	public void realRun() {
379	>	assertFalse(lock.tryLock());
380	>	}});
381	>
382	>	awaitTermination(t);
383	>	releaseLock(lock);
384	>	}
385
386		/**
387		* Timed tryLock on a locked lock times out
388		*/
389	<	public void testTryLock_Timeout() {
390	<	final ReentrantLock lock = new ReentrantLock();
391	<	lock.lock();
392	<	Thread t = new Thread(new Runnable() {
393	<	public void run() {
394	<	try {
395	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
396	<	} catch (Exception ex) {
397	<	threadUnexpectedException();
398	<	}
399	<	}
400	<	});
401	<	try {
402	<	t.start();
403	<	t.join();
272	<	lock.unlock();
273	<	} catch(Exception e){
274	<	unexpectedException();
275	<	}
276	<	}
277	<
278	<	/**
279	<	* getHoldCount returns number of recursive holds
280	<	*/
281	<	public void testGetHoldCount() {
282	<	ReentrantLock lock = new ReentrantLock();
283	<	for(int i = 1; i <= SIZE; i++) {
284	<	lock.lock();
285	<	assertEquals(i,lock.getHoldCount());
286	<	}
287	<	for(int i = SIZE; i > 0; i--) {
288	<	lock.unlock();
289	<	assertEquals(i-1,lock.getHoldCount());
290	<	}
389	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
390	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
391	>	public void testTryLock_Timeout(boolean fair) {
392	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
393	>	lock.lock();
394	>	Thread t = newStartedThread(new CheckedRunnable() {
395	>	public void realRun() throws InterruptedException {
396	>	long startTime = System.nanoTime();
397	>	long timeoutMillis = 10;
398	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
399	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
400	>	}});
401	>
402	>	awaitTermination(t);
403	>	releaseLock(lock);
404		}
405	<
293	<
405	>
406		/**
407	<	* isLocked is true when locked and false when not
407	>	* getHoldCount returns number of recursive holds
408		*/
409	<	public void testIsLocked() {
410	<	final ReentrantLock lock = new ReentrantLock();
411	<	lock.lock();
412	<	assertTrue(lock.isLocked());
413	<	lock.unlock();
414	<	assertFalse(lock.isLocked());
415	<	Thread t = new Thread(new Runnable() {
416	<	public void run() {
417	<	lock.lock();
418	<	try {
419	<	Thread.sleep(SMALL_DELAY_MS);
308	<	}
309	<	catch(Exception e) {
310	<	threadUnexpectedException();
311	<	}
312	<	lock.unlock();
313	<	}
314	<	});
315	<	try {
316	<	t.start();
317	<	Thread.sleep(SHORT_DELAY_MS);
318	<	assertTrue(lock.isLocked());
319	<	t.join();
320	<	assertFalse(lock.isLocked());
321	<	} catch(Exception e){
322	<	unexpectedException();
409	>	public void testGetHoldCount()      { testGetHoldCount(false); }
410	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
411	>	public void testGetHoldCount(boolean fair) {
412	>	ReentrantLock lock = new ReentrantLock(fair);
413	>	for (int i = 1; i <= SIZE; i++) {
414	>	lock.lock();
415	>	assertEquals(i, lock.getHoldCount());
416	>	}
417	>	for (int i = SIZE; i > 0; i--) {
418	>	lock.unlock();
419	>	assertEquals(i-1, lock.getHoldCount());
420		}
421		}
422
326	–
423		/**
424	<	* lockInterruptibly is interruptible.
424	>	* isLocked is true when locked and false when not
425		*/
426	<	public void testLockInterruptibly1() {
427	<	final ReentrantLock lock = new ReentrantLock();
428	<	lock.lock();
333	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
426	>	public void testIsLocked()      { testIsLocked(false); }
427	>	public void testIsLocked_fair() { testIsLocked(true); }
428	>	public void testIsLocked(boolean fair) {
429		try {
430	<	t.start();
431	<	t.interrupt();
430	>	final ReentrantLock lock = new ReentrantLock(fair);
431	>	assertFalse(lock.isLocked());
432	>	lock.lock();
433	>	assertTrue(lock.isLocked());
434	>	lock.lock();
435	>	assertTrue(lock.isLocked());
436	>	lock.unlock();
437	>	assertTrue(lock.isLocked());
438		lock.unlock();
439	<	t.join();
440	<	} catch(Exception e){
441	<	unexpectedException();
439	>	assertFalse(lock.isLocked());
440	>	final CyclicBarrier barrier = new CyclicBarrier(2);
441	>	Thread t = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() throws Exception {
443	>	lock.lock();
444	>	assertTrue(lock.isLocked());
445	>	barrier.await();
446	>	barrier.await();
447	>	lock.unlock();
448	>	}});
449	>
450	>	barrier.await();
451	>	assertTrue(lock.isLocked());
452	>	barrier.await();
453	>	awaitTermination(t);
454	>	assertFalse(lock.isLocked());
455	>	} catch (Exception e) {
456	>	threadUnexpectedException(e);
457		}
458	<	}
458	>	}
459
460		/**
461		* lockInterruptibly succeeds when unlocked, else is interruptible
462		*/
463	<	public void testLockInterruptibly2() {
464	<	final ReentrantLock lock = new ReentrantLock();
465	<	try {
466	<	lock.lockInterruptibly();
351	<	} catch(Exception e) {
352	<	unexpectedException();
353	<	}
354	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
463	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
464	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
465	>	public void testLockInterruptibly(boolean fair) {
466	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
467		try {
468	<	t.start();
469	<	t.interrupt();
470	<	assertTrue(lock.isLocked());
359	<	assertTrue(lock.isHeldByCurrentThread());
360	<	t.join();
361	<	} catch(Exception e){
362	<	unexpectedException();
468	>	lock.lockInterruptibly();
469	>	} catch (InterruptedException ie) {
470	>	threadUnexpectedException(ie);
471		}
472	+	assertLockedByMoi(lock);
473	+	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
474	+	waitForQueuedThread(lock, t);
475	+	t.interrupt();
476	+	assertTrue(lock.isLocked());
477	+	assertTrue(lock.isHeldByCurrentThread());
478	+	awaitTermination(t);
479	+	releaseLock(lock);
480		}
481
482		/**
483		* Calling await without holding lock throws IllegalMonitorStateException
484		*/
485	<	public void testAwait_IllegalMonitor() {
486	<	final ReentrantLock lock = new ReentrantLock();
485	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
486	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
487	>	public void testAwait_IMSE(boolean fair) {
488	>	final ReentrantLock lock = new ReentrantLock(fair);
489		final Condition c = lock.newCondition();
490	<	try {
491	<	c.await();
492	<	shouldThrow();
493	<	}
494	<	catch (IllegalMonitorStateException success) {
495	<	}
496	<	catch (Exception ex) {
497	<	unexpectedException();
490	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
491	>	long startTime = System.nanoTime();
492	>	try {
493	>	await(c, awaitMethod);
494	>	shouldThrow();
495	>	} catch (IllegalMonitorStateException success) {
496	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
497	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
498		}
499		}
500
501		/**
502		* Calling signal without holding lock throws IllegalMonitorStateException
503		*/
504	<	public void testSignal_IllegalMonitor() {
505	<	final ReentrantLock lock = new ReentrantLock();
504	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
505	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
506	>	public void testSignal_IMSE(boolean fair) {
507	>	final ReentrantLock lock = new ReentrantLock(fair);
508		final Condition c = lock.newCondition();
509		try {
510		c.signal();
511		shouldThrow();
512	<	}
393	<	catch (IllegalMonitorStateException success) {
394	<	}
395	<	catch (Exception ex) {
396	<	unexpectedException();
397	<	}
512	>	} catch (IllegalMonitorStateException success) {}
513		}
514
515		/**
516		* awaitNanos without a signal times out
517		*/
518	<	public void testAwaitNanos_Timeout() {
519	<	final ReentrantLock lock = new ReentrantLock();
520	<	final Condition c = lock.newCondition();
518	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
519	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
520	>	public void testAwaitNanos_Timeout(boolean fair) {
521		try {
522	+	final ReentrantLock lock = new ReentrantLock(fair);
523	+	final Condition c = lock.newCondition();
524		lock.lock();
525	<	long t = c.awaitNanos(100);
526	<	assertTrue(t <= 0);
525	>	long startTime = System.nanoTime();
526	>	long timeoutMillis = 10;
527	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
528	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
529	>	assertTrue(nanosRemaining <= 0);
530	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
531		lock.unlock();
532	<	}
533	<	catch (Exception ex) {
413	<	unexpectedException();
532	>	} catch (InterruptedException e) {
533	>	threadUnexpectedException(e);
534		}
535		}
536
537		/**
538	<	*  timed await without a signal times out
538	>	* timed await without a signal times out
539		*/
540	<	public void testAwait_Timeout() {
541	<	final ReentrantLock lock = new ReentrantLock();
542	<	final Condition c = lock.newCondition();
540	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
541	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
542	>	public void testAwait_Timeout(boolean fair) {
543		try {
544	+	final ReentrantLock lock = new ReentrantLock(fair);
545	+	final Condition c = lock.newCondition();
546		lock.lock();
547	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
547	>	long startTime = System.nanoTime();
548	>	long timeoutMillis = 10;
549	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
550	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
551		lock.unlock();
552	<	}
553	<	catch (Exception ex) {
429	<	unexpectedException();
552	>	} catch (InterruptedException e) {
553	>	threadUnexpectedException(e);
554		}
555		}
556
557		/**
558		* awaitUntil without a signal times out
559		*/
560	<	public void testAwaitUntil_Timeout() {
561	<	final ReentrantLock lock = new ReentrantLock();
562	<	final Condition c = lock.newCondition();
560	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
561	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
562	>	public void testAwaitUntil_Timeout(boolean fair) {
563		try {
564	+	final ReentrantLock lock = new ReentrantLock(fair);
565	+	final Condition c = lock.newCondition();
566		lock.lock();
567	+	long startTime = System.nanoTime();
568	+	long timeoutMillis = 10;
569		java.util.Date d = new java.util.Date();
570	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
570	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
571	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
572		lock.unlock();
573	<	}
574	<	catch (Exception ex) {
446	<	unexpectedException();
573	>	} catch (InterruptedException e) {
574	>	threadUnexpectedException(e);
575		}
576		}
577
578		/**
579		* await returns when signalled
580		*/
581	<	public void testAwait() {
582	<	final ReentrantLock lock = new ReentrantLock();
581	>	public void testAwait()      { testAwait(false); }
582	>	public void testAwait_fair() { testAwait(true); }
583	>	public void testAwait(boolean fair) {
584	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
585		final Condition c = lock.newCondition();
586	<	Thread t = new Thread(new Runnable() {
587	<	public void run() {
588	<	try {
589	<	lock.lock();
590	<	c.await();
591	<	lock.unlock();
592	<	}
593	<	catch(InterruptedException e) {
594	<	threadUnexpectedException();
595	<	}
596	<	}
597	<	});
598	<
599	<	try {
600	<	t.start();
601	<	Thread.sleep(SHORT_DELAY_MS);
602	<	lock.lock();
473	<	c.signal();
474	<	lock.unlock();
475	<	t.join(SHORT_DELAY_MS);
476	<	assertFalse(t.isAlive());
477	<	}
478	<	catch (Exception ex) {
479	<	unexpectedException();
480	<	}
586	>	final CountDownLatch locked = new CountDownLatch(1);
587	>	Thread t = newStartedThread(new CheckedRunnable() {
588	>	public void realRun() throws InterruptedException {
589	>	lock.lock();
590	>	locked.countDown();
591	>	c.await();
592	>	lock.unlock();
593	>	}});
594	>
595	>	await(locked);
596	>	lock.lock();
597	>	assertHasWaiters(lock, c, t);
598	>	c.signal();
599	>	assertHasNoWaiters(lock, c);
600	>	assertTrue(t.isAlive());
601	>	lock.unlock();
602	>	awaitTermination(t);
603		}
604
605		/**
606		* hasWaiters throws NPE if null
607		*/
608	<	public void testHasWaitersNPE() {
609	<	final ReentrantLock lock = new ReentrantLock();
608	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
609	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
610	>	public void testHasWaitersNPE(boolean fair) {
611	>	final ReentrantLock lock = new ReentrantLock(fair);
612		try {
613		lock.hasWaiters(null);
614		shouldThrow();
615	<	} catch (NullPointerException success) {
492	<	} catch (Exception ex) {
493	<	unexpectedException();
494	<	}
615	>	} catch (NullPointerException success) {}
616		}
617
618		/**
619		* getWaitQueueLength throws NPE if null
620		*/
621	<	public void testGetWaitQueueLengthNPE() {
622	<	final ReentrantLock lock = new ReentrantLock();
621	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
622	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
623	>	public void testGetWaitQueueLengthNPE(boolean fair) {
624	>	final ReentrantLock lock = new ReentrantLock(fair);
625		try {
626		lock.getWaitQueueLength(null);
627		shouldThrow();
628	<	} catch (NullPointerException success) {
506	<	} catch (Exception ex) {
507	<	unexpectedException();
508	<	}
628	>	} catch (NullPointerException success) {}
629		}
630
511	–
631		/**
632		* getWaitingThreads throws NPE if null
633		*/
634	<	public void testGetWaitingThreadsNPE() {
635	<	final PublicReentrantLock lock = new PublicReentrantLock();
634	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
635	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
636	>	public void testGetWaitingThreadsNPE(boolean fair) {
637	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
638		try {
639		lock.getWaitingThreads(null);
640		shouldThrow();
641	<	} catch (NullPointerException success) {
521	<	} catch (Exception ex) {
522	<	unexpectedException();
523	<	}
641	>	} catch (NullPointerException success) {}
642		}
643
526	–
644		/**
645	<	* hasWaiters throws IAE if not owned
645	>	* hasWaiters throws IllegalArgumentException if not owned
646		*/
647	<	public void testHasWaitersIAE() {
648	<	final ReentrantLock lock = new ReentrantLock();
649	<	final Condition c = (lock.newCondition());
650	<	final ReentrantLock lock2 = new ReentrantLock();
647	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
648	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
649	>	public void testHasWaitersIAE(boolean fair) {
650	>	final ReentrantLock lock = new ReentrantLock(fair);
651	>	final Condition c = lock.newCondition();
652	>	final ReentrantLock lock2 = new ReentrantLock(fair);
653		try {
654		lock2.hasWaiters(c);
655		shouldThrow();
656	<	} catch (IllegalArgumentException success) {
538	<	} catch (Exception ex) {
539	<	unexpectedException();
540	<	}
656	>	} catch (IllegalArgumentException success) {}
657		}
658
659		/**
660	<	* hasWaiters throws IMSE if not locked
660	>	* hasWaiters throws IllegalMonitorStateException if not locked
661		*/
662	<	public void testHasWaitersIMSE() {
663	<	final ReentrantLock lock = new ReentrantLock();
664	<	final Condition c = (lock.newCondition());
662	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
663	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
664	>	public void testHasWaitersIMSE(boolean fair) {
665	>	final ReentrantLock lock = new ReentrantLock(fair);
666	>	final Condition c = lock.newCondition();
667		try {
668		lock.hasWaiters(c);
669		shouldThrow();
670	<	} catch (IllegalMonitorStateException success) {
553	<	} catch (Exception ex) {
554	<	unexpectedException();
555	<	}
670	>	} catch (IllegalMonitorStateException success) {}
671		}
672
558	–
673		/**
674	<	* getWaitQueueLength throws IAE if not owned
674	>	* getWaitQueueLength throws IllegalArgumentException if not owned
675		*/
676	<	public void testGetWaitQueueLengthIAE() {
677	<	final ReentrantLock lock = new ReentrantLock();
678	<	final Condition c = (lock.newCondition());
679	<	final ReentrantLock lock2 = new ReentrantLock();
676	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
677	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
678	>	public void testGetWaitQueueLengthIAE(boolean fair) {
679	>	final ReentrantLock lock = new ReentrantLock(fair);
680	>	final Condition c = lock.newCondition();
681	>	final ReentrantLock lock2 = new ReentrantLock(fair);
682		try {
683		lock2.getWaitQueueLength(c);
684		shouldThrow();
685	<	} catch (IllegalArgumentException success) {
570	<	} catch (Exception ex) {
571	<	unexpectedException();
572	<	}
685	>	} catch (IllegalArgumentException success) {}
686		}
687
688		/**
689	<	* getWaitQueueLength throws IMSE if not locked
689	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
690		*/
691	<	public void testGetWaitQueueLengthIMSE() {
692	<	final ReentrantLock lock = new ReentrantLock();
693	<	final Condition c = (lock.newCondition());
691	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
692	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
693	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
694	>	final ReentrantLock lock = new ReentrantLock(fair);
695	>	final Condition c = lock.newCondition();
696		try {
697		lock.getWaitQueueLength(c);
698		shouldThrow();
699	<	} catch (IllegalMonitorStateException success) {
585	<	} catch (Exception ex) {
586	<	unexpectedException();
587	<	}
699	>	} catch (IllegalMonitorStateException success) {}
700		}
701
590	–
702		/**
703	<	* getWaitingThreads throws IAE if not owned
703	>	* getWaitingThreads throws IllegalArgumentException if not owned
704		*/
705	<	public void testGetWaitingThreadsIAE() {
706	<	final PublicReentrantLock lock = new PublicReentrantLock();
707	<	final Condition c = (lock.newCondition());
708	<	final PublicReentrantLock lock2 = new PublicReentrantLock();
705	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
706	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
707	>	public void testGetWaitingThreadsIAE(boolean fair) {
708	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
709	>	final Condition c = lock.newCondition();
710	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
711		try {
712		lock2.getWaitingThreads(c);
713		shouldThrow();
714	<	} catch (IllegalArgumentException success) {
602	<	} catch (Exception ex) {
603	<	unexpectedException();
604	<	}
714	>	} catch (IllegalArgumentException success) {}
715		}
716
717		/**
718	<	* getWaitingThreads throws IMSE if not locked
718	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
719		*/
720	<	public void testGetWaitingThreadsIMSE() {
721	<	final PublicReentrantLock lock = new PublicReentrantLock();
722	<	final Condition c = (lock.newCondition());
720	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
721	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
722	>	public void testGetWaitingThreadsIMSE(boolean fair) {
723	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
724	>	final Condition c = lock.newCondition();
725		try {
726		lock.getWaitingThreads(c);
727		shouldThrow();
728	<	} catch (IllegalMonitorStateException success) {
617	<	} catch (Exception ex) {
618	<	unexpectedException();
619	<	}
728	>	} catch (IllegalMonitorStateException success) {}
729		}
730
622	–
623	–
731		/**
732		* hasWaiters returns true when a thread is waiting, else false
733		*/
734	<	public void testHasWaiters() {
735	<	final ReentrantLock lock = new ReentrantLock();
734	>	public void testHasWaiters()      { testHasWaiters(false); }
735	>	public void testHasWaiters_fair() { testHasWaiters(true); }
736	>	public void testHasWaiters(boolean fair) {
737	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
738		final Condition c = lock.newCondition();
739	<	Thread t = new Thread(new Runnable() {
740	<	public void run() {
741	<	try {
742	<	lock.lock();
743	<	threadAssertFalse(lock.hasWaiters(c));
744	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
745	<	c.await();
746	<	lock.unlock();
747	<	}
748	<	catch(InterruptedException e) {
749	<	threadUnexpectedException();
750	<	}
751	<	}
752	<	});
753	<
754	<	try {
755	<	t.start();
756	<	Thread.sleep(SHORT_DELAY_MS);
757	<	lock.lock();
758	<	assertTrue(lock.hasWaiters(c));
759	<	assertEquals(1, lock.getWaitQueueLength(c));
760	<	c.signal();
761	<	lock.unlock();
653	<	Thread.sleep(SHORT_DELAY_MS);
654	<	lock.lock();
655	<	assertFalse(lock.hasWaiters(c));
656	<	assertEquals(0, lock.getWaitQueueLength(c));
657	<	lock.unlock();
658	<	t.join(SHORT_DELAY_MS);
659	<	assertFalse(t.isAlive());
660	<	}
661	<	catch (Exception ex) {
662	<	unexpectedException();
663	<	}
739	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
740	>	Thread t = newStartedThread(new CheckedRunnable() {
741	>	public void realRun() throws InterruptedException {
742	>	lock.lock();
743	>	assertHasNoWaiters(lock, c);
744	>	assertFalse(lock.hasWaiters(c));
745	>	pleaseSignal.countDown();
746	>	c.await();
747	>	assertHasNoWaiters(lock, c);
748	>	assertFalse(lock.hasWaiters(c));
749	>	lock.unlock();
750	>	}});
751	>
752	>	await(pleaseSignal);
753	>	lock.lock();
754	>	assertHasWaiters(lock, c, t);
755	>	assertTrue(lock.hasWaiters(c));
756	>	c.signal();
757	>	assertHasNoWaiters(lock, c);
758	>	assertFalse(lock.hasWaiters(c));
759	>	lock.unlock();
760	>	awaitTermination(t);
761	>	assertHasNoWaiters(lock, c);
762		}
763
764		/**
765		* getWaitQueueLength returns number of waiting threads
766		*/
767	<	public void testGetWaitQueueLength() {
768	<	final ReentrantLock lock = new ReentrantLock();
767	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
768	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
769	>	public void testGetWaitQueueLength(boolean fair) {
770	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
771		final Condition c = lock.newCondition();
772	<	Thread t1 = new Thread(new Runnable() {
773	<	public void run() {
774	<	try {
775	<	lock.lock();
776	<	threadAssertFalse(lock.hasWaiters(c));
777	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
778	<	c.await();
779	<	lock.unlock();
780	<	}
781	<	catch(InterruptedException e) {
782	<	threadUnexpectedException();
783	<	}
784	<	}
785	<	});
786	<
787	<	Thread t2 = new Thread(new Runnable() {
788	<	public void run() {
789	<	try {
790	<	lock.lock();
791	<	threadAssertTrue(lock.hasWaiters(c));
792	<	threadAssertEquals(1, lock.getWaitQueueLength(c));
793	<	c.await();
794	<	lock.unlock();
795	<	}
796	<	catch(InterruptedException e) {
797	<	threadUnexpectedException();
798	<	}
799	<	}
800	<	});
772	>	final CountDownLatch locked1 = new CountDownLatch(1);
773	>	final CountDownLatch locked2 = new CountDownLatch(1);
774	>	Thread t1 = new Thread(new CheckedRunnable() {
775	>	public void realRun() throws InterruptedException {
776	>	lock.lock();
777	>	assertFalse(lock.hasWaiters(c));
778	>	assertEquals(0, lock.getWaitQueueLength(c));
779	>	locked1.countDown();
780	>	c.await();
781	>	lock.unlock();
782	>	}});
783	>
784	>	Thread t2 = new Thread(new CheckedRunnable() {
785	>	public void realRun() throws InterruptedException {
786	>	lock.lock();
787	>	assertTrue(lock.hasWaiters(c));
788	>	assertEquals(1, lock.getWaitQueueLength(c));
789	>	locked2.countDown();
790	>	c.await();
791	>	lock.unlock();
792	>	}});
793	>
794	>	lock.lock();
795	>	assertEquals(0, lock.getWaitQueueLength(c));
796	>	lock.unlock();
797	>
798	>	t1.start();
799	>	await(locked1);
800	>
801	>	lock.lock();
802	>	assertHasWaiters(lock, c, t1);
803	>	assertEquals(1, lock.getWaitQueueLength(c));
804	>	lock.unlock();
805	>
806	>	t2.start();
807	>	await(locked2);
808	>
809	>	lock.lock();
810	>	assertHasWaiters(lock, c, t1, t2);
811	>	assertEquals(2, lock.getWaitQueueLength(c));
812	>	c.signalAll();
813	>	assertHasNoWaiters(lock, c);
814	>	lock.unlock();
815
816	<	try {
817	<	t1.start();
818	<	Thread.sleep(SHORT_DELAY_MS);
819	<	t2.start();
706	<	Thread.sleep(SHORT_DELAY_MS);
707	<	lock.lock();
708	<	assertTrue(lock.hasWaiters(c));
709	<	assertEquals(2, lock.getWaitQueueLength(c));
710	<	c.signalAll();
711	<	lock.unlock();
712	<	Thread.sleep(SHORT_DELAY_MS);
713	<	lock.lock();
714	<	assertFalse(lock.hasWaiters(c));
715	<	assertEquals(0, lock.getWaitQueueLength(c));
716	<	lock.unlock();
717	<	t1.join(SHORT_DELAY_MS);
718	<	t2.join(SHORT_DELAY_MS);
719	<	assertFalse(t1.isAlive());
720	<	assertFalse(t2.isAlive());
721	<	}
722	<	catch (Exception ex) {
723	<	unexpectedException();
724	<	}
816	>	awaitTermination(t1);
817	>	awaitTermination(t2);
818	>
819	>	assertHasNoWaiters(lock, c);
820		}
821
822		/**
823		* getWaitingThreads returns only and all waiting threads
824		*/
825	<	public void testGetWaitingThreads() {
826	<	final PublicReentrantLock lock = new PublicReentrantLock();
825	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
826	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
827	>	public void testGetWaitingThreads(boolean fair) {
828	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
829		final Condition c = lock.newCondition();
830	<	Thread t1 = new Thread(new Runnable() {
831	<	public void run() {
832	<	try {
833	<	lock.lock();
834	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
835	<	c.await();
836	<	lock.unlock();
837	<	}
838	<	catch(InterruptedException e) {
839	<	threadUnexpectedException();
840	<	}
841	<	}
842	<	});
843	<
844	<	Thread t2 = new Thread(new Runnable() {
845	<	public void run() {
846	<	try {
847	<	lock.lock();
848	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
849	<	c.await();
850	<	lock.unlock();
851	<	}
852	<	catch(InterruptedException e) {
853	<	threadUnexpectedException();
854	<	}
855	<	}
856	<	});
857	<
858	<	try {
859	<	lock.lock();
860	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
861	<	lock.unlock();
862	<	t1.start();
863	<	Thread.sleep(SHORT_DELAY_MS);
864	<	t2.start();
865	<	Thread.sleep(SHORT_DELAY_MS);
866	<	lock.lock();
867	<	assertTrue(lock.hasWaiters(c));
868	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
869	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
870	<	c.signalAll();
871	<	lock.unlock();
872	<	Thread.sleep(SHORT_DELAY_MS);
873	<	lock.lock();
874	<	assertFalse(lock.hasWaiters(c));
875	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
876	<	lock.unlock();
877	<	t1.join(SHORT_DELAY_MS);
878	<	t2.join(SHORT_DELAY_MS);
879	<	assertFalse(t1.isAlive());
783	<	assertFalse(t2.isAlive());
784	<	}
785	<	catch (Exception ex) {
786	<	unexpectedException();
787	<	}
830	>	final CountDownLatch locked1 = new CountDownLatch(1);
831	>	final CountDownLatch locked2 = new CountDownLatch(1);
832	>	Thread t1 = new Thread(new CheckedRunnable() {
833	>	public void realRun() throws InterruptedException {
834	>	lock.lock();
835	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
836	>	locked1.countDown();
837	>	c.await();
838	>	lock.unlock();
839	>	}});
840	>
841	>	Thread t2 = new Thread(new CheckedRunnable() {
842	>	public void realRun() throws InterruptedException {
843	>	lock.lock();
844	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
845	>	locked2.countDown();
846	>	c.await();
847	>	lock.unlock();
848	>	}});
849	>
850	>	lock.lock();
851	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
852	>	lock.unlock();
853	>
854	>	t1.start();
855	>	await(locked1);
856	>
857	>	lock.lock();
858	>	assertHasWaiters(lock, c, t1);
859	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
860	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
861	>	assertEquals(1, lock.getWaitingThreads(c).size());
862	>	lock.unlock();
863	>
864	>	t2.start();
865	>	await(locked2);
866	>
867	>	lock.lock();
868	>	assertHasWaiters(lock, c, t1, t2);
869	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
870	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
871	>	assertEquals(2, lock.getWaitingThreads(c).size());
872	>	c.signalAll();
873	>	assertHasNoWaiters(lock, c);
874	>	lock.unlock();
875	>
876	>	awaitTermination(t1);
877	>	awaitTermination(t2);
878	>
879	>	assertHasNoWaiters(lock, c);
880		}
881
790	–
791	–
882		/**
883	<	* awaitUninterruptibly doesn't abort on interrupt
884	<	*/
885	<	public void testAwaitUninterruptibly() {
886	<	final ReentrantLock lock = new ReentrantLock();
883	>	* awaitUninterruptibly is uninterruptible
884	>	*/
885	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
886	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
887	>	public void testAwaitUninterruptibly(boolean fair) {
888	>	final ReentrantLock lock = new ReentrantLock(fair);
889		final Condition c = lock.newCondition();
890	<	Thread t = new Thread(new Runnable() {
799	<	public void run() {
800	<	lock.lock();
801	<	c.awaitUninterruptibly();
802	<	lock.unlock();
803	<	}
804	<	});
890	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
891
892	<	try {
893	<	t.start();
894	<	Thread.sleep(SHORT_DELAY_MS);
895	<	t.interrupt();
896	<	lock.lock();
897	<	c.signal();
898	<	lock.unlock();
899	<	assert(t.isInterrupted());
900	<	t.join(SHORT_DELAY_MS);
901	<	assertFalse(t.isAlive());
902	<	}
903	<	catch (Exception ex) {
904	<	unexpectedException();
905	<	}
892	>	Thread t1 = newStartedThread(new CheckedRunnable() {
893	>	public void realRun() {
894	>	// Interrupt before awaitUninterruptibly
895	>	lock.lock();
896	>	pleaseInterrupt.countDown();
897	>	Thread.currentThread().interrupt();
898	>	c.awaitUninterruptibly();
899	>	assertTrue(Thread.interrupted());
900	>	lock.unlock();
901	>	}});
902	>
903	>	Thread t2 = newStartedThread(new CheckedRunnable() {
904	>	public void realRun() {
905	>	// Interrupt during awaitUninterruptibly
906	>	lock.lock();
907	>	pleaseInterrupt.countDown();
908	>	c.awaitUninterruptibly();
909	>	assertTrue(Thread.interrupted());
910	>	lock.unlock();
911	>	}});
912	>
913	>	await(pleaseInterrupt);
914	>	lock.lock();
915	>	lock.unlock();
916	>	t2.interrupt();
917	>
918	>	assertThreadStaysAlive(t1);
919	>	assertTrue(t2.isAlive());
920	>
921	>	lock.lock();
922	>	c.signalAll();
923	>	lock.unlock();
924	>
925	>	awaitTermination(t1);
926	>	awaitTermination(t2);
927		}
928
929		/**
930	<	* await is interruptible
931	<	*/
932	<	public void testAwait_Interrupt() {
933	<	final ReentrantLock lock = new ReentrantLock();
930	>	* await/awaitNanos/awaitUntil is interruptible
931	>	*/
932	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
933	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
934	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
935	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
936	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
937	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
938	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
939	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
940	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
941	>	final PublicReentrantLock lock =
942	>	new PublicReentrantLock(fair);
943		final Condition c = lock.newCondition();
944	<	Thread t = new Thread(new Runnable() {
945	<	public void run() {
946	<	try {
947	<	lock.lock();
948	<	c.await();
949	<	lock.unlock();
950	<	threadShouldThrow();
951	<	}
952	<	catch(InterruptedException success) {
953	<	}
954	<	}
955	<	});
956	<
957	<	try {
958	<	t.start();
959	<	Thread.sleep(SHORT_DELAY_MS);
960	<	t.interrupt();
961	<	t.join(SHORT_DELAY_MS);
962	<	assertFalse(t.isAlive());
963	<	}
964	<	catch (Exception ex) {
965	<	unexpectedException();
850	<	}
944	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
945	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
946	>	public void realRun() throws InterruptedException {
947	>	lock.lock();
948	>	assertLockedByMoi(lock);
949	>	assertHasNoWaiters(lock, c);
950	>	pleaseInterrupt.countDown();
951	>	try {
952	>	await(c, awaitMethod);
953	>	} finally {
954	>	assertLockedByMoi(lock);
955	>	assertHasNoWaiters(lock, c);
956	>	lock.unlock();
957	>	assertFalse(Thread.interrupted());
958	>	}
959	>	}});
960	>
961	>	await(pleaseInterrupt);
962	>	assertHasWaiters(lock, c, t);
963	>	t.interrupt();
964	>	awaitTermination(t);
965	>	assertNotLocked(lock);
966		}
967
968		/**
969	<	* awaitNanos is interruptible
969	>	* signalAll wakes up all threads
970		*/
971	<	public void testAwaitNanos_Interrupt() {
972	<	final ReentrantLock lock = new ReentrantLock();
971	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
972	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
973	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
974	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
975	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
976	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
977	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
978	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
979	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
980	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
981		final Condition c = lock.newCondition();
982	<	Thread t = new Thread(new Runnable() {
983	<	public void run() {
984	<	try {
985	<	lock.lock();
986	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
987	<	lock.unlock();
988	<	threadShouldThrow();
989	<	}
990	<	catch(InterruptedException success) {
991	<	}
992	<	}
993	<	});
994	<
995	<	try {
996	<	t.start();
997	<	Thread.sleep(SHORT_DELAY_MS);
998	<	t.interrupt();
999	<	t.join(SHORT_DELAY_MS);
1000	<	assertFalse(t.isAlive());
1001	<	}
1002	<	catch (Exception ex) {
880	<	unexpectedException();
881	<	}
982	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
983	>	class Awaiter extends CheckedRunnable {
984	>	public void realRun() throws InterruptedException {
985	>	lock.lock();
986	>	pleaseSignal.countDown();
987	>	await(c, awaitMethod);
988	>	lock.unlock();
989	>	}
990	>	}
991	>
992	>	Thread t1 = newStartedThread(new Awaiter());
993	>	Thread t2 = newStartedThread(new Awaiter());
994	>
995	>	await(pleaseSignal);
996	>	lock.lock();
997	>	assertHasWaiters(lock, c, t1, t2);
998	>	c.signalAll();
999	>	assertHasNoWaiters(lock, c);
1000	>	lock.unlock();
1001	>	awaitTermination(t1);
1002	>	awaitTermination(t2);
1003		}
1004
1005		/**
1006	<	* awaitUntil is interruptible
1007	<	*/
1008	<	public void testAwaitUntil_Interrupt() {
1009	<	final ReentrantLock lock = new ReentrantLock();
1006	>	* signal wakes up waiting threads in FIFO order
1007	>	*/
1008	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1009	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1010	>	public void testSignalWakesFifo(boolean fair) {
1011	>	final PublicReentrantLock lock =
1012	>	new PublicReentrantLock(fair);
1013		final Condition c = lock.newCondition();
1014	<	Thread t = new Thread(new Runnable() {
1015	<	public void run() {
1016	<	try {
1017	<	lock.lock();
1018	<	java.util.Date d = new java.util.Date();
1019	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1020	<	lock.unlock();
1021	<	threadShouldThrow();
1022	<	}
1023	<	catch(InterruptedException success) {
1024	<	}
1025	<	}
1026	<	});
1027	<
1028	<	try {
1029	<	t.start();
1030	<	Thread.sleep(SHORT_DELAY_MS);
1031	<	t.interrupt();
1032	<	t.join(SHORT_DELAY_MS);
1033	<	assertFalse(t.isAlive());
1034	<	}
1035	<	catch (Exception ex) {
1036	<	unexpectedException();
1037	<	}
1014	>	final CountDownLatch locked1 = new CountDownLatch(1);
1015	>	final CountDownLatch locked2 = new CountDownLatch(1);
1016	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1017	>	public void realRun() throws InterruptedException {
1018	>	lock.lock();
1019	>	locked1.countDown();
1020	>	c.await();
1021	>	lock.unlock();
1022	>	}});
1023	>
1024	>	await(locked1);
1025	>
1026	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1027	>	public void realRun() throws InterruptedException {
1028	>	lock.lock();
1029	>	locked2.countDown();
1030	>	c.await();
1031	>	lock.unlock();
1032	>	}});
1033	>
1034	>	await(locked2);
1035	>
1036	>	lock.lock();
1037	>	assertHasWaiters(lock, c, t1, t2);
1038	>	assertFalse(lock.hasQueuedThreads());
1039	>	c.signal();
1040	>	assertHasWaiters(lock, c, t2);
1041	>	assertTrue(lock.hasQueuedThread(t1));
1042	>	assertFalse(lock.hasQueuedThread(t2));
1043	>	c.signal();
1044	>	assertHasNoWaiters(lock, c);
1045	>	assertTrue(lock.hasQueuedThread(t1));
1046	>	assertTrue(lock.hasQueuedThread(t2));
1047	>	lock.unlock();
1048	>	awaitTermination(t1);
1049	>	awaitTermination(t2);
1050		}
1051
1052		/**
1053	<	* signalAll wakes up all threads
1054	<	*/
1055	<	public void testSignalAll() {
1056	<	final ReentrantLock lock = new ReentrantLock();
1053	>	* await after multiple reentrant locking preserves lock count
1054	>	*/
1055	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1056	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1057	>	public void testAwaitLockCount(boolean fair) {
1058	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1059		final Condition c = lock.newCondition();
1060	<	Thread t1 = new Thread(new Runnable() {
1061	<	public void run() {
1062	<	try {
1063	<	lock.lock();
1064	<	c.await();
1065	<	lock.unlock();
1066	<	}
1067	<	catch(InterruptedException e) {
1068	<	threadUnexpectedException();
1069	<	}
1070	<	}
1071	<	});
1072	<
1073	<	Thread t2 = new Thread(new Runnable() {
1074	<	public void run() {
1075	<	try {
1076	<	lock.lock();
1077	<	c.await();
1078	<	lock.unlock();
1079	<	}
1080	<	catch(InterruptedException e) {
1081	<	threadUnexpectedException();
1082	<	}
1083	<	}
1084	<	});
1085	<
1086	<	try {
1087	<	t1.start();
1088	<	t2.start();
1089	<	Thread.sleep(SHORT_DELAY_MS);
1090	<	lock.lock();
1091	<	c.signalAll();
1092	<	lock.unlock();
1093	<	t1.join(SHORT_DELAY_MS);
1094	<	t2.join(SHORT_DELAY_MS);
1095	<	assertFalse(t1.isAlive());
958	<	assertFalse(t2.isAlive());
959	<	}
960	<	catch (Exception ex) {
961	<	unexpectedException();
962	<	}
1060	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1061	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1062	>	public void realRun() throws InterruptedException {
1063	>	lock.lock();
1064	>	assertLockedByMoi(lock);
1065	>	assertEquals(1, lock.getHoldCount());
1066	>	pleaseSignal.countDown();
1067	>	c.await();
1068	>	assertLockedByMoi(lock);
1069	>	assertEquals(1, lock.getHoldCount());
1070	>	lock.unlock();
1071	>	}});
1072	>
1073	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1074	>	public void realRun() throws InterruptedException {
1075	>	lock.lock();
1076	>	lock.lock();
1077	>	assertLockedByMoi(lock);
1078	>	assertEquals(2, lock.getHoldCount());
1079	>	pleaseSignal.countDown();
1080	>	c.await();
1081	>	assertLockedByMoi(lock);
1082	>	assertEquals(2, lock.getHoldCount());
1083	>	lock.unlock();
1084	>	lock.unlock();
1085	>	}});
1086	>
1087	>	await(pleaseSignal);
1088	>	lock.lock();
1089	>	assertHasWaiters(lock, c, t1, t2);
1090	>	assertEquals(1, lock.getHoldCount());
1091	>	c.signalAll();
1092	>	assertHasNoWaiters(lock, c);
1093	>	lock.unlock();
1094	>	awaitTermination(t1);
1095	>	awaitTermination(t2);
1096		}
1097
1098		/**
1099		* A serialized lock deserializes as unlocked
1100		*/
1101	<	public void testSerialization() {
1102	<	ReentrantLock l = new ReentrantLock();
1103	<	l.lock();
1104	<	l.unlock();
1105	<
1106	<	try {
1107	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1108	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1109	<	out.writeObject(l);
1110	<	out.close();
1111	<
1112	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1113	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1114	<	ReentrantLock r = (ReentrantLock) in.readObject();
1115	<	r.lock();
1116	<	r.unlock();
1117	<	} catch(Exception e){
1118	<	e.printStackTrace();
1119	<	unexpectedException();
1120	<	}
1101	>	public void testSerialization()      { testSerialization(false); }
1102	>	public void testSerialization_fair() { testSerialization(true); }
1103	>	public void testSerialization(boolean fair) {
1104	>	ReentrantLock lock = new ReentrantLock(fair);
1105	>	lock.lock();
1106	>
1107	>	ReentrantLock clone = serialClone(lock);
1108	>	assertEquals(lock.isFair(), clone.isFair());
1109	>	assertTrue(lock.isLocked());
1110	>	assertFalse(clone.isLocked());
1111	>	assertEquals(1, lock.getHoldCount());
1112	>	assertEquals(0, clone.getHoldCount());
1113	>	clone.lock();
1114	>	clone.lock();
1115	>	assertTrue(clone.isLocked());
1116	>	assertEquals(2, clone.getHoldCount());
1117	>	assertEquals(1, lock.getHoldCount());
1118	>	clone.unlock();
1119	>	clone.unlock();
1120	>	assertTrue(lock.isLocked());
1121	>	assertFalse(clone.isLocked());
1122		}
1123
1124	+	/**
1125	+	* toString indicates current lock state
1126	+	*/
1127	+	public void testToString()      { testToString(false); }
1128	+	public void testToString_fair() { testToString(true); }
1129	+	public void testToString(boolean fair) {
1130	+	ReentrantLock lock = new ReentrantLock(fair);
1131	+	assertTrue(lock.toString().contains("Unlocked"));
1132	+	lock.lock();
1133	+	assertTrue(lock.toString().contains("Locked"));
1134	+	lock.unlock();
1135	+	assertTrue(lock.toString().contains("Unlocked"));
1136	+	}
1137		}

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