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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 1.62 by jsr166, Fri Jul 3 01:25:15 2015 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.*;
12	<	import java.util.*;
13	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>
11	>	import java.util.Arrays;
12	>	import java.util.Collection;
13	>	import java.util.HashSet;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import java.util.concurrent.CyclicBarrier;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.ReentrantLock;
18	>
19	>	import junit.framework.AssertionFailedError;
20	>	import junit.framework.Test;
21	>	import junit.framework.TestSuite;
22
23		public class ReentrantLockTest extends JSR166TestCase {
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
25	>	main(suite(), args);
26		}
27		public static Test suite() {
28	<	return new TestSuite(ReentrantLockTest.class);
28	>	return new TestSuite(ReentrantLockTest.class);
29		}
30
31		/**
32	<	* A runnable calling lockInterruptibly
32	>	* A checked runnable calling lockInterruptibly
33		*/
34	<	class InterruptibleLockRunnable implements Runnable {
34	>	class InterruptibleLockRunnable extends CheckedRunnable {
35		final ReentrantLock lock;
36	<	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
37	<	public void run() {
38	<	try {
31	<	lock.lockInterruptibly();
32	<	} catch(InterruptedException success){}
36	>	InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; }
37	>	public void realRun() throws InterruptedException {
38	>	lock.lockInterruptibly();
39		}
40		}
41
36	–
42		/**
43	<	* A runnable calling lockInterruptibly that expects to be
43	>	* A checked runnable calling lockInterruptibly that expects to be
44		* interrupted
45		*/
46	<	class InterruptedLockRunnable implements Runnable {
46	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
47		final ReentrantLock lock;
48	<	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
49	<	public void run() {
50	<	try {
46	<	lock.lockInterruptibly();
47	<	threadShouldThrow();
48	<	} catch(InterruptedException success){}
48	>	InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; }
49	>	public void realRun() throws InterruptedException {
50	>	lock.lockInterruptibly();
51		}
52		}
53
#	Line 54 | Line 56 | public class ReentrantLockTest extends J
56		*/
57		static class PublicReentrantLock extends ReentrantLock {
58		PublicReentrantLock() { super(); }
59	<	public Collection<Thread> getQueuedThreads() {
60	<	return super.getQueuedThreads();
59	>	PublicReentrantLock(boolean fair) { super(fair); }
60	>	public Thread getOwner() {
61	>	return super.getOwner();
62		}
63	<	public Collection<Thread> getWaitingThreads(Condition c) {
64	<	return super.getWaitingThreads(c);
63	>	public Collection<Thread> getQueuedThreads() {
64	>	return super.getQueuedThreads();
65		}
66	+	public Collection<Thread> getWaitingThreads(Condition c) {
67	+	return super.getWaitingThreads(c);
68	+	}
69	+	}
70
71	+	/**
72	+	* Releases write lock, checking that it had a hold count of 1.
73	+	*/
74	+	void releaseLock(PublicReentrantLock lock) {
75	+	assertLockedByMoi(lock);
76	+	lock.unlock();
77	+	assertFalse(lock.isHeldByCurrentThread());
78	+	assertNotLocked(lock);
79	+	}
80
81	+	/**
82	+	* Spin-waits until lock.hasQueuedThread(t) becomes true.
83	+	*/
84	+	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
85	+	long startTime = System.nanoTime();
86	+	while (!lock.hasQueuedThread(t)) {
87	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
88	+	throw new AssertionFailedError("timed out");
89	+	Thread.yield();
90	+	}
91	+	assertTrue(t.isAlive());
92	+	assertNotSame(t, lock.getOwner());
93		}
94
95		/**
96	<	* Constructor sets given fairness
96	>	* Checks that lock is not locked.
97		*/
98	<	public void testConstructor() {
99	<	ReentrantLock rl = new ReentrantLock();
100	<	assertFalse(rl.isFair());
101	<	ReentrantLock r2 = new ReentrantLock(true);
102	<	assertTrue(r2.isFair());
98	>	void assertNotLocked(PublicReentrantLock lock) {
99	>	assertFalse(lock.isLocked());
100	>	assertFalse(lock.isHeldByCurrentThread());
101	>	assertNull(lock.getOwner());
102	>	assertEquals(0, lock.getHoldCount());
103		}
104
105		/**
106	<	* locking an unlocked lock succeeds
106	>	* Checks that lock is locked by the given thread.
107		*/
108	<	public void testLock() {
109	<	ReentrantLock rl = new ReentrantLock();
110	<	rl.lock();
111	<	assertTrue(rl.isLocked());
112	<	rl.unlock();
108	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
109	>	assertTrue(lock.isLocked());
110	>	assertSame(t, lock.getOwner());
111	>	assertEquals(t == Thread.currentThread(),
112	>	lock.isHeldByCurrentThread());
113	>	assertEquals(t == Thread.currentThread(),
114	>	lock.getHoldCount() > 0);
115		}
116
117		/**
118	<	* locking an unlocked fair lock succeeds
118	>	* Checks that lock is locked by the current thread.
119		*/
120	<	public void testFairLock() {
121	<	ReentrantLock rl = new ReentrantLock(true);
92	<	rl.lock();
93	<	assertTrue(rl.isLocked());
94	<	rl.unlock();
120	>	void assertLockedByMoi(PublicReentrantLock lock) {
121	>	assertLockedBy(lock, Thread.currentThread());
122		}
123
124		/**
125	<	* Unlocking an unlocked lock throws IllegalMonitorStateException
125	>	* Checks that condition c has no waiters.
126		*/
127	<	public void testUnlock_IllegalMonitorStateException() {
128	<	ReentrantLock rl = new ReentrantLock();
129	<	try {
103	<	rl.unlock();
104	<	shouldThrow();
127	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
128	>	assertHasWaiters(lock, c, new Thread[] {});
129	>	}
130
131	<	} catch(IllegalMonitorStateException success){}
131	>	/**
132	>	* Checks that condition c has exactly the given waiter threads.
133	>	*/
134	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
135	>	Thread... threads) {
136	>	lock.lock();
137	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
138	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
139	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
140	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
141	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
142	>	new HashSet<Thread>(Arrays.asList(threads)));
143	>	lock.unlock();
144		}
145
146	+	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
147	+
148		/**
149	<	* tryLock on an unlocked lock succeeds
149	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
150	>	*/
151	>	void await(Condition c, AwaitMethod awaitMethod)
152	>	throws InterruptedException {
153	>	long timeoutMillis = 2 * LONG_DELAY_MS;
154	>	switch (awaitMethod) {
155	>	case await:
156	>	c.await();
157	>	break;
158	>	case awaitTimed:
159	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
160	>	break;
161	>	case awaitNanos:
162	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
163	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
164	>	assertTrue(nanosRemaining > timeoutNanos / 2);
165	>	assertTrue(nanosRemaining <= timeoutNanos);
166	>	break;
167	>	case awaitUntil:
168	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
169	>	break;
170	>	default:
171	>	throw new AssertionError();
172	>	}
173	>	}
174	>
175	>	/**
176	>	* Constructor sets given fairness, and is in unlocked state
177	>	*/
178	>	public void testConstructor() {
179	>	PublicReentrantLock lock;
180	>
181	>	lock = new PublicReentrantLock();
182	>	assertFalse(lock.isFair());
183	>	assertNotLocked(lock);
184	>
185	>	lock = new PublicReentrantLock(true);
186	>	assertTrue(lock.isFair());
187	>	assertNotLocked(lock);
188	>
189	>	lock = new PublicReentrantLock(false);
190	>	assertFalse(lock.isFair());
191	>	assertNotLocked(lock);
192	>	}
193	>
194	>	/**
195	>	* locking an unlocked lock succeeds
196		*/
197	<	public void testTryLock() {
198	<	ReentrantLock rl = new ReentrantLock();
199	<	assertTrue(rl.tryLock());
200	<	assertTrue(rl.isLocked());
201	<	rl.unlock();
197	>	public void testLock()      { testLock(false); }
198	>	public void testLock_fair() { testLock(true); }
199	>	public void testLock(boolean fair) {
200	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
201	>	lock.lock();
202	>	assertLockedByMoi(lock);
203	>	releaseLock(lock);
204		}
205
206	+	/**
207	+	* Unlocking an unlocked lock throws IllegalMonitorStateException
208	+	*/
209	+	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
210	+	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
211	+	public void testUnlock_IMSE(boolean fair) {
212	+	ReentrantLock lock = new ReentrantLock(fair);
213	+	try {
214	+	lock.unlock();
215	+	shouldThrow();
216	+	} catch (IllegalMonitorStateException success) {}
217	+	}
218	+
219	+	/**
220	+	* tryLock on an unlocked lock succeeds
221	+	*/
222	+	public void testTryLock()      { testTryLock(false); }
223	+	public void testTryLock_fair() { testTryLock(true); }
224	+	public void testTryLock(boolean fair) {
225	+	PublicReentrantLock lock = new PublicReentrantLock(fair);
226	+	assertTrue(lock.tryLock());
227	+	assertLockedByMoi(lock);
228	+	assertTrue(lock.tryLock());
229	+	assertLockedByMoi(lock);
230	+	lock.unlock();
231	+	releaseLock(lock);
232	+	}
233
234		/**
235		* hasQueuedThreads reports whether there are waiting threads
236		*/
237	<	public void testhasQueuedThreads() {
238	<	final ReentrantLock lock = new ReentrantLock();
237	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
238	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
239	>	public void testHasQueuedThreads(boolean fair) {
240	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
241		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
242		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
243	<	try {
244	<	assertFalse(lock.hasQueuedThreads());
245	<	lock.lock();
246	<	t1.start();
247	<	Thread.sleep(SHORT_DELAY_MS);
248	<	assertTrue(lock.hasQueuedThreads());
249	<	t2.start();
250	<	Thread.sleep(SHORT_DELAY_MS);
251	<	assertTrue(lock.hasQueuedThreads());
252	<	t1.interrupt();
253	<	Thread.sleep(SHORT_DELAY_MS);
254	<	assertTrue(lock.hasQueuedThreads());
255	<	lock.unlock();
256	<	Thread.sleep(SHORT_DELAY_MS);
257	<	assertFalse(lock.hasQueuedThreads());
258	<	t1.join();
143	<	t2.join();
144	<	} catch(Exception e){
145	<	unexpectedException();
146	<	}
147	<	}
243	>	assertFalse(lock.hasQueuedThreads());
244	>	lock.lock();
245	>	assertFalse(lock.hasQueuedThreads());
246	>	t1.start();
247	>	waitForQueuedThread(lock, t1);
248	>	assertTrue(lock.hasQueuedThreads());
249	>	t2.start();
250	>	waitForQueuedThread(lock, t2);
251	>	assertTrue(lock.hasQueuedThreads());
252	>	t1.interrupt();
253	>	awaitTermination(t1);
254	>	assertTrue(lock.hasQueuedThreads());
255	>	lock.unlock();
256	>	awaitTermination(t2);
257	>	assertFalse(lock.hasQueuedThreads());
258	>	}
259
260		/**
261		* getQueueLength reports number of waiting threads
262		*/
263	<	public void testGetQueueLength() {
264	<	final ReentrantLock lock = new ReentrantLock();
263	>	public void testGetQueueLength()      { testGetQueueLength(false); }
264	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
265	>	public void testGetQueueLength(boolean fair) {
266	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
267		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
268		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
269	+	assertEquals(0, lock.getQueueLength());
270	+	lock.lock();
271	+	t1.start();
272	+	waitForQueuedThread(lock, t1);
273	+	assertEquals(1, lock.getQueueLength());
274	+	t2.start();
275	+	waitForQueuedThread(lock, t2);
276	+	assertEquals(2, lock.getQueueLength());
277	+	t1.interrupt();
278	+	awaitTermination(t1);
279	+	assertEquals(1, lock.getQueueLength());
280	+	lock.unlock();
281	+	awaitTermination(t2);
282	+	assertEquals(0, lock.getQueueLength());
283	+	}
284	+
285	+	/**
286	+	* hasQueuedThread(null) throws NPE
287	+	*/
288	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
289	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
290	+	public void testHasQueuedThreadNPE(boolean fair) {
291	+	final ReentrantLock lock = new ReentrantLock(fair);
292		try {
293	<	assertEquals(0, lock.getQueueLength());
294	<	lock.lock();
295	<	t1.start();
296	<	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	<	}
293	>	lock.hasQueuedThread(null);
294	>	shouldThrow();
295	>	} catch (NullPointerException success) {}
296	>	}
297
298		/**
299	<	* getQueuedThreads includes waiting threads
299	>	* hasQueuedThread reports whether a thread is queued
300		*/
301	<	public void testGetQueuedThreads() {
302	<	final PublicReentrantLock lock = new PublicReentrantLock();
301	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
302	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
303	>	public void testHasQueuedThread(boolean fair) {
304	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
305		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
306		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
307	<	try {
308	<	assertTrue(lock.getQueuedThreads().isEmpty());
309	<	lock.lock();
310	<	assertTrue(lock.getQueuedThreads().isEmpty());
311	<	t1.start();
312	<	Thread.sleep(SHORT_DELAY_MS);
313	<	assertTrue(lock.getQueuedThreads().contains(t1));
314	<	t2.start();
315	<	Thread.sleep(SHORT_DELAY_MS);
316	<	assertTrue(lock.getQueuedThreads().contains(t1));
317	<	assertTrue(lock.getQueuedThreads().contains(t2));
318	<	t1.interrupt();
319	<	Thread.sleep(SHORT_DELAY_MS);
320	<	assertFalse(lock.getQueuedThreads().contains(t1));
321	<	assertTrue(lock.getQueuedThreads().contains(t2));
322	<	lock.unlock();
323	<	Thread.sleep(SHORT_DELAY_MS);
324	<	assertTrue(lock.getQueuedThreads().isEmpty());
325	<	t1.join();
326	<	t2.join();
205	<	} catch(Exception e){
206	<	unexpectedException();
207	<	}
208	<	}
209	<
307	>	assertFalse(lock.hasQueuedThread(t1));
308	>	assertFalse(lock.hasQueuedThread(t2));
309	>	lock.lock();
310	>	t1.start();
311	>	waitForQueuedThread(lock, t1);
312	>	assertTrue(lock.hasQueuedThread(t1));
313	>	assertFalse(lock.hasQueuedThread(t2));
314	>	t2.start();
315	>	waitForQueuedThread(lock, t2);
316	>	assertTrue(lock.hasQueuedThread(t1));
317	>	assertTrue(lock.hasQueuedThread(t2));
318	>	t1.interrupt();
319	>	awaitTermination(t1);
320	>	assertFalse(lock.hasQueuedThread(t1));
321	>	assertTrue(lock.hasQueuedThread(t2));
322	>	lock.unlock();
323	>	awaitTermination(t2);
324	>	assertFalse(lock.hasQueuedThread(t1));
325	>	assertFalse(lock.hasQueuedThread(t2));
326	>	}
327
328		/**
329	<	* timed tryLock is interruptible.
329	>	* getQueuedThreads includes waiting threads
330		*/
331	<	public void testInterruptedException2() {
332	<	final ReentrantLock lock = new ReentrantLock();
333	<	lock.lock();
334	<	Thread t = new Thread(new Runnable() {
335	<	public void run() {
336	<	try {
337	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
338	<	threadShouldThrow();
339	<	} catch(InterruptedException success){}
340	<	}
341	<	});
342	<	try {
343	<	t.start();
344	<	t.interrupt();
345	<	} catch(Exception e){
346	<	unexpectedException();
347	<	}
331	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
332	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
333	>	public void testGetQueuedThreads(boolean fair) {
334	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
335	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
336	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
337	>	assertTrue(lock.getQueuedThreads().isEmpty());
338	>	lock.lock();
339	>	assertTrue(lock.getQueuedThreads().isEmpty());
340	>	t1.start();
341	>	waitForQueuedThread(lock, t1);
342	>	assertEquals(1, lock.getQueuedThreads().size());
343	>	assertTrue(lock.getQueuedThreads().contains(t1));
344	>	t2.start();
345	>	waitForQueuedThread(lock, t2);
346	>	assertEquals(2, lock.getQueuedThreads().size());
347	>	assertTrue(lock.getQueuedThreads().contains(t1));
348	>	assertTrue(lock.getQueuedThreads().contains(t2));
349	>	t1.interrupt();
350	>	awaitTermination(t1);
351	>	assertFalse(lock.getQueuedThreads().contains(t1));
352	>	assertTrue(lock.getQueuedThreads().contains(t2));
353	>	assertEquals(1, lock.getQueuedThreads().size());
354	>	lock.unlock();
355	>	awaitTermination(t2);
356	>	assertTrue(lock.getQueuedThreads().isEmpty());
357		}
358
359	+	/**
360	+	* timed tryLock is interruptible
361	+	*/
362	+	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
363	+	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
364	+	public void testTryLock_Interruptible(boolean fair) {
365	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
366	+	lock.lock();
367	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
368	+	public void realRun() throws InterruptedException {
369	+	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
370	+	}});
371	+
372	+	waitForQueuedThread(lock, t);
373	+	t.interrupt();
374	+	awaitTermination(t);
375	+	releaseLock(lock);
376	+	}
377
378		/**
379	<	* TryLock on a locked lock fails
380	<	*/
381	<	public void testTryLockWhenLocked() {
382	<	final ReentrantLock lock = new ReentrantLock();
383	<	lock.lock();
384	<	Thread t = new Thread(new Runnable() {
385	<	public void run() {
386	<	threadAssertFalse(lock.tryLock());
387	<	}
388	<	});
389	<	try {
390	<	t.start();
391	<	t.join();
392	<	lock.unlock();
393	<	} catch(Exception e){
250	<	unexpectedException();
251	<	}
252	<	}
379	>	* tryLock on a locked lock fails
380	>	*/
381	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
382	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
383	>	public void testTryLockWhenLocked(boolean fair) {
384	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
385	>	lock.lock();
386	>	Thread t = newStartedThread(new CheckedRunnable() {
387	>	public void realRun() {
388	>	assertFalse(lock.tryLock());
389	>	}});
390	>
391	>	awaitTermination(t);
392	>	releaseLock(lock);
393	>	}
394
395		/**
396		* Timed tryLock on a locked lock times out
397		*/
398	<	public void testTryLock_Timeout() {
399	<	final ReentrantLock lock = new ReentrantLock();
400	<	lock.lock();
401	<	Thread t = new Thread(new Runnable() {
402	<	public void run() {
403	<	try {
404	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
405	<	} catch (Exception ex) {
406	<	threadUnexpectedException();
407	<	}
408	<	}
409	<	});
410	<	try {
411	<	t.start();
412	<	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	<	}
398	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
399	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
400	>	public void testTryLock_Timeout(boolean fair) {
401	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
402	>	lock.lock();
403	>	Thread t = newStartedThread(new CheckedRunnable() {
404	>	public void realRun() throws InterruptedException {
405	>	long startTime = System.nanoTime();
406	>	long timeoutMillis = 10;
407	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
408	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
409	>	}});
410	>
411	>	awaitTermination(t);
412	>	releaseLock(lock);
413		}
414	<
293	<
414	>
415		/**
416	<	* isLocked is true when locked and false when not
416	>	* getHoldCount returns number of recursive holds
417		*/
418	<	public void testIsLocked() {
419	<	final ReentrantLock lock = new ReentrantLock();
420	<	lock.lock();
421	<	assertTrue(lock.isLocked());
422	<	lock.unlock();
423	<	assertFalse(lock.isLocked());
424	<	Thread t = new Thread(new Runnable() {
425	<	public void run() {
426	<	lock.lock();
427	<	try {
428	<	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();
418	>	public void testGetHoldCount()      { testGetHoldCount(false); }
419	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
420	>	public void testGetHoldCount(boolean fair) {
421	>	ReentrantLock lock = new ReentrantLock(fair);
422	>	for (int i = 1; i <= SIZE; i++) {
423	>	lock.lock();
424	>	assertEquals(i, lock.getHoldCount());
425	>	}
426	>	for (int i = SIZE; i > 0; i--) {
427	>	lock.unlock();
428	>	assertEquals(i - 1, lock.getHoldCount());
429		}
430		}
431
326	–
432		/**
433	<	* lockInterruptibly is interruptible.
433	>	* isLocked is true when locked and false when not
434		*/
435	<	public void testLockInterruptibly1() {
436	<	final ReentrantLock lock = new ReentrantLock();
437	<	lock.lock();
333	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
435	>	public void testIsLocked()      { testIsLocked(false); }
436	>	public void testIsLocked_fair() { testIsLocked(true); }
437	>	public void testIsLocked(boolean fair) {
438		try {
439	<	t.start();
440	<	t.interrupt();
439	>	final ReentrantLock lock = new ReentrantLock(fair);
440	>	assertFalse(lock.isLocked());
441	>	lock.lock();
442	>	assertTrue(lock.isLocked());
443	>	lock.lock();
444	>	assertTrue(lock.isLocked());
445		lock.unlock();
446	<	t.join();
447	<	} catch(Exception e){
448	<	unexpectedException();
449	<	}
450	<	}
446	>	assertTrue(lock.isLocked());
447	>	lock.unlock();
448	>	assertFalse(lock.isLocked());
449	>	final CyclicBarrier barrier = new CyclicBarrier(2);
450	>	Thread t = newStartedThread(new CheckedRunnable() {
451	>	public void realRun() throws Exception {
452	>	lock.lock();
453	>	assertTrue(lock.isLocked());
454	>	barrier.await();
455	>	barrier.await();
456	>	lock.unlock();
457	>	}});
458	>
459	>	barrier.await();
460	>	assertTrue(lock.isLocked());
461	>	barrier.await();
462	>	awaitTermination(t);
463	>	assertFalse(lock.isLocked());
464	>	} catch (Exception fail) { threadUnexpectedException(fail); }
465	>	}
466
467		/**
468		* lockInterruptibly succeeds when unlocked, else is interruptible
469		*/
470	<	public void testLockInterruptibly2() {
471	<	final ReentrantLock lock = new ReentrantLock();
472	<	try {
473	<	lock.lockInterruptibly();
351	<	} catch(Exception e) {
352	<	unexpectedException();
353	<	}
354	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
470	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
471	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
472	>	public void testLockInterruptibly(boolean fair) {
473	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
474		try {
475	<	t.start();
476	<	t.interrupt();
477	<	assertTrue(lock.isLocked());
478	<	assertTrue(lock.isHeldByCurrentThread());
479	<	t.join();
480	<	} catch(Exception e){
481	<	unexpectedException();
482	<	}
475	>	lock.lockInterruptibly();
476	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
477	>	assertLockedByMoi(lock);
478	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
479	>	waitForQueuedThread(lock, t);
480	>	t.interrupt();
481	>	assertTrue(lock.isLocked());
482	>	assertTrue(lock.isHeldByCurrentThread());
483	>	awaitTermination(t);
484	>	releaseLock(lock);
485		}
486
487		/**
488		* Calling await without holding lock throws IllegalMonitorStateException
489		*/
490	<	public void testAwait_IllegalMonitor() {
491	<	final ReentrantLock lock = new ReentrantLock();
490	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
491	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
492	>	public void testAwait_IMSE(boolean fair) {
493	>	final ReentrantLock lock = new ReentrantLock(fair);
494		final Condition c = lock.newCondition();
495	<	try {
496	<	c.await();
497	<	shouldThrow();
498	<	}
499	<	catch (IllegalMonitorStateException success) {
500	<	}
501	<	catch (Exception ex) {
502	<	unexpectedException();
495	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
496	>	long startTime = System.nanoTime();
497	>	try {
498	>	await(c, awaitMethod);
499	>	shouldThrow();
500	>	} catch (IllegalMonitorStateException success) {
501	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
502	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
503		}
504		}
505
506		/**
507		* Calling signal without holding lock throws IllegalMonitorStateException
508		*/
509	<	public void testSignal_IllegalMonitor() {
510	<	final ReentrantLock lock = new ReentrantLock();
509	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
510	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
511	>	public void testSignal_IMSE(boolean fair) {
512	>	final ReentrantLock lock = new ReentrantLock(fair);
513		final Condition c = lock.newCondition();
514		try {
515		c.signal();
516		shouldThrow();
517	<	}
393	<	catch (IllegalMonitorStateException success) {
394	<	}
395	<	catch (Exception ex) {
396	<	unexpectedException();
397	<	}
517	>	} catch (IllegalMonitorStateException success) {}
518		}
519
520		/**
521		* awaitNanos without a signal times out
522		*/
523	<	public void testAwaitNanos_Timeout() {
524	<	final ReentrantLock lock = new ReentrantLock();
525	<	final Condition c = lock.newCondition();
523	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
524	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
525	>	public void testAwaitNanos_Timeout(boolean fair) {
526		try {
527	+	final ReentrantLock lock = new ReentrantLock(fair);
528	+	final Condition c = lock.newCondition();
529		lock.lock();
530	<	long t = c.awaitNanos(100);
531	<	assertTrue(t <= 0);
530	>	long startTime = System.nanoTime();
531	>	long timeoutMillis = 10;
532	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
533	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
534	>	assertTrue(nanosRemaining <= 0);
535	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
536		lock.unlock();
537	<	}
412	<	catch (Exception ex) {
413	<	unexpectedException();
414	<	}
537	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
538		}
539
540		/**
541	<	*  timed await without a signal times out
541	>	* timed await without a signal times out
542		*/
543	<	public void testAwait_Timeout() {
544	<	final ReentrantLock lock = new ReentrantLock();
545	<	final Condition c = lock.newCondition();
543	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
544	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
545	>	public void testAwait_Timeout(boolean fair) {
546		try {
547	+	final ReentrantLock lock = new ReentrantLock(fair);
548	+	final Condition c = lock.newCondition();
549		lock.lock();
550	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
550	>	long startTime = System.nanoTime();
551	>	long timeoutMillis = 10;
552	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
553	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
554		lock.unlock();
555	<	}
428	<	catch (Exception ex) {
429	<	unexpectedException();
430	<	}
555	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
556		}
557
558		/**
559		* awaitUntil without a signal times out
560		*/
561	<	public void testAwaitUntil_Timeout() {
562	<	final ReentrantLock lock = new ReentrantLock();
563	<	final Condition c = lock.newCondition();
561	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
562	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
563	>	public void testAwaitUntil_Timeout(boolean fair) {
564		try {
565	+	final ReentrantLock lock = new ReentrantLock(fair);
566	+	final Condition c = lock.newCondition();
567		lock.lock();
568	<	java.util.Date d = new java.util.Date();
569	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
568	>	long startTime = System.nanoTime();
569	>	assertFalse(c.awaitUntil(delayedDate(timeoutMillis())));
570	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
571		lock.unlock();
572	<	}
445	<	catch (Exception ex) {
446	<	unexpectedException();
447	<	}
572	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
573		}
574
575		/**
576		* await returns when signalled
577		*/
578	<	public void testAwait() {
579	<	final ReentrantLock lock = new ReentrantLock();
578	>	public void testAwait()      { testAwait(false); }
579	>	public void testAwait_fair() { testAwait(true); }
580	>	public void testAwait(boolean fair) {
581	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
582		final Condition c = lock.newCondition();
583	<	Thread t = new Thread(new Runnable() {
584	<	public void run() {
585	<	try {
586	<	lock.lock();
587	<	c.await();
588	<	lock.unlock();
589	<	}
590	<	catch(InterruptedException e) {
591	<	threadUnexpectedException();
592	<	}
593	<	}
594	<	});
595	<
596	<	try {
597	<	t.start();
598	<	Thread.sleep(SHORT_DELAY_MS);
599	<	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	<	}
583	>	final CountDownLatch locked = new CountDownLatch(1);
584	>	Thread t = newStartedThread(new CheckedRunnable() {
585	>	public void realRun() throws InterruptedException {
586	>	lock.lock();
587	>	locked.countDown();
588	>	c.await();
589	>	lock.unlock();
590	>	}});
591	>
592	>	await(locked);
593	>	lock.lock();
594	>	assertHasWaiters(lock, c, t);
595	>	c.signal();
596	>	assertHasNoWaiters(lock, c);
597	>	assertTrue(t.isAlive());
598	>	lock.unlock();
599	>	awaitTermination(t);
600		}
601
602		/**
603		* hasWaiters throws NPE if null
604		*/
605	<	public void testHasWaitersNPE() {
606	<	final ReentrantLock lock = new ReentrantLock();
605	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
606	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
607	>	public void testHasWaitersNPE(boolean fair) {
608	>	final ReentrantLock lock = new ReentrantLock(fair);
609		try {
610		lock.hasWaiters(null);
611		shouldThrow();
612	<	} catch (NullPointerException success) {
492	<	} catch (Exception ex) {
493	<	unexpectedException();
494	<	}
612	>	} catch (NullPointerException success) {}
613		}
614
615		/**
616		* getWaitQueueLength throws NPE if null
617		*/
618	<	public void testGetWaitQueueLengthNPE() {
619	<	final ReentrantLock lock = new ReentrantLock();
618	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
619	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
620	>	public void testGetWaitQueueLengthNPE(boolean fair) {
621	>	final ReentrantLock lock = new ReentrantLock(fair);
622		try {
623		lock.getWaitQueueLength(null);
624		shouldThrow();
625	<	} catch (NullPointerException success) {
506	<	} catch (Exception ex) {
507	<	unexpectedException();
508	<	}
625	>	} catch (NullPointerException success) {}
626		}
627
511	–
628		/**
629		* getWaitingThreads throws NPE if null
630		*/
631	<	public void testGetWaitingThreadsNPE() {
632	<	final PublicReentrantLock lock = new PublicReentrantLock();
631	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
632	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
633	>	public void testGetWaitingThreadsNPE(boolean fair) {
634	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
635		try {
636		lock.getWaitingThreads(null);
637		shouldThrow();
638	<	} catch (NullPointerException success) {
521	<	} catch (Exception ex) {
522	<	unexpectedException();
523	<	}
638	>	} catch (NullPointerException success) {}
639		}
640
526	–
641		/**
642	<	* hasWaiters throws IAE if not owned
642	>	* hasWaiters throws IllegalArgumentException if not owned
643		*/
644	<	public void testHasWaitersIAE() {
645	<	final ReentrantLock lock = new ReentrantLock();
646	<	final Condition c = (lock.newCondition());
647	<	final ReentrantLock lock2 = new ReentrantLock();
644	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
645	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
646	>	public void testHasWaitersIAE(boolean fair) {
647	>	final ReentrantLock lock = new ReentrantLock(fair);
648	>	final Condition c = lock.newCondition();
649	>	final ReentrantLock lock2 = new ReentrantLock(fair);
650		try {
651		lock2.hasWaiters(c);
652		shouldThrow();
653	<	} catch (IllegalArgumentException success) {
538	<	} catch (Exception ex) {
539	<	unexpectedException();
540	<	}
653	>	} catch (IllegalArgumentException success) {}
654		}
655
656		/**
657	<	* hasWaiters throws IMSE if not locked
657	>	* hasWaiters throws IllegalMonitorStateException if not locked
658		*/
659	<	public void testHasWaitersIMSE() {
660	<	final ReentrantLock lock = new ReentrantLock();
661	<	final Condition c = (lock.newCondition());
659	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
660	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
661	>	public void testHasWaitersIMSE(boolean fair) {
662	>	final ReentrantLock lock = new ReentrantLock(fair);
663	>	final Condition c = lock.newCondition();
664		try {
665		lock.hasWaiters(c);
666		shouldThrow();
667	<	} catch (IllegalMonitorStateException success) {
553	<	} catch (Exception ex) {
554	<	unexpectedException();
555	<	}
667	>	} catch (IllegalMonitorStateException success) {}
668		}
669
558	–
670		/**
671	<	* getWaitQueueLength throws IAE if not owned
671	>	* getWaitQueueLength throws IllegalArgumentException if not owned
672		*/
673	<	public void testGetWaitQueueLengthIAE() {
674	<	final ReentrantLock lock = new ReentrantLock();
675	<	final Condition c = (lock.newCondition());
676	<	final ReentrantLock lock2 = new ReentrantLock();
673	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
674	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
675	>	public void testGetWaitQueueLengthIAE(boolean fair) {
676	>	final ReentrantLock lock = new ReentrantLock(fair);
677	>	final Condition c = lock.newCondition();
678	>	final ReentrantLock lock2 = new ReentrantLock(fair);
679		try {
680		lock2.getWaitQueueLength(c);
681		shouldThrow();
682	<	} catch (IllegalArgumentException success) {
570	<	} catch (Exception ex) {
571	<	unexpectedException();
572	<	}
682	>	} catch (IllegalArgumentException success) {}
683		}
684
685		/**
686	<	* getWaitQueueLength throws IMSE if not locked
686	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
687		*/
688	<	public void testGetWaitQueueLengthIMSE() {
689	<	final ReentrantLock lock = new ReentrantLock();
690	<	final Condition c = (lock.newCondition());
688	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
689	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
690	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
691	>	final ReentrantLock lock = new ReentrantLock(fair);
692	>	final Condition c = lock.newCondition();
693		try {
694		lock.getWaitQueueLength(c);
695		shouldThrow();
696	<	} catch (IllegalMonitorStateException success) {
585	<	} catch (Exception ex) {
586	<	unexpectedException();
587	<	}
696	>	} catch (IllegalMonitorStateException success) {}
697		}
698
590	–
699		/**
700	<	* getWaitingThreads throws IAE if not owned
700	>	* getWaitingThreads throws IllegalArgumentException if not owned
701		*/
702	<	public void testGetWaitingThreadsIAE() {
703	<	final PublicReentrantLock lock = new PublicReentrantLock();
704	<	final Condition c = (lock.newCondition());
705	<	final PublicReentrantLock lock2 = new PublicReentrantLock();
702	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
703	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
704	>	public void testGetWaitingThreadsIAE(boolean fair) {
705	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
706	>	final Condition c = lock.newCondition();
707	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
708		try {
709		lock2.getWaitingThreads(c);
710		shouldThrow();
711	<	} catch (IllegalArgumentException success) {
602	<	} catch (Exception ex) {
603	<	unexpectedException();
604	<	}
711	>	} catch (IllegalArgumentException success) {}
712		}
713
714		/**
715	<	* getWaitingThreads throws IMSE if not locked
715	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
716		*/
717	<	public void testGetWaitingThreadsIMSE() {
718	<	final PublicReentrantLock lock = new PublicReentrantLock();
719	<	final Condition c = (lock.newCondition());
717	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
718	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
719	>	public void testGetWaitingThreadsIMSE(boolean fair) {
720	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
721	>	final Condition c = lock.newCondition();
722		try {
723		lock.getWaitingThreads(c);
724		shouldThrow();
725	<	} catch (IllegalMonitorStateException success) {
617	<	} catch (Exception ex) {
618	<	unexpectedException();
619	<	}
725	>	} catch (IllegalMonitorStateException success) {}
726		}
727
622	–
623	–
728		/**
729		* hasWaiters returns true when a thread is waiting, else false
730		*/
731	<	public void testHasWaiters() {
732	<	final ReentrantLock lock = new ReentrantLock();
731	>	public void testHasWaiters()      { testHasWaiters(false); }
732	>	public void testHasWaiters_fair() { testHasWaiters(true); }
733	>	public void testHasWaiters(boolean fair) {
734	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
735		final Condition c = lock.newCondition();
736	<	Thread t = new Thread(new Runnable() {
737	<	public void run() {
738	<	try {
739	<	lock.lock();
740	<	threadAssertFalse(lock.hasWaiters(c));
741	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
742	<	c.await();
743	<	lock.unlock();
744	<	}
745	<	catch(InterruptedException e) {
746	<	threadUnexpectedException();
747	<	}
748	<	}
749	<	});
750	<
751	<	try {
752	<	t.start();
753	<	Thread.sleep(SHORT_DELAY_MS);
754	<	lock.lock();
755	<	assertTrue(lock.hasWaiters(c));
756	<	assertEquals(1, lock.getWaitQueueLength(c));
757	<	c.signal();
758	<	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	<	}
736	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
737	>	Thread t = newStartedThread(new CheckedRunnable() {
738	>	public void realRun() throws InterruptedException {
739	>	lock.lock();
740	>	assertHasNoWaiters(lock, c);
741	>	assertFalse(lock.hasWaiters(c));
742	>	pleaseSignal.countDown();
743	>	c.await();
744	>	assertHasNoWaiters(lock, c);
745	>	assertFalse(lock.hasWaiters(c));
746	>	lock.unlock();
747	>	}});
748	>
749	>	await(pleaseSignal);
750	>	lock.lock();
751	>	assertHasWaiters(lock, c, t);
752	>	assertTrue(lock.hasWaiters(c));
753	>	c.signal();
754	>	assertHasNoWaiters(lock, c);
755	>	assertFalse(lock.hasWaiters(c));
756	>	lock.unlock();
757	>	awaitTermination(t);
758	>	assertHasNoWaiters(lock, c);
759		}
760
761		/**
762		* getWaitQueueLength returns number of waiting threads
763		*/
764	<	public void testGetWaitQueueLength() {
765	<	final ReentrantLock lock = new ReentrantLock();
764	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
765	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
766	>	public void testGetWaitQueueLength(boolean fair) {
767	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
768		final Condition c = lock.newCondition();
769	<	Thread t1 = new Thread(new Runnable() {
770	<	public void run() {
771	<	try {
772	<	lock.lock();
773	<	threadAssertFalse(lock.hasWaiters(c));
774	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
775	<	c.await();
776	<	lock.unlock();
777	<	}
778	<	catch(InterruptedException e) {
779	<	threadUnexpectedException();
780	<	}
781	<	}
782	<	});
783	<
784	<	Thread t2 = new Thread(new Runnable() {
785	<	public void run() {
786	<	try {
787	<	lock.lock();
788	<	threadAssertTrue(lock.hasWaiters(c));
789	<	threadAssertEquals(1, lock.getWaitQueueLength(c));
790	<	c.await();
791	<	lock.unlock();
792	<	}
793	<	catch(InterruptedException e) {
794	<	threadUnexpectedException();
795	<	}
796	<	}
797	<	});
769	>	final CountDownLatch locked1 = new CountDownLatch(1);
770	>	final CountDownLatch locked2 = new CountDownLatch(1);
771	>	Thread t1 = new Thread(new CheckedRunnable() {
772	>	public void realRun() throws InterruptedException {
773	>	lock.lock();
774	>	assertFalse(lock.hasWaiters(c));
775	>	assertEquals(0, lock.getWaitQueueLength(c));
776	>	locked1.countDown();
777	>	c.await();
778	>	lock.unlock();
779	>	}});
780	>
781	>	Thread t2 = new Thread(new CheckedRunnable() {
782	>	public void realRun() throws InterruptedException {
783	>	lock.lock();
784	>	assertTrue(lock.hasWaiters(c));
785	>	assertEquals(1, lock.getWaitQueueLength(c));
786	>	locked2.countDown();
787	>	c.await();
788	>	lock.unlock();
789	>	}});
790	>
791	>	lock.lock();
792	>	assertEquals(0, lock.getWaitQueueLength(c));
793	>	lock.unlock();
794	>
795	>	t1.start();
796	>	await(locked1);
797	>
798	>	lock.lock();
799	>	assertHasWaiters(lock, c, t1);
800	>	assertEquals(1, lock.getWaitQueueLength(c));
801	>	lock.unlock();
802	>
803	>	t2.start();
804	>	await(locked2);
805	>
806	>	lock.lock();
807	>	assertHasWaiters(lock, c, t1, t2);
808	>	assertEquals(2, lock.getWaitQueueLength(c));
809	>	c.signalAll();
810	>	assertHasNoWaiters(lock, c);
811	>	lock.unlock();
812
813	<	try {
814	<	t1.start();
815	<	Thread.sleep(SHORT_DELAY_MS);
816	<	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	<	}
813	>	awaitTermination(t1);
814	>	awaitTermination(t2);
815	>
816	>	assertHasNoWaiters(lock, c);
817		}
818
819		/**
820		* getWaitingThreads returns only and all waiting threads
821		*/
822	<	public void testGetWaitingThreads() {
823	<	final PublicReentrantLock lock = new PublicReentrantLock();
822	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
823	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
824	>	public void testGetWaitingThreads(boolean fair) {
825	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
826		final Condition c = lock.newCondition();
827	<	Thread t1 = new Thread(new Runnable() {
828	<	public void run() {
829	<	try {
830	<	lock.lock();
831	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
832	<	c.await();
833	<	lock.unlock();
834	<	}
835	<	catch(InterruptedException e) {
836	<	threadUnexpectedException();
837	<	}
838	<	}
839	<	});
840	<
841	<	Thread t2 = new Thread(new Runnable() {
842	<	public void run() {
843	<	try {
844	<	lock.lock();
845	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
846	<	c.await();
847	<	lock.unlock();
848	<	}
849	<	catch(InterruptedException e) {
850	<	threadUnexpectedException();
851	<	}
852	<	}
853	<	});
854	<
855	<	try {
856	<	lock.lock();
857	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
858	<	lock.unlock();
859	<	t1.start();
860	<	Thread.sleep(SHORT_DELAY_MS);
861	<	t2.start();
862	<	Thread.sleep(SHORT_DELAY_MS);
863	<	lock.lock();
864	<	assertTrue(lock.hasWaiters(c));
865	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
866	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
867	<	c.signalAll();
868	<	lock.unlock();
869	<	Thread.sleep(SHORT_DELAY_MS);
870	<	lock.lock();
871	<	assertFalse(lock.hasWaiters(c));
872	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
873	<	lock.unlock();
874	<	t1.join(SHORT_DELAY_MS);
875	<	t2.join(SHORT_DELAY_MS);
876	<	assertFalse(t1.isAlive());
783	<	assertFalse(t2.isAlive());
784	<	}
785	<	catch (Exception ex) {
786	<	unexpectedException();
787	<	}
827	>	final CountDownLatch locked1 = new CountDownLatch(1);
828	>	final CountDownLatch locked2 = new CountDownLatch(1);
829	>	Thread t1 = new Thread(new CheckedRunnable() {
830	>	public void realRun() throws InterruptedException {
831	>	lock.lock();
832	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
833	>	locked1.countDown();
834	>	c.await();
835	>	lock.unlock();
836	>	}});
837	>
838	>	Thread t2 = new Thread(new CheckedRunnable() {
839	>	public void realRun() throws InterruptedException {
840	>	lock.lock();
841	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
842	>	locked2.countDown();
843	>	c.await();
844	>	lock.unlock();
845	>	}});
846	>
847	>	lock.lock();
848	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
849	>	lock.unlock();
850	>
851	>	t1.start();
852	>	await(locked1);
853	>
854	>	lock.lock();
855	>	assertHasWaiters(lock, c, t1);
856	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
857	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
858	>	assertEquals(1, lock.getWaitingThreads(c).size());
859	>	lock.unlock();
860	>
861	>	t2.start();
862	>	await(locked2);
863	>
864	>	lock.lock();
865	>	assertHasWaiters(lock, c, t1, t2);
866	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
867	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
868	>	assertEquals(2, lock.getWaitingThreads(c).size());
869	>	c.signalAll();
870	>	assertHasNoWaiters(lock, c);
871	>	lock.unlock();
872	>
873	>	awaitTermination(t1);
874	>	awaitTermination(t2);
875	>
876	>	assertHasNoWaiters(lock, c);
877		}
878
790	–
791	–
879		/**
880	<	* awaitUninterruptibly doesn't abort on interrupt
881	<	*/
882	<	public void testAwaitUninterruptibly() {
883	<	final ReentrantLock lock = new ReentrantLock();
880	>	* awaitUninterruptibly is uninterruptible
881	>	*/
882	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
883	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
884	>	public void testAwaitUninterruptibly(boolean fair) {
885	>	final ReentrantLock lock = new ReentrantLock(fair);
886		final Condition c = lock.newCondition();
887	<	Thread t = new Thread(new Runnable() {
799	<	public void run() {
800	<	lock.lock();
801	<	c.awaitUninterruptibly();
802	<	lock.unlock();
803	<	}
804	<	});
887	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
888
889	<	try {
890	<	t.start();
891	<	Thread.sleep(SHORT_DELAY_MS);
892	<	t.interrupt();
893	<	lock.lock();
894	<	c.signal();
895	<	lock.unlock();
896	<	assert(t.isInterrupted());
897	<	t.join(SHORT_DELAY_MS);
898	<	assertFalse(t.isAlive());
899	<	}
900	<	catch (Exception ex) {
901	<	unexpectedException();
902	<	}
889	>	Thread t1 = newStartedThread(new CheckedRunnable() {
890	>	public void realRun() {
891	>	// Interrupt before awaitUninterruptibly
892	>	lock.lock();
893	>	pleaseInterrupt.countDown();
894	>	Thread.currentThread().interrupt();
895	>	c.awaitUninterruptibly();
896	>	assertTrue(Thread.interrupted());
897	>	lock.unlock();
898	>	}});
899	>
900	>	Thread t2 = newStartedThread(new CheckedRunnable() {
901	>	public void realRun() {
902	>	// Interrupt during awaitUninterruptibly
903	>	lock.lock();
904	>	pleaseInterrupt.countDown();
905	>	c.awaitUninterruptibly();
906	>	assertTrue(Thread.interrupted());
907	>	lock.unlock();
908	>	}});
909	>
910	>	await(pleaseInterrupt);
911	>	lock.lock();
912	>	lock.unlock();
913	>	t2.interrupt();
914	>
915	>	assertThreadStaysAlive(t1);
916	>	assertTrue(t2.isAlive());
917	>
918	>	lock.lock();
919	>	c.signalAll();
920	>	lock.unlock();
921	>
922	>	awaitTermination(t1);
923	>	awaitTermination(t2);
924		}
925
926		/**
927	<	* await is interruptible
928	<	*/
929	<	public void testAwait_Interrupt() {
930	<	final ReentrantLock lock = new ReentrantLock();
927	>	* await/awaitNanos/awaitUntil is interruptible
928	>	*/
929	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
930	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
931	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
932	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
933	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
934	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
935	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
936	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
937	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
938	>	final PublicReentrantLock lock =
939	>	new PublicReentrantLock(fair);
940		final Condition c = lock.newCondition();
941	<	Thread t = new Thread(new Runnable() {
942	<	public void run() {
943	<	try {
944	<	lock.lock();
945	<	c.await();
946	<	lock.unlock();
947	<	threadShouldThrow();
948	<	}
949	<	catch(InterruptedException success) {
950	<	}
951	<	}
952	<	});
953	<
954	<	try {
955	<	t.start();
956	<	Thread.sleep(SHORT_DELAY_MS);
957	<	t.interrupt();
958	<	t.join(SHORT_DELAY_MS);
959	<	assertFalse(t.isAlive());
960	<	}
961	<	catch (Exception ex) {
962	<	unexpectedException();
850	<	}
941	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
942	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
943	>	public void realRun() throws InterruptedException {
944	>	lock.lock();
945	>	assertLockedByMoi(lock);
946	>	assertHasNoWaiters(lock, c);
947	>	pleaseInterrupt.countDown();
948	>	try {
949	>	await(c, awaitMethod);
950	>	} finally {
951	>	assertLockedByMoi(lock);
952	>	assertHasNoWaiters(lock, c);
953	>	lock.unlock();
954	>	assertFalse(Thread.interrupted());
955	>	}
956	>	}});
957	>
958	>	await(pleaseInterrupt);
959	>	assertHasWaiters(lock, c, t);
960	>	t.interrupt();
961	>	awaitTermination(t);
962	>	assertNotLocked(lock);
963		}
964
965		/**
966	<	* awaitNanos is interruptible
966	>	* signalAll wakes up all threads
967		*/
968	<	public void testAwaitNanos_Interrupt() {
969	<	final ReentrantLock lock = new ReentrantLock();
968	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
969	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
970	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
971	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
972	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
973	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
974	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
975	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
976	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
977	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
978		final Condition c = lock.newCondition();
979	<	Thread t = new Thread(new Runnable() {
980	<	public void run() {
981	<	try {
982	<	lock.lock();
983	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
984	<	lock.unlock();
985	<	threadShouldThrow();
986	<	}
987	<	catch(InterruptedException success) {
988	<	}
989	<	}
990	<	});
991	<
992	<	try {
993	<	t.start();
994	<	Thread.sleep(SHORT_DELAY_MS);
995	<	t.interrupt();
996	<	t.join(SHORT_DELAY_MS);
997	<	assertFalse(t.isAlive());
998	<	}
999	<	catch (Exception ex) {
880	<	unexpectedException();
881	<	}
979	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
980	>	class Awaiter extends CheckedRunnable {
981	>	public void realRun() throws InterruptedException {
982	>	lock.lock();
983	>	pleaseSignal.countDown();
984	>	await(c, awaitMethod);
985	>	lock.unlock();
986	>	}
987	>	}
988	>
989	>	Thread t1 = newStartedThread(new Awaiter());
990	>	Thread t2 = newStartedThread(new Awaiter());
991	>
992	>	await(pleaseSignal);
993	>	lock.lock();
994	>	assertHasWaiters(lock, c, t1, t2);
995	>	c.signalAll();
996	>	assertHasNoWaiters(lock, c);
997	>	lock.unlock();
998	>	awaitTermination(t1);
999	>	awaitTermination(t2);
1000		}
1001
1002		/**
1003	<	* awaitUntil is interruptible
1004	<	*/
1005	<	public void testAwaitUntil_Interrupt() {
1006	<	final ReentrantLock lock = new ReentrantLock();
1003	>	* signal wakes up waiting threads in FIFO order
1004	>	*/
1005	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1006	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1007	>	public void testSignalWakesFifo(boolean fair) {
1008	>	final PublicReentrantLock lock =
1009	>	new PublicReentrantLock(fair);
1010		final Condition c = lock.newCondition();
1011	<	Thread t = new Thread(new Runnable() {
1012	<	public void run() {
1013	<	try {
1014	<	lock.lock();
1015	<	java.util.Date d = new java.util.Date();
1016	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1017	<	lock.unlock();
1018	<	threadShouldThrow();
1019	<	}
1020	<	catch(InterruptedException success) {
1021	<	}
1022	<	}
1023	<	});
1024	<
1025	<	try {
1026	<	t.start();
1027	<	Thread.sleep(SHORT_DELAY_MS);
1028	<	t.interrupt();
1029	<	t.join(SHORT_DELAY_MS);
1030	<	assertFalse(t.isAlive());
1031	<	}
1032	<	catch (Exception ex) {
1033	<	unexpectedException();
1034	<	}
1011	>	final CountDownLatch locked1 = new CountDownLatch(1);
1012	>	final CountDownLatch locked2 = new CountDownLatch(1);
1013	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1014	>	public void realRun() throws InterruptedException {
1015	>	lock.lock();
1016	>	locked1.countDown();
1017	>	c.await();
1018	>	lock.unlock();
1019	>	}});
1020	>
1021	>	await(locked1);
1022	>
1023	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1024	>	public void realRun() throws InterruptedException {
1025	>	lock.lock();
1026	>	locked2.countDown();
1027	>	c.await();
1028	>	lock.unlock();
1029	>	}});
1030	>
1031	>	await(locked2);
1032	>
1033	>	lock.lock();
1034	>	assertHasWaiters(lock, c, t1, t2);
1035	>	assertFalse(lock.hasQueuedThreads());
1036	>	c.signal();
1037	>	assertHasWaiters(lock, c, t2);
1038	>	assertTrue(lock.hasQueuedThread(t1));
1039	>	assertFalse(lock.hasQueuedThread(t2));
1040	>	c.signal();
1041	>	assertHasNoWaiters(lock, c);
1042	>	assertTrue(lock.hasQueuedThread(t1));
1043	>	assertTrue(lock.hasQueuedThread(t2));
1044	>	lock.unlock();
1045	>	awaitTermination(t1);
1046	>	awaitTermination(t2);
1047		}
1048
1049		/**
1050	<	* signalAll wakes up all threads
1051	<	*/
1052	<	public void testSignalAll() {
1053	<	final ReentrantLock lock = new ReentrantLock();
1050	>	* await after multiple reentrant locking preserves lock count
1051	>	*/
1052	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1053	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1054	>	public void testAwaitLockCount(boolean fair) {
1055	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1056		final Condition c = lock.newCondition();
1057	<	Thread t1 = new Thread(new Runnable() {
1058	<	public void run() {
1059	<	try {
1060	<	lock.lock();
1061	<	c.await();
1062	<	lock.unlock();
1063	<	}
1064	<	catch(InterruptedException e) {
1065	<	threadUnexpectedException();
1066	<	}
1067	<	}
1068	<	});
1069	<
1070	<	Thread t2 = new Thread(new Runnable() {
1071	<	public void run() {
1072	<	try {
1073	<	lock.lock();
1074	<	c.await();
1075	<	lock.unlock();
1076	<	}
1077	<	catch(InterruptedException e) {
1078	<	threadUnexpectedException();
1079	<	}
1080	<	}
1081	<	});
1082	<
1083	<	try {
1084	<	t1.start();
1085	<	t2.start();
1086	<	Thread.sleep(SHORT_DELAY_MS);
1087	<	lock.lock();
1088	<	c.signalAll();
1089	<	lock.unlock();
1090	<	t1.join(SHORT_DELAY_MS);
1091	<	t2.join(SHORT_DELAY_MS);
1092	<	assertFalse(t1.isAlive());
958	<	assertFalse(t2.isAlive());
959	<	}
960	<	catch (Exception ex) {
961	<	unexpectedException();
962	<	}
1057	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1058	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1059	>	public void realRun() throws InterruptedException {
1060	>	lock.lock();
1061	>	assertLockedByMoi(lock);
1062	>	assertEquals(1, lock.getHoldCount());
1063	>	pleaseSignal.countDown();
1064	>	c.await();
1065	>	assertLockedByMoi(lock);
1066	>	assertEquals(1, lock.getHoldCount());
1067	>	lock.unlock();
1068	>	}});
1069	>
1070	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1071	>	public void realRun() throws InterruptedException {
1072	>	lock.lock();
1073	>	lock.lock();
1074	>	assertLockedByMoi(lock);
1075	>	assertEquals(2, lock.getHoldCount());
1076	>	pleaseSignal.countDown();
1077	>	c.await();
1078	>	assertLockedByMoi(lock);
1079	>	assertEquals(2, lock.getHoldCount());
1080	>	lock.unlock();
1081	>	lock.unlock();
1082	>	}});
1083	>
1084	>	await(pleaseSignal);
1085	>	lock.lock();
1086	>	assertHasWaiters(lock, c, t1, t2);
1087	>	assertEquals(1, lock.getHoldCount());
1088	>	c.signalAll();
1089	>	assertHasNoWaiters(lock, c);
1090	>	lock.unlock();
1091	>	awaitTermination(t1);
1092	>	awaitTermination(t2);
1093		}
1094
1095		/**
1096		* A serialized lock deserializes as unlocked
1097		*/
1098	<	public void testSerialization() {
1099	<	ReentrantLock l = new ReentrantLock();
1100	<	l.lock();
1101	<	l.unlock();
1102	<
1103	<	try {
1104	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1105	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1106	<	out.writeObject(l);
1107	<	out.close();
1108	<
1109	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1110	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1111	<	ReentrantLock r = (ReentrantLock) in.readObject();
1112	<	r.lock();
1113	<	r.unlock();
1114	<	} catch(Exception e){
1115	<	e.printStackTrace();
1116	<	unexpectedException();
1117	<	}
1098	>	public void testSerialization()      { testSerialization(false); }
1099	>	public void testSerialization_fair() { testSerialization(true); }
1100	>	public void testSerialization(boolean fair) {
1101	>	ReentrantLock lock = new ReentrantLock(fair);
1102	>	lock.lock();
1103	>
1104	>	ReentrantLock clone = serialClone(lock);
1105	>	assertEquals(lock.isFair(), clone.isFair());
1106	>	assertTrue(lock.isLocked());
1107	>	assertFalse(clone.isLocked());
1108	>	assertEquals(1, lock.getHoldCount());
1109	>	assertEquals(0, clone.getHoldCount());
1110	>	clone.lock();
1111	>	clone.lock();
1112	>	assertTrue(clone.isLocked());
1113	>	assertEquals(2, clone.getHoldCount());
1114	>	assertEquals(1, lock.getHoldCount());
1115	>	clone.unlock();
1116	>	clone.unlock();
1117	>	assertTrue(lock.isLocked());
1118	>	assertFalse(clone.isLocked());
1119		}
1120
1121	+	/**
1122	+	* toString indicates current lock state
1123	+	*/
1124	+	public void testToString()      { testToString(false); }
1125	+	public void testToString_fair() { testToString(true); }
1126	+	public void testToString(boolean fair) {
1127	+	ReentrantLock lock = new ReentrantLock(fair);
1128	+	assertTrue(lock.toString().contains("Unlocked"));
1129	+	lock.lock();
1130	+	assertTrue(lock.toString().contains("Locked"));
1131	+	lock.unlock();
1132	+	assertTrue(lock.toString().contains("Unlocked"));
1133	+	}
1134		}

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