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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.13 by dl, Sun Dec 28 21:56:18 2003 UTC vs.
Revision 1.63 by jsr166, Fri Jul 3 05:48:30 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	<
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	<	* Constructor sets given fairness
82	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
83		*/
84	<	public void testConstructor() {
85	<	ReentrantLock rl = new ReentrantLock();
86	<	assertFalse(rl.isFair());
87	<	ReentrantLock r2 = new ReentrantLock(true);
88	<	assertTrue(r2.isFair());
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	<	* locking an unlocked lock succeeds
96	>	* Checks that lock is not locked.
97		*/
98	<	public void testLock() {
99	<	ReentrantLock rl = new ReentrantLock();
100	<	rl.lock();
101	<	assertTrue(rl.isLocked());
102	<	rl.unlock();
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 fair lock succeeds
106	>	* Checks that lock is locked by the given thread.
107		*/
108	<	public void testFairLock() {
109	<	ReentrantLock rl = new ReentrantLock(true);
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	<	* Unlocking an unlocked lock throws IllegalMonitorStateException
118	>	* Checks that lock is locked by the current thread.
119		*/
120	<	public void testUnlock_IllegalMonitorStateException() {
121	<	ReentrantLock rl = new ReentrantLock();
122	<	try {
103	<	rl.unlock();
104	<	shouldThrow();
120	>	void assertLockedByMoi(PublicReentrantLock lock) {
121	>	assertLockedBy(lock, Thread.currentThread());
122	>	}
123
124	<	} catch(IllegalMonitorStateException success){}
124	>	/**
125	>	* Checks that condition c has no waiters.
126	>	*/
127	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
128	>	assertHasWaiters(lock, c, new Thread[] {});
129		}
130
131		/**
132	<	* trylock on an unlocked lock succeeds
132	>	* Checks that condition c has exactly the given waiter threads.
133		*/
134	<	public void testTryLock() {
135	<	ReentrantLock rl = new ReentrantLock();
136	<	assertTrue(rl.tryLock());
137	<	assertTrue(rl.isLocked());
138	<	rl.unlock();
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	<	* hasQueuedThreads reports whether there are waiting threads
149	>	* Awaits condition "indefinitely" using the specified AwaitMethod.
150		*/
151	<	public void testhasQueuedThreads() {
152	<	final ReentrantLock lock = new ReentrantLock();
153	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
154	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
155	<	try {
156	<	assertFalse(lock.hasQueuedThreads());
157	<	lock.lock();
158	<	t1.start();
159	<	Thread.sleep(SHORT_DELAY_MS);
160	<	assertTrue(lock.hasQueuedThreads());
161	<	t2.start();
162	<	Thread.sleep(SHORT_DELAY_MS);
163	<	assertTrue(lock.hasQueuedThreads());
164	<	t1.interrupt();
165	<	Thread.sleep(SHORT_DELAY_MS);
166	<	assertTrue(lock.hasQueuedThreads());
167	<	lock.unlock();
168	<	Thread.sleep(SHORT_DELAY_MS);
169	<	assertFalse(lock.hasQueuedThreads());
170	<	t1.join();
171	<	t2.join();
144	<	} catch(Exception e){
145	<	unexpectedException();
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	<	}
173	>	}
174
175		/**
176	<	* getQueueLength reports number of waiting threads
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 testGetQueueLength() {
198	<	final ReentrantLock lock = new ReentrantLock();
199	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
200	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
201	<	try {
202	<	assertEquals(0, lock.getQueueLength());
203	<	lock.lock();
204	<	t1.start();
160	<	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	<	}
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	<	* getQueuedThreads includes waiting threads
207	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
208		*/
209	<	public void testGetQueuedThreads() {
210	<	final PublicReentrantLock lock = new PublicReentrantLock();
211	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
212	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
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 {
186	–	assertTrue(lock.getQueuedThreads().isEmpty());
187	–	lock.lock();
188	–	assertTrue(lock.getQueuedThreads().isEmpty());
189	–	t1.start();
190	–	Thread.sleep(SHORT_DELAY_MS);
191	–	assertTrue(lock.getQueuedThreads().contains(t1));
192	–	t2.start();
193	–	Thread.sleep(SHORT_DELAY_MS);
194	–	assertTrue(lock.getQueuedThreads().contains(t1));
195	–	assertTrue(lock.getQueuedThreads().contains(t2));
196	–	t1.interrupt();
197	–	Thread.sleep(SHORT_DELAY_MS);
198	–	assertFalse(lock.getQueuedThreads().contains(t1));
199	–	assertTrue(lock.getQueuedThreads().contains(t2));
214		lock.unlock();
215	<	Thread.sleep(SHORT_DELAY_MS);
216	<	assertTrue(lock.getQueuedThreads().isEmpty());
217	<	t1.join();
204	<	t2.join();
205	<	} catch(Exception e){
206	<	unexpectedException();
207	<	}
208	<	}
209	<
215	>	shouldThrow();
216	>	} catch (IllegalMonitorStateException success) {}
217	>	}
218
219		/**
220	<	* timed trylock is interruptible.
220	>	* tryLock on an unlocked lock succeeds
221		*/
222	<	public void testInterruptedException2() {
223	<	final ReentrantLock lock = new ReentrantLock();
224	<	lock.lock();
225	<	Thread t = new Thread(new Runnable() {
226	<	public void run() {
227	<	try {
228	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
229	<	threadShouldThrow();
230	<	} catch(InterruptedException success){}
231	<	}
224	<	});
225	<	try {
226	<	t.start();
227	<	t.interrupt();
228	<	} catch(Exception e){
229	<	unexpectedException();
230	<	}
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()      { 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	+	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	<	* Trylock on a locked lock fails
261	>	* getQueueLength reports number of waiting threads
262		*/
263	<	public void testTryLockWhenLocked() {
264	<	final ReentrantLock lock = new ReentrantLock();
265	<	lock.lock();
266	<	Thread t = new Thread(new Runnable() {
267	<	public void run() {
268	<	threadAssertFalse(lock.tryLock());
269	<	}
270	<	});
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	<	t.start();
294	<	t.join();
295	<	lock.unlock();
296	<	} catch(Exception e){
250	<	unexpectedException();
251	<	}
252	<	}
293	>	lock.hasQueuedThread(null);
294	>	shouldThrow();
295	>	} catch (NullPointerException success) {}
296	>	}
297
298		/**
299	<	* Timed trylock on a locked lock times out
299	>	* hasQueuedThread reports whether a thread is queued
300		*/
301	<	public void testTryLock_Timeout() {
302	<	final ReentrantLock lock = new ReentrantLock();
303	<	lock.lock();
304	<	Thread t = new Thread(new Runnable() {
305	<	public void run() {
306	<	try {
307	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
308	<	} catch (Exception ex) {
309	<	threadUnexpectedException();
310	<	}
311	<	}
312	<	});
313	<	try {
314	<	t.start();
315	<	t.join();
316	<	lock.unlock();
317	<	} catch(Exception e){
318	<	unexpectedException();
319	<	}
320	<	}
321	<
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	>	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	<	* getHoldCount returns number of recursive holds
329	>	* getQueuedThreads includes waiting threads
330		*/
331	<	public void testGetHoldCount() {
332	<	ReentrantLock lock = new ReentrantLock();
333	<	for(int i = 1; i <= SIZE; i++) {
334	<	lock.lock();
335	<	assertEquals(i,lock.getHoldCount());
336	<	}
337	<	for(int i = SIZE; i > 0; i--) {
338	<	lock.unlock();
339	<	assertEquals(i-1,lock.getHoldCount());
340	<	}
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()      { 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()      { 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	>	// We shouldn't assume that nanoTime and currentTimeMillis
569	>	// use the same time source, so don't use nanoTime here.
570	>	java.util.Date delayedDate = delayedDate(timeoutMillis());
571	>	assertFalse(c.awaitUntil(delayedDate));
572	>	assertTrue(new java.util.Date().getTime() >= delayedDate.getTime());
573		lock.unlock();
574	<	}
445	<	catch (Exception ex) {
446	<	unexpectedException();
447	<	}
574	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
575		}
576
577		/**
578		* await returns when signalled
579		*/
580	<	public void testAwait() {
581	<	final ReentrantLock lock = new ReentrantLock();
580	>	public void testAwait()      { testAwait(false); }
581	>	public void testAwait_fair() { testAwait(true); }
582	>	public void testAwait(boolean fair) {
583	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
584		final Condition c = lock.newCondition();
585	<	Thread t = new Thread(new Runnable() {
586	<	public void run() {
587	<	try {
588	<	lock.lock();
589	<	c.await();
590	<	lock.unlock();
591	<	}
592	<	catch(InterruptedException e) {
593	<	threadUnexpectedException();
594	<	}
595	<	}
596	<	});
585	>	final CountDownLatch locked = new CountDownLatch(1);
586	>	Thread t = newStartedThread(new CheckedRunnable() {
587	>	public void realRun() throws InterruptedException {
588	>	lock.lock();
589	>	locked.countDown();
590	>	c.await();
591	>	lock.unlock();
592	>	}});
593	>
594	>	await(locked);
595	>	lock.lock();
596	>	assertHasWaiters(lock, c, t);
597	>	c.signal();
598	>	assertHasNoWaiters(lock, c);
599	>	assertTrue(t.isAlive());
600	>	lock.unlock();
601	>	awaitTermination(t);
602	>	}
603
604	+	/**
605	+	* hasWaiters throws NPE if null
606	+	*/
607	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
608	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
609	+	public void testHasWaitersNPE(boolean fair) {
610	+	final ReentrantLock lock = new ReentrantLock(fair);
611		try {
612	<	t.start();
613	<	Thread.sleep(SHORT_DELAY_MS);
614	<	lock.lock();
615	<	c.signal();
616	<	lock.unlock();
617	<	t.join(SHORT_DELAY_MS);
618	<	assertFalse(t.isAlive());
619	<	}
620	<	catch (Exception ex) {
621	<	unexpectedException();
622	<	}
612	>	lock.hasWaiters(null);
613	>	shouldThrow();
614	>	} catch (NullPointerException success) {}
615	>	}
616	>
617	>	/**
618	>	* getWaitQueueLength throws NPE if null
619	>	*/
620	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
621	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
622	>	public void testGetWaitQueueLengthNPE(boolean fair) {
623	>	final ReentrantLock lock = new ReentrantLock(fair);
624	>	try {
625	>	lock.getWaitQueueLength(null);
626	>	shouldThrow();
627	>	} catch (NullPointerException success) {}
628		}
629
630		/**
631	<	* hasWaiters throws IAE if not owned
631	>	* getWaitingThreads throws NPE if null
632		*/
633	<	public void testHasWaitersIAE() {
634	<	final ReentrantLock lock = new ReentrantLock();
635	<	final Condition c = (lock.newCondition());
636	<	final ReentrantLock lock2 = new ReentrantLock();
633	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
634	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
635	>	public void testGetWaitingThreadsNPE(boolean fair) {
636	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
637	>	try {
638	>	lock.getWaitingThreads(null);
639	>	shouldThrow();
640	>	} catch (NullPointerException success) {}
641	>	}
642	>
643	>	/**
644	>	* hasWaiters throws IllegalArgumentException if not owned
645	>	*/
646	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
647	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
648	>	public void testHasWaitersIAE(boolean fair) {
649	>	final ReentrantLock lock = new ReentrantLock(fair);
650	>	final Condition c = lock.newCondition();
651	>	final ReentrantLock lock2 = new ReentrantLock(fair);
652		try {
653		lock2.hasWaiters(c);
654		shouldThrow();
655	<	} catch (IllegalArgumentException success) {
494	<	} catch (Exception ex) {
495	<	unexpectedException();
496	<	}
655	>	} catch (IllegalArgumentException success) {}
656		}
657
658		/**
659	<	* hasWaiters throws IMSE if not locked
659	>	* hasWaiters throws IllegalMonitorStateException if not locked
660		*/
661	<	public void testHasWaitersIMSE() {
662	<	final ReentrantLock lock = new ReentrantLock();
663	<	final Condition c = (lock.newCondition());
661	>	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
662	>	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
663	>	public void testHasWaitersIMSE(boolean fair) {
664	>	final ReentrantLock lock = new ReentrantLock(fair);
665	>	final Condition c = lock.newCondition();
666		try {
667		lock.hasWaiters(c);
668		shouldThrow();
669	<	} catch (IllegalMonitorStateException success) {
509	<	} catch (Exception ex) {
510	<	unexpectedException();
511	<	}
669	>	} catch (IllegalMonitorStateException success) {}
670		}
671
514	–
672		/**
673	<	* getWaitQueueLength throws IAE if not owned
673	>	* getWaitQueueLength throws IllegalArgumentException if not owned
674		*/
675	<	public void testGetWaitQueueLengthIAE() {
676	<	final ReentrantLock lock = new ReentrantLock();
677	<	final Condition c = (lock.newCondition());
678	<	final ReentrantLock lock2 = new ReentrantLock();
675	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
676	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
677	>	public void testGetWaitQueueLengthIAE(boolean fair) {
678	>	final ReentrantLock lock = new ReentrantLock(fair);
679	>	final Condition c = lock.newCondition();
680	>	final ReentrantLock lock2 = new ReentrantLock(fair);
681		try {
682		lock2.getWaitQueueLength(c);
683		shouldThrow();
684	<	} catch (IllegalArgumentException success) {
526	<	} catch (Exception ex) {
527	<	unexpectedException();
528	<	}
684	>	} catch (IllegalArgumentException success) {}
685		}
686
687		/**
688	<	* getWaitQueueLength throws IMSE if not locked
688	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
689		*/
690	<	public void testGetWaitQueueLengthIMSE() {
691	<	final ReentrantLock lock = new ReentrantLock();
692	<	final Condition c = (lock.newCondition());
690	>	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
691	>	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
692	>	public void testGetWaitQueueLengthIMSE(boolean fair) {
693	>	final ReentrantLock lock = new ReentrantLock(fair);
694	>	final Condition c = lock.newCondition();
695		try {
696		lock.getWaitQueueLength(c);
697		shouldThrow();
698	<	} catch (IllegalMonitorStateException success) {
541	<	} catch (Exception ex) {
542	<	unexpectedException();
543	<	}
698	>	} catch (IllegalMonitorStateException success) {}
699		}
700
546	–
701		/**
702	<	* getWaitingThreads throws IAE if not owned
702	>	* getWaitingThreads throws IllegalArgumentException if not owned
703		*/
704	<	public void testGetWaitingThreadsIAE() {
705	<	final PublicReentrantLock lock = new PublicReentrantLock();
706	<	final Condition c = (lock.newCondition());
707	<	final PublicReentrantLock lock2 = new PublicReentrantLock();
704	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
705	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
706	>	public void testGetWaitingThreadsIAE(boolean fair) {
707	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
708	>	final Condition c = lock.newCondition();
709	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
710		try {
711		lock2.getWaitingThreads(c);
712		shouldThrow();
713	<	} catch (IllegalArgumentException success) {
558	<	} catch (Exception ex) {
559	<	unexpectedException();
560	<	}
713	>	} catch (IllegalArgumentException success) {}
714		}
715
716		/**
717	<	* getWaitingThreads throws IMSE if not locked
717	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
718		*/
719	<	public void testGetWaitingThreadsIMSE() {
720	<	final PublicReentrantLock lock = new PublicReentrantLock();
721	<	final Condition c = (lock.newCondition());
719	>	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
720	>	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
721	>	public void testGetWaitingThreadsIMSE(boolean fair) {
722	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
723	>	final Condition c = lock.newCondition();
724		try {
725		lock.getWaitingThreads(c);
726		shouldThrow();
727	<	} catch (IllegalMonitorStateException success) {
573	<	} catch (Exception ex) {
574	<	unexpectedException();
575	<	}
727	>	} catch (IllegalMonitorStateException success) {}
728		}
729
578	–
579	–
730		/**
731		* hasWaiters returns true when a thread is waiting, else false
732		*/
733	<	public void testHasWaiters() {
734	<	final ReentrantLock lock = new ReentrantLock();
733	>	public void testHasWaiters()      { testHasWaiters(false); }
734	>	public void testHasWaiters_fair() { testHasWaiters(true); }
735	>	public void testHasWaiters(boolean fair) {
736	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
737		final Condition c = lock.newCondition();
738	<	Thread t = new Thread(new Runnable() {
739	<	public void run() {
740	<	try {
741	<	lock.lock();
742	<	threadAssertFalse(lock.hasWaiters(c));
743	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
744	<	c.await();
745	<	lock.unlock();
746	<	}
747	<	catch(InterruptedException e) {
748	<	threadUnexpectedException();
749	<	}
750	<	}
751	<	});
752	<
753	<	try {
754	<	t.start();
755	<	Thread.sleep(SHORT_DELAY_MS);
756	<	lock.lock();
757	<	assertTrue(lock.hasWaiters(c));
758	<	assertEquals(1, lock.getWaitQueueLength(c));
759	<	c.signal();
760	<	lock.unlock();
609	<	Thread.sleep(SHORT_DELAY_MS);
610	<	lock.lock();
611	<	assertFalse(lock.hasWaiters(c));
612	<	assertEquals(0, lock.getWaitQueueLength(c));
613	<	lock.unlock();
614	<	t.join(SHORT_DELAY_MS);
615	<	assertFalse(t.isAlive());
616	<	}
617	<	catch (Exception ex) {
618	<	unexpectedException();
619	<	}
738	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
739	>	Thread t = newStartedThread(new CheckedRunnable() {
740	>	public void realRun() throws InterruptedException {
741	>	lock.lock();
742	>	assertHasNoWaiters(lock, c);
743	>	assertFalse(lock.hasWaiters(c));
744	>	pleaseSignal.countDown();
745	>	c.await();
746	>	assertHasNoWaiters(lock, c);
747	>	assertFalse(lock.hasWaiters(c));
748	>	lock.unlock();
749	>	}});
750	>
751	>	await(pleaseSignal);
752	>	lock.lock();
753	>	assertHasWaiters(lock, c, t);
754	>	assertTrue(lock.hasWaiters(c));
755	>	c.signal();
756	>	assertHasNoWaiters(lock, c);
757	>	assertFalse(lock.hasWaiters(c));
758	>	lock.unlock();
759	>	awaitTermination(t);
760	>	assertHasNoWaiters(lock, c);
761		}
762
763		/**
764		* getWaitQueueLength returns number of waiting threads
765		*/
766	<	public void testGetWaitQueueLength() {
767	<	final ReentrantLock lock = new ReentrantLock();
766	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
767	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
768	>	public void testGetWaitQueueLength(boolean fair) {
769	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
770		final Condition c = lock.newCondition();
771	<	Thread t1 = new Thread(new Runnable() {
772	<	public void run() {
773	<	try {
774	<	lock.lock();
775	<	threadAssertFalse(lock.hasWaiters(c));
776	<	threadAssertEquals(0, lock.getWaitQueueLength(c));
777	<	c.await();
778	<	lock.unlock();
779	<	}
780	<	catch(InterruptedException e) {
781	<	threadUnexpectedException();
782	<	}
783	<	}
784	<	});
785	<
786	<	Thread t2 = new Thread(new Runnable() {
787	<	public void run() {
788	<	try {
789	<	lock.lock();
790	<	threadAssertTrue(lock.hasWaiters(c));
791	<	threadAssertEquals(1, lock.getWaitQueueLength(c));
792	<	c.await();
793	<	lock.unlock();
794	<	}
795	<	catch(InterruptedException e) {
796	<	threadUnexpectedException();
797	<	}
798	<	}
799	<	});
771	>	final CountDownLatch locked1 = new CountDownLatch(1);
772	>	final CountDownLatch locked2 = new CountDownLatch(1);
773	>	Thread t1 = new Thread(new CheckedRunnable() {
774	>	public void realRun() throws InterruptedException {
775	>	lock.lock();
776	>	assertFalse(lock.hasWaiters(c));
777	>	assertEquals(0, lock.getWaitQueueLength(c));
778	>	locked1.countDown();
779	>	c.await();
780	>	lock.unlock();
781	>	}});
782	>
783	>	Thread t2 = new Thread(new CheckedRunnable() {
784	>	public void realRun() throws InterruptedException {
785	>	lock.lock();
786	>	assertTrue(lock.hasWaiters(c));
787	>	assertEquals(1, lock.getWaitQueueLength(c));
788	>	locked2.countDown();
789	>	c.await();
790	>	lock.unlock();
791	>	}});
792	>
793	>	lock.lock();
794	>	assertEquals(0, lock.getWaitQueueLength(c));
795	>	lock.unlock();
796	>
797	>	t1.start();
798	>	await(locked1);
799	>
800	>	lock.lock();
801	>	assertHasWaiters(lock, c, t1);
802	>	assertEquals(1, lock.getWaitQueueLength(c));
803	>	lock.unlock();
804	>
805	>	t2.start();
806	>	await(locked2);
807	>
808	>	lock.lock();
809	>	assertHasWaiters(lock, c, t1, t2);
810	>	assertEquals(2, lock.getWaitQueueLength(c));
811	>	c.signalAll();
812	>	assertHasNoWaiters(lock, c);
813	>	lock.unlock();
814
815	<	try {
816	<	t1.start();
817	<	Thread.sleep(SHORT_DELAY_MS);
818	<	t2.start();
662	<	Thread.sleep(SHORT_DELAY_MS);
663	<	lock.lock();
664	<	assertTrue(lock.hasWaiters(c));
665	<	assertEquals(2, lock.getWaitQueueLength(c));
666	<	c.signalAll();
667	<	lock.unlock();
668	<	Thread.sleep(SHORT_DELAY_MS);
669	<	lock.lock();
670	<	assertFalse(lock.hasWaiters(c));
671	<	assertEquals(0, lock.getWaitQueueLength(c));
672	<	lock.unlock();
673	<	t1.join(SHORT_DELAY_MS);
674	<	t2.join(SHORT_DELAY_MS);
675	<	assertFalse(t1.isAlive());
676	<	assertFalse(t2.isAlive());
677	<	}
678	<	catch (Exception ex) {
679	<	unexpectedException();
680	<	}
815	>	awaitTermination(t1);
816	>	awaitTermination(t2);
817	>
818	>	assertHasNoWaiters(lock, c);
819		}
820
821		/**
822		* getWaitingThreads returns only and all waiting threads
823		*/
824	<	public void testGetWaitingThreads() {
825	<	final PublicReentrantLock lock = new PublicReentrantLock();
824	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
825	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
826	>	public void testGetWaitingThreads(boolean fair) {
827	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
828		final Condition c = lock.newCondition();
829	<	Thread t1 = new Thread(new Runnable() {
830	<	public void run() {
831	<	try {
832	<	lock.lock();
833	<	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
834	<	c.await();
835	<	lock.unlock();
836	<	}
837	<	catch(InterruptedException e) {
838	<	threadUnexpectedException();
839	<	}
840	<	}
841	<	});
842	<
843	<	Thread t2 = new Thread(new Runnable() {
844	<	public void run() {
845	<	try {
846	<	lock.lock();
847	<	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
848	<	c.await();
849	<	lock.unlock();
850	<	}
851	<	catch(InterruptedException e) {
852	<	threadUnexpectedException();
853	<	}
854	<	}
855	<	});
856	<
857	<	try {
858	<	lock.lock();
859	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
860	<	lock.unlock();
861	<	t1.start();
862	<	Thread.sleep(SHORT_DELAY_MS);
863	<	t2.start();
864	<	Thread.sleep(SHORT_DELAY_MS);
865	<	lock.lock();
866	<	assertTrue(lock.hasWaiters(c));
867	<	assertTrue(lock.getWaitingThreads(c).contains(t1));
868	<	assertTrue(lock.getWaitingThreads(c).contains(t2));
869	<	c.signalAll();
870	<	lock.unlock();
871	<	Thread.sleep(SHORT_DELAY_MS);
872	<	lock.lock();
873	<	assertFalse(lock.hasWaiters(c));
874	<	assertTrue(lock.getWaitingThreads(c).isEmpty());
875	<	lock.unlock();
876	<	t1.join(SHORT_DELAY_MS);
877	<	t2.join(SHORT_DELAY_MS);
878	<	assertFalse(t1.isAlive());
739	<	assertFalse(t2.isAlive());
740	<	}
741	<	catch (Exception ex) {
742	<	unexpectedException();
743	<	}
829	>	final CountDownLatch locked1 = new CountDownLatch(1);
830	>	final CountDownLatch locked2 = new CountDownLatch(1);
831	>	Thread t1 = new Thread(new CheckedRunnable() {
832	>	public void realRun() throws InterruptedException {
833	>	lock.lock();
834	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
835	>	locked1.countDown();
836	>	c.await();
837	>	lock.unlock();
838	>	}});
839	>
840	>	Thread t2 = new Thread(new CheckedRunnable() {
841	>	public void realRun() throws InterruptedException {
842	>	lock.lock();
843	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
844	>	locked2.countDown();
845	>	c.await();
846	>	lock.unlock();
847	>	}});
848	>
849	>	lock.lock();
850	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
851	>	lock.unlock();
852	>
853	>	t1.start();
854	>	await(locked1);
855	>
856	>	lock.lock();
857	>	assertHasWaiters(lock, c, t1);
858	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
859	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
860	>	assertEquals(1, lock.getWaitingThreads(c).size());
861	>	lock.unlock();
862	>
863	>	t2.start();
864	>	await(locked2);
865	>
866	>	lock.lock();
867	>	assertHasWaiters(lock, c, t1, t2);
868	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
869	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
870	>	assertEquals(2, lock.getWaitingThreads(c).size());
871	>	c.signalAll();
872	>	assertHasNoWaiters(lock, c);
873	>	lock.unlock();
874	>
875	>	awaitTermination(t1);
876	>	awaitTermination(t2);
877	>
878	>	assertHasNoWaiters(lock, c);
879		}
880
746	–
747	–
881		/**
882	<	* awaitUninterruptibly doesn't abort on interrupt
883	<	*/
884	<	public void testAwaitUninterruptibly() {
885	<	final ReentrantLock lock = new ReentrantLock();
882	>	* awaitUninterruptibly is uninterruptible
883	>	*/
884	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
885	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
886	>	public void testAwaitUninterruptibly(boolean fair) {
887	>	final ReentrantLock lock = new ReentrantLock(fair);
888		final Condition c = lock.newCondition();
889	<	Thread t = new Thread(new Runnable() {
755	<	public void run() {
756	<	lock.lock();
757	<	c.awaitUninterruptibly();
758	<	lock.unlock();
759	<	}
760	<	});
889	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
890
891	<	try {
892	<	t.start();
893	<	Thread.sleep(SHORT_DELAY_MS);
894	<	t.interrupt();
895	<	lock.lock();
896	<	c.signal();
897	<	lock.unlock();
898	<	assert(t.isInterrupted());
899	<	t.join(SHORT_DELAY_MS);
900	<	assertFalse(t.isAlive());
901	<	}
902	<	catch (Exception ex) {
903	<	unexpectedException();
904	<	}
891	>	Thread t1 = newStartedThread(new CheckedRunnable() {
892	>	public void realRun() {
893	>	// Interrupt before awaitUninterruptibly
894	>	lock.lock();
895	>	pleaseInterrupt.countDown();
896	>	Thread.currentThread().interrupt();
897	>	c.awaitUninterruptibly();
898	>	assertTrue(Thread.interrupted());
899	>	lock.unlock();
900	>	}});
901	>
902	>	Thread t2 = newStartedThread(new CheckedRunnable() {
903	>	public void realRun() {
904	>	// Interrupt during awaitUninterruptibly
905	>	lock.lock();
906	>	pleaseInterrupt.countDown();
907	>	c.awaitUninterruptibly();
908	>	assertTrue(Thread.interrupted());
909	>	lock.unlock();
910	>	}});
911	>
912	>	await(pleaseInterrupt);
913	>	lock.lock();
914	>	lock.unlock();
915	>	t2.interrupt();
916	>
917	>	assertThreadStaysAlive(t1);
918	>	assertTrue(t2.isAlive());
919	>
920	>	lock.lock();
921	>	c.signalAll();
922	>	lock.unlock();
923	>
924	>	awaitTermination(t1);
925	>	awaitTermination(t2);
926		}
927
928		/**
929	<	* await is interruptible
930	<	*/
931	<	public void testAwait_Interrupt() {
932	<	final ReentrantLock lock = new ReentrantLock();
929	>	* await/awaitNanos/awaitUntil is interruptible
930	>	*/
931	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
932	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
933	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
934	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
935	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
936	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
937	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
938	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
939	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
940	>	final PublicReentrantLock lock =
941	>	new PublicReentrantLock(fair);
942		final Condition c = lock.newCondition();
943	<	Thread t = new Thread(new Runnable() {
944	<	public void run() {
945	<	try {
946	<	lock.lock();
947	<	c.await();
948	<	lock.unlock();
949	<	threadShouldThrow();
950	<	}
951	<	catch(InterruptedException success) {
952	<	}
953	<	}
954	<	});
955	<
956	<	try {
957	<	t.start();
958	<	Thread.sleep(SHORT_DELAY_MS);
959	<	t.interrupt();
960	<	t.join(SHORT_DELAY_MS);
961	<	assertFalse(t.isAlive());
962	<	}
963	<	catch (Exception ex) {
964	<	unexpectedException();
806	<	}
943	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
944	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
945	>	public void realRun() throws InterruptedException {
946	>	lock.lock();
947	>	assertLockedByMoi(lock);
948	>	assertHasNoWaiters(lock, c);
949	>	pleaseInterrupt.countDown();
950	>	try {
951	>	await(c, awaitMethod);
952	>	} finally {
953	>	assertLockedByMoi(lock);
954	>	assertHasNoWaiters(lock, c);
955	>	lock.unlock();
956	>	assertFalse(Thread.interrupted());
957	>	}
958	>	}});
959	>
960	>	await(pleaseInterrupt);
961	>	assertHasWaiters(lock, c, t);
962	>	t.interrupt();
963	>	awaitTermination(t);
964	>	assertNotLocked(lock);
965		}
966
967		/**
968	<	* awaitNanos is interruptible
968	>	* signalAll wakes up all threads
969		*/
970	<	public void testAwaitNanos_Interrupt() {
971	<	final ReentrantLock lock = new ReentrantLock();
970	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
971	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
972	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
973	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
974	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
975	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
976	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
977	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
978	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
979	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
980		final Condition c = lock.newCondition();
981	<	Thread t = new Thread(new Runnable() {
982	<	public void run() {
983	<	try {
984	<	lock.lock();
985	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
986	<	lock.unlock();
987	<	threadShouldThrow();
988	<	}
989	<	catch(InterruptedException success) {
990	<	}
991	<	}
992	<	});
993	<
994	<	try {
995	<	t.start();
996	<	Thread.sleep(SHORT_DELAY_MS);
997	<	t.interrupt();
998	<	t.join(SHORT_DELAY_MS);
999	<	assertFalse(t.isAlive());
1000	<	}
1001	<	catch (Exception ex) {
836	<	unexpectedException();
837	<	}
981	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
982	>	class Awaiter extends CheckedRunnable {
983	>	public void realRun() throws InterruptedException {
984	>	lock.lock();
985	>	pleaseSignal.countDown();
986	>	await(c, awaitMethod);
987	>	lock.unlock();
988	>	}
989	>	}
990	>
991	>	Thread t1 = newStartedThread(new Awaiter());
992	>	Thread t2 = newStartedThread(new Awaiter());
993	>
994	>	await(pleaseSignal);
995	>	lock.lock();
996	>	assertHasWaiters(lock, c, t1, t2);
997	>	c.signalAll();
998	>	assertHasNoWaiters(lock, c);
999	>	lock.unlock();
1000	>	awaitTermination(t1);
1001	>	awaitTermination(t2);
1002		}
1003
1004		/**
1005	<	* awaitUntil is interruptible
1006	<	*/
1007	<	public void testAwaitUntil_Interrupt() {
1008	<	final ReentrantLock lock = new ReentrantLock();
1005	>	* signal wakes up waiting threads in FIFO order
1006	>	*/
1007	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1008	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1009	>	public void testSignalWakesFifo(boolean fair) {
1010	>	final PublicReentrantLock lock =
1011	>	new PublicReentrantLock(fair);
1012		final Condition c = lock.newCondition();
1013	<	Thread t = new Thread(new Runnable() {
1014	<	public void run() {
1015	<	try {
1016	<	lock.lock();
1017	<	java.util.Date d = new java.util.Date();
1018	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
1019	<	lock.unlock();
1020	<	threadShouldThrow();
1021	<	}
1022	<	catch(InterruptedException success) {
1023	<	}
1024	<	}
1025	<	});
1026	<
1027	<	try {
1028	<	t.start();
1029	<	Thread.sleep(SHORT_DELAY_MS);
1030	<	t.interrupt();
1031	<	t.join(SHORT_DELAY_MS);
1032	<	assertFalse(t.isAlive());
1033	<	}
1034	<	catch (Exception ex) {
1035	<	unexpectedException();
1036	<	}
1013	>	final CountDownLatch locked1 = new CountDownLatch(1);
1014	>	final CountDownLatch locked2 = new CountDownLatch(1);
1015	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1016	>	public void realRun() throws InterruptedException {
1017	>	lock.lock();
1018	>	locked1.countDown();
1019	>	c.await();
1020	>	lock.unlock();
1021	>	}});
1022	>
1023	>	await(locked1);
1024	>
1025	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1026	>	public void realRun() throws InterruptedException {
1027	>	lock.lock();
1028	>	locked2.countDown();
1029	>	c.await();
1030	>	lock.unlock();
1031	>	}});
1032	>
1033	>	await(locked2);
1034	>
1035	>	lock.lock();
1036	>	assertHasWaiters(lock, c, t1, t2);
1037	>	assertFalse(lock.hasQueuedThreads());
1038	>	c.signal();
1039	>	assertHasWaiters(lock, c, t2);
1040	>	assertTrue(lock.hasQueuedThread(t1));
1041	>	assertFalse(lock.hasQueuedThread(t2));
1042	>	c.signal();
1043	>	assertHasNoWaiters(lock, c);
1044	>	assertTrue(lock.hasQueuedThread(t1));
1045	>	assertTrue(lock.hasQueuedThread(t2));
1046	>	lock.unlock();
1047	>	awaitTermination(t1);
1048	>	awaitTermination(t2);
1049		}
1050
1051		/**
1052	<	* signalAll wakes up all threads
1053	<	*/
1054	<	public void testSignalAll() {
1055	<	final ReentrantLock lock = new ReentrantLock();
1052	>	* await after multiple reentrant locking preserves lock count
1053	>	*/
1054	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1055	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1056	>	public void testAwaitLockCount(boolean fair) {
1057	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1058		final Condition c = lock.newCondition();
1059	<	Thread t1 = new Thread(new Runnable() {
1060	<	public void run() {
1061	<	try {
1062	<	lock.lock();
1063	<	c.await();
1064	<	lock.unlock();
1065	<	}
1066	<	catch(InterruptedException e) {
1067	<	threadUnexpectedException();
1068	<	}
1069	<	}
1070	<	});
1071	<
1072	<	Thread t2 = new Thread(new Runnable() {
1073	<	public void run() {
1074	<	try {
1075	<	lock.lock();
1076	<	c.await();
1077	<	lock.unlock();
1078	<	}
1079	<	catch(InterruptedException e) {
1080	<	threadUnexpectedException();
1081	<	}
1082	<	}
1083	<	});
1084	<
1085	<	try {
1086	<	t1.start();
1087	<	t2.start();
1088	<	Thread.sleep(SHORT_DELAY_MS);
1089	<	lock.lock();
1090	<	c.signalAll();
1091	<	lock.unlock();
1092	<	t1.join(SHORT_DELAY_MS);
1093	<	t2.join(SHORT_DELAY_MS);
1094	<	assertFalse(t1.isAlive());
914	<	assertFalse(t2.isAlive());
915	<	}
916	<	catch (Exception ex) {
917	<	unexpectedException();
918	<	}
1059	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1060	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1061	>	public void realRun() throws InterruptedException {
1062	>	lock.lock();
1063	>	assertLockedByMoi(lock);
1064	>	assertEquals(1, lock.getHoldCount());
1065	>	pleaseSignal.countDown();
1066	>	c.await();
1067	>	assertLockedByMoi(lock);
1068	>	assertEquals(1, lock.getHoldCount());
1069	>	lock.unlock();
1070	>	}});
1071	>
1072	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1073	>	public void realRun() throws InterruptedException {
1074	>	lock.lock();
1075	>	lock.lock();
1076	>	assertLockedByMoi(lock);
1077	>	assertEquals(2, lock.getHoldCount());
1078	>	pleaseSignal.countDown();
1079	>	c.await();
1080	>	assertLockedByMoi(lock);
1081	>	assertEquals(2, lock.getHoldCount());
1082	>	lock.unlock();
1083	>	lock.unlock();
1084	>	}});
1085	>
1086	>	await(pleaseSignal);
1087	>	lock.lock();
1088	>	assertHasWaiters(lock, c, t1, t2);
1089	>	assertEquals(1, lock.getHoldCount());
1090	>	c.signalAll();
1091	>	assertHasNoWaiters(lock, c);
1092	>	lock.unlock();
1093	>	awaitTermination(t1);
1094	>	awaitTermination(t2);
1095		}
1096
1097		/**
1098		* A serialized lock deserializes as unlocked
1099		*/
1100	<	public void testSerialization() {
1101	<	ReentrantLock l = new ReentrantLock();
1102	<	l.lock();
1103	<	l.unlock();
1104	<
1105	<	try {
1106	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1107	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1108	<	out.writeObject(l);
1109	<	out.close();
1110	<
1111	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1112	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1113	<	ReentrantLock r = (ReentrantLock) in.readObject();
1114	<	r.lock();
1115	<	r.unlock();
1116	<	} catch(Exception e){
1117	<	e.printStackTrace();
1118	<	unexpectedException();
1119	<	}
1100	>	public void testSerialization()      { testSerialization(false); }
1101	>	public void testSerialization_fair() { testSerialization(true); }
1102	>	public void testSerialization(boolean fair) {
1103	>	ReentrantLock lock = new ReentrantLock(fair);
1104	>	lock.lock();
1105	>
1106	>	ReentrantLock clone = serialClone(lock);
1107	>	assertEquals(lock.isFair(), clone.isFair());
1108	>	assertTrue(lock.isLocked());
1109	>	assertFalse(clone.isLocked());
1110	>	assertEquals(1, lock.getHoldCount());
1111	>	assertEquals(0, clone.getHoldCount());
1112	>	clone.lock();
1113	>	clone.lock();
1114	>	assertTrue(clone.isLocked());
1115	>	assertEquals(2, clone.getHoldCount());
1116	>	assertEquals(1, lock.getHoldCount());
1117	>	clone.unlock();
1118	>	clone.unlock();
1119	>	assertTrue(lock.isLocked());
1120	>	assertFalse(clone.isLocked());
1121		}
1122
1123	+	/**
1124	+	* toString indicates current lock state
1125	+	*/
1126	+	public void testToString()      { testToString(false); }
1127	+	public void testToString_fair() { testToString(true); }
1128	+	public void testToString(boolean fair) {
1129	+	ReentrantLock lock = new ReentrantLock(fair);
1130	+	assertTrue(lock.toString().contains("Unlocked"));
1131	+	lock.lock();
1132	+	assertTrue(lock.toString().contains("Locked"));
1133	+	lock.unlock();
1134	+	assertTrue(lock.toString().contains("Unlocked"));
1135	+	}
1136		}

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