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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.3 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.63 by jsr166, Fri Jul 3 05:48:30 2015 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
9	<	import java.util.concurrent.locks.*;
10	<	import java.util.concurrent.*;
11	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	public class ReentrantLockTest extends TestCase {
12	<	static int HOLD_COUNT_TEST_LIMIT = 20;
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		}
19	–
27		public static Test suite() {
28	<	return new TestSuite(ReentrantLockTest.class);
28	>	return new TestSuite(ReentrantLockTest.class);
29		}
30
31	<	private static long SHORT_DELAY_MS = 100;
32	<	private static long MEDIUM_DELAY_MS = 1000;
33	<	private static long LONG_DELAY_MS = 10000;
34	<
35	<	/*
36	<	* Unlocks an unlocked lock, throws Illegal Monitor State
37	<	*
38	<	*/
32	<
33	<	public void testIllegalMonitorStateException(){
34	<	ReentrantLock rl = new ReentrantLock();
35	<	try{
36	<	rl.unlock();
37	<	fail("Should of thown Illegal Monitor State Exception");
38	<
39	<	} catch(IllegalMonitorStateException success){}
40	<
41	<
42	<	}
43	<
44	<	/*
45	<	* makes a lock, locks it, tries to aquire the lock in another thread
46	<	* interrupts that thread and waits for an interrupted Exception to
47	<	* be thrown.
48	<	*/
49	<
50	<	public void testInterruptedException(){
51	<	final ReentrantLock lock = new ReentrantLock();
52	<	lock.lock();
53	<	Thread t = new Thread(new Runnable() {
54	<	public void run(){
55	<	try{
56	<	lock.lockInterruptibly();
57	<	fail("should throw");
58	<	} catch(InterruptedException success){}
59	<	}
60	<	});
61	<	t.start();
62	<	t.interrupt();
63	<	lock.unlock();
64	<	}
65	<
66	<	/*
67	<	* tests for interrupted exception on a timed wait
68	<	*
69	<	*/
70	<
71	<
72	<	public void testInterruptedException2(){
73	<	final ReentrantLock lock = new ReentrantLock();
74	<	lock.lock();
75	<	Thread t = new Thread(new Runnable() {
76	<	public void run(){
77	<	try{
78	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
79	<	fail("should throw");
80	<	} catch(InterruptedException success){}
81	<	}
82	<	});
83	<	t.start();
84	<	t.interrupt();
85	<	}
86	<
87	<
88	<	public void testTryLockWhenLocked() {
89	<	final ReentrantLock lock = new ReentrantLock();
90	<	lock.lock();
91	<	Thread t = new Thread(new Runnable() {
92	<	public void run(){
93	<	assertFalse(lock.tryLock());
94	<	}
95	<	});
96	<	try {
97	<	t.start();
98	<	t.join();
99	<	lock.unlock();
100	<	} catch(Exception e){
101	<	fail("unexpected exception");
102	<	}
103	<	}
104	<
105	<	public void testTryLock_Timeout(){
106	<	final ReentrantLock lock = new ReentrantLock();
107	<	lock.lock();
108	<	Thread t = new Thread(new Runnable() {
109	<	public void run(){
110	<	try {
111	<	assertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
112	<	} catch (Exception ex) {
113	<	fail("unexpected exception");
114	<	}
115	<	}
116	<	});
117	<	try {
118	<	t.start();
119	<	t.join();
120	<	lock.unlock();
121	<	} catch(Exception e){
122	<	fail("unexpected exception");
123	<	}
124	<	}
125	<
126	<	public void testGetHoldCount() {
127	<	ReentrantLock lock = new ReentrantLock();
128	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
129	<	lock.lock();
130	<	assertEquals(i,lock.getHoldCount());
131	<	}
132	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
133	<	lock.unlock();
134	<	assertEquals(i-1,lock.getHoldCount());
135	<	}
136	<	}
137	<
138	<
139	<
140	<
141	<	public void testIsLocked() {
142	<	final ReentrantLock lock = new ReentrantLock();
143	<	lock.lock();
144	<	assertTrue(lock.isLocked());
145	<	lock.unlock();
146	<	assertFalse(lock.isLocked());
147	<	Thread t = new Thread(new Runnable() {
148	<	public void run() {
149	<	lock.lock();
150	<	try {
151	<	Thread.sleep(SHORT_DELAY_MS * 2);
152	<	}
153	<	catch(Exception e) {}
154	<	lock.unlock();
155	<	}
156	<	});
157	<	try{
158	<	t.start();
159	<	Thread.sleep(SHORT_DELAY_MS);
160	<	assertTrue(lock.isLocked());
161	<	t.join();
162	<	assertFalse(lock.isLocked());
163	<	} catch(Exception e){
164	<	fail("unexpected exception");
31	>	/**
32	>	* A checked runnable calling lockInterruptibly
33	>	*/
34	>	class InterruptibleLockRunnable extends CheckedRunnable {
35	>	final ReentrantLock lock;
36	>	InterruptibleLockRunnable(ReentrantLock lock) { this.lock = lock; }
37	>	public void realRun() throws InterruptedException {
38	>	lock.lockInterruptibly();
39		}
40		}
41
42	<
43	<	public void testLockInterruptibly() {
44	<	final ReentrantLock lock = new ReentrantLock();
45	<	try {
42	>	/**
43	>	* A checked runnable calling lockInterruptibly that expects to be
44	>	* interrupted
45	>	*/
46	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
47	>	final ReentrantLock lock;
48	>	InterruptedLockRunnable(ReentrantLock lock) { this.lock = lock; }
49	>	public void realRun() throws InterruptedException {
50		lock.lockInterruptibly();
173	–	} catch(Exception e) {
174	–	fail("unexpected exception");
175	–	}
176	–	Thread t = new Thread(new Runnable() {
177	–	public void run() {
178	–	try {
179	–	lock.lockInterruptibly();
180	–	fail("should throw");
181	–	}
182	–	catch(InterruptedException e) {}
183	–	}
184	–	});
185	–	try {
186	–	t.start();
187	–	t.interrupt();
188	–	assertTrue(lock.isLocked());
189	–	assertTrue(lock.isHeldByCurrentThread());
190	–	t.join();
191	–	} catch(Exception e){
192	–	fail("unexpected exception");
51		}
52		}
53
54	<	public void testAwait_IllegalMonitor() {
55	<	final ReentrantLock lock = new ReentrantLock();
56	<	final Condition c = lock.newCondition();
57	<	try {
58	<	c.await();
59	<	fail("should throw");
54	>	/**
55	>	* Subclass to expose protected methods
56	>	*/
57	>	static class PublicReentrantLock extends ReentrantLock {
58	>	PublicReentrantLock() { super(); }
59	>	PublicReentrantLock(boolean fair) { super(fair); }
60	>	public Thread getOwner() {
61	>	return super.getOwner();
62		}
63	<	catch (IllegalMonitorStateException success) {
63	>	public Collection<Thread> getQueuedThreads() {
64	>	return super.getQueuedThreads();
65		}
66	<	catch (Exception ex) {
67	<	fail("should throw IMSE");
66	>	public Collection<Thread> getWaitingThreads(Condition c) {
67	>	return super.getWaitingThreads(c);
68		}
69		}
70
71	<	public void testSignal_IllegalMonitor() {
72	<	final ReentrantLock lock = new ReentrantLock();
73	<	final Condition c = lock.newCondition();
74	<	try {
75	<	c.signal();
76	<	fail("should throw");
77	<	}
78	<	catch (IllegalMonitorStateException success) {
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	<	catch (Exception ex) {
92	<	fail("should throw IMSE");
91	>	assertTrue(t.isAlive());
92	>	assertNotSame(t, lock.getOwner());
93	>	}
94	>
95	>	/**
96	>	* Checks that lock is not locked.
97	>	*/
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	>	* Checks that lock is locked by the given thread.
107	>	*/
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	>	* Checks that lock is locked by the current thread.
119	>	*/
120	>	void assertLockedByMoi(PublicReentrantLock lock) {
121	>	assertLockedBy(lock, Thread.currentThread());
122	>	}
123	>
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	>	* 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	>	* 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	<	public void testAwaitNanos_Timeout() {
176	<	final ReentrantLock lock = new ReentrantLock();
177	<	final Condition c = lock.newCondition();
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 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 {
228	–	lock.lock();
229	–	long t = c.awaitNanos(100);
230	–	assertTrue(t <= 0);
214		lock.unlock();
215	<	}
216	<	catch (Exception ex) {
234	<	fail("unexpected exception");
235	<	}
215	>	shouldThrow();
216	>	} catch (IllegalMonitorStateException success) {}
217		}
218
219	<	public void testAwait_Timeout() {
220	<	final ReentrantLock lock = new ReentrantLock();
221	<	final Condition c = lock.newCondition();
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()      { 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	>	* getQueueLength reports number of waiting threads
262	>	*/
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	+	lock.hasQueuedThread(null);
294	+	shouldThrow();
295	+	} catch (NullPointerException success) {}
296	+	}
297	+
298	+	/**
299	+	* hasQueuedThread reports whether a thread is queued
300	+	*/
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	+	* getQueuedThreads includes waiting threads
330	+	*/
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	+
415	+	/**
416	+	* getHoldCount returns number of recursive holds
417	+	*/
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	<	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
244	<	lock.unlock();
424	>	assertEquals(i, lock.getHoldCount());
425		}
426	<	catch (Exception ex) {
427	<	fail("unexpected exception");
426	>	for (int i = SIZE; i > 0; i--) {
427	>	lock.unlock();
428	>	assertEquals(i - 1, lock.getHoldCount());
429		}
430		}
431
432	<	public void testAwaitUntil_Timeout() {
433	<	final ReentrantLock lock = new ReentrantLock();
434	<	final Condition c = lock.newCondition();
432	>	/**
433	>	* isLocked is true when locked and false when not
434	>	*/
435	>	public void testIsLocked()      { testIsLocked(false); }
436	>	public void testIsLocked_fair() { testIsLocked(true); }
437	>	public void testIsLocked(boolean fair) {
438		try {
439	+	final ReentrantLock lock = new ReentrantLock(fair);
440	+	assertFalse(lock.isLocked());
441	+	lock.lock();
442	+	assertTrue(lock.isLocked());
443		lock.lock();
444	<	java.util.Date d = new java.util.Date();
257	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
444	>	assertTrue(lock.isLocked());
445		lock.unlock();
446	<	}
447	<	catch (Exception ex) {
448	<	fail("unexpected exception");
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 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	>	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_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	>	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	<	public void testAwait() {
507	<	final ReentrantLock lock = new ReentrantLock();
506	>	/**
507	>	* Calling signal without holding lock throws IllegalMonitorStateException
508	>	*/
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	<	Thread t = new Thread(new Runnable() {
515	<	public void run() {
516	<	try {
517	<	lock.lock();
518	<	c.await();
273	<	lock.unlock();
274	<	}
275	<	catch(InterruptedException e) {
276	<	fail("unexpected exception");
277	<	}
278	<	}
279	<	});
514	>	try {
515	>	c.signal();
516	>	shouldThrow();
517	>	} catch (IllegalMonitorStateException success) {}
518	>	}
519
520	+	/**
521	+	* awaitNanos without a signal times out
522	+	*/
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	<	t.start();
528	<	Thread.sleep(SHORT_DELAY_MS);
527	>	final ReentrantLock lock = new ReentrantLock(fair);
528	>	final Condition c = lock.newCondition();
529		lock.lock();
530	<	c.signal();
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	<	t.join(SHORT_DELAY_MS);
288	<	assertFalse(t.isAlive());
289	<	}
290	<	catch (Exception ex) {
291	<	fail("unexpected exception");
292	<	}
537	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
538		}
539
540	<	public void testAwaitUninterruptibly() {
541	<	final ReentrantLock lock = new ReentrantLock();
542	<	final Condition c = lock.newCondition();
543	<	Thread t = new Thread(new Runnable() {
544	<	public void run() {
545	<	lock.lock();
546	<	c.awaitUninterruptibly();
547	<	lock.unlock();
548	<	}
549	<	});
540	>	/**
541	>	* timed await without a signal times out
542	>	*/
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	>	long startTime = System.nanoTime();
551	>	long timeoutMillis = 10;
552	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
553	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
554	>	lock.unlock();
555	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
556	>	}
557
558	+	/**
559	+	* awaitUntil without a signal times out
560	+	*/
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	<	t.start();
566	<	Thread.sleep(SHORT_DELAY_MS);
309	<	t.interrupt();
565	>	final ReentrantLock lock = new ReentrantLock(fair);
566	>	final Condition c = lock.newCondition();
567		lock.lock();
568	<	c.signal();
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	<	t.join(SHORT_DELAY_MS);
314	<	assertFalse(t.isAlive());
315	<	}
316	<	catch (Exception ex) {
317	<	fail("unexpected exception");
318	<	}
574	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
575		}
576
577	<	public void testAwait_Interrupt() {
578	<	final ReentrantLock lock = new ReentrantLock();
577	>	/**
578	>	* await returns when signalled
579	>	*/
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	<	fail("should throw");
592	<	}
593	<	catch(InterruptedException success) {
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	<	t.interrupt();
615	<	t.join(SHORT_DELAY_MS);
616	<	assertFalse(t.isAlive());
617	<	}
618	<	catch (Exception ex) {
619	<	fail("unexpected exception");
620	<	}
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	<	public void testAwaitNanos_Interrupt() {
631	<	final ReentrantLock lock = new ReentrantLock();
630	>	/**
631	>	* getWaitingThreads throws NPE if null
632	>	*/
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	<	Thread t = new Thread(new Runnable() {
652	<	public void run() {
653	<	try {
654	<	lock.lock();
655	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
357	<	lock.unlock();
358	<	fail("should throw");
359	<	}
360	<	catch(InterruptedException success) {
361	<	}
362	<	}
363	<	});
364	<
365	<	try {
366	<	t.start();
367	<	Thread.sleep(SHORT_DELAY_MS);
368	<	t.interrupt();
369	<	t.join(SHORT_DELAY_MS);
370	<	assertFalse(t.isAlive());
371	<	}
372	<	catch (Exception ex) {
373	<	fail("unexpected exception");
374	<	}
651	>	final ReentrantLock lock2 = new ReentrantLock(fair);
652	>	try {
653	>	lock2.hasWaiters(c);
654	>	shouldThrow();
655	>	} catch (IllegalArgumentException success) {}
656		}
657
658	<	public void testAwaitUntil_Interrupt() {
659	<	final ReentrantLock lock = new ReentrantLock();
660	<	final Condition c = lock.newCondition();
661	<	Thread t = new Thread(new Runnable() {
662	<	public void run() {
663	<	try {
664	<	lock.lock();
665	<	java.util.Date d = new java.util.Date();
666	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
667	<	lock.unlock();
668	<	fail("should throw");
669	<	}
670	<	catch(InterruptedException success) {
390	<	}
391	<	}
392	<	});
658	>	/**
659	>	* hasWaiters throws IllegalMonitorStateException if not locked
660	>	*/
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) {}
670	>	}
671
672	+	/**
673	+	* getWaitQueueLength throws IllegalArgumentException if not owned
674	+	*/
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	<	t.start();
683	<	Thread.sleep(SHORT_DELAY_MS);
684	<	t.interrupt();
398	<	t.join(SHORT_DELAY_MS);
399	<	assertFalse(t.isAlive());
400	<	}
401	<	catch (Exception ex) {
402	<	fail("unexpected exception");
403	<	}
682	>	lock2.getWaitQueueLength(c);
683	>	shouldThrow();
684	>	} catch (IllegalArgumentException success) {}
685		}
686
687	<	public void testSignalAll() {
688	<	final ReentrantLock lock = new ReentrantLock();
687	>	/**
688	>	* getWaitQueueLength throws IllegalMonitorStateException if not locked
689	>	*/
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	<	Thread t1 = new Thread(new Runnable() {
696	<	public void run() {
697	<	try {
698	<	lock.lock();
699	<	c.await();
414	<	lock.unlock();
415	<	}
416	<	catch(InterruptedException e) {
417	<	fail("unexpected exception");
418	<	}
419	<	}
420	<	});
421	<
422	<	Thread t2 = new Thread(new Runnable() {
423	<	public void run() {
424	<	try {
425	<	lock.lock();
426	<	c.await();
427	<	lock.unlock();
428	<	}
429	<	catch(InterruptedException e) {
430	<	fail("unexpected exception");
431	<	}
432	<	}
433	<	});
695	>	try {
696	>	lock.getWaitQueueLength(c);
697	>	shouldThrow();
698	>	} catch (IllegalMonitorStateException success) {}
699	>	}
700
701	+	/**
702	+	* getWaitingThreads throws IllegalArgumentException if not owned
703	+	*/
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	<	t1.start();
712	<	t2.start();
713	<	Thread.sleep(SHORT_DELAY_MS);
439	<	lock.lock();
440	<	c.signalAll();
441	<	lock.unlock();
442	<	t1.join(SHORT_DELAY_MS);
443	<	t2.join(SHORT_DELAY_MS);
444	<	assertFalse(t1.isAlive());
445	<	assertFalse(t2.isAlive());
446	<	}
447	<	catch (Exception ex) {
448	<	fail("unexpected exception");
449	<	}
711	>	lock2.getWaitingThreads(c);
712	>	shouldThrow();
713	>	} catch (IllegalArgumentException success) {}
714		}
715
716	<	public void testSerialization() {
717	<	ReentrantLock l = new ReentrantLock();
718	<	l.lock();
719	<	l.unlock();
720	<
721	<	try {
722	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
723	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
724	<	out.writeObject(l);
725	<	out.close();
726	<
727	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
728	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
729	<	ReentrantLock r = (ReentrantLock) in.readObject();
730	<	r.lock();
731	<	r.unlock();
732	<	} catch(Exception e){
733	<	e.printStackTrace();
734	<	fail("unexpected exception");
735	<	}
716	>	/**
717	>	* getWaitingThreads throws IllegalMonitorStateException if not locked
718	>	*/
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) {}
728	>	}
729	>
730	>	/**
731	>	* hasWaiters returns true when a thread is waiting, else false
732	>	*/
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	>	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()      { 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	>	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	>	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()      { 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	+	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	+
881	+	/**
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	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
890	+
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/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	+	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	+	* signalAll wakes up all threads
969	+	*/
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	+	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	+	* 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	+	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	+	* 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	+	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()      { 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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