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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 2003 UTC vs.
Revision 1.62 by jsr166, Fri Jul 3 01:25:15 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.*;
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		}
18	–
27		public static Test suite() {
28	<	return new TestSuite(ReentrantLockTest.class);
28	>	return new TestSuite(ReentrantLockTest.class);
29	>	}
30	>
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	>	* 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();
51	>	}
52	>	}
53	>
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	>	public Collection<Thread> getQueuedThreads() {
64	>	return super.getQueuedThreads();
65	>	}
66	>	public Collection<Thread> getWaitingThreads(Condition c) {
67	>	return super.getWaitingThreads(c);
68	>	}
69	>	}
70	>
71	>	/**
72	>	* Releases write lock, checking that it had a hold count of 1.
73	>	*/
74	>	void releaseLock(PublicReentrantLock lock) {
75	>	assertLockedByMoi(lock);
76	>	lock.unlock();
77	>	assertFalse(lock.isHeldByCurrentThread());
78	>	assertNotLocked(lock);
79	>	}
80	>
81	>	/**
82	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
83	>	*/
84	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
85	>	long startTime = System.nanoTime();
86	>	while (!lock.hasQueuedThread(t)) {
87	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
88	>	throw new AssertionFailedError("timed out");
89	>	Thread.yield();
90	>	}
91	>	assertTrue(t.isAlive());
92	>	assertNotSame(t, lock.getOwner());
93	>	}
94	>
95	>	/**
96	>	* 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	<	private static long SHORT_DELAY_MS = 100;
176	<	private static long MEDIUM_DELAY_MS = 1000;
177	<	private static long LONG_DELAY_MS = 10000;
178	<
179	<	/*
180	<	* Unlocks an unlocked lock, throws Illegal Monitor State
181	<	*
182	<	*/
183	<
184	<	public void testIllegalMonitorStateException(){
185	<	ReentrantLock rl = new ReentrantLock();
186	<	try{
187	<	rl.unlock();
188	<	fail("Should of thown Illegal Monitor State Exception");
189	<
190	<	}catch(IllegalMonitorStateException sucess){}
191	<
192	<
193	<	}
194	<
195	<	/*
196	<	* makes a lock, locks it, tries to aquire the lock in another thread
197	<	* interrupts that thread and waits for an interrupted Exception to
198	<	* be thrown.
199	<	*/
200	<
201	<	public void testInterruptedException(){
202	<	final ReentrantLock lock = new ReentrantLock();
203	<	lock.lock();
204	<	Thread t = new Thread(new Runnable() {
205	<	public void run(){
206	<	try{
207	<	lock.lockInterruptibly();
208	<	fail("should throw");
209	<	}catch(InterruptedException sucess){}
210	<	}
211	<	});
212	<	t.start();
213	<	t.interrupt();
214	<	lock.unlock();
215	<	}
216	<
217	<	/*
218	<	* tests for interrupted exception on a timed wait
219	<	*
220	<	*/
221	<
222	<
223	<	public void testInterruptedException2(){
224	<	final ReentrantLock lock = new ReentrantLock();
225	<	lock.lock();
226	<	Thread t = new Thread(new Runnable() {
227	<	public void run(){
228	<	try{
229	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
230	<	fail("should throw");
231	<	}catch(InterruptedException sucess){}
232	<	}
233	<	});
234	<	t.start();
235	<	t.interrupt();
236	<	}
237	<
238	<
239	<	public void testGetHoldCount() {
240	<	ReentrantLock lock = new ReentrantLock();
241	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
242	<	lock.lock();
243	<	assertEquals(i,lock.getHoldCount());
244	<	}
245	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
246	<	lock.unlock();
247	<	assertEquals(i-1,lock.getHoldCount());
248	<	}
249	<	}
250	<
251	<
252	<
253	<
254	<	public void testIsLocked() {
255	<	final ReentrantLock lock = new ReentrantLock();
256	<	lock.lock();
257	<	assertTrue(lock.isLocked());
258	<	lock.unlock();
259	<	assertFalse(lock.isLocked());
260	<	Thread t = new Thread(new Runnable() {
261	<	public void run() {
262	<	lock.lock();
263	<	try {
264	<	Thread.sleep(SHORT_DELAY_MS * 2);
265	<	}
266	<	catch(Exception e) {}
267	<	lock.unlock();
268	<	}
269	<	});
270	<	try{
271	<	t.start();
272	<	Thread.sleep(SHORT_DELAY_MS);
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 {
214	>	lock.unlock();
215	>	shouldThrow();
216	>	} catch (IllegalMonitorStateException success) {}
217	>	}
218	>
219	>	/**
220	>	* tryLock on an unlocked lock succeeds
221	>	*/
222	>	public void testTryLock()      { testTryLock(false); }
223	>	public void testTryLock_fair() { testTryLock(true); }
224	>	public void testTryLock(boolean fair) {
225	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
226	>	assertTrue(lock.tryLock());
227	>	assertLockedByMoi(lock);
228	>	assertTrue(lock.tryLock());
229	>	assertLockedByMoi(lock);
230	>	lock.unlock();
231	>	releaseLock(lock);
232	>	}
233	>
234	>	/**
235	>	* hasQueuedThreads reports whether there are waiting threads
236	>	*/
237	>	public void testHasQueuedThreads()      { 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	>	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	>
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	<	t.join();
443	>	lock.lock();
444	>	assertTrue(lock.isLocked());
445	>	lock.unlock();
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 e){
465	<	fail("unexpected exception");
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	+	/**
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	+	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	+	final ReentrantLock lock = new ReentrantLock(fair);
528	+	final Condition c = lock.newCondition();
529	+	lock.lock();
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	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
538	+	}
539	+
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	+	final ReentrantLock lock = new ReentrantLock(fair);
566	+	final Condition c = lock.newCondition();
567	+	lock.lock();
568	+	long startTime = System.nanoTime();
569	+	assertFalse(c.awaitUntil(delayedDate(timeoutMillis())));
570	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
571	+	lock.unlock();
572	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
573	+	}
574	+
575	+	/**
576	+	* await returns when signalled
577	+	*/
578	+	public void testAwait()      { testAwait(false); }
579	+	public void testAwait_fair() { testAwait(true); }
580	+	public void testAwait(boolean fair) {
581	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
582	+	final Condition c = lock.newCondition();
583	+	final CountDownLatch locked = new CountDownLatch(1);
584	+	Thread t = newStartedThread(new CheckedRunnable() {
585	+	public void realRun() throws InterruptedException {
586	+	lock.lock();
587	+	locked.countDown();
588	+	c.await();
589	+	lock.unlock();
590	+	}});
591	+
592	+	await(locked);
593	+	lock.lock();
594	+	assertHasWaiters(lock, c, t);
595	+	c.signal();
596	+	assertHasNoWaiters(lock, c);
597	+	assertTrue(t.isAlive());
598	+	lock.unlock();
599	+	awaitTermination(t);
600	+	}
601	+
602	+	/**
603	+	* hasWaiters throws NPE if null
604	+	*/
605	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
606	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
607	+	public void testHasWaitersNPE(boolean fair) {
608	+	final ReentrantLock lock = new ReentrantLock(fair);
609	+	try {
610	+	lock.hasWaiters(null);
611	+	shouldThrow();
612	+	} catch (NullPointerException success) {}
613	+	}
614	+
615	+	/**
616	+	* getWaitQueueLength throws NPE if null
617	+	*/
618	+	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
619	+	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
620	+	public void testGetWaitQueueLengthNPE(boolean fair) {
621	+	final ReentrantLock lock = new ReentrantLock(fair);
622	+	try {
623	+	lock.getWaitQueueLength(null);
624	+	shouldThrow();
625	+	} catch (NullPointerException success) {}
626	+	}
627	+
628	+	/**
629	+	* getWaitingThreads throws NPE if null
630	+	*/
631	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
632	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
633	+	public void testGetWaitingThreadsNPE(boolean fair) {
634	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
635	+	try {
636	+	lock.getWaitingThreads(null);
637	+	shouldThrow();
638	+	} catch (NullPointerException success) {}
639	+	}
640	+
641	+	/**
642	+	* hasWaiters throws IllegalArgumentException if not owned
643	+	*/
644	+	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
645	+	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
646	+	public void testHasWaitersIAE(boolean fair) {
647	+	final ReentrantLock lock = new ReentrantLock(fair);
648	+	final Condition c = lock.newCondition();
649	+	final ReentrantLock lock2 = new ReentrantLock(fair);
650	+	try {
651	+	lock2.hasWaiters(c);
652	+	shouldThrow();
653	+	} catch (IllegalArgumentException success) {}
654	+	}
655	+
656	+	/**
657	+	* hasWaiters throws IllegalMonitorStateException if not locked
658	+	*/
659	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
660	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
661	+	public void testHasWaitersIMSE(boolean fair) {
662	+	final ReentrantLock lock = new ReentrantLock(fair);
663	+	final Condition c = lock.newCondition();
664	+	try {
665	+	lock.hasWaiters(c);
666	+	shouldThrow();
667	+	} catch (IllegalMonitorStateException success) {}
668	+	}
669	+
670	+	/**
671	+	* getWaitQueueLength throws IllegalArgumentException if not owned
672	+	*/
673	+	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
674	+	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
675	+	public void testGetWaitQueueLengthIAE(boolean fair) {
676	+	final ReentrantLock lock = new ReentrantLock(fair);
677	+	final Condition c = lock.newCondition();
678	+	final ReentrantLock lock2 = new ReentrantLock(fair);
679	+	try {
680	+	lock2.getWaitQueueLength(c);
681	+	shouldThrow();
682	+	} catch (IllegalArgumentException success) {}
683	+	}
684	+
685	+	/**
686	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
687	+	*/
688	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
689	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
690	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
691	+	final ReentrantLock lock = new ReentrantLock(fair);
692	+	final Condition c = lock.newCondition();
693	+	try {
694	+	lock.getWaitQueueLength(c);
695	+	shouldThrow();
696	+	} catch (IllegalMonitorStateException success) {}
697	+	}
698	+
699	+	/**
700	+	* getWaitingThreads throws IllegalArgumentException if not owned
701	+	*/
702	+	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
703	+	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
704	+	public void testGetWaitingThreadsIAE(boolean fair) {
705	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
706	+	final Condition c = lock.newCondition();
707	+	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
708	+	try {
709	+	lock2.getWaitingThreads(c);
710	+	shouldThrow();
711	+	} catch (IllegalArgumentException success) {}
712	+	}
713	+
714	+	/**
715	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
716	+	*/
717	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
718	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
719	+	public void testGetWaitingThreadsIMSE(boolean fair) {
720	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
721	+	final Condition c = lock.newCondition();
722	+	try {
723	+	lock.getWaitingThreads(c);
724	+	shouldThrow();
725	+	} catch (IllegalMonitorStateException success) {}
726	+	}
727	+
728	+	/**
729	+	* hasWaiters returns true when a thread is waiting, else false
730	+	*/
731	+	public void testHasWaiters()      { testHasWaiters(false); }
732	+	public void testHasWaiters_fair() { testHasWaiters(true); }
733	+	public void testHasWaiters(boolean fair) {
734	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
735	+	final Condition c = lock.newCondition();
736	+	final CountDownLatch pleaseSignal = new CountDownLatch(1);
737	+	Thread t = newStartedThread(new CheckedRunnable() {
738	+	public void realRun() throws InterruptedException {
739	+	lock.lock();
740	+	assertHasNoWaiters(lock, c);
741	+	assertFalse(lock.hasWaiters(c));
742	+	pleaseSignal.countDown();
743	+	c.await();
744	+	assertHasNoWaiters(lock, c);
745	+	assertFalse(lock.hasWaiters(c));
746	+	lock.unlock();
747	+	}});
748	+
749	+	await(pleaseSignal);
750	+	lock.lock();
751	+	assertHasWaiters(lock, c, t);
752	+	assertTrue(lock.hasWaiters(c));
753	+	c.signal();
754	+	assertHasNoWaiters(lock, c);
755	+	assertFalse(lock.hasWaiters(c));
756	+	lock.unlock();
757	+	awaitTermination(t);
758	+	assertHasNoWaiters(lock, c);
759	+	}
760	+
761	+	/**
762	+	* getWaitQueueLength returns number of waiting threads
763	+	*/
764	+	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
765	+	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
766	+	public void testGetWaitQueueLength(boolean fair) {
767	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
768	+	final Condition c = lock.newCondition();
769	+	final CountDownLatch locked1 = new CountDownLatch(1);
770	+	final CountDownLatch locked2 = new CountDownLatch(1);
771	+	Thread t1 = new Thread(new CheckedRunnable() {
772	+	public void realRun() throws InterruptedException {
773	+	lock.lock();
774	+	assertFalse(lock.hasWaiters(c));
775	+	assertEquals(0, lock.getWaitQueueLength(c));
776	+	locked1.countDown();
777	+	c.await();
778	+	lock.unlock();
779	+	}});
780	+
781	+	Thread t2 = new Thread(new CheckedRunnable() {
782	+	public void realRun() throws InterruptedException {
783	+	lock.lock();
784	+	assertTrue(lock.hasWaiters(c));
785	+	assertEquals(1, lock.getWaitQueueLength(c));
786	+	locked2.countDown();
787	+	c.await();
788	+	lock.unlock();
789	+	}});
790	+
791	+	lock.lock();
792	+	assertEquals(0, lock.getWaitQueueLength(c));
793	+	lock.unlock();
794	+
795	+	t1.start();
796	+	await(locked1);
797	+
798	+	lock.lock();
799	+	assertHasWaiters(lock, c, t1);
800	+	assertEquals(1, lock.getWaitQueueLength(c));
801	+	lock.unlock();
802	+
803	+	t2.start();
804	+	await(locked2);
805	+
806	+	lock.lock();
807	+	assertHasWaiters(lock, c, t1, t2);
808	+	assertEquals(2, lock.getWaitQueueLength(c));
809	+	c.signalAll();
810	+	assertHasNoWaiters(lock, c);
811	+	lock.unlock();
812	+
813	+	awaitTermination(t1);
814	+	awaitTermination(t2);
815	+
816	+	assertHasNoWaiters(lock, c);
817	+	}
818	+
819	+	/**
820	+	* getWaitingThreads returns only and all waiting threads
821	+	*/
822	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
823	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
824	+	public void testGetWaitingThreads(boolean fair) {
825	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
826	+	final Condition c = lock.newCondition();
827	+	final CountDownLatch locked1 = new CountDownLatch(1);
828	+	final CountDownLatch locked2 = new CountDownLatch(1);
829	+	Thread t1 = new Thread(new CheckedRunnable() {
830	+	public void realRun() throws InterruptedException {
831	+	lock.lock();
832	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
833	+	locked1.countDown();
834	+	c.await();
835	+	lock.unlock();
836	+	}});
837	+
838	+	Thread t2 = new Thread(new CheckedRunnable() {
839	+	public void realRun() throws InterruptedException {
840	+	lock.lock();
841	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
842	+	locked2.countDown();
843	+	c.await();
844	+	lock.unlock();
845	+	}});
846	+
847	+	lock.lock();
848	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
849	+	lock.unlock();
850	+
851	+	t1.start();
852	+	await(locked1);
853	+
854	+	lock.lock();
855	+	assertHasWaiters(lock, c, t1);
856	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
857	+	assertFalse(lock.getWaitingThreads(c).contains(t2));
858	+	assertEquals(1, lock.getWaitingThreads(c).size());
859	+	lock.unlock();
860	+
861	+	t2.start();
862	+	await(locked2);
863	+
864	+	lock.lock();
865	+	assertHasWaiters(lock, c, t1, t2);
866	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
867	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
868	+	assertEquals(2, lock.getWaitingThreads(c).size());
869	+	c.signalAll();
870	+	assertHasNoWaiters(lock, c);
871	+	lock.unlock();
872	+
873	+	awaitTermination(t1);
874	+	awaitTermination(t2);
875	+
876	+	assertHasNoWaiters(lock, c);
877		}
878
879	<	/*
880	<	* current thread locks interruptibly the thread
881	<	* another thread tries to aquire the lock and blocks
882	<	* on the call. interrupt the attempted aquireLock
883	<	* assert that the first lock() call actually locked the lock
884	<	* assert that the current thread is the one holding the lock
885	<	*/
886	<
887	<	public void testLockedInterruptibly() {
888	<	final ReentrantLock lock = new ReentrantLock();
889	<	try {lock.lockInterruptibly();} catch(Exception e) {}
890	<	Thread t = new Thread(new Runnable() {
891	<	public void run() {
892	<	try {
893	<	lock.lockInterruptibly();
894	<	fail("Failed to generate an Interrupted Exception");
895	<	}
896	<	catch(InterruptedException e) {}
897	<	}
898	<	});
899	<	t.start();
900	<	t.interrupt();
901	<	assertTrue(lock.isLocked());
902	<	assertTrue(lock.isHeldByCurrentThread());
879	>	/**
880	>	* awaitUninterruptibly is uninterruptible
881	>	*/
882	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
883	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
884	>	public void testAwaitUninterruptibly(boolean fair) {
885	>	final ReentrantLock lock = new ReentrantLock(fair);
886	>	final Condition c = lock.newCondition();
887	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
888	>
889	>	Thread t1 = newStartedThread(new CheckedRunnable() {
890	>	public void realRun() {
891	>	// Interrupt before awaitUninterruptibly
892	>	lock.lock();
893	>	pleaseInterrupt.countDown();
894	>	Thread.currentThread().interrupt();
895	>	c.awaitUninterruptibly();
896	>	assertTrue(Thread.interrupted());
897	>	lock.unlock();
898	>	}});
899	>
900	>	Thread t2 = newStartedThread(new CheckedRunnable() {
901	>	public void realRun() {
902	>	// Interrupt during awaitUninterruptibly
903	>	lock.lock();
904	>	pleaseInterrupt.countDown();
905	>	c.awaitUninterruptibly();
906	>	assertTrue(Thread.interrupted());
907	>	lock.unlock();
908	>	}});
909	>
910	>	await(pleaseInterrupt);
911	>	lock.lock();
912	>	lock.unlock();
913	>	t2.interrupt();
914	>
915	>	assertThreadStaysAlive(t1);
916	>	assertTrue(t2.isAlive());
917	>
918	>	lock.lock();
919	>	c.signalAll();
920	>	lock.unlock();
921	>
922	>	awaitTermination(t1);
923	>	awaitTermination(t2);
924		}
155	–
925
926	+	/**
927	+	* await/awaitNanos/awaitUntil is interruptible
928	+	*/
929	+	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
930	+	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
931	+	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
932	+	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
933	+	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
934	+	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
935	+	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
936	+	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
937	+	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
938	+	final PublicReentrantLock lock =
939	+	new PublicReentrantLock(fair);
940	+	final Condition c = lock.newCondition();
941	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
942	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
943	+	public void realRun() throws InterruptedException {
944	+	lock.lock();
945	+	assertLockedByMoi(lock);
946	+	assertHasNoWaiters(lock, c);
947	+	pleaseInterrupt.countDown();
948	+	try {
949	+	await(c, awaitMethod);
950	+	} finally {
951	+	assertLockedByMoi(lock);
952	+	assertHasNoWaiters(lock, c);
953	+	lock.unlock();
954	+	assertFalse(Thread.interrupted());
955	+	}
956	+	}});
957	+
958	+	await(pleaseInterrupt);
959	+	assertHasWaiters(lock, c, t);
960	+	t.interrupt();
961	+	awaitTermination(t);
962	+	assertNotLocked(lock);
963	+	}
964	+
965	+	/**
966	+	* signalAll wakes up all threads
967	+	*/
968	+	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
969	+	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
970	+	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
971	+	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
972	+	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
973	+	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
974	+	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
975	+	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
976	+	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
977	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
978	+	final Condition c = lock.newCondition();
979	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
980	+	class Awaiter extends CheckedRunnable {
981	+	public void realRun() throws InterruptedException {
982	+	lock.lock();
983	+	pleaseSignal.countDown();
984	+	await(c, awaitMethod);
985	+	lock.unlock();
986	+	}
987	+	}
988	+
989	+	Thread t1 = newStartedThread(new Awaiter());
990	+	Thread t2 = newStartedThread(new Awaiter());
991	+
992	+	await(pleaseSignal);
993	+	lock.lock();
994	+	assertHasWaiters(lock, c, t1, t2);
995	+	c.signalAll();
996	+	assertHasNoWaiters(lock, c);
997	+	lock.unlock();
998	+	awaitTermination(t1);
999	+	awaitTermination(t2);
1000	+	}
1001	+
1002	+	/**
1003	+	* signal wakes up waiting threads in FIFO order
1004	+	*/
1005	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1006	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1007	+	public void testSignalWakesFifo(boolean fair) {
1008	+	final PublicReentrantLock lock =
1009	+	new PublicReentrantLock(fair);
1010	+	final Condition c = lock.newCondition();
1011	+	final CountDownLatch locked1 = new CountDownLatch(1);
1012	+	final CountDownLatch locked2 = new CountDownLatch(1);
1013	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1014	+	public void realRun() throws InterruptedException {
1015	+	lock.lock();
1016	+	locked1.countDown();
1017	+	c.await();
1018	+	lock.unlock();
1019	+	}});
1020	+
1021	+	await(locked1);
1022	+
1023	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1024	+	public void realRun() throws InterruptedException {
1025	+	lock.lock();
1026	+	locked2.countDown();
1027	+	c.await();
1028	+	lock.unlock();
1029	+	}});
1030	+
1031	+	await(locked2);
1032	+
1033	+	lock.lock();
1034	+	assertHasWaiters(lock, c, t1, t2);
1035	+	assertFalse(lock.hasQueuedThreads());
1036	+	c.signal();
1037	+	assertHasWaiters(lock, c, t2);
1038	+	assertTrue(lock.hasQueuedThread(t1));
1039	+	assertFalse(lock.hasQueuedThread(t2));
1040	+	c.signal();
1041	+	assertHasNoWaiters(lock, c);
1042	+	assertTrue(lock.hasQueuedThread(t1));
1043	+	assertTrue(lock.hasQueuedThread(t2));
1044	+	lock.unlock();
1045	+	awaitTermination(t1);
1046	+	awaitTermination(t2);
1047	+	}
1048	+
1049	+	/**
1050	+	* await after multiple reentrant locking preserves lock count
1051	+	*/
1052	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1053	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1054	+	public void testAwaitLockCount(boolean fair) {
1055	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1056	+	final Condition c = lock.newCondition();
1057	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1058	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1059	+	public void realRun() throws InterruptedException {
1060	+	lock.lock();
1061	+	assertLockedByMoi(lock);
1062	+	assertEquals(1, lock.getHoldCount());
1063	+	pleaseSignal.countDown();
1064	+	c.await();
1065	+	assertLockedByMoi(lock);
1066	+	assertEquals(1, lock.getHoldCount());
1067	+	lock.unlock();
1068	+	}});
1069	+
1070	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1071	+	public void realRun() throws InterruptedException {
1072	+	lock.lock();
1073	+	lock.lock();
1074	+	assertLockedByMoi(lock);
1075	+	assertEquals(2, lock.getHoldCount());
1076	+	pleaseSignal.countDown();
1077	+	c.await();
1078	+	assertLockedByMoi(lock);
1079	+	assertEquals(2, lock.getHoldCount());
1080	+	lock.unlock();
1081	+	lock.unlock();
1082	+	}});
1083	+
1084	+	await(pleaseSignal);
1085	+	lock.lock();
1086	+	assertHasWaiters(lock, c, t1, t2);
1087	+	assertEquals(1, lock.getHoldCount());
1088	+	c.signalAll();
1089	+	assertHasNoWaiters(lock, c);
1090	+	lock.unlock();
1091	+	awaitTermination(t1);
1092	+	awaitTermination(t2);
1093	+	}
1094	+
1095	+	/**
1096	+	* A serialized lock deserializes as unlocked
1097	+	*/
1098	+	public void testSerialization()      { testSerialization(false); }
1099	+	public void testSerialization_fair() { testSerialization(true); }
1100	+	public void testSerialization(boolean fair) {
1101	+	ReentrantLock lock = new ReentrantLock(fair);
1102	+	lock.lock();
1103	+
1104	+	ReentrantLock clone = serialClone(lock);
1105	+	assertEquals(lock.isFair(), clone.isFair());
1106	+	assertTrue(lock.isLocked());
1107	+	assertFalse(clone.isLocked());
1108	+	assertEquals(1, lock.getHoldCount());
1109	+	assertEquals(0, clone.getHoldCount());
1110	+	clone.lock();
1111	+	clone.lock();
1112	+	assertTrue(clone.isLocked());
1113	+	assertEquals(2, clone.getHoldCount());
1114	+	assertEquals(1, lock.getHoldCount());
1115	+	clone.unlock();
1116	+	clone.unlock();
1117	+	assertTrue(lock.isLocked());
1118	+	assertFalse(clone.isLocked());
1119	+	}
1120	+
1121	+	/**
1122	+	* toString indicates current lock state
1123	+	*/
1124	+	public void testToString()      { testToString(false); }
1125	+	public void testToString_fair() { testToString(true); }
1126	+	public void testToString(boolean fair) {
1127	+	ReentrantLock lock = new ReentrantLock(fair);
1128	+	assertTrue(lock.toString().contains("Unlocked"));
1129	+	lock.lock();
1130	+	assertTrue(lock.toString().contains("Locked"));
1131	+	lock.unlock();
1132	+	assertTrue(lock.toString().contains("Unlocked"));
1133	+	}
1134		}

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