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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 1.63 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.*;
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	+	// 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	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
575	+	}
576	+
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	+	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	+	lock.hasWaiters(null);
613	+	shouldThrow();
614	+	} catch (NullPointerException success) {}
615	+	}
616	+
617	+	/**
618	+	* getWaitQueueLength throws NPE if null
619	+	*/
620	+	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
621	+	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
622	+	public void testGetWaitQueueLengthNPE(boolean fair) {
623	+	final ReentrantLock lock = new ReentrantLock(fair);
624	+	try {
625	+	lock.getWaitQueueLength(null);
626	+	shouldThrow();
627	+	} catch (NullPointerException success) {}
628	+	}
629	+
630	+	/**
631	+	* 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	+	final ReentrantLock lock2 = new ReentrantLock(fair);
652	+	try {
653	+	lock2.hasWaiters(c);
654	+	shouldThrow();
655	+	} catch (IllegalArgumentException success) {}
656	+	}
657	+
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	+	lock2.getWaitQueueLength(c);
683	+	shouldThrow();
684	+	} catch (IllegalArgumentException success) {}
685	+	}
686	+
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	+	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	+	lock2.getWaitingThreads(c);
712	+	shouldThrow();
713	+	} catch (IllegalArgumentException success) {}
714	+	}
715	+
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	<	* current thread locks interruptibly the thread
883	<	* another thread tries to aquire the lock and blocks
884	<	* on the call. interrupt the attempted aquireLock
885	<	* assert that the first lock() call actually locked the lock
886	<	* assert that the current thread is the one holding the lock
887	<	*/
888	<
889	<	public void testLockedInterruptibly() {
890	<	final ReentrantLock lock = new ReentrantLock();
891	<	try {lock.lockInterruptibly();} catch(Exception e) {}
892	<	Thread t = new Thread(new Runnable() {
893	<	public void run() {
894	<	try {
895	<	lock.lockInterruptibly();
896	<	fail("Failed to generate an Interrupted Exception");
897	<	}
898	<	catch(InterruptedException e) {}
899	<	}
900	<	});
901	<	t.start();
902	<	t.interrupt();
903	<	assertTrue(lock.isLocked());
904	<	assertTrue(lock.isHeldByCurrentThread());
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		}
155	–
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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