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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 1.51 by jsr166, Fri Jun 3 05:07:14 2011 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.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
12	<
13	<	public class ReentrantLockTest extends TestCase {
14	<	static int HOLD_COUNT_TEST_LIMIT = 20;
10	>	import java.util.concurrent.locks.Condition;
11	>	import java.util.concurrent.locks.ReentrantLock;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.CyclicBarrier;
14	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
15	>	import java.util.*;
16
17	+	public class ReentrantLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
18	–
21		public static Test suite() {
22	<	return new TestSuite(ReentrantLockTest.class);
22	>	return new TestSuite(ReentrantLockTest.class);
23	>	}
24	>
25	>	/**
26	>	* A runnable calling lockInterruptibly
27	>	*/
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29	>	final ReentrantLock lock;
30	>	InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
31	>	public void realRun() throws InterruptedException {
32	>	lock.lockInterruptibly();
33	>	}
34	>	}
35	>
36	>	/**
37	>	* A runnable calling lockInterruptibly that expects to be
38	>	* interrupted
39	>	*/
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41	>	final ReentrantLock lock;
42	>	InterruptedLockRunnable(ReentrantLock l) { lock = l; }
43	>	public void realRun() throws InterruptedException {
44	>	lock.lockInterruptibly();
45	>	}
46		}
47
48	<	private static long SHORT_DELAY_MS = 100;
49	<	private static long MEDIUM_DELAY_MS = 1000;
50	<	private static long LONG_DELAY_MS = 10000;
51	<
52	<	/*
53	<	* Unlocks an unlocked lock, throws Illegal Monitor State
54	<	*
55	<	*/
56	<
57	<	public void testIllegalMonitorStateException(){
58	<	ReentrantLock rl = new ReentrantLock();
59	<	try{
60	<	rl.unlock();
61	<	fail("Should of thown Illegal Monitor State Exception");
62	<
63	<	}catch(IllegalMonitorStateException sucess){}
64	<
65	<
66	<	}
67	<
68	<	/*
69	<	* makes a lock, locks it, tries to aquire the lock in another thread
70	<	* interrupts that thread and waits for an interrupted Exception to
71	<	* be thrown.
72	<	*/
73	<
74	<	public void testInterruptedException(){
75	<	final ReentrantLock lock = new ReentrantLock();
76	<	lock.lock();
77	<	Thread t = new Thread(new Runnable() {
78	<	public void run(){
79	<	try{
80	<	lock.lockInterruptibly();
81	<	fail("should throw");
82	<	}catch(InterruptedException sucess){}
83	<	}
84	<	});
85	<	t.start();
86	<	t.interrupt();
87	<	lock.unlock();
88	<	}
89	<
90	<	/*
91	<	* tests for interrupted exception on a timed wait
92	<	*
93	<	*/
94	<
95	<
96	<	public void testInterruptedException2(){
97	<	final ReentrantLock lock = new ReentrantLock();
98	<	lock.lock();
99	<	Thread t = new Thread(new Runnable() {
100	<	public void run(){
101	<	try{
102	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
103	<	fail("should throw");
104	<	}catch(InterruptedException sucess){}
105	<	}
106	<	});
107	<	t.start();
108	<	t.interrupt();
109	<	}
110	<
111	<
112	<	public void testGetHoldCount() {
113	<	ReentrantLock lock = new ReentrantLock();
114	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
115	<	lock.lock();
116	<	assertEquals(i,lock.getHoldCount());
117	<	}
118	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
119	<	lock.unlock();
120	<	assertEquals(i-1,lock.getHoldCount());
121	<	}
122	<	}
123	<
124	<
125	<
126	<
127	<	public void testIsLocked() {
128	<	final ReentrantLock lock = new ReentrantLock();
129	<	lock.lock();
130	<	assertTrue(lock.isLocked());
131	<	lock.unlock();
132	<	assertFalse(lock.isLocked());
133	<	Thread t = new Thread(new Runnable() {
134	<	public void run() {
135	<	lock.lock();
136	<	try {
137	<	Thread.sleep(SHORT_DELAY_MS * 2);
138	<	}
139	<	catch(Exception e) {}
140	<	lock.unlock();
141	<	}
142	<	});
143	<	try{
144	<	t.start();
145	<	Thread.sleep(SHORT_DELAY_MS);
48	>	/**
49	>	* Subclass to expose protected methods
50	>	*/
51	>	static class PublicReentrantLock extends ReentrantLock {
52	>	PublicReentrantLock() { super(); }
53	>	PublicReentrantLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56	>	}
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59	>	}
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62	>	}
63	>	}
64	>
65	>	/**
66	>	* Releases write lock, checking that it had a hold count of 1.
67	>	*/
68	>	void releaseLock(PublicReentrantLock lock) {
69	>	assertLockedByMoi(lock);
70	>	lock.unlock();
71	>	assertFalse(lock.isHeldByCurrentThread());
72	>	assertNotLocked(lock);
73	>	}
74	>
75	>	/**
76	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
77	>	*/
78	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
79	>	long startTime = System.nanoTime();
80	>	while (!lock.hasQueuedThread(t)) {
81	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
82	>	throw new AssertionFailedError("timed out");
83	>	Thread.yield();
84	>	}
85	>	assertTrue(t.isAlive());
86	>	assertTrue(lock.getOwner() != t);
87	>	}
88	>
89	>	/**
90	>	* Checks that lock is not locked.
91	>	*/
92	>	void assertNotLocked(PublicReentrantLock lock) {
93	>	assertFalse(lock.isLocked());
94	>	assertFalse(lock.isHeldByCurrentThread());
95	>	assertNull(lock.getOwner());
96	>	assertEquals(0, lock.getHoldCount());
97	>	}
98	>
99	>	/**
100	>	* Checks that lock is locked by the given thread.
101	>	*/
102	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
103	>	assertTrue(lock.isLocked());
104	>	assertSame(t, lock.getOwner());
105	>	assertEquals(t == Thread.currentThread(),
106	>	lock.isHeldByCurrentThread());
107	>	assertEquals(t == Thread.currentThread(),
108	>	lock.getHoldCount() > 0);
109	>	}
110	>
111	>	/**
112	>	* Checks that lock is locked by the current thread.
113	>	*/
114	>	void assertLockedByMoi(PublicReentrantLock lock) {
115	>	assertLockedBy(lock, Thread.currentThread());
116	>	}
117	>
118	>	/**
119	>	* Checks that condition c has no waiters.
120	>	*/
121	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
122	>	assertHasWaiters(lock, c, new Thread[] {});
123	>	}
124	>
125	>	/**
126	>	* Checks that condition c has exactly the given waiter threads.
127	>	*/
128	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
129	>	Thread... threads) {
130	>	lock.lock();
131	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
132	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
133	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
134	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
135	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
136	>	new HashSet<Thread>(Arrays.asList(threads)));
137	>	lock.unlock();
138	>	}
139	>
140	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
141	>
142	>	/**
143	>	* Awaits condition using the specified AwaitMethod.
144	>	*/
145	>	void await(Condition c, AwaitMethod awaitMethod)
146	>	throws InterruptedException {
147	>	long timeoutMillis = 2 * LONG_DELAY_MS;
148	>	switch (awaitMethod) {
149	>	case await:
150	>	c.await();
151	>	break;
152	>	case awaitTimed:
153	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
154	>	break;
155	>	case awaitNanos:
156	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
157	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
158	>	assertTrue(nanosRemaining > 0);
159	>	break;
160	>	case awaitUntil:
161	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
162	>	break;
163	>	}
164	>	}
165	>
166	>	/**
167	>	* Constructor sets given fairness, and is in unlocked state
168	>	*/
169	>	public void testConstructor() {
170	>	PublicReentrantLock lock;
171	>
172	>	lock = new PublicReentrantLock();
173	>	assertFalse(lock.isFair());
174	>	assertNotLocked(lock);
175	>
176	>	lock = new PublicReentrantLock(true);
177	>	assertTrue(lock.isFair());
178	>	assertNotLocked(lock);
179	>
180	>	lock = new PublicReentrantLock(false);
181	>	assertFalse(lock.isFair());
182	>	assertNotLocked(lock);
183	>	}
184	>
185	>	/**
186	>	* locking an unlocked lock succeeds
187	>	*/
188	>	public void testLock()      { testLock(false); }
189	>	public void testLock_fair() { testLock(true); }
190	>	public void testLock(boolean fair) {
191	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
192	>	lock.lock();
193	>	assertLockedByMoi(lock);
194	>	releaseLock(lock);
195	>	}
196	>
197	>	/**
198	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
199	>	*/
200	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
201	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
202	>	public void testUnlock_IMSE(boolean fair) {
203	>	ReentrantLock lock = new ReentrantLock(fair);
204	>	try {
205	>	lock.unlock();
206	>	shouldThrow();
207	>	} catch (IllegalMonitorStateException success) {}
208	>	}
209	>
210	>	/**
211	>	* tryLock on an unlocked lock succeeds
212	>	*/
213	>	public void testTryLock()      { testTryLock(false); }
214	>	public void testTryLock_fair() { testTryLock(true); }
215	>	public void testTryLock(boolean fair) {
216	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
217	>	assertTrue(lock.tryLock());
218	>	assertLockedByMoi(lock);
219	>	assertTrue(lock.tryLock());
220	>	assertLockedByMoi(lock);
221	>	lock.unlock();
222	>	releaseLock(lock);
223	>	}
224	>
225	>	/**
226	>	* hasQueuedThreads reports whether there are waiting threads
227	>	*/
228	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
229	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
230	>	public void testHasQueuedThreads(boolean fair) {
231	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
232	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
233	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
234	>	assertFalse(lock.hasQueuedThreads());
235	>	lock.lock();
236	>	assertFalse(lock.hasQueuedThreads());
237	>	t1.start();
238	>	waitForQueuedThread(lock, t1);
239	>	assertTrue(lock.hasQueuedThreads());
240	>	t2.start();
241	>	waitForQueuedThread(lock, t2);
242	>	assertTrue(lock.hasQueuedThreads());
243	>	t1.interrupt();
244	>	awaitTermination(t1);
245	>	assertTrue(lock.hasQueuedThreads());
246	>	lock.unlock();
247	>	awaitTermination(t2);
248	>	assertFalse(lock.hasQueuedThreads());
249	>	}
250	>
251	>	/**
252	>	* getQueueLength reports number of waiting threads
253	>	*/
254	>	public void testGetQueueLength()      { testGetQueueLength(false); }
255	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
256	>	public void testGetQueueLength(boolean fair) {
257	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
258	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
259	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
260	>	assertEquals(0, lock.getQueueLength());
261	>	lock.lock();
262	>	t1.start();
263	>	waitForQueuedThread(lock, t1);
264	>	assertEquals(1, lock.getQueueLength());
265	>	t2.start();
266	>	waitForQueuedThread(lock, t2);
267	>	assertEquals(2, lock.getQueueLength());
268	>	t1.interrupt();
269	>	awaitTermination(t1);
270	>	assertEquals(1, lock.getQueueLength());
271	>	lock.unlock();
272	>	awaitTermination(t2);
273	>	assertEquals(0, lock.getQueueLength());
274	>	}
275	>
276	>	/**
277	>	* hasQueuedThread(null) throws NPE
278	>	*/
279	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
280	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
281	>	public void testHasQueuedThreadNPE(boolean fair) {
282	>	final ReentrantLock lock = new ReentrantLock(fair);
283	>	try {
284	>	lock.hasQueuedThread(null);
285	>	shouldThrow();
286	>	} catch (NullPointerException success) {}
287	>	}
288	>
289	>	/**
290	>	* hasQueuedThread reports whether a thread is queued
291	>	*/
292	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
293	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
294	>	public void testHasQueuedThread(boolean fair) {
295	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
296	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
297	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
298	>	assertFalse(lock.hasQueuedThread(t1));
299	>	assertFalse(lock.hasQueuedThread(t2));
300	>	lock.lock();
301	>	t1.start();
302	>	waitForQueuedThread(lock, t1);
303	>	assertTrue(lock.hasQueuedThread(t1));
304	>	assertFalse(lock.hasQueuedThread(t2));
305	>	t2.start();
306	>	waitForQueuedThread(lock, t2);
307	>	assertTrue(lock.hasQueuedThread(t1));
308	>	assertTrue(lock.hasQueuedThread(t2));
309	>	t1.interrupt();
310	>	awaitTermination(t1);
311	>	assertFalse(lock.hasQueuedThread(t1));
312	>	assertTrue(lock.hasQueuedThread(t2));
313	>	lock.unlock();
314	>	awaitTermination(t2);
315	>	assertFalse(lock.hasQueuedThread(t1));
316	>	assertFalse(lock.hasQueuedThread(t2));
317	>	}
318	>
319	>	/**
320	>	* getQueuedThreads includes waiting threads
321	>	*/
322	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
323	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
324	>	public void testGetQueuedThreads(boolean fair) {
325	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
326	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
327	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
328	>	assertTrue(lock.getQueuedThreads().isEmpty());
329	>	lock.lock();
330	>	assertTrue(lock.getQueuedThreads().isEmpty());
331	>	t1.start();
332	>	waitForQueuedThread(lock, t1);
333	>	assertEquals(1, lock.getQueuedThreads().size());
334	>	assertTrue(lock.getQueuedThreads().contains(t1));
335	>	t2.start();
336	>	waitForQueuedThread(lock, t2);
337	>	assertEquals(2, lock.getQueuedThreads().size());
338	>	assertTrue(lock.getQueuedThreads().contains(t1));
339	>	assertTrue(lock.getQueuedThreads().contains(t2));
340	>	t1.interrupt();
341	>	awaitTermination(t1);
342	>	assertFalse(lock.getQueuedThreads().contains(t1));
343	>	assertTrue(lock.getQueuedThreads().contains(t2));
344	>	assertEquals(1, lock.getQueuedThreads().size());
345	>	lock.unlock();
346	>	awaitTermination(t2);
347	>	assertTrue(lock.getQueuedThreads().isEmpty());
348	>	}
349	>
350	>	/**
351	>	* timed tryLock is interruptible
352	>	*/
353	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
354	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
355	>	public void testTryLock_Interruptible(boolean fair) {
356	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
357	>	lock.lock();
358	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
359	>	public void realRun() throws InterruptedException {
360	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
361	>	}});
362	>
363	>	waitForQueuedThread(lock, t);
364	>	t.interrupt();
365	>	awaitTermination(t);
366	>	releaseLock(lock);
367	>	}
368	>
369	>	/**
370	>	* tryLock on a locked lock fails
371	>	*/
372	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
373	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
374	>	public void testTryLockWhenLocked(boolean fair) {
375	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
376	>	lock.lock();
377	>	Thread t = newStartedThread(new CheckedRunnable() {
378	>	public void realRun() {
379	>	assertFalse(lock.tryLock());
380	>	}});
381	>
382	>	awaitTermination(t);
383	>	releaseLock(lock);
384	>	}
385	>
386	>	/**
387	>	* Timed tryLock on a locked lock times out
388	>	*/
389	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
390	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
391	>	public void testTryLock_Timeout(boolean fair) {
392	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
393	>	lock.lock();
394	>	Thread t = newStartedThread(new CheckedRunnable() {
395	>	public void realRun() throws InterruptedException {
396	>	long startTime = System.nanoTime();
397	>	long timeoutMillis = 10;
398	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
399	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
400	>	}});
401	>
402	>	awaitTermination(t);
403	>	releaseLock(lock);
404	>	}
405	>
406	>	/**
407	>	* getHoldCount returns number of recursive holds
408	>	*/
409	>	public void testGetHoldCount()      { testGetHoldCount(false); }
410	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
411	>	public void testGetHoldCount(boolean fair) {
412	>	ReentrantLock lock = new ReentrantLock(fair);
413	>	for (int i = 1; i <= SIZE; i++) {
414	>	lock.lock();
415	>	assertEquals(i, lock.getHoldCount());
416	>	}
417	>	for (int i = SIZE; i > 0; i--) {
418	>	lock.unlock();
419	>	assertEquals(i-1, lock.getHoldCount());
420	>	}
421	>	}
422	>
423	>	/**
424	>	* isLocked is true when locked and false when not
425	>	*/
426	>	public void testIsLocked()      { testIsLocked(false); }
427	>	public void testIsLocked_fair() { testIsLocked(true); }
428	>	public void testIsLocked(boolean fair) {
429	>	try {
430	>	final ReentrantLock lock = new ReentrantLock(fair);
431	>	assertFalse(lock.isLocked());
432	>	lock.lock();
433	>	assertTrue(lock.isLocked());
434	>	lock.lock();
435		assertTrue(lock.isLocked());
436	<	t.join();
436	>	lock.unlock();
437	>	assertTrue(lock.isLocked());
438	>	lock.unlock();
439	>	assertFalse(lock.isLocked());
440	>	final CyclicBarrier barrier = new CyclicBarrier(2);
441	>	Thread t = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() throws Exception {
443	>	lock.lock();
444	>	assertTrue(lock.isLocked());
445	>	barrier.await();
446	>	barrier.await();
447	>	lock.unlock();
448	>	}});
449	>
450	>	barrier.await();
451	>	assertTrue(lock.isLocked());
452	>	barrier.await();
453	>	awaitTermination(t);
454		assertFalse(lock.isLocked());
455	<	} catch(Exception e){
456	<	fail("unexpected exception");
455	>	} catch (Exception e) {
456	>	threadUnexpectedException(e);
457	>	}
458	>	}
459	>
460	>	/**
461	>	* lockInterruptibly succeeds when unlocked, else is interruptible
462	>	*/
463	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
464	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
465	>	public void testLockInterruptibly(boolean fair) {
466	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
467	>	try {
468	>	lock.lockInterruptibly();
469	>	} catch (InterruptedException ie) {
470	>	threadUnexpectedException(ie);
471	>	}
472	>	assertLockedByMoi(lock);
473	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
474	>	waitForQueuedThread(lock, t);
475	>	t.interrupt();
476	>	assertTrue(lock.isLocked());
477	>	assertTrue(lock.isHeldByCurrentThread());
478	>	awaitTermination(t);
479	>	releaseLock(lock);
480	>	}
481	>
482	>	/**
483	>	* Calling await without holding lock throws IllegalMonitorStateException
484	>	*/
485	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
486	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
487	>	public void testAwait_IMSE(boolean fair) {
488	>	final ReentrantLock lock = new ReentrantLock(fair);
489	>	final Condition c = lock.newCondition();
490	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
491	>	long startTime = System.nanoTime();
492	>	try {
493	>	await(c, awaitMethod);
494	>	shouldThrow();
495	>	} catch (IllegalMonitorStateException success) {
496	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
497	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
498	>	}
499	>	}
500	>
501	>	/**
502	>	* Calling signal without holding lock throws IllegalMonitorStateException
503	>	*/
504	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
505	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
506	>	public void testSignal_IMSE(boolean fair) {
507	>	final ReentrantLock lock = new ReentrantLock(fair);
508	>	final Condition c = lock.newCondition();
509	>	try {
510	>	c.signal();
511	>	shouldThrow();
512	>	} catch (IllegalMonitorStateException success) {}
513	>	}
514	>
515	>	/**
516	>	* awaitNanos without a signal times out
517	>	*/
518	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
519	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
520	>	public void testAwaitNanos_Timeout(boolean fair) {
521	>	try {
522	>	final ReentrantLock lock = new ReentrantLock(fair);
523	>	final Condition c = lock.newCondition();
524	>	lock.lock();
525	>	long startTime = System.nanoTime();
526	>	long timeoutMillis = 10;
527	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
528	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
529	>	assertTrue(nanosRemaining <= 0);
530	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
531	>	lock.unlock();
532	>	} catch (InterruptedException e) {
533	>	threadUnexpectedException(e);
534	>	}
535	>	}
536	>
537	>	/**
538	>	* timed await without a signal times out
539	>	*/
540	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
541	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
542	>	public void testAwait_Timeout(boolean fair) {
543	>	try {
544	>	final ReentrantLock lock = new ReentrantLock(fair);
545	>	final Condition c = lock.newCondition();
546	>	lock.lock();
547	>	long startTime = System.nanoTime();
548	>	long timeoutMillis = 10;
549	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
550	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
551	>	lock.unlock();
552	>	} catch (InterruptedException e) {
553	>	threadUnexpectedException(e);
554		}
555	+	}
556
557	+	/**
558	+	* awaitUntil without a signal times out
559	+	*/
560	+	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
561	+	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
562	+	public void testAwaitUntil_Timeout(boolean fair) {
563	+	try {
564	+	final ReentrantLock lock = new ReentrantLock(fair);
565	+	final Condition c = lock.newCondition();
566	+	lock.lock();
567	+	long startTime = System.nanoTime();
568	+	long timeoutMillis = 10;
569	+	java.util.Date d = new java.util.Date();
570	+	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
571	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
572	+	lock.unlock();
573	+	} catch (InterruptedException e) {
574	+	threadUnexpectedException(e);
575	+	}
576		}
577
578	<	/*
579	<	* current thread locks interruptibly the thread
580	<	* another thread tries to aquire the lock and blocks
581	<	* on the call. interrupt the attempted aquireLock
582	<	* assert that the first lock() call actually locked the lock
583	<	* assert that the current thread is the one holding the lock
584	<	*/
585	<
586	<	public void testLockedInterruptibly() {
587	<	final ReentrantLock lock = new ReentrantLock();
588	<	try {lock.lockInterruptibly();} catch(Exception e) {}
589	<	Thread t = new Thread(new Runnable() {
590	<	public void run() {
591	<	try {
592	<	lock.lockInterruptibly();
593	<	fail("Failed to generate an Interrupted Exception");
594	<	}
595	<	catch(InterruptedException e) {}
596	<	}
597	<	});
598	<	t.start();
599	<	t.interrupt();
600	<	assertTrue(lock.isLocked());
601	<	assertTrue(lock.isHeldByCurrentThread());
578	>	/**
579	>	* await returns when signalled
580	>	*/
581	>	public void testAwait()      { testAwait(false); }
582	>	public void testAwait_fair() { testAwait(true); }
583	>	public void testAwait(boolean fair) {
584	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
585	>	final Condition c = lock.newCondition();
586	>	final CountDownLatch locked = new CountDownLatch(1);
587	>	Thread t = newStartedThread(new CheckedRunnable() {
588	>	public void realRun() throws InterruptedException {
589	>	lock.lock();
590	>	locked.countDown();
591	>	c.await();
592	>	lock.unlock();
593	>	}});
594	>
595	>	await(locked);
596	>	lock.lock();
597	>	assertHasWaiters(lock, c, t);
598	>	c.signal();
599	>	assertHasNoWaiters(lock, c);
600	>	assertTrue(t.isAlive());
601	>	lock.unlock();
602	>	awaitTermination(t);
603	>	}
604	>
605	>	/**
606	>	* hasWaiters throws NPE if null
607	>	*/
608	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
609	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
610	>	public void testHasWaitersNPE(boolean fair) {
611	>	final ReentrantLock lock = new ReentrantLock(fair);
612	>	try {
613	>	lock.hasWaiters(null);
614	>	shouldThrow();
615	>	} catch (NullPointerException success) {}
616	>	}
617	>
618	>	/**
619	>	* getWaitQueueLength throws NPE if null
620	>	*/
621	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
622	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
623	>	public void testGetWaitQueueLengthNPE(boolean fair) {
624	>	final ReentrantLock lock = new ReentrantLock(fair);
625	>	try {
626	>	lock.getWaitQueueLength(null);
627	>	shouldThrow();
628	>	} catch (NullPointerException success) {}
629	>	}
630	>
631	>	/**
632	>	* getWaitingThreads throws NPE if null
633	>	*/
634	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
635	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
636	>	public void testGetWaitingThreadsNPE(boolean fair) {
637	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
638	>	try {
639	>	lock.getWaitingThreads(null);
640	>	shouldThrow();
641	>	} catch (NullPointerException success) {}
642	>	}
643	>
644	>	/**
645	>	* hasWaiters throws IllegalArgumentException if not owned
646	>	*/
647	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
648	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
649	>	public void testHasWaitersIAE(boolean fair) {
650	>	final ReentrantLock lock = new ReentrantLock(fair);
651	>	final Condition c = lock.newCondition();
652	>	final ReentrantLock lock2 = new ReentrantLock(fair);
653	>	try {
654	>	lock2.hasWaiters(c);
655	>	shouldThrow();
656	>	} catch (IllegalArgumentException success) {}
657		}
155	–
658
659	+	/**
660	+	* hasWaiters throws IllegalMonitorStateException if not locked
661	+	*/
662	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
663	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
664	+	public void testHasWaitersIMSE(boolean fair) {
665	+	final ReentrantLock lock = new ReentrantLock(fair);
666	+	final Condition c = lock.newCondition();
667	+	try {
668	+	lock.hasWaiters(c);
669	+	shouldThrow();
670	+	} catch (IllegalMonitorStateException success) {}
671	+	}
672	+
673	+	/**
674	+	* getWaitQueueLength throws IllegalArgumentException if not owned
675	+	*/
676	+	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
677	+	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
678	+	public void testGetWaitQueueLengthIAE(boolean fair) {
679	+	final ReentrantLock lock = new ReentrantLock(fair);
680	+	final Condition c = lock.newCondition();
681	+	final ReentrantLock lock2 = new ReentrantLock(fair);
682	+	try {
683	+	lock2.getWaitQueueLength(c);
684	+	shouldThrow();
685	+	} catch (IllegalArgumentException success) {}
686	+	}
687	+
688	+	/**
689	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
690	+	*/
691	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
692	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
693	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
694	+	final ReentrantLock lock = new ReentrantLock(fair);
695	+	final Condition c = lock.newCondition();
696	+	try {
697	+	lock.getWaitQueueLength(c);
698	+	shouldThrow();
699	+	} catch (IllegalMonitorStateException success) {}
700	+	}
701	+
702	+	/**
703	+	* getWaitingThreads throws IllegalArgumentException if not owned
704	+	*/
705	+	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
706	+	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
707	+	public void testGetWaitingThreadsIAE(boolean fair) {
708	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
709	+	final Condition c = lock.newCondition();
710	+	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
711	+	try {
712	+	lock2.getWaitingThreads(c);
713	+	shouldThrow();
714	+	} catch (IllegalArgumentException success) {}
715	+	}
716	+
717	+	/**
718	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
719	+	*/
720	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
721	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
722	+	public void testGetWaitingThreadsIMSE(boolean fair) {
723	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
724	+	final Condition c = lock.newCondition();
725	+	try {
726	+	lock.getWaitingThreads(c);
727	+	shouldThrow();
728	+	} catch (IllegalMonitorStateException success) {}
729	+	}
730	+
731	+	/**
732	+	* hasWaiters returns true when a thread is waiting, else false
733	+	*/
734	+	public void testHasWaiters()      { testHasWaiters(false); }
735	+	public void testHasWaiters_fair() { testHasWaiters(true); }
736	+	public void testHasWaiters(boolean fair) {
737	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
738	+	final Condition c = lock.newCondition();
739	+	final CountDownLatch pleaseSignal = new CountDownLatch(1);
740	+	Thread t = newStartedThread(new CheckedRunnable() {
741	+	public void realRun() throws InterruptedException {
742	+	lock.lock();
743	+	assertHasNoWaiters(lock, c);
744	+	assertFalse(lock.hasWaiters(c));
745	+	pleaseSignal.countDown();
746	+	c.await();
747	+	assertHasNoWaiters(lock, c);
748	+	assertFalse(lock.hasWaiters(c));
749	+	lock.unlock();
750	+	}});
751	+
752	+	await(pleaseSignal);
753	+	lock.lock();
754	+	assertHasWaiters(lock, c, t);
755	+	assertTrue(lock.hasWaiters(c));
756	+	c.signal();
757	+	assertHasNoWaiters(lock, c);
758	+	assertFalse(lock.hasWaiters(c));
759	+	lock.unlock();
760	+	awaitTermination(t);
761	+	assertHasNoWaiters(lock, c);
762	+	}
763	+
764	+	/**
765	+	* getWaitQueueLength returns number of waiting threads
766	+	*/
767	+	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
768	+	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
769	+	public void testGetWaitQueueLength(boolean fair) {
770	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
771	+	final Condition c = lock.newCondition();
772	+	final CountDownLatch locked1 = new CountDownLatch(1);
773	+	final CountDownLatch locked2 = new CountDownLatch(1);
774	+	Thread t1 = new Thread(new CheckedRunnable() {
775	+	public void realRun() throws InterruptedException {
776	+	lock.lock();
777	+	assertFalse(lock.hasWaiters(c));
778	+	assertEquals(0, lock.getWaitQueueLength(c));
779	+	locked1.countDown();
780	+	c.await();
781	+	lock.unlock();
782	+	}});
783	+
784	+	Thread t2 = new Thread(new CheckedRunnable() {
785	+	public void realRun() throws InterruptedException {
786	+	lock.lock();
787	+	assertTrue(lock.hasWaiters(c));
788	+	assertEquals(1, lock.getWaitQueueLength(c));
789	+	locked2.countDown();
790	+	c.await();
791	+	lock.unlock();
792	+	}});
793	+
794	+	lock.lock();
795	+	assertEquals(0, lock.getWaitQueueLength(c));
796	+	lock.unlock();
797	+
798	+	t1.start();
799	+	await(locked1);
800	+
801	+	lock.lock();
802	+	assertHasWaiters(lock, c, t1);
803	+	assertEquals(1, lock.getWaitQueueLength(c));
804	+	lock.unlock();
805	+
806	+	t2.start();
807	+	await(locked2);
808	+
809	+	lock.lock();
810	+	assertHasWaiters(lock, c, t1, t2);
811	+	assertEquals(2, lock.getWaitQueueLength(c));
812	+	c.signalAll();
813	+	assertHasNoWaiters(lock, c);
814	+	lock.unlock();
815	+
816	+	awaitTermination(t1);
817	+	awaitTermination(t2);
818	+
819	+	assertHasNoWaiters(lock, c);
820	+	}
821	+
822	+	/**
823	+	* getWaitingThreads returns only and all waiting threads
824	+	*/
825	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
826	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
827	+	public void testGetWaitingThreads(boolean fair) {
828	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
829	+	final Condition c = lock.newCondition();
830	+	final CountDownLatch locked1 = new CountDownLatch(1);
831	+	final CountDownLatch locked2 = new CountDownLatch(1);
832	+	Thread t1 = new Thread(new CheckedRunnable() {
833	+	public void realRun() throws InterruptedException {
834	+	lock.lock();
835	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
836	+	locked1.countDown();
837	+	c.await();
838	+	lock.unlock();
839	+	}});
840	+
841	+	Thread t2 = new Thread(new CheckedRunnable() {
842	+	public void realRun() throws InterruptedException {
843	+	lock.lock();
844	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
845	+	locked2.countDown();
846	+	c.await();
847	+	lock.unlock();
848	+	}});
849	+
850	+	lock.lock();
851	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
852	+	lock.unlock();
853	+
854	+	t1.start();
855	+	await(locked1);
856	+
857	+	lock.lock();
858	+	assertHasWaiters(lock, c, t1);
859	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
860	+	assertFalse(lock.getWaitingThreads(c).contains(t2));
861	+	assertEquals(1, lock.getWaitingThreads(c).size());
862	+	lock.unlock();
863	+
864	+	t2.start();
865	+	await(locked2);
866	+
867	+	lock.lock();
868	+	assertHasWaiters(lock, c, t1, t2);
869	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
870	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
871	+	assertEquals(2, lock.getWaitingThreads(c).size());
872	+	c.signalAll();
873	+	assertHasNoWaiters(lock, c);
874	+	lock.unlock();
875	+
876	+	awaitTermination(t1);
877	+	awaitTermination(t2);
878	+
879	+	assertHasNoWaiters(lock, c);
880	+	}
881	+
882	+	/**
883	+	* awaitUninterruptibly is uninterruptible
884	+	*/
885	+	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
886	+	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
887	+	public void testAwaitUninterruptibly(boolean fair) {
888	+	final ReentrantLock lock = new ReentrantLock(fair);
889	+	final Condition c = lock.newCondition();
890	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
891	+
892	+	Thread t1 = newStartedThread(new CheckedRunnable() {
893	+	public void realRun() {
894	+	// Interrupt before awaitUninterruptibly
895	+	lock.lock();
896	+	pleaseInterrupt.countDown();
897	+	Thread.currentThread().interrupt();
898	+	c.awaitUninterruptibly();
899	+	assertTrue(Thread.interrupted());
900	+	lock.unlock();
901	+	}});
902	+
903	+	Thread t2 = newStartedThread(new CheckedRunnable() {
904	+	public void realRun() {
905	+	// Interrupt during awaitUninterruptibly
906	+	lock.lock();
907	+	pleaseInterrupt.countDown();
908	+	c.awaitUninterruptibly();
909	+	assertTrue(Thread.interrupted());
910	+	lock.unlock();
911	+	}});
912	+
913	+	await(pleaseInterrupt);
914	+	lock.lock();
915	+	lock.unlock();
916	+	t2.interrupt();
917	+
918	+	assertThreadStaysAlive(t1);
919	+	assertTrue(t2.isAlive());
920	+
921	+	lock.lock();
922	+	c.signalAll();
923	+	lock.unlock();
924	+
925	+	awaitTermination(t1);
926	+	awaitTermination(t2);
927	+	}
928	+
929	+	/**
930	+	* await/awaitNanos/awaitUntil is interruptible
931	+	*/
932	+	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
933	+	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
934	+	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
935	+	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
936	+	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
937	+	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
938	+	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
939	+	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
940	+	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
941	+	final PublicReentrantLock lock =
942	+	new PublicReentrantLock(fair);
943	+	final Condition c = lock.newCondition();
944	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
945	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
946	+	public void realRun() throws InterruptedException {
947	+	lock.lock();
948	+	assertLockedByMoi(lock);
949	+	assertHasNoWaiters(lock, c);
950	+	pleaseInterrupt.countDown();
951	+	try {
952	+	await(c, awaitMethod);
953	+	} finally {
954	+	assertLockedByMoi(lock);
955	+	assertHasNoWaiters(lock, c);
956	+	lock.unlock();
957	+	assertFalse(Thread.interrupted());
958	+	}
959	+	}});
960	+
961	+	await(pleaseInterrupt);
962	+	assertHasWaiters(lock, c, t);
963	+	t.interrupt();
964	+	awaitTermination(t);
965	+	assertNotLocked(lock);
966	+	}
967	+
968	+	/**
969	+	* signalAll wakes up all threads
970	+	*/
971	+	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
972	+	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
973	+	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
974	+	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
975	+	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
976	+	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
977	+	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
978	+	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
979	+	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
980	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
981	+	final Condition c = lock.newCondition();
982	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
983	+	class Awaiter extends CheckedRunnable {
984	+	public void realRun() throws InterruptedException {
985	+	lock.lock();
986	+	pleaseSignal.countDown();
987	+	await(c, awaitMethod);
988	+	lock.unlock();
989	+	}
990	+	}
991	+
992	+	Thread t1 = newStartedThread(new Awaiter());
993	+	Thread t2 = newStartedThread(new Awaiter());
994	+
995	+	await(pleaseSignal);
996	+	lock.lock();
997	+	assertHasWaiters(lock, c, t1, t2);
998	+	c.signalAll();
999	+	assertHasNoWaiters(lock, c);
1000	+	lock.unlock();
1001	+	awaitTermination(t1);
1002	+	awaitTermination(t2);
1003	+	}
1004	+
1005	+	/**
1006	+	* signal wakes up waiting threads in FIFO order
1007	+	*/
1008	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1009	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1010	+	public void testSignalWakesFifo(boolean fair) {
1011	+	final PublicReentrantLock lock =
1012	+	new PublicReentrantLock(fair);
1013	+	final Condition c = lock.newCondition();
1014	+	final CountDownLatch locked1 = new CountDownLatch(1);
1015	+	final CountDownLatch locked2 = new CountDownLatch(1);
1016	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1017	+	public void realRun() throws InterruptedException {
1018	+	lock.lock();
1019	+	locked1.countDown();
1020	+	c.await();
1021	+	lock.unlock();
1022	+	}});
1023	+
1024	+	await(locked1);
1025	+
1026	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1027	+	public void realRun() throws InterruptedException {
1028	+	lock.lock();
1029	+	locked2.countDown();
1030	+	c.await();
1031	+	lock.unlock();
1032	+	}});
1033	+
1034	+	await(locked2);
1035	+
1036	+	lock.lock();
1037	+	assertHasWaiters(lock, c, t1, t2);
1038	+	assertFalse(lock.hasQueuedThreads());
1039	+	c.signal();
1040	+	assertHasWaiters(lock, c, t2);
1041	+	assertTrue(lock.hasQueuedThread(t1));
1042	+	assertFalse(lock.hasQueuedThread(t2));
1043	+	c.signal();
1044	+	assertHasNoWaiters(lock, c);
1045	+	assertTrue(lock.hasQueuedThread(t1));
1046	+	assertTrue(lock.hasQueuedThread(t2));
1047	+	lock.unlock();
1048	+	awaitTermination(t1);
1049	+	awaitTermination(t2);
1050	+	}
1051	+
1052	+	/**
1053	+	* await after multiple reentrant locking preserves lock count
1054	+	*/
1055	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1056	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1057	+	public void testAwaitLockCount(boolean fair) {
1058	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1059	+	final Condition c = lock.newCondition();
1060	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1061	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1062	+	public void realRun() throws InterruptedException {
1063	+	lock.lock();
1064	+	assertLockedByMoi(lock);
1065	+	assertEquals(1, lock.getHoldCount());
1066	+	pleaseSignal.countDown();
1067	+	c.await();
1068	+	assertLockedByMoi(lock);
1069	+	assertEquals(1, lock.getHoldCount());
1070	+	lock.unlock();
1071	+	}});
1072	+
1073	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1074	+	public void realRun() throws InterruptedException {
1075	+	lock.lock();
1076	+	lock.lock();
1077	+	assertLockedByMoi(lock);
1078	+	assertEquals(2, lock.getHoldCount());
1079	+	pleaseSignal.countDown();
1080	+	c.await();
1081	+	assertLockedByMoi(lock);
1082	+	assertEquals(2, lock.getHoldCount());
1083	+	lock.unlock();
1084	+	lock.unlock();
1085	+	}});
1086	+
1087	+	await(pleaseSignal);
1088	+	lock.lock();
1089	+	assertHasWaiters(lock, c, t1, t2);
1090	+	assertEquals(1, lock.getHoldCount());
1091	+	c.signalAll();
1092	+	assertHasNoWaiters(lock, c);
1093	+	lock.unlock();
1094	+	awaitTermination(t1);
1095	+	awaitTermination(t2);
1096	+	}
1097	+
1098	+	/**
1099	+	* A serialized lock deserializes as unlocked
1100	+	*/
1101	+	public void testSerialization()      { testSerialization(false); }
1102	+	public void testSerialization_fair() { testSerialization(true); }
1103	+	public void testSerialization(boolean fair) {
1104	+	ReentrantLock lock = new ReentrantLock(fair);
1105	+	lock.lock();
1106	+
1107	+	ReentrantLock clone = serialClone(lock);
1108	+	assertEquals(lock.isFair(), clone.isFair());
1109	+	assertTrue(lock.isLocked());
1110	+	assertFalse(clone.isLocked());
1111	+	assertEquals(1, lock.getHoldCount());
1112	+	assertEquals(0, clone.getHoldCount());
1113	+	clone.lock();
1114	+	clone.lock();
1115	+	assertTrue(clone.isLocked());
1116	+	assertEquals(2, clone.getHoldCount());
1117	+	assertEquals(1, lock.getHoldCount());
1118	+	clone.unlock();
1119	+	clone.unlock();
1120	+	assertTrue(lock.isLocked());
1121	+	assertFalse(clone.isLocked());
1122	+	}
1123	+
1124	+	/**
1125	+	* toString indicates current lock state
1126	+	*/
1127	+	public void testToString()      { testToString(false); }
1128	+	public void testToString_fair() { testToString(true); }
1129	+	public void testToString(boolean fair) {
1130	+	ReentrantLock lock = new ReentrantLock(fair);
1131	+	assertTrue(lock.toString().contains("Unlocked"));
1132	+	lock.lock();
1133	+	assertTrue(lock.toString().contains("Locked"));
1134	+	lock.unlock();
1135	+	assertTrue(lock.toString().contains("Unlocked"));
1136	+	}
1137		}

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