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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 1.59 by jsr166, Sun May 24 01:42:14 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 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 nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
163	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
164	>	assertTrue(nanosRemaining > 0);
165	>	break;
166	>	case awaitUntil:
167	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
168	>	break;
169	>	default:
170	>	throw new AssertionError();
171	>	}
172		}
173
174	<	private static long SHORT_DELAY_MS = 100;
175	<	private static long MEDIUM_DELAY_MS = 1000;
176	<	private static long LONG_DELAY_MS = 10000;
177	<
178	<	/*
179	<	* Unlocks an unlocked lock, throws Illegal Monitor State
180	<	*
181	<	*/
182	<
183	<	public void testIllegalMonitorStateException(){
184	<	ReentrantLock rl = new ReentrantLock();
185	<	try{
186	<	rl.unlock();
187	<	fail("Should of thown Illegal Monitor State Exception");
188	<
189	<	}catch(IllegalMonitorStateException sucess){}
190	<
191	<
192	<	}
193	<
194	<	/*
195	<	* makes a lock, locks it, tries to aquire the lock in another thread
196	<	* interrupts that thread and waits for an interrupted Exception to
197	<	* be thrown.
198	<	*/
199	<
200	<	public void testInterruptedException(){
201	<	final ReentrantLock lock = new ReentrantLock();
202	<	lock.lock();
203	<	Thread t = new Thread(new Runnable() {
204	<	public void run(){
205	<	try{
206	<	lock.lockInterruptibly();
207	<	fail("should throw");
208	<	}catch(InterruptedException sucess){}
209	<	}
210	<	});
211	<	t.start();
212	<	t.interrupt();
213	<	lock.unlock();
214	<	}
215	<
216	<	/*
217	<	* tests for interrupted exception on a timed wait
218	<	*
219	<	*/
220	<
221	<
222	<	public void testInterruptedException2(){
223	<	final ReentrantLock lock = new ReentrantLock();
224	<	lock.lock();
225	<	Thread t = new Thread(new Runnable() {
226	<	public void run(){
227	<	try{
228	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
229	<	fail("should throw");
230	<	}catch(InterruptedException sucess){}
231	<	}
232	<	});
233	<	t.start();
234	<	t.interrupt();
235	<	}
236	<
237	<
238	<	public void testGetHoldCount() {
239	<	ReentrantLock lock = new ReentrantLock();
240	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
241	<	lock.lock();
242	<	assertEquals(i,lock.getHoldCount());
243	<	}
244	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
245	<	lock.unlock();
246	<	assertEquals(i-1,lock.getHoldCount());
247	<	}
248	<	}
249	<
250	<
251	<
252	<
253	<	public void testIsLocked() {
254	<	final ReentrantLock lock = new ReentrantLock();
255	<	lock.lock();
256	<	assertTrue(lock.isLocked());
257	<	lock.unlock();
258	<	assertFalse(lock.isLocked());
259	<	Thread t = new Thread(new Runnable() {
260	<	public void run() {
261	<	lock.lock();
262	<	try {
263	<	Thread.sleep(SHORT_DELAY_MS * 2);
264	<	}
265	<	catch(Exception e) {}
266	<	lock.unlock();
267	<	}
268	<	});
269	<	try{
270	<	t.start();
271	<	Thread.sleep(SHORT_DELAY_MS);
174	>	/**
175	>	* Constructor sets given fairness, and is in unlocked state
176	>	*/
177	>	public void testConstructor() {
178	>	PublicReentrantLock lock;
179	>
180	>	lock = new PublicReentrantLock();
181	>	assertFalse(lock.isFair());
182	>	assertNotLocked(lock);
183	>
184	>	lock = new PublicReentrantLock(true);
185	>	assertTrue(lock.isFair());
186	>	assertNotLocked(lock);
187	>
188	>	lock = new PublicReentrantLock(false);
189	>	assertFalse(lock.isFair());
190	>	assertNotLocked(lock);
191	>	}
192	>
193	>	/**
194	>	* locking an unlocked lock succeeds
195	>	*/
196	>	public void testLock()      { testLock(false); }
197	>	public void testLock_fair() { testLock(true); }
198	>	public void testLock(boolean fair) {
199	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
200	>	lock.lock();
201	>	assertLockedByMoi(lock);
202	>	releaseLock(lock);
203	>	}
204	>
205	>	/**
206	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
207	>	*/
208	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
209	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
210	>	public void testUnlock_IMSE(boolean fair) {
211	>	ReentrantLock lock = new ReentrantLock(fair);
212	>	try {
213	>	lock.unlock();
214	>	shouldThrow();
215	>	} catch (IllegalMonitorStateException success) {}
216	>	}
217	>
218	>	/**
219	>	* tryLock on an unlocked lock succeeds
220	>	*/
221	>	public void testTryLock()      { testTryLock(false); }
222	>	public void testTryLock_fair() { testTryLock(true); }
223	>	public void testTryLock(boolean fair) {
224	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
225	>	assertTrue(lock.tryLock());
226	>	assertLockedByMoi(lock);
227	>	assertTrue(lock.tryLock());
228	>	assertLockedByMoi(lock);
229	>	lock.unlock();
230	>	releaseLock(lock);
231	>	}
232	>
233	>	/**
234	>	* hasQueuedThreads reports whether there are waiting threads
235	>	*/
236	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
237	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
238	>	public void testHasQueuedThreads(boolean fair) {
239	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
240	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
241	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
242	>	assertFalse(lock.hasQueuedThreads());
243	>	lock.lock();
244	>	assertFalse(lock.hasQueuedThreads());
245	>	t1.start();
246	>	waitForQueuedThread(lock, t1);
247	>	assertTrue(lock.hasQueuedThreads());
248	>	t2.start();
249	>	waitForQueuedThread(lock, t2);
250	>	assertTrue(lock.hasQueuedThreads());
251	>	t1.interrupt();
252	>	awaitTermination(t1);
253	>	assertTrue(lock.hasQueuedThreads());
254	>	lock.unlock();
255	>	awaitTermination(t2);
256	>	assertFalse(lock.hasQueuedThreads());
257	>	}
258	>
259	>	/**
260	>	* getQueueLength reports number of waiting threads
261	>	*/
262	>	public void testGetQueueLength()      { testGetQueueLength(false); }
263	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
264	>	public void testGetQueueLength(boolean fair) {
265	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
266	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
267	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
268	>	assertEquals(0, lock.getQueueLength());
269	>	lock.lock();
270	>	t1.start();
271	>	waitForQueuedThread(lock, t1);
272	>	assertEquals(1, lock.getQueueLength());
273	>	t2.start();
274	>	waitForQueuedThread(lock, t2);
275	>	assertEquals(2, lock.getQueueLength());
276	>	t1.interrupt();
277	>	awaitTermination(t1);
278	>	assertEquals(1, lock.getQueueLength());
279	>	lock.unlock();
280	>	awaitTermination(t2);
281	>	assertEquals(0, lock.getQueueLength());
282	>	}
283	>
284	>	/**
285	>	* hasQueuedThread(null) throws NPE
286	>	*/
287	>	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
288	>	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
289	>	public void testHasQueuedThreadNPE(boolean fair) {
290	>	final ReentrantLock lock = new ReentrantLock(fair);
291	>	try {
292	>	lock.hasQueuedThread(null);
293	>	shouldThrow();
294	>	} catch (NullPointerException success) {}
295	>	}
296	>
297	>	/**
298	>	* hasQueuedThread reports whether a thread is queued
299	>	*/
300	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
301	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
302	>	public void testHasQueuedThread(boolean fair) {
303	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
304	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
305	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
306	>	assertFalse(lock.hasQueuedThread(t1));
307	>	assertFalse(lock.hasQueuedThread(t2));
308	>	lock.lock();
309	>	t1.start();
310	>	waitForQueuedThread(lock, t1);
311	>	assertTrue(lock.hasQueuedThread(t1));
312	>	assertFalse(lock.hasQueuedThread(t2));
313	>	t2.start();
314	>	waitForQueuedThread(lock, t2);
315	>	assertTrue(lock.hasQueuedThread(t1));
316	>	assertTrue(lock.hasQueuedThread(t2));
317	>	t1.interrupt();
318	>	awaitTermination(t1);
319	>	assertFalse(lock.hasQueuedThread(t1));
320	>	assertTrue(lock.hasQueuedThread(t2));
321	>	lock.unlock();
322	>	awaitTermination(t2);
323	>	assertFalse(lock.hasQueuedThread(t1));
324	>	assertFalse(lock.hasQueuedThread(t2));
325	>	}
326	>
327	>	/**
328	>	* getQueuedThreads includes waiting threads
329	>	*/
330	>	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
331	>	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
332	>	public void testGetQueuedThreads(boolean fair) {
333	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
334	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
335	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
336	>	assertTrue(lock.getQueuedThreads().isEmpty());
337	>	lock.lock();
338	>	assertTrue(lock.getQueuedThreads().isEmpty());
339	>	t1.start();
340	>	waitForQueuedThread(lock, t1);
341	>	assertEquals(1, lock.getQueuedThreads().size());
342	>	assertTrue(lock.getQueuedThreads().contains(t1));
343	>	t2.start();
344	>	waitForQueuedThread(lock, t2);
345	>	assertEquals(2, lock.getQueuedThreads().size());
346	>	assertTrue(lock.getQueuedThreads().contains(t1));
347	>	assertTrue(lock.getQueuedThreads().contains(t2));
348	>	t1.interrupt();
349	>	awaitTermination(t1);
350	>	assertFalse(lock.getQueuedThreads().contains(t1));
351	>	assertTrue(lock.getQueuedThreads().contains(t2));
352	>	assertEquals(1, lock.getQueuedThreads().size());
353	>	lock.unlock();
354	>	awaitTermination(t2);
355	>	assertTrue(lock.getQueuedThreads().isEmpty());
356	>	}
357	>
358	>	/**
359	>	* timed tryLock is interruptible
360	>	*/
361	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
362	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
363	>	public void testTryLock_Interruptible(boolean fair) {
364	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
365	>	lock.lock();
366	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
367	>	public void realRun() throws InterruptedException {
368	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
369	>	}});
370	>
371	>	waitForQueuedThread(lock, t);
372	>	t.interrupt();
373	>	awaitTermination(t);
374	>	releaseLock(lock);
375	>	}
376	>
377	>	/**
378	>	* tryLock on a locked lock fails
379	>	*/
380	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
381	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
382	>	public void testTryLockWhenLocked(boolean fair) {
383	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
384	>	lock.lock();
385	>	Thread t = newStartedThread(new CheckedRunnable() {
386	>	public void realRun() {
387	>	assertFalse(lock.tryLock());
388	>	}});
389	>
390	>	awaitTermination(t);
391	>	releaseLock(lock);
392	>	}
393	>
394	>	/**
395	>	* Timed tryLock on a locked lock times out
396	>	*/
397	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
398	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
399	>	public void testTryLock_Timeout(boolean fair) {
400	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
401	>	lock.lock();
402	>	Thread t = newStartedThread(new CheckedRunnable() {
403	>	public void realRun() throws InterruptedException {
404	>	long startTime = System.nanoTime();
405	>	long timeoutMillis = 10;
406	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
407	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
408	>	}});
409	>
410	>	awaitTermination(t);
411	>	releaseLock(lock);
412	>	}
413	>
414	>	/**
415	>	* getHoldCount returns number of recursive holds
416	>	*/
417	>	public void testGetHoldCount()      { testGetHoldCount(false); }
418	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
419	>	public void testGetHoldCount(boolean fair) {
420	>	ReentrantLock lock = new ReentrantLock(fair);
421	>	for (int i = 1; i <= SIZE; i++) {
422	>	lock.lock();
423	>	assertEquals(i, lock.getHoldCount());
424	>	}
425	>	for (int i = SIZE; i > 0; i--) {
426	>	lock.unlock();
427	>	assertEquals(i - 1, lock.getHoldCount());
428	>	}
429	>	}
430	>
431	>	/**
432	>	* isLocked is true when locked and false when not
433	>	*/
434	>	public void testIsLocked()      { testIsLocked(false); }
435	>	public void testIsLocked_fair() { testIsLocked(true); }
436	>	public void testIsLocked(boolean fair) {
437	>	try {
438	>	final ReentrantLock lock = new ReentrantLock(fair);
439	>	assertFalse(lock.isLocked());
440	>	lock.lock();
441		assertTrue(lock.isLocked());
442	<	t.join();
442	>	lock.lock();
443	>	assertTrue(lock.isLocked());
444	>	lock.unlock();
445	>	assertTrue(lock.isLocked());
446	>	lock.unlock();
447	>	assertFalse(lock.isLocked());
448	>	final CyclicBarrier barrier = new CyclicBarrier(2);
449	>	Thread t = newStartedThread(new CheckedRunnable() {
450	>	public void realRun() throws Exception {
451	>	lock.lock();
452	>	assertTrue(lock.isLocked());
453	>	barrier.await();
454	>	barrier.await();
455	>	lock.unlock();
456	>	}});
457	>
458	>	barrier.await();
459	>	assertTrue(lock.isLocked());
460	>	barrier.await();
461	>	awaitTermination(t);
462		assertFalse(lock.isLocked());
463	<	} catch(Exception e){
464	<	fail("unexpected exception");
463	>	} catch (Exception fail) { threadUnexpectedException(fail); }
464	>	}
465	>
466	>	/**
467	>	* lockInterruptibly succeeds when unlocked, else is interruptible
468	>	*/
469	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
470	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
471	>	public void testLockInterruptibly(boolean fair) {
472	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
473	>	try {
474	>	lock.lockInterruptibly();
475	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
476	>	assertLockedByMoi(lock);
477	>	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
478	>	waitForQueuedThread(lock, t);
479	>	t.interrupt();
480	>	assertTrue(lock.isLocked());
481	>	assertTrue(lock.isHeldByCurrentThread());
482	>	awaitTermination(t);
483	>	releaseLock(lock);
484	>	}
485	>
486	>	/**
487	>	* Calling await without holding lock throws IllegalMonitorStateException
488	>	*/
489	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
490	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
491	>	public void testAwait_IMSE(boolean fair) {
492	>	final ReentrantLock lock = new ReentrantLock(fair);
493	>	final Condition c = lock.newCondition();
494	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
495	>	long startTime = System.nanoTime();
496	>	try {
497	>	await(c, awaitMethod);
498	>	shouldThrow();
499	>	} catch (IllegalMonitorStateException success) {
500	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
501	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
502		}
503	+	}
504
505	+	/**
506	+	* Calling signal without holding lock throws IllegalMonitorStateException
507	+	*/
508	+	public void testSignal_IMSE()      { testSignal_IMSE(false); }
509	+	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
510	+	public void testSignal_IMSE(boolean fair) {
511	+	final ReentrantLock lock = new ReentrantLock(fair);
512	+	final Condition c = lock.newCondition();
513	+	try {
514	+	c.signal();
515	+	shouldThrow();
516	+	} catch (IllegalMonitorStateException success) {}
517	+	}
518	+
519	+	/**
520	+	* awaitNanos without a signal times out
521	+	*/
522	+	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
523	+	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
524	+	public void testAwaitNanos_Timeout(boolean fair) {
525	+	try {
526	+	final ReentrantLock lock = new ReentrantLock(fair);
527	+	final Condition c = lock.newCondition();
528	+	lock.lock();
529	+	long startTime = System.nanoTime();
530	+	long timeoutMillis = 10;
531	+	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
532	+	long nanosRemaining = c.awaitNanos(timeoutNanos);
533	+	assertTrue(nanosRemaining <= 0);
534	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
535	+	lock.unlock();
536	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
537	+	}
538	+
539	+	/**
540	+	* timed await without a signal times out
541	+	*/
542	+	public void testAwait_Timeout()      { testAwait_Timeout(false); }
543	+	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
544	+	public void testAwait_Timeout(boolean fair) {
545	+	try {
546	+	final ReentrantLock lock = new ReentrantLock(fair);
547	+	final Condition c = lock.newCondition();
548	+	lock.lock();
549	+	long startTime = System.nanoTime();
550	+	long timeoutMillis = 10;
551	+	assertFalse(c.await(timeoutMillis, MILLISECONDS));
552	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
553	+	lock.unlock();
554	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
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 fail) { threadUnexpectedException(fail); }
574	+	}
575	+
576	+	/**
577	+	* await returns when signalled
578	+	*/
579	+	public void testAwait()      { testAwait(false); }
580	+	public void testAwait_fair() { testAwait(true); }
581	+	public void testAwait(boolean fair) {
582	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
583	+	final Condition c = lock.newCondition();
584	+	final CountDownLatch locked = new CountDownLatch(1);
585	+	Thread t = newStartedThread(new CheckedRunnable() {
586	+	public void realRun() throws InterruptedException {
587	+	lock.lock();
588	+	locked.countDown();
589	+	c.await();
590	+	lock.unlock();
591	+	}});
592	+
593	+	await(locked);
594	+	lock.lock();
595	+	assertHasWaiters(lock, c, t);
596	+	c.signal();
597	+	assertHasNoWaiters(lock, c);
598	+	assertTrue(t.isAlive());
599	+	lock.unlock();
600	+	awaitTermination(t);
601	+	}
602	+
603	+	/**
604	+	* hasWaiters throws NPE if null
605	+	*/
606	+	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
607	+	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
608	+	public void testHasWaitersNPE(boolean fair) {
609	+	final ReentrantLock lock = new ReentrantLock(fair);
610	+	try {
611	+	lock.hasWaiters(null);
612	+	shouldThrow();
613	+	} catch (NullPointerException success) {}
614	+	}
615	+
616	+	/**
617	+	* getWaitQueueLength throws NPE if null
618	+	*/
619	+	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
620	+	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
621	+	public void testGetWaitQueueLengthNPE(boolean fair) {
622	+	final ReentrantLock lock = new ReentrantLock(fair);
623	+	try {
624	+	lock.getWaitQueueLength(null);
625	+	shouldThrow();
626	+	} catch (NullPointerException success) {}
627	+	}
628	+
629	+	/**
630	+	* getWaitingThreads throws NPE if null
631	+	*/
632	+	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
633	+	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
634	+	public void testGetWaitingThreadsNPE(boolean fair) {
635	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
636	+	try {
637	+	lock.getWaitingThreads(null);
638	+	shouldThrow();
639	+	} catch (NullPointerException success) {}
640	+	}
641	+
642	+	/**
643	+	* hasWaiters throws IllegalArgumentException if not owned
644	+	*/
645	+	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
646	+	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
647	+	public void testHasWaitersIAE(boolean fair) {
648	+	final ReentrantLock lock = new ReentrantLock(fair);
649	+	final Condition c = lock.newCondition();
650	+	final ReentrantLock lock2 = new ReentrantLock(fair);
651	+	try {
652	+	lock2.hasWaiters(c);
653	+	shouldThrow();
654	+	} catch (IllegalArgumentException success) {}
655	+	}
656	+
657	+	/**
658	+	* hasWaiters throws IllegalMonitorStateException if not locked
659	+	*/
660	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
661	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
662	+	public void testHasWaitersIMSE(boolean fair) {
663	+	final ReentrantLock lock = new ReentrantLock(fair);
664	+	final Condition c = lock.newCondition();
665	+	try {
666	+	lock.hasWaiters(c);
667	+	shouldThrow();
668	+	} catch (IllegalMonitorStateException success) {}
669	+	}
670	+
671	+	/**
672	+	* getWaitQueueLength throws IllegalArgumentException if not owned
673	+	*/
674	+	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
675	+	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
676	+	public void testGetWaitQueueLengthIAE(boolean fair) {
677	+	final ReentrantLock lock = new ReentrantLock(fair);
678	+	final Condition c = lock.newCondition();
679	+	final ReentrantLock lock2 = new ReentrantLock(fair);
680	+	try {
681	+	lock2.getWaitQueueLength(c);
682	+	shouldThrow();
683	+	} catch (IllegalArgumentException success) {}
684	+	}
685	+
686	+	/**
687	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
688	+	*/
689	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
690	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
691	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
692	+	final ReentrantLock lock = new ReentrantLock(fair);
693	+	final Condition c = lock.newCondition();
694	+	try {
695	+	lock.getWaitQueueLength(c);
696	+	shouldThrow();
697	+	} catch (IllegalMonitorStateException success) {}
698	+	}
699	+
700	+	/**
701	+	* getWaitingThreads throws IllegalArgumentException if not owned
702	+	*/
703	+	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
704	+	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
705	+	public void testGetWaitingThreadsIAE(boolean fair) {
706	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
707	+	final Condition c = lock.newCondition();
708	+	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
709	+	try {
710	+	lock2.getWaitingThreads(c);
711	+	shouldThrow();
712	+	} catch (IllegalArgumentException success) {}
713	+	}
714	+
715	+	/**
716	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
717	+	*/
718	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
719	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
720	+	public void testGetWaitingThreadsIMSE(boolean fair) {
721	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
722	+	final Condition c = lock.newCondition();
723	+	try {
724	+	lock.getWaitingThreads(c);
725	+	shouldThrow();
726	+	} catch (IllegalMonitorStateException success) {}
727	+	}
728	+
729	+	/**
730	+	* hasWaiters returns true when a thread is waiting, else false
731	+	*/
732	+	public void testHasWaiters()      { testHasWaiters(false); }
733	+	public void testHasWaiters_fair() { testHasWaiters(true); }
734	+	public void testHasWaiters(boolean fair) {
735	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
736	+	final Condition c = lock.newCondition();
737	+	final CountDownLatch pleaseSignal = new CountDownLatch(1);
738	+	Thread t = newStartedThread(new CheckedRunnable() {
739	+	public void realRun() throws InterruptedException {
740	+	lock.lock();
741	+	assertHasNoWaiters(lock, c);
742	+	assertFalse(lock.hasWaiters(c));
743	+	pleaseSignal.countDown();
744	+	c.await();
745	+	assertHasNoWaiters(lock, c);
746	+	assertFalse(lock.hasWaiters(c));
747	+	lock.unlock();
748	+	}});
749	+
750	+	await(pleaseSignal);
751	+	lock.lock();
752	+	assertHasWaiters(lock, c, t);
753	+	assertTrue(lock.hasWaiters(c));
754	+	c.signal();
755	+	assertHasNoWaiters(lock, c);
756	+	assertFalse(lock.hasWaiters(c));
757	+	lock.unlock();
758	+	awaitTermination(t);
759	+	assertHasNoWaiters(lock, c);
760	+	}
761	+
762	+	/**
763	+	* getWaitQueueLength returns number of waiting threads
764	+	*/
765	+	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
766	+	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
767	+	public void testGetWaitQueueLength(boolean fair) {
768	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
769	+	final Condition c = lock.newCondition();
770	+	final CountDownLatch locked1 = new CountDownLatch(1);
771	+	final CountDownLatch locked2 = new CountDownLatch(1);
772	+	Thread t1 = new Thread(new CheckedRunnable() {
773	+	public void realRun() throws InterruptedException {
774	+	lock.lock();
775	+	assertFalse(lock.hasWaiters(c));
776	+	assertEquals(0, lock.getWaitQueueLength(c));
777	+	locked1.countDown();
778	+	c.await();
779	+	lock.unlock();
780	+	}});
781	+
782	+	Thread t2 = new Thread(new CheckedRunnable() {
783	+	public void realRun() throws InterruptedException {
784	+	lock.lock();
785	+	assertTrue(lock.hasWaiters(c));
786	+	assertEquals(1, lock.getWaitQueueLength(c));
787	+	locked2.countDown();
788	+	c.await();
789	+	lock.unlock();
790	+	}});
791	+
792	+	lock.lock();
793	+	assertEquals(0, lock.getWaitQueueLength(c));
794	+	lock.unlock();
795	+
796	+	t1.start();
797	+	await(locked1);
798	+
799	+	lock.lock();
800	+	assertHasWaiters(lock, c, t1);
801	+	assertEquals(1, lock.getWaitQueueLength(c));
802	+	lock.unlock();
803	+
804	+	t2.start();
805	+	await(locked2);
806	+
807	+	lock.lock();
808	+	assertHasWaiters(lock, c, t1, t2);
809	+	assertEquals(2, lock.getWaitQueueLength(c));
810	+	c.signalAll();
811	+	assertHasNoWaiters(lock, c);
812	+	lock.unlock();
813	+
814	+	awaitTermination(t1);
815	+	awaitTermination(t2);
816	+
817	+	assertHasNoWaiters(lock, c);
818	+	}
819	+
820	+	/**
821	+	* getWaitingThreads returns only and all waiting threads
822	+	*/
823	+	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
824	+	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
825	+	public void testGetWaitingThreads(boolean fair) {
826	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
827	+	final Condition c = lock.newCondition();
828	+	final CountDownLatch locked1 = new CountDownLatch(1);
829	+	final CountDownLatch locked2 = new CountDownLatch(1);
830	+	Thread t1 = new Thread(new CheckedRunnable() {
831	+	public void realRun() throws InterruptedException {
832	+	lock.lock();
833	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
834	+	locked1.countDown();
835	+	c.await();
836	+	lock.unlock();
837	+	}});
838	+
839	+	Thread t2 = new Thread(new CheckedRunnable() {
840	+	public void realRun() throws InterruptedException {
841	+	lock.lock();
842	+	assertFalse(lock.getWaitingThreads(c).isEmpty());
843	+	locked2.countDown();
844	+	c.await();
845	+	lock.unlock();
846	+	}});
847	+
848	+	lock.lock();
849	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
850	+	lock.unlock();
851	+
852	+	t1.start();
853	+	await(locked1);
854	+
855	+	lock.lock();
856	+	assertHasWaiters(lock, c, t1);
857	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
858	+	assertFalse(lock.getWaitingThreads(c).contains(t2));
859	+	assertEquals(1, lock.getWaitingThreads(c).size());
860	+	lock.unlock();
861	+
862	+	t2.start();
863	+	await(locked2);
864	+
865	+	lock.lock();
866	+	assertHasWaiters(lock, c, t1, t2);
867	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
868	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
869	+	assertEquals(2, lock.getWaitingThreads(c).size());
870	+	c.signalAll();
871	+	assertHasNoWaiters(lock, c);
872	+	lock.unlock();
873	+
874	+	awaitTermination(t1);
875	+	awaitTermination(t2);
876	+
877	+	assertHasNoWaiters(lock, c);
878		}
879
880	<	/*
881	<	* current thread locks interruptibly the thread
882	<	* another thread tries to aquire the lock and blocks
883	<	* on the call. interrupt the attempted aquireLock
884	<	* assert that the first lock() call actually locked the lock
885	<	* assert that the current thread is the one holding the lock
886	<	*/
887	<
888	<	public void testLockedInterruptibly() {
889	<	final ReentrantLock lock = new ReentrantLock();
890	<	try {lock.lockInterruptibly();} catch(Exception e) {}
891	<	Thread t = new Thread(new Runnable() {
892	<	public void run() {
893	<	try {
894	<	lock.lockInterruptibly();
895	<	fail("Failed to generate an Interrupted Exception");
896	<	}
897	<	catch(InterruptedException e) {}
898	<	}
899	<	});
900	<	t.start();
901	<	t.interrupt();
902	<	assertTrue(lock.isLocked());
903	<	assertTrue(lock.isHeldByCurrentThread());
880	>	/**
881	>	* awaitUninterruptibly is uninterruptible
882	>	*/
883	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
884	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
885	>	public void testAwaitUninterruptibly(boolean fair) {
886	>	final ReentrantLock lock = new ReentrantLock(fair);
887	>	final Condition c = lock.newCondition();
888	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
889	>
890	>	Thread t1 = newStartedThread(new CheckedRunnable() {
891	>	public void realRun() {
892	>	// Interrupt before awaitUninterruptibly
893	>	lock.lock();
894	>	pleaseInterrupt.countDown();
895	>	Thread.currentThread().interrupt();
896	>	c.awaitUninterruptibly();
897	>	assertTrue(Thread.interrupted());
898	>	lock.unlock();
899	>	}});
900	>
901	>	Thread t2 = newStartedThread(new CheckedRunnable() {
902	>	public void realRun() {
903	>	// Interrupt during awaitUninterruptibly
904	>	lock.lock();
905	>	pleaseInterrupt.countDown();
906	>	c.awaitUninterruptibly();
907	>	assertTrue(Thread.interrupted());
908	>	lock.unlock();
909	>	}});
910	>
911	>	await(pleaseInterrupt);
912	>	lock.lock();
913	>	lock.unlock();
914	>	t2.interrupt();
915	>
916	>	assertThreadStaysAlive(t1);
917	>	assertTrue(t2.isAlive());
918	>
919	>	lock.lock();
920	>	c.signalAll();
921	>	lock.unlock();
922	>
923	>	awaitTermination(t1);
924	>	awaitTermination(t2);
925		}
155	–
926
927	+	/**
928	+	* await/awaitNanos/awaitUntil is interruptible
929	+	*/
930	+	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
931	+	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
932	+	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
933	+	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
934	+	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
935	+	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
936	+	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
937	+	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
938	+	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
939	+	final PublicReentrantLock lock =
940	+	new PublicReentrantLock(fair);
941	+	final Condition c = lock.newCondition();
942	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
943	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
944	+	public void realRun() throws InterruptedException {
945	+	lock.lock();
946	+	assertLockedByMoi(lock);
947	+	assertHasNoWaiters(lock, c);
948	+	pleaseInterrupt.countDown();
949	+	try {
950	+	await(c, awaitMethod);
951	+	} finally {
952	+	assertLockedByMoi(lock);
953	+	assertHasNoWaiters(lock, c);
954	+	lock.unlock();
955	+	assertFalse(Thread.interrupted());
956	+	}
957	+	}});
958	+
959	+	await(pleaseInterrupt);
960	+	assertHasWaiters(lock, c, t);
961	+	t.interrupt();
962	+	awaitTermination(t);
963	+	assertNotLocked(lock);
964	+	}
965	+
966	+	/**
967	+	* signalAll wakes up all threads
968	+	*/
969	+	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
970	+	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
971	+	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
972	+	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
973	+	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
974	+	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
975	+	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
976	+	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
977	+	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
978	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
979	+	final Condition c = lock.newCondition();
980	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
981	+	class Awaiter extends CheckedRunnable {
982	+	public void realRun() throws InterruptedException {
983	+	lock.lock();
984	+	pleaseSignal.countDown();
985	+	await(c, awaitMethod);
986	+	lock.unlock();
987	+	}
988	+	}
989	+
990	+	Thread t1 = newStartedThread(new Awaiter());
991	+	Thread t2 = newStartedThread(new Awaiter());
992	+
993	+	await(pleaseSignal);
994	+	lock.lock();
995	+	assertHasWaiters(lock, c, t1, t2);
996	+	c.signalAll();
997	+	assertHasNoWaiters(lock, c);
998	+	lock.unlock();
999	+	awaitTermination(t1);
1000	+	awaitTermination(t2);
1001	+	}
1002	+
1003	+	/**
1004	+	* signal wakes up waiting threads in FIFO order
1005	+	*/
1006	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1007	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1008	+	public void testSignalWakesFifo(boolean fair) {
1009	+	final PublicReentrantLock lock =
1010	+	new PublicReentrantLock(fair);
1011	+	final Condition c = lock.newCondition();
1012	+	final CountDownLatch locked1 = new CountDownLatch(1);
1013	+	final CountDownLatch locked2 = new CountDownLatch(1);
1014	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1015	+	public void realRun() throws InterruptedException {
1016	+	lock.lock();
1017	+	locked1.countDown();
1018	+	c.await();
1019	+	lock.unlock();
1020	+	}});
1021	+
1022	+	await(locked1);
1023	+
1024	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1025	+	public void realRun() throws InterruptedException {
1026	+	lock.lock();
1027	+	locked2.countDown();
1028	+	c.await();
1029	+	lock.unlock();
1030	+	}});
1031	+
1032	+	await(locked2);
1033	+
1034	+	lock.lock();
1035	+	assertHasWaiters(lock, c, t1, t2);
1036	+	assertFalse(lock.hasQueuedThreads());
1037	+	c.signal();
1038	+	assertHasWaiters(lock, c, t2);
1039	+	assertTrue(lock.hasQueuedThread(t1));
1040	+	assertFalse(lock.hasQueuedThread(t2));
1041	+	c.signal();
1042	+	assertHasNoWaiters(lock, c);
1043	+	assertTrue(lock.hasQueuedThread(t1));
1044	+	assertTrue(lock.hasQueuedThread(t2));
1045	+	lock.unlock();
1046	+	awaitTermination(t1);
1047	+	awaitTermination(t2);
1048	+	}
1049	+
1050	+	/**
1051	+	* await after multiple reentrant locking preserves lock count
1052	+	*/
1053	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1054	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1055	+	public void testAwaitLockCount(boolean fair) {
1056	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1057	+	final Condition c = lock.newCondition();
1058	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1059	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1060	+	public void realRun() throws InterruptedException {
1061	+	lock.lock();
1062	+	assertLockedByMoi(lock);
1063	+	assertEquals(1, lock.getHoldCount());
1064	+	pleaseSignal.countDown();
1065	+	c.await();
1066	+	assertLockedByMoi(lock);
1067	+	assertEquals(1, lock.getHoldCount());
1068	+	lock.unlock();
1069	+	}});
1070	+
1071	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1072	+	public void realRun() throws InterruptedException {
1073	+	lock.lock();
1074	+	lock.lock();
1075	+	assertLockedByMoi(lock);
1076	+	assertEquals(2, lock.getHoldCount());
1077	+	pleaseSignal.countDown();
1078	+	c.await();
1079	+	assertLockedByMoi(lock);
1080	+	assertEquals(2, lock.getHoldCount());
1081	+	lock.unlock();
1082	+	lock.unlock();
1083	+	}});
1084	+
1085	+	await(pleaseSignal);
1086	+	lock.lock();
1087	+	assertHasWaiters(lock, c, t1, t2);
1088	+	assertEquals(1, lock.getHoldCount());
1089	+	c.signalAll();
1090	+	assertHasNoWaiters(lock, c);
1091	+	lock.unlock();
1092	+	awaitTermination(t1);
1093	+	awaitTermination(t2);
1094	+	}
1095	+
1096	+	/**
1097	+	* A serialized lock deserializes as unlocked
1098	+	*/
1099	+	public void testSerialization()      { testSerialization(false); }
1100	+	public void testSerialization_fair() { testSerialization(true); }
1101	+	public void testSerialization(boolean fair) {
1102	+	ReentrantLock lock = new ReentrantLock(fair);
1103	+	lock.lock();
1104	+
1105	+	ReentrantLock clone = serialClone(lock);
1106	+	assertEquals(lock.isFair(), clone.isFair());
1107	+	assertTrue(lock.isLocked());
1108	+	assertFalse(clone.isLocked());
1109	+	assertEquals(1, lock.getHoldCount());
1110	+	assertEquals(0, clone.getHoldCount());
1111	+	clone.lock();
1112	+	clone.lock();
1113	+	assertTrue(clone.isLocked());
1114	+	assertEquals(2, clone.getHoldCount());
1115	+	assertEquals(1, lock.getHoldCount());
1116	+	clone.unlock();
1117	+	clone.unlock();
1118	+	assertTrue(lock.isLocked());
1119	+	assertFalse(clone.isLocked());
1120	+	}
1121	+
1122	+	/**
1123	+	* toString indicates current lock state
1124	+	*/
1125	+	public void testToString()      { testToString(false); }
1126	+	public void testToString_fair() { testToString(true); }
1127	+	public void testToString(boolean fair) {
1128	+	ReentrantLock lock = new ReentrantLock(fair);
1129	+	assertTrue(lock.toString().contains("Unlocked"));
1130	+	lock.lock();
1131	+	assertTrue(lock.toString().contains("Locked"));
1132	+	lock.unlock();
1133	+	assertTrue(lock.toString().contains("Unlocked"));
1134	+	}
1135		}

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