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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 1.50 by jsr166, Tue May 31 16:16:24 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	>	/**
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	<	private static long SHORT_DELAY_MS = 100;
167	<	private static long MEDIUM_DELAY_MS = 1000;
168	<	private static long LONG_DELAY_MS = 10000;
169	<
170	<	/*
171	<	* Unlocks an unlocked lock, throws Illegal Monitor State
172	<	*
173	<	*/
174	<
175	<	public void testIllegalMonitorStateException(){
176	<	ReentrantLock rl = new ReentrantLock();
177	<	try{
178	<	rl.unlock();
179	<	fail("Should of thown Illegal Monitor State Exception");
180	<
181	<	}catch(IllegalMonitorStateException sucess){}
182	<
183	<
184	<	}
185	<
186	<	/*
187	<	* makes a lock, locks it, tries to aquire the lock in another thread
188	<	* interrupts that thread and waits for an interrupted Exception to
189	<	* be thrown.
190	<	*/
191	<
192	<	public void testInterruptedException(){
193	<	final ReentrantLock lock = new ReentrantLock();
194	<	lock.lock();
195	<	Thread t = new Thread(new Runnable() {
196	<	public void run(){
197	<	try{
198	<	lock.lockInterruptibly();
199	<	fail("should throw");
200	<	}catch(InterruptedException sucess){}
201	<	}
202	<	});
203	<	t.start();
204	<	t.interrupt();
205	<	lock.unlock();
206	<	}
207	<
208	<	/*
209	<	* tests for interrupted exception on a timed wait
210	<	*
211	<	*/
212	<
213	<
214	<	public void testInterruptedException2(){
215	<	final ReentrantLock lock = new ReentrantLock();
216	<	lock.lock();
217	<	Thread t = new Thread(new Runnable() {
218	<	public void run(){
219	<	try{
220	<	lock.tryLock(1000,TimeUnit.MILLISECONDS);
221	<	fail("should throw");
222	<	}catch(InterruptedException sucess){}
223	<	}
224	<	});
225	<	t.start();
226	<	t.interrupt();
227	<	}
228	<
229	<
230	<	public void testGetHoldCount() {
231	<	ReentrantLock lock = new ReentrantLock();
232	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
233	<	lock.lock();
234	<	assertEquals(i,lock.getHoldCount());
235	<	}
236	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
237	<	lock.unlock();
238	<	assertEquals(i-1,lock.getHoldCount());
239	<	}
240	<	}
241	<
242	<
243	<
244	<
245	<	public void testIsLocked() {
246	<	final ReentrantLock lock = new ReentrantLock();
247	<	lock.lock();
248	<	assertTrue(lock.isLocked());
249	<	lock.unlock();
250	<	assertFalse(lock.isLocked());
251	<	Thread t = new Thread(new Runnable() {
252	<	public void run() {
253	<	lock.lock();
254	<	try {
255	<	Thread.sleep(SHORT_DELAY_MS * 2);
256	<	}
257	<	catch(Exception e) {}
258	<	lock.unlock();
259	<	}
260	<	});
261	<	try{
262	<	t.start();
263	<	Thread.sleep(SHORT_DELAY_MS);
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	<	t.join();
434	>	lock.lock();
435	>	assertTrue(lock.isLocked());
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	<	* current thread locks interruptibly the thread
484	<	* another thread tries to aquire the lock and blocks
485	<	* on the call. interrupt the attempted aquireLock
486	<	* assert that the first lock() call actually locked the lock
487	<	* assert that the current thread is the one holding the lock
488	<	*/
489	<
490	<	public void testLockedInterruptibly() {
491	<	final ReentrantLock lock = new ReentrantLock();
492	<	try {lock.lockInterruptibly();} catch(Exception e) {}
493	<	Thread t = new Thread(new Runnable() {
494	<	public void run() {
495	<	try {
496	<	lock.lockInterruptibly();
497	<	fail("Failed to generate an Interrupted Exception");
498	<	}
147	<	catch(InterruptedException e) {}
148	<	}
149	<	});
150	<	t.start();
151	<	t.interrupt();
152	<	assertTrue(lock.isLocked());
153	<	assertTrue(lock.isHeldByCurrentThread());
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		}
155	–
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	+	* 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	+	}
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 locked = 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	+	locked.countDown();
746	+	c.await();
747	+	assertHasNoWaiters(lock, c);
748	+	assertFalse(lock.hasWaiters(c));
749	+	lock.unlock();
750	+	}});
751	+
752	+	await(locked);
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 doesn't abort on interrupt
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 locked = new CountDownLatch(1);
891	+	Thread t = newStartedThread(new CheckedRunnable() {
892	+	public void realRun() {
893	+	lock.lock();
894	+	locked.countDown();
895	+	c.awaitUninterruptibly();
896	+	assertTrue(Thread.interrupted());
897	+	lock.unlock();
898	+	}});
899	+
900	+	await(locked);
901	+	lock.lock();
902	+	lock.unlock();
903	+	t.interrupt();
904	+	long timeoutMillis = 10;
905	+	assertThreadStaysAlive(t, timeoutMillis);
906	+	lock.lock();
907	+	c.signal();
908	+	lock.unlock();
909	+	awaitTermination(t);
910	+	}
911	+
912	+	/**
913	+	* await/awaitNanos/awaitUntil is interruptible
914	+	*/
915	+	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
916	+	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
917	+	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
918	+	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
919	+	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
920	+	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
921	+	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
922	+	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
923	+	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
924	+	final PublicReentrantLock lock =
925	+	new PublicReentrantLock(fair);
926	+	final Condition c = lock.newCondition();
927	+	final CountDownLatch locked = new CountDownLatch(1);
928	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
929	+	public void realRun() throws InterruptedException {
930	+	lock.lock();
931	+	assertLockedByMoi(lock);
932	+	assertHasNoWaiters(lock, c);
933	+	locked.countDown();
934	+	try {
935	+	await(c, awaitMethod);
936	+	} finally {
937	+	assertLockedByMoi(lock);
938	+	assertHasNoWaiters(lock, c);
939	+	lock.unlock();
940	+	assertFalse(Thread.interrupted());
941	+	}
942	+	}});
943	+
944	+	await(locked);
945	+	assertHasWaiters(lock, c, t);
946	+	t.interrupt();
947	+	awaitTermination(t);
948	+	assertNotLocked(lock);
949	+	}
950	+
951	+	/**
952	+	* signalAll wakes up all threads
953	+	*/
954	+	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
955	+	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
956	+	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
957	+	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
958	+	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
959	+	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
960	+	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
961	+	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
962	+	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
963	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
964	+	final Condition c = lock.newCondition();
965	+	final CountDownLatch locked = new CountDownLatch(2);
966	+	class Awaiter extends CheckedRunnable {
967	+	public void realRun() throws InterruptedException {
968	+	lock.lock();
969	+	locked.countDown();
970	+	await(c, awaitMethod);
971	+	lock.unlock();
972	+	}
973	+	}
974	+
975	+	Thread t1 = newStartedThread(new Awaiter());
976	+	Thread t2 = newStartedThread(new Awaiter());
977	+
978	+	await(locked);
979	+	lock.lock();
980	+	assertHasWaiters(lock, c, t1, t2);
981	+	c.signalAll();
982	+	assertHasNoWaiters(lock, c);
983	+	lock.unlock();
984	+	awaitTermination(t1);
985	+	awaitTermination(t2);
986	+	}
987	+
988	+	/**
989	+	* signal wakes up waiting threads in FIFO order
990	+	*/
991	+	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
992	+	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
993	+	public void testSignalWakesFifo(boolean fair) {
994	+	final PublicReentrantLock lock =
995	+	new PublicReentrantLock(fair);
996	+	final Condition c = lock.newCondition();
997	+	final CountDownLatch locked1 = new CountDownLatch(1);
998	+	final CountDownLatch locked2 = new CountDownLatch(1);
999	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1000	+	public void realRun() throws InterruptedException {
1001	+	lock.lock();
1002	+	locked1.countDown();
1003	+	c.await();
1004	+	lock.unlock();
1005	+	}});
1006	+
1007	+	await(locked1);
1008	+
1009	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1010	+	public void realRun() throws InterruptedException {
1011	+	lock.lock();
1012	+	locked2.countDown();
1013	+	c.await();
1014	+	lock.unlock();
1015	+	}});
1016	+
1017	+	await(locked2);
1018	+
1019	+	lock.lock();
1020	+	assertHasWaiters(lock, c, t1, t2);
1021	+	assertFalse(lock.hasQueuedThreads());
1022	+	c.signal();
1023	+	assertHasWaiters(lock, c, t2);
1024	+	assertTrue(lock.hasQueuedThread(t1));
1025	+	assertFalse(lock.hasQueuedThread(t2));
1026	+	c.signal();
1027	+	assertHasNoWaiters(lock, c);
1028	+	assertTrue(lock.hasQueuedThread(t1));
1029	+	assertTrue(lock.hasQueuedThread(t2));
1030	+	lock.unlock();
1031	+	awaitTermination(t1);
1032	+	awaitTermination(t2);
1033	+	}
1034	+
1035	+	/**
1036	+	* await after multiple reentrant locking preserves lock count
1037	+	*/
1038	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1039	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1040	+	public void testAwaitLockCount(boolean fair) {
1041	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1042	+	final Condition c = lock.newCondition();
1043	+	final CountDownLatch locked = new CountDownLatch(2);
1044	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1045	+	public void realRun() throws InterruptedException {
1046	+	lock.lock();
1047	+	assertLockedByMoi(lock);
1048	+	assertEquals(1, lock.getHoldCount());
1049	+	locked.countDown();
1050	+	c.await();
1051	+	assertLockedByMoi(lock);
1052	+	assertEquals(1, lock.getHoldCount());
1053	+	lock.unlock();
1054	+	}});
1055	+
1056	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1057	+	public void realRun() throws InterruptedException {
1058	+	lock.lock();
1059	+	lock.lock();
1060	+	assertLockedByMoi(lock);
1061	+	assertEquals(2, lock.getHoldCount());
1062	+	locked.countDown();
1063	+	c.await();
1064	+	assertLockedByMoi(lock);
1065	+	assertEquals(2, lock.getHoldCount());
1066	+	lock.unlock();
1067	+	lock.unlock();
1068	+	}});
1069	+
1070	+	await(locked);
1071	+	lock.lock();
1072	+	assertHasWaiters(lock, c, t1, t2);
1073	+	assertEquals(1, lock.getHoldCount());
1074	+	c.signalAll();
1075	+	assertHasNoWaiters(lock, c);
1076	+	lock.unlock();
1077	+	awaitTermination(t1);
1078	+	awaitTermination(t2);
1079	+	}
1080	+
1081	+	/**
1082	+	* A serialized lock deserializes as unlocked
1083	+	*/
1084	+	public void testSerialization()      { testSerialization(false); }
1085	+	public void testSerialization_fair() { testSerialization(true); }
1086	+	public void testSerialization(boolean fair) {
1087	+	ReentrantLock lock = new ReentrantLock(fair);
1088	+	lock.lock();
1089	+
1090	+	ReentrantLock clone = serialClone(lock);
1091	+	assertEquals(lock.isFair(), clone.isFair());
1092	+	assertTrue(lock.isLocked());
1093	+	assertFalse(clone.isLocked());
1094	+	assertEquals(1, lock.getHoldCount());
1095	+	assertEquals(0, clone.getHoldCount());
1096	+	clone.lock();
1097	+	clone.lock();
1098	+	assertTrue(clone.isLocked());
1099	+	assertEquals(2, clone.getHoldCount());
1100	+	assertEquals(1, lock.getHoldCount());
1101	+	clone.unlock();
1102	+	clone.unlock();
1103	+	assertTrue(lock.isLocked());
1104	+	assertFalse(clone.isLocked());
1105	+	}
1106	+
1107	+	/**
1108	+	* toString indicates current lock state
1109	+	*/
1110	+	public void testToString()      { testToString(false); }
1111	+	public void testToString_fair() { testToString(true); }
1112	+	public void testToString(boolean fair) {
1113	+	ReentrantLock lock = new ReentrantLock(fair);
1114	+	assertTrue(lock.toString().contains("Unlocked"));
1115	+	lock.lock();
1116	+	assertTrue(lock.toString().contains("Locked"));
1117	+	lock.unlock();
1118	+	assertTrue(lock.toString().contains("Unlocked"));
1119	+	}
1120		}

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