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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.5 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.49 by jsr166, Tue May 24 23:40:14 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	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.util.*;
14		import java.io.*;
15
16		public class ReentrantLockTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
21	<	return new TestSuite(ReentrantLockTest.class);
21	>	return new TestSuite(ReentrantLockTest.class);
22		}
23
24	<	static int HOLD_COUNT_TEST_LIMIT = 20;
25	<
26	<	class InterruptibleLockRunnable implements Runnable {
24	>	/**
25	>	* A runnable calling lockInterruptibly
26	>	*/
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28		final ReentrantLock lock;
29		InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
30	<	public void run(){
31	<	try{
29	<	lock.lockInterruptibly();
30	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.lockInterruptibly();
32		}
33		}
34
35	<	// Same, except must interrupt
36	<	class InterruptedLockRunnable implements Runnable {
35	>	/**
36	>	* A runnable calling lockInterruptibly that expects to be
37	>	* interrupted
38	>	*/
39	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
40		final ReentrantLock lock;
41		InterruptedLockRunnable(ReentrantLock l) { lock = l; }
42	<	public void run(){
43	<	try{
40	<	lock.lockInterruptibly();
41	<	threadFail("should throw");
42	<	} catch(InterruptedException success){}
42	>	public void realRun() throws InterruptedException {
43	>	lock.lockInterruptibly();
44		}
45		}
46
47		/**
48	<	* To expose protected methods
48	>	* Subclass to expose protected methods
49		*/
50	<	static class MyReentrantLock extends ReentrantLock {
51	<	MyReentrantLock() { super(); }
52	<	public Collection<Thread> getQueuedThreads() {
53	<	return super.getQueuedThreads();
50	>	static class PublicReentrantLock extends ReentrantLock {
51	>	PublicReentrantLock() { super(); }
52	>	PublicReentrantLock(boolean fair) { super(fair); }
53	>	public Thread getOwner() {
54	>	return super.getOwner();
55		}
56	<	public ConditionObject newCondition() {
57	<	return new MyCondition(this);
56	>	public Collection<Thread> getQueuedThreads() {
57	>	return super.getQueuedThreads();
58		}
59	+	public Collection<Thread> getWaitingThreads(Condition c) {
60	+	return super.getWaitingThreads(c);
61	+	}
62	+	}
63
64	<	static class MyCondition extends ReentrantLock.ConditionObject {
65	<	MyCondition(MyReentrantLock l) { super(l); }
66	<	public Collection<Thread> getWaitingThreads() {
67	<	return super.getWaitingThreads();
68	<	}
64	>	/**
65	>	* Releases write lock, checking that it had a hold count of 1.
66	>	*/
67	>	void releaseLock(PublicReentrantLock lock) {
68	>	assertLockedByMoi(lock);
69	>	lock.unlock();
70	>	assertFalse(lock.isHeldByCurrentThread());
71	>	assertNotLocked(lock);
72	>	}
73	>
74	>	/**
75	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
76	>	*/
77	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
78	>	long startTime = System.nanoTime();
79	>	while (!lock.hasQueuedThread(t)) {
80	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
81	>	throw new AssertionFailedError("timed out");
82	>	Thread.yield();
83		}
84	+	assertTrue(t.isAlive());
85	+	assertTrue(lock.getOwner() != t);
86	+	}
87
88	+	/**
89	+	* Checks that lock is not locked.
90	+	*/
91	+	void assertNotLocked(PublicReentrantLock lock) {
92	+	assertFalse(lock.isLocked());
93	+	assertFalse(lock.isHeldByCurrentThread());
94	+	assertNull(lock.getOwner());
95	+	assertEquals(0, lock.getHoldCount());
96		}
97
98	<	/*
99	<	* Unlocking an unlocked lock throws IllegalMonitorStateException
98	>	/**
99	>	* Checks that lock is locked by the given thread.
100	>	*/
101	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
102	>	assertTrue(lock.isLocked());
103	>	assertSame(t, lock.getOwner());
104	>	assertEquals(t == Thread.currentThread(),
105	>	lock.isHeldByCurrentThread());
106	>	assertEquals(t == Thread.currentThread(),
107	>	lock.getHoldCount() > 0);
108	>	}
109	>
110	>	/**
111	>	* Checks that lock is locked by the current thread.
112	>	*/
113	>	void assertLockedByMoi(PublicReentrantLock lock) {
114	>	assertLockedBy(lock, Thread.currentThread());
115	>	}
116	>
117	>	/**
118	>	* Checks that condition c has no waiters.
119	>	*/
120	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
121	>	assertHasWaiters(lock, c, new Thread[] {});
122	>	}
123	>
124	>	/**
125	>	* Checks that condition c has exactly the given waiter threads.
126	>	*/
127	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
128	>	Thread... threads) {
129	>	lock.lock();
130	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
131	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
132	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
133	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
134	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
135	>	new HashSet<Thread>(Arrays.asList(threads)));
136	>	lock.unlock();
137	>	}
138	>
139	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
140	>
141	>	/**
142	>	* Awaits condition using the specified AwaitMethod.
143		*/
144	<	public void testIllegalMonitorStateException(){
145	<	ReentrantLock rl = new ReentrantLock();
146	<	try{
147	<	rl.unlock();
148	<	fail("Should of thown Illegal Monitor State Exception");
144	>	void await(Condition c, AwaitMethod awaitMethod)
145	>	throws InterruptedException {
146	>	long timeoutMillis = 2 * LONG_DELAY_MS;
147	>	switch (awaitMethod) {
148	>	case await:
149	>	c.await();
150	>	break;
151	>	case awaitTimed:
152	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
153	>	break;
154	>	case awaitNanos:
155	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
156	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
157	>	assertTrue(nanosRemaining > 0);
158	>	break;
159	>	case awaitUntil:
160	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
161	>	break;
162	>	}
163	>	}
164
165	<	} catch(IllegalMonitorStateException success){}
165	>	/**
166	>	* Constructor sets given fairness, and is in unlocked state
167	>	*/
168	>	public void testConstructor() {
169	>	PublicReentrantLock lock;
170	>
171	>	lock = new PublicReentrantLock();
172	>	assertFalse(lock.isFair());
173	>	assertNotLocked(lock);
174	>
175	>	lock = new PublicReentrantLock(true);
176	>	assertTrue(lock.isFair());
177	>	assertNotLocked(lock);
178	>
179	>	lock = new PublicReentrantLock(false);
180	>	assertFalse(lock.isFair());
181	>	assertNotLocked(lock);
182	>	}
183	>
184	>	/**
185	>	* locking an unlocked lock succeeds
186	>	*/
187	>	public void testLock()      { testLock(false); }
188	>	public void testLock_fair() { testLock(true); }
189	>	public void testLock(boolean fair) {
190	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
191	>	lock.lock();
192	>	assertLockedByMoi(lock);
193	>	releaseLock(lock);
194		}
195
196	<	/*
197	<	* lockInterruptibly is interruptible.
196	>	/**
197	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
198		*/
199	<	public void testInterruptedException(){
200	<	final ReentrantLock lock = new ReentrantLock();
201	<	lock.lock();
202	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
199	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
200	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
201	>	public void testUnlock_IMSE(boolean fair) {
202	>	ReentrantLock lock = new ReentrantLock(fair);
203		try {
87	–	t.start();
88	–	t.interrupt();
204		lock.unlock();
205	<	t.join();
206	<	} catch(Exception e){
207	<	fail("unexpected exception");
93	<	}
94	<	}
205	>	shouldThrow();
206	>	} catch (IllegalMonitorStateException success) {}
207	>	}
208
209	<	/*
210	<	* getLockQueueLength reports number of waiting threads
209	>	/**
210	>	* tryLock on an unlocked lock succeeds
211		*/
212	<	public void testgetLockQueueLength(){
213	<	final ReentrantLock lock = new ReentrantLock();
212	>	public void testTryLock()      { testTryLock(false); }
213	>	public void testTryLock_fair() { testTryLock(true); }
214	>	public void testTryLock(boolean fair) {
215	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
216	>	assertTrue(lock.tryLock());
217	>	assertLockedByMoi(lock);
218	>	assertTrue(lock.tryLock());
219	>	assertLockedByMoi(lock);
220	>	lock.unlock();
221	>	releaseLock(lock);
222	>	}
223	>
224	>	/**
225	>	* hasQueuedThreads reports whether there are waiting threads
226	>	*/
227	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
228	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
229	>	public void testHasQueuedThreads(boolean fair) {
230	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
231		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
232		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
233	<	try {
234	<	assertEquals(0, lock.getLockQueueLength());
235	<	lock.lock();
236	<	t1.start();
237	<	Thread.sleep(SHORT_DELAY_MS);
238	<	assertEquals(1, lock.getLockQueueLength());
239	<	t2.start();
240	<	Thread.sleep(SHORT_DELAY_MS);
241	<	assertEquals(2, lock.getLockQueueLength());
242	<	t1.interrupt();
243	<	Thread.sleep(SHORT_DELAY_MS);
244	<	assertEquals(1, lock.getLockQueueLength());
245	<	lock.unlock();
246	<	Thread.sleep(SHORT_DELAY_MS);
247	<	assertEquals(0, lock.getLockQueueLength());
248	<	t1.join();
119	<	t2.join();
120	<	} catch(Exception e){
121	<	fail("unexpected exception");
122	<	}
123	<	}
233	>	assertFalse(lock.hasQueuedThreads());
234	>	lock.lock();
235	>	assertFalse(lock.hasQueuedThreads());
236	>	t1.start();
237	>	waitForQueuedThread(lock, t1);
238	>	assertTrue(lock.hasQueuedThreads());
239	>	t2.start();
240	>	waitForQueuedThread(lock, t2);
241	>	assertTrue(lock.hasQueuedThreads());
242	>	t1.interrupt();
243	>	awaitTermination(t1);
244	>	assertTrue(lock.hasQueuedThreads());
245	>	lock.unlock();
246	>	awaitTermination(t2);
247	>	assertFalse(lock.hasQueuedThreads());
248	>	}
249
250	<	/*
251	<	* getQueuedThreads includes waiting threads
250	>	/**
251	>	* getQueueLength reports number of waiting threads
252		*/
253	<	public void testGetQueuedThreads(){
254	<	final MyReentrantLock lock = new MyReentrantLock();
253	>	public void testGetQueueLength()      { testGetQueueLength(false); }
254	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
255	>	public void testGetQueueLength(boolean fair) {
256	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
257		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
258		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
259	<	try {
260	<	assertTrue(lock.getQueuedThreads().isEmpty());
261	<	lock.lock();
262	<	assertTrue(lock.getQueuedThreads().isEmpty());
263	<	t1.start();
264	<	Thread.sleep(SHORT_DELAY_MS);
265	<	assertTrue(lock.getQueuedThreads().contains(t1));
266	<	t2.start();
267	<	Thread.sleep(SHORT_DELAY_MS);
268	<	assertTrue(lock.getQueuedThreads().contains(t1));
269	<	assertTrue(lock.getQueuedThreads().contains(t2));
270	<	t1.interrupt();
271	<	Thread.sleep(SHORT_DELAY_MS);
272	<	assertFalse(lock.getQueuedThreads().contains(t1));
273	<	assertTrue(lock.getQueuedThreads().contains(t2));
147	<	lock.unlock();
148	<	Thread.sleep(SHORT_DELAY_MS);
149	<	assertTrue(lock.getQueuedThreads().isEmpty());
150	<	t1.join();
151	<	t2.join();
152	<	} catch(Exception e){
153	<	fail("unexpected exception");
154	<	}
155	<	}
259	>	assertEquals(0, lock.getQueueLength());
260	>	lock.lock();
261	>	t1.start();
262	>	waitForQueuedThread(lock, t1);
263	>	assertEquals(1, lock.getQueueLength());
264	>	t2.start();
265	>	waitForQueuedThread(lock, t2);
266	>	assertEquals(2, lock.getQueueLength());
267	>	t1.interrupt();
268	>	awaitTermination(t1);
269	>	assertEquals(1, lock.getQueueLength());
270	>	lock.unlock();
271	>	awaitTermination(t2);
272	>	assertEquals(0, lock.getQueueLength());
273	>	}
274
275	+	/**
276	+	* hasQueuedThread(null) throws NPE
277	+	*/
278	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
279	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
280	+	public void testHasQueuedThreadNPE(boolean fair) {
281	+	final ReentrantLock lock = new ReentrantLock(fair);
282	+	try {
283	+	lock.hasQueuedThread(null);
284	+	shouldThrow();
285	+	} catch (NullPointerException success) {}
286	+	}
287
288	<	/*
289	<	* timed trylock is interruptible.
288	>	/**
289	>	* hasQueuedThread reports whether a thread is queued
290		*/
291	<	public void testInterruptedException2(){
292	<	final ReentrantLock lock = new ReentrantLock();
293	<	lock.lock();
294	<	Thread t = new Thread(new Runnable() {
295	<	public void run(){
296	<	try{
297	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
298	<	threadFail("should throw");
299	<	} catch(InterruptedException success){}
300	<	}
301	<	});
302	<	try {
303	<	t.start();
304	<	t.interrupt();
305	<	} catch(Exception e){
306	<	fail("unexpected exception");
307	<	}
291	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
292	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
293	>	public void testHasQueuedThread(boolean fair) {
294	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
295	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
296	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
297	>	assertFalse(lock.hasQueuedThread(t1));
298	>	assertFalse(lock.hasQueuedThread(t2));
299	>	lock.lock();
300	>	t1.start();
301	>	waitForQueuedThread(lock, t1);
302	>	assertTrue(lock.hasQueuedThread(t1));
303	>	assertFalse(lock.hasQueuedThread(t2));
304	>	t2.start();
305	>	waitForQueuedThread(lock, t2);
306	>	assertTrue(lock.hasQueuedThread(t1));
307	>	assertTrue(lock.hasQueuedThread(t2));
308	>	t1.interrupt();
309	>	awaitTermination(t1);
310	>	assertFalse(lock.hasQueuedThread(t1));
311	>	assertTrue(lock.hasQueuedThread(t2));
312	>	lock.unlock();
313	>	awaitTermination(t2);
314	>	assertFalse(lock.hasQueuedThread(t1));
315	>	assertFalse(lock.hasQueuedThread(t2));
316		}
317
318	+	/**
319	+	* getQueuedThreads includes waiting threads
320	+	*/
321	+	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
322	+	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
323	+	public void testGetQueuedThreads(boolean fair) {
324	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
325	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
326	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
327	+	assertTrue(lock.getQueuedThreads().isEmpty());
328	+	lock.lock();
329	+	assertTrue(lock.getQueuedThreads().isEmpty());
330	+	t1.start();
331	+	waitForQueuedThread(lock, t1);
332	+	assertEquals(1, lock.getQueuedThreads().size());
333	+	assertTrue(lock.getQueuedThreads().contains(t1));
334	+	t2.start();
335	+	waitForQueuedThread(lock, t2);
336	+	assertEquals(2, lock.getQueuedThreads().size());
337	+	assertTrue(lock.getQueuedThreads().contains(t1));
338	+	assertTrue(lock.getQueuedThreads().contains(t2));
339	+	t1.interrupt();
340	+	awaitTermination(t1);
341	+	assertFalse(lock.getQueuedThreads().contains(t1));
342	+	assertTrue(lock.getQueuedThreads().contains(t2));
343	+	assertEquals(1, lock.getQueuedThreads().size());
344	+	lock.unlock();
345	+	awaitTermination(t2);
346	+	assertTrue(lock.getQueuedThreads().isEmpty());
347	+	}
348
349		/**
350	<	* Trylock on a locked lock fails
350	>	* timed tryLock is interruptible
351		*/
352	<	public void testTryLockWhenLocked() {
353	<	final ReentrantLock lock = new ReentrantLock();
354	<	lock.lock();
355	<	Thread t = new Thread(new Runnable() {
356	<	public void run(){
357	<	threadAssertFalse(lock.tryLock());
358	<	}
359	<	});
360	<	try {
361	<	t.start();
362	<	t.join();
363	<	lock.unlock();
364	<	} catch(Exception e){
365	<	fail("unexpected exception");
366	<	}
199	<	}
352	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
353	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
354	>	public void testTryLock_Interruptible(boolean fair) {
355	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
356	>	lock.lock();
357	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
358	>	public void realRun() throws InterruptedException {
359	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
360	>	}});
361	>
362	>	waitForQueuedThread(lock, t);
363	>	t.interrupt();
364	>	awaitTermination(t);
365	>	releaseLock(lock);
366	>	}
367
368		/**
369	<	* Timed Trylock on a locked lock times out
369	>	* tryLock on a locked lock fails
370		*/
371	<	public void testTryLock_Timeout(){
372	<	final ReentrantLock lock = new ReentrantLock();
373	<	lock.lock();
374	<	Thread t = new Thread(new Runnable() {
375	<	public void run(){
376	<	try {
377	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
378	<	} catch (Exception ex) {
379	<	threadFail("unexpected exception");
380	<	}
381	<	}
382	<	});
383	<	try {
384	<	t.start();
385	<	t.join();
386	<	lock.unlock();
387	<	} catch(Exception e){
388	<	fail("unexpected exception");
389	<	}
390	<	}
391	<
371	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
372	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
373	>	public void testTryLockWhenLocked(boolean fair) {
374	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
375	>	lock.lock();
376	>	Thread t = newStartedThread(new CheckedRunnable() {
377	>	public void realRun() {
378	>	assertFalse(lock.tryLock());
379	>	}});
380	>
381	>	awaitTermination(t);
382	>	releaseLock(lock);
383	>	}
384	>
385	>	/**
386	>	* Timed tryLock on a locked lock times out
387	>	*/
388	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
389	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
390	>	public void testTryLock_Timeout(boolean fair) {
391	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
392	>	lock.lock();
393	>	Thread t = newStartedThread(new CheckedRunnable() {
394	>	public void realRun() throws InterruptedException {
395	>	long startTime = System.nanoTime();
396	>	long timeoutMillis = 10;
397	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
398	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
399	>	}});
400	>
401	>	awaitTermination(t);
402	>	releaseLock(lock);
403	>	}
404	>
405		/**
406		* getHoldCount returns number of recursive holds
407		*/
408	<	public void testGetHoldCount() {
409	<	ReentrantLock lock = new ReentrantLock();
410	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
411	<	lock.lock();
412	<	assertEquals(i,lock.getHoldCount());
413	<	}
414	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
415	<	lock.unlock();
416	<	assertEquals(i-1,lock.getHoldCount());
417	<	}
408	>	public void testGetHoldCount()      { testGetHoldCount(false); }
409	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
410	>	public void testGetHoldCount(boolean fair) {
411	>	ReentrantLock lock = new ReentrantLock(fair);
412	>	for (int i = 1; i <= SIZE; i++) {
413	>	lock.lock();
414	>	assertEquals(i, lock.getHoldCount());
415	>	}
416	>	for (int i = SIZE; i > 0; i--) {
417	>	lock.unlock();
418	>	assertEquals(i-1, lock.getHoldCount());
419	>	}
420		}
421	<
240	<
421	>
422		/**
423		* isLocked is true when locked and false when not
424		*/
425	<	public void testIsLocked() {
426	<	final ReentrantLock lock = new ReentrantLock();
427	<	lock.lock();
428	<	assertTrue(lock.isLocked());
429	<	lock.unlock();
430	<	assertFalse(lock.isLocked());
431	<	Thread t = new Thread(new Runnable() {
251	<	public void run() {
252	<	lock.lock();
253	<	try {
254	<	Thread.sleep(SMALL_DELAY_MS);
255	<	}
256	<	catch(Exception e) {
257	<	threadFail("unexpected exception");
258	<	}
259	<	lock.unlock();
260	<	}
261	<	});
262	<	try{
263	<	t.start();
264	<	Thread.sleep(SHORT_DELAY_MS);
425	>	public void testIsLocked()      { testIsLocked(false); }
426	>	public void testIsLocked_fair() { testIsLocked(true); }
427	>	public void testIsLocked(boolean fair) {
428	>	try {
429	>	final ReentrantLock lock = new ReentrantLock(fair);
430	>	assertFalse(lock.isLocked());
431	>	lock.lock();
432		assertTrue(lock.isLocked());
433	<	t.join();
433	>	lock.lock();
434	>	assertTrue(lock.isLocked());
435	>	lock.unlock();
436	>	assertTrue(lock.isLocked());
437	>	lock.unlock();
438		assertFalse(lock.isLocked());
439	<	} catch(Exception e){
440	<	fail("unexpected exception");
439	>	final CyclicBarrier barrier = new CyclicBarrier(2);
440	>	Thread t = newStartedThread(new CheckedRunnable() {
441	>	public void realRun() throws Exception {
442	>	lock.lock();
443	>	assertTrue(lock.isLocked());
444	>	barrier.await();
445	>	barrier.await();
446	>	lock.unlock();
447	>	}});
448	>
449	>	barrier.await();
450	>	assertTrue(lock.isLocked());
451	>	barrier.await();
452	>	awaitTermination(t);
453	>	assertFalse(lock.isLocked());
454	>	} catch (Exception e) {
455	>	threadUnexpectedException(e);
456		}
457		}
458
273	–
459		/**
460		* lockInterruptibly succeeds when unlocked, else is interruptible
461		*/
462	<	public void testLockInterruptibly() {
463	<	final ReentrantLock lock = new ReentrantLock();
464	<	try {
465	<	lock.lockInterruptibly();
281	<	} catch(Exception e) {
282	<	fail("unexpected exception");
283	<	}
284	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
462	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
463	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
464	>	public void testLockInterruptibly(boolean fair) {
465	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
466		try {
467	<	t.start();
468	<	t.interrupt();
469	<	assertTrue(lock.isLocked());
289	<	assertTrue(lock.isHeldByCurrentThread());
290	<	t.join();
291	<	} catch(Exception e){
292	<	fail("unexpected exception");
467	>	lock.lockInterruptibly();
468	>	} catch (InterruptedException ie) {
469	>	threadUnexpectedException(ie);
470		}
471	+	assertLockedByMoi(lock);
472	+	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
473	+	waitForQueuedThread(lock, t);
474	+	t.interrupt();
475	+	assertTrue(lock.isLocked());
476	+	assertTrue(lock.isHeldByCurrentThread());
477	+	awaitTermination(t);
478	+	releaseLock(lock);
479		}
480
481	<	public void testAwait_IllegalMonitor() {
482	<	final ReentrantLock lock = new ReentrantLock();
481	>	/**
482	>	* Calling await without holding lock throws IllegalMonitorStateException
483	>	*/
484	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
485	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
486	>	public void testAwait_IMSE(boolean fair) {
487	>	final ReentrantLock lock = new ReentrantLock(fair);
488		final Condition c = lock.newCondition();
489	<	try {
490	<	c.await();
491	<	fail("should throw");
492	<	}
493	<	catch (IllegalMonitorStateException success) {
494	<	}
495	<	catch (Exception ex) {
496	<	fail("should throw IMSE");
489	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
490	>	long startTime = System.nanoTime();
491	>	try {
492	>	await(c, awaitMethod);
493	>	shouldThrow();
494	>	} catch (IllegalMonitorStateException success) {
495	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
496	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
497		}
498		}
499
500	<	public void testSignal_IllegalMonitor() {
501	<	final ReentrantLock lock = new ReentrantLock();
500	>	/**
501	>	* Calling signal without holding lock throws IllegalMonitorStateException
502	>	*/
503	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
504	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
505	>	public void testSignal_IMSE(boolean fair) {
506	>	final ReentrantLock lock = new ReentrantLock(fair);
507		final Condition c = lock.newCondition();
508		try {
509		c.signal();
510	<	fail("should throw");
511	<	}
317	<	catch (IllegalMonitorStateException success) {
318	<	}
319	<	catch (Exception ex) {
320	<	fail("should throw IMSE");
321	<	}
510	>	shouldThrow();
511	>	} catch (IllegalMonitorStateException success) {}
512		}
513
514	<	public void testAwaitNanos_Timeout() {
515	<	final ReentrantLock lock = new ReentrantLock();
516	<	final Condition c = lock.newCondition();
514	>	/**
515	>	* awaitNanos without a signal times out
516	>	*/
517	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
518	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
519	>	public void testAwaitNanos_Timeout(boolean fair) {
520		try {
521	+	final ReentrantLock lock = new ReentrantLock(fair);
522	+	final Condition c = lock.newCondition();
523		lock.lock();
524	<	long t = c.awaitNanos(100);
525	<	assertTrue(t <= 0);
524	>	long startTime = System.nanoTime();
525	>	long timeoutMillis = 10;
526	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
527	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
528	>	assertTrue(nanosRemaining <= 0);
529	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
530		lock.unlock();
531	<	}
532	<	catch (Exception ex) {
334	<	fail("unexpected exception");
531	>	} catch (InterruptedException e) {
532	>	threadUnexpectedException(e);
533		}
534		}
535
536	<	public void testAwait_Timeout() {
537	<	final ReentrantLock lock = new ReentrantLock();
538	<	final Condition c = lock.newCondition();
536	>	/**
537	>	* timed await without a signal times out
538	>	*/
539	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
540	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
541	>	public void testAwait_Timeout(boolean fair) {
542		try {
543	+	final ReentrantLock lock = new ReentrantLock(fair);
544	+	final Condition c = lock.newCondition();
545		lock.lock();
546	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
546	>	long startTime = System.nanoTime();
547	>	long timeoutMillis = 10;
548	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
549	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
550		lock.unlock();
551	<	}
552	<	catch (Exception ex) {
347	<	fail("unexpected exception");
551	>	} catch (InterruptedException e) {
552	>	threadUnexpectedException(e);
553		}
554		}
555
556	<	public void testAwaitUntil_Timeout() {
557	<	final ReentrantLock lock = new ReentrantLock();
558	<	final Condition c = lock.newCondition();
556	>	/**
557	>	* awaitUntil without a signal times out
558	>	*/
559	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
560	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
561	>	public void testAwaitUntil_Timeout(boolean fair) {
562		try {
563	+	final ReentrantLock lock = new ReentrantLock(fair);
564	+	final Condition c = lock.newCondition();
565		lock.lock();
566	+	long startTime = System.nanoTime();
567	+	long timeoutMillis = 10;
568		java.util.Date d = new java.util.Date();
569	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
569	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
570	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
571		lock.unlock();
572	<	}
573	<	catch (Exception ex) {
361	<	fail("unexpected exception");
572	>	} catch (InterruptedException e) {
573	>	threadUnexpectedException(e);
574		}
575		}
576
577	<	public void testAwait() {
578	<	final ReentrantLock lock = new ReentrantLock();
579	<	final ReentrantLock.ConditionObject c = lock.newCondition();
580	<	Thread t = new Thread(new Runnable() {
581	<	public void run() {
582	<	try {
583	<	lock.lock();
584	<	c.await();
585	<	lock.unlock();
586	<	}
587	<	catch(InterruptedException e) {
588	<	threadFail("unexpected exception");
589	<	}
590	<	}
591	<	});
577	>	/**
578	>	* await returns when signalled
579	>	*/
580	>	public void testAwait()      { testAwait(false); }
581	>	public void testAwait_fair() { testAwait(true); }
582	>	public void testAwait(boolean fair) {
583	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
584	>	final Condition c = lock.newCondition();
585	>	final CountDownLatch locked = new CountDownLatch(1);
586	>	Thread t = newStartedThread(new CheckedRunnable() {
587	>	public void realRun() throws InterruptedException {
588	>	lock.lock();
589	>	locked.countDown();
590	>	c.await();
591	>	lock.unlock();
592	>	}});
593	>
594	>	await(locked);
595	>	lock.lock();
596	>	assertHasWaiters(lock, c, t);
597	>	c.signal();
598	>	assertHasNoWaiters(lock, c);
599	>	assertTrue(t.isAlive());
600	>	lock.unlock();
601	>	awaitTermination(t);
602	>	}
603
604	<	try {
605	<	t.start();
606	<	Thread.sleep(SHORT_DELAY_MS);
607	<	lock.lock();
608	<	c.signal();
609	<	lock.unlock();
610	<	t.join(SHORT_DELAY_MS);
611	<	assertFalse(t.isAlive());
612	<	}
613	<	catch (Exception ex) {
614	<	fail("unexpected exception");
392	<	}
604	>	/**
605	>	* hasWaiters throws NPE if null
606	>	*/
607	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
608	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
609	>	public void testHasWaitersNPE(boolean fair) {
610	>	final ReentrantLock lock = new ReentrantLock(fair);
611	>	try {
612	>	lock.hasWaiters(null);
613	>	shouldThrow();
614	>	} catch (NullPointerException success) {}
615		}
616
617	<	public void testHasWaiters() {
618	<	final ReentrantLock lock = new ReentrantLock();
619	<	final ReentrantLock.ConditionObject c = lock.newCondition();
620	<	Thread t = new Thread(new Runnable() {
621	<	public void run() {
622	<	try {
623	<	lock.lock();
624	<	threadAssertFalse(c.hasWaiters());
625	<	threadAssertEquals(0, c.getWaitQueueLength());
626	<	c.await();
627	<	lock.unlock();
628	<	}
407	<	catch(InterruptedException e) {
408	<	threadFail("unexpected exception");
409	<	}
410	<	}
411	<	});
617	>	/**
618	>	* getWaitQueueLength throws NPE if null
619	>	*/
620	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
621	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
622	>	public void testGetWaitQueueLengthNPE(boolean fair) {
623	>	final ReentrantLock lock = new ReentrantLock(fair);
624	>	try {
625	>	lock.getWaitQueueLength(null);
626	>	shouldThrow();
627	>	} catch (NullPointerException success) {}
628	>	}
629
630	<	try {
631	<	t.start();
632	<	Thread.sleep(SHORT_DELAY_MS);
633	<	lock.lock();
634	<	assertTrue(c.hasWaiters());
635	<	assertEquals(1, c.getWaitQueueLength());
636	<	c.signal();
637	<	lock.unlock();
638	<	Thread.sleep(SHORT_DELAY_MS);
639	<	lock.lock();
640	<	assertFalse(c.hasWaiters());
424	<	assertEquals(0, c.getWaitQueueLength());
425	<	lock.unlock();
426	<	t.join(SHORT_DELAY_MS);
427	<	assertFalse(t.isAlive());
428	<	}
429	<	catch (Exception ex) {
430	<	fail("unexpected exception");
431	<	}
630	>	/**
631	>	* getWaitingThreads throws NPE if null
632	>	*/
633	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
634	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
635	>	public void testGetWaitingThreadsNPE(boolean fair) {
636	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
637	>	try {
638	>	lock.getWaitingThreads(null);
639	>	shouldThrow();
640	>	} catch (NullPointerException success) {}
641		}
642
643	<	public void testGetWaitQueueLength() {
644	<	final ReentrantLock lock = new ReentrantLock();
645	<	final ReentrantLock.ConditionObject c = lock.newCondition();
646	<	Thread t1 = new Thread(new Runnable() {
647	<	public void run() {
648	<	try {
649	<	lock.lock();
650	<	threadAssertFalse(c.hasWaiters());
651	<	threadAssertEquals(0, c.getWaitQueueLength());
652	<	c.await();
653	<	lock.unlock();
654	<	}
655	<	catch(InterruptedException e) {
656	<	threadFail("unexpected exception");
448	<	}
449	<	}
450	<	});
451	<
452	<	Thread t2 = new Thread(new Runnable() {
453	<	public void run() {
454	<	try {
455	<	lock.lock();
456	<	threadAssertTrue(c.hasWaiters());
457	<	threadAssertEquals(1, c.getWaitQueueLength());
458	<	c.await();
459	<	lock.unlock();
460	<	}
461	<	catch(InterruptedException e) {
462	<	threadFail("unexpected exception");
463	<	}
464	<	}
465	<	});
643	>	/**
644	>	* hasWaiters throws IllegalArgumentException if not owned
645	>	*/
646	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
647	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
648	>	public void testHasWaitersIAE(boolean fair) {
649	>	final ReentrantLock lock = new ReentrantLock(fair);
650	>	final Condition c = lock.newCondition();
651	>	final ReentrantLock lock2 = new ReentrantLock(fair);
652	>	try {
653	>	lock2.hasWaiters(c);
654	>	shouldThrow();
655	>	} catch (IllegalArgumentException success) {}
656	>	}
657
658	+	/**
659	+	* hasWaiters throws IllegalMonitorStateException if not locked
660	+	*/
661	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
662	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
663	+	public void testHasWaitersIMSE(boolean fair) {
664	+	final ReentrantLock lock = new ReentrantLock(fair);
665	+	final Condition c = lock.newCondition();
666		try {
667	<	t1.start();
668	<	Thread.sleep(SHORT_DELAY_MS);
669	<	t2.start();
471	<	Thread.sleep(SHORT_DELAY_MS);
472	<	lock.lock();
473	<	assertTrue(c.hasWaiters());
474	<	assertEquals(2, c.getWaitQueueLength());
475	<	c.signalAll();
476	<	lock.unlock();
477	<	Thread.sleep(SHORT_DELAY_MS);
478	<	lock.lock();
479	<	assertFalse(c.hasWaiters());
480	<	assertEquals(0, c.getWaitQueueLength());
481	<	lock.unlock();
482	<	t1.join(SHORT_DELAY_MS);
483	<	t2.join(SHORT_DELAY_MS);
484	<	assertFalse(t1.isAlive());
485	<	assertFalse(t2.isAlive());
486	<	}
487	<	catch (Exception ex) {
488	<	fail("unexpected exception");
489	<	}
667	>	lock.hasWaiters(c);
668	>	shouldThrow();
669	>	} catch (IllegalMonitorStateException success) {}
670		}
671
672	<	public void testGetWaitingThreads() {
673	<	final MyReentrantLock lock = new MyReentrantLock();
674	<	final MyReentrantLock.MyCondition c = (MyReentrantLock.MyCondition)lock.newCondition();
675	<	Thread t1 = new Thread(new Runnable() {
676	<	public void run() {
677	<	try {
678	<	lock.lock();
679	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
680	<	c.await();
681	<	lock.unlock();
682	<	}
683	<	catch(InterruptedException e) {
684	<	threadFail("unexpected exception");
685	<	}
506	<	}
507	<	});
508	<
509	<	Thread t2 = new Thread(new Runnable() {
510	<	public void run() {
511	<	try {
512	<	lock.lock();
513	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
514	<	c.await();
515	<	lock.unlock();
516	<	}
517	<	catch(InterruptedException e) {
518	<	threadFail("unexpected exception");
519	<	}
520	<	}
521	<	});
672	>	/**
673	>	* getWaitQueueLength throws IllegalArgumentException if not owned
674	>	*/
675	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
676	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
677	>	public void testGetWaitQueueLengthIAE(boolean fair) {
678	>	final ReentrantLock lock = new ReentrantLock(fair);
679	>	final Condition c = lock.newCondition();
680	>	final ReentrantLock lock2 = new ReentrantLock(fair);
681	>	try {
682	>	lock2.getWaitQueueLength(c);
683	>	shouldThrow();
684	>	} catch (IllegalArgumentException success) {}
685	>	}
686
687	+	/**
688	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
689	+	*/
690	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
691	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
692	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
693	+	final ReentrantLock lock = new ReentrantLock(fair);
694	+	final Condition c = lock.newCondition();
695		try {
696	<	lock.lock();
697	<	assertTrue(c.getWaitingThreads().isEmpty());
698	<	lock.unlock();
527	<	t1.start();
528	<	Thread.sleep(SHORT_DELAY_MS);
529	<	t2.start();
530	<	Thread.sleep(SHORT_DELAY_MS);
531	<	lock.lock();
532	<	assertTrue(c.hasWaiters());
533	<	assertTrue(c.getWaitingThreads().contains(t1));
534	<	assertTrue(c.getWaitingThreads().contains(t2));
535	<	c.signalAll();
536	<	lock.unlock();
537	<	Thread.sleep(SHORT_DELAY_MS);
538	<	lock.lock();
539	<	assertFalse(c.hasWaiters());
540	<	assertTrue(c.getWaitingThreads().isEmpty());
541	<	lock.unlock();
542	<	t1.join(SHORT_DELAY_MS);
543	<	t2.join(SHORT_DELAY_MS);
544	<	assertFalse(t1.isAlive());
545	<	assertFalse(t2.isAlive());
546	<	}
547	<	catch (Exception ex) {
548	<	fail("unexpected exception");
549	<	}
696	>	lock.getWaitQueueLength(c);
697	>	shouldThrow();
698	>	} catch (IllegalMonitorStateException success) {}
699		}
700
701	<	public void testAwaitUninterruptibly() {
702	<	final ReentrantLock lock = new ReentrantLock();
701	>	/**
702	>	* getWaitingThreads throws IllegalArgumentException if not owned
703	>	*/
704	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
705	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
706	>	public void testGetWaitingThreadsIAE(boolean fair) {
707	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
708		final Condition c = lock.newCondition();
709	<	Thread t = new Thread(new Runnable() {
710	<	public void run() {
711	<	lock.lock();
712	<	c.awaitUninterruptibly();
713	<	lock.unlock();
714	<	}
561	<	});
709	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
710	>	try {
711	>	lock2.getWaitingThreads(c);
712	>	shouldThrow();
713	>	} catch (IllegalArgumentException success) {}
714	>	}
715
716	+	/**
717	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
718	+	*/
719	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
720	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
721	+	public void testGetWaitingThreadsIMSE(boolean fair) {
722	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
723	+	final Condition c = lock.newCondition();
724		try {
725	<	t.start();
726	<	Thread.sleep(SHORT_DELAY_MS);
727	<	t.interrupt();
567	<	lock.lock();
568	<	c.signal();
569	<	lock.unlock();
570	<	t.join(SHORT_DELAY_MS);
571	<	assertFalse(t.isAlive());
572	<	}
573	<	catch (Exception ex) {
574	<	fail("unexpected exception");
575	<	}
725	>	lock.getWaitingThreads(c);
726	>	shouldThrow();
727	>	} catch (IllegalMonitorStateException success) {}
728		}
729
730	<	public void testAwait_Interrupt() {
731	<	final ReentrantLock lock = new ReentrantLock();
730	>	/**
731	>	* hasWaiters returns true when a thread is waiting, else false
732	>	*/
733	>	public void testHasWaiters()      { testHasWaiters(false); }
734	>	public void testHasWaiters_fair() { testHasWaiters(true); }
735	>	public void testHasWaiters(boolean fair) {
736	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
737		final Condition c = lock.newCondition();
738	<	Thread t = new Thread(new Runnable() {
739	<	public void run() {
740	<	try {
741	<	lock.lock();
742	<	c.await();
743	<	lock.unlock();
744	<	threadFail("should throw");
745	<	}
746	<	catch(InterruptedException success) {
747	<	}
748	<	}
749	<	});
738	>	final CountDownLatch locked = new CountDownLatch(1);
739	>	Thread t = newStartedThread(new CheckedRunnable() {
740	>	public void realRun() throws InterruptedException {
741	>	lock.lock();
742	>	assertHasNoWaiters(lock, c);
743	>	assertFalse(lock.hasWaiters(c));
744	>	locked.countDown();
745	>	c.await();
746	>	assertHasNoWaiters(lock, c);
747	>	assertFalse(lock.hasWaiters(c));
748	>	lock.unlock();
749	>	}});
750	>
751	>	await(locked);
752	>	lock.lock();
753	>	assertHasWaiters(lock, c, t);
754	>	assertTrue(lock.hasWaiters(c));
755	>	c.signal();
756	>	assertHasNoWaiters(lock, c);
757	>	assertFalse(lock.hasWaiters(c));
758	>	lock.unlock();
759	>	awaitTermination(t);
760	>	assertHasNoWaiters(lock, c);
761	>	}
762
763	<	try {
764	<	t.start();
765	<	Thread.sleep(SHORT_DELAY_MS);
766	<	t.interrupt();
767	<	t.join(SHORT_DELAY_MS);
768	<	assertFalse(t.isAlive());
769	<	}
770	<	catch (Exception ex) {
771	<	fail("unexpected exception");
772	<	}
763	>	/**
764	>	* getWaitQueueLength returns number of waiting threads
765	>	*/
766	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
767	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
768	>	public void testGetWaitQueueLength(boolean fair) {
769	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
770	>	final Condition c = lock.newCondition();
771	>	final CountDownLatch locked1 = new CountDownLatch(1);
772	>	final CountDownLatch locked2 = new CountDownLatch(1);
773	>	Thread t1 = new Thread(new CheckedRunnable() {
774	>	public void realRun() throws InterruptedException {
775	>	lock.lock();
776	>	assertFalse(lock.hasWaiters(c));
777	>	assertEquals(0, lock.getWaitQueueLength(c));
778	>	locked1.countDown();
779	>	c.await();
780	>	lock.unlock();
781	>	}});
782	>
783	>	Thread t2 = new Thread(new CheckedRunnable() {
784	>	public void realRun() throws InterruptedException {
785	>	lock.lock();
786	>	assertTrue(lock.hasWaiters(c));
787	>	assertEquals(1, lock.getWaitQueueLength(c));
788	>	locked2.countDown();
789	>	c.await();
790	>	lock.unlock();
791	>	}});
792	>
793	>	lock.lock();
794	>	assertEquals(0, lock.getWaitQueueLength(c));
795	>	lock.unlock();
796	>
797	>	t1.start();
798	>	await(locked1);
799	>
800	>	lock.lock();
801	>	assertHasWaiters(lock, c, t1);
802	>	assertEquals(1, lock.getWaitQueueLength(c));
803	>	lock.unlock();
804	>
805	>	t2.start();
806	>	await(locked2);
807	>
808	>	lock.lock();
809	>	assertHasWaiters(lock, c, t1, t2);
810	>	assertEquals(2, lock.getWaitQueueLength(c));
811	>	c.signalAll();
812	>	assertHasNoWaiters(lock, c);
813	>	lock.unlock();
814	>
815	>	awaitTermination(t1);
816	>	awaitTermination(t2);
817	>
818	>	assertHasNoWaiters(lock, c);
819		}
820
821	<	public void testAwaitNanos_Interrupt() {
822	<	final ReentrantLock lock = new ReentrantLock();
821	>	/**
822	>	* getWaitingThreads returns only and all waiting threads
823	>	*/
824	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
825	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
826	>	public void testGetWaitingThreads(boolean fair) {
827	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
828		final Condition c = lock.newCondition();
829	<	Thread t = new Thread(new Runnable() {
830	<	public void run() {
831	<	try {
832	<	lock.lock();
833	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
834	<	lock.unlock();
835	<	threadFail("should throw");
836	<	}
837	<	catch(InterruptedException success) {
838	<	}
839	<	}
840	<	});
841	<
842	<	try {
843	<	t.start();
844	<	Thread.sleep(SHORT_DELAY_MS);
845	<	t.interrupt();
846	<	t.join(SHORT_DELAY_MS);
847	<	assertFalse(t.isAlive());
848	<	}
849	<	catch (Exception ex) {
850	<	fail("unexpected exception");
851	<	}
829	>	final CountDownLatch locked1 = new CountDownLatch(1);
830	>	final CountDownLatch locked2 = new CountDownLatch(1);
831	>	Thread t1 = new Thread(new CheckedRunnable() {
832	>	public void realRun() throws InterruptedException {
833	>	lock.lock();
834	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
835	>	locked1.countDown();
836	>	c.await();
837	>	lock.unlock();
838	>	}});
839	>
840	>	Thread t2 = new Thread(new CheckedRunnable() {
841	>	public void realRun() throws InterruptedException {
842	>	lock.lock();
843	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
844	>	locked2.countDown();
845	>	c.await();
846	>	lock.unlock();
847	>	}});
848	>
849	>	lock.lock();
850	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
851	>	lock.unlock();
852	>
853	>	t1.start();
854	>	await(locked1);
855	>
856	>	lock.lock();
857	>	assertHasWaiters(lock, c, t1);
858	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
859	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
860	>	assertEquals(1, lock.getWaitingThreads(c).size());
861	>	lock.unlock();
862	>
863	>	t2.start();
864	>	await(locked2);
865	>
866	>	lock.lock();
867	>	assertHasWaiters(lock, c, t1, t2);
868	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
869	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
870	>	assertEquals(2, lock.getWaitingThreads(c).size());
871	>	c.signalAll();
872	>	assertHasNoWaiters(lock, c);
873	>	lock.unlock();
874	>
875	>	awaitTermination(t1);
876	>	awaitTermination(t2);
877	>
878	>	assertHasNoWaiters(lock, c);
879		}
880
881	<	public void testAwaitUntil_Interrupt() {
882	<	final ReentrantLock lock = new ReentrantLock();
883	<	final Condition c = lock.newCondition();
884	<	Thread t = new Thread(new Runnable() {
885	<	public void run() {
886	<	try {
887	<	lock.lock();
888	<	java.util.Date d = new java.util.Date();
889	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
890	<	lock.unlock();
891	<	threadFail("should throw");
892	<	}
893	<	catch(InterruptedException success) {
894	<	}
895	<	}
896	<	});
881	>	/**
882	>	* awaitUninterruptibly doesn't abort on interrupt
883	>	*/
884	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
885	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
886	>	public void testAwaitUninterruptibly(boolean fair) {
887	>	final ReentrantLock lock = new ReentrantLock(fair);
888	>	final Condition c = lock.newCondition();
889	>	final CountDownLatch locked = new CountDownLatch(1);
890	>	Thread t = newStartedThread(new CheckedRunnable() {
891	>	public void realRun() {
892	>	lock.lock();
893	>	locked.countDown();
894	>	c.awaitUninterruptibly();
895	>	assertTrue(Thread.interrupted());
896	>	lock.unlock();
897	>	}});
898	>
899	>	await(locked);
900	>	lock.lock();
901	>	lock.unlock();
902	>	t.interrupt();
903	>	long timeoutMillis = 10;
904	>	assertThreadStaysAlive(t, timeoutMillis);
905	>	lock.lock();
906	>	c.signal();
907	>	lock.unlock();
908	>	awaitTermination(t);
909	>	}
910
911	<	try {
912	<	t.start();
913	<	Thread.sleep(SHORT_DELAY_MS);
914	<	t.interrupt();
915	<	t.join(SHORT_DELAY_MS);
916	<	assertFalse(t.isAlive());
917	<	}
918	<	catch (Exception ex) {
919	<	fail("unexpected exception");
911	>	/**
912	>	* await/awaitNanos/awaitUntil is interruptible
913	>	*/
914	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
915	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
916	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
917	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
918	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
919	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
920	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
921	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
922	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
923	>	final PublicReentrantLock lock =
924	>	new PublicReentrantLock(fair);
925	>	final Condition c = lock.newCondition();
926	>	final CountDownLatch locked = new CountDownLatch(1);
927	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
928	>	public void realRun() throws InterruptedException {
929	>	lock.lock();
930	>	assertLockedByMoi(lock);
931	>	assertHasNoWaiters(lock, c);
932	>	locked.countDown();
933	>	try {
934	>	await(c, awaitMethod);
935	>	} finally {
936	>	assertLockedByMoi(lock);
937	>	assertHasNoWaiters(lock, c);
938	>	lock.unlock();
939	>	assertFalse(Thread.interrupted());
940	>	}
941	>	}});
942	>
943	>	await(locked);
944	>	assertHasWaiters(lock, c, t);
945	>	t.interrupt();
946	>	awaitTermination(t);
947	>	assertNotLocked(lock);
948	>	}
949	>
950	>	/**
951	>	* signalAll wakes up all threads
952	>	*/
953	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
954	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
955	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
956	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
957	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
958	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
959	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
960	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
961	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
962	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
963	>	final Condition c = lock.newCondition();
964	>	final CountDownLatch locked = new CountDownLatch(2);
965	>	class Awaiter extends CheckedRunnable {
966	>	public void realRun() throws InterruptedException {
967	>	lock.lock();
968	>	locked.countDown();
969	>	await(c, awaitMethod);
970	>	lock.unlock();
971	>	}
972		}
973	+
974	+	Thread t1 = newStartedThread(new Awaiter());
975	+	Thread t2 = newStartedThread(new Awaiter());
976	+
977	+	await(locked);
978	+	lock.lock();
979	+	assertHasWaiters(lock, c, t1, t2);
980	+	c.signalAll();
981	+	assertHasNoWaiters(lock, c);
982	+	lock.unlock();
983	+	awaitTermination(t1);
984	+	awaitTermination(t2);
985		}
986
987	<	public void testSignalAll() {
988	<	final ReentrantLock lock = new ReentrantLock();
987	>	/**
988	>	* signal wakes up waiting threads in FIFO order
989	>	*/
990	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
991	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
992	>	public void testSignalWakesFifo(boolean fair) {
993	>	final PublicReentrantLock lock =
994	>	new PublicReentrantLock(fair);
995		final Condition c = lock.newCondition();
996	<	Thread t1 = new Thread(new Runnable() {
997	<	public void run() {
998	<	try {
999	<	lock.lock();
1000	<	c.await();
1001	<	lock.unlock();
1002	<	}
1003	<	catch(InterruptedException e) {
1004	<	threadFail("unexpected exception");
1005	<	}
1006	<	}
1007	<	});
1008	<
1009	<	Thread t2 = new Thread(new Runnable() {
1010	<	public void run() {
1011	<	try {
1012	<	lock.lock();
1013	<	c.await();
1014	<	lock.unlock();
1015	<	}
1016	<	catch(InterruptedException e) {
1017	<	threadFail("unexpected exception");
1018	<	}
1019	<	}
1020	<	});
996	>	final CountDownLatch locked1 = new CountDownLatch(1);
997	>	final CountDownLatch locked2 = new CountDownLatch(1);
998	>	Thread t1 = newStartedThread(new CheckedRunnable() {
999	>	public void realRun() throws InterruptedException {
1000	>	lock.lock();
1001	>	locked1.countDown();
1002	>	c.await();
1003	>	lock.unlock();
1004	>	}});
1005	>
1006	>	await(locked1);
1007	>
1008	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1009	>	public void realRun() throws InterruptedException {
1010	>	lock.lock();
1011	>	locked2.countDown();
1012	>	c.await();
1013	>	lock.unlock();
1014	>	}});
1015	>
1016	>	await(locked2);
1017	>
1018	>	lock.lock();
1019	>	assertHasWaiters(lock, c, t1, t2);
1020	>	assertFalse(lock.hasQueuedThreads());
1021	>	c.signal();
1022	>	assertHasWaiters(lock, c, t2);
1023	>	assertTrue(lock.hasQueuedThread(t1));
1024	>	assertFalse(lock.hasQueuedThread(t2));
1025	>	c.signal();
1026	>	assertHasNoWaiters(lock, c);
1027	>	assertTrue(lock.hasQueuedThread(t1));
1028	>	assertTrue(lock.hasQueuedThread(t2));
1029	>	lock.unlock();
1030	>	awaitTermination(t1);
1031	>	awaitTermination(t2);
1032	>	}
1033
1034	<	try {
1035	<	t1.start();
1036	<	t2.start();
1037	<	Thread.sleep(SHORT_DELAY_MS);
1038	<	lock.lock();
1039	<	c.signalAll();
1040	<	lock.unlock();
1041	<	t1.join(SHORT_DELAY_MS);
1042	<	t2.join(SHORT_DELAY_MS);
1043	<	assertFalse(t1.isAlive());
1044	<	assertFalse(t2.isAlive());
1045	<	}
1046	<	catch (Exception ex) {
1047	<	fail("unexpected exception");
1048	<	}
1034	>	/**
1035	>	* await after multiple reentrant locking preserves lock count
1036	>	*/
1037	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1038	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1039	>	public void testAwaitLockCount(boolean fair) {
1040	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1041	>	final Condition c = lock.newCondition();
1042	>	final CountDownLatch locked = new CountDownLatch(2);
1043	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1044	>	public void realRun() throws InterruptedException {
1045	>	lock.lock();
1046	>	assertLockedByMoi(lock);
1047	>	assertEquals(1, lock.getHoldCount());
1048	>	locked.countDown();
1049	>	c.await();
1050	>	assertLockedByMoi(lock);
1051	>	assertEquals(1, lock.getHoldCount());
1052	>	lock.unlock();
1053	>	}});
1054	>
1055	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1056	>	public void realRun() throws InterruptedException {
1057	>	lock.lock();
1058	>	lock.lock();
1059	>	assertLockedByMoi(lock);
1060	>	assertEquals(2, lock.getHoldCount());
1061	>	locked.countDown();
1062	>	c.await();
1063	>	assertLockedByMoi(lock);
1064	>	assertEquals(2, lock.getHoldCount());
1065	>	lock.unlock();
1066	>	lock.unlock();
1067	>	}});
1068	>
1069	>	await(locked);
1070	>	lock.lock();
1071	>	assertHasWaiters(lock, c, t1, t2);
1072	>	assertEquals(1, lock.getHoldCount());
1073	>	c.signalAll();
1074	>	assertHasNoWaiters(lock, c);
1075	>	lock.unlock();
1076	>	awaitTermination(t1);
1077	>	awaitTermination(t2);
1078		}
1079
1080	<	public void testSerialization() {
1081	<	ReentrantLock l = new ReentrantLock();
1082	<	l.lock();
1083	<	l.unlock();
1084	<
1085	<	try {
1086	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1087	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1088	<	out.writeObject(l);
1089	<	out.close();
1090	<
1091	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1092	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1093	<	ReentrantLock r = (ReentrantLock) in.readObject();
1094	<	r.lock();
1095	<	r.unlock();
1096	<	} catch(Exception e){
1097	<	e.printStackTrace();
1098	<	fail("unexpected exception");
1099	<	}
1080	>	/**
1081	>	* A serialized lock deserializes as unlocked
1082	>	*/
1083	>	public void testSerialization()      { testSerialization(false); }
1084	>	public void testSerialization_fair() { testSerialization(true); }
1085	>	public void testSerialization(boolean fair) {
1086	>	ReentrantLock lock = new ReentrantLock(fair);
1087	>	lock.lock();
1088	>
1089	>	ReentrantLock clone = serialClone(lock);
1090	>	assertEquals(lock.isFair(), clone.isFair());
1091	>	assertTrue(lock.isLocked());
1092	>	assertFalse(clone.isLocked());
1093	>	assertEquals(1, lock.getHoldCount());
1094	>	assertEquals(0, clone.getHoldCount());
1095	>	clone.lock();
1096	>	clone.lock();
1097	>	assertTrue(clone.isLocked());
1098	>	assertEquals(2, clone.getHoldCount());
1099	>	assertEquals(1, lock.getHoldCount());
1100	>	clone.unlock();
1101	>	clone.unlock();
1102	>	assertTrue(lock.isLocked());
1103	>	assertFalse(clone.isLocked());
1104		}
1105
1106	+	/**
1107	+	* toString indicates current lock state
1108	+	*/
1109	+	public void testToString()      { testToString(false); }
1110	+	public void testToString_fair() { testToString(true); }
1111	+	public void testToString(boolean fair) {
1112	+	ReentrantLock lock = new ReentrantLock(fair);
1113	+	assertTrue(lock.toString().contains("Unlocked"));
1114	+	lock.lock();
1115	+	assertTrue(lock.toString().contains("Locked"));
1116	+	lock.unlock();
1117	+	assertTrue(lock.toString().contains("Unlocked"));
1118	+	}
1119		}

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