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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 1.46 by jsr166, Fri May 13 21:48:59 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 AssertionError("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, 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	>	switch (awaitMethod) {
147	>	case await:
148	>	c.await();
149	>	break;
150	>	case awaitNanos:
151	>	long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
152	>	assertTrue(nanosRemaining > 0);
153	>	break;
154	>	case awaitUntil:
155	>	java.util.Date d = new java.util.Date();
156	>	assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
157	>	break;
158	>	}
159	>	}
160
161	<	} catch(IllegalMonitorStateException success){}
161	>	/**
162	>	* Constructor sets given fairness, and is in unlocked state
163	>	*/
164	>	public void testConstructor() {
165	>	PublicReentrantLock lock;
166	>
167	>	lock = new PublicReentrantLock();
168	>	assertFalse(lock.isFair());
169	>	assertNotLocked(lock);
170	>
171	>	lock = new PublicReentrantLock(true);
172	>	assertTrue(lock.isFair());
173	>	assertNotLocked(lock);
174	>
175	>	lock = new PublicReentrantLock(false);
176	>	assertFalse(lock.isFair());
177	>	assertNotLocked(lock);
178	>	}
179	>
180	>	/**
181	>	* locking an unlocked lock succeeds
182	>	*/
183	>	public void testLock()      { testLock(false); }
184	>	public void testLock_fair() { testLock(true); }
185	>	public void testLock(boolean fair) {
186	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
187	>	lock.lock();
188	>	assertLockedByMoi(lock);
189	>	releaseLock(lock);
190		}
191
192	<	/*
193	<	* lockInterruptibly is interruptible.
192	>	/**
193	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
194		*/
195	<	public void testInterruptedException(){
196	<	final ReentrantLock lock = new ReentrantLock();
197	<	lock.lock();
198	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
195	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
196	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
197	>	public void testUnlock_IMSE(boolean fair) {
198	>	ReentrantLock lock = new ReentrantLock(fair);
199		try {
87	–	t.start();
88	–	t.interrupt();
200		lock.unlock();
201	<	t.join();
202	<	} catch(Exception e){
203	<	fail("unexpected exception");
93	<	}
94	<	}
201	>	shouldThrow();
202	>	} catch (IllegalMonitorStateException success) {}
203	>	}
204
205	<	/*
206	<	* getLockQueueLength reports number of waiting threads
205	>	/**
206	>	* tryLock on an unlocked lock succeeds
207		*/
208	<	public void testgetLockQueueLength(){
209	<	final ReentrantLock lock = new ReentrantLock();
208	>	public void testTryLock()      { testTryLock(false); }
209	>	public void testTryLock_fair() { testTryLock(true); }
210	>	public void testTryLock(boolean fair) {
211	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
212	>	assertTrue(lock.tryLock());
213	>	assertLockedByMoi(lock);
214	>	assertTrue(lock.tryLock());
215	>	assertLockedByMoi(lock);
216	>	lock.unlock();
217	>	releaseLock(lock);
218	>	}
219	>
220	>	/**
221	>	* hasQueuedThreads reports whether there are waiting threads
222	>	*/
223	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
224	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
225	>	public void testHasQueuedThreads(boolean fair) {
226	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
227		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
228		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
229	<	try {
230	<	assertEquals(0, lock.getLockQueueLength());
231	<	lock.lock();
232	<	t1.start();
233	<	Thread.sleep(SHORT_DELAY_MS);
234	<	assertEquals(1, lock.getLockQueueLength());
235	<	t2.start();
236	<	Thread.sleep(SHORT_DELAY_MS);
237	<	assertEquals(2, lock.getLockQueueLength());
238	<	t1.interrupt();
239	<	Thread.sleep(SHORT_DELAY_MS);
240	<	assertEquals(1, lock.getLockQueueLength());
241	<	lock.unlock();
242	<	Thread.sleep(SHORT_DELAY_MS);
243	<	assertEquals(0, lock.getLockQueueLength());
244	<	t1.join();
119	<	t2.join();
120	<	} catch(Exception e){
121	<	fail("unexpected exception");
122	<	}
123	<	}
229	>	assertFalse(lock.hasQueuedThreads());
230	>	lock.lock();
231	>	assertFalse(lock.hasQueuedThreads());
232	>	t1.start();
233	>	waitForQueuedThread(lock, t1);
234	>	assertTrue(lock.hasQueuedThreads());
235	>	t2.start();
236	>	waitForQueuedThread(lock, t2);
237	>	assertTrue(lock.hasQueuedThreads());
238	>	t1.interrupt();
239	>	awaitTermination(t1);
240	>	assertTrue(lock.hasQueuedThreads());
241	>	lock.unlock();
242	>	awaitTermination(t2);
243	>	assertFalse(lock.hasQueuedThreads());
244	>	}
245
246	<	/*
247	<	* getQueuedThreads includes waiting threads
246	>	/**
247	>	* getQueueLength reports number of waiting threads
248		*/
249	<	public void testGetQueuedThreads(){
250	<	final MyReentrantLock lock = new MyReentrantLock();
249	>	public void testGetQueueLength()      { testGetQueueLength(false); }
250	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
251	>	public void testGetQueueLength(boolean fair) {
252	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
253		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
254		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
255	<	try {
256	<	assertTrue(lock.getQueuedThreads().isEmpty());
257	<	lock.lock();
258	<	assertTrue(lock.getQueuedThreads().isEmpty());
259	<	t1.start();
260	<	Thread.sleep(SHORT_DELAY_MS);
261	<	assertTrue(lock.getQueuedThreads().contains(t1));
262	<	t2.start();
263	<	Thread.sleep(SHORT_DELAY_MS);
264	<	assertTrue(lock.getQueuedThreads().contains(t1));
265	<	assertTrue(lock.getQueuedThreads().contains(t2));
266	<	t1.interrupt();
267	<	Thread.sleep(SHORT_DELAY_MS);
268	<	assertFalse(lock.getQueuedThreads().contains(t1));
269	<	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	<	}
255	>	assertEquals(0, lock.getQueueLength());
256	>	lock.lock();
257	>	t1.start();
258	>	waitForQueuedThread(lock, t1);
259	>	assertEquals(1, lock.getQueueLength());
260	>	t2.start();
261	>	waitForQueuedThread(lock, t2);
262	>	assertEquals(2, lock.getQueueLength());
263	>	t1.interrupt();
264	>	awaitTermination(t1);
265	>	assertEquals(1, lock.getQueueLength());
266	>	lock.unlock();
267	>	awaitTermination(t2);
268	>	assertEquals(0, lock.getQueueLength());
269	>	}
270
271	+	/**
272	+	* hasQueuedThread(null) throws NPE
273	+	*/
274	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
275	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
276	+	public void testHasQueuedThreadNPE(boolean fair) {
277	+	final ReentrantLock lock = new ReentrantLock(fair);
278	+	try {
279	+	lock.hasQueuedThread(null);
280	+	shouldThrow();
281	+	} catch (NullPointerException success) {}
282	+	}
283
284	<	/*
285	<	* timed trylock is interruptible.
284	>	/**
285	>	* hasQueuedThread reports whether a thread is queued.
286		*/
287	<	public void testInterruptedException2(){
288	<	final ReentrantLock lock = new ReentrantLock();
289	<	lock.lock();
290	<	Thread t = new Thread(new Runnable() {
291	<	public void run(){
292	<	try{
293	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
294	<	threadFail("should throw");
295	<	} catch(InterruptedException success){}
296	<	}
297	<	});
298	<	try {
299	<	t.start();
300	<	t.interrupt();
301	<	} catch(Exception e){
302	<	fail("unexpected exception");
303	<	}
287	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
288	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
289	>	public void testHasQueuedThread(boolean fair) {
290	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
291	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
292	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
293	>	assertFalse(lock.hasQueuedThread(t1));
294	>	assertFalse(lock.hasQueuedThread(t2));
295	>	lock.lock();
296	>	t1.start();
297	>	waitForQueuedThread(lock, t1);
298	>	assertTrue(lock.hasQueuedThread(t1));
299	>	assertFalse(lock.hasQueuedThread(t2));
300	>	t2.start();
301	>	waitForQueuedThread(lock, t2);
302	>	assertTrue(lock.hasQueuedThread(t1));
303	>	assertTrue(lock.hasQueuedThread(t2));
304	>	t1.interrupt();
305	>	awaitTermination(t1);
306	>	assertFalse(lock.hasQueuedThread(t1));
307	>	assertTrue(lock.hasQueuedThread(t2));
308	>	lock.unlock();
309	>	awaitTermination(t2);
310	>	assertFalse(lock.hasQueuedThread(t1));
311	>	assertFalse(lock.hasQueuedThread(t2));
312		}
313
314	+	/**
315	+	* getQueuedThreads includes waiting threads
316	+	*/
317	+	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
318	+	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
319	+	public void testGetQueuedThreads(boolean fair) {
320	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
321	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
322	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
323	+	assertTrue(lock.getQueuedThreads().isEmpty());
324	+	lock.lock();
325	+	assertTrue(lock.getQueuedThreads().isEmpty());
326	+	t1.start();
327	+	waitForQueuedThread(lock, t1);
328	+	assertEquals(1, lock.getQueuedThreads().size());
329	+	assertTrue(lock.getQueuedThreads().contains(t1));
330	+	t2.start();
331	+	waitForQueuedThread(lock, t2);
332	+	assertEquals(2, lock.getQueuedThreads().size());
333	+	assertTrue(lock.getQueuedThreads().contains(t1));
334	+	assertTrue(lock.getQueuedThreads().contains(t2));
335	+	t1.interrupt();
336	+	awaitTermination(t1);
337	+	assertFalse(lock.getQueuedThreads().contains(t1));
338	+	assertTrue(lock.getQueuedThreads().contains(t2));
339	+	assertEquals(1, lock.getQueuedThreads().size());
340	+	lock.unlock();
341	+	awaitTermination(t2);
342	+	assertTrue(lock.getQueuedThreads().isEmpty());
343	+	}
344
345		/**
346	<	* Trylock on a locked lock fails
346	>	* timed tryLock is interruptible.
347		*/
348	<	public void testTryLockWhenLocked() {
349	<	final ReentrantLock lock = new ReentrantLock();
350	<	lock.lock();
351	<	Thread t = new Thread(new Runnable() {
352	<	public void run(){
353	<	threadAssertFalse(lock.tryLock());
354	<	}
355	<	});
356	<	try {
357	<	t.start();
358	<	t.join();
359	<	lock.unlock();
360	<	} catch(Exception e){
361	<	fail("unexpected exception");
362	<	}
199	<	}
348	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
349	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
350	>	public void testTryLock_Interruptible(boolean fair) {
351	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
352	>	lock.lock();
353	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
354	>	public void realRun() throws InterruptedException {
355	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
356	>	}});
357	>
358	>	waitForQueuedThread(lock, t);
359	>	t.interrupt();
360	>	awaitTermination(t);
361	>	releaseLock(lock);
362	>	}
363
364		/**
365	<	* Timed Trylock on a locked lock times out
365	>	* tryLock on a locked lock fails
366		*/
367	<	public void testTryLock_Timeout(){
368	<	final ReentrantLock lock = new ReentrantLock();
369	<	lock.lock();
370	<	Thread t = new Thread(new Runnable() {
371	<	public void run(){
372	<	try {
373	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
374	<	} catch (Exception ex) {
375	<	threadFail("unexpected exception");
376	<	}
377	<	}
378	<	});
379	<	try {
380	<	t.start();
381	<	t.join();
382	<	lock.unlock();
383	<	} catch(Exception e){
384	<	fail("unexpected exception");
385	<	}
386	<	}
387	<
367	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
368	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
369	>	public void testTryLockWhenLocked(boolean fair) {
370	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
371	>	lock.lock();
372	>	Thread t = newStartedThread(new CheckedRunnable() {
373	>	public void realRun() {
374	>	assertFalse(lock.tryLock());
375	>	}});
376	>
377	>	awaitTermination(t);
378	>	releaseLock(lock);
379	>	}
380	>
381	>	/**
382	>	* Timed tryLock on a locked lock times out
383	>	*/
384	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
385	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
386	>	public void testTryLock_Timeout(boolean fair) {
387	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
388	>	lock.lock();
389	>	Thread t = newStartedThread(new CheckedRunnable() {
390	>	public void realRun() throws InterruptedException {
391	>	long startTime = System.nanoTime();
392	>	long timeoutMillis = 10;
393	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
394	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
395	>	}});
396	>
397	>	awaitTermination(t);
398	>	releaseLock(lock);
399	>	}
400	>
401		/**
402		* getHoldCount returns number of recursive holds
403		*/
404	<	public void testGetHoldCount() {
405	<	ReentrantLock lock = new ReentrantLock();
406	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
407	<	lock.lock();
408	<	assertEquals(i,lock.getHoldCount());
409	<	}
410	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
411	<	lock.unlock();
412	<	assertEquals(i-1,lock.getHoldCount());
413	<	}
404	>	public void testGetHoldCount()      { testGetHoldCount(false); }
405	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
406	>	public void testGetHoldCount(boolean fair) {
407	>	ReentrantLock lock = new ReentrantLock(fair);
408	>	for (int i = 1; i <= SIZE; i++) {
409	>	lock.lock();
410	>	assertEquals(i, lock.getHoldCount());
411	>	}
412	>	for (int i = SIZE; i > 0; i--) {
413	>	lock.unlock();
414	>	assertEquals(i-1, lock.getHoldCount());
415	>	}
416		}
417	<
240	<
417	>
418		/**
419		* isLocked is true when locked and false when not
420		*/
421	<	public void testIsLocked() {
422	<	final ReentrantLock lock = new ReentrantLock();
423	<	lock.lock();
424	<	assertTrue(lock.isLocked());
425	<	lock.unlock();
426	<	assertFalse(lock.isLocked());
427	<	Thread t = new Thread(new Runnable() {
428	<	public void run() {
429	<	lock.lock();
430	<	try {
431	<	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);
421	>	public void testIsLocked()      { testIsLocked(false); }
422	>	public void testIsLocked_fair() { testIsLocked(true); }
423	>	public void testIsLocked(boolean fair) {
424	>	try {
425	>	final ReentrantLock lock = new ReentrantLock(fair);
426	>	assertFalse(lock.isLocked());
427	>	lock.lock();
428	>	assertTrue(lock.isLocked());
429	>	lock.lock();
430	>	assertTrue(lock.isLocked());
431	>	lock.unlock();
432		assertTrue(lock.isLocked());
433	<	t.join();
433	>	lock.unlock();
434	>	assertFalse(lock.isLocked());
435	>	final CyclicBarrier barrier = new CyclicBarrier(2);
436	>	Thread t = newStartedThread(new CheckedRunnable() {
437	>	public void realRun() throws Exception {
438	>	lock.lock();
439	>	assertTrue(lock.isLocked());
440	>	barrier.await();
441	>	barrier.await();
442	>	lock.unlock();
443	>	}});
444	>
445	>	barrier.await();
446	>	assertTrue(lock.isLocked());
447	>	barrier.await();
448	>	awaitTermination(t);
449		assertFalse(lock.isLocked());
450	<	} catch(Exception e){
451	<	fail("unexpected exception");
450	>	} catch (Exception e) {
451	>	threadUnexpectedException(e);
452		}
453		}
454
273	–
455		/**
456		* lockInterruptibly succeeds when unlocked, else is interruptible
457		*/
458	<	public void testLockInterruptibly() {
459	<	final ReentrantLock lock = new ReentrantLock();
460	<	try {
461	<	lock.lockInterruptibly();
281	<	} catch(Exception e) {
282	<	fail("unexpected exception");
283	<	}
284	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
458	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
459	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
460	>	public void testLockInterruptibly(boolean fair) {
461	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
462		try {
463	<	t.start();
464	<	t.interrupt();
465	<	assertTrue(lock.isLocked());
289	<	assertTrue(lock.isHeldByCurrentThread());
290	<	t.join();
291	<	} catch(Exception e){
292	<	fail("unexpected exception");
463	>	lock.lockInterruptibly();
464	>	} catch (InterruptedException ie) {
465	>	threadUnexpectedException(ie);
466		}
467	+	assertLockedByMoi(lock);
468	+	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
469	+	waitForQueuedThread(lock, t);
470	+	t.interrupt();
471	+	assertTrue(lock.isLocked());
472	+	assertTrue(lock.isHeldByCurrentThread());
473	+	awaitTermination(t);
474	+	releaseLock(lock);
475		}
476
477	<	public void testAwait_IllegalMonitor() {
478	<	final ReentrantLock lock = new ReentrantLock();
477	>	/**
478	>	* Calling await without holding lock throws IllegalMonitorStateException
479	>	*/
480	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
481	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
482	>	public void testAwait_IMSE(boolean fair) {
483	>	final ReentrantLock lock = new ReentrantLock(fair);
484		final Condition c = lock.newCondition();
485	+	long startTime = System.nanoTime();
486		try {
487	<	c.await();
488	<	fail("should throw");
489	<	}
490	<	catch (IllegalMonitorStateException success) {
491	<	}
492	<	catch (Exception ex) {
493	<	fail("should throw IMSE");
487	>	try {
488	>	c.await();
489	>	shouldThrow();
490	>	} catch (IllegalMonitorStateException success) {}
491	>	try {
492	>	c.await(LONG_DELAY_MS, MILLISECONDS);
493	>	shouldThrow();
494	>	} catch (IllegalMonitorStateException success) {}
495	>	try {
496	>	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
497	>	shouldThrow();
498	>	} catch (IllegalMonitorStateException success) {}
499	>	try {
500	>	c.awaitUninterruptibly();
501	>	shouldThrow();
502	>	} catch (IllegalMonitorStateException success) {}
503	>	} catch (InterruptedException ie) {
504	>	threadUnexpectedException(ie);
505		}
506	+	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
507		}
508
509	<	public void testSignal_IllegalMonitor() {
510	<	final ReentrantLock lock = new ReentrantLock();
509	>	/**
510	>	* Calling signal without holding lock throws IllegalMonitorStateException
511	>	*/
512	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
513	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
514	>	public void testSignal_IMSE(boolean fair) {
515	>	final ReentrantLock lock = new ReentrantLock(fair);
516		final Condition c = lock.newCondition();
517		try {
518		c.signal();
519	<	fail("should throw");
520	<	}
317	<	catch (IllegalMonitorStateException success) {
318	<	}
319	<	catch (Exception ex) {
320	<	fail("should throw IMSE");
321	<	}
519	>	shouldThrow();
520	>	} catch (IllegalMonitorStateException success) {}
521		}
522
523	<	public void testAwaitNanos_Timeout() {
524	<	final ReentrantLock lock = new ReentrantLock();
525	<	final Condition c = lock.newCondition();
523	>	/**
524	>	* awaitNanos without a signal times out
525	>	*/
526	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
527	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
528	>	public void testAwaitNanos_Timeout(boolean fair) {
529		try {
530	+	final ReentrantLock lock = new ReentrantLock(fair);
531	+	final Condition c = lock.newCondition();
532		lock.lock();
533	<	long t = c.awaitNanos(100);
534	<	assertTrue(t <= 0);
533	>	long startTime = System.nanoTime();
534	>	long timeoutMillis = 10;
535	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
536	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
537	>	assertTrue(nanosRemaining <= 0);
538	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
539		lock.unlock();
540	<	}
541	<	catch (Exception ex) {
334	<	fail("unexpected exception");
540	>	} catch (InterruptedException e) {
541	>	threadUnexpectedException(e);
542		}
543		}
544
545	<	public void testAwait_Timeout() {
546	<	final ReentrantLock lock = new ReentrantLock();
547	<	final Condition c = lock.newCondition();
545	>	/**
546	>	* timed await without a signal times out
547	>	*/
548	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
549	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
550	>	public void testAwait_Timeout(boolean fair) {
551		try {
552	+	final ReentrantLock lock = new ReentrantLock(fair);
553	+	final Condition c = lock.newCondition();
554		lock.lock();
555	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
555	>	long startTime = System.nanoTime();
556	>	long timeoutMillis = 10;
557	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
558	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
559		lock.unlock();
560	<	}
561	<	catch (Exception ex) {
347	<	fail("unexpected exception");
560	>	} catch (InterruptedException e) {
561	>	threadUnexpectedException(e);
562		}
563		}
564
565	<	public void testAwaitUntil_Timeout() {
566	<	final ReentrantLock lock = new ReentrantLock();
567	<	final Condition c = lock.newCondition();
565	>	/**
566	>	* awaitUntil without a signal times out
567	>	*/
568	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
569	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
570	>	public void testAwaitUntil_Timeout(boolean fair) {
571		try {
572	+	final ReentrantLock lock = new ReentrantLock(fair);
573	+	final Condition c = lock.newCondition();
574		lock.lock();
575	+	long startTime = System.nanoTime();
576	+	long timeoutMillis = 10;
577		java.util.Date d = new java.util.Date();
578	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
578	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
579	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
580		lock.unlock();
581	<	}
582	<	catch (Exception ex) {
361	<	fail("unexpected exception");
581	>	} catch (InterruptedException e) {
582	>	threadUnexpectedException(e);
583		}
584		}
585
586	<	public void testAwait() {
587	<	final ReentrantLock lock = new ReentrantLock();
588	<	final ReentrantLock.ConditionObject c = lock.newCondition();
589	<	Thread t = new Thread(new Runnable() {
590	<	public void run() {
591	<	try {
592	<	lock.lock();
593	<	c.await();
594	<	lock.unlock();
595	<	}
596	<	catch(InterruptedException e) {
597	<	threadFail("unexpected exception");
598	<	}
599	<	}
600	<	});
586	>	/**
587	>	* await returns when signalled
588	>	*/
589	>	public void testAwait()      { testAwait(false); }
590	>	public void testAwait_fair() { testAwait(true); }
591	>	public void testAwait(boolean fair) {
592	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
593	>	final Condition c = lock.newCondition();
594	>	final CountDownLatch locked = new CountDownLatch(1);
595	>	Thread t = newStartedThread(new CheckedRunnable() {
596	>	public void realRun() throws InterruptedException {
597	>	lock.lock();
598	>	locked.countDown();
599	>	c.await();
600	>	lock.unlock();
601	>	}});
602	>
603	>	await(locked);
604	>	lock.lock();
605	>	assertHasWaiters(lock, c, t);
606	>	c.signal();
607	>	assertHasNoWaiters(lock, c);
608	>	assertTrue(t.isAlive());
609	>	lock.unlock();
610	>	awaitTermination(t);
611	>	}
612
613	<	try {
614	<	t.start();
615	<	Thread.sleep(SHORT_DELAY_MS);
616	<	lock.lock();
617	<	c.signal();
618	<	lock.unlock();
619	<	t.join(SHORT_DELAY_MS);
620	<	assertFalse(t.isAlive());
621	<	}
622	<	catch (Exception ex) {
623	<	fail("unexpected exception");
392	<	}
613	>	/**
614	>	* hasWaiters throws NPE if null
615	>	*/
616	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
617	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
618	>	public void testHasWaitersNPE(boolean fair) {
619	>	final ReentrantLock lock = new ReentrantLock(fair);
620	>	try {
621	>	lock.hasWaiters(null);
622	>	shouldThrow();
623	>	} catch (NullPointerException success) {}
624		}
625
626	<	public void testHasWaiters() {
627	<	final ReentrantLock lock = new ReentrantLock();
628	<	final ReentrantLock.ConditionObject c = lock.newCondition();
629	<	Thread t = new Thread(new Runnable() {
630	<	public void run() {
631	<	try {
632	<	lock.lock();
633	<	threadAssertFalse(c.hasWaiters());
634	<	threadAssertEquals(0, c.getWaitQueueLength());
635	<	c.await();
636	<	lock.unlock();
637	<	}
407	<	catch(InterruptedException e) {
408	<	threadFail("unexpected exception");
409	<	}
410	<	}
411	<	});
626	>	/**
627	>	* getWaitQueueLength throws NPE if null
628	>	*/
629	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
630	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
631	>	public void testGetWaitQueueLengthNPE(boolean fair) {
632	>	final ReentrantLock lock = new ReentrantLock(fair);
633	>	try {
634	>	lock.getWaitQueueLength(null);
635	>	shouldThrow();
636	>	} catch (NullPointerException success) {}
637	>	}
638
639	<	try {
640	<	t.start();
641	<	Thread.sleep(SHORT_DELAY_MS);
642	<	lock.lock();
643	<	assertTrue(c.hasWaiters());
644	<	assertEquals(1, c.getWaitQueueLength());
645	<	c.signal();
646	<	lock.unlock();
647	<	Thread.sleep(SHORT_DELAY_MS);
648	<	lock.lock();
649	<	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	<	}
639	>	/**
640	>	* getWaitingThreads throws NPE if null
641	>	*/
642	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
643	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
644	>	public void testGetWaitingThreadsNPE(boolean fair) {
645	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
646	>	try {
647	>	lock.getWaitingThreads(null);
648	>	shouldThrow();
649	>	} catch (NullPointerException success) {}
650		}
651
652	<	public void testGetWaitQueueLength() {
653	<	final ReentrantLock lock = new ReentrantLock();
654	<	final ReentrantLock.ConditionObject c = lock.newCondition();
655	<	Thread t1 = new Thread(new Runnable() {
656	<	public void run() {
657	<	try {
658	<	lock.lock();
659	<	threadAssertFalse(c.hasWaiters());
660	<	threadAssertEquals(0, c.getWaitQueueLength());
661	<	c.await();
662	<	lock.unlock();
663	<	}
664	<	catch(InterruptedException e) {
665	<	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	<	});
652	>	/**
653	>	* hasWaiters throws IllegalArgumentException if not owned
654	>	*/
655	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
656	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
657	>	public void testHasWaitersIAE(boolean fair) {
658	>	final ReentrantLock lock = new ReentrantLock(fair);
659	>	final Condition c = lock.newCondition();
660	>	final ReentrantLock lock2 = new ReentrantLock(fair);
661	>	try {
662	>	lock2.hasWaiters(c);
663	>	shouldThrow();
664	>	} catch (IllegalArgumentException success) {}
665	>	}
666
667	+	/**
668	+	* hasWaiters throws IllegalMonitorStateException if not locked
669	+	*/
670	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
671	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
672	+	public void testHasWaitersIMSE(boolean fair) {
673	+	final ReentrantLock lock = new ReentrantLock(fair);
674	+	final Condition c = lock.newCondition();
675		try {
676	<	t1.start();
677	<	Thread.sleep(SHORT_DELAY_MS);
678	<	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	<	}
676	>	lock.hasWaiters(c);
677	>	shouldThrow();
678	>	} catch (IllegalMonitorStateException success) {}
679		}
680
681	<	public void testGetWaitingThreads() {
682	<	final MyReentrantLock lock = new MyReentrantLock();
683	<	final MyReentrantLock.MyCondition c = (MyReentrantLock.MyCondition)lock.newCondition();
684	<	Thread t1 = new Thread(new Runnable() {
685	<	public void run() {
686	<	try {
687	<	lock.lock();
688	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
689	<	c.await();
690	<	lock.unlock();
691	<	}
692	<	catch(InterruptedException e) {
693	<	threadFail("unexpected exception");
694	<	}
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	<	});
681	>	/**
682	>	* getWaitQueueLength throws IllegalArgumentException if not owned
683	>	*/
684	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
685	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
686	>	public void testGetWaitQueueLengthIAE(boolean fair) {
687	>	final ReentrantLock lock = new ReentrantLock(fair);
688	>	final Condition c = lock.newCondition();
689	>	final ReentrantLock lock2 = new ReentrantLock(fair);
690	>	try {
691	>	lock2.getWaitQueueLength(c);
692	>	shouldThrow();
693	>	} catch (IllegalArgumentException success) {}
694	>	}
695
696	+	/**
697	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
698	+	*/
699	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
700	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
701	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
702	+	final ReentrantLock lock = new ReentrantLock(fair);
703	+	final Condition c = lock.newCondition();
704		try {
705	<	lock.lock();
706	<	assertTrue(c.getWaitingThreads().isEmpty());
707	<	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	<	}
705	>	lock.getWaitQueueLength(c);
706	>	shouldThrow();
707	>	} catch (IllegalMonitorStateException success) {}
708		}
709
710	<	public void testAwaitUninterruptibly() {
711	<	final ReentrantLock lock = new ReentrantLock();
710	>	/**
711	>	* getWaitingThreads throws IllegalArgumentException if not owned
712	>	*/
713	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
714	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
715	>	public void testGetWaitingThreadsIAE(boolean fair) {
716	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
717		final Condition c = lock.newCondition();
718	<	Thread t = new Thread(new Runnable() {
719	<	public void run() {
720	<	lock.lock();
721	<	c.awaitUninterruptibly();
722	<	lock.unlock();
723	<	}
561	<	});
718	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
719	>	try {
720	>	lock2.getWaitingThreads(c);
721	>	shouldThrow();
722	>	} catch (IllegalArgumentException success) {}
723	>	}
724
725	+	/**
726	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
727	+	*/
728	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
729	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
730	+	public void testGetWaitingThreadsIMSE(boolean fair) {
731	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
732	+	final Condition c = lock.newCondition();
733		try {
734	<	t.start();
735	<	Thread.sleep(SHORT_DELAY_MS);
736	<	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	<	}
734	>	lock.getWaitingThreads(c);
735	>	shouldThrow();
736	>	} catch (IllegalMonitorStateException success) {}
737		}
738
739	<	public void testAwait_Interrupt() {
740	<	final ReentrantLock lock = new ReentrantLock();
739	>	/**
740	>	* hasWaiters returns true when a thread is waiting, else false
741	>	*/
742	>	public void testHasWaiters()      { testHasWaiters(false); }
743	>	public void testHasWaiters_fair() { testHasWaiters(true); }
744	>	public void testHasWaiters(boolean fair) {
745	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
746		final Condition c = lock.newCondition();
747	<	Thread t = new Thread(new Runnable() {
748	<	public void run() {
749	<	try {
750	<	lock.lock();
751	<	c.await();
752	<	lock.unlock();
753	<	threadFail("should throw");
754	<	}
755	<	catch(InterruptedException success) {
756	<	}
757	<	}
758	<	});
747	>	final CountDownLatch locked = new CountDownLatch(1);
748	>	Thread t = newStartedThread(new CheckedRunnable() {
749	>	public void realRun() throws InterruptedException {
750	>	lock.lock();
751	>	assertHasNoWaiters(lock, c);
752	>	assertFalse(lock.hasWaiters(c));
753	>	locked.countDown();
754	>	c.await();
755	>	assertHasNoWaiters(lock, c);
756	>	assertFalse(lock.hasWaiters(c));
757	>	lock.unlock();
758	>	}});
759	>
760	>	await(locked);
761	>	lock.lock();
762	>	assertHasWaiters(lock, c, t);
763	>	assertTrue(lock.hasWaiters(c));
764	>	c.signal();
765	>	assertHasNoWaiters(lock, c);
766	>	assertFalse(lock.hasWaiters(c));
767	>	lock.unlock();
768	>	awaitTermination(t);
769	>	assertHasNoWaiters(lock, c);
770	>	}
771
772	<	try {
773	<	t.start();
774	<	Thread.sleep(SHORT_DELAY_MS);
775	<	t.interrupt();
776	<	t.join(SHORT_DELAY_MS);
777	<	assertFalse(t.isAlive());
778	<	}
779	<	catch (Exception ex) {
780	<	fail("unexpected exception");
781	<	}
772	>	/**
773	>	* getWaitQueueLength returns number of waiting threads
774	>	*/
775	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
776	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
777	>	public void testGetWaitQueueLength(boolean fair) {
778	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
779	>	final Condition c = lock.newCondition();
780	>	final CountDownLatch locked1 = new CountDownLatch(1);
781	>	final CountDownLatch locked2 = new CountDownLatch(1);
782	>	Thread t1 = new Thread(new CheckedRunnable() {
783	>	public void realRun() throws InterruptedException {
784	>	lock.lock();
785	>	assertFalse(lock.hasWaiters(c));
786	>	assertEquals(0, lock.getWaitQueueLength(c));
787	>	locked1.countDown();
788	>	c.await();
789	>	lock.unlock();
790	>	}});
791	>
792	>	Thread t2 = new Thread(new CheckedRunnable() {
793	>	public void realRun() throws InterruptedException {
794	>	lock.lock();
795	>	assertTrue(lock.hasWaiters(c));
796	>	assertEquals(1, lock.getWaitQueueLength(c));
797	>	locked2.countDown();
798	>	c.await();
799	>	lock.unlock();
800	>	}});
801	>
802	>	lock.lock();
803	>	assertEquals(0, lock.getWaitQueueLength(c));
804	>	lock.unlock();
805	>
806	>	t1.start();
807	>	await(locked1);
808	>
809	>	lock.lock();
810	>	assertHasWaiters(lock, c, t1);
811	>	assertEquals(1, lock.getWaitQueueLength(c));
812	>	lock.unlock();
813	>
814	>	t2.start();
815	>	await(locked2);
816	>
817	>	lock.lock();
818	>	assertHasWaiters(lock, c, t1, t2);
819	>	assertEquals(2, lock.getWaitQueueLength(c));
820	>	c.signalAll();
821	>	assertHasNoWaiters(lock, c);
822	>	lock.unlock();
823	>
824	>	awaitTermination(t1);
825	>	awaitTermination(t2);
826	>
827	>	assertHasNoWaiters(lock, c);
828		}
829
830	<	public void testAwaitNanos_Interrupt() {
831	<	final ReentrantLock lock = new ReentrantLock();
830	>	/**
831	>	* getWaitingThreads returns only and all waiting threads
832	>	*/
833	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
834	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
835	>	public void testGetWaitingThreads(boolean fair) {
836	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
837		final Condition c = lock.newCondition();
838	<	Thread t = new Thread(new Runnable() {
839	<	public void run() {
840	<	try {
841	<	lock.lock();
842	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
843	<	lock.unlock();
844	<	threadFail("should throw");
845	<	}
846	<	catch(InterruptedException success) {
847	<	}
848	<	}
849	<	});
850	<
851	<	try {
852	<	t.start();
853	<	Thread.sleep(SHORT_DELAY_MS);
854	<	t.interrupt();
855	<	t.join(SHORT_DELAY_MS);
856	<	assertFalse(t.isAlive());
857	<	}
858	<	catch (Exception ex) {
859	<	fail("unexpected exception");
860	<	}
838	>	final CountDownLatch locked1 = new CountDownLatch(1);
839	>	final CountDownLatch locked2 = new CountDownLatch(1);
840	>	Thread t1 = new Thread(new CheckedRunnable() {
841	>	public void realRun() throws InterruptedException {
842	>	lock.lock();
843	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
844	>	locked1.countDown();
845	>	c.await();
846	>	lock.unlock();
847	>	}});
848	>
849	>	Thread t2 = new Thread(new CheckedRunnable() {
850	>	public void realRun() throws InterruptedException {
851	>	lock.lock();
852	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
853	>	locked2.countDown();
854	>	c.await();
855	>	lock.unlock();
856	>	}});
857	>
858	>	lock.lock();
859	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
860	>	lock.unlock();
861	>
862	>	t1.start();
863	>	await(locked1);
864	>
865	>	lock.lock();
866	>	assertHasWaiters(lock, c, t1);
867	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
868	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
869	>	assertEquals(1, lock.getWaitingThreads(c).size());
870	>	lock.unlock();
871	>
872	>	t2.start();
873	>	await(locked2);
874	>
875	>	lock.lock();
876	>	assertHasWaiters(lock, c, t1, t2);
877	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
878	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
879	>	assertEquals(2, lock.getWaitingThreads(c).size());
880	>	c.signalAll();
881	>	assertHasNoWaiters(lock, c);
882	>	lock.unlock();
883	>
884	>	awaitTermination(t1);
885	>	awaitTermination(t2);
886	>
887	>	assertHasNoWaiters(lock, c);
888		}
889
890	<	public void testAwaitUntil_Interrupt() {
891	<	final ReentrantLock lock = new ReentrantLock();
892	<	final Condition c = lock.newCondition();
893	<	Thread t = new Thread(new Runnable() {
894	<	public void run() {
895	<	try {
896	<	lock.lock();
897	<	java.util.Date d = new java.util.Date();
898	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
899	<	lock.unlock();
900	<	threadFail("should throw");
901	<	}
902	<	catch(InterruptedException success) {
903	<	}
904	<	}
905	<	});
890	>	/**
891	>	* awaitUninterruptibly doesn't abort on interrupt
892	>	*/
893	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
894	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
895	>	public void testAwaitUninterruptibly(boolean fair) {
896	>	final ReentrantLock lock = new ReentrantLock(fair);
897	>	final Condition c = lock.newCondition();
898	>	final CountDownLatch locked = new CountDownLatch(1);
899	>	Thread t = newStartedThread(new CheckedRunnable() {
900	>	public void realRun() {
901	>	lock.lock();
902	>	locked.countDown();
903	>	c.awaitUninterruptibly();
904	>	assertTrue(Thread.interrupted());
905	>	lock.unlock();
906	>	}});
907	>
908	>	await(locked);
909	>	lock.lock();
910	>	lock.unlock();
911	>	t.interrupt();
912	>	long timeoutMillis = 10;
913	>	assertThreadStaysAlive(t, timeoutMillis);
914	>	lock.lock();
915	>	c.signal();
916	>	lock.unlock();
917	>	awaitTermination(t);
918	>	}
919
920	<	try {
921	<	t.start();
922	<	Thread.sleep(SHORT_DELAY_MS);
923	<	t.interrupt();
924	<	t.join(SHORT_DELAY_MS);
925	<	assertFalse(t.isAlive());
926	<	}
927	<	catch (Exception ex) {
928	<	fail("unexpected exception");
920	>	/**
921	>	* await/awaitNanos/awaitUntil is interruptible
922	>	*/
923	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
924	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
925	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
926	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
927	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
928	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
929	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
930	>	final PublicReentrantLock lock =
931	>	new PublicReentrantLock(fair);
932	>	final Condition c = lock.newCondition();
933	>	final CountDownLatch locked = new CountDownLatch(1);
934	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
935	>	public void realRun() throws InterruptedException {
936	>	lock.lock();
937	>	assertLockedByMoi(lock);
938	>	assertHasNoWaiters(lock, c);
939	>	locked.countDown();
940	>	try {
941	>	await(c, awaitMethod);
942	>	} finally {
943	>	assertLockedByMoi(lock);
944	>	assertHasNoWaiters(lock, c);
945	>	lock.unlock();
946	>	assertFalse(Thread.interrupted());
947	>	}
948	>	}});
949	>
950	>	await(locked);
951	>	assertHasWaiters(lock, c, t);
952	>	t.interrupt();
953	>	awaitTermination(t);
954	>	assertNotLocked(lock);
955	>	}
956	>
957	>	/**
958	>	* signalAll wakes up all threads
959	>	*/
960	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
961	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
962	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
963	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
964	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
965	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
966	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
967	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
968	>	final Condition c = lock.newCondition();
969	>	final CountDownLatch locked = new CountDownLatch(2);
970	>	class Awaiter extends CheckedRunnable {
971	>	public void realRun() throws InterruptedException {
972	>	lock.lock();
973	>	locked.countDown();
974	>	await(c, awaitMethod);
975	>	lock.unlock();
976	>	}
977		}
978	+
979	+	Thread t1 = newStartedThread(new Awaiter());
980	+	Thread t2 = newStartedThread(new Awaiter());
981	+
982	+	await(locked);
983	+	lock.lock();
984	+	assertHasWaiters(lock, c, t1, t2);
985	+	c.signalAll();
986	+	assertHasNoWaiters(lock, c);
987	+	lock.unlock();
988	+	awaitTermination(t1);
989	+	awaitTermination(t2);
990		}
991
992	<	public void testSignalAll() {
993	<	final ReentrantLock lock = new ReentrantLock();
992	>	/**
993	>	* signal wakes up waiting threads in FIFO order.
994	>	*/
995	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
996	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
997	>	public void testSignalWakesFifo(boolean fair) {
998	>	final PublicReentrantLock lock =
999	>	new PublicReentrantLock(fair);
1000		final Condition c = lock.newCondition();
1001	<	Thread t1 = new Thread(new Runnable() {
1002	<	public void run() {
1003	<	try {
1004	<	lock.lock();
1005	<	c.await();
1006	<	lock.unlock();
1007	<	}
1008	<	catch(InterruptedException e) {
1009	<	threadFail("unexpected exception");
1010	<	}
1011	<	}
1012	<	});
1013	<
1014	<	Thread t2 = new Thread(new Runnable() {
1015	<	public void run() {
1016	<	try {
1017	<	lock.lock();
1018	<	c.await();
1019	<	lock.unlock();
1020	<	}
1021	<	catch(InterruptedException e) {
1022	<	threadFail("unexpected exception");
1023	<	}
1024	<	}
1025	<	});
1001	>	final CountDownLatch locked1 = new CountDownLatch(1);
1002	>	final CountDownLatch locked2 = new CountDownLatch(1);
1003	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1004	>	public void realRun() throws InterruptedException {
1005	>	lock.lock();
1006	>	locked1.countDown();
1007	>	c.await();
1008	>	lock.unlock();
1009	>	}});
1010	>
1011	>	await(locked1);
1012	>
1013	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1014	>	public void realRun() throws InterruptedException {
1015	>	lock.lock();
1016	>	locked2.countDown();
1017	>	c.await();
1018	>	lock.unlock();
1019	>	}});
1020	>
1021	>	await(locked2);
1022	>
1023	>	lock.lock();
1024	>	assertHasWaiters(lock, c, t1, t2);
1025	>	assertFalse(lock.hasQueuedThreads());
1026	>	c.signal();
1027	>	assertHasWaiters(lock, c, t2);
1028	>	assertTrue(lock.hasQueuedThread(t1));
1029	>	assertFalse(lock.hasQueuedThread(t2));
1030	>	c.signal();
1031	>	assertHasNoWaiters(lock, c);
1032	>	assertTrue(lock.hasQueuedThread(t1));
1033	>	assertTrue(lock.hasQueuedThread(t2));
1034	>	lock.unlock();
1035	>	awaitTermination(t1);
1036	>	awaitTermination(t2);
1037	>	}
1038
1039	<	try {
1040	<	t1.start();
1041	<	t2.start();
1042	<	Thread.sleep(SHORT_DELAY_MS);
1043	<	lock.lock();
1044	<	c.signalAll();
1045	<	lock.unlock();
1046	<	t1.join(SHORT_DELAY_MS);
1047	<	t2.join(SHORT_DELAY_MS);
1048	<	assertFalse(t1.isAlive());
1049	<	assertFalse(t2.isAlive());
1050	<	}
1051	<	catch (Exception ex) {
1052	<	fail("unexpected exception");
1053	<	}
1039	>	/**
1040	>	* await after multiple reentrant locking preserves lock count
1041	>	*/
1042	>	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1043	>	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1044	>	public void testAwaitLockCount(boolean fair) {
1045	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1046	>	final Condition c = lock.newCondition();
1047	>	final CountDownLatch locked = new CountDownLatch(2);
1048	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1049	>	public void realRun() throws InterruptedException {
1050	>	lock.lock();
1051	>	assertLockedByMoi(lock);
1052	>	assertEquals(1, lock.getHoldCount());
1053	>	locked.countDown();
1054	>	c.await();
1055	>	assertLockedByMoi(lock);
1056	>	assertEquals(1, lock.getHoldCount());
1057	>	lock.unlock();
1058	>	}});
1059	>
1060	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1061	>	public void realRun() throws InterruptedException {
1062	>	lock.lock();
1063	>	lock.lock();
1064	>	assertLockedByMoi(lock);
1065	>	assertEquals(2, lock.getHoldCount());
1066	>	locked.countDown();
1067	>	c.await();
1068	>	assertLockedByMoi(lock);
1069	>	assertEquals(2, lock.getHoldCount());
1070	>	lock.unlock();
1071	>	lock.unlock();
1072	>	}});
1073	>
1074	>	await(locked);
1075	>	lock.lock();
1076	>	assertHasWaiters(lock, c, t1, t2);
1077	>	assertEquals(1, lock.getHoldCount());
1078	>	c.signalAll();
1079	>	assertHasNoWaiters(lock, c);
1080	>	lock.unlock();
1081	>	awaitTermination(t1);
1082	>	awaitTermination(t2);
1083		}
1084
1085	<	public void testSerialization() {
1086	<	ReentrantLock l = new ReentrantLock();
1087	<	l.lock();
1088	<	l.unlock();
1089	<
1090	<	try {
1091	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1092	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1093	<	out.writeObject(l);
1094	<	out.close();
1095	<
1096	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1097	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1098	<	ReentrantLock r = (ReentrantLock) in.readObject();
1099	<	r.lock();
1100	<	r.unlock();
1101	<	} catch(Exception e){
1102	<	e.printStackTrace();
1103	<	fail("unexpected exception");
1104	<	}
1085	>	/**
1086	>	* A serialized lock deserializes as unlocked
1087	>	*/
1088	>	public void testSerialization()      { testSerialization(false); }
1089	>	public void testSerialization_fair() { testSerialization(true); }
1090	>	public void testSerialization(boolean fair) {
1091	>	ReentrantLock lock = new ReentrantLock(fair);
1092	>	lock.lock();
1093	>
1094	>	ReentrantLock clone = serialClone(lock);
1095	>	assertEquals(lock.isFair(), clone.isFair());
1096	>	assertTrue(lock.isLocked());
1097	>	assertFalse(clone.isLocked());
1098	>	assertEquals(1, lock.getHoldCount());
1099	>	assertEquals(0, clone.getHoldCount());
1100	>	clone.lock();
1101	>	clone.lock();
1102	>	assertTrue(clone.isLocked());
1103	>	assertEquals(2, clone.getHoldCount());
1104	>	assertEquals(1, lock.getHoldCount());
1105	>	clone.unlock();
1106	>	clone.unlock();
1107	>	assertTrue(lock.isLocked());
1108	>	assertFalse(clone.isLocked());
1109		}
1110
1111	+	/**
1112	+	* toString indicates current lock state
1113	+	*/
1114	+	public void testToString()      { testToString(false); }
1115	+	public void testToString_fair() { testToString(true); }
1116	+	public void testToString(boolean fair) {
1117	+	ReentrantLock lock = new ReentrantLock(fair);
1118	+	String us = lock.toString();
1119	+	assertTrue(us.indexOf("Unlocked") >= 0);
1120	+	lock.lock();
1121	+	String ls = lock.toString();
1122	+	assertTrue(ls.indexOf("Locked") >= 0);
1123	+	}
1124		}

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