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

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.10 by dl, Sat Dec 27 14:16:33 2003 UTC vs.
Revision 1.48 by jsr166, Sat May 21 06:24:33 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		/**
25		* A runnable calling lockInterruptibly
26		*/
27	<	class InterruptibleLockRunnable implements Runnable {
27	>	class InterruptibleLockRunnable extends CheckedRunnable {
28		final ReentrantLock lock;
29		InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
30	<	public void run() {
31	<	try {
30	<	lock.lockInterruptibly();
31	<	} catch(InterruptedException success){}
30	>	public void realRun() throws InterruptedException {
31	>	lock.lockInterruptibly();
32		}
33		}
34
35	–
35		/**
36		* A runnable calling lockInterruptibly that expects to be
37		* interrupted
38		*/
39	<	class InterruptedLockRunnable implements Runnable {
39	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
40		final ReentrantLock lock;
41		InterruptedLockRunnable(ReentrantLock l) { lock = l; }
42	<	public void run() {
43	<	try {
45	<	lock.lockInterruptibly();
46	<	threadShouldThrow();
47	<	} catch(InterruptedException success){}
42	>	public void realRun() throws InterruptedException {
43	>	lock.lockInterruptibly();
44		}
45		}
46
#	Line 53 | Line 49 | public class ReentrantLockTest extends J
49		*/
50		static class PublicReentrantLock extends ReentrantLock {
51		PublicReentrantLock() { super(); }
52	<	public Collection<Thread> getQueuedThreads() {
53	<	return super.getQueuedThreads();
52	>	PublicReentrantLock(boolean fair) { super(fair); }
53	>	public Thread getOwner() {
54	>	return super.getOwner();
55		}
56	<	public ConditionObject newCondition() {
57	<	return new PublicCondition();
56	>	public Collection<Thread> getQueuedThreads() {
57	>	return super.getQueuedThreads();
58		}
59	<
60	<	class PublicCondition extends ReentrantLock.ConditionObject {
64	<	PublicCondition() { }
65	<	public Collection<Thread> getWaitingThreads() {
66	<	return super.getWaitingThreads();
67	<	}
59	>	public Collection<Thread> getWaitingThreads(Condition c) {
60	>	return super.getWaitingThreads(c);
61		}
62	+	}
63
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	<	* Constructor sets given fairness
75	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
76		*/
77	<	public void testConstructor() {
78	<	ReentrantLock rl = new ReentrantLock();
79	<	assertFalse(rl.isFair());
80	<	ReentrantLock r2 = new ReentrantLock(true);
81	<	assertTrue(r2.isFair());
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	<	* locking an unlocked lock succeeds
89	>	* Checks that lock is not locked.
90		*/
91	<	public void testLock() {
92	<	ReentrantLock rl = new ReentrantLock();
93	<	rl.lock();
94	<	assertTrue(rl.isLocked());
95	<	rl.unlock();
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	<	* locking an unlocked fair lock succeeds
99	>	* Checks that lock is locked by the given thread.
100		*/
101	<	public void testFairLock() {
102	<	ReentrantLock rl = new ReentrantLock(true);
103	<	rl.lock();
104	<	assertTrue(rl.isLocked());
105	<	rl.unlock();
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	<	* Unlocking an unlocked lock throws IllegalMonitorStateException
111	>	* Checks that lock is locked by the current thread.
112		*/
113	<	public void testUnlock_IllegalMonitorStateException() {
114	<	ReentrantLock rl = new ReentrantLock();
115	<	try {
108	<	rl.unlock();
109	<	shouldThrow();
113	>	void assertLockedByMoi(PublicReentrantLock lock) {
114	>	assertLockedBy(lock, Thread.currentThread());
115	>	}
116
117	<	} catch(IllegalMonitorStateException success){}
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	<	* trylock on an unlocked lock succeeds
125	>	* Checks that condition c has exactly the given waiter threads.
126		*/
127	<	public void testTryLock() {
128	<	ReentrantLock rl = new ReentrantLock();
129	<	assertTrue(rl.tryLock());
130	<	assertTrue(rl.isLocked());
131	<	rl.unlock();
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	<	* getQueueLength reports number of waiting threads
142	>	* Awaits condition using the specified AwaitMethod.
143		*/
144	<	public void testGetQueueLength() {
145	<	final ReentrantLock lock = new ReentrantLock();
146	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
147	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
148	<	try {
149	<	assertEquals(0, lock.getQueueLength());
150	<	lock.lock();
151	<	t1.start();
152	<	Thread.sleep(SHORT_DELAY_MS);
153	<	assertEquals(1, lock.getQueueLength());
154	<	t2.start();
155	<	Thread.sleep(SHORT_DELAY_MS);
156	<	assertEquals(2, lock.getQueueLength());
157	<	t1.interrupt();
158	<	Thread.sleep(SHORT_DELAY_MS);
159	<	assertEquals(1, lock.getQueueLength());
160	<	lock.unlock();
161	<	Thread.sleep(SHORT_DELAY_MS);
146	<	assertEquals(0, lock.getQueueLength());
147	<	t1.join();
148	<	t2.join();
149	<	} catch(Exception e){
150	<	unexpectedException();
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	<	}
163	>	}
164
165		/**
166	<	* getQueuedThreads includes waiting threads
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 testGetQueuedThreads() {
188	<	final PublicReentrantLock lock = new PublicReentrantLock();
189	<	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
190	<	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
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	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
198	>	*/
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 {
162	–	assertTrue(lock.getQueuedThreads().isEmpty());
163	–	lock.lock();
164	–	assertTrue(lock.getQueuedThreads().isEmpty());
165	–	t1.start();
166	–	Thread.sleep(SHORT_DELAY_MS);
167	–	assertTrue(lock.getQueuedThreads().contains(t1));
168	–	t2.start();
169	–	Thread.sleep(SHORT_DELAY_MS);
170	–	assertTrue(lock.getQueuedThreads().contains(t1));
171	–	assertTrue(lock.getQueuedThreads().contains(t2));
172	–	t1.interrupt();
173	–	Thread.sleep(SHORT_DELAY_MS);
174	–	assertFalse(lock.getQueuedThreads().contains(t1));
175	–	assertTrue(lock.getQueuedThreads().contains(t2));
204		lock.unlock();
205	<	Thread.sleep(SHORT_DELAY_MS);
206	<	assertTrue(lock.getQueuedThreads().isEmpty());
207	<	t1.join();
180	<	t2.join();
181	<	} catch(Exception e){
182	<	unexpectedException();
183	<	}
184	<	}
185	<
205	>	shouldThrow();
206	>	} catch (IllegalMonitorStateException success) {}
207	>	}
208
209		/**
210	<	* timed trylock is interruptible.
210	>	* tryLock on an unlocked lock succeeds
211		*/
212	<	public void testInterruptedException2() {
213	<	final ReentrantLock lock = new ReentrantLock();
214	<	lock.lock();
215	<	Thread t = new Thread(new Runnable() {
216	<	public void run() {
217	<	try {
218	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
219	<	threadShouldThrow();
220	<	} catch(InterruptedException success){}
221	<	}
200	<	});
201	<	try {
202	<	t.start();
203	<	t.interrupt();
204	<	} catch(Exception e){
205	<	unexpectedException();
206	<	}
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	+	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	<	* Trylock on a locked lock fails
251	>	* getQueueLength reports number of waiting threads
252		*/
253	<	public void testTryLockWhenLocked() {
254	<	final ReentrantLock lock = new ReentrantLock();
255	<	lock.lock();
256	<	Thread t = new Thread(new Runnable() {
257	<	public void run() {
258	<	threadAssertFalse(lock.tryLock());
259	<	}
260	<	});
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	>	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	<	t.start();
284	<	t.join();
285	<	lock.unlock();
286	<	} catch(Exception e){
226	<	unexpectedException();
227	<	}
228	<	}
283	>	lock.hasQueuedThread(null);
284	>	shouldThrow();
285	>	} catch (NullPointerException success) {}
286	>	}
287
288		/**
289	<	* Timed trylock on a locked lock times out
289	>	* hasQueuedThread reports whether a thread is queued.
290		*/
291	<	public void testTryLock_Timeout() {
292	<	final ReentrantLock lock = new ReentrantLock();
293	<	lock.lock();
294	<	Thread t = new Thread(new Runnable() {
295	<	public void run() {
296	<	try {
297	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
298	<	} catch (Exception ex) {
299	<	threadUnexpectedException();
300	<	}
301	<	}
302	<	});
303	<	try {
304	<	t.start();
305	<	t.join();
306	<	lock.unlock();
307	<	} catch(Exception e){
308	<	unexpectedException();
309	<	}
310	<	}
311	<
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	<	* getHoldCount returns number of recursive holds
319	>	* getQueuedThreads includes waiting threads
320		*/
321	<	public void testGetHoldCount() {
322	<	ReentrantLock lock = new ReentrantLock();
323	<	for(int i = 1; i <= SIZE; i++) {
324	<	lock.lock();
325	<	assertEquals(i,lock.getHoldCount());
326	<	}
327	<	for(int i = SIZE; i > 0; i--) {
328	<	lock.unlock();
329	<	assertEquals(i-1,lock.getHoldCount());
330	<	}
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	>	* timed tryLock is interruptible.
351	>	*/
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	>	* tryLock on a locked lock fails
370	>	*/
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	<
269	<
404	>
405		/**
406	<	* isLocked is true when locked and false when not
406	>	* getHoldCount returns number of recursive holds
407		*/
408	<	public void testIsLocked() {
409	<	final ReentrantLock lock = new ReentrantLock();
410	<	lock.lock();
411	<	assertTrue(lock.isLocked());
412	<	lock.unlock();
413	<	assertFalse(lock.isLocked());
414	<	Thread t = new Thread(new Runnable() {
415	<	public void run() {
416	<	lock.lock();
417	<	try {
418	<	Thread.sleep(SMALL_DELAY_MS);
284	<	}
285	<	catch(Exception e) {
286	<	threadUnexpectedException();
287	<	}
288	<	lock.unlock();
289	<	}
290	<	});
291	<	try {
292	<	t.start();
293	<	Thread.sleep(SHORT_DELAY_MS);
294	<	assertTrue(lock.isLocked());
295	<	t.join();
296	<	assertFalse(lock.isLocked());
297	<	} catch(Exception e){
298	<	unexpectedException();
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
302	–
422		/**
423	<	* lockInterruptibly is interruptible.
423	>	* isLocked is true when locked and false when not
424		*/
425	<	public void testLockInterruptibly1() {
426	<	final ReentrantLock lock = new ReentrantLock();
427	<	lock.lock();
309	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
425	>	public void testIsLocked()      { testIsLocked(false); }
426	>	public void testIsLocked_fair() { testIsLocked(true); }
427	>	public void testIsLocked(boolean fair) {
428		try {
429	<	t.start();
430	<	t.interrupt();
429	>	final ReentrantLock lock = new ReentrantLock(fair);
430	>	assertFalse(lock.isLocked());
431	>	lock.lock();
432	>	assertTrue(lock.isLocked());
433	>	lock.lock();
434	>	assertTrue(lock.isLocked());
435		lock.unlock();
436	<	t.join();
437	<	} catch(Exception e){
438	<	unexpectedException();
436	>	assertTrue(lock.isLocked());
437	>	lock.unlock();
438	>	assertFalse(lock.isLocked());
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	<	}
457	>	}
458
459		/**
460		* lockInterruptibly succeeds when unlocked, else is interruptible
461		*/
462	<	public void testLockInterruptibly2() {
463	<	final ReentrantLock lock = new ReentrantLock();
464	<	try {
465	<	lock.lockInterruptibly();
327	<	} catch(Exception e) {
328	<	unexpectedException();
329	<	}
330	<	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());
335	<	assertTrue(lock.isHeldByCurrentThread());
336	<	t.join();
337	<	} catch(Exception e){
338	<	unexpectedException();
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		/**
482		* Calling await without holding lock throws IllegalMonitorStateException
483		*/
484	<	public void testAwait_IllegalMonitor() {
485	<	final ReentrantLock lock = new ReentrantLock();
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	<	shouldThrow();
492	<	}
493	<	catch (IllegalMonitorStateException success) {
494	<	}
495	<	catch (Exception ex) {
496	<	unexpectedException();
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		/**
501		* Calling signal without holding lock throws IllegalMonitorStateException
502		*/
503	<	public void testSignal_IllegalMonitor() {
504	<	final ReentrantLock lock = new ReentrantLock();
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		shouldThrow();
511	<	}
369	<	catch (IllegalMonitorStateException success) {
370	<	}
371	<	catch (Exception ex) {
372	<	unexpectedException();
373	<	}
511	>	} catch (IllegalMonitorStateException success) {}
512		}
513
514		/**
515		* awaitNanos without a signal times out
516		*/
517	<	public void testAwaitNanos_Timeout() {
518	<	final ReentrantLock lock = new ReentrantLock();
519	<	final Condition c = lock.newCondition();
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) {
389	<	unexpectedException();
531	>	} catch (InterruptedException e) {
532	>	threadUnexpectedException(e);
533		}
534		}
535
536		/**
537	<	*  timed await without a signal times out
537	>	* timed await without a signal times out
538		*/
539	<	public void testAwait_Timeout() {
540	<	final ReentrantLock lock = new ReentrantLock();
541	<	final Condition c = lock.newCondition();
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) {
405	<	unexpectedException();
551	>	} catch (InterruptedException e) {
552	>	threadUnexpectedException(e);
553		}
554		}
555
556		/**
557		* awaitUntil without a signal times out
558		*/
559	<	public void testAwaitUntil_Timeout() {
560	<	final ReentrantLock lock = new ReentrantLock();
561	<	final Condition c = lock.newCondition();
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) {
422	<	unexpectedException();
572	>	} catch (InterruptedException e) {
573	>	threadUnexpectedException(e);
574		}
575		}
576
577		/**
578		* await returns when signalled
579		*/
580	<	public void testAwait() {
581	<	final ReentrantLock lock = new ReentrantLock();
582	<	final ReentrantLock.ConditionObject c = lock.newCondition();
583	<	Thread t = new Thread(new Runnable() {
584	<	public void run() {
585	<	try {
586	<	lock.lock();
587	<	c.await();
588	<	lock.unlock();
589	<	}
590	<	catch(InterruptedException e) {
591	<	threadUnexpectedException();
592	<	}
593	<	}
594	<	});
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	+	/**
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	<	t.start();
613	<	Thread.sleep(SHORT_DELAY_MS);
614	<	lock.lock();
449	<	c.signal();
450	<	lock.unlock();
451	<	t.join(SHORT_DELAY_MS);
452	<	assertFalse(t.isAlive());
453	<	}
454	<	catch (Exception ex) {
455	<	unexpectedException();
456	<	}
612	>	lock.hasWaiters(null);
613	>	shouldThrow();
614	>	} catch (NullPointerException success) {}
615		}
616
617		/**
618	<	* hasWaiters returns true when a thread is waiting, else false
618	>	* getWaitQueueLength throws NPE if null
619		*/
620	<	public void testHasWaiters() {
621	<	final ReentrantLock lock = new ReentrantLock();
622	<	final ReentrantLock.ConditionObject c = lock.newCondition();
623	<	Thread t = new Thread(new Runnable() {
624	<	public void run() {
625	<	try {
626	<	lock.lock();
627	<	threadAssertFalse(c.hasWaiters());
628	<	threadAssertEquals(0, c.getWaitQueueLength());
471	<	c.await();
472	<	lock.unlock();
473	<	}
474	<	catch(InterruptedException e) {
475	<	threadUnexpectedException();
476	<	}
477	<	}
478	<	});
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	+	/**
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	<	t.start();
639	<	Thread.sleep(SHORT_DELAY_MS);
640	<	lock.lock();
484	<	assertTrue(c.hasWaiters());
485	<	assertEquals(1, c.getWaitQueueLength());
486	<	c.signal();
487	<	lock.unlock();
488	<	Thread.sleep(SHORT_DELAY_MS);
489	<	lock.lock();
490	<	assertFalse(c.hasWaiters());
491	<	assertEquals(0, c.getWaitQueueLength());
492	<	lock.unlock();
493	<	t.join(SHORT_DELAY_MS);
494	<	assertFalse(t.isAlive());
495	<	}
496	<	catch (Exception ex) {
497	<	unexpectedException();
498	<	}
638	>	lock.getWaitingThreads(null);
639	>	shouldThrow();
640	>	} catch (NullPointerException success) {}
641		}
642
643		/**
644	<	* getWaitQueueLength returns number of waiting threads
644	>	* hasWaiters throws IllegalArgumentException if not owned
645		*/
646	<	public void testGetWaitQueueLength() {
647	<	final ReentrantLock lock = new ReentrantLock();
648	<	final ReentrantLock.ConditionObject c = lock.newCondition();
649	<	Thread t1 = new Thread(new Runnable() {
650	<	public void run() {
651	<	try {
652	<	lock.lock();
653	<	threadAssertFalse(c.hasWaiters());
654	<	threadAssertEquals(0, c.getWaitQueueLength());
655	<	c.await();
656	<	lock.unlock();
515	<	}
516	<	catch(InterruptedException e) {
517	<	threadUnexpectedException();
518	<	}
519	<	}
520	<	});
521	<
522	<	Thread t2 = new Thread(new Runnable() {
523	<	public void run() {
524	<	try {
525	<	lock.lock();
526	<	threadAssertTrue(c.hasWaiters());
527	<	threadAssertEquals(1, c.getWaitQueueLength());
528	<	c.await();
529	<	lock.unlock();
530	<	}
531	<	catch(InterruptedException e) {
532	<	threadUnexpectedException();
533	<	}
534	<	}
535	<	});
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();
541	<	Thread.sleep(SHORT_DELAY_MS);
542	<	lock.lock();
543	<	assertTrue(c.hasWaiters());
544	<	assertEquals(2, c.getWaitQueueLength());
545	<	c.signalAll();
546	<	lock.unlock();
547	<	Thread.sleep(SHORT_DELAY_MS);
548	<	lock.lock();
549	<	assertFalse(c.hasWaiters());
550	<	assertEquals(0, c.getWaitQueueLength());
551	<	lock.unlock();
552	<	t1.join(SHORT_DELAY_MS);
553	<	t2.join(SHORT_DELAY_MS);
554	<	assertFalse(t1.isAlive());
555	<	assertFalse(t2.isAlive());
556	<	}
557	<	catch (Exception ex) {
558	<	unexpectedException();
559	<	}
667	>	lock.hasWaiters(c);
668	>	shouldThrow();
669	>	} catch (IllegalMonitorStateException success) {}
670		}
671
672		/**
673	<	* getWaitingThreads returns only and all waiting threads
673	>	* getWaitQueueLength throws IllegalArgumentException if not owned
674		*/
675	<	public void testGetWaitingThreads() {
676	<	final PublicReentrantLock lock = new PublicReentrantLock();
677	<	final PublicReentrantLock.PublicCondition c = (PublicReentrantLock.PublicCondition)lock.newCondition();
678	<	Thread t1 = new Thread(new Runnable() {
679	<	public void run() {
680	<	try {
681	<	lock.lock();
682	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
683	<	c.await();
684	<	lock.unlock();
685	<	}
576	<	catch(InterruptedException e) {
577	<	threadUnexpectedException();
578	<	}
579	<	}
580	<	});
581	<
582	<	Thread t2 = new Thread(new Runnable() {
583	<	public void run() {
584	<	try {
585	<	lock.lock();
586	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
587	<	c.await();
588	<	lock.unlock();
589	<	}
590	<	catch(InterruptedException e) {
591	<	threadUnexpectedException();
592	<	}
593	<	}
594	<	});
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();
600	<	t1.start();
601	<	Thread.sleep(SHORT_DELAY_MS);
602	<	t2.start();
603	<	Thread.sleep(SHORT_DELAY_MS);
604	<	lock.lock();
605	<	assertTrue(c.hasWaiters());
606	<	assertTrue(c.getWaitingThreads().contains(t1));
607	<	assertTrue(c.getWaitingThreads().contains(t2));
608	<	c.signalAll();
609	<	lock.unlock();
610	<	Thread.sleep(SHORT_DELAY_MS);
611	<	lock.lock();
612	<	assertFalse(c.hasWaiters());
613	<	assertTrue(c.getWaitingThreads().isEmpty());
614	<	lock.unlock();
615	<	t1.join(SHORT_DELAY_MS);
616	<	t2.join(SHORT_DELAY_MS);
617	<	assertFalse(t1.isAlive());
618	<	assertFalse(t2.isAlive());
619	<	}
620	<	catch (Exception ex) {
621	<	unexpectedException();
622	<	}
696	>	lock.getWaitQueueLength(c);
697	>	shouldThrow();
698	>	} catch (IllegalMonitorStateException success) {}
699		}
700
701		/**
702	<	* awaitUninterruptibly doesn't abort on interrupt
702	>	* getWaitingThreads throws IllegalArgumentException if not owned
703		*/
704	<	public void testAwaitUninterruptibly() {
705	<	final ReentrantLock lock = new ReentrantLock();
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	<	}
637	<	});
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();
643	<	lock.lock();
644	<	c.signal();
645	<	lock.unlock();
646	<	assert(t.isInterrupted());
647	<	t.join(SHORT_DELAY_MS);
648	<	assertFalse(t.isAlive());
649	<	}
650	<	catch (Exception ex) {
651	<	unexpectedException();
652	<	}
725	>	lock.getWaitingThreads(c);
726	>	shouldThrow();
727	>	} catch (IllegalMonitorStateException success) {}
728		}
729
730		/**
731	<	* await is interruptible
731	>	* hasWaiters returns true when a thread is waiting, else false
732		*/
733	<	public void testAwait_Interrupt() {
734	<	final ReentrantLock lock = new ReentrantLock();
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	<	threadShouldThrow();
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	<	unexpectedException();
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		/**
822	<	* awaitNanos is interruptible
822	>	* getWaitingThreads returns only and all waiting threads
823		*/
824	<	public void testAwaitNanos_Interrupt() {
825	<	final ReentrantLock lock = new ReentrantLock();
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	<	threadShouldThrow();
836	<	}
837	<	catch(InterruptedException success) {
838	<	}
839	<	}
840	<	});
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	<	try {
876	<	t.start();
877	<	Thread.sleep(SHORT_DELAY_MS);
878	<	t.interrupt();
709	<	t.join(SHORT_DELAY_MS);
710	<	assertFalse(t.isAlive());
711	<	}
712	<	catch (Exception ex) {
713	<	unexpectedException();
714	<	}
875	>	awaitTermination(t1);
876	>	awaitTermination(t2);
877	>
878	>	assertHasNoWaiters(lock, c);
879		}
880
881		/**
882	<	* awaitUntil is interruptible
882	>	* awaitUninterruptibly doesn't abort on interrupt
883		*/
884	<	public void testAwaitUntil_Interrupt() {
885	<	final ReentrantLock lock = new ReentrantLock();
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	<	Thread t = new Thread(new Runnable() {
890	<	public void run() {
891	<	try {
892	<	lock.lock();
893	<	java.util.Date d = new java.util.Date();
894	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
895	<	lock.unlock();
896	<	threadShouldThrow();
897	<	}
898	<	catch(InterruptedException success) {
899	<	}
900	<	}
901	<	});
902	<
903	<	try {
904	<	t.start();
905	<	Thread.sleep(SHORT_DELAY_MS);
906	<	t.interrupt();
907	<	t.join(SHORT_DELAY_MS);
908	<	assertFalse(t.isAlive());
909	<	}
910	<	catch (Exception ex) {
911	<	unexpectedException();
912	<	}
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	>	/**
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() {
954	<	final ReentrantLock lock = new ReentrantLock();
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	<	Thread t1 = new Thread(new Runnable() {
965	<	public void run() {
966	<	try {
967	<	lock.lock();
968	<	c.await();
969	<	lock.unlock();
970	<	}
971	<	catch(InterruptedException e) {
763	<	threadUnexpectedException();
764	<	}
765	<	}
766	<	});
767	<
768	<	Thread t2 = new Thread(new Runnable() {
769	<	public void run() {
770	<	try {
771	<	lock.lock();
772	<	c.await();
773	<	lock.unlock();
774	<	}
775	<	catch(InterruptedException e) {
776	<	threadUnexpectedException();
777	<	}
778	<	}
779	<	});
780	<
781	<	try {
782	<	t1.start();
783	<	t2.start();
784	<	Thread.sleep(SHORT_DELAY_MS);
785	<	lock.lock();
786	<	c.signalAll();
787	<	lock.unlock();
788	<	t1.join(SHORT_DELAY_MS);
789	<	t2.join(SHORT_DELAY_MS);
790	<	assertFalse(t1.isAlive());
791	<	assertFalse(t2.isAlive());
792	<	}
793	<	catch (Exception ex) {
794	<	unexpectedException();
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	+	/**
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	+	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	+	/**
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		/**
1081		* A serialized lock deserializes as unlocked
1082		*/
1083	<	public void testSerialization() {
1084	<	ReentrantLock l = new ReentrantLock();
1085	<	l.lock();
1086	<	l.unlock();
1087	<
1088	<	try {
1089	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1090	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1091	<	out.writeObject(l);
1092	<	out.close();
1093	<
1094	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1095	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1096	<	ReentrantLock r = (ReentrantLock) in.readObject();
1097	<	r.lock();
1098	<	r.unlock();
1099	<	} catch(Exception e){
1100	<	e.printStackTrace();
1101	<	unexpectedException();
1102	<	}
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	+	String us = lock.toString();
1114	+	assertTrue(us.indexOf("Unlocked") >= 0);
1115	+	lock.lock();
1116	+	String ls = lock.toString();
1117	+	assertTrue(ls.indexOf("Locked") >= 0);
1118	+	}
1119		}

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