ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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

Comparing jsr166/src/test/tck/StampedLockTest.java (file contents):
Revision 1.12 by jsr166, Fri Feb 27 21:54:13 2015 UTC vs.
Revision 1.36 by jsr166, Mon May 29 19:15:03 2017 UTC

#	Line 5 | Line 5
5		* http://creativecommons.org/publicdomain/zero/1.0/
6		*/
7
8	+	import static java.util.concurrent.TimeUnit.DAYS;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	+	import static java.util.concurrent.TimeUnit.SECONDS;
11
12	+	import java.util.ArrayList;
13	+	import java.util.List;
14		import java.util.concurrent.CountDownLatch;
15	+	import java.util.concurrent.Future;
16	+	import java.util.concurrent.TimeUnit;
17		import java.util.concurrent.locks.Lock;
18		import java.util.concurrent.locks.StampedLock;
19	+	import java.util.function.BiConsumer;
20	+	import java.util.function.Function;
21
22		import junit.framework.Test;
23		import junit.framework.TestSuite;
24
25		public class StampedLockTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run(suite());
27	>	main(suite(), args);
28		}
29		public static Test suite() {
30		return new TestSuite(StampedLockTest.class);
31		}
32
33		/**
26	–	* A runnable calling writeLockInterruptibly
27	–	*/
28	–	class InterruptibleLockRunnable extends CheckedRunnable {
29	–	final StampedLock lock;
30	–	InterruptibleLockRunnable(StampedLock l) { lock = l; }
31	–	public void realRun() throws InterruptedException {
32	–	lock.writeLockInterruptibly();
33	–	}
34	–	}
35	–
36	–	/**
37	–	* A runnable calling writeLockInterruptibly that expects to be
38	–	* interrupted
39	–	*/
40	–	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41	–	final StampedLock lock;
42	–	InterruptedLockRunnable(StampedLock l) { lock = l; }
43	–	public void realRun() throws InterruptedException {
44	–	lock.writeLockInterruptibly();
45	–	}
46	–	}
47	–
48	–	/**
34		* Releases write lock, checking isWriteLocked before and after
35		*/
36	<	void releaseWriteLock(StampedLock lock, long s) {
36	>	void releaseWriteLock(StampedLock lock, long stamp) {
37		assertTrue(lock.isWriteLocked());
38	<	lock.unlockWrite(s);
38	>	assertValid(lock, stamp);
39	>	lock.unlockWrite(stamp);
40		assertFalse(lock.isWriteLocked());
41	+	assertFalse(lock.validate(stamp));
42		}
43
44		/**
45	<	* Constructed StampedLock is in unlocked state
45	>	* Releases read lock, checking isReadLocked before and after
46		*/
47	<	public void testConstructor() {
48	<	StampedLock lock;
49	<	lock = new StampedLock();
50	<	assertFalse(lock.isWriteLocked());
47	>	void releaseReadLock(StampedLock lock, long stamp) {
48	>	assertTrue(lock.isReadLocked());
49	>	assertValid(lock, stamp);
50	>	lock.unlockRead(stamp);
51		assertFalse(lock.isReadLocked());
52	<	assertEquals(lock.getReadLockCount(), 0);
52	>	assertTrue(lock.validate(stamp));
53		}
54
55	<	/**
56	<	* write-locking and read-locking an unlocked lock succeed
57	<	*/
71	<	public void testLock() {
72	<	StampedLock lock = new StampedLock();
73	<	assertFalse(lock.isWriteLocked());
74	<	assertFalse(lock.isReadLocked());
75	<	assertEquals(lock.getReadLockCount(), 0);
76	<	long s = lock.writeLock();
77	<	assertTrue(lock.isWriteLocked());
78	<	assertFalse(lock.isReadLocked());
79	<	assertEquals(lock.getReadLockCount(), 0);
80	<	lock.unlockWrite(s);
81	<	assertFalse(lock.isWriteLocked());
82	<	assertFalse(lock.isReadLocked());
83	<	assertEquals(lock.getReadLockCount(), 0);
84	<	long rs = lock.readLock();
85	<	assertFalse(lock.isWriteLocked());
86	<	assertTrue(lock.isReadLocked());
87	<	assertEquals(lock.getReadLockCount(), 1);
88	<	lock.unlockRead(rs);
89	<	assertFalse(lock.isWriteLocked());
90	<	assertFalse(lock.isReadLocked());
91	<	assertEquals(lock.getReadLockCount(), 0);
55	>	long assertNonZero(long v) {
56	>	assertTrue(v != 0L);
57	>	return v;
58		}
59
60	<	/**
61	<	* unlock releases either a read or write lock
62	<	*/
63	<	public void testUnlock() {
98	<	StampedLock lock = new StampedLock();
99	<	assertFalse(lock.isWriteLocked());
100	<	assertFalse(lock.isReadLocked());
101	<	assertEquals(lock.getReadLockCount(), 0);
102	<	long s = lock.writeLock();
103	<	assertTrue(lock.isWriteLocked());
104	<	assertFalse(lock.isReadLocked());
105	<	assertEquals(lock.getReadLockCount(), 0);
106	<	lock.unlock(s);
107	<	assertFalse(lock.isWriteLocked());
108	<	assertFalse(lock.isReadLocked());
109	<	assertEquals(lock.getReadLockCount(), 0);
110	<	long rs = lock.readLock();
111	<	assertFalse(lock.isWriteLocked());
112	<	assertTrue(lock.isReadLocked());
113	<	assertEquals(lock.getReadLockCount(), 1);
114	<	lock.unlock(rs);
115	<	assertFalse(lock.isWriteLocked());
116	<	assertFalse(lock.isReadLocked());
117	<	assertEquals(lock.getReadLockCount(), 0);
60	>	long assertValid(StampedLock lock, long stamp) {
61	>	assertTrue(stamp != 0L);
62	>	assertTrue(lock.validate(stamp));
63	>	return stamp;
64		}
65
66	<	/**
121	<	* tryUnlockRead/Write succeeds if locked in associated mode else
122	<	* returns false
123	<	*/
124	<	public void testTryUnlock() {
125	<	StampedLock lock = new StampedLock();
126	<	assertFalse(lock.isWriteLocked());
127	<	assertFalse(lock.isReadLocked());
128	<	assertEquals(lock.getReadLockCount(), 0);
129	<	long s = lock.writeLock();
130	<	assertTrue(lock.isWriteLocked());
131	<	assertFalse(lock.isReadLocked());
132	<	assertEquals(lock.getReadLockCount(), 0);
133	<	assertFalse(lock.tryUnlockRead());
134	<	assertTrue(lock.tryUnlockWrite());
135	<	assertFalse(lock.tryUnlockWrite());
136	<	assertFalse(lock.tryUnlockRead());
137	<	assertFalse(lock.isWriteLocked());
66	>	void assertUnlocked(StampedLock lock) {
67		assertFalse(lock.isReadLocked());
139	–	assertEquals(lock.getReadLockCount(), 0);
140	–	long rs = lock.readLock();
141	–	assertFalse(lock.isWriteLocked());
142	–	assertTrue(lock.isReadLocked());
143	–	assertEquals(lock.getReadLockCount(), 1);
144	–	assertFalse(lock.tryUnlockWrite());
145	–	assertTrue(lock.tryUnlockRead());
146	–	assertFalse(lock.tryUnlockRead());
147	–	assertFalse(lock.tryUnlockWrite());
68		assertFalse(lock.isWriteLocked());
69	<	assertFalse(lock.isReadLocked());
70	<	assertEquals(lock.getReadLockCount(), 0);
69	>	assertEquals(0, lock.getReadLockCount());
70	>	assertValid(lock, lock.tryOptimisticRead());
71		}
72
73	<	/**
74	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
75	<	*/
76	<	public void testWriteUnlock_IMSE() {
77	<	StampedLock lock = new StampedLock();
78	<	try {
79	<	lock.unlockWrite(0L);
80	<	shouldThrow();
81	<	} catch (IllegalMonitorStateException success) {}
73	>	List<Action> lockLockers(Lock lock) {
74	>	List<Action> lockers = new ArrayList<>();
75	>	lockers.add(() -> lock.lock());
76	>	lockers.add(() -> lock.lockInterruptibly());
77	>	lockers.add(() -> lock.tryLock());
78	>	lockers.add(() -> lock.tryLock(Long.MIN_VALUE, DAYS));
79	>	lockers.add(() -> lock.tryLock(0L, DAYS));
80	>	lockers.add(() -> lock.tryLock(Long.MAX_VALUE, DAYS));
81	>	return lockers;
82	>	}
83	>
84	>	List<Function<StampedLock, Long>> readLockers() {
85	>	List<Function<StampedLock, Long>> readLockers = new ArrayList<>();
86	>	readLockers.add(sl -> sl.readLock());
87	>	readLockers.add(sl -> sl.tryReadLock());
88	>	readLockers.add(sl -> readLockInterruptiblyUninterrupted(sl));
89	>	readLockers.add(sl -> tryReadLockUninterrupted(sl, Long.MIN_VALUE, DAYS));
90	>	readLockers.add(sl -> tryReadLockUninterrupted(sl, 0L, DAYS));
91	>	readLockers.add(sl -> sl.tryConvertToReadLock(sl.tryOptimisticRead()));
92	>	return readLockers;
93	>	}
94	>
95	>	List<BiConsumer<StampedLock, Long>> readUnlockers() {
96	>	List<BiConsumer<StampedLock, Long>> readUnlockers = new ArrayList<>();
97	>	readUnlockers.add((sl, stamp) -> sl.unlockRead(stamp));
98	>	readUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockRead()));
99	>	readUnlockers.add((sl, stamp) -> sl.asReadLock().unlock());
100	>	readUnlockers.add((sl, stamp) -> sl.unlock(stamp));
101	>	readUnlockers.add((sl, stamp) -> assertValid(sl, sl.tryConvertToOptimisticRead(stamp)));
102	>	return readUnlockers;
103	>	}
104	>
105	>	List<Function<StampedLock, Long>> writeLockers() {
106	>	List<Function<StampedLock, Long>> writeLockers = new ArrayList<>();
107	>	writeLockers.add(sl -> sl.writeLock());
108	>	writeLockers.add(sl -> sl.tryWriteLock());
109	>	writeLockers.add(sl -> writeLockInterruptiblyUninterrupted(sl));
110	>	writeLockers.add(sl -> tryWriteLockUninterrupted(sl, Long.MIN_VALUE, DAYS));
111	>	writeLockers.add(sl -> tryWriteLockUninterrupted(sl, 0L, DAYS));
112	>	writeLockers.add(sl -> sl.tryConvertToWriteLock(sl.tryOptimisticRead()));
113	>	return writeLockers;
114	>	}
115	>
116	>	List<BiConsumer<StampedLock, Long>> writeUnlockers() {
117	>	List<BiConsumer<StampedLock, Long>> writeUnlockers = new ArrayList<>();
118	>	writeUnlockers.add((sl, stamp) -> sl.unlockWrite(stamp));
119	>	writeUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockWrite()));
120	>	writeUnlockers.add((sl, stamp) -> sl.asWriteLock().unlock());
121	>	writeUnlockers.add((sl, stamp) -> sl.unlock(stamp));
122	>	writeUnlockers.add((sl, stamp) -> assertValid(sl, sl.tryConvertToOptimisticRead(stamp)));
123	>	return writeUnlockers;
124		}
125
126		/**
127	<	* write-unlocking an unlocked lock throws IllegalMonitorStateException
127	>	* Constructed StampedLock is in unlocked state
128		*/
129	<	public void testWriteUnlock_IMSE2() {
130	<	StampedLock lock = new StampedLock();
169	<	try {
170	<	long s = lock.writeLock();
171	<	lock.unlockWrite(s);
172	<	lock.unlockWrite(s);
173	<	shouldThrow();
174	<	} catch (IllegalMonitorStateException success) {}
129	>	public void testConstructor() {
130	>	assertUnlocked(new StampedLock());
131		}
132
133		/**
134	<	* write-unlocking after readlock throws IllegalMonitorStateException
134	>	* write-locking, then unlocking, an unlocked lock succeed
135		*/
136	<	public void testWriteUnlock_IMSE3() {
136	>	public void testWriteLock_lockUnlock() {
137		StampedLock lock = new StampedLock();
138	<	try {
139	<	long s = lock.readLock();
140	<	lock.unlockWrite(s);
141	<	shouldThrow();
142	<	} catch (IllegalMonitorStateException success) {}
138	>
139	>	for (Function<StampedLock, Long> writeLocker : writeLockers())
140	>	for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) {
141	>	assertFalse(lock.isWriteLocked());
142	>	assertFalse(lock.isReadLocked());
143	>	assertEquals(0, lock.getReadLockCount());
144	>
145	>	long s = writeLocker.apply(lock);
146	>	assertValid(lock, s);
147	>	assertTrue(lock.isWriteLocked());
148	>	assertFalse(lock.isReadLocked());
149	>	assertEquals(0, lock.getReadLockCount());
150	>	writeUnlocker.accept(lock, s);
151	>	assertUnlocked(lock);
152	>	}
153		}
154
155		/**
156	<	* read-unlocking an unlocked lock throws IllegalMonitorStateException
156	>	* read-locking, then unlocking, an unlocked lock succeed
157		*/
158	<	public void testReadUnlock_IMSE() {
158	>	public void testReadLock_lockUnlock() {
159		StampedLock lock = new StampedLock();
160	<	try {
161	<	long s = lock.readLock();
162	<	lock.unlockRead(s);
163	<	lock.unlockRead(s);
164	<	shouldThrow();
165	<	} catch (IllegalMonitorStateException success) {}
160	>
161	>	for (Function<StampedLock, Long> readLocker : readLockers())
162	>	for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) {
163	>	long s = 42;
164	>	for (int i = 0; i < 2; i++) {
165	>	s = assertValid(lock, readLocker.apply(lock));
166	>	assertFalse(lock.isWriteLocked());
167	>	assertTrue(lock.isReadLocked());
168	>	assertEquals(i + 1, lock.getReadLockCount());
169	>	}
170	>	for (int i = 0; i < 2; i++) {
171	>	assertFalse(lock.isWriteLocked());
172	>	assertTrue(lock.isReadLocked());
173	>	assertEquals(2 - i, lock.getReadLockCount());
174	>	readUnlocker.accept(lock, s);
175	>	}
176	>	assertUnlocked(lock);
177	>	}
178		}
179
180		/**
181	<	* read-unlocking an unlocked lock throws IllegalMonitorStateException
181	>	* tryUnlockWrite fails if not write locked
182		*/
183	<	public void testReadUnlock_IMSE2() {
183	>	public void testTryUnlockWrite_failure() {
184		StampedLock lock = new StampedLock();
185	<	try {
186	<	lock.unlockRead(0L);
187	<	shouldThrow();
188	<	} catch (IllegalMonitorStateException success) {}
185	>	assertFalse(lock.tryUnlockWrite());
186	>
187	>	for (Function<StampedLock, Long> readLocker : readLockers())
188	>	for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) {
189	>	long s = assertValid(lock, readLocker.apply(lock));
190	>	assertFalse(lock.tryUnlockWrite());
191	>	assertTrue(lock.isReadLocked());
192	>	readUnlocker.accept(lock, s);
193	>	assertUnlocked(lock);
194	>	}
195		}
196
197		/**
198	<	* read-unlocking after writeLock throws IllegalMonitorStateException
198	>	* tryUnlockRead fails if not read locked
199		*/
200	<	public void testReadUnlock_IMSE3() {
200	>	public void testTryUnlockRead_failure() {
201		StampedLock lock = new StampedLock();
202	<	try {
203	<	long s = lock.writeLock();
204	<	lock.unlockRead(s);
205	<	shouldThrow();
206	<	} catch (IllegalMonitorStateException success) {}
202	>	assertFalse(lock.tryUnlockRead());
203	>
204	>	for (Function<StampedLock, Long> writeLocker : writeLockers())
205	>	for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) {
206	>	long s = writeLocker.apply(lock);
207	>	assertFalse(lock.tryUnlockRead());
208	>	assertTrue(lock.isWriteLocked());
209	>	writeUnlocker.accept(lock, s);
210	>	assertUnlocked(lock);
211	>	}
212		}
213
214		/**
215	<	* validate(0) fails
215	>	* validate(0L) fails
216		*/
217		public void testValidate0() {
218		StampedLock lock = new StampedLock();
#	Line 231 | Line 220 | public class StampedLockTest extends JSR
220		}
221
222		/**
223	<	* A stamp obtained from a successful lock operation validates
223	>	* A stamp obtained from a successful lock operation validates while the lock is held
224		*/
225		public void testValidate() throws InterruptedException {
226		StampedLock lock = new StampedLock();
227	<	long s = lock.writeLock();
228	<	assertTrue(lock.validate(s));
229	<	lock.unlockWrite(s);
230	<	s = lock.readLock();
231	<	assertTrue(lock.validate(s));
232	<	lock.unlockRead(s);
233	<	assertTrue((s = lock.tryWriteLock()) != 0L);
234	<	assertTrue(lock.validate(s));
235	<	lock.unlockWrite(s);
236	<	assertTrue((s = lock.tryReadLock()) != 0L);
237	<	assertTrue(lock.validate(s));
238	<	lock.unlockRead(s);
239	<	assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L);
240	<	assertTrue(lock.validate(s));
252	<	lock.unlockWrite(s);
253	<	assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L);
254	<	assertTrue(lock.validate(s));
255	<	lock.unlockRead(s);
256	<	assertTrue((s = lock.tryOptimisticRead()) != 0L);
227	>
228	>	for (Function<StampedLock, Long> readLocker : readLockers())
229	>	for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) {
230	>	long s = assertNonZero(readLocker.apply(lock));
231	>	assertTrue(lock.validate(s));
232	>	readUnlocker.accept(lock, s);
233	>	}
234	>
235	>	for (Function<StampedLock, Long> writeLocker : writeLockers())
236	>	for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) {
237	>	long s = assertNonZero(writeLocker.apply(lock));
238	>	assertTrue(lock.validate(s));
239	>	writeUnlocker.accept(lock, s);
240	>	}
241		}
242
243		/**
#	Line 261 | Line 245 | public class StampedLockTest extends JSR
245		*/
246		public void testValidate2() throws InterruptedException {
247		StampedLock lock = new StampedLock();
248	<	long s;
265	<	assertTrue((s = lock.writeLock()) != 0L);
248	>	long s = assertNonZero(lock.writeLock());
249		assertTrue(lock.validate(s));
250		assertFalse(lock.validate(lock.tryWriteLock()));
251	<	assertFalse(lock.validate(lock.tryWriteLock(10L, MILLISECONDS)));
251	>	assertFalse(lock.validate(lock.tryWriteLock(randomExpiredTimeout(),
252	>	randomTimeUnit())));
253		assertFalse(lock.validate(lock.tryReadLock()));
254	<	assertFalse(lock.validate(lock.tryReadLock(10L, MILLISECONDS)));
254	>	assertFalse(lock.validate(lock.tryWriteLock(randomExpiredTimeout(),
255	>	randomTimeUnit())));
256		assertFalse(lock.validate(lock.tryOptimisticRead()));
257		lock.unlockWrite(s);
258		}
259
260	+	void assertThrowInterruptedExceptionWhenPreInterrupted(Action[] actions) {
261	+	for (Action action : actions) {
262	+	Thread.currentThread().interrupt();
263	+	try {
264	+	action.run();
265	+	shouldThrow();
266	+	}
267	+	catch (InterruptedException success) {}
268	+	catch (Throwable fail) { threadUnexpectedException(fail); }
269	+	assertFalse(Thread.interrupted());
270	+	}
271	+	}
272	+
273		/**
274	<	* writeLockInterruptibly is interruptible
274	>	* interruptible operations throw InterruptedException when pre-interrupted
275		*/
276	<	public void testWriteLockInterruptibly_Interruptible()
279	<	throws InterruptedException {
280	<	final CountDownLatch running = new CountDownLatch(1);
276	>	public void testInterruptibleOperationsThrowInterruptedExceptionWhenPreInterrupted() {
277		final StampedLock lock = new StampedLock();
282	–	long s = lock.writeLock();
283	–	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
284	–	public void realRun() throws InterruptedException {
285	–	running.countDown();
286	–	lock.writeLockInterruptibly();
287	–	}});
278
279	<	running.await();
280	<	waitForThreadToEnterWaitState(t, 100);
281	<	t.interrupt();
282	<	awaitTermination(t);
283	<	releaseWriteLock(lock, s);
279	>	Action[] interruptibleLockActions = {
280	>	() -> lock.writeLockInterruptibly(),
281	>	() -> lock.tryWriteLock(Long.MIN_VALUE, DAYS),
282	>	() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS),
283	>	() -> lock.readLockInterruptibly(),
284	>	() -> lock.tryReadLock(Long.MIN_VALUE, DAYS),
285	>	() -> lock.tryReadLock(Long.MAX_VALUE, DAYS),
286	>	() -> lock.asWriteLock().lockInterruptibly(),
287	>	() -> lock.asWriteLock().tryLock(0L, DAYS),
288	>	() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS),
289	>	() -> lock.asReadLock().lockInterruptibly(),
290	>	() -> lock.asReadLock().tryLock(0L, DAYS),
291	>	() -> lock.asReadLock().tryLock(Long.MAX_VALUE, DAYS),
292	>	};
293	>	shuffle(interruptibleLockActions);
294	>
295	>	assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions);
296	>	{
297	>	long s = lock.writeLock();
298	>	assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions);
299	>	lock.unlockWrite(s);
300	>	}
301	>	{
302	>	long s = lock.readLock();
303	>	assertThrowInterruptedExceptionWhenPreInterrupted(interruptibleLockActions);
304	>	lock.unlockRead(s);
305	>	}
306	>	}
307	>
308	>	void assertThrowInterruptedExceptionWhenInterrupted(Action[] actions) {
309	>	int n = actions.length;
310	>	Future<?>[] futures = new Future<?>[n];
311	>	CountDownLatch threadsStarted = new CountDownLatch(n);
312	>	CountDownLatch done = new CountDownLatch(n);
313	>
314	>	for (int i = 0; i < n; i++) {
315	>	Action action = actions[i];
316	>	futures[i] = cachedThreadPool.submit(new CheckedRunnable() {
317	>	public void realRun() throws Throwable {
318	>	threadsStarted.countDown();
319	>	try {
320	>	action.run();
321	>	shouldThrow();
322	>	}
323	>	catch (InterruptedException success) {}
324	>	catch (Throwable fail) { threadUnexpectedException(fail); }
325	>	assertFalse(Thread.interrupted());
326	>	done.countDown();
327	>	}});
328	>	}
329	>
330	>	await(threadsStarted);
331	>	assertEquals(n, done.getCount());
332	>	for (Future<?> future : futures) // Interrupt all the tasks
333	>	future.cancel(true);
334	>	await(done);
335		}
336
337		/**
338	<	* timed tryWriteLock is interruptible
338	>	* interruptible operations throw InterruptedException when write locked and interrupted
339		*/
340	<	public void testWriteTryLock_Interruptible() throws InterruptedException {
300	<	final CountDownLatch running = new CountDownLatch(1);
340	>	public void testInterruptibleOperationsThrowInterruptedExceptionWriteLockedInterrupted() {
341		final StampedLock lock = new StampedLock();
342		long s = lock.writeLock();
303	–	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
304	–	public void realRun() throws InterruptedException {
305	–	running.countDown();
306	–	lock.tryWriteLock(2 * LONG_DELAY_MS, MILLISECONDS);
307	–	}});
343
344	<	running.await();
345	<	waitForThreadToEnterWaitState(t, 100);
346	<	t.interrupt();
347	<	awaitTermination(t);
348	<	releaseWriteLock(lock, s);
344	>	Action[] interruptibleLockBlockingActions = {
345	>	() -> lock.writeLockInterruptibly(),
346	>	() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS),
347	>	() -> lock.readLockInterruptibly(),
348	>	() -> lock.tryReadLock(Long.MAX_VALUE, DAYS),
349	>	() -> lock.asWriteLock().lockInterruptibly(),
350	>	() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS),
351	>	() -> lock.asReadLock().lockInterruptibly(),
352	>	() -> lock.asReadLock().tryLock(Long.MAX_VALUE, DAYS),
353	>	};
354	>	shuffle(interruptibleLockBlockingActions);
355	>
356	>	assertThrowInterruptedExceptionWhenInterrupted(interruptibleLockBlockingActions);
357		}
358
359		/**
360	<	* readLockInterruptibly is interruptible
360	>	* interruptible operations throw InterruptedException when read locked and interrupted
361		*/
362	<	public void testReadLockInterruptibly_Interruptible()
320	<	throws InterruptedException {
321	<	final CountDownLatch running = new CountDownLatch(1);
362	>	public void testInterruptibleOperationsThrowInterruptedExceptionReadLockedInterrupted() {
363		final StampedLock lock = new StampedLock();
364	<	long s = lock.writeLock();
324	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
325	<	public void realRun() throws InterruptedException {
326	<	running.countDown();
327	<	lock.readLockInterruptibly();
328	<	}});
364	>	long s = lock.readLock();
365
366	<	running.await();
367	<	waitForThreadToEnterWaitState(t, 100);
368	<	t.interrupt();
369	<	awaitTermination(t);
370	<	releaseWriteLock(lock, s);
366	>	Action[] interruptibleLockBlockingActions = {
367	>	() -> lock.writeLockInterruptibly(),
368	>	() -> lock.tryWriteLock(Long.MAX_VALUE, DAYS),
369	>	() -> lock.asWriteLock().lockInterruptibly(),
370	>	() -> lock.asWriteLock().tryLock(Long.MAX_VALUE, DAYS),
371	>	};
372	>	shuffle(interruptibleLockBlockingActions);
373	>
374	>	assertThrowInterruptedExceptionWhenInterrupted(interruptibleLockBlockingActions);
375		}
376
377		/**
378	<	* timed tryReadLock is interruptible
378	>	* Non-interruptible operations ignore and preserve interrupt status
379		*/
380	<	public void testReadTryLock_Interruptible() throws InterruptedException {
341	<	final CountDownLatch running = new CountDownLatch(1);
380	>	public void testNonInterruptibleOperationsIgnoreInterrupts() {
381		final StampedLock lock = new StampedLock();
382	<	long s = lock.writeLock();
344	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
345	<	public void realRun() throws InterruptedException {
346	<	running.countDown();
347	<	lock.tryReadLock(2 * LONG_DELAY_MS, MILLISECONDS);
348	<	}});
382	>	Thread.currentThread().interrupt();
383
384	<	running.await();
385	<	waitForThreadToEnterWaitState(t, 100);
386	<	t.interrupt();
387	<	awaitTermination(t);
388	<	releaseWriteLock(lock, s);
384	>	for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) {
385	>	long s = assertValid(lock, lock.readLock());
386	>	readUnlocker.accept(lock, s);
387	>	s = assertValid(lock, lock.tryReadLock());
388	>	readUnlocker.accept(lock, s);
389	>	}
390	>
391	>	lock.asReadLock().lock();
392	>	lock.asReadLock().unlock();
393	>
394	>	for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) {
395	>	long s = assertValid(lock, lock.writeLock());
396	>	writeUnlocker.accept(lock, s);
397	>	s = assertValid(lock, lock.tryWriteLock());
398	>	writeUnlocker.accept(lock, s);
399	>	}
400	>
401	>	lock.asWriteLock().lock();
402	>	lock.asWriteLock().unlock();
403	>
404	>	assertTrue(Thread.interrupted());
405		}
406
407		/**
408		* tryWriteLock on an unlocked lock succeeds
409		*/
410	<	public void testWriteTryLock() {
410	>	public void testTryWriteLock() {
411		final StampedLock lock = new StampedLock();
412		long s = lock.tryWriteLock();
413		assertTrue(s != 0L);
414		assertTrue(lock.isWriteLocked());
415	<	long s2 = lock.tryWriteLock();
366	<	assertEquals(s2, 0L);
415	>	assertEquals(0L, lock.tryWriteLock());
416		releaseWriteLock(lock, s);
417		}
418
419		/**
420		* tryWriteLock fails if locked
421		*/
422	<	public void testWriteTryLockWhenLocked() {
422	>	public void testTryWriteLockWhenLocked() {
423		final StampedLock lock = new StampedLock();
424		long s = lock.writeLock();
425		Thread t = newStartedThread(new CheckedRunnable() {
426		public void realRun() {
427	<	long ws = lock.tryWriteLock();
379	<	assertTrue(ws == 0L);
427	>	assertEquals(0L, lock.tryWriteLock());
428		}});
429
430	+	assertEquals(0L, lock.tryWriteLock());
431		awaitTermination(t);
432		releaseWriteLock(lock, s);
433		}
#	Line 386 | Line 435 | public class StampedLockTest extends JSR
435		/**
436		* tryReadLock fails if write-locked
437		*/
438	<	public void testReadTryLockWhenLocked() {
438	>	public void testTryReadLockWhenLocked() {
439		final StampedLock lock = new StampedLock();
440		long s = lock.writeLock();
441		Thread t = newStartedThread(new CheckedRunnable() {
442		public void realRun() {
443	<	long rs = lock.tryReadLock();
395	<	assertEquals(rs, 0L);
443	>	assertEquals(0L, lock.tryReadLock());
444		}});
445
446	+	assertEquals(0L, lock.tryReadLock());
447		awaitTermination(t);
448		releaseWriteLock(lock, s);
449		}
#	Line 408 | Line 457 | public class StampedLockTest extends JSR
457		Thread t = newStartedThread(new CheckedRunnable() {
458		public void realRun() throws InterruptedException {
459		long s2 = lock.tryReadLock();
460	<	assertTrue(s2 != 0L);
460	>	assertValid(lock, s2);
461		lock.unlockRead(s2);
462		long s3 = lock.tryReadLock(LONG_DELAY_MS, MILLISECONDS);
463	<	assertTrue(s3 != 0L);
463	>	assertValid(lock, s3);
464		lock.unlockRead(s3);
465		long s4 = lock.readLock();
466	+	assertValid(lock, s4);
467		lock.unlockRead(s4);
468	+	lock.asReadLock().lock();
469	+	lock.asReadLock().unlock();
470	+	lock.asReadLock().lockInterruptibly();
471	+	lock.asReadLock().unlock();
472	+	lock.asReadLock().tryLock(Long.MIN_VALUE, DAYS);
473	+	lock.asReadLock().unlock();
474		}});
475
476		awaitTermination(t);
#	Line 422 | Line 478 | public class StampedLockTest extends JSR
478		}
479
480		/**
481	<	* A writelock succeeds only after a reading thread unlocks
481	>	* writeLock() succeeds only after a reading thread unlocks
482		*/
483		public void testWriteAfterReadLock() throws InterruptedException {
484	<	final CountDownLatch running = new CountDownLatch(1);
484	>	final CountDownLatch aboutToLock = new CountDownLatch(1);
485		final StampedLock lock = new StampedLock();
486		long rs = lock.readLock();
487		Thread t = newStartedThread(new CheckedRunnable() {
488		public void realRun() {
489	<	running.countDown();
489	>	aboutToLock.countDown();
490		long s = lock.writeLock();
491	+	assertTrue(lock.isWriteLocked());
492	+	assertFalse(lock.isReadLocked());
493		lock.unlockWrite(s);
494		}});
495
496	<	running.await();
497	<	waitForThreadToEnterWaitState(t, 100);
496	>	await(aboutToLock);
497	>	assertThreadBlocks(t, Thread.State.WAITING);
498		assertFalse(lock.isWriteLocked());
499	+	assertTrue(lock.isReadLocked());
500		lock.unlockRead(rs);
501		awaitTermination(t);
502	<	assertFalse(lock.isWriteLocked());
502	>	assertUnlocked(lock);
503		}
504
505		/**
506	<	* A writelock succeeds only after reading threads unlock
506	>	* writeLock() succeeds only after reading threads unlock
507		*/
508		public void testWriteAfterMultipleReadLocks() {
509		final StampedLock lock = new StampedLock();
#	Line 463 | Line 522 | public class StampedLockTest extends JSR
522		lock.unlockWrite(ws);
523		}});
524
525	+	assertTrue(lock.isReadLocked());
526		assertFalse(lock.isWriteLocked());
527		lock.unlockRead(s);
528		awaitTermination(t2);
529	<	assertFalse(lock.isWriteLocked());
529	>	assertUnlocked(lock);
530		}
531
532		/**
533	<	* Readlocks succeed only after a writing thread unlocks
533	>	* readLock() succeed only after a writing thread unlocks
534		*/
535		public void testReadAfterWriteLock() {
536		final StampedLock lock = new StampedLock();
537	+	final CountDownLatch threadsStarted = new CountDownLatch(2);
538		final long s = lock.writeLock();
539	<	Thread t1 = newStartedThread(new CheckedRunnable() {
539	>	final Runnable acquireReleaseReadLock = new CheckedRunnable() {
540		public void realRun() {
541	+	threadsStarted.countDown();
542		long rs = lock.readLock();
543	+	assertTrue(lock.isReadLocked());
544	+	assertFalse(lock.isWriteLocked());
545		lock.unlockRead(rs);
546	<	}});
547	<	Thread t2 = newStartedThread(new CheckedRunnable() {
548	<	public void realRun() {
549	<	long rs = lock.readLock();
550	<	lock.unlockRead(rs);
551	<	}});
552	<
546	>	}};
547	>	Thread t1 = newStartedThread(acquireReleaseReadLock);
548	>	Thread t2 = newStartedThread(acquireReleaseReadLock);
549	>
550	>	await(threadsStarted);
551	>	assertThreadBlocks(t1, Thread.State.WAITING);
552	>	assertThreadBlocks(t2, Thread.State.WAITING);
553	>	assertTrue(lock.isWriteLocked());
554	>	assertFalse(lock.isReadLocked());
555		releaseWriteLock(lock, s);
556		awaitTermination(t1);
557		awaitTermination(t2);
558	+	assertUnlocked(lock);
559		}
560
561		/**
562	<	* tryReadLock succeeds if readlocked but not writelocked
562	>	* tryReadLock succeeds if read locked but not write locked
563		*/
564		public void testTryLockWhenReadLocked() {
565		final StampedLock lock = new StampedLock();
#	Line 500 | Line 567 | public class StampedLockTest extends JSR
567		Thread t = newStartedThread(new CheckedRunnable() {
568		public void realRun() {
569		long rs = lock.tryReadLock();
570	<	threadAssertTrue(rs != 0L);
570	>	assertValid(lock, rs);
571		lock.unlockRead(rs);
572		}});
573
#	Line 509 | Line 576 | public class StampedLockTest extends JSR
576		}
577
578		/**
579	<	* tryWriteLock fails when readlocked
579	>	* tryWriteLock fails when read locked
580		*/
581	<	public void testWriteTryLockWhenReadLocked() {
581	>	public void testTryWriteLockWhenReadLocked() {
582		final StampedLock lock = new StampedLock();
583		long s = lock.readLock();
584		Thread t = newStartedThread(new CheckedRunnable() {
585		public void realRun() {
586	<	long ws = lock.tryWriteLock();
520	<	threadAssertEquals(ws, 0L);
586	>	threadAssertEquals(0L, lock.tryWriteLock());
587		}});
588
589		awaitTermination(t);
#	Line 525 | Line 591 | public class StampedLockTest extends JSR
591		}
592
593		/**
594	<	* timed tryWriteLock times out if locked
594	>	* timed lock operations time out if lock not available
595		*/
596	<	public void testWriteTryLock_Timeout() {
596	>	public void testTimedLock_Timeout() throws Exception {
597	>	ArrayList<Future<?>> futures = new ArrayList<>();
598	>
599	>	// Write locked
600		final StampedLock lock = new StampedLock();
601	<	long s = lock.writeLock();
602	<	Thread t = newStartedThread(new CheckedRunnable() {
601	>	long stamp = lock.writeLock();
602	>	assertEquals(0L, lock.tryReadLock(0L, DAYS));
603	>	assertEquals(0L, lock.tryReadLock(Long.MIN_VALUE, DAYS));
604	>	assertFalse(lock.asReadLock().tryLock(0L, DAYS));
605	>	assertFalse(lock.asReadLock().tryLock(Long.MIN_VALUE, DAYS));
606	>	assertEquals(0L, lock.tryWriteLock(0L, DAYS));
607	>	assertEquals(0L, lock.tryWriteLock(Long.MIN_VALUE, DAYS));
608	>	assertFalse(lock.asWriteLock().tryLock(0L, DAYS));
609	>	assertFalse(lock.asWriteLock().tryLock(Long.MIN_VALUE, DAYS));
610	>
611	>	futures.add(cachedThreadPool.submit(new CheckedRunnable() {
612		public void realRun() throws InterruptedException {
613		long startTime = System.nanoTime();
614	<	long timeoutMillis = 10;
615	<	long ws = lock.tryWriteLock(timeoutMillis, MILLISECONDS);
616	<	assertEquals(ws, 0L);
539	<	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
540	<	}});
614	>	assertEquals(0L, lock.tryWriteLock(timeoutMillis(), MILLISECONDS));
615	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
616	>	}}));
617
618	<	awaitTermination(t);
619	<	releaseWriteLock(lock, s);
620	<	}
618	>	futures.add(cachedThreadPool.submit(new CheckedRunnable() {
619	>	public void realRun() throws InterruptedException {
620	>	long startTime = System.nanoTime();
621	>	assertEquals(0L, lock.tryReadLock(timeoutMillis(), MILLISECONDS));
622	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
623	>	}}));
624	>
625	>	// Read locked
626	>	final StampedLock lock2 = new StampedLock();
627	>	long stamp2 = lock2.readLock();
628	>	assertEquals(0L, lock2.tryWriteLock(0L, DAYS));
629	>	assertEquals(0L, lock2.tryWriteLock(Long.MIN_VALUE, DAYS));
630	>	assertFalse(lock2.asWriteLock().tryLock(0L, DAYS));
631	>	assertFalse(lock2.asWriteLock().tryLock(Long.MIN_VALUE, DAYS));
632
633	<	/**
547	<	* timed tryReadLock times out if write-locked
548	<	*/
549	<	public void testReadTryLock_Timeout() {
550	<	final StampedLock lock = new StampedLock();
551	<	long s = lock.writeLock();
552	<	Thread t = newStartedThread(new CheckedRunnable() {
633	>	futures.add(cachedThreadPool.submit(new CheckedRunnable() {
634		public void realRun() throws InterruptedException {
635		long startTime = System.nanoTime();
636	<	long timeoutMillis = 10;
637	<	long rs = lock.tryReadLock(timeoutMillis, MILLISECONDS);
638	<	assertEquals(rs, 0L);
558	<	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
559	<	}});
636	>	assertEquals(0L, lock2.tryWriteLock(timeoutMillis(), MILLISECONDS));
637	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
638	>	}}));
639
640	<	awaitTermination(t);
641	<	assertTrue(lock.isWriteLocked());
642	<	lock.unlockWrite(s);
640	>	for (Future<?> future : futures)
641	>	assertNull(future.get());
642	>
643	>	releaseWriteLock(lock, stamp);
644	>	releaseReadLock(lock2, stamp2);
645		}
646
647		/**
648	<	* writeLockInterruptibly succeeds if unlocked, else is interruptible
648	>	* writeLockInterruptibly succeeds if unlocked
649		*/
650		public void testWriteLockInterruptibly() throws InterruptedException {
570	–	final CountDownLatch running = new CountDownLatch(1);
651		final StampedLock lock = new StampedLock();
652		long s = lock.writeLockInterruptibly();
573	–	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
574	–	public void realRun() throws InterruptedException {
575	–	running.countDown();
576	–	lock.writeLockInterruptibly();
577	–	}});
578	–
579	–	running.await();
580	–	waitForThreadToEnterWaitState(t, 100);
581	–	t.interrupt();
653		assertTrue(lock.isWriteLocked());
583	–	awaitTermination(t);
654		releaseWriteLock(lock, s);
655		}
656
657		/**
658	<	* readLockInterruptibly succeeds if lock free else is interruptible
658	>	* readLockInterruptibly succeeds if lock free
659		*/
660		public void testReadLockInterruptibly() throws InterruptedException {
591	–	final CountDownLatch running = new CountDownLatch(1);
661		final StampedLock lock = new StampedLock();
662	<	long s;
663	<	s = lock.readLockInterruptibly();
662	>
663	>	long s = assertValid(lock, lock.readLockInterruptibly());
664	>	assertTrue(lock.isReadLocked());
665		lock.unlockRead(s);
596	–	s = lock.writeLockInterruptibly();
597	–	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
598	–	public void realRun() throws InterruptedException {
599	–	running.countDown();
600	–	lock.readLockInterruptibly();
601	–	}});
666
667	<	running.await();
668	<	waitForThreadToEnterWaitState(t, 100);
669	<	t.interrupt();
606	<	awaitTermination(t);
607	<	releaseWriteLock(lock, s);
667	>	lock.asReadLock().lockInterruptibly();
668	>	assertTrue(lock.isReadLocked());
669	>	lock.asReadLock().unlock();
670		}
671
672		/**
#	Line 636 | Line 698 | public class StampedLockTest extends JSR
698		}
699
700		/**
701	<	* tryOptimisticRead succeeds and validates if unlocked, fails if locked
701	>	* tryOptimisticRead succeeds and validates if unlocked, fails if
702	>	* exclusively locked
703		*/
704		public void testValidateOptimistic() throws InterruptedException {
705		StampedLock lock = new StampedLock();
706	<	long s, p;
707	<	assertTrue((p = lock.tryOptimisticRead()) != 0L);
708	<	assertTrue(lock.validate(p));
709	<	assertTrue((s = lock.writeLock()) != 0L);
710	<	assertFalse((p = lock.tryOptimisticRead()) != 0L);
711	<	assertTrue(lock.validate(s));
712	<	lock.unlockWrite(s);
713	<	assertTrue((p = lock.tryOptimisticRead()) != 0L);
714	<	assertTrue(lock.validate(p));
715	<	assertTrue((s = lock.readLock()) != 0L);
716	<	assertTrue(lock.validate(s));
717	<	assertTrue((p = lock.tryOptimisticRead()) != 0L);
718	<	assertTrue(lock.validate(p));
719	<	lock.unlockRead(s);
720	<	assertTrue((s = lock.tryWriteLock()) != 0L);
721	<	assertTrue(lock.validate(s));
722	<	assertFalse((p = lock.tryOptimisticRead()) != 0L);
660	<	lock.unlockWrite(s);
661	<	assertTrue((s = lock.tryReadLock()) != 0L);
662	<	assertTrue(lock.validate(s));
663	<	assertTrue((p = lock.tryOptimisticRead()) != 0L);
664	<	lock.unlockRead(s);
665	<	assertTrue(lock.validate(p));
666	<	assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L);
667	<	assertFalse((p = lock.tryOptimisticRead()) != 0L);
668	<	assertTrue(lock.validate(s));
669	<	lock.unlockWrite(s);
670	<	assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L);
671	<	assertTrue(lock.validate(s));
672	<	assertTrue((p = lock.tryOptimisticRead()) != 0L);
673	<	lock.unlockRead(s);
674	<	assertTrue((p = lock.tryOptimisticRead()) != 0L);
706	>
707	>	assertValid(lock, lock.tryOptimisticRead());
708	>
709	>	for (Function<StampedLock, Long> writeLocker : writeLockers()) {
710	>	long s = assertValid(lock, writeLocker.apply(lock));
711	>	assertEquals(0L, lock.tryOptimisticRead());
712	>	releaseWriteLock(lock, s);
713	>	}
714	>
715	>	for (Function<StampedLock, Long> readLocker : readLockers()) {
716	>	long s = assertValid(lock, readLocker.apply(lock));
717	>	long p = assertValid(lock, lock.tryOptimisticRead());
718	>	releaseReadLock(lock, s);
719	>	assertTrue(lock.validate(p));
720	>	}
721	>
722	>	assertValid(lock, lock.tryOptimisticRead());
723		}
724
725		/**
726		* tryOptimisticRead stamp does not validate if a write lock intervenes
727		*/
728		public void testValidateOptimisticWriteLocked() {
729	<	StampedLock lock = new StampedLock();
730	<	long s, p;
731	<	assertTrue((p = lock.tryOptimisticRead()) != 0L);
684	<	assertTrue((s = lock.writeLock()) != 0L);
729	>	final StampedLock lock = new StampedLock();
730	>	final long p = assertValid(lock, lock.tryOptimisticRead());
731	>	final long s = assertValid(lock, lock.writeLock());
732		assertFalse(lock.validate(p));
733	<	assertFalse((p = lock.tryOptimisticRead()) != 0L);
733	>	assertEquals(0L, lock.tryOptimisticRead());
734		assertTrue(lock.validate(s));
735		lock.unlockWrite(s);
736		}
#	Line 694 | Line 741 | public class StampedLockTest extends JSR
741		*/
742		public void testValidateOptimisticWriteLocked2()
743		throws InterruptedException {
744	<	final CountDownLatch running = new CountDownLatch(1);
744	>	final CountDownLatch locked = new CountDownLatch(1);
745		final StampedLock lock = new StampedLock();
746	<	long s, p;
747	<	assertTrue((p = lock.tryOptimisticRead()) != 0L);
746	>	final long p = assertValid(lock, lock.tryOptimisticRead());
747	>
748		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
749		public void realRun() throws InterruptedException {
750		lock.writeLockInterruptibly();
751	<	running.countDown();
751	>	locked.countDown();
752		lock.writeLockInterruptibly();
753		}});
754
755	<	running.await();
755	>	await(locked);
756		assertFalse(lock.validate(p));
757	<	assertFalse((p = lock.tryOptimisticRead()) != 0L);
757	>	assertEquals(0L, lock.tryOptimisticRead());
758	>	assertThreadBlocks(t, Thread.State.WAITING);
759		t.interrupt();
760		awaitTermination(t);
761	+	assertTrue(lock.isWriteLocked());
762		}
763
764		/**
765	<	* tryConvertToOptimisticRead succeeds and validates if successfully locked,
765	>	* tryConvertToOptimisticRead succeeds and validates if successfully locked
766		*/
767		public void testTryConvertToOptimisticRead() throws InterruptedException {
768		StampedLock lock = new StampedLock();
769	<	long s, p;
770	<	s = 0L;
771	<	assertFalse((p = lock.tryConvertToOptimisticRead(s)) != 0L);
772	<	assertTrue((s = lock.tryOptimisticRead()) != 0L);
773	<	assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L);
725	<	assertTrue((s = lock.writeLock()) != 0L);
726	<	assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L);
727	<	assertTrue(lock.validate(p));
728	<	assertTrue((s = lock.readLock()) != 0L);
729	<	assertTrue(lock.validate(s));
730	<	assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L);
731	<	assertTrue(lock.validate(p));
732	<	assertTrue((s = lock.tryWriteLock()) != 0L);
733	<	assertTrue(lock.validate(s));
734	<	assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L);
735	<	assertTrue(lock.validate(p));
736	<	assertTrue((s = lock.tryReadLock()) != 0L);
737	<	assertTrue(lock.validate(s));
738	<	assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L);
739	<	assertTrue(lock.validate(p));
740	<	assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L);
741	<	assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L);
742	<	assertTrue(lock.validate(p));
743	<	assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L);
769	>	long s, p, q;
770	>	assertEquals(0L, lock.tryConvertToOptimisticRead(0L));
771	>
772	>	s = assertValid(lock, lock.tryOptimisticRead());
773	>	assertEquals(s, lock.tryConvertToOptimisticRead(s));
774		assertTrue(lock.validate(s));
775	<	assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L);
776	<	assertTrue(lock.validate(p));
775	>
776	>	for (Function<StampedLock, Long> writeLocker : writeLockers()) {
777	>	s = assertValid(lock, writeLocker.apply(lock));
778	>	p = assertValid(lock, lock.tryConvertToOptimisticRead(s));
779	>	assertFalse(lock.validate(s));
780	>	assertTrue(lock.validate(p));
781	>	assertUnlocked(lock);
782	>	}
783	>
784	>	for (Function<StampedLock, Long> readLocker : readLockers()) {
785	>	s = assertValid(lock, readLocker.apply(lock));
786	>	q = assertValid(lock, lock.tryOptimisticRead());
787	>	assertEquals(q, lock.tryConvertToOptimisticRead(q));
788	>	assertTrue(lock.validate(q));
789	>	assertTrue(lock.isReadLocked());
790	>	p = assertValid(lock, lock.tryConvertToOptimisticRead(s));
791	>	assertTrue(lock.validate(p));
792	>	assertTrue(lock.validate(s));
793	>	assertUnlocked(lock);
794	>	assertEquals(q, lock.tryConvertToOptimisticRead(q));
795	>	assertTrue(lock.validate(q));
796	>	}
797		}
798
799		/**
800	<	* tryConvertToReadLock succeeds and validates if successfully locked
751	<	* or lock free;
800	>	* tryConvertToReadLock succeeds for valid stamps
801		*/
802		public void testTryConvertToReadLock() throws InterruptedException {
803		StampedLock lock = new StampedLock();
804		long s, p;
805	<	s = 0L;
806	<	assertFalse((p = lock.tryConvertToReadLock(s)) != 0L);
807	<	assertTrue((s = lock.tryOptimisticRead()) != 0L);
808	<	assertTrue((p = lock.tryConvertToReadLock(s)) != 0L);
809	<	lock.unlockRead(p);
810	<	assertTrue((s = lock.writeLock()) != 0L);
811	<	assertTrue((p = lock.tryConvertToReadLock(s)) != 0L);
763	<	assertTrue(lock.validate(p));
764	<	lock.unlockRead(p);
765	<	assertTrue((s = lock.readLock()) != 0L);
766	<	assertTrue(lock.validate(s));
767	<	assertTrue((p = lock.tryConvertToReadLock(s)) != 0L);
768	<	assertTrue(lock.validate(p));
769	<	lock.unlockRead(p);
770	<	assertTrue((s = lock.tryWriteLock()) != 0L);
771	<	assertTrue(lock.validate(s));
772	<	assertTrue((p = lock.tryConvertToReadLock(s)) != 0L);
773	<	assertTrue(lock.validate(p));
774	<	lock.unlockRead(p);
775	<	assertTrue((s = lock.tryReadLock()) != 0L);
805	>
806	>	assertEquals(0L, lock.tryConvertToReadLock(0L));
807	>
808	>	s = assertValid(lock, lock.tryOptimisticRead());
809	>	p = assertValid(lock, lock.tryConvertToReadLock(s));
810	>	assertTrue(lock.isReadLocked());
811	>	assertEquals(1, lock.getReadLockCount());
812		assertTrue(lock.validate(s));
777	–	assertTrue((p = lock.tryConvertToReadLock(s)) != 0L);
778	–	assertTrue(lock.validate(p));
813		lock.unlockRead(p);
814	<	assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L);
815	<	assertTrue((p = lock.tryConvertToReadLock(s)) != 0L);
816	<	assertTrue(lock.validate(p));
814	>
815	>	s = assertValid(lock, lock.tryOptimisticRead());
816	>	lock.readLock();
817	>	p = assertValid(lock, lock.tryConvertToReadLock(s));
818	>	assertTrue(lock.isReadLocked());
819	>	assertEquals(2, lock.getReadLockCount());
820		lock.unlockRead(p);
784	–	assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L);
785	–	assertTrue(lock.validate(s));
786	–	assertTrue((p = lock.tryConvertToReadLock(s)) != 0L);
787	–	assertTrue(lock.validate(p));
821		lock.unlockRead(p);
822	+	assertUnlocked(lock);
823	+
824	+	for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) {
825	+	for (Function<StampedLock, Long> writeLocker : writeLockers()) {
826	+	s = assertValid(lock, writeLocker.apply(lock));
827	+	p = assertValid(lock, lock.tryConvertToReadLock(s));
828	+	assertFalse(lock.validate(s));
829	+	assertTrue(lock.isReadLocked());
830	+	assertEquals(1, lock.getReadLockCount());
831	+	readUnlocker.accept(lock, p);
832	+	}
833	+
834	+	for (Function<StampedLock, Long> readLocker : readLockers()) {
835	+	s = assertValid(lock, readLocker.apply(lock));
836	+	assertEquals(s, lock.tryConvertToReadLock(s));
837	+	assertTrue(lock.validate(s));
838	+	assertTrue(lock.isReadLocked());
839	+	assertEquals(1, lock.getReadLockCount());
840	+	readUnlocker.accept(lock, s);
841	+	}
842	+	}
843		}
844
845		/**
846	<	* tryConvertToWriteLock succeeds and validates if successfully locked
793	<	* or lock free;
846	>	* tryConvertToWriteLock succeeds if lock available; fails if multiply read locked
847		*/
848		public void testTryConvertToWriteLock() throws InterruptedException {
849		StampedLock lock = new StampedLock();
850		long s, p;
851	<	s = 0L;
852	<	assertFalse((p = lock.tryConvertToWriteLock(s)) != 0L);
851	>
852	>	assertEquals(0L, lock.tryConvertToWriteLock(0L));
853	>
854		assertTrue((s = lock.tryOptimisticRead()) != 0L);
855		assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L);
856	+	assertTrue(lock.isWriteLocked());
857		lock.unlockWrite(p);
858	<	assertTrue((s = lock.writeLock()) != 0L);
859	<	assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L);
860	<	assertTrue(lock.validate(p));
861	<	lock.unlockWrite(p);
862	<	assertTrue((s = lock.readLock()) != 0L);
863	<	assertTrue(lock.validate(s));
864	<	assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L);
865	<	assertTrue(lock.validate(p));
866	<	lock.unlockWrite(p);
867	<	assertTrue((s = lock.tryWriteLock()) != 0L);
868	<	assertTrue(lock.validate(s));
869	<	assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L);
870	<	assertTrue(lock.validate(p));
871	<	lock.unlockWrite(p);
872	<	assertTrue((s = lock.tryReadLock()) != 0L);
873	<	assertTrue(lock.validate(s));
874	<	assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L);
875	<	assertTrue(lock.validate(p));
876	<	lock.unlockWrite(p);
877	<	assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L);
878	<	assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L);
879	<	assertTrue(lock.validate(p));
880	<	lock.unlockWrite(p);
881	<	assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L);
882	<	assertTrue(lock.validate(s));
883	<	assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L);
884	<	assertTrue(lock.validate(p));
885	<	lock.unlockWrite(p);
858	>
859	>	for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) {
860	>	for (Function<StampedLock, Long> writeLocker : writeLockers()) {
861	>	s = assertValid(lock, writeLocker.apply(lock));
862	>	assertEquals(s, lock.tryConvertToWriteLock(s));
863	>	assertTrue(lock.validate(s));
864	>	assertTrue(lock.isWriteLocked());
865	>	writeUnlocker.accept(lock, s);
866	>	}
867	>
868	>	for (Function<StampedLock, Long> readLocker : readLockers()) {
869	>	s = assertValid(lock, readLocker.apply(lock));
870	>	p = assertValid(lock, lock.tryConvertToWriteLock(s));
871	>	assertFalse(lock.validate(s));
872	>	assertTrue(lock.validate(p));
873	>	assertTrue(lock.isWriteLocked());
874	>	writeUnlocker.accept(lock, p);
875	>	}
876	>	}
877	>
878	>	// failure if multiply read locked
879	>	for (Function<StampedLock, Long> readLocker : readLockers()) {
880	>	s = assertValid(lock, readLocker.apply(lock));
881	>	p = assertValid(lock, readLocker.apply(lock));
882	>	assertEquals(0L, lock.tryConvertToWriteLock(s));
883	>	assertTrue(lock.validate(s));
884	>	assertTrue(lock.validate(p));
885	>	assertEquals(2, lock.getReadLockCount());
886	>	lock.unlock(p);
887	>	lock.unlock(s);
888	>	assertUnlocked(lock);
889	>	}
890		}
891
892		/**
893		* asWriteLock can be locked and unlocked
894		*/
895	<	public void testAsWriteLock() {
895	>	public void testAsWriteLock() throws Throwable {
896		StampedLock sl = new StampedLock();
897		Lock lock = sl.asWriteLock();
898	<	lock.lock();
899	<	assertFalse(lock.tryLock());
900	<	lock.unlock();
901	<	assertTrue(lock.tryLock());
898	>	for (Action locker : lockLockers(lock)) {
899	>	locker.run();
900	>	assertTrue(sl.isWriteLocked());
901	>	assertFalse(sl.isReadLocked());
902	>	assertFalse(lock.tryLock());
903	>	lock.unlock();
904	>	assertUnlocked(sl);
905	>	}
906		}
907
908		/**
909		* asReadLock can be locked and unlocked
910		*/
911	<	public void testAsReadLock() {
911	>	public void testAsReadLock() throws Throwable {
912		StampedLock sl = new StampedLock();
913		Lock lock = sl.asReadLock();
914	<	lock.lock();
915	<	lock.unlock();
916	<	assertTrue(lock.tryLock());
914	>	for (Action locker : lockLockers(lock)) {
915	>	locker.run();
916	>	assertTrue(sl.isReadLocked());
917	>	assertFalse(sl.isWriteLocked());
918	>	assertEquals(1, sl.getReadLockCount());
919	>	locker.run();
920	>	assertTrue(sl.isReadLocked());
921	>	assertEquals(2, sl.getReadLockCount());
922	>	lock.unlock();
923	>	lock.unlock();
924	>	assertUnlocked(sl);
925	>	}
926		}
927
928		/**
929		* asReadWriteLock.writeLock can be locked and unlocked
930		*/
931	<	public void testAsReadWriteLockWriteLock() {
931	>	public void testAsReadWriteLockWriteLock() throws Throwable {
932		StampedLock sl = new StampedLock();
933		Lock lock = sl.asReadWriteLock().writeLock();
934	<	lock.lock();
935	<	assertFalse(lock.tryLock());
936	<	lock.unlock();
937	<	assertTrue(lock.tryLock());
934	>	for (Action locker : lockLockers(lock)) {
935	>	locker.run();
936	>	assertTrue(sl.isWriteLocked());
937	>	assertFalse(sl.isReadLocked());
938	>	assertFalse(lock.tryLock());
939	>	lock.unlock();
940	>	assertUnlocked(sl);
941	>	}
942		}
943
944		/**
945		* asReadWriteLock.readLock can be locked and unlocked
946		*/
947	<	public void testAsReadWriteLockReadLock() {
947	>	public void testAsReadWriteLockReadLock() throws Throwable {
948		StampedLock sl = new StampedLock();
949		Lock lock = sl.asReadWriteLock().readLock();
950	<	lock.lock();
951	<	lock.unlock();
952	<	assertTrue(lock.tryLock());
950	>	for (Action locker : lockLockers(lock)) {
951	>	locker.run();
952	>	assertTrue(sl.isReadLocked());
953	>	assertFalse(sl.isWriteLocked());
954	>	assertEquals(1, sl.getReadLockCount());
955	>	locker.run();
956	>	assertTrue(sl.isReadLocked());
957	>	assertEquals(2, sl.getReadLockCount());
958	>	lock.unlock();
959	>	lock.unlock();
960	>	assertUnlocked(sl);
961	>	}
962		}
963
964	+	/**
965	+	* Lock.newCondition throws UnsupportedOperationException
966	+	*/
967	+	public void testLockViewsDoNotSupportConditions() {
968	+	StampedLock sl = new StampedLock();
969	+	assertThrows(UnsupportedOperationException.class,
970	+	() -> sl.asWriteLock().newCondition(),
971	+	() -> sl.asReadLock().newCondition(),
972	+	() -> sl.asReadWriteLock().writeLock().newCondition(),
973	+	() -> sl.asReadWriteLock().readLock().newCondition());
974	+	}
975	+
976	+	/**
977	+	* Passing optimistic read stamps to unlock operations result in
978	+	* IllegalMonitorStateException
979	+	*/
980	+	public void testCannotUnlockOptimisticReadStamps() {
981	+	Runnable[] actions = {
982	+	() -> {
983	+	StampedLock sl = new StampedLock();
984	+	long stamp = assertValid(sl, sl.tryOptimisticRead());
985	+	sl.unlockRead(stamp);
986	+	},
987	+	() -> {
988	+	StampedLock sl = new StampedLock();
989	+	long stamp = sl.tryOptimisticRead();
990	+	sl.unlock(stamp);
991	+	},
992	+
993	+	() -> {
994	+	StampedLock sl = new StampedLock();
995	+	long stamp = sl.tryOptimisticRead();
996	+	sl.writeLock();
997	+	sl.unlock(stamp);
998	+	},
999	+	() -> {
1000	+	StampedLock sl = new StampedLock();
1001	+	sl.readLock();
1002	+	long stamp = assertValid(sl, sl.tryOptimisticRead());
1003	+	sl.unlockRead(stamp);
1004	+	},
1005	+	() -> {
1006	+	StampedLock sl = new StampedLock();
1007	+	sl.readLock();
1008	+	long stamp = assertValid(sl, sl.tryOptimisticRead());
1009	+	sl.unlock(stamp);
1010	+	},
1011	+
1012	+	() -> {
1013	+	StampedLock sl = new StampedLock();
1014	+	long stamp = sl.tryConvertToOptimisticRead(sl.writeLock());
1015	+	assertValid(sl, stamp);
1016	+	sl.writeLock();
1017	+	sl.unlockWrite(stamp);
1018	+	},
1019	+	() -> {
1020	+	StampedLock sl = new StampedLock();
1021	+	long stamp = sl.tryConvertToOptimisticRead(sl.writeLock());
1022	+	sl.writeLock();
1023	+	sl.unlock(stamp);
1024	+	},
1025	+	() -> {
1026	+	StampedLock sl = new StampedLock();
1027	+	long stamp = sl.tryConvertToOptimisticRead(sl.writeLock());
1028	+	sl.readLock();
1029	+	sl.unlockRead(stamp);
1030	+	},
1031	+	() -> {
1032	+	StampedLock sl = new StampedLock();
1033	+	long stamp = sl.tryConvertToOptimisticRead(sl.writeLock());
1034	+	sl.readLock();
1035	+	sl.unlock(stamp);
1036	+	},
1037	+
1038	+	() -> {
1039	+	StampedLock sl = new StampedLock();
1040	+	long stamp = sl.tryConvertToOptimisticRead(sl.readLock());
1041	+	assertValid(sl, stamp);
1042	+	sl.writeLock();
1043	+	sl.unlockWrite(stamp);
1044	+	},
1045	+	() -> {
1046	+	StampedLock sl = new StampedLock();
1047	+	long stamp = sl.tryConvertToOptimisticRead(sl.readLock());
1048	+	sl.writeLock();
1049	+	sl.unlock(stamp);
1050	+	},
1051	+	() -> {
1052	+	StampedLock sl = new StampedLock();
1053	+	long stamp = sl.tryConvertToOptimisticRead(sl.readLock());
1054	+	sl.readLock();
1055	+	sl.unlockRead(stamp);
1056	+	},
1057	+	() -> {
1058	+	StampedLock sl = new StampedLock();
1059	+	sl.readLock();
1060	+	long stamp = sl.tryConvertToOptimisticRead(sl.readLock());
1061	+	assertValid(sl, stamp);
1062	+	sl.readLock();
1063	+	sl.unlockRead(stamp);
1064	+	},
1065	+	() -> {
1066	+	StampedLock sl = new StampedLock();
1067	+	long stamp = sl.tryConvertToOptimisticRead(sl.readLock());
1068	+	sl.readLock();
1069	+	sl.unlock(stamp);
1070	+	},
1071	+	() -> {
1072	+	StampedLock sl = new StampedLock();
1073	+	sl.readLock();
1074	+	long stamp = sl.tryConvertToOptimisticRead(sl.readLock());
1075	+	sl.readLock();
1076	+	sl.unlock(stamp);
1077	+	},
1078	+	};
1079	+
1080	+	assertThrows(IllegalMonitorStateException.class, actions);
1081	+	}
1082	+
1083	+	static long writeLockInterruptiblyUninterrupted(StampedLock sl) {
1084	+	try { return sl.writeLockInterruptibly(); }
1085	+	catch (InterruptedException ex) { throw new AssertionError(ex); }
1086	+	}
1087	+
1088	+	static long tryWriteLockUninterrupted(StampedLock sl, long time, TimeUnit unit) {
1089	+	try { return sl.tryWriteLock(time, unit); }
1090	+	catch (InterruptedException ex) { throw new AssertionError(ex); }
1091	+	}
1092	+
1093	+	static long readLockInterruptiblyUninterrupted(StampedLock sl) {
1094	+	try { return sl.readLockInterruptibly(); }
1095	+	catch (InterruptedException ex) { throw new AssertionError(ex); }
1096	+	}
1097	+
1098	+	static long tryReadLockUninterrupted(StampedLock sl, long time, TimeUnit unit) {
1099	+	try { return sl.tryReadLock(time, unit); }
1100	+	catch (InterruptedException ex) { throw new AssertionError(ex); }
1101	+	}
1102	+
1103	+	/**
1104	+	* Invalid stamps result in IllegalMonitorStateException
1105	+	*/
1106	+	public void testInvalidStampsThrowIllegalMonitorStateException() {
1107	+	final StampedLock sl = new StampedLock();
1108	+
1109	+	assertThrows(IllegalMonitorStateException.class,
1110	+	() -> sl.unlockWrite(0L),
1111	+	() -> sl.unlockRead(0L),
1112	+	() -> sl.unlock(0L));
1113	+
1114	+	final long optimisticStamp = sl.tryOptimisticRead();
1115	+	final long readStamp = sl.readLock();
1116	+	sl.unlockRead(readStamp);
1117	+	final long writeStamp = sl.writeLock();
1118	+	sl.unlockWrite(writeStamp);
1119	+	assertTrue(optimisticStamp != 0L && readStamp != 0L && writeStamp != 0L);
1120	+	final long[] noLongerValidStamps = { optimisticStamp, readStamp, writeStamp };
1121	+	final Runnable assertNoLongerValidStampsThrow = () -> {
1122	+	for (long noLongerValidStamp : noLongerValidStamps)
1123	+	assertThrows(IllegalMonitorStateException.class,
1124	+	() -> sl.unlockWrite(noLongerValidStamp),
1125	+	() -> sl.unlockRead(noLongerValidStamp),
1126	+	() -> sl.unlock(noLongerValidStamp));
1127	+	};
1128	+	assertNoLongerValidStampsThrow.run();
1129	+
1130	+	for (Function<StampedLock, Long> readLocker : readLockers())
1131	+	for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers()) {
1132	+	final long stamp = readLocker.apply(sl);
1133	+	assertValid(sl, stamp);
1134	+	assertNoLongerValidStampsThrow.run();
1135	+	assertThrows(IllegalMonitorStateException.class,
1136	+	() -> sl.unlockWrite(stamp),
1137	+	() -> sl.unlockRead(sl.tryOptimisticRead()),
1138	+	() -> sl.unlockRead(0L));
1139	+	readUnlocker.accept(sl, stamp);
1140	+	assertUnlocked(sl);
1141	+	assertNoLongerValidStampsThrow.run();
1142	+	}
1143	+
1144	+	for (Function<StampedLock, Long> writeLocker : writeLockers())
1145	+	for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) {
1146	+	final long stamp = writeLocker.apply(sl);
1147	+	assertValid(sl, stamp);
1148	+	assertNoLongerValidStampsThrow.run();
1149	+	assertThrows(IllegalMonitorStateException.class,
1150	+	() -> sl.unlockRead(stamp),
1151	+	() -> sl.unlockWrite(0L));
1152	+	writeUnlocker.accept(sl, stamp);
1153	+	assertUnlocked(sl);
1154	+	assertNoLongerValidStampsThrow.run();
1155	+	}
1156	+	}
1157	+
1158	+	/**
1159	+	* Read locks can be very deeply nested
1160	+	*/
1161	+	public void testDeeplyNestedReadLocks() {
1162	+	final StampedLock lock = new StampedLock();
1163	+	final int depth = 300;
1164	+	final long[] stamps = new long[depth];
1165	+	final List<Function<StampedLock, Long>> readLockers = readLockers();
1166	+	final List<BiConsumer<StampedLock, Long>> readUnlockers = readUnlockers();
1167	+	for (int i = 0; i < depth; i++) {
1168	+	Function<StampedLock, Long> readLocker
1169	+	= readLockers.get(i % readLockers.size());
1170	+	long stamp = readLocker.apply(lock);
1171	+	assertEquals(i + 1, lock.getReadLockCount());
1172	+	assertTrue(lock.isReadLocked());
1173	+	stamps[i] = stamp;
1174	+	}
1175	+	for (int i = 0; i < depth; i++) {
1176	+	BiConsumer<StampedLock, Long> readUnlocker
1177	+	= readUnlockers.get(i % readUnlockers.size());
1178	+	assertEquals(depth - i, lock.getReadLockCount());
1179	+	assertTrue(lock.isReadLocked());
1180	+	readUnlocker.accept(lock, stamps[depth - 1 - i]);
1181	+	}
1182	+	assertUnlocked(lock);
1183	+	}
1184		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines