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

Comparing jsr166/src/test/tck/LockSupportTest.java (file contents):
Revision 1.10 by jsr166, Mon Nov 16 05:30:08 2009 UTC vs.
Revision 1.24 by jsr166, Wed Dec 31 19:05:43 2014 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5	>	* http://creativecommons.org/publicdomain/zero/1.0/
6		* Other contributors include Andrew Wright, Jeffrey Hayes,
7		* Pat Fisher, Mike Judd.
8		*/
9
10	<	import junit.framework.*;
11	<	import java.util.*;
12	<	import java.util.concurrent.*;
13	<	import java.util.concurrent.locks.*;
10	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
11	>
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.atomic.AtomicBoolean;
14	>	import java.util.concurrent.locks.LockSupport;
15	>
16	>	import junit.framework.Test;
17	>	import junit.framework.TestSuite;
18
19		public class LockSupportTest extends JSR166TestCase {
20		public static void main(String[] args) {
21	<	junit.textui.TestRunner.run (suite());
21	>	junit.textui.TestRunner.run(suite());
22		}
23	+
24		public static Test suite() {
25	<	return new TestSuite(LockSupportTest.class);
25	>	return new TestSuite(LockSupportTest.class);
26		}
27
28		/**
29	<	* park is released by unpark occurring after park
29	>	* Returns the blocker object used by tests in this file.
30	>	* Any old object will do; we'll return a convenient one.
31		*/
32	<	public void testPark() {
33	<	Thread t = new Thread(new Runnable() {
34	<	public void run() {
35	<	try {
36	<	LockSupport.park();
37	<	} catch (Exception e) {
38	<	threadUnexpectedException();
39	<	}
40	<	}
41	<	});
42	<	try {
43	<	t.start();
44	<	Thread.sleep(SHORT_DELAY_MS);
45	<	LockSupport.unpark(t);
46	<	t.join();
47	<	}
48	<	catch (Exception e) {
49	<	unexpectedException();
32	>	static Object theBlocker() {
33	>	return LockSupportTest.class;
34	>	}
35	>
36	>	enum ParkMethod {
37	>	park() {
38	>	void park() {
39	>	LockSupport.park();
40	>	}
41	>	void park(long millis) {
42	>	throw new UnsupportedOperationException();
43	>	}
44	>	},
45	>	parkUntil() {
46	>	void park(long millis) {
47	>	LockSupport.parkUntil(deadline(millis));
48	>	}
49	>	},
50	>	parkNanos() {
51	>	void park(long millis) {
52	>	LockSupport.parkNanos(MILLISECONDS.toNanos(millis));
53	>	}
54	>	},
55	>	parkBlocker() {
56	>	void park() {
57	>	LockSupport.park(theBlocker());
58	>	}
59	>	void park(long millis) {
60	>	throw new UnsupportedOperationException();
61	>	}
62	>	},
63	>	parkUntilBlocker() {
64	>	void park(long millis) {
65	>	LockSupport.parkUntil(theBlocker(), deadline(millis));
66	>	}
67	>	},
68	>	parkNanosBlocker() {
69	>	void park(long millis) {
70	>	LockSupport.parkNanos(theBlocker(),
71	>	MILLISECONDS.toNanos(millis));
72	>	}
73	>	};
74	>
75	>	void park() { park(2 * LONG_DELAY_MS); }
76	>	abstract void park(long millis);
77	>
78	>	/** Returns a deadline to use with parkUntil. */
79	>	long deadline(long millis) {
80	>	// beware of rounding
81	>	return System.currentTimeMillis() + millis + 1;
82		}
83		}
84
85		/**
86	<	* park is released by unpark occurring before park
86	>	* park is released by subsequent unpark
87		*/
88	<	public void testPark2() {
89	<	Thread t = new Thread(new Runnable() {
90	<	public void run() {
91	<	try {
92	<	Thread.sleep(SHORT_DELAY_MS);
93	<	LockSupport.park();
94	<	} catch (Exception e) {
95	<	threadUnexpectedException();
96	<	}
97	<	}
98	<	});
99	<	try {
100	<	t.start();
101	<	LockSupport.unpark(t);
102	<	t.join();
103	<	}
104	<	catch (Exception e) {
105	<	unexpectedException();
106	<	}
88	>	public void testParkBeforeUnpark_park() {
89	>	testParkBeforeUnpark(ParkMethod.park);
90	>	}
91	>	public void testParkBeforeUnpark_parkNanos() {
92	>	testParkBeforeUnpark(ParkMethod.parkNanos);
93	>	}
94	>	public void testParkBeforeUnpark_parkUntil() {
95	>	testParkBeforeUnpark(ParkMethod.parkUntil);
96	>	}
97	>	public void testParkBeforeUnpark_parkBlocker() {
98	>	testParkBeforeUnpark(ParkMethod.parkBlocker);
99	>	}
100	>	public void testParkBeforeUnpark_parkNanosBlocker() {
101	>	testParkBeforeUnpark(ParkMethod.parkNanosBlocker);
102	>	}
103	>	public void testParkBeforeUnpark_parkUntilBlocker() {
104	>	testParkBeforeUnpark(ParkMethod.parkUntilBlocker);
105	>	}
106	>	public void testParkBeforeUnpark(final ParkMethod parkMethod) {
107	>	final CountDownLatch pleaseUnpark = new CountDownLatch(1);
108	>	Thread t = newStartedThread(new CheckedRunnable() {
109	>	public void realRun() {
110	>	pleaseUnpark.countDown();
111	>	parkMethod.park();
112	>	}});
113	>
114	>	await(pleaseUnpark);
115	>	LockSupport.unpark(t);
116	>	awaitTermination(t);
117		}
118
119		/**
120	<	* park is released by interrupt
120	>	* park is released by preceding unpark
121		*/
122	<	public void testPark3() {
123	<	Thread t = new Thread(new Runnable() {
124	<	public void run() {
125	<	try {
126	<	LockSupport.park();
127	<	} catch (Exception e) {
128	<	threadUnexpectedException();
129	<	}
130	<	}
131	<	});
132	<	try {
133	<	t.start();
134	<	Thread.sleep(SHORT_DELAY_MS);
135	<	t.interrupt();
136	<	t.join();
137	<	}
138	<	catch (Exception e) {
139	<	unexpectedException();
140	<	}
122	>	public void testParkAfterUnpark_park() {
123	>	testParkAfterUnpark(ParkMethod.park);
124	>	}
125	>	public void testParkAfterUnpark_parkNanos() {
126	>	testParkAfterUnpark(ParkMethod.parkNanos);
127	>	}
128	>	public void testParkAfterUnpark_parkUntil() {
129	>	testParkAfterUnpark(ParkMethod.parkUntil);
130	>	}
131	>	public void testParkAfterUnpark_parkBlocker() {
132	>	testParkAfterUnpark(ParkMethod.parkBlocker);
133	>	}
134	>	public void testParkAfterUnpark_parkNanosBlocker() {
135	>	testParkAfterUnpark(ParkMethod.parkNanosBlocker);
136	>	}
137	>	public void testParkAfterUnpark_parkUntilBlocker() {
138	>	testParkAfterUnpark(ParkMethod.parkUntilBlocker);
139	>	}
140	>	public void testParkAfterUnpark(final ParkMethod parkMethod) {
141	>	final CountDownLatch pleaseUnpark = new CountDownLatch(1);
142	>	final AtomicBoolean pleasePark = new AtomicBoolean(false);
143	>	Thread t = newStartedThread(new CheckedRunnable() {
144	>	public void realRun() {
145	>	pleaseUnpark.countDown();
146	>	while (!pleasePark.get())
147	>	Thread.yield();
148	>	parkMethod.park();
149	>	}});
150	>
151	>	await(pleaseUnpark);
152	>	LockSupport.unpark(t);
153	>	pleasePark.set(true);
154	>	awaitTermination(t);
155		}
156
157		/**
158	<	* park returns if interrupted before park
158	>	* park is released by subsequent interrupt
159		*/
160	<	public void testPark4() {
161	<	final ReentrantLock lock = new ReentrantLock();
162	<	lock.lock();
163	<	Thread t = new Thread(new Runnable() {
164	<	public void run() {
165	<	try {
166	<	lock.lock();
167	<	LockSupport.park();
168	<	} catch (Exception e) {
169	<	threadUnexpectedException();
170	<	}
171	<	}
172	<	});
173	<	try {
174	<	t.start();
175	<	t.interrupt();
176	<	lock.unlock();
177	<	t.join();
178	<	}
179	<	catch (Exception e) {
180	<	unexpectedException();
181	<	}
160	>	public void testParkBeforeInterrupt_park() {
161	>	testParkBeforeInterrupt(ParkMethod.park);
162	>	}
163	>	public void testParkBeforeInterrupt_parkNanos() {
164	>	testParkBeforeInterrupt(ParkMethod.parkNanos);
165	>	}
166	>	public void testParkBeforeInterrupt_parkUntil() {
167	>	testParkBeforeInterrupt(ParkMethod.parkUntil);
168	>	}
169	>	public void testParkBeforeInterrupt_parkBlocker() {
170	>	testParkBeforeInterrupt(ParkMethod.parkBlocker);
171	>	}
172	>	public void testParkBeforeInterrupt_parkNanosBlocker() {
173	>	testParkBeforeInterrupt(ParkMethod.parkNanosBlocker);
174	>	}
175	>	public void testParkBeforeInterrupt_parkUntilBlocker() {
176	>	testParkBeforeInterrupt(ParkMethod.parkUntilBlocker);
177	>	}
178	>	public void testParkBeforeInterrupt(final ParkMethod parkMethod) {
179	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
180	>	Thread t = newStartedThread(new CheckedRunnable() {
181	>	public void realRun() {
182	>	pleaseInterrupt.countDown();
183	>	do {
184	>	parkMethod.park();
185	>	// park may return spuriously
186	>	} while (! Thread.currentThread().isInterrupted());
187	>	}});
188	>
189	>	await(pleaseInterrupt);
190	>	assertThreadStaysAlive(t);
191	>	t.interrupt();
192	>	awaitTermination(t);
193		}
194
195		/**
196	<	* parkNanos times out if not unparked
196	>	* park is released by preceding interrupt
197		*/
198	<	public void testParkNanos() {
199	<	Thread t = new Thread(new Runnable() {
200	<	public void run() {
201	<	try {
202	<	LockSupport.parkNanos(1000);
203	<	} catch (Exception e) {
204	<	threadUnexpectedException();
205	<	}
206	<	}
207	<	});
208	<	try {
209	<	t.start();
210	<	t.join();
211	<	}
212	<	catch (Exception e) {
213	<	unexpectedException();
214	<	}
198	>	public void testParkAfterInterrupt_park() {
199	>	testParkAfterInterrupt(ParkMethod.park);
200	>	}
201	>	public void testParkAfterInterrupt_parkNanos() {
202	>	testParkAfterInterrupt(ParkMethod.parkNanos);
203	>	}
204	>	public void testParkAfterInterrupt_parkUntil() {
205	>	testParkAfterInterrupt(ParkMethod.parkUntil);
206	>	}
207	>	public void testParkAfterInterrupt_parkBlocker() {
208	>	testParkAfterInterrupt(ParkMethod.parkBlocker);
209	>	}
210	>	public void testParkAfterInterrupt_parkNanosBlocker() {
211	>	testParkAfterInterrupt(ParkMethod.parkNanosBlocker);
212	>	}
213	>	public void testParkAfterInterrupt_parkUntilBlocker() {
214	>	testParkAfterInterrupt(ParkMethod.parkUntilBlocker);
215		}
216	+	public void testParkAfterInterrupt(final ParkMethod parkMethod) {
217	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
218	+	final AtomicBoolean pleasePark = new AtomicBoolean(false);
219	+	Thread t = newStartedThread(new CheckedRunnable() {
220	+	public void realRun() throws Exception {
221	+	pleaseInterrupt.countDown();
222	+	while (!pleasePark.get())
223	+	Thread.yield();
224	+	assertTrue(Thread.currentThread().isInterrupted());
225	+	parkMethod.park();
226	+	assertTrue(Thread.currentThread().isInterrupted());
227	+	}});
228
229	+	await(pleaseInterrupt);
230	+	t.interrupt();
231	+	pleasePark.set(true);
232	+	awaitTermination(t);
233	+	}
234	+
235	+	/**
236	+	* timed park times out if not unparked
237	+	*/
238	+	public void testParkTimesOut_parkNanos() {
239	+	testParkTimesOut(ParkMethod.parkNanos);
240	+	}
241	+	public void testParkTimesOut_parkUntil() {
242	+	testParkTimesOut(ParkMethod.parkUntil);
243	+	}
244	+	public void testParkTimesOut_parkNanosBlocker() {
245	+	testParkTimesOut(ParkMethod.parkNanosBlocker);
246	+	}
247	+	public void testParkTimesOut_parkUntilBlocker() {
248	+	testParkTimesOut(ParkMethod.parkUntilBlocker);
249	+	}
250	+	public void testParkTimesOut(final ParkMethod parkMethod) {
251	+	Thread t = newStartedThread(new CheckedRunnable() {
252	+	public void realRun() {
253	+	for (;;) {
254	+	long startTime = System.nanoTime();
255	+	parkMethod.park(timeoutMillis());
256	+	// park may return spuriously
257	+	if (millisElapsedSince(startTime) >= timeoutMillis())
258	+	return;
259	+	}
260	+	}});
261	+
262	+	awaitTermination(t);
263	+	}
264	+
265	+	/**
266	+	* getBlocker(null) throws NullPointerException
267	+	*/
268	+	public void testGetBlockerNull() {
269	+	try {
270	+	LockSupport.getBlocker(null);
271	+	shouldThrow();
272	+	} catch (NullPointerException success) {}
273	+	}
274
275		/**
276	<	* parkUntil times out if not unparked
276	>	* getBlocker returns the blocker object passed to park
277		*/
278	<	public void testParkUntil() {
279	<	Thread t = new Thread(new Runnable() {
280	<	public void run() {
281	<	try {
282	<	long d = new Date().getTime() + 100;
283	<	LockSupport.parkUntil(d);
284	<	} catch (Exception e) {
285	<	threadUnexpectedException();
286	<	}
287	<	}
288	<	});
289	<	try {
290	<	t.start();
291	<	t.join();
292	<	}
293	<	catch (Exception e) {
294	<	unexpectedException();
278	>	public void testGetBlocker_parkBlocker() {
279	>	testGetBlocker(ParkMethod.parkBlocker);
280	>	}
281	>	public void testGetBlocker_parkNanosBlocker() {
282	>	testGetBlocker(ParkMethod.parkNanosBlocker);
283	>	}
284	>	public void testGetBlocker_parkUntilBlocker() {
285	>	testGetBlocker(ParkMethod.parkUntilBlocker);
286	>	}
287	>	public void testGetBlocker(final ParkMethod parkMethod) {
288	>	final CountDownLatch started = new CountDownLatch(1);
289	>	Thread t = newStartedThread(new CheckedRunnable() {
290	>	public void realRun() {
291	>	Thread t = Thread.currentThread();
292	>	started.countDown();
293	>	do {
294	>	assertNull(LockSupport.getBlocker(t));
295	>	parkMethod.park();
296	>	assertNull(LockSupport.getBlocker(t));
297	>	// park may return spuriously
298	>	} while (! Thread.currentThread().isInterrupted());
299	>	}});
300	>
301	>	long startTime = System.nanoTime();
302	>	await(started);
303	>	for (;;) {
304	>	Object x = LockSupport.getBlocker(t);
305	>	if (x == theBlocker()) { // success
306	>	t.interrupt();
307	>	awaitTermination(t);
308	>	assertNull(LockSupport.getBlocker(t));
309	>	return;
310	>	} else {
311	>	assertNull(x);  // ok
312	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
313	>	fail("timed out");
314	>	Thread.yield();
315	>	}
316		}
317		}
318	+
319	+	/**
320	+	* timed park(0) returns immediately.
321	+	*
322	+	* Requires hotspot fix for:
323	+	* 6763959 java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
324	+	* which is in jdk7-b118 and 6u25.
325	+	*/
326	+	public void testPark0_parkNanos() {
327	+	testPark0(ParkMethod.parkNanos);
328	+	}
329	+	public void testPark0_parkUntil() {
330	+	testPark0(ParkMethod.parkUntil);
331	+	}
332	+	public void testPark0_parkNanosBlocker() {
333	+	testPark0(ParkMethod.parkNanosBlocker);
334	+	}
335	+	public void testPark0_parkUntilBlocker() {
336	+	testPark0(ParkMethod.parkUntilBlocker);
337	+	}
338	+	public void testPark0(final ParkMethod parkMethod) {
339	+	Thread t = newStartedThread(new CheckedRunnable() {
340	+	public void realRun() {
341	+	parkMethod.park(0L);
342	+	}});
343	+
344	+	awaitTermination(t);
345	+	}
346	+
347	+	/**
348	+	* timed park(Long.MIN_VALUE) returns immediately.
349	+	*/
350	+	public void testParkNeg_parkNanos() {
351	+	testParkNeg(ParkMethod.parkNanos);
352	+	}
353	+	public void testParkNeg_parkUntil() {
354	+	testParkNeg(ParkMethod.parkUntil);
355	+	}
356	+	public void testParkNeg_parkNanosBlocker() {
357	+	testParkNeg(ParkMethod.parkNanosBlocker);
358	+	}
359	+	public void testParkNeg_parkUntilBlocker() {
360	+	testParkNeg(ParkMethod.parkUntilBlocker);
361	+	}
362	+	public void testParkNeg(final ParkMethod parkMethod) {
363	+	Thread t = newStartedThread(new CheckedRunnable() {
364	+	public void realRun() {
365	+	parkMethod.park(Long.MIN_VALUE);
366	+	}});
367	+
368	+	awaitTermination(t);
369	+	}
370		}

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