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

Comparing jsr166/src/test/tck/LockSupportTest.java (file contents):
Revision 1.7 by dl, Wed Jul 12 12:59:04 2006 UTC vs.
Revision 1.16 by jsr166, Wed Oct 6 04:05:42 2010 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
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/licenses/publicdomain
6	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
7	<	* Pat Fisher, Mike Judd.
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.atomic.AtomicBoolean;
14		import java.util.concurrent.locks.*;
15
16	<	public class LockSupportTest extends JSR166TestCase{
16	>	public class LockSupportTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20	+
21		public static Test suite() {
22	<	return new TestSuite(LockSupportTest.class);
22	>	return new TestSuite(LockSupportTest.class);
23	>	}
24	>
25	>	/**
26	>	* park is released by subsequent unpark
27	>	*/
28	>	public void testParkBeforeUnpark() throws InterruptedException {
29	>	final CountDownLatch threadStarted = new CountDownLatch(1);
30	>	Thread t = newStartedThread(new CheckedRunnable() {
31	>	public void realRun() {
32	>	threadStarted.countDown();
33	>	LockSupport.park();
34	>	}});
35	>
36	>	threadStarted.await();
37	>	Thread.sleep(SHORT_DELAY_MS);
38	>	LockSupport.unpark(t);
39	>	awaitTermination(t, MEDIUM_DELAY_MS);
40	>	}
41	>
42	>	/**
43	>	* parkUntil is released by subsequent unpark
44	>	*/
45	>	public void testParkUntilBeforeUnpark() throws InterruptedException {
46	>	final CountDownLatch threadStarted = new CountDownLatch(1);
47	>	Thread t = newStartedThread(new CheckedRunnable() {
48	>	public void realRun() {
49	>	long d = new Date().getTime() + LONG_DELAY_MS;
50	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
51	>	long t0 = System.nanoTime();
52	>	threadStarted.countDown();
53	>	LockSupport.parkUntil(d);
54	>	assertTrue(System.nanoTime() - t0 < nanos);
55	>	}});
56	>
57	>	threadStarted.await();
58	>	Thread.sleep(SHORT_DELAY_MS);
59	>	LockSupport.unpark(t);
60	>	awaitTermination(t, MEDIUM_DELAY_MS);
61	>	}
62	>
63	>	/**
64	>	* parkNanos is released by subsequent unpark
65	>	*/
66	>	public void testParkNanosBeforeUnpark() throws InterruptedException {
67	>	final CountDownLatch threadStarted = new CountDownLatch(1);
68	>	Thread t = newStartedThread(new CheckedRunnable() {
69	>	public void realRun() {
70	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
71	>	long t0 = System.nanoTime();
72	>	threadStarted.countDown();
73	>	LockSupport.parkNanos(nanos);
74	>	assertTrue(System.nanoTime() - t0 < nanos);
75	>	}});
76	>
77	>	threadStarted.await();
78	>	Thread.sleep(SHORT_DELAY_MS);
79	>	LockSupport.unpark(t);
80	>	awaitTermination(t, MEDIUM_DELAY_MS);
81	>	}
82	>
83	>	/**
84	>	* park is released by preceding unpark
85	>	*/
86	>	public void testParkAfterUnpark() throws Exception {
87	>	final CountDownLatch threadStarted = new CountDownLatch(1);
88	>	final AtomicBoolean unparked = new AtomicBoolean(false);
89	>	Thread t = newStartedThread(new CheckedRunnable() {
90	>	public void realRun() throws Exception {
91	>	threadStarted.countDown();
92	>	while (!unparked.get())
93	>	Thread.yield();
94	>	LockSupport.park();
95	>	}});
96	>
97	>	threadStarted.await();
98	>	LockSupport.unpark(t);
99	>	unparked.set(true);
100	>	awaitTermination(t, MEDIUM_DELAY_MS);
101	>	}
102	>
103	>	/**
104	>	* parkUntil is released by preceding unpark
105	>	*/
106	>	public void testParkUntilAfterUnpark() throws Exception {
107	>	final CountDownLatch threadStarted = new CountDownLatch(1);
108	>	final AtomicBoolean unparked = new AtomicBoolean(false);
109	>	Thread t = newStartedThread(new CheckedRunnable() {
110	>	public void realRun() throws Exception {
111	>	threadStarted.countDown();
112	>	while (!unparked.get())
113	>	Thread.yield();
114	>	long d = new Date().getTime() + LONG_DELAY_MS;
115	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
116	>	long t0 = System.nanoTime();
117	>	LockSupport.parkUntil(d);
118	>	assertTrue(System.nanoTime() - t0 < nanos);
119	>	}});
120	>
121	>	threadStarted.await();
122	>	LockSupport.unpark(t);
123	>	unparked.set(true);
124	>	awaitTermination(t, MEDIUM_DELAY_MS);
125	>	}
126	>
127	>	/**
128	>	* parkNanos is released by preceding unpark
129	>	*/
130	>	public void testParkNanosAfterUnpark() throws Exception {
131	>	final CountDownLatch threadStarted = new CountDownLatch(1);
132	>	final AtomicBoolean unparked = new AtomicBoolean(false);
133	>	Thread t = newStartedThread(new CheckedRunnable() {
134	>	public void realRun() throws Exception {
135	>	threadStarted.countDown();
136	>	while (!unparked.get())
137	>	Thread.yield();
138	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
139	>	long t0 = System.nanoTime();
140	>	LockSupport.parkNanos(nanos);
141	>	assertTrue(System.nanoTime() - t0 < nanos);
142	>	}});
143	>
144	>	threadStarted.await();
145	>	LockSupport.unpark(t);
146	>	unparked.set(true);
147	>	awaitTermination(t, MEDIUM_DELAY_MS);
148	>	}
149	>
150	>	/**
151	>	* park is released by subsequent interrupt
152	>	*/
153	>	public void testParkBeforeInterrupt() throws InterruptedException {
154	>	final CountDownLatch threadStarted = new CountDownLatch(1);
155	>	Thread t = newStartedThread(new CheckedRunnable() {
156	>	public void realRun() {
157	>	assertFalse(Thread.currentThread().isInterrupted());
158	>	threadStarted.countDown();
159	>	LockSupport.park();
160	>	assertTrue(Thread.currentThread().isInterrupted());
161	>	}});
162	>
163	>	threadStarted.await();
164	>	Thread.sleep(SHORT_DELAY_MS);
165	>	t.interrupt();
166	>	awaitTermination(t, MEDIUM_DELAY_MS);
167	>	}
168	>
169	>	/**
170	>	* parkUntil is released by subsequent interrupt
171	>	*/
172	>	public void testParkUntilBeforeInterrupt() throws InterruptedException {
173	>	final CountDownLatch threadStarted = new CountDownLatch(1);
174	>	Thread t = newStartedThread(new CheckedRunnable() {
175	>	public void realRun() {
176	>	long d = new Date().getTime() + LONG_DELAY_MS;
177	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
178	>	long t0 = System.nanoTime();
179	>	threadStarted.countDown();
180	>	LockSupport.parkUntil(d);
181	>	assertTrue(System.nanoTime() - t0 < nanos);
182	>	}});
183	>
184	>	threadStarted.await();
185	>	Thread.sleep(SHORT_DELAY_MS);
186	>	t.interrupt();
187	>	awaitTermination(t, MEDIUM_DELAY_MS);
188	>	}
189	>
190	>	/**
191	>	* parkNanos is released by subsequent interrupt
192	>	*/
193	>	public void testParkNanosBeforeInterrupt() throws InterruptedException {
194	>	final CountDownLatch threadStarted = new CountDownLatch(1);
195	>	Thread t = newStartedThread(new CheckedRunnable() {
196	>	public void realRun() {
197	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
198	>	long t0 = System.nanoTime();
199	>	threadStarted.countDown();
200	>	LockSupport.parkNanos(nanos);
201	>	assertTrue(System.nanoTime() - t0 < nanos);
202	>	}});
203	>
204	>	threadStarted.await();
205	>	Thread.sleep(SHORT_DELAY_MS);
206	>	t.interrupt();
207	>	awaitTermination(t, MEDIUM_DELAY_MS);
208	>	}
209	>
210	>	/**
211	>	* park is released by preceding interrupt
212	>	*/
213	>	public void testParkAfterInterrupt() throws Exception {
214	>	final CountDownLatch threadStarted = new CountDownLatch(1);
215	>	final AtomicBoolean unparked = new AtomicBoolean(false);
216	>	Thread t = newStartedThread(new CheckedRunnable() {
217	>	public void realRun() throws Exception {
218	>	threadStarted.countDown();
219	>	while (!unparked.get())
220	>	Thread.yield();
221	>	assertTrue(Thread.currentThread().isInterrupted());
222	>	LockSupport.park();
223	>	assertTrue(Thread.currentThread().isInterrupted());
224	>	}});
225	>
226	>	threadStarted.await();
227	>	t.interrupt();
228	>	unparked.set(true);
229	>	awaitTermination(t, MEDIUM_DELAY_MS);
230	>	}
231	>
232	>	/**
233	>	* parkUntil is released by preceding interrupt
234	>	*/
235	>	public void testParkUntilAfterInterrupt() throws Exception {
236	>	final CountDownLatch threadStarted = new CountDownLatch(1);
237	>	final AtomicBoolean unparked = new AtomicBoolean(false);
238	>	Thread t = newStartedThread(new CheckedRunnable() {
239	>	public void realRun() throws Exception {
240	>	threadStarted.countDown();
241	>	while (!unparked.get())
242	>	Thread.yield();
243	>	long d = new Date().getTime() + LONG_DELAY_MS;
244	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
245	>	long t0 = System.nanoTime();
246	>	LockSupport.parkUntil(d);
247	>	assertTrue(System.nanoTime() - t0 < nanos);
248	>	}});
249	>
250	>	threadStarted.await();
251	>	t.interrupt();
252	>	unparked.set(true);
253	>	awaitTermination(t, MEDIUM_DELAY_MS);
254		}
255
256		/**
257	<	* park is released by unpark occurring after park
257	>	* parkNanos is released by preceding interrupt
258		*/
259	<	public void testPark() {
260	<	Thread t = new Thread(new Runnable() {
261	<	public void run() {
262	<	try {
263	<	LockSupport.park();
264	<	} catch(Exception e){
265	<	threadUnexpectedException();
266	<	}
267	<	}
268	<	});
269	<	try {
270	<	t.start();
271	<	Thread.sleep(SHORT_DELAY_MS);
272	<	LockSupport.unpark(t);
273	<	t.join();
274	<	}
275	<	catch(Exception e) {
276	<	unexpectedException();
43	<	}
44	<	}
45	<
46	<	/**
47	<	* park is released by unpark occurring before park
48	<	*/
49	<	public void testPark2() {
50	<	Thread t = new Thread(new Runnable() {
51	<	public void run() {
52	<	try {
53	<	Thread.sleep(SHORT_DELAY_MS);
54	<	LockSupport.park();
55	<	} catch(Exception e){
56	<	threadUnexpectedException();
57	<	}
58	<	}
59	<	});
60	<	try {
61	<	t.start();
62	<	LockSupport.unpark(t);
63	<	t.join();
64	<	}
65	<	catch(Exception e) {
66	<	unexpectedException();
67	<	}
68	<	}
69	<
70	<	/**
71	<	* park is released by interrupt
72	<	*/
73	<	public void testPark3() {
74	<	Thread t = new Thread(new Runnable() {
75	<	public void run() {
76	<	try {
77	<	LockSupport.park();
78	<	} catch(Exception e){
79	<	threadUnexpectedException();
80	<	}
81	<	}
82	<	});
83	<	try {
84	<	t.start();
85	<	Thread.sleep(SHORT_DELAY_MS);
86	<	t.interrupt();
87	<	t.join();
88	<	}
89	<	catch(Exception e) {
90	<	unexpectedException();
91	<	}
92	<	}
93	<
94	<	/**
95	<	* park returns if interrupted before park
96	<	*/
97	<	public void testPark4() {
98	<	final ReentrantLock lock = new ReentrantLock();
99	<	lock.lock();
100	<	Thread t = new Thread(new Runnable() {
101	<	public void run() {
102	<	try {
103	<	lock.lock();
104	<	LockSupport.park();
105	<	} catch(Exception e){
106	<	threadUnexpectedException();
107	<	}
108	<	}
109	<	});
110	<	try {
111	<	t.start();
112	<	t.interrupt();
113	<	lock.unlock();
114	<	t.join();
115	<	}
116	<	catch(Exception e) {
117	<	unexpectedException();
118	<	}
259	>	public void testParkNanosAfterInterrupt() throws Exception {
260	>	final CountDownLatch threadStarted = new CountDownLatch(1);
261	>	final AtomicBoolean unparked = new AtomicBoolean(false);
262	>	Thread t = newStartedThread(new CheckedRunnable() {
263	>	public void realRun() throws Exception {
264	>	threadStarted.countDown();
265	>	while (!unparked.get())
266	>	Thread.yield();
267	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
268	>	long t0 = System.nanoTime();
269	>	LockSupport.parkNanos(nanos);
270	>	assertTrue(System.nanoTime() - t0 < nanos);
271	>	}});
272	>
273	>	threadStarted.await();
274	>	t.interrupt();
275	>	unparked.set(true);
276	>	awaitTermination(t, MEDIUM_DELAY_MS);
277		}
278
279		/**
280		* parkNanos times out if not unparked
281		*/
282	<	public void testParkNanos() {
283	<	Thread t = new Thread(new Runnable() {
284	<	public void run() {
285	<	try {
286	<	LockSupport.parkNanos(1000);
287	<	} catch(Exception e){
288	<	threadUnexpectedException();
289	<	}
290	<	}
291	<	});
134	<	try {
135	<	t.start();
136	<	t.join();
137	<	}
138	<	catch(Exception e) {
139	<	unexpectedException();
140	<	}
282	>	public void testParkNanosTimesOut() throws InterruptedException {
283	>	Thread t = newStartedThread(new CheckedRunnable() {
284	>	public void realRun() {
285	>	final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
286	>	long t0 = System.nanoTime();
287	>	LockSupport.parkNanos(timeoutNanos);
288	>	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
289	>	}});
290	>
291	>	awaitTermination(t, MEDIUM_DELAY_MS);
292		}
293
294
295		/**
296		* parkUntil times out if not unparked
297		*/
298	<	public void testParkUntil() {
299	<	Thread t = new Thread(new Runnable() {
300	<	public void run() {
301	<	try {
302	<	long d = new Date().getTime() + 100;
303	<	LockSupport.parkUntil(d);
304	<	} catch(Exception e){
305	<	threadUnexpectedException();
306	<	}
307	<	}
308	<	});
309	<	try {
310	<	t.start();
311	<	t.join();
312	<	}
313	<	catch(Exception e) {
314	<	unexpectedException();
315	<	}
298	>	public void testParkUntilTimesOut() throws InterruptedException {
299	>	Thread t = newStartedThread(new CheckedRunnable() {
300	>	public void realRun() {
301	>	long d = new Date().getTime() + SHORT_DELAY_MS;
302	>	// beware of rounding
303	>	long timeoutNanos = (SHORT_DELAY_MS - 1) * 1000L * 1000L;
304	>	long t0 = System.nanoTime();
305	>	LockSupport.parkUntil(d);
306	>	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
307	>	}});
308	>
309	>	awaitTermination(t, MEDIUM_DELAY_MS);
310	>	}
311	>
312	>	/**
313	>	* parkUntil(0) returns immediately
314	>	* Requires hotspot fix for:
315	>	* 6763959 java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
316	>	*/
317	>	public void XXXXtestParkUntil0Returns() throws InterruptedException {
318	>	Thread t = newStartedThread(new CheckedRunnable() {
319	>	public void realRun() {
320	>	LockSupport.parkUntil(0L);
321	>	}});
322	>
323	>	awaitTermination(t, MEDIUM_DELAY_MS);
324		}
325		}

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