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

Comparing jsr166/src/test/tck/LockSupportTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 2003 UTC vs.
Revision 1.19 by dl, Fri May 6 11:22:07 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 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.atomic.AtomicBoolean;
14		import java.util.concurrent.locks.*;
15
16	<	public class LockSupportTest extends TestCase{
14	<
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		}
18	–
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	>	delay(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	>	delay(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	>	delay(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	>	do {
160	>	LockSupport.park();
161	>	// park may return spuriously
162	>	} while (! Thread.currentThread().isInterrupted());
163	>	}});
164	>
165	>	threadStarted.await();
166	>	delay(SHORT_DELAY_MS);
167	>	t.interrupt();
168	>	awaitTermination(t, MEDIUM_DELAY_MS);
169	>	}
170	>
171	>	/**
172	>	* parkUntil is released by subsequent interrupt
173	>	*/
174	>	public void testParkUntilBeforeInterrupt() throws InterruptedException {
175	>	final CountDownLatch threadStarted = new CountDownLatch(1);
176	>	Thread t = newStartedThread(new CheckedRunnable() {
177	>	public void realRun() {
178	>	long d = new Date().getTime() + LONG_DELAY_MS;
179	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
180	>	long t0 = System.nanoTime();
181	>	assertFalse(Thread.currentThread().isInterrupted());
182	>	threadStarted.countDown();
183	>	do {
184	>	LockSupport.parkUntil(d);
185	>	// parkUntil may return spuriously
186	>	} while (! Thread.currentThread().isInterrupted());
187	>	assertTrue(System.nanoTime() - t0 < nanos);
188	>	}});
189	>
190	>	threadStarted.await();
191	>	delay(SHORT_DELAY_MS);
192	>	t.interrupt();
193	>	awaitTermination(t, MEDIUM_DELAY_MS);
194	>	}
195	>
196	>	/**
197	>	* parkNanos is released by subsequent interrupt
198	>	*/
199	>	public void testParkNanosBeforeInterrupt() throws InterruptedException {
200	>	final CountDownLatch threadStarted = new CountDownLatch(1);
201	>	Thread t = newStartedThread(new CheckedRunnable() {
202	>	public void realRun() {
203	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
204	>	long t0 = System.nanoTime();
205	>	assertFalse(Thread.currentThread().isInterrupted());
206	>	threadStarted.countDown();
207	>	do {
208	>	LockSupport.parkNanos(nanos);
209	>	// parkNanos may return spuriously
210	>	} while (! Thread.currentThread().isInterrupted());
211	>	assertTrue(System.nanoTime() - t0 < nanos);
212	>	}});
213	>
214	>	threadStarted.await();
215	>	delay(SHORT_DELAY_MS);
216	>	t.interrupt();
217	>	awaitTermination(t, MEDIUM_DELAY_MS);
218	>	}
219	>
220	>	/**
221	>	* park is released by preceding interrupt
222	>	*/
223	>	public void testParkAfterInterrupt() throws Exception {
224	>	final CountDownLatch threadStarted = new CountDownLatch(1);
225	>	final AtomicBoolean unparked = new AtomicBoolean(false);
226	>	Thread t = newStartedThread(new CheckedRunnable() {
227	>	public void realRun() throws Exception {
228	>	threadStarted.countDown();
229	>	while (!unparked.get())
230	>	Thread.yield();
231	>	assertTrue(Thread.currentThread().isInterrupted());
232	>	LockSupport.park();
233	>	assertTrue(Thread.currentThread().isInterrupted());
234	>	}});
235	>
236	>	threadStarted.await();
237	>	t.interrupt();
238	>	unparked.set(true);
239	>	awaitTermination(t, MEDIUM_DELAY_MS);
240	>	}
241	>
242	>	/**
243	>	* parkUntil is released by preceding interrupt
244	>	*/
245	>	public void testParkUntilAfterInterrupt() throws Exception {
246	>	final CountDownLatch threadStarted = new CountDownLatch(1);
247	>	final AtomicBoolean unparked = new AtomicBoolean(false);
248	>	Thread t = newStartedThread(new CheckedRunnable() {
249	>	public void realRun() throws Exception {
250	>	threadStarted.countDown();
251	>	while (!unparked.get())
252	>	Thread.yield();
253	>	long d = new Date().getTime() + LONG_DELAY_MS;
254	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
255	>	long t0 = System.nanoTime();
256	>	assertTrue(Thread.currentThread().isInterrupted());
257	>	LockSupport.parkUntil(d);
258	>	assertTrue(System.nanoTime() - t0 < nanos);
259	>	assertTrue(Thread.currentThread().isInterrupted());
260	>	}});
261	>
262	>	threadStarted.await();
263	>	t.interrupt();
264	>	unparked.set(true);
265	>	awaitTermination(t, MEDIUM_DELAY_MS);
266	>	}
267	>
268	>	/**
269	>	* parkNanos is released by preceding interrupt
270	>	*/
271	>	public void testParkNanosAfterInterrupt() throws Exception {
272	>	final CountDownLatch threadStarted = new CountDownLatch(1);
273	>	final AtomicBoolean unparked = new AtomicBoolean(false);
274	>	Thread t = newStartedThread(new CheckedRunnable() {
275	>	public void realRun() throws Exception {
276	>	threadStarted.countDown();
277	>	while (!unparked.get())
278	>	Thread.yield();
279	>	long nanos = LONG_DELAY_MS * 1000L * 1000L;
280	>	long t0 = System.nanoTime();
281	>	assertTrue(Thread.currentThread().isInterrupted());
282	>	LockSupport.parkNanos(nanos);
283	>	assertTrue(System.nanoTime() - t0 < nanos);
284	>	assertTrue(Thread.currentThread().isInterrupted());
285	>	}});
286	>
287	>	threadStarted.await();
288	>	t.interrupt();
289	>	unparked.set(true);
290	>	awaitTermination(t, MEDIUM_DELAY_MS);
291		}
292
293	<	public void testUnpark() {
294	<	Thread t = new Thread(new Runnable(){
295	<	public void run(){
296	<	try{
297	<	LockSupport.park();
298	<	}catch(Exception e){
299	<	fail("unexpected exception");
300	<	}
301	<	}
302	<	});
303	<	t.start();
304	<	try{
305	<	LockSupport.unpark(t);
306	<	t.join();
307	<	}
308	<	catch(Exception e) {
309	<	fail("unexpected exception");
41	<	}
42	<	}
43	<
44	<	public void testParkNanos() {
45	<	Thread t = new Thread(new Runnable(){
46	<	public void run(){
47	<	try{
48	<	LockSupport.parkNanos(1000);
49	<	}catch(Exception e){
50	<	fail("unexpected exception");
51	<	}
52	<	}
53	<	});
54	<	try{
55	<	t.start();
56	<	t.join();
57	<	}
58	<	catch(Exception e) {
59	<	fail("unexpected exception");
60	<	}
293	>	/**
294	>	* parkNanos times out if not unparked
295	>	*/
296	>	public void testParkNanosTimesOut() throws InterruptedException {
297	>	Thread t = newStartedThread(new CheckedRunnable() {
298	>	public void realRun() {
299	>	for (;;) {
300	>	long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
301	>	long t0 = System.nanoTime();
302	>	LockSupport.parkNanos(timeoutNanos);
303	>	// parkNanos may return spuriously
304	>	if (System.nanoTime() - t0 >= timeoutNanos)
305	>	return;
306	>	}
307	>	}});
308	>
309	>	awaitTermination(t, MEDIUM_DELAY_MS);
310		}
311
312
313	<	public void testParkUntil() {
314	<	Thread t = new Thread(new Runnable(){
315	<	public void run(){
316	<	try{
317	<	long d = new Date().getTime() + 100;
318	<	LockSupport.parkUntil(d);
319	<	}catch(Exception e){
320	<	fail("unexpected exception");
321	<	}
322	<	}
323	<	});
324	<	try{
325	<	t.start();
326	<	t.join();
327	<	}
328	<	catch(Exception e) {
329	<	fail("unexpected exception");
330	<	}
313	>	/**
314	>	* parkUntil times out if not unparked
315	>	*/
316	>	public void testParkUntilTimesOut() throws InterruptedException {
317	>	Thread t = newStartedThread(new CheckedRunnable() {
318	>	public void realRun() {
319	>	for (;;) {
320	>	long d = new Date().getTime() + SHORT_DELAY_MS;
321	>	// beware of rounding
322	>	long timeoutNanos = (SHORT_DELAY_MS - 1) * 1000L * 1000L;
323	>	long t0 = System.nanoTime();
324	>	LockSupport.parkUntil(d);
325	>	// parkUntil may return spuriously
326	>	if (System.nanoTime() - t0 >= timeoutNanos)
327	>	return;
328	>	}
329	>	}});
330	>
331	>	awaitTermination(t, MEDIUM_DELAY_MS);
332		}
333
334	+	/**
335	+	* parkUntil(0) returns immediately
336	+	* Requires hotspot fix for:
337	+	* 6763959 java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
338	+	*/
339	+	public void XXXXtestParkUntil0Returns() throws InterruptedException {
340	+	Thread t = newStartedThread(new CheckedRunnable() {
341	+	public void realRun() {
342	+	LockSupport.parkUntil(0L);
343	+	}});
344
345	+	awaitTermination(t, MEDIUM_DELAY_MS);
346	+	}
347		}

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