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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 1.16 by jsr166, Wed Oct 6 04:05:42 2010 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/licenses/publicdomain
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	>	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	>	* parkNanos is released by preceding interrupt
258	>	*/
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	<	public void testUnpark() {
280	<	Thread t = new Thread(new Runnable(){
281	<	public void run(){
282	<	try{
283	<	LockSupport.park();
284	<	}catch(Exception e){
285	<	fail("unexpected exception");
286	<	}
287	<	}
288	<	});
289	<	t.start();
290	<	try{
291	<	LockSupport.unpark(t);
37	<	t.join();
38	<	}
39	<	catch(Exception e) {
40	<	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	<	}
279	>	/**
280	>	* parkNanos times out if not unparked
281	>	*/
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	<	public void testParkUntil() {
296	<	Thread t = new Thread(new Runnable(){
297	<	public void run(){
298	<	try{
299	<	long d = new Date().getTime() + 100;
300	<	LockSupport.parkUntil(d);
301	<	}catch(Exception e){
302	<	fail("unexpected exception");
303	<	}
304	<	}
305	<	});
306	<	try{
307	<	t.start();
308	<	t.join();
309	<	}
79	<	catch(Exception e) {
80	<	fail("unexpected exception");
81	<	}
295	>	/**
296	>	* parkUntil times out if not unparked
297	>	*/
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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