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

Comparing jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.23 by jsr166, Fri Jun 10 20:17:11 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 with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
8	–	import java.util.concurrent.atomic.*;
9		import junit.framework.*;
10	<	import java.util.*;
10	>	import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
11
12	<	public class AtomicIntegerFieldUpdaterTest extends TestCase{
12	>	public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
13		volatile int x = 0;
14	<
15	<	public static void main(String[] args){
14	>	int w;
15	>	long z;
16	>	public static void main(String[] args) {
17		junit.textui.TestRunner.run(suite());
18		}
18	–
19	–
19		public static Test suite() {
20		return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
21		}
22
23	<	public void testConstructor(){
24	<	try{
25	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
23	>	/**
24	>	* Construction with non-existent field throws RuntimeException
25	>	*/
26	>	public void testConstructor() {
27	>	try {
28	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
29		a = AtomicIntegerFieldUpdater.newUpdater
30	<	(getClass(), "y");
31	<	fail("Exception not thrown");
32	<	}
31	<	catch (RuntimeException rt) {}
30	>	(AtomicIntegerFieldUpdaterTest.class, "y");
31	>	shouldThrow();
32	>	} catch (RuntimeException success) {}
33		}
34
35	<	public void testGetSet(){
36	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
37	<	x = 1;
38	<	assertEquals(1,a.get(this));
39	<	a.set(this,2);
40	<	assertEquals(2,a.get(this));
41	<	a.set(this,-3);
42	<	assertEquals(-3,a.get(this));
43	<
35	>	/**
36	>	* construction with field not of given type throws RuntimeException
37	>	*/
38	>	public void testConstructor2() {
39	>	try {
40	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
41	>	a = AtomicIntegerFieldUpdater.newUpdater
42	>	(AtomicIntegerFieldUpdaterTest.class, "z");
43	>	shouldThrow();
44	>	} catch (RuntimeException success) {}
45		}
46	<	public void testCompareAndSet(){
47	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
48	<	x = 1;
49	<	assertTrue(a.compareAndSet(this,1,2));
50	<	assertTrue(a.compareAndSet(this,2,-4));
51	<	assertEquals(-4,a.get(this));
52	<	assertFalse(a.compareAndSet(this,-5,7));
53	<	assertFalse((7 == a.get(this)));
54	<	assertTrue(a.compareAndSet(this,-4,7));
55	<	assertEquals(7,a.get(this));
46	>
47	>	/**
48	>	* construction with non-volatile field throws RuntimeException
49	>	*/
50	>	public void testConstructor3() {
51	>	try {
52	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
53	>	a = AtomicIntegerFieldUpdater.newUpdater
54	>	(AtomicIntegerFieldUpdaterTest.class, "w");
55	>	shouldThrow();
56	>	} catch (RuntimeException success) {}
57		}
58
59	<	public void testWeakCompareAndSet(){
60	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
59	>	/**
60	>	* get returns the last value set or assigned
61	>	*/
62	>	public void testGetSet() {
63	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
64	>	try {
65	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
66	>	} catch (RuntimeException ok) {
67	>	return;
68	>	}
69	>	x = 1;
70	>	assertEquals(1, a.get(this));
71	>	a.set(this, 2);
72	>	assertEquals(2, a.get(this));
73	>	a.set(this, -3);
74	>	assertEquals(-3, a.get(this));
75	>	}
76	>
77	>	/**
78	>	* get returns the last value lazySet by same thread
79	>	*/
80	>	public void testGetLazySet() {
81	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
82	>	try {
83	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
84	>	} catch (RuntimeException ok) {
85	>	return;
86	>	}
87	>	x = 1;
88	>	assertEquals(1, a.get(this));
89	>	a.lazySet(this, 2);
90	>	assertEquals(2, a.get(this));
91	>	a.lazySet(this, -3);
92	>	assertEquals(-3, a.get(this));
93	>	}
94	>
95	>	/**
96	>	* compareAndSet succeeds in changing value if equal to expected else fails
97	>	*/
98	>	public void testCompareAndSet() {
99	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
100	>	try {
101	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
102	>	} catch (RuntimeException ok) {
103	>	return;
104	>	}
105		x = 1;
106	<	while(!a.weakCompareAndSet(this,1,2));
107	<	while(!a.weakCompareAndSet(this,2,-4));
108	<	assertEquals(-4,a.get(this));
109	<	while(!a.weakCompareAndSet(this,-4,7));
110	<	assertEquals(7,a.get(this));
106	>	assertTrue(a.compareAndSet(this, 1, 2));
107	>	assertTrue(a.compareAndSet(this, 2, -4));
108	>	assertEquals(-4, a.get(this));
109	>	assertFalse(a.compareAndSet(this, -5, 7));
110	>	assertEquals(-4, a.get(this));
111	>	assertTrue(a.compareAndSet(this, -4, 7));
112	>	assertEquals(7, a.get(this));
113		}
114
115	<	public void testGetAndSet(){
116	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
115	>	/**
116	>	* compareAndSet in one thread enables another waiting for value
117	>	* to succeed
118	>	*/
119	>	public void testCompareAndSetInMultipleThreads() throws Exception {
120		x = 1;
121	<	assertEquals(1,a.getAndSet(this, 0));
122	<	assertEquals(0,a.getAndSet(this,-10));
123	<	assertEquals(-10,a.getAndSet(this,1));
124	<	}
121	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a;
122	>	try {
123	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
124	>	} catch (RuntimeException ok) {
125	>	return;
126	>	}
127
128	<	public void testGetAndAdd(){
129	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
128	>	Thread t = new Thread(new CheckedRunnable() {
129	>	public void realRun() {
130	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
131	>	Thread.yield();
132	>	}});
133	>
134	>	t.start();
135	>	assertTrue(a.compareAndSet(this, 1, 2));
136	>	t.join(LONG_DELAY_MS);
137	>	assertFalse(t.isAlive());
138	>	assertEquals(3, a.get(this));
139	>	}
140	>
141	>	/**
142	>	* repeated weakCompareAndSet succeeds in changing value when equal
143	>	* to expected
144	>	*/
145	>	public void testWeakCompareAndSet() {
146	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
147	>	try {
148	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
149	>	} catch (RuntimeException ok) {
150	>	return;
151	>	}
152		x = 1;
153	<	assertEquals(1,a.getAndAdd(this,2));
154	<	assertEquals(3,a.get(this));
155	<	assertEquals(3,a.getAndAdd(this,-4));
156	<	assertEquals(-1,a.get(this));
153	>	while (!a.weakCompareAndSet(this, 1, 2));
154	>	while (!a.weakCompareAndSet(this, 2, -4));
155	>	assertEquals(-4, a.get(this));
156	>	while (!a.weakCompareAndSet(this, -4, 7));
157	>	assertEquals(7, a.get(this));
158	>	}
159	>
160	>	/**
161	>	* getAndSet returns previous value and sets to given value
162	>	*/
163	>	public void testGetAndSet() {
164	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
165	>	try {
166	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
167	>	} catch (RuntimeException ok) {
168	>	return;
169	>	}
170	>	x = 1;
171	>	assertEquals(1, a.getAndSet(this, 0));
172	>	assertEquals(0, a.getAndSet(this, -10));
173	>	assertEquals(-10, a.getAndSet(this, 1));
174		}
175
176	<	public void testGetAndDecrement(){
177	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
176	>	/**
177	>	* getAndAdd returns previous value and adds given value
178	>	*/
179	>	public void testGetAndAdd() {
180	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
181	>	try {
182	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
183	>	} catch (RuntimeException ok) {
184	>	return;
185	>	}
186		x = 1;
187	<	assertEquals(1,a.getAndDecrement(this));
188	<	assertEquals(0,a.getAndDecrement(this));
189	<	assertEquals(-1,a.getAndDecrement(this));
187	>	assertEquals(1, a.getAndAdd(this, 2));
188	>	assertEquals(3, a.get(this));
189	>	assertEquals(3, a.getAndAdd(this, -4));
190	>	assertEquals(-1, a.get(this));
191		}
192
193	<	public void testGetAndIncrement(){
194	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
193	>	/**
194	>	* getAndDecrement returns previous value and decrements
195	>	*/
196	>	public void testGetAndDecrement() {
197	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
198	>	try {
199	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
200	>	} catch (RuntimeException ok) {
201	>	return;
202	>	}
203		x = 1;
204	<	assertEquals(1,a.getAndIncrement(this));
205	<	assertEquals(2,a.get(this));
206	<	a.set(this,-2);
97	<	assertEquals(-2,a.getAndIncrement(this));
98	<	assertEquals(-1,a.getAndIncrement(this));
99	<	assertEquals(0,a.getAndIncrement(this));
100	<	assertEquals(1,a.get(this));
204	>	assertEquals(1, a.getAndDecrement(this));
205	>	assertEquals(0, a.getAndDecrement(this));
206	>	assertEquals(-1, a.getAndDecrement(this));
207		}
208
209	<	public void testAddAndGet(){
210	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
209	>	/**
210	>	* getAndIncrement returns previous value and increments
211	>	*/
212	>	public void testGetAndIncrement() {
213	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
214	>	try {
215	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
216	>	} catch (RuntimeException ok) {
217	>	return;
218	>	}
219	>	x = 1;
220	>	assertEquals(1, a.getAndIncrement(this));
221	>	assertEquals(2, a.get(this));
222	>	a.set(this, -2);
223	>	assertEquals(-2, a.getAndIncrement(this));
224	>	assertEquals(-1, a.getAndIncrement(this));
225	>	assertEquals(0, a.getAndIncrement(this));
226	>	assertEquals(1, a.get(this));
227	>	}
228	>
229	>	/**
230	>	* addAndGet adds given value to current, and returns current value
231	>	*/
232	>	public void testAddAndGet() {
233	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
234	>	try {
235	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
236	>	} catch (RuntimeException ok) {
237	>	return;
238	>	}
239		x = 1;
240	<	assertEquals(3,a.addAndGet(this,2));
241	<	assertEquals(3,a.get(this));
242	<	assertEquals(-1,a.addAndGet(this,-4));
243	<	assertEquals(-1,a.get(this));
240	>	assertEquals(3, a.addAndGet(this, 2));
241	>	assertEquals(3, a.get(this));
242	>	assertEquals(-1, a.addAndGet(this, -4));
243	>	assertEquals(-1, a.get(this));
244		}
245
246	<	public void testDecrementAndGet(){
247	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
246	>	/**
247	>	* decrementAndGet decrements and returns current value
248	>	*/
249	>	public void testDecrementAndGet() {
250	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
251	>	try {
252	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
253	>	} catch (RuntimeException ok) {
254	>	return;
255	>	}
256		x = 1;
257	<	assertEquals(0,a.decrementAndGet(this));
258	<	assertEquals(-1,a.decrementAndGet(this));
259	<	assertEquals(-2,a.decrementAndGet(this));
260	<	assertEquals(-2,a.get(this));
257	>	assertEquals(0, a.decrementAndGet(this));
258	>	assertEquals(-1, a.decrementAndGet(this));
259	>	assertEquals(-2, a.decrementAndGet(this));
260	>	assertEquals(-2, a.get(this));
261		}
262
263	<	public void testIncrementAndGet(){
264	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
263	>	/**
264	>	* incrementAndGet increments and returns current value
265	>	*/
266	>	public void testIncrementAndGet() {
267	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
268	>	try {
269	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
270	>	} catch (RuntimeException ok) {
271	>	return;
272	>	}
273		x = 1;
274	<	assertEquals(2,a.incrementAndGet(this));
275	<	assertEquals(2,a.get(this));
276	<	a.set(this,-2);
277	<	assertEquals(-1,a.incrementAndGet(this));
278	<	assertEquals(0,a.incrementAndGet(this));
279	<	assertEquals(1,a.incrementAndGet(this));
280	<	assertEquals(1,a.get(this));
274	>	assertEquals(2, a.incrementAndGet(this));
275	>	assertEquals(2, a.get(this));
276	>	a.set(this, -2);
277	>	assertEquals(-1, a.incrementAndGet(this));
278	>	assertEquals(0, a.incrementAndGet(this));
279	>	assertEquals(1, a.incrementAndGet(this));
280	>	assertEquals(1, a.get(this));
281		}
282
283		}

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