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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.2 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.20 by jsr166, Fri May 27 19:39:07 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 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
9		import java.util.concurrent.atomic.*;
#	Line 11 | Line 12 | import java.util.*;
12
13		public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
14		volatile long x = 0;
15	<	long z;
16	<	int w;
15	>	int z;
16	>	long w;
17
18	<	public static void main(String[] args){
18	>	public static void main(String[] args) {
19		junit.textui.TestRunner.run(suite());
20		}
20	–
21	–
21		public static Test suite() {
22		return new TestSuite(AtomicLongFieldUpdaterTest.class);
23		}
24
25	<	public void testConstructor(){
26	<	try{
27	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
25	>	/**
26	>	* Construction with non-existent field throws RuntimeException
27	>	*/
28	>	public void testConstructor() {
29	>	try {
30	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
31		a = AtomicLongFieldUpdater.newUpdater
32	<	(getClass(), "y");
33	<	fail("Exception not thrown");
34	<	}
33	<
34	<	catch (RuntimeException rt) {}
32	>	(AtomicLongFieldUpdaterTest.class, "y");
33	>	shouldThrow();
34	>	} catch (RuntimeException success) {}
35		}
36
37	<	public void testConstructor2(){
38	<	try{
39	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
37	>	/**
38	>	* construction with field not of given type throws RuntimeException
39	>	*/
40	>	public void testConstructor2() {
41	>	try {
42	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
43		a = AtomicLongFieldUpdater.newUpdater
44	<	(getClass(), "z");
45	<	fail("Exception not thrown");
46	<	}
44	<
45	<	catch (RuntimeException rt) {}
44	>	(AtomicLongFieldUpdaterTest.class, "z");
45	>	shouldThrow();
46	>	} catch (RuntimeException success) {}
47		}
48
49	<	public void testConstructor3(){
50	<	try{
51	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
49	>	/**
50	>	* construction with non-volatile field throws RuntimeException
51	>	*/
52	>	public void testConstructor3() {
53	>	try {
54	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
55		a = AtomicLongFieldUpdater.newUpdater
56	<	(getClass(), "w");
57	<	fail("Exception not thrown");
58	<	}
55	<
56	<	catch (RuntimeException rt) {}
56	>	(AtomicLongFieldUpdaterTest.class, "w");
57	>	shouldThrow();
58	>	} catch (RuntimeException success) {}
59		}
60
61	<	public void testGetSet(){
62	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
61	>	/**
62	>	* get returns the last value set or assigned
63	>	*/
64	>	public void testGetSet() {
65	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
66	>	try {
67	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
68	>	} catch (RuntimeException ok) {
69	>	return;
70	>	}
71		x = 1;
72	<	assertEquals(1,a.get(this));
73	<	a.set(this,2);
74	<	assertEquals(2,a.get(this));
75	<	a.set(this,-3);
76	<	assertEquals(-3,a.get(this));
77	<
78	<	}
79	<	public void testCompareAndSet(){
80	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
72	>	assertEquals(1,a.get(this));
73	>	a.set(this,2);
74	>	assertEquals(2,a.get(this));
75	>	a.set(this,-3);
76	>	assertEquals(-3,a.get(this));
77	>	}
78	>
79	>	/**
80	>	* get returns the last value lazySet by same thread
81	>	*/
82	>	public void testGetLazySet() {
83	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
84	>	try {
85	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
86	>	} catch (RuntimeException ok) {
87	>	return;
88	>	}
89		x = 1;
90	<	assertTrue(a.compareAndSet(this,1,2));
91	<	assertTrue(a.compareAndSet(this,2,-4));
92	<	assertEquals(-4,a.get(this));
93	<	assertFalse(a.compareAndSet(this,-5,7));
94	<	assertFalse((7 == a.get(this)));
95	<	assertTrue(a.compareAndSet(this,-4,7));
96	<	assertEquals(7,a.get(this));
97	<	}
98	<
99	<	public void testWeakCompareAndSet(){
100	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
90	>	assertEquals(1,a.get(this));
91	>	a.lazySet(this,2);
92	>	assertEquals(2,a.get(this));
93	>	a.lazySet(this,-3);
94	>	assertEquals(-3,a.get(this));
95	>	}
96	>
97	>	/**
98	>	* compareAndSet succeeds in changing value if equal to expected else fails
99	>	*/
100	>	public void testCompareAndSet() {
101	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
102	>	try {
103	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
104	>	} catch (RuntimeException ok) {
105	>	return;
106	>	}
107		x = 1;
108	<	while(!a.weakCompareAndSet(this,1,2));
109	<	while(!a.weakCompareAndSet(this,2,-4));
110	<	assertEquals(-4,a.get(this));
111	<	while(!a.weakCompareAndSet(this,-4,7));
112	<	assertEquals(7,a.get(this));
108	>	assertTrue(a.compareAndSet(this,1,2));
109	>	assertTrue(a.compareAndSet(this,2,-4));
110	>	assertEquals(-4,a.get(this));
111	>	assertFalse(a.compareAndSet(this,-5,7));
112	>	assertEquals(-4,a.get(this));
113	>	assertTrue(a.compareAndSet(this,-4,7));
114	>	assertEquals(7,a.get(this));
115		}
116
117	<	public void testGetAndSet(){
118	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
117	>	/**
118	>	* compareAndSet in one thread enables another waiting for value
119	>	* to succeed
120	>	*/
121	>	public void testCompareAndSetInMultipleThreads() throws Exception {
122		x = 1;
123	<	assertEquals(1,a.getAndSet(this, 0));
124	<	assertEquals(0,a.getAndSet(this,-10));
125	<	assertEquals(-10,a.getAndSet(this,1));
126	<	}
123	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
124	>	try {
125	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
126	>	} catch (RuntimeException ok) {
127	>	return;
128	>	}
129
130	<	public void testGetAndAdd(){
131	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
130	>	Thread t = new Thread(new CheckedRunnable() {
131	>	public void realRun() {
132	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
133	>	Thread.yield();
134	>	}});
135	>
136	>	t.start();
137	>	assertTrue(a.compareAndSet(this, 1, 2));
138	>	t.join(LONG_DELAY_MS);
139	>	assertFalse(t.isAlive());
140	>	assertEquals(a.get(this), 3);
141	>	}
142	>
143	>	/**
144	>	* repeated weakCompareAndSet succeeds in changing value when equal
145	>	* to expected
146	>	*/
147	>	public void testWeakCompareAndSet() {
148	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
149	>	try {
150	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
151	>	} catch (RuntimeException ok) {
152	>	return;
153	>	}
154		x = 1;
155	<	assertEquals(1,a.getAndAdd(this,2));
156	<	assertEquals(3,a.get(this));
157	<	assertEquals(3,a.getAndAdd(this,-4));
158	<	assertEquals(-1,a.get(this));
155	>	while (!a.weakCompareAndSet(this,1,2));
156	>	while (!a.weakCompareAndSet(this,2,-4));
157	>	assertEquals(-4,a.get(this));
158	>	while (!a.weakCompareAndSet(this,-4,7));
159	>	assertEquals(7,a.get(this));
160	>	}
161	>
162	>	/**
163	>	* getAndSet returns previous value and sets to given value
164	>	*/
165	>	public void testGetAndSet() {
166	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
167	>	try {
168	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
169	>	} catch (RuntimeException ok) {
170	>	return;
171	>	}
172	>	x = 1;
173	>	assertEquals(1,a.getAndSet(this, 0));
174	>	assertEquals(0,a.getAndSet(this,-10));
175	>	assertEquals(-10,a.getAndSet(this,1));
176		}
177
178	<	public void testGetAndDecrement(){
179	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
178	>	/**
179	>	* getAndAdd returns previous value and adds given value
180	>	*/
181	>	public void testGetAndAdd() {
182	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
183	>	try {
184	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
185	>	} catch (RuntimeException ok) {
186	>	return;
187	>	}
188		x = 1;
189	<	assertEquals(1,a.getAndDecrement(this));
190	<	assertEquals(0,a.getAndDecrement(this));
191	<	assertEquals(-1,a.getAndDecrement(this));
189	>	assertEquals(1,a.getAndAdd(this,2));
190	>	assertEquals(3,a.get(this));
191	>	assertEquals(3,a.getAndAdd(this,-4));
192	>	assertEquals(-1,a.get(this));
193		}
194
195	<	public void testGetAndIncrement(){
196	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
195	>	/**
196	>	* getAndDecrement returns previous value and decrements
197	>	*/
198	>	public void testGetAndDecrement() {
199	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
200	>	try {
201	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
202	>	} catch (RuntimeException ok) {
203	>	return;
204	>	}
205		x = 1;
206	<	assertEquals(1,a.getAndIncrement(this));
207	<	assertEquals(2,a.get(this));
208	<	a.set(this,-2);
122	<	assertEquals(-2,a.getAndIncrement(this));
123	<	assertEquals(-1,a.getAndIncrement(this));
124	<	assertEquals(0,a.getAndIncrement(this));
125	<	assertEquals(1,a.get(this));
206	>	assertEquals(1,a.getAndDecrement(this));
207	>	assertEquals(0,a.getAndDecrement(this));
208	>	assertEquals(-1,a.getAndDecrement(this));
209		}
210
211	<	public void testAddAndGet(){
212	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
211	>	/**
212	>	* getAndIncrement returns previous value and increments
213	>	*/
214	>	public void testGetAndIncrement() {
215	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
216	>	try {
217	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
218	>	} catch (RuntimeException ok) {
219	>	return;
220	>	}
221	>	x = 1;
222	>	assertEquals(1,a.getAndIncrement(this));
223	>	assertEquals(2,a.get(this));
224	>	a.set(this,-2);
225	>	assertEquals(-2,a.getAndIncrement(this));
226	>	assertEquals(-1,a.getAndIncrement(this));
227	>	assertEquals(0,a.getAndIncrement(this));
228	>	assertEquals(1,a.get(this));
229	>	}
230	>
231	>	/**
232	>	* addAndGet adds given value to current, and returns current value
233	>	*/
234	>	public void testAddAndGet() {
235	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
236	>	try {
237	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
238	>	} catch (RuntimeException ok) {
239	>	return;
240	>	}
241		x = 1;
242	<	assertEquals(3,a.addAndGet(this,2));
243	<	assertEquals(3,a.get(this));
244	<	assertEquals(-1,a.addAndGet(this,-4));
245	<	assertEquals(-1,a.get(this));
242	>	assertEquals(3,a.addAndGet(this,2));
243	>	assertEquals(3,a.get(this));
244	>	assertEquals(-1,a.addAndGet(this,-4));
245	>	assertEquals(-1,a.get(this));
246		}
247
248	<	public void testDecrementAndGet(){
249	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
248	>	/**
249	>	* decrementAndGet decrements and returns current value
250	>	*/
251	>	public void testDecrementAndGet() {
252	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
253	>	try {
254	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
255	>	} catch (RuntimeException ok) {
256	>	return;
257	>	}
258		x = 1;
259	<	assertEquals(0,a.decrementAndGet(this));
260	<	assertEquals(-1,a.decrementAndGet(this));
261	<	assertEquals(-2,a.decrementAndGet(this));
262	<	assertEquals(-2,a.get(this));
259	>	assertEquals(0,a.decrementAndGet(this));
260	>	assertEquals(-1,a.decrementAndGet(this));
261	>	assertEquals(-2,a.decrementAndGet(this));
262	>	assertEquals(-2,a.get(this));
263		}
264
265	<	public void testIncrementAndGet(){
266	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
265	>	/**
266	>	* incrementAndGet increments and returns current value
267	>	*/
268	>	public void testIncrementAndGet() {
269	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
270	>	try {
271	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
272	>	} catch (RuntimeException ok) {
273	>	return;
274	>	}
275		x = 1;
276	<	assertEquals(2,a.incrementAndGet(this));
277	<	assertEquals(2,a.get(this));
278	<	a.set(this,-2);
279	<	assertEquals(-1,a.incrementAndGet(this));
280	<	assertEquals(0,a.incrementAndGet(this));
281	<	assertEquals(1,a.incrementAndGet(this));
282	<	assertEquals(1,a.get(this));
276	>	assertEquals(2,a.incrementAndGet(this));
277	>	assertEquals(2,a.get(this));
278	>	a.set(this,-2);
279	>	assertEquals(-1,a.incrementAndGet(this));
280	>	assertEquals(0,a.incrementAndGet(this));
281	>	assertEquals(1,a.incrementAndGet(this));
282	>	assertEquals(1,a.get(this));
283		}
284
285		}

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