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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.6 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.17 by jsr166, Tue Dec 1 09:56:28 2009 UTC

#	Line 2 | Line 2
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/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import java.util.concurrent.atomic.*;
#	Line 15 | Line 15 | public class AtomicLongFieldUpdaterTest
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		}
21		public static Test suite() {
#	Line 23 | Line 23 | public class AtomicLongFieldUpdaterTest
23		}
24
25		/**
26	<	* Contruction with non-existent field throws RuntimeException
26	>	* Construction with non-existent field throws RuntimeException
27		*/
28	<	public void testConstructor(){
29	<	try{
30	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
28	>	public void testConstructor() {
29	>	try {
30	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
31		a = AtomicLongFieldUpdater.newUpdater
32		(AtomicLongFieldUpdaterTest.class, "y");
33		shouldThrow();
34	<	}
35	<	catch (RuntimeException rt) {}
34	>	} catch (RuntimeException success) {}
35		}
36
37		/**
38		* construction with field not of given type throws RuntimeException
39		*/
40	<	public void testConstructor2(){
41	<	try{
42	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
40	>	public void testConstructor2() {
41	>	try {
42	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
43		a = AtomicLongFieldUpdater.newUpdater
44		(AtomicLongFieldUpdaterTest.class, "z");
45		shouldThrow();
46	<	}
48	<	catch (RuntimeException rt) {}
46	>	} catch (RuntimeException success) {}
47		}
48
49		/**
50		* construction with non-volatile field throws RuntimeException
51		*/
52	<	public void testConstructor3(){
53	<	try{
54	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
52	>	public void testConstructor3() {
53	>	try {
54	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
55		a = AtomicLongFieldUpdater.newUpdater
56		(AtomicLongFieldUpdaterTest.class, "w");
57		shouldThrow();
58	<	}
61	<
62	<	catch (RuntimeException rt) {}
58	>	} catch (RuntimeException success) {}
59		}
60
61		/**
62		*  get returns the last value set or assigned
63		*/
64	<	public void testGetSet(){
65	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
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	>	/**
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	<	assertEquals(1,a.get(this));
91	<	a.set(this,2);
92	<	assertEquals(2,a.get(this));
93	<	a.set(this,-3);
94	<	assertEquals(-3,a.get(this));
76	<
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		/**
99		* compareAndSet succeeds in changing value if equal to expected else fails
100		*/
101	<	public void testCompareAndSet(){
102	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
101	>	public void testCompareAndSet() {
102	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
103	>	try {
104	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
105	>	} catch (RuntimeException ok) {
106	>	return;
107	>	}
108		x = 1;
109	<	assertTrue(a.compareAndSet(this,1,2));
110	<	assertTrue(a.compareAndSet(this,2,-4));
111	<	assertEquals(-4,a.get(this));
112	<	assertFalse(a.compareAndSet(this,-5,7));
113	<	assertFalse((7 == a.get(this)));
114	<	assertTrue(a.compareAndSet(this,-4,7));
115	<	assertEquals(7,a.get(this));
109	>	assertTrue(a.compareAndSet(this,1,2));
110	>	assertTrue(a.compareAndSet(this,2,-4));
111	>	assertEquals(-4,a.get(this));
112	>	assertFalse(a.compareAndSet(this,-5,7));
113	>	assertEquals(-4,a.get(this));
114	>	assertTrue(a.compareAndSet(this,-4,7));
115	>	assertEquals(7,a.get(this));
116		}
117
118
#	Line 95 | Line 120 | public class AtomicLongFieldUpdaterTest
120		* compareAndSet in one thread enables another waiting for value
121		* to succeed
122		*/
123	<	public void testCompareAndSetInMultipleThreads() {
123	>	public void testCompareAndSetInMultipleThreads() throws Exception {
124		x = 1;
125	<	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
126	<
127	<	Thread t = new Thread(new Runnable() {
128	<	public void run() {
129	<	while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
105	<	}});
106	<	try {
107	<	t.start();
108	<	assertTrue(a.compareAndSet(this, 1, 2));
109	<	t.join(LONG_DELAY_MS);
110	<	assertFalse(t.isAlive());
111	<	assertEquals(a.get(this), 3);
112	<	}
113	<	catch(Exception e) {
114	<	unexpectedException();
125	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
126	>	try {
127	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
128	>	} catch (RuntimeException ok) {
129	>	return;
130		}
131	+
132	+	Thread t = new Thread(new CheckedRunnable() {
133	+	public void realRun() {
134	+	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
135	+	Thread.yield();
136	+	}});
137	+
138	+	t.start();
139	+	assertTrue(a.compareAndSet(this, 1, 2));
140	+	t.join(LONG_DELAY_MS);
141	+	assertFalse(t.isAlive());
142	+	assertEquals(a.get(this), 3);
143		}
144
145		/**
146		* repeated weakCompareAndSet succeeds in changing value when equal
147	<	* to expected
147	>	* to expected
148		*/
149	<	public void testWeakCompareAndSet(){
150	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
149	>	public void testWeakCompareAndSet() {
150	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
151	>	try {
152	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
153	>	} catch (RuntimeException ok) {
154	>	return;
155	>	}
156		x = 1;
157	<	while(!a.weakCompareAndSet(this,1,2));
158	<	while(!a.weakCompareAndSet(this,2,-4));
159	<	assertEquals(-4,a.get(this));
160	<	while(!a.weakCompareAndSet(this,-4,7));
161	<	assertEquals(7,a.get(this));
157	>	while (!a.weakCompareAndSet(this,1,2));
158	>	while (!a.weakCompareAndSet(this,2,-4));
159	>	assertEquals(-4,a.get(this));
160	>	while (!a.weakCompareAndSet(this,-4,7));
161	>	assertEquals(7,a.get(this));
162		}
163
164		/**
165		*  getAndSet returns previous value and sets to given value
166		*/
167	<	public void testGetAndSet(){
168	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
167	>	public void testGetAndSet() {
168	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
169	>	try {
170	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
171	>	} catch (RuntimeException ok) {
172	>	return;
173	>	}
174		x = 1;
175	<	assertEquals(1,a.getAndSet(this, 0));
176	<	assertEquals(0,a.getAndSet(this,-10));
177	<	assertEquals(-10,a.getAndSet(this,1));
175	>	assertEquals(1,a.getAndSet(this, 0));
176	>	assertEquals(0,a.getAndSet(this,-10));
177	>	assertEquals(-10,a.getAndSet(this,1));
178		}
179
180		/**
181		* getAndAdd returns previous value and adds given value
182		*/
183	<	public void testGetAndAdd(){
184	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
183	>	public void testGetAndAdd() {
184	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
185	>	try {
186	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
187	>	} catch (RuntimeException ok) {
188	>	return;
189	>	}
190		x = 1;
191	<	assertEquals(1,a.getAndAdd(this,2));
192	<	assertEquals(3,a.get(this));
193	<	assertEquals(3,a.getAndAdd(this,-4));
194	<	assertEquals(-1,a.get(this));
191	>	assertEquals(1,a.getAndAdd(this,2));
192	>	assertEquals(3,a.get(this));
193	>	assertEquals(3,a.getAndAdd(this,-4));
194	>	assertEquals(-1,a.get(this));
195		}
196
197		/**
198		* getAndDecrement returns previous value and decrements
199		*/
200	<	public void testGetAndDecrement(){
201	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
200	>	public void testGetAndDecrement() {
201	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
202	>	try {
203	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
204	>	} catch (RuntimeException ok) {
205	>	return;
206	>	}
207		x = 1;
208	<	assertEquals(1,a.getAndDecrement(this));
209	<	assertEquals(0,a.getAndDecrement(this));
210	<	assertEquals(-1,a.getAndDecrement(this));
208	>	assertEquals(1,a.getAndDecrement(this));
209	>	assertEquals(0,a.getAndDecrement(this));
210	>	assertEquals(-1,a.getAndDecrement(this));
211		}
212
213		/**
214		* getAndIncrement returns previous value and increments
215		*/
216	<	public void testGetAndIncrement(){
217	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
216	>	public void testGetAndIncrement() {
217	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
218	>	try {
219	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
220	>	} catch (RuntimeException ok) {
221	>	return;
222	>	}
223		x = 1;
224	<	assertEquals(1,a.getAndIncrement(this));
225	<	assertEquals(2,a.get(this));
226	<	a.set(this,-2);
227	<	assertEquals(-2,a.getAndIncrement(this));
228	<	assertEquals(-1,a.getAndIncrement(this));
229	<	assertEquals(0,a.getAndIncrement(this));
230	<	assertEquals(1,a.get(this));
224	>	assertEquals(1,a.getAndIncrement(this));
225	>	assertEquals(2,a.get(this));
226	>	a.set(this,-2);
227	>	assertEquals(-2,a.getAndIncrement(this));
228	>	assertEquals(-1,a.getAndIncrement(this));
229	>	assertEquals(0,a.getAndIncrement(this));
230	>	assertEquals(1,a.get(this));
231		}
232
233		/**
234		* addAndGet adds given value to current, and returns current value
235		*/
236	<	public void testAddAndGet(){
237	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
236	>	public void testAddAndGet() {
237	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
238	>	try {
239	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
240	>	} catch (RuntimeException ok) {
241	>	return;
242	>	}
243		x = 1;
244	<	assertEquals(3,a.addAndGet(this,2));
245	<	assertEquals(3,a.get(this));
246	<	assertEquals(-1,a.addAndGet(this,-4));
247	<	assertEquals(-1,a.get(this));
244	>	assertEquals(3,a.addAndGet(this,2));
245	>	assertEquals(3,a.get(this));
246	>	assertEquals(-1,a.addAndGet(this,-4));
247	>	assertEquals(-1,a.get(this));
248		}
249
250		/**
251		*  decrementAndGet decrements and returns current value
252		*/
253	<	public void testDecrementAndGet(){
254	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
253	>	public void testDecrementAndGet() {
254	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
255	>	try {
256	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
257	>	} catch (RuntimeException ok) {
258	>	return;
259	>	}
260		x = 1;
261	<	assertEquals(0,a.decrementAndGet(this));
262	<	assertEquals(-1,a.decrementAndGet(this));
263	<	assertEquals(-2,a.decrementAndGet(this));
264	<	assertEquals(-2,a.get(this));
261	>	assertEquals(0,a.decrementAndGet(this));
262	>	assertEquals(-1,a.decrementAndGet(this));
263	>	assertEquals(-2,a.decrementAndGet(this));
264	>	assertEquals(-2,a.get(this));
265		}
266
267		/**
268		* incrementAndGet increments and returns current value
269		*/
270	<	public void testIncrementAndGet(){
271	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
270	>	public void testIncrementAndGet() {
271	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
272	>	try {
273	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
274	>	} catch (RuntimeException ok) {
275	>	return;
276	>	}
277		x = 1;
278	<	assertEquals(2,a.incrementAndGet(this));
279	<	assertEquals(2,a.get(this));
280	<	a.set(this,-2);
281	<	assertEquals(-1,a.incrementAndGet(this));
282	<	assertEquals(0,a.incrementAndGet(this));
283	<	assertEquals(1,a.incrementAndGet(this));
284	<	assertEquals(1,a.get(this));
278	>	assertEquals(2,a.incrementAndGet(this));
279	>	assertEquals(2,a.get(this));
280	>	a.set(this,-2);
281	>	assertEquals(-1,a.incrementAndGet(this));
282	>	assertEquals(0,a.incrementAndGet(this));
283	>	assertEquals(1,a.incrementAndGet(this));
284	>	assertEquals(1,a.get(this));
285		}
286
287		}

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