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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.15 by jsr166, Sat Nov 21 02:07:26 2009 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/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import java.util.concurrent.atomic.*;
#	Line 14 | 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 22 | 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	<	(getClass(), "y");
32	>	(AtomicLongFieldUpdaterTest.class, "y");
33		shouldThrow();
34		}
35		catch (RuntimeException rt) {}
#	Line 37 | Line 38 | public class AtomicLongFieldUpdaterTest
38		/**
39		* construction with field not of given type throws RuntimeException
40		*/
41	<	public void testConstructor2(){
42	<	try{
43	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
41	>	public void testConstructor2() {
42	>	try {
43	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
44		a = AtomicLongFieldUpdater.newUpdater
45	<	(getClass(), "z");
45	>	(AtomicLongFieldUpdaterTest.class, "z");
46		shouldThrow();
47		}
48		catch (RuntimeException rt) {}
#	Line 50 | Line 51 | public class AtomicLongFieldUpdaterTest
51		/**
52		* construction with non-volatile field throws RuntimeException
53		*/
54	<	public void testConstructor3(){
55	<	try{
56	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
54	>	public void testConstructor3() {
55	>	try {
56	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
57		a = AtomicLongFieldUpdater.newUpdater
58	<	(getClass(), "w");
58	>	(AtomicLongFieldUpdaterTest.class, "w");
59		shouldThrow();
60		}
61
#	Line 64 | Line 65 | public class AtomicLongFieldUpdaterTest
65		/**
66		*  get returns the last value set or assigned
67		*/
68	<	public void testGetSet(){
69	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
68	>	public void testGetSet() {
69	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
70	>	try {
71	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
72	>	} catch (RuntimeException ok) {
73	>	return;
74	>	}
75	>	x = 1;
76	>	assertEquals(1,a.get(this));
77	>	a.set(this,2);
78	>	assertEquals(2,a.get(this));
79	>	a.set(this,-3);
80	>	assertEquals(-3,a.get(this));
81	>	}
82	>
83	>	/**
84	>	*  get returns the last value lazySet by same thread
85	>	*/
86	>	public void testGetLazySet() {
87	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
88	>	try {
89	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
90	>	} catch (RuntimeException ok) {
91	>	return;
92	>	}
93		x = 1;
94	<	assertEquals(1,a.get(this));
95	<	a.set(this,2);
96	<	assertEquals(2,a.get(this));
97	<	a.set(this,-3);
98	<	assertEquals(-3,a.get(this));
75	<
94	>	assertEquals(1,a.get(this));
95	>	a.lazySet(this,2);
96	>	assertEquals(2,a.get(this));
97	>	a.lazySet(this,-3);
98	>	assertEquals(-3,a.get(this));
99		}
100	+
101	+
102		/**
103		* compareAndSet succeeds in changing value if equal to expected else fails
104		*/
105	<	public void testCompareAndSet(){
106	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
105	>	public void testCompareAndSet() {
106	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
107	>	try {
108	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
109	>	} catch (RuntimeException ok) {
110	>	return;
111	>	}
112		x = 1;
113	<	assertTrue(a.compareAndSet(this,1,2));
114	<	assertTrue(a.compareAndSet(this,2,-4));
115	<	assertEquals(-4,a.get(this));
116	<	assertFalse(a.compareAndSet(this,-5,7));
117	<	assertFalse((7 == a.get(this)));
118	<	assertTrue(a.compareAndSet(this,-4,7));
119	<	assertEquals(7,a.get(this));
113	>	assertTrue(a.compareAndSet(this,1,2));
114	>	assertTrue(a.compareAndSet(this,2,-4));
115	>	assertEquals(-4,a.get(this));
116	>	assertFalse(a.compareAndSet(this,-5,7));
117	>	assertFalse((7 == a.get(this)));
118	>	assertTrue(a.compareAndSet(this,-4,7));
119	>	assertEquals(7,a.get(this));
120		}
121
122
#	Line 94 | Line 124 | public class AtomicLongFieldUpdaterTest
124		* compareAndSet in one thread enables another waiting for value
125		* to succeed
126		*/
127	<	public void testCompareAndSetInMultipleThreads() {
127	>	public void testCompareAndSetInMultipleThreads() throws Exception {
128		x = 1;
129	<	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
130	<
131	<	Thread t = new Thread(new Runnable() {
132	<	public void run() {
133	<	while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
104	<	}});
105	<	try {
106	<	t.start();
107	<	assertTrue(a.compareAndSet(this, 1, 2));
108	<	t.join(LONG_DELAY_MS);
109	<	assertFalse(t.isAlive());
110	<	assertEquals(a.get(this), 3);
111	<	}
112	<	catch(Exception e) {
113	<	unexpectedException();
129	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
130	>	try {
131	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
132	>	} catch (RuntimeException ok) {
133	>	return;
134		}
135	+
136	+	Thread t = new Thread(new CheckedRunnable() {
137	+	public void realRun() {
138	+	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
139	+	Thread.yield();
140	+	}});
141	+
142	+	t.start();
143	+	assertTrue(a.compareAndSet(this, 1, 2));
144	+	t.join(LONG_DELAY_MS);
145	+	assertFalse(t.isAlive());
146	+	assertEquals(a.get(this), 3);
147		}
148
149		/**
150		* repeated weakCompareAndSet succeeds in changing value when equal
151	<	* to expected
151	>	* to expected
152		*/
153	<	public void testWeakCompareAndSet(){
154	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
153	>	public void testWeakCompareAndSet() {
154	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
155	>	try {
156	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
157	>	} catch (RuntimeException ok) {
158	>	return;
159	>	}
160		x = 1;
161	<	while(!a.weakCompareAndSet(this,1,2));
162	<	while(!a.weakCompareAndSet(this,2,-4));
163	<	assertEquals(-4,a.get(this));
164	<	while(!a.weakCompareAndSet(this,-4,7));
165	<	assertEquals(7,a.get(this));
161	>	while (!a.weakCompareAndSet(this,1,2));
162	>	while (!a.weakCompareAndSet(this,2,-4));
163	>	assertEquals(-4,a.get(this));
164	>	while (!a.weakCompareAndSet(this,-4,7));
165	>	assertEquals(7,a.get(this));
166		}
167
168		/**
169		*  getAndSet returns previous value and sets to given value
170		*/
171	<	public void testGetAndSet(){
172	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
171	>	public void testGetAndSet() {
172	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
173	>	try {
174	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
175	>	} catch (RuntimeException ok) {
176	>	return;
177	>	}
178		x = 1;
179	<	assertEquals(1,a.getAndSet(this, 0));
180	<	assertEquals(0,a.getAndSet(this,-10));
181	<	assertEquals(-10,a.getAndSet(this,1));
179	>	assertEquals(1,a.getAndSet(this, 0));
180	>	assertEquals(0,a.getAndSet(this,-10));
181	>	assertEquals(-10,a.getAndSet(this,1));
182		}
183
184		/**
185		* getAndAdd returns previous value and adds given value
186		*/
187	<	public void testGetAndAdd(){
188	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
187	>	public void testGetAndAdd() {
188	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
189	>	try {
190	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
191	>	} catch (RuntimeException ok) {
192	>	return;
193	>	}
194		x = 1;
195	<	assertEquals(1,a.getAndAdd(this,2));
196	<	assertEquals(3,a.get(this));
197	<	assertEquals(3,a.getAndAdd(this,-4));
198	<	assertEquals(-1,a.get(this));
195	>	assertEquals(1,a.getAndAdd(this,2));
196	>	assertEquals(3,a.get(this));
197	>	assertEquals(3,a.getAndAdd(this,-4));
198	>	assertEquals(-1,a.get(this));
199		}
200
201		/**
202		* getAndDecrement returns previous value and decrements
203		*/
204	<	public void testGetAndDecrement(){
205	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
204	>	public void testGetAndDecrement() {
205	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
206	>	try {
207	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
208	>	} catch (RuntimeException ok) {
209	>	return;
210	>	}
211		x = 1;
212	<	assertEquals(1,a.getAndDecrement(this));
213	<	assertEquals(0,a.getAndDecrement(this));
214	<	assertEquals(-1,a.getAndDecrement(this));
212	>	assertEquals(1,a.getAndDecrement(this));
213	>	assertEquals(0,a.getAndDecrement(this));
214	>	assertEquals(-1,a.getAndDecrement(this));
215		}
216
217		/**
218		* getAndIncrement returns previous value and increments
219		*/
220	<	public void testGetAndIncrement(){
221	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
220	>	public void testGetAndIncrement() {
221	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
222	>	try {
223	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
224	>	} catch (RuntimeException ok) {
225	>	return;
226	>	}
227		x = 1;
228	<	assertEquals(1,a.getAndIncrement(this));
229	<	assertEquals(2,a.get(this));
230	<	a.set(this,-2);
231	<	assertEquals(-2,a.getAndIncrement(this));
232	<	assertEquals(-1,a.getAndIncrement(this));
233	<	assertEquals(0,a.getAndIncrement(this));
234	<	assertEquals(1,a.get(this));
228	>	assertEquals(1,a.getAndIncrement(this));
229	>	assertEquals(2,a.get(this));
230	>	a.set(this,-2);
231	>	assertEquals(-2,a.getAndIncrement(this));
232	>	assertEquals(-1,a.getAndIncrement(this));
233	>	assertEquals(0,a.getAndIncrement(this));
234	>	assertEquals(1,a.get(this));
235		}
236
237		/**
238		* addAndGet adds given value to current, and returns current value
239		*/
240	<	public void testAddAndGet(){
241	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
240	>	public void testAddAndGet() {
241	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
242	>	try {
243	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
244	>	} catch (RuntimeException ok) {
245	>	return;
246	>	}
247		x = 1;
248	<	assertEquals(3,a.addAndGet(this,2));
249	<	assertEquals(3,a.get(this));
250	<	assertEquals(-1,a.addAndGet(this,-4));
251	<	assertEquals(-1,a.get(this));
248	>	assertEquals(3,a.addAndGet(this,2));
249	>	assertEquals(3,a.get(this));
250	>	assertEquals(-1,a.addAndGet(this,-4));
251	>	assertEquals(-1,a.get(this));
252		}
253
254		/**
255		*  decrementAndGet decrements and returns current value
256		*/
257	<	public void testDecrementAndGet(){
258	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
257	>	public void testDecrementAndGet() {
258	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
259	>	try {
260	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
261	>	} catch (RuntimeException ok) {
262	>	return;
263	>	}
264		x = 1;
265	<	assertEquals(0,a.decrementAndGet(this));
266	<	assertEquals(-1,a.decrementAndGet(this));
267	<	assertEquals(-2,a.decrementAndGet(this));
268	<	assertEquals(-2,a.get(this));
265	>	assertEquals(0,a.decrementAndGet(this));
266	>	assertEquals(-1,a.decrementAndGet(this));
267	>	assertEquals(-2,a.decrementAndGet(this));
268	>	assertEquals(-2,a.get(this));
269		}
270
271		/**
272		* incrementAndGet increments and returns current value
273		*/
274	<	public void testIncrementAndGet(){
275	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
274	>	public void testIncrementAndGet() {
275	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
276	>	try {
277	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
278	>	} catch (RuntimeException ok) {
279	>	return;
280	>	}
281		x = 1;
282	<	assertEquals(2,a.incrementAndGet(this));
283	<	assertEquals(2,a.get(this));
284	<	a.set(this,-2);
285	<	assertEquals(-1,a.incrementAndGet(this));
286	<	assertEquals(0,a.incrementAndGet(this));
287	<	assertEquals(1,a.incrementAndGet(this));
288	<	assertEquals(1,a.get(this));
282	>	assertEquals(2,a.incrementAndGet(this));
283	>	assertEquals(2,a.get(this));
284	>	a.set(this,-2);
285	>	assertEquals(-1,a.incrementAndGet(this));
286	>	assertEquals(0,a.incrementAndGet(this));
287	>	assertEquals(1,a.incrementAndGet(this));
288	>	assertEquals(1,a.get(this));
289		}
290
291		}

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