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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.7 by dl, Mon Dec 29 19:05:40 2003 UTC vs.
Revision 1.24 by jsr166, Mon Apr 1 20:58:58 2013 UTC

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

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