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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.7 by dl, Mon Dec 29 19:05:40 2003 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 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){
19		junit.textui.TestRunner.run(suite());
20		}
20	–
21	–
21		public static Test suite() {
22		return new TestSuite(AtomicLongFieldUpdaterTest.class);
23		}
24
25		/**
26	<	*
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");
32	>	(AtomicLongFieldUpdaterTest.class, "y");
33		shouldThrow();
34		}
35		catch (RuntimeException rt) {}
36		}
37
38		/**
39	<	*
39	>	* construction with field not of given type throws RuntimeException
40		*/
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) {}
49		}
50
51		/**
52	<	*
52	>	* construction with non-volatile field throws RuntimeException
53		*/
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 63 | public class AtomicLongFieldUpdaterTest
63		}
64
65		/**
66	<	*
66	>	*  get returns the last value set or assigned
67		*/
68		public void testGetSet(){
69	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
69	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
70		x = 1;
71		assertEquals(1,a.get(this));
72		a.set(this,2);
#	Line 77 | Line 76 | public class AtomicLongFieldUpdaterTest
76
77		}
78		/**
79	<	*
79	>	* compareAndSet succeeds in changing value if equal to expected else fails
80		*/
81		public void testCompareAndSet(){
82	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
82	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
83		x = 1;
84		assertTrue(a.compareAndSet(this,1,2));
85		assertTrue(a.compareAndSet(this,2,-4));
#	Line 91 | Line 90 | public class AtomicLongFieldUpdaterTest
90		assertEquals(7,a.get(this));
91		}
92
93	+
94	+	/**
95	+	* compareAndSet in one thread enables another waiting for value
96	+	* to succeed
97	+	*/
98	+	public void testCompareAndSetInMultipleThreads() {
99	+	x = 1;
100	+	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
101	+
102	+	Thread t = new Thread(new Runnable() {
103	+	public void run() {
104	+	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();
115	+	}
116	+	}
117	+
118		/**
119	<	*
119	>	* repeated weakCompareAndSet succeeds in changing value when equal
120	>	* to expected
121		*/
122		public void testWeakCompareAndSet(){
123	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
123	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
124		x = 1;
125		while(!a.weakCompareAndSet(this,1,2));
126		while(!a.weakCompareAndSet(this,2,-4));
#	Line 105 | Line 130 | public class AtomicLongFieldUpdaterTest
130		}
131
132		/**
133	<	*
133	>	*  getAndSet returns previous value and sets to given value
134		*/
135		public void testGetAndSet(){
136	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
136	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
137		x = 1;
138		assertEquals(1,a.getAndSet(this, 0));
139		assertEquals(0,a.getAndSet(this,-10));
#	Line 116 | Line 141 | public class AtomicLongFieldUpdaterTest
141		}
142
143		/**
144	<	*
144	>	* getAndAdd returns previous value and adds given value
145		*/
146		public void testGetAndAdd(){
147	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
147	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
148		x = 1;
149		assertEquals(1,a.getAndAdd(this,2));
150		assertEquals(3,a.get(this));
#	Line 128 | Line 153 | public class AtomicLongFieldUpdaterTest
153		}
154
155		/**
156	<	*
156	>	* getAndDecrement returns previous value and decrements
157		*/
158		public void testGetAndDecrement(){
159	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
159	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
160		x = 1;
161		assertEquals(1,a.getAndDecrement(this));
162		assertEquals(0,a.getAndDecrement(this));
#	Line 139 | Line 164 | public class AtomicLongFieldUpdaterTest
164		}
165
166		/**
167	<	*
167	>	* getAndIncrement returns previous value and increments
168		*/
169		public void testGetAndIncrement(){
170	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
170	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
171		x = 1;
172		assertEquals(1,a.getAndIncrement(this));
173		assertEquals(2,a.get(this));
#	Line 154 | Line 179 | public class AtomicLongFieldUpdaterTest
179		}
180
181		/**
182	<	*
182	>	* addAndGet adds given value to current, and returns current value
183		*/
184		public void testAddAndGet(){
185	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
185	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
186		x = 1;
187		assertEquals(3,a.addAndGet(this,2));
188		assertEquals(3,a.get(this));
#	Line 166 | Line 191 | public class AtomicLongFieldUpdaterTest
191		}
192
193		/**
194	<	*
194	>	*  decrementAndGet decrements and returns current value
195		*/
196		public void testDecrementAndGet(){
197	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
197	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
198		x = 1;
199		assertEquals(0,a.decrementAndGet(this));
200		assertEquals(-1,a.decrementAndGet(this));
#	Line 178 | Line 203 | public class AtomicLongFieldUpdaterTest
203		}
204
205		/**
206	<	*
206	>	* incrementAndGet increments and returns current value
207		*/
208		public void testIncrementAndGet(){
209	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
209	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
210		x = 1;
211		assertEquals(2,a.incrementAndGet(this));
212		assertEquals(2,a.get(this));

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