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Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.14 by jsr166, Tue Nov 17 06:58:50 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 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      /**
26 <     *
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) {}
36      }
37  
38      /**
39 <     *
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) {}
49      }
50  
51      /**
52 <     *
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 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");
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));
77 –        
81      }
82 +
83      /**
84 <     *
84 >     *  get returns the last value lazySet by same thread
85       */
86 <    public void testCompareAndSet(){
87 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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.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;
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));
# Line 91 | Line 119 | public class AtomicLongFieldUpdaterTest
119          assertEquals(7,a.get(this));
120      }
121  
122 +
123      /**
124 <     *
124 >     * compareAndSet in one thread enables another waiting for value
125 >     * to succeed
126       */
127 <    public void testWeakCompareAndSet(){
98 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
127 >    public void testCompareAndSetInMultipleThreads() throws Exception {
128          x = 1;
129 <        while(!a.weakCompareAndSet(this,1,2));
130 <        while(!a.weakCompareAndSet(this,2,-4));
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
152 >     */
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));
164 >        while (!a.weakCompareAndSet(this,-4,7));
165          assertEquals(7,a.get(this));
166      }
167  
168      /**
169 <     *
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));
# Line 116 | Line 182 | public class AtomicLongFieldUpdaterTest
182      }
183  
184      /**
185 <     *
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));
# Line 128 | Line 199 | public class AtomicLongFieldUpdaterTest
199      }
200  
201      /**
202 <     *
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));
# Line 139 | Line 215 | public class AtomicLongFieldUpdaterTest
215      }
216  
217      /**
218 <     *
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));
# Line 154 | Line 235 | public class AtomicLongFieldUpdaterTest
235      }
236  
237      /**
238 <     *
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));
# Line 166 | Line 252 | public class AtomicLongFieldUpdaterTest
252      }
253  
254      /**
255 <     *
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));
# Line 178 | Line 269 | public class AtomicLongFieldUpdaterTest
269      }
270  
271      /**
272 <     *
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));

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