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Comparing jsr166/src/test/tck/AtomicReferenceFieldUpdaterTest.java (file contents):
Revision 1.7 by dl, Mon Dec 29 19:05:40 2003 UTC vs.
Revision 1.12 by jsr166, Mon Nov 16 04:57:10 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 26 | Line 26 | public class AtomicReferenceFieldUpdater
26       * Construction with non-existent field throws RuntimeException
27       */
28      public void testConstructor(){
29 <        try{
29 >        try {
30              AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
31                  a = AtomicReferenceFieldUpdater.newUpdater
32                  (AtomicReferenceFieldUpdaterTest.class, Integer.class, "y");
# Line 40 | Line 40 | public class AtomicReferenceFieldUpdater
40       * construction with field not of given type throws RuntimeException
41       */
42      public void testConstructor2(){
43 <        try{
43 >        try {
44              AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
45                  a = AtomicReferenceFieldUpdater.newUpdater
46                  (AtomicReferenceFieldUpdaterTest.class, Integer.class, "z");
# Line 53 | Line 53 | public class AtomicReferenceFieldUpdater
53       * Constructor with non-volatile field throws exception
54       */
55      public void testConstructor3(){
56 <        try{
56 >        try {
57              AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
58                  a = AtomicReferenceFieldUpdater.newUpdater
59                  (AtomicReferenceFieldUpdaterTest.class, Integer.class, "w");
# Line 66 | Line 66 | public class AtomicReferenceFieldUpdater
66       *  get returns the last value set or assigned
67       */
68      public void testGetSet(){
69 <        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
69 >        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
70 >        try {
71 >            a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
72 >        } catch (RuntimeException ok) {
73 >            return;
74 >        }
75          x = one;
76          assertEquals(one,a.get(this));
77          a.set(this,two);
78          assertEquals(two,a.get(this));
79 <        a.set(this,-3);
80 <        assertEquals(-3,a.get(this));
76 <        
79 >        a.set(this,m3);
80 >        assertEquals(m3,a.get(this));
81      }
82 +
83 +    /**
84 +     *  get returns the last value lazySet by same thread
85 +     */
86 +    public void testGetLazySet(){
87 +        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
88 +        try {
89 +            a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
90 +        } catch (RuntimeException ok) {
91 +            return;
92 +        }
93 +        x = one;
94 +        assertEquals(one,a.get(this));
95 +        a.lazySet(this,two);
96 +        assertEquals(two,a.get(this));
97 +        a.lazySet(this,m3);
98 +        assertEquals(m3,a.get(this));
99 +    }
100 +
101      /**
102       * compareAndSet succeeds in changing value if equal to expected else fails
103       */
104      public void testCompareAndSet(){
105 <        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
105 >        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
106 >        try {
107 >            a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
108 >        } catch (RuntimeException ok) {
109 >            return;
110 >        }
111          x = one;
112          assertTrue(a.compareAndSet(this,one,two));
113          assertTrue(a.compareAndSet(this,two,m4));
# Line 96 | Line 124 | public class AtomicReferenceFieldUpdater
124       */
125      public void testCompareAndSetInMultipleThreads() {
126          x = one;
127 <        final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
127 >        final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
128 >        try {
129 >            a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
130 >        } catch (RuntimeException ok) {
131 >            return;
132 >        }
133  
134          Thread t = new Thread(new Runnable() {
135                  public void run() {
136 <                    while(!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three)) Thread.yield();
136 >                    while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three)) Thread.yield();
137                  }});
138          try {
139              t.start();
# Line 109 | Line 142 | public class AtomicReferenceFieldUpdater
142              assertFalse(t.isAlive());
143              assertEquals(a.get(this), three);
144          }
145 <        catch(Exception e) {
145 >        catch (Exception e) {
146              unexpectedException();
147          }
148      }
149  
150      /**
151       * repeated weakCompareAndSet succeeds in changing value when equal
152 <     * to expected
152 >     * to expected
153       */
154      public void testWeakCompareAndSet(){
155 <        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
155 >        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
156 >        try {
157 >            a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
158 >        } catch (RuntimeException ok) {
159 >            return;
160 >        }
161          x = one;
162 <        while(!a.weakCompareAndSet(this,one,two));
163 <        while(!a.weakCompareAndSet(this,two,m4));
162 >        while (!a.weakCompareAndSet(this,one,two));
163 >        while (!a.weakCompareAndSet(this,two,m4));
164          assertEquals(m4,a.get(this));
165 <        while(!a.weakCompareAndSet(this,m4,seven));
165 >        while (!a.weakCompareAndSet(this,m4,seven));
166          assertEquals(seven,a.get(this));
167      }
168  
# Line 132 | Line 170 | public class AtomicReferenceFieldUpdater
170       * getAndSet returns previous value and sets to given value
171       */
172      public void testGetAndSet(){
173 <        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
173 >        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
174 >        try {
175 >            a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
176 >        } catch (RuntimeException ok) {
177 >            return;
178 >        }
179          x = one;
180          assertEquals(one,a.getAndSet(this, zero));
181          assertEquals(zero,a.getAndSet(this,m10));

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