test/tck/AtomicIntegerFieldUpdaterTest.java

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/licenses/publicdomain
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

import java.util.concurrent.atomic.*;
import junit.framework.*;
import java.util.*;

public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
    volatile int x = 0;
    int w;
    long z;
    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }
    public static Test suite() {
        return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
    }

    /**
     * Construction with non-existent field throws RuntimeException
     */
    public void testConstructor() {
        try {
            AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
                a = AtomicIntegerFieldUpdater.newUpdater
                (AtomicIntegerFieldUpdaterTest.class, "y");
            shouldThrow();
        }
        catch (RuntimeException rt) {}
    }

    /**
     * construction with field not of given type throws RuntimeException
     */
    public void testConstructor2() {
        try {
            AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
                a = AtomicIntegerFieldUpdater.newUpdater
                (AtomicIntegerFieldUpdaterTest.class, "z");
            shouldThrow();
        }
        catch (RuntimeException rt) {}
    }

    /**
     * construction with non-volatile field throws RuntimeException
     */
    public void testConstructor3() {
        try {
            AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
                a = AtomicIntegerFieldUpdater.newUpdater
                (AtomicIntegerFieldUpdaterTest.class, "w");
            shouldThrow();
        }
        catch (RuntimeException rt) {}
    }

    /**
     *  get returns the last value set or assigned
     */
    public void testGetSet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(1,a.get(this));
        a.set(this,2);
        assertEquals(2,a.get(this));
        a.set(this,-3);
        assertEquals(-3,a.get(this));

    }

    /**
     *  get returns the last value lazySet by same thread
     */
    public void testGetLazySet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(1,a.get(this));
        a.lazySet(this,2);
        assertEquals(2,a.get(this));
        a.lazySet(this,-3);
        assertEquals(-3,a.get(this));

    }

    /**
     * compareAndSet succeeds in changing value if equal to expected else fails
     */
    public void testCompareAndSet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertTrue(a.compareAndSet(this,1,2));
        assertTrue(a.compareAndSet(this,2,-4));
        assertEquals(-4,a.get(this));
        assertFalse(a.compareAndSet(this,-5,7));
        assertFalse((7 == a.get(this)));
        assertTrue(a.compareAndSet(this,-4,7));
        assertEquals(7,a.get(this));
    }


    /**
     * compareAndSet in one thread enables another waiting for value
     * to succeed
     */
    public void testCompareAndSetInMultipleThreads() {
        x = 1;
        final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }

        Thread t = new Thread(new Runnable() {
                public void run() {
                    while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3)) Thread.yield();
                }});
        try {
            t.start();
            assertTrue(a.compareAndSet(this, 1, 2));
            t.join(LONG_DELAY_MS);
            assertFalse(t.isAlive());
            assertEquals(a.get(this), 3);
        }
        catch (Exception e) {
            unexpectedException();
        }
    }

    /**
     * repeated weakCompareAndSet succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        while (!a.weakCompareAndSet(this,1,2));
        while (!a.weakCompareAndSet(this,2,-4));
        assertEquals(-4,a.get(this));
        while (!a.weakCompareAndSet(this,-4,7));
        assertEquals(7,a.get(this));
    }

    /**
     *  getAndSet returns previous value and sets to given value
     */
    public void testGetAndSet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(1,a.getAndSet(this, 0));
        assertEquals(0,a.getAndSet(this,-10));
        assertEquals(-10,a.getAndSet(this,1));
    }

    /**
     * getAndAdd returns previous value and adds given value
     */
    public void testGetAndAdd() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(1,a.getAndAdd(this,2));
        assertEquals(3,a.get(this));
        assertEquals(3,a.getAndAdd(this,-4));
        assertEquals(-1,a.get(this));
    }

    /**
     * getAndDecrement returns previous value and decrements
     */
    public void testGetAndDecrement() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(1,a.getAndDecrement(this));
        assertEquals(0,a.getAndDecrement(this));
        assertEquals(-1,a.getAndDecrement(this));
    }

    /**
     * getAndIncrement returns previous value and increments
     */
    public void testGetAndIncrement() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(1,a.getAndIncrement(this));
        assertEquals(2,a.get(this));
        a.set(this,-2);
        assertEquals(-2,a.getAndIncrement(this));
        assertEquals(-1,a.getAndIncrement(this));
        assertEquals(0,a.getAndIncrement(this));
        assertEquals(1,a.get(this));
    }

    /**
     * addAndGet adds given value to current, and returns current value
     */
    public void testAddAndGet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(3,a.addAndGet(this,2));
        assertEquals(3,a.get(this));
        assertEquals(-1,a.addAndGet(this,-4));
        assertEquals(-1,a.get(this));
    }

    /**
     * decrementAndGet decrements and returns current value
     */
    public void testDecrementAndGet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(0,a.decrementAndGet(this));
        assertEquals(-1,a.decrementAndGet(this));
        assertEquals(-2,a.decrementAndGet(this));
        assertEquals(-2,a.get(this));
    }

    /**
     * incrementAndGet increments and returns current value
     */
    public void testIncrementAndGet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        x = 1;
        assertEquals(2,a.incrementAndGet(this));
        assertEquals(2,a.get(this));
        a.set(this,-2);
        assertEquals(-1,a.incrementAndGet(this));
        assertEquals(0,a.incrementAndGet(this));
        assertEquals(1,a.incrementAndGet(this));
        assertEquals(1,a.get(this));
    }

}
Revision:	1.12
Committed:	Mon Nov 16 05:30:07 2009 UTC (14 years, 6 months ago) by jsr166
Branch:	MAIN
Changes since 1.11:	+1 -1 lines
Log Message:	whitespace
#	User	Rev	Content
1	dl	1.1	/*
2	dl	1.6	* 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	jsr166	1.10	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9			import java.util.concurrent.atomic.*;
10			import junit.framework.*;
11			import java.util.*;
12
13	dl	1.2	public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
14	dl	1.1	volatile int x = 0;
15	dl	1.4	int w;
16	dl	1.2	long z;
17	jsr166	1.12	public static void main(String[] args) {
18	dl	1.1	junit.textui.TestRunner.run(suite());
19			}
20			public static Test suite() {
21			return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
22			}
23
24	dl	1.3	/**
25	dl	1.7	* Construction with non-existent field throws RuntimeException
26	dl	1.3	*/
27			public void testConstructor() {
28	jsr166	1.11	try {
29	jsr166	1.10	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
30	dl	1.1	a = AtomicIntegerFieldUpdater.newUpdater
31	dl	1.5	(AtomicIntegerFieldUpdaterTest.class, "y");
32	dl	1.3	shouldThrow();
33	dl	1.2	}
34			catch (RuntimeException rt) {}
35			}
36
37	dl	1.3	/**
38	dl	1.4	* construction with field not of given type throws RuntimeException
39	dl	1.3	*/
40			public void testConstructor2() {
41	jsr166	1.11	try {
42	jsr166	1.10	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
43	dl	1.2	a = AtomicIntegerFieldUpdater.newUpdater
44	dl	1.5	(AtomicIntegerFieldUpdaterTest.class, "z");
45	dl	1.3	shouldThrow();
46	dl	1.1	}
47			catch (RuntimeException rt) {}
48			}
49
50	dl	1.3	/**
51	dl	1.4	* construction with non-volatile field throws RuntimeException
52			*/
53			public void testConstructor3() {
54	jsr166	1.11	try {
55	jsr166	1.10	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
56	dl	1.4	a = AtomicIntegerFieldUpdater.newUpdater
57	dl	1.5	(AtomicIntegerFieldUpdaterTest.class, "w");
58	dl	1.4	shouldThrow();
59			}
60			catch (RuntimeException rt) {}
61			}
62
63			/**
64			* get returns the last value set or assigned
65	dl	1.3	*/
66			public void testGetSet() {
67	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
68			try {
69			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
70			} catch (RuntimeException ok) {
71			return;
72			}
73	dl	1.1	x = 1;
74			assertEquals(1,a.get(this));
75			a.set(this,2);
76			assertEquals(2,a.get(this));
77			a.set(this,-3);
78			assertEquals(-3,a.get(this));
79	jsr166	1.10
80	dl	1.1	}
81	dl	1.9
82			/**
83			* get returns the last value lazySet by same thread
84			*/
85			public void testGetLazySet() {
86			AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
87			try {
88			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
89			} catch (RuntimeException ok) {
90			return;
91			}
92			x = 1;
93			assertEquals(1,a.get(this));
94			a.lazySet(this,2);
95			assertEquals(2,a.get(this));
96			a.lazySet(this,-3);
97			assertEquals(-3,a.get(this));
98	jsr166	1.10
99	dl	1.9	}
100
101	dl	1.3	/**
102	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
103	dl	1.3	*/
104			public void testCompareAndSet() {
105	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
106			try {
107			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
108			} catch (RuntimeException ok) {
109			return;
110			}
111	dl	1.1	x = 1;
112			assertTrue(a.compareAndSet(this,1,2));
113			assertTrue(a.compareAndSet(this,2,-4));
114			assertEquals(-4,a.get(this));
115			assertFalse(a.compareAndSet(this,-5,7));
116			assertFalse((7 == a.get(this)));
117			assertTrue(a.compareAndSet(this,-4,7));
118			assertEquals(7,a.get(this));
119			}
120
121	dl	1.4
122			/**
123			* compareAndSet in one thread enables another waiting for value
124			* to succeed
125			*/
126			public void testCompareAndSetInMultipleThreads() {
127			x = 1;
128	dl	1.8	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a;
129			try {
130			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
131			} catch (RuntimeException ok) {
132			return;
133			}
134	dl	1.4
135			Thread t = new Thread(new Runnable() {
136			public void run() {
137	jsr166	1.11	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3)) Thread.yield();
138	dl	1.4	}});
139			try {
140			t.start();
141			assertTrue(a.compareAndSet(this, 1, 2));
142			t.join(LONG_DELAY_MS);
143			assertFalse(t.isAlive());
144			assertEquals(a.get(this), 3);
145			}
146	jsr166	1.11	catch (Exception e) {
147	dl	1.4	unexpectedException();
148			}
149			}
150
151	dl	1.3	/**
152	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
153	jsr166	1.10	* to expected
154	dl	1.3	*/
155			public void testWeakCompareAndSet() {
156	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
157			try {
158			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
159			} catch (RuntimeException ok) {
160			return;
161			}
162	dl	1.1	x = 1;
163	jsr166	1.11	while (!a.weakCompareAndSet(this,1,2));
164			while (!a.weakCompareAndSet(this,2,-4));
165	dl	1.1	assertEquals(-4,a.get(this));
166	jsr166	1.11	while (!a.weakCompareAndSet(this,-4,7));
167	dl	1.1	assertEquals(7,a.get(this));
168			}
169
170	dl	1.3	/**
171	dl	1.4	* getAndSet returns previous value and sets to given value
172	dl	1.3	*/
173			public void testGetAndSet() {
174	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
175			try {
176			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
177			} catch (RuntimeException ok) {
178			return;
179			}
180	dl	1.1	x = 1;
181			assertEquals(1,a.getAndSet(this, 0));
182			assertEquals(0,a.getAndSet(this,-10));
183			assertEquals(-10,a.getAndSet(this,1));
184			}
185
186	dl	1.3	/**
187	dl	1.4	* getAndAdd returns previous value and adds given value
188	dl	1.3	*/
189			public void testGetAndAdd() {
190	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
191			try {
192			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
193			} catch (RuntimeException ok) {
194			return;
195			}
196	dl	1.1	x = 1;
197			assertEquals(1,a.getAndAdd(this,2));
198			assertEquals(3,a.get(this));
199			assertEquals(3,a.getAndAdd(this,-4));
200			assertEquals(-1,a.get(this));
201			}
202
203	dl	1.3	/**
204	dl	1.4	* getAndDecrement returns previous value and decrements
205	dl	1.3	*/
206			public void testGetAndDecrement() {
207	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
208			try {
209			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
210			} catch (RuntimeException ok) {
211			return;
212			}
213	dl	1.1	x = 1;
214			assertEquals(1,a.getAndDecrement(this));
215			assertEquals(0,a.getAndDecrement(this));
216			assertEquals(-1,a.getAndDecrement(this));
217			}
218
219	dl	1.3	/**
220	dl	1.4	* getAndIncrement returns previous value and increments
221	dl	1.3	*/
222			public void testGetAndIncrement() {
223	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
224			try {
225			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
226			} catch (RuntimeException ok) {
227			return;
228			}
229	dl	1.1	x = 1;
230			assertEquals(1,a.getAndIncrement(this));
231			assertEquals(2,a.get(this));
232			a.set(this,-2);
233			assertEquals(-2,a.getAndIncrement(this));
234			assertEquals(-1,a.getAndIncrement(this));
235			assertEquals(0,a.getAndIncrement(this));
236			assertEquals(1,a.get(this));
237			}
238
239	dl	1.3	/**
240	dl	1.4	* addAndGet adds given value to current, and returns current value
241	dl	1.3	*/
242			public void testAddAndGet() {
243	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
244			try {
245			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
246			} catch (RuntimeException ok) {
247			return;
248			}
249	dl	1.1	x = 1;
250			assertEquals(3,a.addAndGet(this,2));
251			assertEquals(3,a.get(this));
252			assertEquals(-1,a.addAndGet(this,-4));
253			assertEquals(-1,a.get(this));
254			}
255
256	dl	1.3	/**
257	dl	1.4	* decrementAndGet decrements and returns current value
258	dl	1.3	*/
259			public void testDecrementAndGet() {
260	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
261			try {
262			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
263			} catch (RuntimeException ok) {
264			return;
265			}
266	dl	1.1	x = 1;
267			assertEquals(0,a.decrementAndGet(this));
268			assertEquals(-1,a.decrementAndGet(this));
269			assertEquals(-2,a.decrementAndGet(this));
270			assertEquals(-2,a.get(this));
271			}
272
273	dl	1.3	/**
274	dl	1.4	* incrementAndGet increments and returns current value
275	dl	1.3	*/
276			public void testIncrementAndGet() {
277	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
278			try {
279			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
280			} catch (RuntimeException ok) {
281			return;
282			}
283	dl	1.1	x = 1;
284			assertEquals(2,a.incrementAndGet(this));
285			assertEquals(2,a.get(this));
286			a.set(this,-2);
287			assertEquals(-1,a.incrementAndGet(this));
288			assertEquals(0,a.incrementAndGet(this));
289			assertEquals(1,a.incrementAndGet(this));
290			assertEquals(1,a.get(this));
291			}
292
293			}