test/tck/AtomicLongFieldUpdaterTest.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 AtomicLongFieldUpdaterTest extends JSR166TestCase {
    volatile long x = 0;
    int z;
    long w;

    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }
    public static Test suite() {
        return new TestSuite(AtomicLongFieldUpdaterTest.class);
    }

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

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

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

        catch (RuntimeException rt) {}
    }

    /**
     *  get returns the last value set or assigned
     */
    public void testGetSet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() throws Exception {
        x = 1;
        final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }

        Thread t = new Thread(new Runnable() {
                public void run() {
                    while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
                }});

        t.start();
        assertTrue(a.compareAndSet(this, 1, 2));
        t.join(LONG_DELAY_MS);
        assertFalse(t.isAlive());
        assertEquals(a.get(this), 3);
    }

    /**
     * repeated weakCompareAndSet succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        try {
            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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:	1.13
Committed:	Tue Nov 17 03:12:51 2009 UTC (14 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.12:	+7 -11 lines
Log Message:	nicer exception handling
#	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 AtomicLongFieldUpdaterTest extends JSR166TestCase {
14	dl	1.1	volatile long x = 0;
15	dl	1.4	int z;
16			long w;
17	dl	1.1
18	jsr166	1.12	public static void main(String[] args) {
19	dl	1.1	junit.textui.TestRunner.run(suite());
20			}
21			public static Test suite() {
22			return new TestSuite(AtomicLongFieldUpdaterTest.class);
23			}
24
25	dl	1.3	/**
26	dl	1.7	* Construction with non-existent field throws RuntimeException
27	dl	1.3	*/
28	jsr166	1.12	public void testConstructor() {
29	jsr166	1.11	try {
30	jsr166	1.10	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
31	dl	1.1	a = AtomicLongFieldUpdater.newUpdater
32	dl	1.5	(AtomicLongFieldUpdaterTest.class, "y");
33	dl	1.3	shouldThrow();
34	dl	1.1	}
35			catch (RuntimeException rt) {}
36			}
37
38	dl	1.3	/**
39	dl	1.4	* construction with field not of given type throws RuntimeException
40	dl	1.3	*/
41	jsr166	1.12	public void testConstructor2() {
42	jsr166	1.11	try {
43	jsr166	1.10	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
44	dl	1.1	a = AtomicLongFieldUpdater.newUpdater
45	dl	1.5	(AtomicLongFieldUpdaterTest.class, "z");
46	dl	1.3	shouldThrow();
47	dl	1.1	}
48			catch (RuntimeException rt) {}
49			}
50
51	dl	1.3	/**
52	dl	1.4	* construction with non-volatile field throws RuntimeException
53	dl	1.3	*/
54	jsr166	1.12	public void testConstructor3() {
55	jsr166	1.11	try {
56	jsr166	1.10	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
57	dl	1.1	a = AtomicLongFieldUpdater.newUpdater
58	dl	1.5	(AtomicLongFieldUpdaterTest.class, "w");
59	dl	1.3	shouldThrow();
60	dl	1.1	}
61
62			catch (RuntimeException rt) {}
63			}
64
65	dl	1.3	/**
66	dl	1.4	* get returns the last value set or assigned
67	dl	1.3	*/
68	jsr166	1.12	public void testGetSet() {
69	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
70			try {
71			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
72			} catch (RuntimeException ok) {
73			return;
74			}
75	dl	1.1	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));
81			}
82	dl	1.9
83			/**
84			* get returns the last value lazySet by same thread
85			*/
86	jsr166	1.12	public void testGetLazySet() {
87	dl	1.9	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	dl	1.3	/**
103	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
104	dl	1.3	*/
105	jsr166	1.12	public void testCompareAndSet() {
106	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
107			try {
108			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
109			} catch (RuntimeException ok) {
110			return;
111			}
112	dl	1.1	x = 1;
113			assertTrue(a.compareAndSet(this,1,2));
114			assertTrue(a.compareAndSet(this,2,-4));
115			assertEquals(-4,a.get(this));
116			assertFalse(a.compareAndSet(this,-5,7));
117			assertFalse((7 == a.get(this)));
118			assertTrue(a.compareAndSet(this,-4,7));
119			assertEquals(7,a.get(this));
120			}
121
122	dl	1.4
123			/**
124			* compareAndSet in one thread enables another waiting for value
125			* to succeed
126			*/
127	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws Exception {
128	dl	1.4	x = 1;
129	dl	1.8	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
130			try {
131			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
132			} catch (RuntimeException ok) {
133			return;
134			}
135	dl	1.4
136			Thread t = new Thread(new Runnable() {
137			public void run() {
138	jsr166	1.11	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
139	dl	1.4	}});
140	jsr166	1.13
141			t.start();
142			assertTrue(a.compareAndSet(this, 1, 2));
143			t.join(LONG_DELAY_MS);
144			assertFalse(t.isAlive());
145			assertEquals(a.get(this), 3);
146	dl	1.4	}
147
148	dl	1.3	/**
149	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
150	jsr166	1.10	* to expected
151	dl	1.3	*/
152	jsr166	1.12	public void testWeakCompareAndSet() {
153	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
154			try {
155			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
156			} catch (RuntimeException ok) {
157			return;
158			}
159	dl	1.1	x = 1;
160	jsr166	1.11	while (!a.weakCompareAndSet(this,1,2));
161			while (!a.weakCompareAndSet(this,2,-4));
162	dl	1.1	assertEquals(-4,a.get(this));
163	jsr166	1.11	while (!a.weakCompareAndSet(this,-4,7));
164	dl	1.1	assertEquals(7,a.get(this));
165			}
166
167	dl	1.3	/**
168	dl	1.4	* getAndSet returns previous value and sets to given value
169	dl	1.3	*/
170	jsr166	1.12	public void testGetAndSet() {
171	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
172			try {
173			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
174			} catch (RuntimeException ok) {
175			return;
176			}
177	dl	1.1	x = 1;
178			assertEquals(1,a.getAndSet(this, 0));
179			assertEquals(0,a.getAndSet(this,-10));
180			assertEquals(-10,a.getAndSet(this,1));
181			}
182
183	dl	1.3	/**
184	dl	1.4	* getAndAdd returns previous value and adds given value
185	dl	1.3	*/
186	jsr166	1.12	public void testGetAndAdd() {
187	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
188			try {
189			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
190			} catch (RuntimeException ok) {
191			return;
192			}
193	dl	1.1	x = 1;
194			assertEquals(1,a.getAndAdd(this,2));
195			assertEquals(3,a.get(this));
196			assertEquals(3,a.getAndAdd(this,-4));
197			assertEquals(-1,a.get(this));
198			}
199
200	dl	1.3	/**
201	dl	1.4	* getAndDecrement returns previous value and decrements
202	dl	1.3	*/
203	jsr166	1.12	public void testGetAndDecrement() {
204	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
205			try {
206			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
207			} catch (RuntimeException ok) {
208			return;
209			}
210	dl	1.1	x = 1;
211			assertEquals(1,a.getAndDecrement(this));
212			assertEquals(0,a.getAndDecrement(this));
213			assertEquals(-1,a.getAndDecrement(this));
214			}
215
216	dl	1.3	/**
217	dl	1.4	* getAndIncrement returns previous value and increments
218	dl	1.3	*/
219	jsr166	1.12	public void testGetAndIncrement() {
220	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
221			try {
222			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
223			} catch (RuntimeException ok) {
224			return;
225			}
226	dl	1.1	x = 1;
227			assertEquals(1,a.getAndIncrement(this));
228			assertEquals(2,a.get(this));
229			a.set(this,-2);
230			assertEquals(-2,a.getAndIncrement(this));
231			assertEquals(-1,a.getAndIncrement(this));
232			assertEquals(0,a.getAndIncrement(this));
233			assertEquals(1,a.get(this));
234			}
235
236	dl	1.3	/**
237	dl	1.4	* addAndGet adds given value to current, and returns current value
238	dl	1.3	*/
239	jsr166	1.12	public void testAddAndGet() {
240	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
241			try {
242			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
243			} catch (RuntimeException ok) {
244			return;
245			}
246	dl	1.1	x = 1;
247			assertEquals(3,a.addAndGet(this,2));
248			assertEquals(3,a.get(this));
249			assertEquals(-1,a.addAndGet(this,-4));
250			assertEquals(-1,a.get(this));
251			}
252
253	dl	1.3	/**
254	dl	1.4	* decrementAndGet decrements and returns current value
255	dl	1.3	*/
256	jsr166	1.12	public void testDecrementAndGet() {
257	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
258			try {
259			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
260			} catch (RuntimeException ok) {
261			return;
262			}
263	dl	1.1	x = 1;
264			assertEquals(0,a.decrementAndGet(this));
265			assertEquals(-1,a.decrementAndGet(this));
266			assertEquals(-2,a.decrementAndGet(this));
267			assertEquals(-2,a.get(this));
268			}
269
270	dl	1.3	/**
271	dl	1.4	* incrementAndGet increments and returns current value
272	dl	1.3	*/
273	jsr166	1.12	public void testIncrementAndGet() {
274	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
275			try {
276			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
277			} catch (RuntimeException ok) {
278			return;
279			}
280	dl	1.1	x = 1;
281			assertEquals(2,a.incrementAndGet(this));
282			assertEquals(2,a.get(this));
283			a.set(this,-2);
284			assertEquals(-1,a.incrementAndGet(this));
285			assertEquals(0,a.incrementAndGet(this));
286			assertEquals(1,a.incrementAndGet(this));
287			assertEquals(1,a.get(this));
288			}
289
290			}