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 success) {}
    }

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

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

    /**
     * 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));
        assertEquals(-4,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 CheckedRunnable() {
            public void realRun() {
                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:	1.18
Committed:	Sat Oct 9 19:30:34 2010 UTC (13 years, 7 months ago) by jsr166
Branch:	MAIN
Changes since 1.17:	+4 -4 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 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	jsr166	1.16	} catch (RuntimeException success) {}
35	dl	1.1	}
36
37	dl	1.3	/**
38	dl	1.4	* construction with field not of given type throws RuntimeException
39	dl	1.3	*/
40	jsr166	1.12	public void testConstructor2() {
41	jsr166	1.11	try {
42	jsr166	1.10	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
43	dl	1.1	a = AtomicLongFieldUpdater.newUpdater
44	dl	1.5	(AtomicLongFieldUpdaterTest.class, "z");
45	dl	1.3	shouldThrow();
46	jsr166	1.16	} catch (RuntimeException success) {}
47	dl	1.1	}
48
49	dl	1.3	/**
50	dl	1.4	* construction with non-volatile field throws RuntimeException
51	dl	1.3	*/
52	jsr166	1.12	public void testConstructor3() {
53	jsr166	1.11	try {
54	jsr166	1.10	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
55	dl	1.1	a = AtomicLongFieldUpdater.newUpdater
56	dl	1.5	(AtomicLongFieldUpdaterTest.class, "w");
57	dl	1.3	shouldThrow();
58	jsr166	1.16	} catch (RuntimeException success) {}
59	dl	1.1	}
60
61	dl	1.3	/**
62	jsr166	1.18	* get returns the last value set or assigned
63	dl	1.3	*/
64	jsr166	1.12	public void testGetSet() {
65	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
66			try {
67			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
68			} catch (RuntimeException ok) {
69			return;
70			}
71	dl	1.1	x = 1;
72	jsr166	1.15	assertEquals(1,a.get(this));
73			a.set(this,2);
74			assertEquals(2,a.get(this));
75			a.set(this,-3);
76			assertEquals(-3,a.get(this));
77	dl	1.1	}
78	dl	1.9
79			/**
80	jsr166	1.18	* get returns the last value lazySet by same thread
81	dl	1.9	*/
82	jsr166	1.12	public void testGetLazySet() {
83	dl	1.9	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
84			try {
85			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
86			} catch (RuntimeException ok) {
87			return;
88			}
89			x = 1;
90	jsr166	1.15	assertEquals(1,a.get(this));
91			a.lazySet(this,2);
92			assertEquals(2,a.get(this));
93			a.lazySet(this,-3);
94			assertEquals(-3,a.get(this));
95	dl	1.9	}
96
97
98	dl	1.3	/**
99	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
100	dl	1.3	*/
101	jsr166	1.12	public void testCompareAndSet() {
102	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
103			try {
104			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
105			} catch (RuntimeException ok) {
106			return;
107			}
108	dl	1.1	x = 1;
109	jsr166	1.15	assertTrue(a.compareAndSet(this,1,2));
110			assertTrue(a.compareAndSet(this,2,-4));
111			assertEquals(-4,a.get(this));
112			assertFalse(a.compareAndSet(this,-5,7));
113	jsr166	1.17	assertEquals(-4,a.get(this));
114	jsr166	1.15	assertTrue(a.compareAndSet(this,-4,7));
115			assertEquals(7,a.get(this));
116	dl	1.1	}
117
118	dl	1.4
119			/**
120			* compareAndSet in one thread enables another waiting for value
121			* to succeed
122			*/
123	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws Exception {
124	dl	1.4	x = 1;
125	dl	1.8	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
126			try {
127			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
128			} catch (RuntimeException ok) {
129			return;
130			}
131	dl	1.4
132	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
133			public void realRun() {
134			while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
135			Thread.yield();
136			}});
137	jsr166	1.13
138			t.start();
139			assertTrue(a.compareAndSet(this, 1, 2));
140			t.join(LONG_DELAY_MS);
141			assertFalse(t.isAlive());
142			assertEquals(a.get(this), 3);
143	dl	1.4	}
144
145	dl	1.3	/**
146	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
147	jsr166	1.10	* to expected
148	dl	1.3	*/
149	jsr166	1.12	public void testWeakCompareAndSet() {
150	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
151			try {
152			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
153			} catch (RuntimeException ok) {
154			return;
155			}
156	dl	1.1	x = 1;
157	jsr166	1.15	while (!a.weakCompareAndSet(this,1,2));
158	jsr166	1.11	while (!a.weakCompareAndSet(this,2,-4));
159	jsr166	1.15	assertEquals(-4,a.get(this));
160			while (!a.weakCompareAndSet(this,-4,7));
161			assertEquals(7,a.get(this));
162	dl	1.1	}
163
164	dl	1.3	/**
165	jsr166	1.18	* getAndSet returns previous value and sets to given value
166	dl	1.3	*/
167	jsr166	1.12	public void testGetAndSet() {
168	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
169			try {
170			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
171			} catch (RuntimeException ok) {
172			return;
173			}
174	dl	1.1	x = 1;
175	jsr166	1.15	assertEquals(1,a.getAndSet(this, 0));
176			assertEquals(0,a.getAndSet(this,-10));
177			assertEquals(-10,a.getAndSet(this,1));
178	dl	1.1	}
179
180	dl	1.3	/**
181	dl	1.4	* getAndAdd returns previous value and adds given value
182	dl	1.3	*/
183	jsr166	1.12	public void testGetAndAdd() {
184	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
185			try {
186			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
187			} catch (RuntimeException ok) {
188			return;
189			}
190	dl	1.1	x = 1;
191	jsr166	1.15	assertEquals(1,a.getAndAdd(this,2));
192			assertEquals(3,a.get(this));
193			assertEquals(3,a.getAndAdd(this,-4));
194			assertEquals(-1,a.get(this));
195	dl	1.1	}
196
197	dl	1.3	/**
198	dl	1.4	* getAndDecrement returns previous value and decrements
199	dl	1.3	*/
200	jsr166	1.12	public void testGetAndDecrement() {
201	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
202			try {
203			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
204			} catch (RuntimeException ok) {
205			return;
206			}
207	dl	1.1	x = 1;
208	jsr166	1.15	assertEquals(1,a.getAndDecrement(this));
209			assertEquals(0,a.getAndDecrement(this));
210			assertEquals(-1,a.getAndDecrement(this));
211	dl	1.1	}
212
213	dl	1.3	/**
214	dl	1.4	* getAndIncrement returns previous value and increments
215	dl	1.3	*/
216	jsr166	1.12	public void testGetAndIncrement() {
217	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
218			try {
219			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
220			} catch (RuntimeException ok) {
221			return;
222			}
223	dl	1.1	x = 1;
224	jsr166	1.15	assertEquals(1,a.getAndIncrement(this));
225			assertEquals(2,a.get(this));
226			a.set(this,-2);
227			assertEquals(-2,a.getAndIncrement(this));
228			assertEquals(-1,a.getAndIncrement(this));
229			assertEquals(0,a.getAndIncrement(this));
230			assertEquals(1,a.get(this));
231	dl	1.1	}
232
233	dl	1.3	/**
234	dl	1.4	* addAndGet adds given value to current, and returns current value
235	dl	1.3	*/
236	jsr166	1.12	public void testAddAndGet() {
237	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
238			try {
239			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
240			} catch (RuntimeException ok) {
241			return;
242			}
243	dl	1.1	x = 1;
244	jsr166	1.15	assertEquals(3,a.addAndGet(this,2));
245			assertEquals(3,a.get(this));
246			assertEquals(-1,a.addAndGet(this,-4));
247			assertEquals(-1,a.get(this));
248	dl	1.1	}
249
250	dl	1.3	/**
251	jsr166	1.18	* decrementAndGet decrements and returns current value
252	dl	1.3	*/
253	jsr166	1.12	public void testDecrementAndGet() {
254	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
255			try {
256			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
257			} catch (RuntimeException ok) {
258			return;
259			}
260	dl	1.1	x = 1;
261	jsr166	1.15	assertEquals(0,a.decrementAndGet(this));
262			assertEquals(-1,a.decrementAndGet(this));
263			assertEquals(-2,a.decrementAndGet(this));
264			assertEquals(-2,a.get(this));
265	dl	1.1	}
266
267	dl	1.3	/**
268	dl	1.4	* incrementAndGet increments and returns current value
269	dl	1.3	*/
270	jsr166	1.12	public void testIncrementAndGet() {
271	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
272			try {
273			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
274			} catch (RuntimeException ok) {
275			return;
276			}
277	dl	1.1	x = 1;
278	jsr166	1.15	assertEquals(2,a.incrementAndGet(this));
279			assertEquals(2,a.get(this));
280			a.set(this,-2);
281			assertEquals(-1,a.incrementAndGet(this));
282			assertEquals(0,a.incrementAndGet(this));
283			assertEquals(1,a.incrementAndGet(this));
284			assertEquals(1,a.get(this));
285	dl	1.1	}
286
287			}