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/publicdomain/zero/1.0/
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

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

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:	1.21
Committed:	Tue May 31 16:16:23 2011 UTC (12 years, 11 months ago) by jsr166
Branch:	MAIN
Changes since 1.20:	+1 -2 lines
Log Message:	use serialClone in serialization tests; update imports
#	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	jsr166	1.19	* http://creativecommons.org/publicdomain/zero/1.0/
5	jsr166	1.10	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9			import junit.framework.*;
10	jsr166	1.21	import java.util.concurrent.atomic.AtomicLongFieldUpdater;
11	dl	1.1
12	dl	1.2	public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
13	dl	1.1	volatile long x = 0;
14	dl	1.4	int z;
15			long w;
16	dl	1.1
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(AtomicLongFieldUpdaterTest.class);
22			}
23
24	dl	1.3	/**
25	dl	1.7	* Construction with non-existent field throws RuntimeException
26	dl	1.3	*/
27	jsr166	1.12	public void testConstructor() {
28	jsr166	1.11	try {
29	jsr166	1.10	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
30	dl	1.1	a = AtomicLongFieldUpdater.newUpdater
31	dl	1.5	(AtomicLongFieldUpdaterTest.class, "y");
32	dl	1.3	shouldThrow();
33	jsr166	1.16	} catch (RuntimeException success) {}
34	dl	1.1	}
35
36	dl	1.3	/**
37	dl	1.4	* construction with field not of given type throws RuntimeException
38	dl	1.3	*/
39	jsr166	1.12	public void testConstructor2() {
40	jsr166	1.11	try {
41	jsr166	1.10	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
42	dl	1.1	a = AtomicLongFieldUpdater.newUpdater
43	dl	1.5	(AtomicLongFieldUpdaterTest.class, "z");
44	dl	1.3	shouldThrow();
45	jsr166	1.16	} catch (RuntimeException success) {}
46	dl	1.1	}
47
48	dl	1.3	/**
49	dl	1.4	* construction with non-volatile field throws RuntimeException
50	dl	1.3	*/
51	jsr166	1.12	public void testConstructor3() {
52	jsr166	1.11	try {
53	jsr166	1.10	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
54	dl	1.1	a = AtomicLongFieldUpdater.newUpdater
55	dl	1.5	(AtomicLongFieldUpdaterTest.class, "w");
56	dl	1.3	shouldThrow();
57	jsr166	1.16	} catch (RuntimeException success) {}
58	dl	1.1	}
59
60	dl	1.3	/**
61	jsr166	1.18	* get returns the last value set or assigned
62	dl	1.3	*/
63	jsr166	1.12	public void testGetSet() {
64	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
65			try {
66			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
67			} catch (RuntimeException ok) {
68			return;
69			}
70	dl	1.1	x = 1;
71	jsr166	1.15	assertEquals(1,a.get(this));
72			a.set(this,2);
73			assertEquals(2,a.get(this));
74			a.set(this,-3);
75			assertEquals(-3,a.get(this));
76	dl	1.1	}
77	dl	1.9
78			/**
79	jsr166	1.18	* get returns the last value lazySet by same thread
80	dl	1.9	*/
81	jsr166	1.12	public void testGetLazySet() {
82	dl	1.9	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
83			try {
84			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
85			} catch (RuntimeException ok) {
86			return;
87			}
88			x = 1;
89	jsr166	1.15	assertEquals(1,a.get(this));
90			a.lazySet(this,2);
91			assertEquals(2,a.get(this));
92			a.lazySet(this,-3);
93			assertEquals(-3,a.get(this));
94	dl	1.9	}
95
96	dl	1.3	/**
97	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
98	dl	1.3	*/
99	jsr166	1.12	public void testCompareAndSet() {
100	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
101			try {
102			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
103			} catch (RuntimeException ok) {
104			return;
105			}
106	dl	1.1	x = 1;
107	jsr166	1.15	assertTrue(a.compareAndSet(this,1,2));
108			assertTrue(a.compareAndSet(this,2,-4));
109			assertEquals(-4,a.get(this));
110			assertFalse(a.compareAndSet(this,-5,7));
111	jsr166	1.17	assertEquals(-4,a.get(this));
112	jsr166	1.15	assertTrue(a.compareAndSet(this,-4,7));
113			assertEquals(7,a.get(this));
114	dl	1.1	}
115
116	dl	1.4	/**
117			* compareAndSet in one thread enables another waiting for value
118			* to succeed
119			*/
120	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws Exception {
121	dl	1.4	x = 1;
122	dl	1.8	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
123			try {
124			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
125			} catch (RuntimeException ok) {
126			return;
127			}
128	dl	1.4
129	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
130			public void realRun() {
131			while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
132			Thread.yield();
133			}});
134	jsr166	1.13
135			t.start();
136			assertTrue(a.compareAndSet(this, 1, 2));
137			t.join(LONG_DELAY_MS);
138			assertFalse(t.isAlive());
139			assertEquals(a.get(this), 3);
140	dl	1.4	}
141
142	dl	1.3	/**
143	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
144	jsr166	1.10	* to expected
145	dl	1.3	*/
146	jsr166	1.12	public void testWeakCompareAndSet() {
147	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
148			try {
149			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
150			} catch (RuntimeException ok) {
151			return;
152			}
153	dl	1.1	x = 1;
154	jsr166	1.15	while (!a.weakCompareAndSet(this,1,2));
155	jsr166	1.11	while (!a.weakCompareAndSet(this,2,-4));
156	jsr166	1.15	assertEquals(-4,a.get(this));
157			while (!a.weakCompareAndSet(this,-4,7));
158			assertEquals(7,a.get(this));
159	dl	1.1	}
160
161	dl	1.3	/**
162	jsr166	1.18	* getAndSet returns previous value and sets to given value
163	dl	1.3	*/
164	jsr166	1.12	public void testGetAndSet() {
165	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
166			try {
167			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
168			} catch (RuntimeException ok) {
169			return;
170			}
171	dl	1.1	x = 1;
172	jsr166	1.15	assertEquals(1,a.getAndSet(this, 0));
173			assertEquals(0,a.getAndSet(this,-10));
174			assertEquals(-10,a.getAndSet(this,1));
175	dl	1.1	}
176
177	dl	1.3	/**
178	dl	1.4	* getAndAdd returns previous value and adds given value
179	dl	1.3	*/
180	jsr166	1.12	public void testGetAndAdd() {
181	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
182			try {
183			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
184			} catch (RuntimeException ok) {
185			return;
186			}
187	dl	1.1	x = 1;
188	jsr166	1.15	assertEquals(1,a.getAndAdd(this,2));
189			assertEquals(3,a.get(this));
190			assertEquals(3,a.getAndAdd(this,-4));
191			assertEquals(-1,a.get(this));
192	dl	1.1	}
193
194	dl	1.3	/**
195	dl	1.4	* getAndDecrement returns previous value and decrements
196	dl	1.3	*/
197	jsr166	1.12	public void testGetAndDecrement() {
198	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
199			try {
200			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
201			} catch (RuntimeException ok) {
202			return;
203			}
204	dl	1.1	x = 1;
205	jsr166	1.15	assertEquals(1,a.getAndDecrement(this));
206			assertEquals(0,a.getAndDecrement(this));
207			assertEquals(-1,a.getAndDecrement(this));
208	dl	1.1	}
209
210	dl	1.3	/**
211	dl	1.4	* getAndIncrement returns previous value and increments
212	dl	1.3	*/
213	jsr166	1.12	public void testGetAndIncrement() {
214	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
215			try {
216			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
217			} catch (RuntimeException ok) {
218			return;
219			}
220	dl	1.1	x = 1;
221	jsr166	1.15	assertEquals(1,a.getAndIncrement(this));
222			assertEquals(2,a.get(this));
223			a.set(this,-2);
224			assertEquals(-2,a.getAndIncrement(this));
225			assertEquals(-1,a.getAndIncrement(this));
226			assertEquals(0,a.getAndIncrement(this));
227			assertEquals(1,a.get(this));
228	dl	1.1	}
229
230	dl	1.3	/**
231	dl	1.4	* addAndGet adds given value to current, and returns current value
232	dl	1.3	*/
233	jsr166	1.12	public void testAddAndGet() {
234	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
235			try {
236			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
237			} catch (RuntimeException ok) {
238			return;
239			}
240	dl	1.1	x = 1;
241	jsr166	1.15	assertEquals(3,a.addAndGet(this,2));
242			assertEquals(3,a.get(this));
243			assertEquals(-1,a.addAndGet(this,-4));
244			assertEquals(-1,a.get(this));
245	dl	1.1	}
246
247	dl	1.3	/**
248	jsr166	1.18	* decrementAndGet decrements and returns current value
249	dl	1.3	*/
250	jsr166	1.12	public void testDecrementAndGet() {
251	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
252			try {
253			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
254			} catch (RuntimeException ok) {
255			return;
256			}
257	dl	1.1	x = 1;
258	jsr166	1.15	assertEquals(0,a.decrementAndGet(this));
259			assertEquals(-1,a.decrementAndGet(this));
260			assertEquals(-2,a.decrementAndGet(this));
261			assertEquals(-2,a.get(this));
262	dl	1.1	}
263
264	dl	1.3	/**
265	dl	1.4	* incrementAndGet increments and returns current value
266	dl	1.3	*/
267	jsr166	1.12	public void testIncrementAndGet() {
268	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
269			try {
270			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
271			} catch (RuntimeException ok) {
272			return;
273			}
274	dl	1.1	x = 1;
275	jsr166	1.15	assertEquals(2,a.incrementAndGet(this));
276			assertEquals(2,a.get(this));
277			a.set(this,-2);
278			assertEquals(-1,a.incrementAndGet(this));
279			assertEquals(0,a.incrementAndGet(this));
280			assertEquals(1,a.incrementAndGet(this));
281			assertEquals(1,a.get(this));
282	dl	1.1	}
283
284			}