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() {
        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();
                }});
        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(){
        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:	1.10
Committed:	Mon Nov 2 20:28:31 2009 UTC (14 years, 6 months ago) by jsr166
Branch:	MAIN
Changes since 1.9:	+6 -6 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			public static void main(String[] args){
19			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	dl	1.1	public void testConstructor(){
29			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	dl	1.1	public void testConstructor2(){
42			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	dl	1.1	public void testConstructor3(){
55			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	dl	1.1	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			public void testGetLazySet(){
87			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	dl	1.1	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			public void testCompareAndSetInMultipleThreads() {
128			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			while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
139			}});
140			try {
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			}
147			catch(Exception e) {
148			unexpectedException();
149			}
150			}
151
152	dl	1.3	/**
153	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
154	jsr166	1.10	* to expected
155	dl	1.3	*/
156	dl	1.1	public void testWeakCompareAndSet(){
157	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
158			try {
159			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
160			} catch (RuntimeException ok) {
161			return;
162			}
163	dl	1.1	x = 1;
164			while(!a.weakCompareAndSet(this,1,2));
165			while(!a.weakCompareAndSet(this,2,-4));
166			assertEquals(-4,a.get(this));
167			while(!a.weakCompareAndSet(this,-4,7));
168			assertEquals(7,a.get(this));
169			}
170
171	dl	1.3	/**
172	dl	1.4	* getAndSet returns previous value and sets to given value
173	dl	1.3	*/
174	dl	1.1	public void testGetAndSet(){
175	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
176			try {
177			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
178			} catch (RuntimeException ok) {
179			return;
180			}
181	dl	1.1	x = 1;
182			assertEquals(1,a.getAndSet(this, 0));
183			assertEquals(0,a.getAndSet(this,-10));
184			assertEquals(-10,a.getAndSet(this,1));
185			}
186
187	dl	1.3	/**
188	dl	1.4	* getAndAdd returns previous value and adds given value
189	dl	1.3	*/
190	dl	1.1	public void testGetAndAdd(){
191	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
192			try {
193			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
194			} catch (RuntimeException ok) {
195			return;
196			}
197	dl	1.1	x = 1;
198			assertEquals(1,a.getAndAdd(this,2));
199			assertEquals(3,a.get(this));
200			assertEquals(3,a.getAndAdd(this,-4));
201			assertEquals(-1,a.get(this));
202			}
203
204	dl	1.3	/**
205	dl	1.4	* getAndDecrement returns previous value and decrements
206	dl	1.3	*/
207	dl	1.1	public void testGetAndDecrement(){
208	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
209			try {
210			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
211			} catch (RuntimeException ok) {
212			return;
213			}
214	dl	1.1	x = 1;
215			assertEquals(1,a.getAndDecrement(this));
216			assertEquals(0,a.getAndDecrement(this));
217			assertEquals(-1,a.getAndDecrement(this));
218			}
219
220	dl	1.3	/**
221	dl	1.4	* getAndIncrement returns previous value and increments
222	dl	1.3	*/
223	dl	1.1	public void testGetAndIncrement(){
224	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
225			try {
226			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
227			} catch (RuntimeException ok) {
228			return;
229			}
230	dl	1.1	x = 1;
231			assertEquals(1,a.getAndIncrement(this));
232			assertEquals(2,a.get(this));
233			a.set(this,-2);
234			assertEquals(-2,a.getAndIncrement(this));
235			assertEquals(-1,a.getAndIncrement(this));
236			assertEquals(0,a.getAndIncrement(this));
237			assertEquals(1,a.get(this));
238			}
239
240	dl	1.3	/**
241	dl	1.4	* addAndGet adds given value to current, and returns current value
242	dl	1.3	*/
243	dl	1.1	public void testAddAndGet(){
244	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
245			try {
246			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
247			} catch (RuntimeException ok) {
248			return;
249			}
250	dl	1.1	x = 1;
251			assertEquals(3,a.addAndGet(this,2));
252			assertEquals(3,a.get(this));
253			assertEquals(-1,a.addAndGet(this,-4));
254			assertEquals(-1,a.get(this));
255			}
256
257	dl	1.3	/**
258	dl	1.4	* decrementAndGet decrements and returns current value
259	dl	1.3	*/
260	dl	1.1	public void testDecrementAndGet(){
261	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
262			try {
263			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
264			} catch (RuntimeException ok) {
265			return;
266			}
267	dl	1.1	x = 1;
268			assertEquals(0,a.decrementAndGet(this));
269			assertEquals(-1,a.decrementAndGet(this));
270			assertEquals(-2,a.decrementAndGet(this));
271			assertEquals(-2,a.get(this));
272			}
273
274	dl	1.3	/**
275	dl	1.4	* incrementAndGet increments and returns current value
276	dl	1.3	*/
277	dl	1.1	public void testIncrementAndGet(){
278	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
279			try {
280			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
281			} catch (RuntimeException ok) {
282			return;
283			}
284	dl	1.1	x = 1;
285			assertEquals(2,a.incrementAndGet(this));
286			assertEquals(2,a.get(this));
287			a.set(this,-2);
288			assertEquals(-1,a.incrementAndGet(this));
289			assertEquals(0,a.incrementAndGet(this));
290			assertEquals(1,a.incrementAndGet(this));
291			assertEquals(1,a.get(this));
292			}
293
294			}