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));
        
    }
    /**
     * 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:	1.8
Committed:	Tue Jan 20 20:20:56 2004 UTC (20 years, 3 months ago) by dl
Branch:	MAIN
CVS Tags:	JSR166_PFD
Changes since 1.7:	+66 -11 lines
Log Message:	Don't fail if test harness doesn't have sufficient permissions
#	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			* 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			AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
31			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			AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
44			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			AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
57			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			}
83	dl	1.3	/**
84	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
85	dl	1.3	*/
86	dl	1.1	public void testCompareAndSet(){
87	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
88			try {
89			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
90			} catch (RuntimeException ok) {
91			return;
92			}
93	dl	1.1	x = 1;
94			assertTrue(a.compareAndSet(this,1,2));
95			assertTrue(a.compareAndSet(this,2,-4));
96			assertEquals(-4,a.get(this));
97			assertFalse(a.compareAndSet(this,-5,7));
98			assertFalse((7 == a.get(this)));
99			assertTrue(a.compareAndSet(this,-4,7));
100			assertEquals(7,a.get(this));
101			}
102
103	dl	1.4
104			/**
105			* compareAndSet in one thread enables another waiting for value
106			* to succeed
107			*/
108			public void testCompareAndSetInMultipleThreads() {
109			x = 1;
110	dl	1.8	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
111			try {
112			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
113			} catch (RuntimeException ok) {
114			return;
115			}
116	dl	1.4
117			Thread t = new Thread(new Runnable() {
118			public void run() {
119			while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
120			}});
121			try {
122			t.start();
123			assertTrue(a.compareAndSet(this, 1, 2));
124			t.join(LONG_DELAY_MS);
125			assertFalse(t.isAlive());
126			assertEquals(a.get(this), 3);
127			}
128			catch(Exception e) {
129			unexpectedException();
130			}
131			}
132
133	dl	1.3	/**
134	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
135			* to expected
136	dl	1.3	*/
137	dl	1.1	public void testWeakCompareAndSet(){
138	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
139			try {
140			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
141			} catch (RuntimeException ok) {
142			return;
143			}
144	dl	1.1	x = 1;
145			while(!a.weakCompareAndSet(this,1,2));
146			while(!a.weakCompareAndSet(this,2,-4));
147			assertEquals(-4,a.get(this));
148			while(!a.weakCompareAndSet(this,-4,7));
149			assertEquals(7,a.get(this));
150			}
151
152	dl	1.3	/**
153	dl	1.4	* getAndSet returns previous value and sets to given value
154	dl	1.3	*/
155	dl	1.1	public void testGetAndSet(){
156	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
157			try {
158			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
159			} catch (RuntimeException ok) {
160			return;
161			}
162	dl	1.1	x = 1;
163			assertEquals(1,a.getAndSet(this, 0));
164			assertEquals(0,a.getAndSet(this,-10));
165			assertEquals(-10,a.getAndSet(this,1));
166			}
167
168	dl	1.3	/**
169	dl	1.4	* getAndAdd returns previous value and adds given value
170	dl	1.3	*/
171	dl	1.1	public void testGetAndAdd(){
172	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
173			try {
174			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
175			} catch (RuntimeException ok) {
176			return;
177			}
178	dl	1.1	x = 1;
179			assertEquals(1,a.getAndAdd(this,2));
180			assertEquals(3,a.get(this));
181			assertEquals(3,a.getAndAdd(this,-4));
182			assertEquals(-1,a.get(this));
183			}
184
185	dl	1.3	/**
186	dl	1.4	* getAndDecrement returns previous value and decrements
187	dl	1.3	*/
188	dl	1.1	public void testGetAndDecrement(){
189	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
190			try {
191			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
192			} catch (RuntimeException ok) {
193			return;
194			}
195	dl	1.1	x = 1;
196			assertEquals(1,a.getAndDecrement(this));
197			assertEquals(0,a.getAndDecrement(this));
198			assertEquals(-1,a.getAndDecrement(this));
199			}
200
201	dl	1.3	/**
202	dl	1.4	* getAndIncrement returns previous value and increments
203	dl	1.3	*/
204	dl	1.1	public void testGetAndIncrement(){
205	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
206			try {
207			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
208			} catch (RuntimeException ok) {
209			return;
210			}
211	dl	1.1	x = 1;
212			assertEquals(1,a.getAndIncrement(this));
213			assertEquals(2,a.get(this));
214			a.set(this,-2);
215			assertEquals(-2,a.getAndIncrement(this));
216			assertEquals(-1,a.getAndIncrement(this));
217			assertEquals(0,a.getAndIncrement(this));
218			assertEquals(1,a.get(this));
219			}
220
221	dl	1.3	/**
222	dl	1.4	* addAndGet adds given value to current, and returns current value
223	dl	1.3	*/
224	dl	1.1	public void testAddAndGet(){
225	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
226			try {
227			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
228			} catch (RuntimeException ok) {
229			return;
230			}
231	dl	1.1	x = 1;
232			assertEquals(3,a.addAndGet(this,2));
233			assertEquals(3,a.get(this));
234			assertEquals(-1,a.addAndGet(this,-4));
235			assertEquals(-1,a.get(this));
236			}
237
238	dl	1.3	/**
239	dl	1.4	* decrementAndGet decrements and returns current value
240	dl	1.3	*/
241	dl	1.1	public void testDecrementAndGet(){
242	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
243			try {
244			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
245			} catch (RuntimeException ok) {
246			return;
247			}
248	dl	1.1	x = 1;
249			assertEquals(0,a.decrementAndGet(this));
250			assertEquals(-1,a.decrementAndGet(this));
251			assertEquals(-2,a.decrementAndGet(this));
252			assertEquals(-2,a.get(this));
253			}
254
255	dl	1.3	/**
256	dl	1.4	* incrementAndGet increments and returns current value
257	dl	1.3	*/
258	dl	1.1	public void testIncrementAndGet(){
259	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
260			try {
261			a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
262			} catch (RuntimeException ok) {
263			return;
264			}
265	dl	1.1	x = 1;
266			assertEquals(2,a.incrementAndGet(this));
267			assertEquals(2,a.get(this));
268			a.set(this,-2);
269			assertEquals(-1,a.incrementAndGet(this));
270			assertEquals(0,a.incrementAndGet(this));
271			assertEquals(1,a.incrementAndGet(this));
272			assertEquals(1,a.get(this));
273			}
274
275			}