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Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.6 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.32 by jsr166, Mon Nov 9 18:42:41 2015 UTC

#	Line 1 | Line 1
1		/*
2		* 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.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import java.util.concurrent.atomic.*;
10	<	import junit.framework.*;
11	<	import java.util.*;
9	>	import java.util.concurrent.atomic.AtomicLongFieldUpdater;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14		public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
15		volatile long x = 0;
16	<	int z;
16	>	protected volatile long protectedField;
17	>	private volatile long privateField;
18		long w;
19	<
20	<	public static void main(String[] args){
21	<	junit.textui.TestRunner.run(suite());
19	>	float z;
20	>	public static void main(String[] args) {
21	>	main(suite(), args);
22		}
23		public static Test suite() {
24		return new TestSuite(AtomicLongFieldUpdaterTest.class);
25		}
26
27	+	// for testing subclass access
28	+	static class AtomicLongFieldUpdaterTestSubclass extends AtomicLongFieldUpdaterTest {
29	+	public void checkPrivateAccess() {
30	+	try {
31	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
32	+	AtomicLongFieldUpdater.newUpdater
33	+	(AtomicLongFieldUpdaterTest.class, "privateField");
34	+	shouldThrow();
35	+	} catch (RuntimeException success) {
36	+	assertNotNull(success.getCause());
37	+	}
38	+	}
39	+
40	+	public void checkCompareAndSetProtectedSub() {
41	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
42	+	AtomicLongFieldUpdater.newUpdater
43	+	(AtomicLongFieldUpdaterTest.class, "protectedField");
44	+	this.protectedField = 1;
45	+	assertTrue(a.compareAndSet(this, 1, 2));
46	+	assertTrue(a.compareAndSet(this, 2, -4));
47	+	assertEquals(-4, a.get(this));
48	+	assertFalse(a.compareAndSet(this, -5, 7));
49	+	assertEquals(-4, a.get(this));
50	+	assertTrue(a.compareAndSet(this, -4, 7));
51	+	assertEquals(7, a.get(this));
52	+	}
53	+	}
54	+
55	+	static class UnrelatedClass {
56	+	public void checkPackageAccess(AtomicLongFieldUpdaterTest obj) {
57	+	obj.x = 72L;
58	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
59	+	AtomicLongFieldUpdater.newUpdater
60	+	(AtomicLongFieldUpdaterTest.class, "x");
61	+	assertEquals(72L, a.get(obj));
62	+	assertTrue(a.compareAndSet(obj, 72L, 73L));
63	+	assertEquals(73L, a.get(obj));
64	+	}
65	+
66	+	public void checkPrivateAccess(AtomicLongFieldUpdaterTest obj) {
67	+	try {
68	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
69	+	AtomicLongFieldUpdater.newUpdater
70	+	(AtomicLongFieldUpdaterTest.class, "privateField");
71	+	throw new AssertionError("should throw");
72	+	} catch (RuntimeException success) {
73	+	assertNotNull(success.getCause());
74	+	}
75	+	}
76	+	}
77	+
78	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
79	+	return AtomicLongFieldUpdater.newUpdater
80	+	(AtomicLongFieldUpdaterTest.class, fieldName);
81	+	}
82	+
83		/**
84	<	* Contruction with non-existent field throws RuntimeException
84	>	* Construction with non-existent field throws RuntimeException
85		*/
86	<	public void testConstructor(){
87	<	try{
88	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
31	<	a = AtomicLongFieldUpdater.newUpdater
32	<	(AtomicLongFieldUpdaterTest.class, "y");
86	>	public void testConstructor() {
87	>	try {
88	>	updaterFor("y");
89		shouldThrow();
90	+	} catch (RuntimeException success) {
91	+	assertNotNull(success.getCause());
92		}
35	–	catch (RuntimeException rt) {}
93		}
94
95		/**
96	<	* construction with field not of given type throws RuntimeException
96	>	* construction with field not of given type throws IllegalArgumentException
97		*/
98	<	public void testConstructor2(){
99	<	try{
100	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
44	<	a = AtomicLongFieldUpdater.newUpdater
45	<	(AtomicLongFieldUpdaterTest.class, "z");
98	>	public void testConstructor2() {
99	>	try {
100	>	updaterFor("z");
101		shouldThrow();
102	<	}
48	<	catch (RuntimeException rt) {}
102	>	} catch (IllegalArgumentException success) {}
103		}
104
105		/**
106	<	* construction with non-volatile field throws RuntimeException
106	>	* construction with non-volatile field throws IllegalArgumentException
107		*/
108	<	public void testConstructor3(){
109	<	try{
110	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
57	<	a = AtomicLongFieldUpdater.newUpdater
58	<	(AtomicLongFieldUpdaterTest.class, "w");
108	>	public void testConstructor3() {
109	>	try {
110	>	updaterFor("w");
111		shouldThrow();
112	<	}
112	>	} catch (IllegalArgumentException success) {}
113	>	}
114
115	<	catch (RuntimeException rt) {}
115	>	/**
116	>	* construction using private field from subclass throws RuntimeException
117	>	*/
118	>	public void testPrivateFieldInSubclass() {
119	>	AtomicLongFieldUpdaterTestSubclass s =
120	>	new AtomicLongFieldUpdaterTestSubclass();
121	>	s.checkPrivateAccess();
122		}
123
124		/**
125	<	*  get returns the last value set or assigned
125	>	* construction from unrelated class; package access is allowed,
126	>	* private access is not
127		*/
128	<	public void testGetSet(){
129	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
128	>	public void testUnrelatedClassAccess() {
129	>	new UnrelatedClass().checkPackageAccess(this);
130	>	new UnrelatedClass().checkPrivateAccess(this);
131	>	}
132	>
133	>	/**
134	>	* get returns the last value set or assigned
135	>	*/
136	>	public void testGetSet() {
137	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
138	>	a = updaterFor("x");
139		x = 1;
140	<	assertEquals(1,a.get(this));
141	<	a.set(this,2);
142	<	assertEquals(2,a.get(this));
143	<	a.set(this,-3);
144	<	assertEquals(-3,a.get(this));
76	<
140	>	assertEquals(1, a.get(this));
141	>	a.set(this, 2);
142	>	assertEquals(2, a.get(this));
143	>	a.set(this, -3);
144	>	assertEquals(-3, a.get(this));
145		}
146	+
147		/**
148	<	* compareAndSet succeeds in changing value if equal to expected else fails
148	>	* get returns the last value lazySet by same thread
149		*/
150	<	public void testCompareAndSet(){
151	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
150	>	public void testGetLazySet() {
151	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
152	>	a = updaterFor("x");
153		x = 1;
154	<	assertTrue(a.compareAndSet(this,1,2));
155	<	assertTrue(a.compareAndSet(this,2,-4));
156	<	assertEquals(-4,a.get(this));
157	<	assertFalse(a.compareAndSet(this,-5,7));
158	<	assertFalse((7 == a.get(this)));
159	<	assertTrue(a.compareAndSet(this,-4,7));
160	<	assertEquals(7,a.get(this));
154	>	assertEquals(1, a.get(this));
155	>	a.lazySet(this, 2);
156	>	assertEquals(2, a.get(this));
157	>	a.lazySet(this, -3);
158	>	assertEquals(-3, a.get(this));
159	>	}
160	>
161	>	/**
162	>	* compareAndSet succeeds in changing value if equal to expected else fails
163	>	*/
164	>	public void testCompareAndSet() {
165	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
166	>	a = updaterFor("x");
167	>	x = 1;
168	>	assertTrue(a.compareAndSet(this, 1, 2));
169	>	assertTrue(a.compareAndSet(this, 2, -4));
170	>	assertEquals(-4, a.get(this));
171	>	assertFalse(a.compareAndSet(this, -5, 7));
172	>	assertEquals(-4, a.get(this));
173	>	assertTrue(a.compareAndSet(this, -4, 7));
174	>	assertEquals(7, a.get(this));
175		}
176
177	+	/**
178	+	* compareAndSet succeeds in changing protected field value if
179	+	* equal to expected else fails
180	+	*/
181	+	public void testCompareAndSetProtected() {
182	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
183	+	a = updaterFor("protectedField");
184	+	protectedField = 1;
185	+	assertTrue(a.compareAndSet(this, 1, 2));
186	+	assertTrue(a.compareAndSet(this, 2, -4));
187	+	assertEquals(-4, a.get(this));
188	+	assertFalse(a.compareAndSet(this, -5, 7));
189	+	assertEquals(-4, a.get(this));
190	+	assertTrue(a.compareAndSet(this, -4, 7));
191	+	assertEquals(7, a.get(this));
192	+	}
193	+
194	+	/**
195	+	* compareAndSet succeeds in changing protected field value if
196	+	* equal to expected else fails
197	+	*/
198	+	public void testCompareAndSetProtectedInSubclass() {
199	+	AtomicLongFieldUpdaterTestSubclass s =
200	+	new AtomicLongFieldUpdaterTestSubclass();
201	+	s.checkCompareAndSetProtectedSub();
202	+	}
203
204		/**
205		* compareAndSet in one thread enables another waiting for value
206		* to succeed
207		*/
208	<	public void testCompareAndSetInMultipleThreads() {
208	>	public void testCompareAndSetInMultipleThreads() throws Exception {
209		x = 1;
210	<	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
210	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
211	>	a = updaterFor("x");
212
213	<	Thread t = new Thread(new Runnable() {
214	<	public void run() {
215	<	while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
216	<	}});
217	<	try {
218	<	t.start();
219	<	assertTrue(a.compareAndSet(this, 1, 2));
220	<	t.join(LONG_DELAY_MS);
221	<	assertFalse(t.isAlive());
222	<	assertEquals(a.get(this), 3);
223	<	}
113	<	catch(Exception e) {
114	<	unexpectedException();
115	<	}
213	>	Thread t = new Thread(new CheckedRunnable() {
214	>	public void realRun() {
215	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
216	>	Thread.yield();
217	>	}});
218	>
219	>	t.start();
220	>	assertTrue(a.compareAndSet(this, 1, 2));
221	>	t.join(LONG_DELAY_MS);
222	>	assertFalse(t.isAlive());
223	>	assertEquals(3, a.get(this));
224		}
225
226		/**
227		* repeated weakCompareAndSet succeeds in changing value when equal
228	<	* to expected
228	>	* to expected
229		*/
230	<	public void testWeakCompareAndSet(){
231	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
230	>	public void testWeakCompareAndSet() {
231	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
232	>	a = updaterFor("x");
233		x = 1;
234	<	while(!a.weakCompareAndSet(this,1,2));
235	<	while(!a.weakCompareAndSet(this,2,-4));
236	<	assertEquals(-4,a.get(this));
237	<	while(!a.weakCompareAndSet(this,-4,7));
238	<	assertEquals(7,a.get(this));
234	>	do {} while (!a.weakCompareAndSet(this, 1, 2));
235	>	do {} while (!a.weakCompareAndSet(this, 2, -4));
236	>	assertEquals(-4, a.get(this));
237	>	do {} while (!a.weakCompareAndSet(this, -4, 7));
238	>	assertEquals(7, a.get(this));
239		}
240
241		/**
242	<	*  getAndSet returns previous value and sets to given value
242	>	* getAndSet returns previous value and sets to given value
243		*/
244	<	public void testGetAndSet(){
245	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
244	>	public void testGetAndSet() {
245	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
246	>	a = updaterFor("x");
247		x = 1;
248	<	assertEquals(1,a.getAndSet(this, 0));
249	<	assertEquals(0,a.getAndSet(this,-10));
250	<	assertEquals(-10,a.getAndSet(this,1));
248	>	assertEquals(1, a.getAndSet(this, 0));
249	>	assertEquals(0, a.getAndSet(this, -10));
250	>	assertEquals(-10, a.getAndSet(this, 1));
251		}
252
253		/**
254		* getAndAdd returns previous value and adds given value
255		*/
256	<	public void testGetAndAdd(){
257	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
258	<	x = 1;
259	<	assertEquals(1,a.getAndAdd(this,2));
260	<	assertEquals(3,a.get(this));
261	<	assertEquals(3,a.getAndAdd(this,-4));
262	<	assertEquals(-1,a.get(this));
256	>	public void testGetAndAdd() {
257	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
258	>	a = updaterFor("x");
259	>	x = 1;
260	>	assertEquals(1, a.getAndAdd(this, 2));
261	>	assertEquals(3, a.get(this));
262	>	assertEquals(3, a.getAndAdd(this, -4));
263	>	assertEquals(-1, a.get(this));
264		}
265
266		/**
267		* getAndDecrement returns previous value and decrements
268		*/
269	<	public void testGetAndDecrement(){
270	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
271	<	x = 1;
272	<	assertEquals(1,a.getAndDecrement(this));
273	<	assertEquals(0,a.getAndDecrement(this));
274	<	assertEquals(-1,a.getAndDecrement(this));
269	>	public void testGetAndDecrement() {
270	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
271	>	a = updaterFor("x");
272	>	x = 1;
273	>	assertEquals(1, a.getAndDecrement(this));
274	>	assertEquals(0, a.getAndDecrement(this));
275	>	assertEquals(-1, a.getAndDecrement(this));
276		}
277
278		/**
279		* getAndIncrement returns previous value and increments
280		*/
281	<	public void testGetAndIncrement(){
282	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
283	<	x = 1;
284	<	assertEquals(1,a.getAndIncrement(this));
285	<	assertEquals(2,a.get(this));
286	<	a.set(this,-2);
287	<	assertEquals(-2,a.getAndIncrement(this));
288	<	assertEquals(-1,a.getAndIncrement(this));
289	<	assertEquals(0,a.getAndIncrement(this));
290	<	assertEquals(1,a.get(this));
281	>	public void testGetAndIncrement() {
282	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
283	>	a = updaterFor("x");
284	>	x = 1;
285	>	assertEquals(1, a.getAndIncrement(this));
286	>	assertEquals(2, a.get(this));
287	>	a.set(this, -2);
288	>	assertEquals(-2, a.getAndIncrement(this));
289	>	assertEquals(-1, a.getAndIncrement(this));
290	>	assertEquals(0, a.getAndIncrement(this));
291	>	assertEquals(1, a.get(this));
292		}
293
294		/**
295		* addAndGet adds given value to current, and returns current value
296		*/
297	<	public void testAddAndGet(){
298	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
297	>	public void testAddAndGet() {
298	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
299	>	a = updaterFor("x");
300		x = 1;
301	<	assertEquals(3,a.addAndGet(this,2));
302	<	assertEquals(3,a.get(this));
303	<	assertEquals(-1,a.addAndGet(this,-4));
304	<	assertEquals(-1,a.get(this));
301	>	assertEquals(3, a.addAndGet(this, 2));
302	>	assertEquals(3, a.get(this));
303	>	assertEquals(-1, a.addAndGet(this, -4));
304	>	assertEquals(-1, a.get(this));
305		}
306
307		/**
308	<	*  decrementAndGet decrements and returns current value
308	>	* decrementAndGet decrements and returns current value
309		*/
310	<	public void testDecrementAndGet(){
311	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
310	>	public void testDecrementAndGet() {
311	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
312	>	a = updaterFor("x");
313		x = 1;
314	<	assertEquals(0,a.decrementAndGet(this));
315	<	assertEquals(-1,a.decrementAndGet(this));
316	<	assertEquals(-2,a.decrementAndGet(this));
317	<	assertEquals(-2,a.get(this));
314	>	assertEquals(0, a.decrementAndGet(this));
315	>	assertEquals(-1, a.decrementAndGet(this));
316	>	assertEquals(-2, a.decrementAndGet(this));
317	>	assertEquals(-2, a.get(this));
318		}
319
320		/**
321		* incrementAndGet increments and returns current value
322		*/
323	<	public void testIncrementAndGet(){
324	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
325	<	x = 1;
326	<	assertEquals(2,a.incrementAndGet(this));
327	<	assertEquals(2,a.get(this));
328	<	a.set(this,-2);
329	<	assertEquals(-1,a.incrementAndGet(this));
330	<	assertEquals(0,a.incrementAndGet(this));
331	<	assertEquals(1,a.incrementAndGet(this));
332	<	assertEquals(1,a.get(this));
323	>	public void testIncrementAndGet() {
324	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
325	>	a = updaterFor("x");
326	>	x = 1;
327	>	assertEquals(2, a.incrementAndGet(this));
328	>	assertEquals(2, a.get(this));
329	>	a.set(this, -2);
330	>	assertEquals(-1, a.incrementAndGet(this));
331	>	assertEquals(0, a.incrementAndGet(this));
332	>	assertEquals(1, a.incrementAndGet(this));
333	>	assertEquals(1, a.get(this));
334		}
335
336		}

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