ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

root/jsr166/jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.28 by jsr166, Wed Dec 31 19:21:20 2014 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/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;
17		long w;
18
19	<	public static void main(String[] args){
19	>	public static void main(String[] args) {
20		junit.textui.TestRunner.run(suite());
21		}
22		public static Test suite() {
23		return new TestSuite(AtomicLongFieldUpdaterTest.class);
24		}
25
26	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
27	+	return AtomicLongFieldUpdater.newUpdater
28	+	(AtomicLongFieldUpdaterTest.class, fieldName);
29	+	}
30	+
31		/**
32	<	* Contruction with non-existent field throws RuntimeException
32	>	* Construction with non-existent field throws RuntimeException
33		*/
34	<	public void testConstructor(){
35	<	try{
36	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
30	<	a = AtomicLongFieldUpdater.newUpdater
31	<	(getClass(), "y");
34	>	public void testConstructor() {
35	>	try {
36	>	updaterFor("y");
37		shouldThrow();
38	+	} catch (RuntimeException success) {
39	+	assertNotNull(success.getCause());
40		}
34	–	catch (RuntimeException rt) {}
41		}
42
43		/**
44	<	* construction with field not of given type throws RuntimeException
44	>	* construction with field not of given type throws IllegalArgumentException
45		*/
46	<	public void testConstructor2(){
47	<	try{
48	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
43	<	a = AtomicLongFieldUpdater.newUpdater
44	<	(getClass(), "z");
46	>	public void testConstructor2() {
47	>	try {
48	>	updaterFor("z");
49		shouldThrow();
50	<	}
47	<	catch (RuntimeException rt) {}
50	>	} catch (IllegalArgumentException success) {}
51		}
52
53		/**
54	<	* construction with non-volatile field throws RuntimeException
54	>	* construction with non-volatile field throws IllegalArgumentException
55		*/
56	<	public void testConstructor3(){
57	<	try{
58	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
56	<	a = AtomicLongFieldUpdater.newUpdater
57	<	(getClass(), "w");
56	>	public void testConstructor3() {
57	>	try {
58	>	updaterFor("w");
59		shouldThrow();
60	<	}
60	<
61	<	catch (RuntimeException rt) {}
60	>	} catch (IllegalArgumentException success) {}
61		}
62
63		/**
64	<	*  get returns the last value set or assigned
64	>	* get returns the last value set or assigned
65		*/
66	<	public void testGetSet(){
67	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
66	>	public void testGetSet() {
67	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
68	>	a = updaterFor("x");
69		x = 1;
70	<	assertEquals(1,a.get(this));
71	<	a.set(this,2);
72	<	assertEquals(2,a.get(this));
73	<	a.set(this,-3);
74	<	assertEquals(-3,a.get(this));
75	<
70	>	assertEquals(1, a.get(this));
71	>	a.set(this, 2);
72	>	assertEquals(2, a.get(this));
73	>	a.set(this, -3);
74	>	assertEquals(-3, a.get(this));
75		}
76	+
77		/**
78	<	* compareAndSet succeeds in changing value if equal to expected else fails
78	>	* get returns the last value lazySet by same thread
79		*/
80	<	public void testCompareAndSet(){
81	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
80	>	public void testGetLazySet() {
81	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
82	>	a = updaterFor("x");
83		x = 1;
84	<	assertTrue(a.compareAndSet(this,1,2));
85	<	assertTrue(a.compareAndSet(this,2,-4));
86	<	assertEquals(-4,a.get(this));
87	<	assertFalse(a.compareAndSet(this,-5,7));
88	<	assertFalse((7 == a.get(this)));
88	<	assertTrue(a.compareAndSet(this,-4,7));
89	<	assertEquals(7,a.get(this));
84	>	assertEquals(1, a.get(this));
85	>	a.lazySet(this, 2);
86	>	assertEquals(2, a.get(this));
87	>	a.lazySet(this, -3);
88	>	assertEquals(-3, a.get(this));
89		}
90
91	+	/**
92	+	* compareAndSet succeeds in changing value if equal to expected else fails
93	+	*/
94	+	public void testCompareAndSet() {
95	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
96	+	a = updaterFor("x");
97	+	x = 1;
98	+	assertTrue(a.compareAndSet(this, 1, 2));
99	+	assertTrue(a.compareAndSet(this, 2, -4));
100	+	assertEquals(-4, a.get(this));
101	+	assertFalse(a.compareAndSet(this, -5, 7));
102	+	assertEquals(-4, a.get(this));
103	+	assertTrue(a.compareAndSet(this, -4, 7));
104	+	assertEquals(7, a.get(this));
105	+	}
106
107		/**
108		* compareAndSet in one thread enables another waiting for value
109		* to succeed
110		*/
111	<	public void testCompareAndSetInMultipleThreads() {
111	>	public void testCompareAndSetInMultipleThreads() throws Exception {
112		x = 1;
113	<	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
113	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
114	>	a = updaterFor("x");
115
116	<	Thread t = new Thread(new Runnable() {
117	<	public void run() {
118	<	while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
119	<	}});
120	<	try {
121	<	t.start();
122	<	assertTrue(a.compareAndSet(this, 1, 2));
123	<	t.join(LONG_DELAY_MS);
124	<	assertFalse(t.isAlive());
125	<	assertEquals(a.get(this), 3);
126	<	}
112	<	catch(Exception e) {
113	<	unexpectedException();
114	<	}
116	>	Thread t = new Thread(new CheckedRunnable() {
117	>	public void realRun() {
118	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
119	>	Thread.yield();
120	>	}});
121	>
122	>	t.start();
123	>	assertTrue(a.compareAndSet(this, 1, 2));
124	>	t.join(LONG_DELAY_MS);
125	>	assertFalse(t.isAlive());
126	>	assertEquals(3, a.get(this));
127		}
128
129		/**
130		* repeated weakCompareAndSet succeeds in changing value when equal
131	<	* to expected
131	>	* to expected
132		*/
133	<	public void testWeakCompareAndSet(){
134	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
133	>	public void testWeakCompareAndSet() {
134	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
135	>	a = updaterFor("x");
136		x = 1;
137	<	while(!a.weakCompareAndSet(this,1,2));
138	<	while(!a.weakCompareAndSet(this,2,-4));
139	<	assertEquals(-4,a.get(this));
140	<	while(!a.weakCompareAndSet(this,-4,7));
141	<	assertEquals(7,a.get(this));
137	>	do {} while (!a.weakCompareAndSet(this, 1, 2));
138	>	do {} while (!a.weakCompareAndSet(this, 2, -4));
139	>	assertEquals(-4, a.get(this));
140	>	do {} while (!a.weakCompareAndSet(this, -4, 7));
141	>	assertEquals(7, a.get(this));
142		}
143
144		/**
145	<	*  getAndSet returns previous value and sets to given value
145	>	* getAndSet returns previous value and sets to given value
146		*/
147	<	public void testGetAndSet(){
148	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
147	>	public void testGetAndSet() {
148	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
149	>	a = updaterFor("x");
150		x = 1;
151	<	assertEquals(1,a.getAndSet(this, 0));
152	<	assertEquals(0,a.getAndSet(this,-10));
153	<	assertEquals(-10,a.getAndSet(this,1));
151	>	assertEquals(1, a.getAndSet(this, 0));
152	>	assertEquals(0, a.getAndSet(this, -10));
153	>	assertEquals(-10, a.getAndSet(this, 1));
154		}
155
156		/**
157		* getAndAdd returns previous value and adds given value
158		*/
159	<	public void testGetAndAdd(){
160	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
161	<	x = 1;
162	<	assertEquals(1,a.getAndAdd(this,2));
163	<	assertEquals(3,a.get(this));
164	<	assertEquals(3,a.getAndAdd(this,-4));
165	<	assertEquals(-1,a.get(this));
159	>	public void testGetAndAdd() {
160	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
161	>	a = updaterFor("x");
162	>	x = 1;
163	>	assertEquals(1, a.getAndAdd(this, 2));
164	>	assertEquals(3, a.get(this));
165	>	assertEquals(3, a.getAndAdd(this, -4));
166	>	assertEquals(-1, a.get(this));
167		}
168
169		/**
170		* getAndDecrement returns previous value and decrements
171		*/
172	<	public void testGetAndDecrement(){
173	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
174	<	x = 1;
175	<	assertEquals(1,a.getAndDecrement(this));
176	<	assertEquals(0,a.getAndDecrement(this));
177	<	assertEquals(-1,a.getAndDecrement(this));
172	>	public void testGetAndDecrement() {
173	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
174	>	a = updaterFor("x");
175	>	x = 1;
176	>	assertEquals(1, a.getAndDecrement(this));
177	>	assertEquals(0, a.getAndDecrement(this));
178	>	assertEquals(-1, a.getAndDecrement(this));
179		}
180
181		/**
182		* getAndIncrement returns previous value and increments
183		*/
184	<	public void testGetAndIncrement(){
185	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
186	<	x = 1;
187	<	assertEquals(1,a.getAndIncrement(this));
188	<	assertEquals(2,a.get(this));
189	<	a.set(this,-2);
190	<	assertEquals(-2,a.getAndIncrement(this));
191	<	assertEquals(-1,a.getAndIncrement(this));
192	<	assertEquals(0,a.getAndIncrement(this));
193	<	assertEquals(1,a.get(this));
184	>	public void testGetAndIncrement() {
185	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
186	>	a = updaterFor("x");
187	>	x = 1;
188	>	assertEquals(1, a.getAndIncrement(this));
189	>	assertEquals(2, a.get(this));
190	>	a.set(this, -2);
191	>	assertEquals(-2, a.getAndIncrement(this));
192	>	assertEquals(-1, a.getAndIncrement(this));
193	>	assertEquals(0, a.getAndIncrement(this));
194	>	assertEquals(1, a.get(this));
195		}
196
197		/**
198		* addAndGet adds given value to current, and returns current value
199		*/
200	<	public void testAddAndGet(){
201	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
200	>	public void testAddAndGet() {
201	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
202	>	a = updaterFor("x");
203		x = 1;
204	<	assertEquals(3,a.addAndGet(this,2));
205	<	assertEquals(3,a.get(this));
206	<	assertEquals(-1,a.addAndGet(this,-4));
207	<	assertEquals(-1,a.get(this));
204	>	assertEquals(3, a.addAndGet(this, 2));
205	>	assertEquals(3, a.get(this));
206	>	assertEquals(-1, a.addAndGet(this, -4));
207	>	assertEquals(-1, a.get(this));
208		}
209
210		/**
211	<	*  decrementAndGet decrements and returns current value
211	>	* decrementAndGet decrements and returns current value
212		*/
213	<	public void testDecrementAndGet(){
214	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
213	>	public void testDecrementAndGet() {
214	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
215	>	a = updaterFor("x");
216		x = 1;
217	<	assertEquals(0,a.decrementAndGet(this));
218	<	assertEquals(-1,a.decrementAndGet(this));
219	<	assertEquals(-2,a.decrementAndGet(this));
220	<	assertEquals(-2,a.get(this));
217	>	assertEquals(0, a.decrementAndGet(this));
218	>	assertEquals(-1, a.decrementAndGet(this));
219	>	assertEquals(-2, a.decrementAndGet(this));
220	>	assertEquals(-2, a.get(this));
221		}
222
223		/**
224		* incrementAndGet increments and returns current value
225		*/
226	<	public void testIncrementAndGet(){
227	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
228	<	x = 1;
229	<	assertEquals(2,a.incrementAndGet(this));
230	<	assertEquals(2,a.get(this));
231	<	a.set(this,-2);
232	<	assertEquals(-1,a.incrementAndGet(this));
233	<	assertEquals(0,a.incrementAndGet(this));
234	<	assertEquals(1,a.incrementAndGet(this));
235	<	assertEquals(1,a.get(this));
226	>	public void testIncrementAndGet() {
227	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
228	>	a = updaterFor("x");
229	>	x = 1;
230	>	assertEquals(2, a.incrementAndGet(this));
231	>	assertEquals(2, a.get(this));
232	>	a.set(this, -2);
233	>	assertEquals(-1, a.incrementAndGet(this));
234	>	assertEquals(0, a.incrementAndGet(this));
235	>	assertEquals(1, a.incrementAndGet(this));
236	>	assertEquals(1, a.get(this));
237		}
238
239		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines