test/loops/OfferDrainToLoops.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * 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/
 */

/*
 * @test
 * @bug 6805775 6815766
 * @run main OfferDrainToLoops 300
 * @summary Test concurrent offer vs. drainTo
 */

import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
//import jsr166y.*;

@SuppressWarnings({"unchecked", "rawtypes"})
public class OfferDrainToLoops {
    final long testDurationMillisDefault = 10L * 1000L;
    final long testDurationMillis;

    OfferDrainToLoops(String[] args) {
        testDurationMillis = (args.length > 0) ?
            Long.valueOf(args[0]) : testDurationMillisDefault;
    }

    void checkNotContainsNull(Iterable it) {
        for (Object x : it)
            check(x != null);
    }

    void test(String[] args) throws Throwable {
        test(new LinkedBlockingQueue());
        test(new LinkedBlockingQueue(2000));
        test(new LinkedBlockingDeque());
        test(new LinkedBlockingDeque(2000));
        test(new ArrayBlockingQueue(2000));
        test(new LinkedTransferQueue());
    }

    void test(final BlockingQueue q) throws Throwable {
        System.out.println(q.getClass().getSimpleName());
        final long testDurationNanos = testDurationMillis * 1000L * 1000L;
        final long quittingTimeNanos = System.nanoTime() + testDurationNanos;
        final long timeoutMillis = 10L * 1000L;

        /** Poor man's bounded buffer. */
        final AtomicLong approximateCount = new AtomicLong(0L);

        abstract class CheckedThread extends Thread {
            CheckedThread() {
                setDaemon(true);
                start();
            }
            /** Polls for quitting time. */
            protected boolean quittingTime() {
                return System.nanoTime() - quittingTimeNanos > 0;
            }
            /** Polls occasionally for quitting time. */
            protected boolean quittingTime(long i) {
                return (i % 1024) == 0 && quittingTime();
            }
            abstract protected void realRun();
            public void run() {
                try { realRun(); } catch (Throwable t) { unexpected(t); }
            }
        }

        Thread offerer = new CheckedThread() {
            protected void realRun() {
                long c = 0;
                for (long i = 0; ! quittingTime(i); i++) {
                    if (q.offer(c)) {
                        c++;
                        if ((c % 1024) == 0) {
                            approximateCount.getAndAdd(1024);
                            while (approximateCount.get() > 10000)
                                Thread.yield();
                        }
                    } else {
                        Thread.yield();
                    }}}};

        Thread drainer = new CheckedThread() {
            protected void realRun() {
                final ThreadLocalRandom rnd = ThreadLocalRandom.current();
                while (! quittingTime()) {
                    List list = new ArrayList();
                    int n = rnd.nextBoolean() ?
                        q.drainTo(list) :
                        q.drainTo(list, 100);
                    approximateCount.getAndAdd(-n);
                    equal(list.size(), n);
                    for (int j = 0; j < n - 1; j++)
                        equal((Long) list.get(j) + 1L, list.get(j + 1));
                    Thread.yield();
                }}};

        Thread scanner = new CheckedThread() {
            protected void realRun() {
                final ThreadLocalRandom rnd = ThreadLocalRandom.current();
                while (! quittingTime()) {
                    switch (rnd.nextInt(3)) {
                    case 0: checkNotContainsNull(q); break;
                    case 1: q.size(); break;
                    case 2:
                        Long[] a = (Long[]) q.toArray(new Long[0]);
                        int n = a.length;
                        for (int j = 0; j < n - 1; j++) {
                            check(a[j] < a[j+1]);
                            check(a[j] != null);
                        }
                        break;
                    }
                    Thread.yield();
                }}};

        for (Thread thread : new Thread[] { offerer, drainer, scanner }) {
            thread.join(timeoutMillis + testDurationMillis);
            check(! thread.isAlive());
        }
    }

    //--------------------- Infrastructure ---------------------------
    volatile int passed = 0, failed = 0;
    void pass() {passed++;}
    void fail() {failed++; Thread.dumpStack();}
    void fail(String msg) {System.err.println(msg); fail();}
    void unexpected(Throwable t) {failed++; t.printStackTrace();}
    void check(boolean cond) {if (cond) pass(); else fail();}
    void equal(Object x, Object y) {
        if (x == null ? y == null : x.equals(y)) pass();
        else fail(x + " not equal to " + y);}
    public static void main(String[] args) throws Throwable {
        new OfferDrainToLoops(args).instanceMain(args);}
    public void instanceMain(String[] args) throws Throwable {
        try {test(args);} catch (Throwable t) {unexpected(t);}
        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
        if (failed > 0) throw new AssertionError("Some tests failed");}
}
Revision:	1.2
Committed:	Tue Mar 15 19:47:05 2011 UTC (13 years, 2 months ago) by jsr166
Branch:	MAIN
CVS Tags:	release-1_7_0
Changes since 1.1:	+1 -1 lines
Log Message:	Update Creative Commons license URL in legal notices
#	User	Rev	Content
1	dl	1.1	/*
2			* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3			*
4			* This code is free software; you can redistribute it and/or modify it
5			* under the terms of the GNU General Public License version 2 only, as
6			* published by the Free Software Foundation.
7			*
8			* This code is distributed in the hope that it will be useful, but WITHOUT
9			* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10			* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11			* version 2 for more details (a copy is included in the LICENSE file that
12			* accompanied this code).
13			*
14			* You should have received a copy of the GNU General Public License version
15			* 2 along with this work; if not, write to the Free Software Foundation,
16			* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17			*
18			* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
19			* CA 95054 USA or visit www.sun.com if you need additional information or
20			* have any questions.
21			*/
22
23			/*
24			* This file is available under and governed by the GNU General Public
25			* License version 2 only, as published by the Free Software Foundation.
26			* However, the following notice accompanied the original version of this
27			* file:
28			*
29			* Written by Doug Lea with assistance from members of JCP JSR-166
30			* Expert Group and released to the public domain, as explained at
31	jsr166	1.2	* http://creativecommons.org/publicdomain/zero/1.0/
32	dl	1.1	*/
33
34			/*
35			* @test
36			* @bug 6805775 6815766
37			* @run main OfferDrainToLoops 300
38			* @summary Test concurrent offer vs. drainTo
39			*/
40
41			import java.util.*;
42			import java.util.concurrent.*;
43			import java.util.concurrent.atomic.*;
44			//import jsr166y.*;
45
46			@SuppressWarnings({"unchecked", "rawtypes"})
47			public class OfferDrainToLoops {
48			final long testDurationMillisDefault = 10L * 1000L;
49			final long testDurationMillis;
50
51			OfferDrainToLoops(String[] args) {
52			testDurationMillis = (args.length > 0) ?
53			Long.valueOf(args[0]) : testDurationMillisDefault;
54			}
55
56			void checkNotContainsNull(Iterable it) {
57			for (Object x : it)
58			check(x != null);
59			}
60
61			void test(String[] args) throws Throwable {
62			test(new LinkedBlockingQueue());
63			test(new LinkedBlockingQueue(2000));
64			test(new LinkedBlockingDeque());
65			test(new LinkedBlockingDeque(2000));
66			test(new ArrayBlockingQueue(2000));
67			test(new LinkedTransferQueue());
68			}
69
70			void test(final BlockingQueue q) throws Throwable {
71			System.out.println(q.getClass().getSimpleName());
72			final long testDurationNanos = testDurationMillis * 1000L * 1000L;
73			final long quittingTimeNanos = System.nanoTime() + testDurationNanos;
74			final long timeoutMillis = 10L * 1000L;
75
76			/** Poor man's bounded buffer. */
77			final AtomicLong approximateCount = new AtomicLong(0L);
78
79			abstract class CheckedThread extends Thread {
80			CheckedThread() {
81			setDaemon(true);
82			start();
83			}
84			/** Polls for quitting time. */
85			protected boolean quittingTime() {
86			return System.nanoTime() - quittingTimeNanos > 0;
87			}
88			/** Polls occasionally for quitting time. */
89			protected boolean quittingTime(long i) {
90			return (i % 1024) == 0 && quittingTime();
91			}
92			abstract protected void realRun();
93			public void run() {
94			try { realRun(); } catch (Throwable t) { unexpected(t); }
95			}
96			}
97
98			Thread offerer = new CheckedThread() {
99			protected void realRun() {
100			long c = 0;
101			for (long i = 0; ! quittingTime(i); i++) {
102			if (q.offer(c)) {
103			c++;
104			if ((c % 1024) == 0) {
105			approximateCount.getAndAdd(1024);
106			while (approximateCount.get() > 10000)
107			Thread.yield();
108			}
109			} else {
110			Thread.yield();
111			}}}};
112
113			Thread drainer = new CheckedThread() {
114			protected void realRun() {
115			final ThreadLocalRandom rnd = ThreadLocalRandom.current();
116			while (! quittingTime()) {
117			List list = new ArrayList();
118			int n = rnd.nextBoolean() ?
119			q.drainTo(list) :
120			q.drainTo(list, 100);
121			approximateCount.getAndAdd(-n);
122			equal(list.size(), n);
123			for (int j = 0; j < n - 1; j++)
124			equal((Long) list.get(j) + 1L, list.get(j + 1));
125			Thread.yield();
126			}}};
127
128			Thread scanner = new CheckedThread() {
129			protected void realRun() {
130			final ThreadLocalRandom rnd = ThreadLocalRandom.current();
131			while (! quittingTime()) {
132			switch (rnd.nextInt(3)) {
133			case 0: checkNotContainsNull(q); break;
134			case 1: q.size(); break;
135			case 2:
136			Long[] a = (Long[]) q.toArray(new Long[0]);
137			int n = a.length;
138			for (int j = 0; j < n - 1; j++) {
139			check(a[j] < a[j+1]);
140			check(a[j] != null);
141			}
142			break;
143			}
144			Thread.yield();
145			}}};
146
147			for (Thread thread : new Thread[] { offerer, drainer, scanner }) {
148			thread.join(timeoutMillis + testDurationMillis);
149			check(! thread.isAlive());
150			}
151			}
152
153			//--------------------- Infrastructure ---------------------------
154			volatile int passed = 0, failed = 0;
155			void pass() {passed++;}
156			void fail() {failed++; Thread.dumpStack();}
157			void fail(String msg) {System.err.println(msg); fail();}
158			void unexpected(Throwable t) {failed++; t.printStackTrace();}
159			void check(boolean cond) {if (cond) pass(); else fail();}
160			void equal(Object x, Object y) {
161			if (x == null ? y == null : x.equals(y)) pass();
162			else fail(x + " not equal to " + y);}
163			public static void main(String[] args) throws Throwable {
164			new OfferDrainToLoops(args).instanceMain(args);}
165			public void instanceMain(String[] args) throws Throwable {
166			try {test(args);} catch (Throwable t) {unexpected(t);}
167			System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
168			if (failed > 0) throw new AssertionError("Some tests failed");}
169			}