17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * 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 * http://creativecommons.org/licenses/publicdomain 32 */ 33 34 /* 35 * @test 36 * @bug 4486658 37 * @compile CancelledFutureLoops.java 38 * @run main/timeout=2000 CancelledFutureLoops 39 * @summary Checks for responsiveness of futures to cancellation. 40 * Runs under the assumption that ITERS computations require more than 41 * TIMEOUT msecs to complete. 42 */ 43 44 import java.util.concurrent.*; 45 import java.util.concurrent.locks.*; 46 import java.util.*; 47 48 public final class CancelledFutureLoops { 49 static final ExecutorService pool = Executors.newCachedThreadPool(); 50 static final LoopHelpers.SimpleRandom rng = new LoopHelpers.SimpleRandom(); 51 static boolean print = false; 52 static final int ITERS = 1000000; 53 static final long TIMEOUT = 100; 54 55 public static void main(String[] args) throws Exception { 56 int maxThreads = 5; 57 if (args.length > 0) 58 maxThreads = Integer.parseInt(args[0]); 59 60 print = true; 61 62 for (int i = 2; i <= maxThreads; i += (i+1) >>> 1) { 63 System.out.print("Threads: " + i); 64 try { 65 new FutureLoop(i).test(); 66 } 67 catch(BrokenBarrierException bb) { 68 // OK; ignore 69 } 70 catch(ExecutionException ee) { 71 // OK; ignore 72 } 73 Thread.sleep(TIMEOUT); 74 } 75 pool.shutdown(); 76 if (! pool.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS)) 77 throw new Error(); 78 } 79 80 static final class FutureLoop implements Callable { 81 private int v = rng.next(); 82 private final ReentrantLock lock = new ReentrantLock(); 83 private final LoopHelpers.BarrierTimer timer = new LoopHelpers.BarrierTimer(); 84 private final CyclicBarrier barrier; 85 private final int nthreads; 86 FutureLoop(int nthreads) { 87 this.nthreads = nthreads; 88 barrier = new CyclicBarrier(nthreads+1, timer); 89 } 90 | 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * 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 * http://creativecommons.org/licenses/publicdomain 32 */ 33 34 /* 35 * @test 36 * @bug 4486658 37 * @compile -source 1.5 CancelledFutureLoops.java 38 * @run main/timeout=2000 CancelledFutureLoops 39 * @summary Checks for responsiveness of futures to cancellation. 40 * Runs under the assumption that ITERS computations require more than 41 * TIMEOUT msecs to complete. 42 */ 43 44 import java.util.concurrent.*; 45 import java.util.concurrent.locks.*; 46 import java.util.*; 47 48 public final class CancelledFutureLoops { 49 static final ExecutorService pool = Executors.newCachedThreadPool(); 50 static final LoopHelpers.SimpleRandom rng = new LoopHelpers.SimpleRandom(); 51 static boolean print = false; 52 static final int ITERS = 1000000; 53 static final long TIMEOUT = 100; 54 55 public static void main(String[] args) throws Exception { 56 int maxThreads = 5; 57 if (args.length > 0) 58 maxThreads = Integer.parseInt(args[0]); 59 60 print = true; 61 62 for (int i = 2; i <= maxThreads; i += (i+1) >>> 1) { 63 System.out.print("Threads: " + i); 64 try { 65 new FutureLoop(i).test(); 66 } 67 catch (BrokenBarrierException bb) { 68 // OK; ignore 69 } 70 catch (ExecutionException ee) { 71 // OK; ignore 72 } 73 Thread.sleep(TIMEOUT); 74 } 75 pool.shutdown(); 76 if (! pool.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS)) 77 throw new Error(); 78 } 79 80 static final class FutureLoop implements Callable { 81 private int v = rng.next(); 82 private final ReentrantLock lock = new ReentrantLock(); 83 private final LoopHelpers.BarrierTimer timer = new LoopHelpers.BarrierTimer(); 84 private final CyclicBarrier barrier; 85 private final int nthreads; 86 FutureLoop(int nthreads) { 87 this.nthreads = nthreads; 88 barrier = new CyclicBarrier(nthreads+1, timer); 89 } 90 |