/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
import org.jikesrvm.scheduler.RVMThread;
/**
* Test native methods that block in native code
*/
class tBlockingThreads {
static final boolean FORCE_GC = true;
static final int NUMBER_OF_WORKERS = 2;
public static native int nativeBlocking(int time);
public static void main(String[] args) {
int time;
System.out.println("Testing threads that block in native code with WORKERS =" + NUMBER_OF_WORKERS);
System.out.println("Attempting to load dynamic library ...");
System.out.println("(the LIBPATH env variable must be set for this directory)");
System.loadLibrary("tBlockingThreads");
if (NUMBER_OF_WORKERS == 0) {
// have main thread make the native blocking call
for (int i=1; i < 5; i++) {
time = 1 * i;
RVMThread.trace("main","calling nativeBlocking for time = ",time);
nativeBlocking(time);
RVMThread.trace("main","returned from nativeBlocking for time = ",time);
}
} else {
// create worker threads which each make repeated native blocking calls
BlockingThreadsWorker[] a = new BlockingThreadsWorker[NUMBER_OF_WORKERS];
for (int wrk = 0; wrk < NUMBER_OF_WORKERS; wrk++) {
if (wrk%2 == 0)
a[wrk] = new BlockingThreadsWorker(1);
else
a[wrk] = new BlockingThreadsWorker(2);
a[wrk].start();
}
for (int i = 0; i < NUMBER_OF_WORKERS; i ++) {
int cntr = 1;
while(!a[i].isFinished) {
try {
Thread.currentThread().sleep(100);
} catch (InterruptedException e) {}
cntr++;
if (cntr%1000 == 0)
RVMThread.trace("main","waiting for worker",i);
if (FORCE_GC) {
System.out.println("\nMain calling System.gc:\n");
System.gc();
}
}
}
System.out.println("Finished");
} // use Worker Threads
} // main
}