Name: dsC58869 Date: 07/30/98



The java.awt.MediaTracker methods waitForAll() and checkAll()
hang up VM under concurrent execution.

==== Here is the test demonstrating the bug ====

/* The test creates MediaTracker and starts thread that tries to check
image loading. Then it calls method waitForAll() method to load images.
*/

import java.awt.*;
import java.net.*;

public class MediaTest002 extends Thread {

  MediaTracker tracker;
  Image[] image;

  public static void main (String[] args) {
    Canvas c = new Canvas();
    MediaTest002 test = new MediaTest002();
    test.start();
    System.out.println("wait");
    test.WAIT();
    System.out.println("wait done");
    System.exit(0);
  }

  public MediaTest002 () {
    Canvas c = new Canvas();
    tracker = new MediaTracker(c);
    
    String[] imagesName = {"im0.gif"};

    try {
      image = createImages(imagesName);
    } catch (MalformedURLException mue) {
    }
    for (int i = 0 ;i < image.length;i++) {
      tracker.addImage(image[i], i);
    }
  }

  public void WAIT () {
    try {
      tracker.waitForAll();
    } catch (Exception e) {
      System.out.println(e);
    }
  }
  public int getStatus() {
    return tracker.statusAll(false);
  }
  public void run() {
    while(!tracker.checkAll()) {
    }
  }

  public Image[] createImages(String[] images) throws MalformedURLException {
    Image[] ret = new Image[images.length];
    for(int i = 0; i < images.length; i++) {
      ret[i] = Toolkit.getDefaultToolkit().getImage(new URL("file:///home/sda/temp/tests/" + "images/" + images[i]));
    }
    return ret;
  }

}

<sda@spear(pts/10).331> java MediaTest002
Font specified in font.properties not found [-monotype-arial-bold-r-normal-bold-*-%d-*-*-p-*-iso8859-5]
Font specified in font.properties not found [-monotype-courier-regular-i-normal-italic-*-%d-*-*-m-*-iso8859-5]
Font specified in font.properties not found [-b&h-lucida sans typewriter-medium-r-normal-sans-*-%d-*-*-m-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans-medium-r-normal-sans-*-%d-*-*-p-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida sans-medium-i-normal-sans-*-%d-*-*-p-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida-bold-r-normal-bold sans-*-%d-*-*-p-*-iso8859-5]
Font specified in font.properties not found [-b&h-lucida sans typewriter-medium-r-normal-sans-*-%d-*-*-m-*-iso8859-1]
Font specified in font.properties not found [-monotype-arial-regular-i-normal-italic-*-%d-*-*-p-*-iso8859-5]
Font specified in font.properties not found [-monotype-arial-regular-i-normal-italic-*-%d-*-*-p-*-iso8859-5]
Font specified in font.properties not found [-b&h-lucida sans typewriter-bold-r-normal-sans-*-%d-*-*-m-*-iso8859-1]
Font specified in font.properties not found [-linotype-times-medium-r-normal--*-%d-*-*-p-*-iso8859-1]
Font specified in font.properties not found [-b&h-lucida-bold-r-normal-bold sans-*-%d-*-*-p-0-iso8859-5]
wait
^C<sda@spear(pts/10).332>

======================================================================
 Justification:
The methods should work properly

======================================================================