-// Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
+// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
package org.xwt;
import java.util.*;
/** Implements cooperative multitasking */
public class Scheduler {
- // FIXME: prepending events messes with keysate -- make a "no re-ordering" invariant?
-
// Public API Exposed to org.xwt /////////////////////////////////////////////////
private static Scheduler singleton;
/** adds a task to the back of the queue */
public static void add(Task t) { singleton.runnable.append(t); }
- /** adds a task to the front of the queue (guaranteed to run next) */
- public static void addAtFront(Task t) { singleton.runnable.prepend(t); }
-
public static void init() { if (singleton == null) (singleton = Platform.getScheduler()).run(); }
- private static Task current = null;
- public static Task current() { return current; }
+ private static Task currentTask = null;
+ public static Task current() { return currentTask; }
/** synchronizd so that we can safely call it from an event-delivery thread, in-context */
private static volatile boolean rendering = false;
protected static Queue runnable = new Queue(50);
public void defaultRun() {
- while(true) {
- current = (Task)runnable.remove(true);
+ try {while(true) {
+ currentTask = (Task)runnable.remove(true);
try {
synchronized(this) {
for(int i=0; i<Surface.allSurfaces.size(); i++) {
Surface s = (Surface)Surface.allSurfaces.elementAt(i);
- if (current instanceof JSFunction) {
+ if (currentTask instanceof JS) {
s._mousex = Integer.MAX_VALUE;
s._mousey = Integer.MAX_VALUE;
} else {
s._mousey = s.mousey;
}
}
- current.perform();
+ currentTask.perform();
}
renderAll();
} catch (JSExn e) {
Log.info(Scheduler.class, "a JavaScript thread spawned with xwt.thread() threw an exception:");
- Log.info(Scheduler.class, e);
+ Log.info(Scheduler.class, "JS Exception: " + e.getObject() + "\n" + e.backtrace());
+ Log.info(Scheduler.class,e);
} catch (Exception e) {
Log.info(Scheduler.class, "a Task threw an exception which was caught by the scheduler:");
Log.info(Scheduler.class, e);
}
// if an Error is thrown it will cause the engine to quit
+} } catch (Throwable t) {
+ t.printStackTrace();
}
}
}