Simplify NEWT EDTUtil invoke: To start EDT Runnable maybe null - start EDT even if on EDT thread.

DEBUG: Name EDTUtil impl, e.g. Default, AWT and SWT

3 files changed, 19 insertions, 23 deletions

diff --git a/src/newt/classes/com/jogamp/newt/Display.java b/src/newt/classes/com/jogamp/newt/Display.java
index e97dec88d..4c263a195 100644
--- a/src/newt/classes/com/jogamp/newt/Display.java
+++ b/src/newt/classes/com/jogamp/newt/Display.java
@@ -165,11 +165,11 @@ public abstract class Display {
      * <code>null</code> is returned and no change is being made.
      * </p>
      * <p>
-     * Note that <code>newEDTUtil</code> will not be started if not done so already,
-     * to do so you may issue {@link EDTUtil#invoke(boolean, Runnable) invoke} 
+     * Note that <code>newEDTUtil</code> will not be started by this method.
+     * To do so you may issue {@link EDTUtil#invoke(boolean, Runnable) invoke} 
      * on the new EDTUtil:
      * <pre>
-     *          newEDTUtil.invoke(true, new Runnable() { public void run() { } } );
+     *          newEDTUtil.invoke(true, null);
      * </pre>
      * </p>
      */
diff --git a/src/newt/classes/com/jogamp/newt/swt/SWTEDTUtil.java b/src/newt/classes/com/jogamp/newt/swt/SWTEDTUtil.java
index 42e1c9be5..2203d744a 100644
--- a/src/newt/classes/com/jogamp/newt/swt/SWTEDTUtil.java
+++ b/src/newt/classes/com/jogamp/newt/swt/SWTEDTUtil.java
@@ -27,8 +27,6 @@
  */
 package com.jogamp.newt.swt;
 
-import java.awt.EventQueue;
-
 import javax.media.nativewindow.NativeWindowException;
 
 import jogamp.newt.Debug;
@@ -83,7 +81,7 @@ public class SWTEDTUtil implements EDTUtil {
         synchronized(edtLock) { 
             waitUntilStopped();
             if(DEBUG) {
-                System.err.println(Thread.currentThread()+": EDT reset - edt: "+nedt);
+                System.err.println(Thread.currentThread()+": SWT-EDT reset - edt: "+nedt);
             }
             this.nedt = new NewtEventDispatchThread(threadGroup, name);
             this.nedt.setDaemon(true); // don't stop JVM from shutdown ..
@@ -92,13 +90,13 @@ public class SWTEDTUtil implements EDTUtil {
 
     private final void startImpl() {
         if(nedt.isAlive()) {
-            throw new RuntimeException("EDT Thread.isAlive(): true, isRunning: "+nedt.isRunning()+", edt: "+nedt);
+            throw new RuntimeException("SWT-EDT Thread.isAlive(): true, isRunning: "+nedt.isRunning()+", edt: "+nedt);
         }
         start_iter++;
         nedt.setName(name+start_iter);
         nedt.shouldStop = false;
         if(DEBUG) {
-            System.err.println(Thread.currentThread()+": EDT START - edt: "+nedt);
+            System.err.println(Thread.currentThread()+": SWT-EDT START - edt: "+nedt);
             // Thread.dumpStack();
         }
         nedt.start();
@@ -136,9 +134,6 @@ public class SWTEDTUtil implements EDTUtil {
     }
     
     private void invokeImpl(boolean wait, Runnable task, boolean stop) {
-        if(task == null) {
-            throw new RuntimeException("Null Runnable");
-        }
         Throwable throwable = null;
         RunnableTask rTask = null;
         Object rTaskLock = new Object();
@@ -147,7 +142,7 @@ public class SWTEDTUtil implements EDTUtil {
                 if( nedt.shouldStop ) {
                     // drop task ..
                     if(DEBUG) {
-                        System.err.println("Warning: EDT about (1) to stop, won't enqueue new task: "+nedt);
+                        System.err.println(Thread.currentThread()+": Warning: SWT-EDT about (1) to stop, won't enqueue new task: "+nedt);
                         Thread.dumpStack();
                     }
                     return; 
@@ -157,20 +152,21 @@ public class SWTEDTUtil implements EDTUtil {
                 if(stop) {
                     nedt.shouldStop = true;
                     if(DEBUG) {
-                        System.err.println(Thread.currentThread()+": EDT signal STOP (on edt: "+isCurrentThreadEDT()+") - "+nedt);
+                        System.err.println(Thread.currentThread()+": SWT-EDT signal STOP (on edt: "+isCurrentThreadEDT()+") - "+nedt);
                         // Thread.dumpStack();
                     }
+                } else if( !nedt.isRunning() ) {
+                    // start if should not stop && not started yet
+                    startImpl();
                 }
-                if( isCurrentThreadEDT() ) {
+                if( null == task ) {
+                    wait = false;
+                } else if( isCurrentThreadEDT() ) {
                     task.run();
                     wait = false; // running in same thread (EDT) -> no wait
                 } else if( swtDisplay.isDisposed() ) {
                     wait = false; // drop task, SWT disposed 
                 } else {
-                    // start if should not stop && not started yet                    
-                    if( !stop && !nedt.isRunning() ) {
-                        startImpl();
-                    }
                     rTask = new RunnableTask(task,
                                              wait ? rTaskLock : null,
                                              true /* always catch and report Exceptions, don't disturb EDT */);
@@ -255,7 +251,7 @@ public class SWTEDTUtil implements EDTUtil {
         @Override
         final public void run() {
             if(DEBUG) {
-                System.err.println(getName()+": EDT run() START "+ getName());
+                System.err.println(getName()+": SWT-EDT run() START "+ getName());
             }
             RuntimeException error = null;
             try {
@@ -289,11 +285,11 @@ public class SWTEDTUtil implements EDTUtil {
                 if(t instanceof RuntimeException) {
                     error = (RuntimeException) t;
                 } else {
-                    error = new RuntimeException("Within EDT", t);
+                    error = new RuntimeException("Within SWT-EDT", t);
                 }
             } finally {
                 if(DEBUG) {
-                    System.err.println(getName()+": EDT run() END "+ getName()+", "+error); 
+                    System.err.println(getName()+": SWT-EDT run() END "+ getName()+", "+error); 
                 }
                 synchronized(edtLock) {
                     isRunning = !shouldStop;
@@ -302,7 +298,7 @@ public class SWTEDTUtil implements EDTUtil {
                     }
                 }
                 if(DEBUG) {
-                    System.err.println(getName()+": EDT run() EXIT "+ getName()+", exception: "+error);
+                    System.err.println(getName()+": SWT-EDT run() EXIT "+ getName()+", exception: "+error);
                 }
                 if(null!=error) {
                     throw error;
diff --git a/src/newt/classes/com/jogamp/newt/util/EDTUtil.java b/src/newt/classes/com/jogamp/newt/util/EDTUtil.java
index 7e19d9de5..293e13592 100644
--- a/src/newt/classes/com/jogamp/newt/util/EDTUtil.java
+++ b/src/newt/classes/com/jogamp/newt/util/EDTUtil.java
@@ -125,7 +125,7 @@ public interface EDTUtil {
     public void invokeStop(Runnable finalTask);
 
     /** 
-     * Shall start the thread if not running.<br>
+     * Shall start the thread if not running, <code>task</code> maybe null for this purpose.<br>
      * Append task to the EDT task queue.<br>
      * Wait until execution is finished if <code>wait == true</code>.<br>
      * Can be issued from within EDT, ie from within an enqueued task.<br>