Woraround for bug 502: X11/NEWT Stalling due to libX11/XCB Multithreading bug (libX11 1.4.2, libXCB 1.7; ubuntu 11.04, ..)

- https://jogamp.org/bugzilla/show_bug.cgi?id=502

- set the boolean property 'nativewindow.x11.mt-bug' to 'true',
  indicating the erroneous libX11/libXCB behavior. This will enable extensive X11 locking even in NEWT.

2 files changed, 43 insertions, 42 deletions

diff --git a/src/nativewindow/classes/javax/media/nativewindow/NativeWindowFactory.java b/src/nativewindow/classes/javax/media/nativewindow/NativeWindowFactory.java
index 51f4568c8..64781e418 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/NativeWindowFactory.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/NativeWindowFactory.java
@@ -91,6 +91,7 @@ public abstract class NativeWindowFactory {
     private static Class  x11ToolkitLockClass;
     private static Constructor x11ToolkitLockConstructor;
     private static boolean isFirstUIActionOnProcess;
+    private static boolean requiresToolkitLock;
 
     /** Creates a new NativeWindowFactory instance. End users do not
         need to call this method. */
@@ -124,6 +125,8 @@ public abstract class NativeWindowFactory {
     static boolean initialized = false;
 
     private static void initNativeImpl(final boolean firstUIActionOnProcess, final ClassLoader cl) {
+        isFirstUIActionOnProcess = firstUIActionOnProcess;
+
         String clazzName = null;
         if( TYPE_X11.equals(nativeWindowingTypePure) ) {
             clazzName = X11UtilClassName;
@@ -134,6 +137,11 @@ public abstract class NativeWindowFactory {
             ReflectionUtil.callStaticMethod(clazzName, "initSingleton",
                                             new Class[] { boolean.class },
                                             new Object[] { new Boolean(firstUIActionOnProcess) }, cl );
+            
+            final Boolean res = (Boolean) ReflectionUtil.callStaticMethod(clazzName, "requiresToolkitLock", null, null, cl);
+            requiresToolkitLock = res.booleanValue();             
+        } else {            
+            requiresToolkitLock = false;
         }
     }
 
@@ -176,9 +184,8 @@ public abstract class NativeWindowFactory {
 
             if(firstUIActionOnProcess) {
                 // X11 initialization before possible AWT initialization
-                initNativeImpl(firstUIActionOnProcess, cl);
+                initNativeImpl(true, cl);
             }
-            isFirstUIActionOnProcess = firstUIActionOnProcess;
             isAWTAvailable = false; // may be set to true below
 
             if( !Debug.getBooleanProperty("java.awt.headless", true, acc) &&
@@ -212,7 +219,7 @@ public abstract class NativeWindowFactory {
             }
             if(!firstUIActionOnProcess) {
                 // X11 initialization after possible AWT initialization
-                initNativeImpl(firstUIActionOnProcess, cl);
+                initNativeImpl(false, cl);
             }
             registeredFactories = Collections.synchronizedMap(new HashMap());
 
@@ -239,6 +246,7 @@ public abstract class NativeWindowFactory {
  
             if(DEBUG) {
                 System.err.println("NativeWindowFactory firstUIActionOnProcess "+firstUIActionOnProcess);
+                System.err.println("NativeWindowFactory requiresToolkitLock "+requiresToolkitLock);
                 System.err.println("NativeWindowFactory isAWTAvailable "+isAWTAvailable+", defaultFactory "+factory);
             }
         }
@@ -250,6 +258,11 @@ public abstract class NativeWindowFactory {
         return isFirstUIActionOnProcess;
     }
 
+    /** @return true if the underlying toolkit requires locking, otherwise false. */
+    public static boolean requiresToolkitLock() {
+        return requiresToolkitLock;
+    }    
+    
     /** @return true if not headless, AWT Component and NativeWindow's AWT part available */
     public static boolean isAWTAvailable() { return isAWTAvailable; }
 
@@ -318,7 +331,7 @@ public abstract class NativeWindowFactory {
      * </ul>
      */
     public static ToolkitLock getDefaultToolkitLock(String type) {
-        if( !isFirstUIActionOnProcess() ) {
+        if( requiresToolkitLock() ) {
             if( TYPE_X11 == type || TYPE_AWT == type && TYPE_X11 == getNativeWindowType(false) ) {
                 if( isAWTAvailable() ) {
                     return getAWTToolkitLock();
@@ -364,7 +377,7 @@ public abstract class NativeWindowFactory {
      * </ul>
      */
     public static ToolkitLock createDefaultToolkitLock(String type, long deviceHandle) {
-        if( !isFirstUIActionOnProcess() ) {
+        if( requiresToolkitLock() ) {
             if( TYPE_X11 == type ) {
                 if( 0== deviceHandle ) {
                     throw new RuntimeException("JAWTUtil.createDefaultToolkitLock() called with NULL device but on X11");
@@ -378,32 +391,6 @@ public abstract class NativeWindowFactory {
         return NativeWindowFactoryImpl.getNullToolkitLock();
     }
 
-    /**
-     * Creates the default {@link ToolkitLock} for <code>type</code> and <code>deviceHandle</code>.
-     * <br>
-     * <ul>
-     *   <li> If {@link #initSingleton(boolean) initSingleton( <b>firstUIActionOnProcess := false</b> )} </li>
-     *   <ul>
-     *     <li>If <b>X11 type</b> </li>
-     *     <ul>
-     *       <li> return {@link jogamp.nativewindow.x11.X11ToolkitLock} </li>
-     *     </ul>
-     *   </ul>
-     *   <li> Otherwise return {@link jogamp.nativewindow.NullToolkitLock} </li>
-     * </ul>
-     */
-    public static ToolkitLock createDefaultToolkitLockNoAWT(String type, long deviceHandle) {
-        if( !isFirstUIActionOnProcess() ) {
-            if( TYPE_X11 == type ) {
-                if( 0== deviceHandle ) {
-                    throw new RuntimeException("JAWTUtil.createDefaultToolkitLockNoAWT() called with NULL device but on X11");
-                }
-                return createX11ToolkitLock(deviceHandle);
-            }
-        }
-        return NativeWindowFactoryImpl.getNullToolkitLock();
-    }
-
     protected static ToolkitLock createX11AWTToolkitLock(long deviceHandle) {
         try {
             return (ToolkitLock) x11JAWTToolkitLockConstructor.newInstance(new Object[]{new Long(deviceHandle)});
diff --git a/src/nativewindow/classes/jogamp/nativewindow/x11/X11Util.java b/src/nativewindow/classes/jogamp/nativewindow/x11/X11Util.java
index 8a6869d91..117184a71 100644
--- a/src/nativewindow/classes/jogamp/nativewindow/x11/X11Util.java
+++ b/src/nativewindow/classes/jogamp/nativewindow/x11/X11Util.java
@@ -51,19 +51,29 @@ import javax.media.nativewindow.util.Point;
  * Contains a thread safe X11 utility to retrieve display connections.
  */
 public class X11Util {
+    /**
+     * 2011/06/14 libX11 1.4.2 and libxcb 1.7 bug 20708 - Multithreading Issues w/ OpenGL, ..
+     *            https://bugs.freedesktop.org/show_bug.cgi?id=20708
+     *            https://jogamp.org/bugzilla/show_bug.cgi?id=502
+     *            Affects: Ubuntu 11.04, OpenSuSE 11, ..
+     * If the property <b>nativewindow.x11.mt-bug</b> is set to true, extensive X11 locking 
+     * is being applied, avoiding X11 multithreading capabilities. 
+     */
+    public static final boolean MULTITHREADING_BUG = Debug.getBooleanProperty("nativewindow.x11.mt-bug", true, AccessController.getContext());
+    public static final boolean XINITTHREADS_ALWAYS_ENABLED = true;
+
     private static final boolean DEBUG = Debug.debug("X11Util");
     private static final boolean TRACE_DISPLAY_LIFECYCLE = Debug.getBooleanProperty("nativewindow.debug.X11Util.TraceDisplayLifecycle", true, AccessController.getContext());
 
     private static volatile String nullDisplayName = null;
-    private static boolean isFirstX11ActionOnProcess = false;
+    private static boolean requiresX11Lock = false;
     private static boolean isInit = false;
 
     private static int setX11ErrorHandlerRecCount = 0;
     private static Object setX11ErrorHandlerLock = new Object();
 
-    public static final boolean XINITTHREADS_ALWAYS_ENABLED = true;
     
-    public static synchronized void initSingleton(boolean firstX11ActionOnProcess) {
+    public static synchronized void initSingleton(final boolean firstX11ActionOnProcess) {
         if(!isInit) {
             NWJNILibLoader.loadNativeWindow("x11");
 
@@ -73,10 +83,14 @@ public class X11Util {
              * ie NEWT (jogamp.newt.x11.X11Display.createNativeImpl()) !!
              */
             initialize0( XINITTHREADS_ALWAYS_ENABLED ? true : firstX11ActionOnProcess );
-            isFirstX11ActionOnProcess = firstX11ActionOnProcess;
 
+            requiresX11Lock = !firstX11ActionOnProcess || MULTITHREADING_BUG;
+            
             if(DEBUG) {
-                System.out.println("X11Util.isFirstX11ActionOnProcess: "+isFirstX11ActionOnProcess);
+                System.out.println("X11Util firstX11ActionOnProcess: "+firstX11ActionOnProcess+
+                                   ", XINITTHREADS_ALWAYS_ENABLED "+XINITTHREADS_ALWAYS_ENABLED+
+                                   ", MULTITHREADING_BUG "+MULTITHREADING_BUG+
+                                   ", requiresX11Lock "+requiresX11Lock); 
             }
             isInit = true;
         }
@@ -101,19 +115,19 @@ public class X11Util {
         }
     }
 
-    public static boolean isFirstX11ActionOnProcess() {
-        return isFirstX11ActionOnProcess;
+    public static boolean requiresToolkitLock() {
+        return requiresX11Lock;
     }
 
     public static void lockDefaultToolkit(long dpyHandle) {
         NativeWindowFactory.getDefaultToolkitLock().lock();
-        if(!isFirstX11ActionOnProcess) {
+        if(requiresX11Lock) {
             X11Util.XLockDisplay(dpyHandle);
         }
     }
 
     public static void unlockDefaultToolkit(long dpyHandle) {
-        if(!isFirstX11ActionOnProcess) {
+        if(requiresX11Lock) {
             X11Util.XUnlockDisplay(dpyHandle);
         }
         NativeWindowFactory.getDefaultToolkitLock().unlock();
@@ -124,11 +138,11 @@ public class X11Util {
             synchronized(X11Util.class) {
                 if(null==nullDisplayName) {
                     NativeWindowFactory.getDefaultToolkitLock().lock();
+                    long dpy = X11Lib.XOpenDisplay(null);
                     try {
-                        long dpy = X11Lib.XOpenDisplay(null);
                         nullDisplayName = X11Lib.XDisplayString(dpy);
-                        X11Lib.XCloseDisplay(dpy);
                     } finally {
+                        X11Lib.XCloseDisplay(dpy);
                         NativeWindowFactory.getDefaultToolkitLock().unlock();
                     }
                     if(DEBUG) {