reviewed X11Lib.XLock/UnlockDisplay() usage:

 - added lock(); try{foo();}finally{unlock();} where missing
 - made sure lock is called outside the try block
 - fixed nesting in situations with two independent locks

2 files changed, 23 insertions, 14 deletions

diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/impl/x11/X11GraphicsConfigurationFactory.java b/src/nativewindow/classes/com/jogamp/nativewindow/impl/x11/X11GraphicsConfigurationFactory.java
index 4ffda2fae..a6f52f3c0 100644
--- a/src/nativewindow/classes/com/jogamp/nativewindow/impl/x11/X11GraphicsConfigurationFactory.java
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/impl/x11/X11GraphicsConfigurationFactory.java
@@ -58,8 +58,8 @@ public class X11GraphicsConfigurationFactory extends GraphicsConfigurationFactor
         int num[] = { -1 };
         long display = screen.getDevice().getHandle();
 
+        X11Lib.XLockDisplay(display);
         try {
-            X11Lib.XLockDisplay(display);
             XVisualInfo[] xvis = X11Lib.XGetVisualInfoCopied(display, X11Lib.VisualIDMask|X11Lib.VisualScreenMask, xvi_temp, num, 0);
 
             if(xvis==null || num[0]<1) {
@@ -90,8 +90,8 @@ public class X11GraphicsConfigurationFactory extends GraphicsConfigurationFactor
         vinfo_template.setC_class(c_class);
         long display = screen.getDevice().getHandle();
 
+        X11Lib.XLockDisplay(display);
         try {
-            X11Lib.XLockDisplay(display);
             XVisualInfo[] vinfos = X11Lib.XGetVisualInfoCopied(display, X11Lib.VisualScreenMask, vinfo_template, num, 0);
             XVisualInfo best=null;
             int rdepth = capabilities.getRedBits() + capabilities.getGreenBits() + capabilities.getBlueBits() + capabilities.getAlphaBits();
diff --git a/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsScreen.java b/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsScreen.java
index 69ace3c52..58b40efe0 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsScreen.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsScreen.java
@@ -57,13 +57,16 @@ public class X11GraphicsScreen extends DefaultGraphicsScreen implements Cloneabl
     /** Creates a new X11GraphicsScreen using a thread local display connection */
     public static AbstractGraphicsScreen createDefault() {
         NativeWindowFactory.getDefaultFactory().getToolkitLock().lock();
-        long display = X11Util.createThreadLocalDefaultDisplay();
         try {
+            long display = X11Util.createThreadLocalDefaultDisplay();
             X11Lib.XLockDisplay(display);
-            int scrnIdx = X11Lib.DefaultScreen(display);
-            return createScreenDevice(display, scrnIdx);
+            try{
+                int scrnIdx = X11Lib.DefaultScreen(display);
+                return createScreenDevice(display, scrnIdx);
+            }finally{
+                X11Lib.XUnlockDisplay(display);
+            }
         } finally {
-            X11Lib.XUnlockDisplay(display);
             NativeWindowFactory.getDefaultFactory().getToolkitLock().unlock();
         }
     }
@@ -71,13 +74,16 @@ public class X11GraphicsScreen extends DefaultGraphicsScreen implements Cloneabl
     public long getDefaultVisualID() {
         // It still could be an AWT hold handle ..
         NativeWindowFactory.getDefaultFactory().getToolkitLock().lock();
-        long display = getDevice().getHandle();
         try {
+            long display = getDevice().getHandle();
             X11Lib.XLockDisplay(display);
-            int scrnIdx = X11Lib.DefaultScreen(display);
-            return X11Lib.DefaultVisualID(display, scrnIdx);
+            try{
+                int scrnIdx = X11Lib.DefaultScreen(display);
+                return X11Lib.DefaultVisualID(display, scrnIdx);
+            }finally{
+                X11Lib.XUnlockDisplay(display);
+            }
         } finally {
-            X11Lib.XUnlockDisplay(display);
             NativeWindowFactory.getDefaultFactory().getToolkitLock().unlock();
         }
     }
@@ -85,14 +91,17 @@ public class X11GraphicsScreen extends DefaultGraphicsScreen implements Cloneabl
     private static int fetchScreen(X11GraphicsDevice device, int screen) {
         // It still could be an AWT hold handle ..
         NativeWindowFactory.getDefaultFactory().getToolkitLock().lock();
-        long display = device.getHandle();
         try {
+            long display = device.getHandle();
             X11Lib.XLockDisplay(display);
-            if(X11Lib.XineramaEnabled(display)) {
-                screen = 0; // Xinerama -> 1 screen
+            try{
+                if(X11Lib.XineramaEnabled(display)) {
+                    screen = 0; // Xinerama -> 1 screen
+                }
+            }finally{
+                X11Lib.XUnlockDisplay(display);
             }
         } finally {
-            X11Lib.XUnlockDisplay(display);
             NativeWindowFactory.getDefaultFactory().getToolkitLock().unlock();
         }
         return screen;