NativeSurface.unlockSurface(): Change fail-fast policy to fail safe tolerant

- This policy allows more simple destruction handling w/o validating on the top level.

- Hence 'unlockSurface()' shall not throw any exception.

- 'lockSurface()' keeps unchanges, clarified w/ explicit 'throws' declaration,
  ie will fail-fast.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/awt/JAWTWindow.java b/src/nativewindow/classes/com/jogamp/nativewindow/awt/JAWTWindow.java
index 3437358de..3815189ef 100644
--- a/src/nativewindow/classes/com/jogamp/nativewindow/awt/JAWTWindow.java
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/awt/JAWTWindow.java
@@ -278,7 +278,7 @@ public abstract class JAWTWindow implements NativeWindow, OffscreenLayerSurface,
   }
 
   @Override
-  public final int lockSurface() throws NativeWindowException {
+  public final int lockSurface() throws NativeWindowException, RuntimeException  {
     surfaceLock.lock();
     int res = surfaceLock.getHoldCount() == 1 ? LOCK_SURFACE_NOT_READY : LOCK_SUCCESS; // new lock ?
 
@@ -322,7 +322,9 @@ public abstract class JAWTWindow implements NativeWindow, OffscreenLayerSurface,
     if (surfaceLock.getHoldCount() == 1) {
         final AbstractGraphicsDevice adevice = getGraphicsConfiguration().getScreen().getDevice();
         try {
-            unlockSurfaceImpl();
+            if(null != jawt) {
+                unlockSurfaceImpl();
+            }
         } finally {
             adevice.unlock();
         }