GDI: Fix CreateDummyWindow: Use local getModuleHandle(NULL) and synchronize factory method.

1 files changed, 8 insertions, 10 deletions

diff --git a/make/config/nativewindow/win32-CustomJavaCode.java b/make/config/nativewindow/win32-CustomJavaCode.java
index 54a7fa53a..0c1a3a402 100644
--- a/make/config/nativewindow/win32-CustomJavaCode.java
+++ b/make/config/nativewindow/win32-CustomJavaCode.java
@@ -1,28 +1,26 @@
   
-  private static final long hInstance;
-
   static {
     NWJNILibLoader.loadNativeWindow("win32");
-    hInstance = initIDs0();
-    if( 0 == hInstance ) {
+    
+    if( !initIDs0() ) {
         throw new NativeWindowException("GDI: Could not initialized native stub");
     }
   }
 
   public static synchronized void initSingleton() {
   }
-  private static native long initIDs0();
+  private static native boolean initIDs0();
 
-  public static long getModuleHandle() {
-    return hInstance;
-  }
+  private static Object createDummyWindowSync = new Object();
 
   public static long CreateDummyWindow(int x, int y, int width, int height) {
-      return CreateDummyWindow0(getModuleHandle(), x, y, width, height);
+      synchronized(createDummyWindowSync) {
+          return CreateDummyWindow0(x, y, width, height);
+      }
   }
 
   public static Point GetRelativeLocation(long src_win, long dest_win, int src_x, int src_y) {
-    return (Point) GetRelativeLocation0(src_win, dest_win, src_x, src_y);
+      return (Point) GetRelativeLocation0(src_win, dest_win, src_x, src_y);
   }
   private static native Object GetRelativeLocation0(long src_win, long dest_win, int src_x, int src_y);