FYI: backport more async X error fixes from GNU Classpath

[Thomas Fitzsimmons <fitzsim at redhat dot com>]

Hi,

I backported this patch from GNU Classpath to trunk and 
redhat/gcc-4_1-branch.

Tom

2007-04-04  Francis Kung  <fkung@redhat.com>

        * gnu/java/awt/peer/gtk/ComponentGraphics.java
        (cairoDrawGlyphVector): Removed method.
        (cairoSetFont): Removed method.
        (disposeNative): Removed method.
        * native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoGraphics2D.c

(Java_gnu_java_awt_peer_gtk_CairoGraphics2D_cairoDrawGlyphVector): Added
        locking.
        (Java_gnu_java_awt_peer_gtk_CairoGraphics2D_cairoSetFont): 
Added locking.
        (Java_gnu_java_awt_peer_gtk_CairoGraphics2D_disposeNative): 
Added locking.
Index: classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoGraphics2D.c
===================================================================
--- classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoGraphics2D.c	(revision 124226)
+++ classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoGraphics2D.c	(working copy)
@@ -87,7 +87,11 @@
     return;
 
   if (gr->cr)
-    cairo_destroy (gr->cr);
+    {
+      gdk_threads_enter();
+      cairo_destroy (gr->cr);
+      gdk_threads_leave();
+    }
 
   if (gr->pattern)
     cairo_pattern_destroy (gr->pattern);
@@ -343,9 +347,11 @@
   (*env)->ReleaseFloatArrayElements (env, java_positions, native_positions, 0);
   (*env)->ReleaseIntArrayElements (env, java_codes, native_codes, 0);
 
+  gdk_threads_enter ();
   pango_fc_font_lock_face( (PangoFcFont *)pfont->font );
   cairo_show_glyphs (gr->cr, glyphs, n);
   pango_fc_font_unlock_face( (PangoFcFont *)pfont->font );
+  gdk_threads_leave ();
 
   g_free(glyphs);
 }
@@ -367,6 +373,7 @@
   pfont = (struct peerfont *)NSA_GET_FONT_PTR (env, font);
   g_assert (pfont != NULL);
 
+  gdk_threads_enter();
   face = pango_fc_font_lock_face( (PangoFcFont *)pfont->font );
   g_assert (face != NULL);
 
@@ -380,6 +387,7 @@
                        
   cairo_font_face_destroy (ft);
   pango_fc_font_unlock_face((PangoFcFont *)pfont->font);
+  gdk_threads_leave();
 }
 
 JNIEXPORT void JNICALL
Index: classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java
===================================================================
--- classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java	(revision 124226)
+++ classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java	(working copy)
@@ -544,6 +544,17 @@
    * methods ends up being called, we will deadlock.  The lock is only reentrant
    * when called via our lock() method. 
    */
+  
+  /* These methods are already locked in the superclass CairoGraphics2D
+   * so they do not need to be overridden:
+   * 
+   * public void disposeNative
+   *
+   * protected void cairoDrawGlyphVector
+   * 
+   * protected void cairoSetFont
+   */
+  
   @Override
   protected long init(long pointer)
   {
@@ -563,20 +574,6 @@
   }
   
   @Override
-  public void disposeNative(long pointer)
-  {
-    try
-    {
-      lock();
-      super.disposeNative(pointer);
-    }
-    finally
-    {
-      unlock();
-    }
-  }
-  
-  @Override
   protected void drawPixels(long pointer, int[] pixels, int w, int h,
                             int stride, double[] i2u, double alpha,
                             int interpolation)
@@ -728,36 +725,6 @@
   }
   
   @Override
-  protected void cairoDrawGlyphVector(long pointer, GdkFontPeer font,
-                                      float x, float y, int n,
-                                      int[] codes, float[] positions)
-  {
-    try
-    {
-      lock();
-      super.cairoDrawGlyphVector(pointer, font, x, y, n, codes, positions);
-    }
-    finally
-    {
-      unlock();
-    }
-  }
-  
-  @Override
-  protected void cairoSetFont(long pointer, GdkFontPeer font)
-  {
-    try
-    {
-      lock();
-      super.cairoSetFont(pointer, font);
-    }
-    finally
-    {
-      unlock();
-    }
-  }
-  
-  @Override
   protected void cairoRectangle(long pointer, double x, double y,
                                 double width, double height)
   {
Index: classpath/lib/gnu/java/awt/peer/gtk/ComponentGraphics.class
===================================================================
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