From 30bcaa966d6b00f1630609a78db18dee683cc43d Mon Sep 17 00:00:00 2001
From: Kristian Høgsberg <krh@redhat.com>
Date: Thu, 25 Oct 2007 18:48:06 -0400
Subject: Make glx destroy path handle cases where the X window goes away
 first.

---
 GL/glx/glxdri.c | 19 ++++++++++++++-----
 GL/glx/glxext.c |  2 ++
 2 files changed, 16 insertions(+), 5 deletions(-)

(limited to 'GL')

diff --git a/GL/glx/glxdri.c b/GL/glx/glxdri.c
index 3688d50a8..5c45cd190 100644
--- a/GL/glx/glxdri.c
+++ b/GL/glx/glxdri.c
@@ -185,10 +185,14 @@ __glXDRIdrawableDestroy(__GLXdrawable *drawable)
 
     (*private->driDrawable.destroyDrawable)(&private->driDrawable);
 
-    __glXenterServer(GL_FALSE);
-    DRIDestroyDrawable(drawable->pDraw->pScreen,
-		       serverClient, drawable->pDraw);
-    __glXleaveServer(GL_FALSE);
+    /* If the X window was destroyed, the dri DestroyWindow hook will
+     * aready have taken care of this, so only call if pDraw isn't NULL. */
+    if (drawable->pDraw != NULL) {
+	    __glXenterServer(GL_FALSE);
+	    DRIDestroyDrawable(drawable->pDraw->pScreen,
+			       serverClient, drawable->pDraw);
+	    __glXleaveServer(GL_FALSE);
+    }
 
     xfree(private);
 }
@@ -668,11 +672,16 @@ getDrawableInfo(__DRIdrawable *driDrawable,
 {
     __GLXDRIdrawable *drawable = containerOf(driDrawable,
 					     __GLXDRIdrawable, driDrawable);
-    ScreenPtr pScreen = drawable->base.pDraw->pScreen;
+    ScreenPtr pScreen;
     drm_clip_rect_t *pClipRects, *pBackClipRects;
     GLboolean retval;
     size_t size;
 
+    /* If the X window has been destroyed, give up here. */
+    if (drawable->base.pDraw == NULL)
+	return GL_FALSE;
+
+    pScreen = drawable->base.pDraw->pScreen;
     __glXenterServer(GL_FALSE);
     retval = DRIGetDrawableInfo(pScreen, drawable->base.pDraw, index, stamp,
 				x, y, width, height,
diff --git a/GL/glx/glxext.c b/GL/glx/glxext.c
index 546d87f01..772538940 100644
--- a/GL/glx/glxext.c
+++ b/GL/glx/glxext.c
@@ -122,6 +122,8 @@ static Bool DrawableGone(__GLXdrawable *glxPriv, XID xid)
 	cx->pendingState |= __GLX_PENDING_DESTROY;
     }
 
+    glxPriv->pDraw = NULL;
+    glxPriv->drawId = 0;
     __glXUnrefDrawable(glxPriv);
 
     return True;
-- 
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