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Diffstat (limited to 'src/glx/x11/XF86dri.c')
-rw-r--r--src/glx/x11/XF86dri.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/src/glx/x11/XF86dri.c b/src/glx/x11/XF86dri.c
index 8909a04772..721bb3e65a 100644
--- a/src/glx/x11/XF86dri.c
+++ b/src/glx/x11/XF86dri.c
@@ -427,16 +427,37 @@ PUBLIC GLboolean XF86DRICreateDrawable( __DRInativeDisplay * ndpy, int screen,
return True;
}
+static int noopErrorHandler(Display *dpy, XErrorEvent *xerr)
+{
+ return 0;
+}
+
PUBLIC GLboolean XF86DRIDestroyDrawable( __DRInativeDisplay * ndpy, int screen,
__DRIid drawable )
{
Display * const dpy = (Display *) ndpy;
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIDestroyDrawableReq *req;
+ int (*oldXErrorHandler)(Display *, XErrorEvent *);
TRACE("DestroyDrawable...");
XF86DRICheckExtension (dpy, info, False);
+ /* This is called from the DRI driver, which used call it like this
+ *
+ * if (windowExists(drawable))
+ * destroyDrawable(drawable);
+ *
+ * which is a textbook race condition - the window may disappear
+ * from the server between checking for its existance and
+ * destroying it. Instead we change the semantics of
+ * __DRIinterfaceMethodsRec::destroyDrawable() to succeed even if
+ * the windows is gone, by wrapping the destroy call in an error
+ * handler. */
+
+ XSync(dpy, GL_FALSE);
+ oldXErrorHandler = XSetErrorHandler(noopErrorHandler);
+
LockDisplay(dpy);
GetReq(XF86DRIDestroyDrawable, req);
req->reqType = info->codes->major_opcode;
@@ -445,6 +466,9 @@ PUBLIC GLboolean XF86DRIDestroyDrawable( __DRInativeDisplay * ndpy, int screen,
req->drawable = drawable;
UnlockDisplay(dpy);
SyncHandle();
+
+ XSetErrorHandler(oldXErrorHandler);
+
TRACE("DestroyDrawable... return True");
return True;
}