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diff --git a/xorg-server/include/callback.h b/xorg-server/include/callback.h
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+/***********************************************************
+
+Copyright 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+
+#ifndef CALLBACK_H
+#define CALLBACK_H
+
+#include <X11/X.h>	/* for GContext, Mask */
+#include <X11/Xdefs.h>	/* for Bool */
+#include <X11/Xproto.h>
+#include <X11/Xfuncproto.h>
+
+/*
+ *  callback manager stuff
+ */
+
+#ifndef _XTYPEDEF_CALLBACKLISTPTR
+typedef struct _CallbackList *CallbackListPtr; /* also in misc.h */
+#define _XTYPEDEF_CALLBACKLISTPTR
+#endif
+
+typedef void (*CallbackProcPtr) (
+    CallbackListPtr *, pointer, pointer);
+
+extern _X_EXPORT Bool AddCallback(
+    CallbackListPtr * /*pcbl*/,
+    CallbackProcPtr /*callback*/,
+    pointer /*data*/);
+
+extern _X_EXPORT Bool DeleteCallback(
+    CallbackListPtr * /*pcbl*/,
+    CallbackProcPtr /*callback*/,
+    pointer /*data*/);
+
+extern _X_EXPORT void CallCallbacks(
+    CallbackListPtr * /*pcbl*/,
+    pointer /*call_data*/);
+
+extern _X_EXPORT void DeleteCallbackList(
+    CallbackListPtr * /*pcbl*/);
+
+extern _X_EXPORT void InitCallbackManager(void);
+
+#endif /* CALLBACK_H */