XGrabServer, XUngrabServer - grab the server

display   Specifies the connection to the X server.

       The  XGrabServer  function  disables processing of requests and close downs on all other connections than
       the one this request arrived on.  You should not grab the X server any more than is absolutely necessary.

       The XUngrabServer function restarts processing of requests and close downs  on  other  connections.   You
       should avoid grabbing the X server as much as possible.

       XGrabServer, XUngrabServer - grab the server

XGrabButton(3), XGrabKey(3), XGrabKeyboard(3), XGrabPointer(3)
       Xlib-CLanguageXInterface

X Version 11                                      libX11 1.8.12                                   XGrabServer(3)

       int XGrabServer(Display *display);

       int XUngrabServer(Display *display);