[xmonad] Multiple threads

Dear List, Is it possible to render things in the XServer with multiple threads? For example: dpy <- asks display myWin <- createSimpleWindow dpy (defaultRootWindow dpy) 0 0 10 10 black white _ <- forkOS $ do -- doStuff with myWin using dpy When I attempt doing things like that, I usually get a deadlock. Is there any way to do this (I know, X is old :( but no harm in asking). Thank you and best regards, Ernesto Rodriguez -- Ernesto Rodriguez Masters Student Computer Science Utrecht University www.netowork.me github.com/netogallo