point_locked
point_locked — indicates if a point is locked.
point_locked (symbol)
symbolA point name, as a symbol.
Gamma>lock_point(#f,t);tGamma>next_event();nilGamma>point_locked(#f);tGamma>lock_point(#f,nil);tGamma>next_event();nilGamma>point_locked(#f);nilGamma>