Function sdl2_sys::XCheckIfEvent

pub unsafe extern "C" fn XCheckIfEvent(
    arg1: *mut Display, 
    arg2: *mut XEvent, 
    arg3: Option<unsafe extern "C" fn(arg1: *mut Display, arg2: *mut XEvent, arg3: XPointer) -> c_int>, 
    arg4: XPointer
) -> c_int