Function x11::xlib::XPeekIfEvent

pub unsafe extern "C" fn XPeekIfEvent(
    _4: *mut Display, 
    _3: *mut XEvent, 
    _2: Option<unsafe extern "C" fn(_: *mut Display, _: *mut XEvent, _: *mut c_char) -> c_int>, 
    _1: *mut c_char
) -> c_int