Function IOServiceAddNotification 

pub unsafe extern "C-unwind" fn IOServiceAddNotification(
    main_port: mach_port_t,
    notification_type: *mut [c_char; 128],
    matching: Option<&CFDictionary>,
    wake_port: mach_port_t,
    reference: usize,
    notification: *mut io_iterator_t,
) -> kern_return_t

Available on crate feature libc only.