Function timer_settime 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn timer_settime(
    timerid: timer_t,
    flags: c_int,
    value: *const itimerspec,
    ovalue: *mut itimerspec,
) -> c_int

See https://pubs.opengroup.org/onlinepubs/9799919799/functions/timer_getoverrun.html.