Function pthread_mutexattr_getrobust 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pthread_mutexattr_getrobust(
    attr: *const pthread_mutexattr_t,
    robust: &mut c_int,
) -> c_int

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