Function pthread_getschedparam 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pthread_getschedparam(
    thread: pthread_t,
    policy_out: *mut c_int,
    param_out: *mut sched_param,
) -> c_int

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