Function core_scheduling_cookie

src/thread/prctl.rs:1052–1064

(pid: Pid, scope: CoreSchedulingScope)

/// [`prctl(PR_SCHED_CORE,PR_SCHED_CORE_GET,…)`]: https://www.kernel.org/doc/html/v6.13/admin-guide/hw-vuln/core-scheduling.html
#[inline]
pub fn core_scheduling_cookie(pid: Pid, scope: CoreSchedulingScope) -> io::Result<u64> {
    let mut value: MaybeUninit<u64> = MaybeUninit::uninit();
    unsafe {
        syscalls::prctl(
            PR_SCHED_CORE,
            PR_SCHED_CORE_GET as *mut _,
            pid.as_raw_nonzero().get() as usize as *mut _,
            scope as usize as *mut _,
            value.as_mut_ptr().cast(),
        )?;
        Ok(value.assume_init())
    }
}

const PR_SCHED_CORE_CREATE: usize = 1;