Struct AtomicCpuSet

pub struct AtomicCpuSet {
    bits: SmallVec<[AtomicU64; 2]>,
}

A subset of all CPUs in the system with atomic operations.

It provides atomic operations for each CPU in the system. When the operation contains multiple CPUs, the ordering is not guaranteed.

Fields

bits: SmallVec<[AtomicU64; 2]>

Implementations

impl AtomicCpuSet

pub fn new(value: CpuSet) -> Self

Creates a new AtomicCpuSet with an initial value.

pub fn load(&self, ordering: Ordering) -> CpuSet

Loads the value of the set with the given ordering.

This operation is not atomic. When racing with a Self::store operation, this load may return a set that contains a portion of the new value and a portion of the old value. Load on each specific word is atomic, and follows the specified ordering.

Note that load with Ordering::Release is a valid operation, which is different from the normal atomic operations. When coupled with Ordering::Release, it actually performs fetch_or(0, Release).

pub fn store(&self, value: &CpuSet, ordering: Ordering)

Stores a new value to the set with the given ordering.

This operation is not atomic. When racing with a Self::load operation, that load may return a set that contains a portion of the new value and a portion of the old value. Load on each specific word is atomic, and follows the specified ordering.

pub fn add(&self, cpu_id: CpuId, ordering: Ordering)

Atomically adds a CPU with the given ordering.

pub fn remove(&self, cpu_id: CpuId, ordering: Ordering)

Atomically removes a CPU with the given ordering.

pub fn contains(&self, cpu_id: CpuId, ordering: Ordering) -> bool

Atomically checks if the set contains the specified CPU.

Trait Implementations

impl Debug for AtomicCpuSet

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.