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Refactor CpuSet and introduce AtomicCpuSet

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This commit is contained in:
Zhang Junyang
2024-09-23 09:57:17 +08:00
committed by Tate, Hongliang Tian
parent e60b5b7649
commit 26c4abde58
4 changed files with 274 additions and 70 deletions
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72
ostd/src/cpu/mod.rs
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@ -3,6 +3,7 @@
//! CPU-related definitions.
pub mod local;
pub mod set;
cfg_if::cfg_if! {
if #[cfg(target_arch = "x86_64")] {
@ -12,7 +13,7 @@ cfg_if::cfg_if! {
}
}
use bitvec::prelude::BitVec;
pub use set::{AtomicCpuSet, CpuSet};
use spin::Once;
use crate::{
@ -88,72 +89,3 @@ cpu_local_cell! {
/// The number of the current CPU.
static CURRENT_CPU: u32 = u32::MAX;
}
/// A subset of all CPUs in the system.
///
/// This structure can be used to mask out a subset of CPUs in the system.
#[derive(Clone, Debug, Default)]
pub struct CpuSet {
bitset: BitVec,
}
impl CpuSet {
/// Creates a new `CpuSet` with all CPUs in the system.
pub fn new_full() -> Self {
let num_cpus = num_cpus();
let mut bitset = BitVec::with_capacity(num_cpus as usize);
bitset.resize(num_cpus as usize, true);
Self { bitset }
}
/// Creates a new `CpuSet` with no CPUs in the system.
pub fn new_empty() -> Self {
let num_cpus = num_cpus();
let mut bitset = BitVec::with_capacity(num_cpus as usize);
bitset.resize(num_cpus as usize, false);
Self { bitset }
}
/// Adds a CPU to the set.
pub fn add(&mut self, cpu_id: u32) {
self.bitset.set(cpu_id as usize, true);
}
/// Adds all CPUs to the set.
pub fn add_all(&mut self) {
self.bitset.fill(true);
}
/// Removes a CPU from the set.
pub fn remove(&mut self, cpu_id: u32) {
self.bitset.set(cpu_id as usize, false);
}
/// Removes all CPUs from the set.
pub fn clear(&mut self) {
self.bitset.fill(false);
}
/// Returns true if the set contains the specified CPU.
pub fn contains(&self, cpu_id: u32) -> bool {
self.bitset.get(cpu_id as usize).as_deref() == Some(&true)
}
/// Returns the number of CPUs in the set.
pub fn count(&self) -> usize {
self.bitset.count_ones()
}
/// Iterates over the CPUs in the set.
pub fn iter(&self) -> impl Iterator<Item = u32> + '_ {
self.bitset.iter_ones().map(|idx| idx as u32)
}
}
impl From<u32> for CpuSet {
fn from(cpu_id: u32) -> Self {
let mut set = Self::new_empty();
set.add(cpu_id);
set
}
}