Struct rstubs::util::PerCPU

pub struct PerCPU<T>(UnsafeCell<[Align<T>; 1]>);

Expand description

Abstraction for per cpu data.

As the data can only edited by the corresponding cpu, mutable access is save even without locking. The data is cache aligned, to prevent false-sharing effects.

§Safety

Be aware of context switches! If the thread changes while the per-cpu data is updated, things might break. Disable interrupts or enter the E1/2 to prevent this!

Tuple Fields§

§0: UnsafeCell<[Align<T>; 1]>

Implementations§

impl<T> PerCPU<T>

pub const fn new(v: [Align<T>; 1]) -> Self

pub fn get(&self) -> &mut T

Get the cpu-local value.

Note: Preemption has to be disabled!

pub unsafe fn get_raw(&self, id: usize) -> &mut T

Get a cpu-local value.

Trait Implementations§

impl<T: Debug> Debug for PerCPU<T>

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

Formats the value using the given formatter. Read more

impl<T> Sync for PerCPU<T>

Auto Trait Implementations§

impl<T> !RefUnwindSafe for PerCPU<T>

impl<T> Send for PerCPU<T>
where T: Send,

impl<T> Unpin for PerCPU<T>
where T: Unpin,

impl<T> UnwindSafe for PerCPU<T>
where T: UnwindSafe,

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.