kernel_api::sync

Struct OnceLock

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pub struct OnceLock<T> {
    data: UnsafeCell<MaybeUninit<T>>,
    once: Once,
}
🔬This is a nightly-only experimental API. (kernel_sync_once)
Available on non-crate feature use_std only.

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§data: UnsafeCell<MaybeUninit<T>>
🔬This is a nightly-only experimental API. (kernel_sync_once)
§once: Once
🔬This is a nightly-only experimental API. (kernel_sync_once)

Implementations§

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impl<T> OnceLock<T>

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pub const fn new() -> Self

🔬This is a nightly-only experimental API. (kernel_sync_once)
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pub fn get(&self) -> Option<&T>

🔬This is a nightly-only experimental API. (kernel_sync_once)
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pub fn get_mut(&mut self) -> Option<&mut T>

🔬This is a nightly-only experimental API. (kernel_sync_once)
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pub fn get_or_init(&self, f: impl FnOnce() -> T) -> &T

🔬This is a nightly-only experimental API. (kernel_sync_once)

Trait Implementations§

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impl<T: Send> Send for OnceLock<T>

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impl<T: Send + Sync> Sync for OnceLock<T>

Auto Trait Implementations§

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impl<T> !Freeze for OnceLock<T>

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impl<T> !RefUnwindSafe for OnceLock<T>

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

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

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.