pub struct AtomicOnceCellArray<T> { /* private fields */ }
Expand description

A fixed-size array with capacity determined at run-time. The elements of the array are uninitialized. Elements may be initialized with set and then retrieved as a reference with get. Calling set is thread-safe. The array will panic if the capacity is exceeded, or the index is out of range, or the set function is called more than once on an index when T is not zero-sized. The array will only drop initialized elements.

§Guarantees

  • The array will not allocate if capacity is 0 or if T is zero-sized.
  • The allocated memory will not be default initialized.
  • Elements initialized by set are immutable.
  • The synchronization is lock-free.

§Zero-sized Types

When T is zero-sized, the array does not track individual indices and instead only maintains a count of how many instances of T have been set in the array. On drop, the array will drop that many instances of T. The array will panic if the number of calls to set exceeds the capacity.

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impl<T> AtomicOnceCellArray<T>

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pub fn with_capacity(capacity: usize) -> AtomicOnceCellArray<T>

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pub fn set(&self, index: usize, val: T)

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pub fn get(&self, index: usize) -> &T

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pub unsafe fn get_all_unchecked(&self) -> &[T]

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pub fn capacity(&self) -> usize

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impl<T> Drop for AtomicOnceCellArray<T>

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl<T> Sync for AtomicOnceCellArray<T>

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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> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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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> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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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.
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impl<T> Resource for T
where T: Downcast + Send + Sync,