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WeakPool

Struct WeakPool 

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pub struct WeakPool<M: Manager, W: From<Object<M>> = Object<M>> { /* private fields */ }
Expand description

A weak reference to a Pool<T>, used to avoid keeping the pool alive.

WeakPool<T> is analogous to std::sync::Weak<T> for Pool<T>, and is typically used in situations where you need a non-owning reference to a pool, such as in background tasks, managers, or callbacks that should not extend the lifetime of the pool.

This allows components to retain a reference to the pool while avoiding reference cycles or prolonging its lifetime unnecessarily.

To access the pool, use WeakPool::upgrade to attempt to get a strong reference.

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impl<M: Manager, W: From<Object<M>>> WeakPool<M, W>

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pub fn upgrade(&self) -> Option<Pool<M, W>>

Attempts to upgrade the WeakPool to a strong Pool<T> reference.

If the pool has already been dropped (i.e., no strong references remain), this returns None.

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impl<M: Debug + Manager, W: Debug + From<Object<M>>> Debug for WeakPool<M, W>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<M, W = Object<M>> !RefUnwindSafe for WeakPool<M, W>

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impl<M, W = Object<M>> !UnwindSafe for WeakPool<M, W>

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impl<M, W> Freeze for WeakPool<M, W>
where Weak<PoolInner<M>>: Freeze, PhantomData<fn() -> W>: Freeze,

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impl<M, W> Send for WeakPool<M, W>
where Weak<PoolInner<M>>: Send, PhantomData<fn() -> W>: Send,

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impl<M, W> Sync for WeakPool<M, W>
where Weak<PoolInner<M>>: Sync, PhantomData<fn() -> W>: Sync,

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impl<M, W> Unpin for WeakPool<M, W>
where Weak<PoolInner<M>>: Unpin, PhantomData<fn() -> W>: Unpin,

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impl<M, W> UnsafeUnpin for WeakPool<M, W>
where Weak<PoolInner<M>>: UnsafeUnpin, PhantomData<fn() -> W>: UnsafeUnpin,

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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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 = !

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

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> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more