tor_memquota::drop_reentrancy

Struct ProtectedWeak

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pub(crate) struct ProtectedWeak<P: ?Sized>(Weak<P>);
Expand description

A Weak<P>, but upgradeable only to a ProtectedArc, not a raw Arc.

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§0: Weak<P>

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impl<P: ?Sized> ProtectedWeak<P>

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pub(crate) fn new(p: Weak<P>) -> Self

Make a new ProtectedWeak

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pub(crate) fn upgrade(&self) -> Option<ProtectedArc<P>>

Upgrade a ProtectedWeak to a ProtectedArc, if it’s not been garbage collected

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pub(crate) fn unprotect(self) -> Weak<P>

Convert back into an unprotected Weak.

§CORRECTNESS

You must arrange that the drop reentrancy requirements aren’t violated by Arcs made from the returned Weak.

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impl<P: Debug + ?Sized> Debug for ProtectedWeak<P>

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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<P> Freeze for ProtectedWeak<P>
where P: ?Sized,

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impl<P> RefUnwindSafe for ProtectedWeak<P>
where P: RefUnwindSafe + ?Sized,

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impl<P> Send for ProtectedWeak<P>
where P: Sync + Send + ?Sized,

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impl<P> Sync for ProtectedWeak<P>
where P: Sync + Send + ?Sized,

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impl<P> Unpin for ProtectedWeak<P>
where P: ?Sized,

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impl<P> UnwindSafe for ProtectedWeak<P>
where P: RefUnwindSafe + ?Sized,

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> 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. 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<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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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
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impl<T> ErasedDestructor for T
where T: 'static,