WeakAccount

tor_memquota::mtracker

Struct WeakAccount 

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pub struct WeakAccount(/* private fields */);
Expand description

Weak handle onto an Account

Like Account, but doesn’t keep the account alive. Must be upgraded before use.

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impl WeakAccount

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pub fn upgrade(&self) -> Result<Account>

Upgrade to an Account, if the account still exists

No-op WeakAccounts can always be upgraded.

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pub fn tracker(&self) -> Weak<MemoryQuotaTracker>

Obtains a handle onto the MemoryQuotaTracker

The returned handle is itself weak, and needs to be upgraded before use.

If the Account was made a no-op MemoryQuotaTracker (ie, one from MemoryQuotaTracker::new_noop) the returned value is always Weak.

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pub fn new_dangling() -> Self

Creates a new dangling, dummy, WeakAccount

This can be used as a standin where a value of type WeakAccount is needed. The returned value cannot be upgraded to an Account, so cannot be used to claim memory or find a MemoryQuotaTracker.

(If memory quota tracking is disabled at compile time, the returned value can be upgraded, to a no-op Account.)

Trait Implementations§

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impl Clone for WeakAccount

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fn clone(&self) -> WeakAccount

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for WeakAccount

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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

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where T: ?Sized,

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fn borrow(&self) -> &T

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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impl<T> From<T> for T

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fn from(t: T) -> T

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

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const ALIGN: usize

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn deref<'a>(ptr: usize) -> &'a T

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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

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unsafe fn drop(ptr: usize)

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type Error = Infallible

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

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impl<T> ErasedDestructor for T
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes