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TempClonable

vfs::temp_clone

Struct TempClonable 

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pub struct TempClonable<T: AsHandleRef>(/* private fields */);
Expand description

A wrapper around zircon handles that allows them to be temporarily cloned. These temporary clones can be used with unblock below which requires callbacks with static lifetime. This is similar to Arc, except that whilst there are no clones, there is no memory overhead, and there’s no performance overhead to use them just as you would without the wrapper, except for a small overhead when they are dropped. The wrapper ensures that the handle is only dropped when there are no references.

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impl<T: AsHandleRef> TempClonable<T>

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pub fn new(handle: T) -> Self

Returns a new handle that can be temporarily cloned.

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impl<T: AsHandleRef> TempClonable<T>

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pub fn temp_clone(&self) -> TempClone<T>

Creates a temporary clone of the handle. The clone should only exist temporarily.

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Panics if the handle is invalid.

Trait Implementations§

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impl<T: AsHandleRef> Deref for TempClonable<T>

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type Target = T

The resulting type after dereferencing.
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fn deref(&self) -> &T

Dereferences the value.
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impl<T: AsHandleRef> Drop for TempClonable<T>

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fn drop(&mut self)

Executes the destructor for this type. Read more
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fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)
Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned. Read more

Auto Trait Implementations§

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impl<T> Freeze for TempClonable<T>
where ManuallyDrop<T>: Freeze,

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impl<T> RefUnwindSafe for TempClonable<T>
where ManuallyDrop<T>: RefUnwindSafe,

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impl<T> Send for TempClonable<T>
where ManuallyDrop<T>: Send,

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impl<T> Sync for TempClonable<T>
where ManuallyDrop<T>: Sync,

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impl<T> Unpin for TempClonable<T>
where ManuallyDrop<T>: Unpin,

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impl<T> UnsafeUnpin for TempClonable<T>
where ManuallyDrop<T>: UnsafeUnpin,

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impl<T> UnwindSafe for TempClonable<T>
where ManuallyDrop<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<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T, D> Encode<Ambiguous1, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T, D> Encode<Ambiguous2, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. 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> IntoAny for T
where T: 'static + Send + Sync,

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

Cast the given object into a dyn std::any::Any.
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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> 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> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

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impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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impl<T> Same for T

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type Output = T

Should always be Self
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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.