Enum wasmer_vm::WeakOrStrongInstanceRef

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pub enum WeakOrStrongInstanceRef {
    Weak(WeakInstanceRef),
    Strong(InstanceRef),
}

Expand description

An InstanceRef that may or may not be keeping the Instance alive.

This type is useful for types that conditionally must keep / not keep the underlying Instance alive. For example, to prevent cycles in WasmerEnvs.

Variants

`Weak(WeakInstanceRef)`

A weak instance ref.

`Strong(InstanceRef)`

A strong instance ref.

Implementations

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impl WeakOrStrongInstanceRef

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pub fn upgrade(&self) -> Option<Self>

Tries to upgrade weak references to a strong reference, returning None if it can’t be done.

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pub fn downgrade(&self) -> Self

Clones self into a weak reference.

Trait Implementations

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impl Clone for WeakOrStrongInstanceRef

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fn clone(&self) -> WeakOrStrongInstanceRef

Returns a copy 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 WeakOrStrongInstanceRef

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

Formats the value using the given formatter. Read more

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impl MemoryUsage for WeakOrStrongInstanceRef

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fn size_of_val(&self, visited: &mut dyn MemoryUsageTracker) -> usize

Returns the size of the referenced value in bytes. Read more

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impl PartialEq<WeakOrStrongInstanceRef> for WeakOrStrongInstanceRef

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fn eq(&self, other: &WeakOrStrongInstanceRef) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

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fn ne(&self, other: &WeakOrStrongInstanceRef) -> bool

This method tests for !=.

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impl StructuralPartialEq for WeakOrStrongInstanceRef

Auto Trait Implementations

impl !RefUnwindSafe for WeakOrStrongInstanceRef

impl Send for WeakOrStrongInstanceRef

impl Sync for WeakOrStrongInstanceRef

impl Unpin for WeakOrStrongInstanceRef

impl !UnwindSafe for WeakOrStrongInstanceRef

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

impl<T> ArchivePointee for T

type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.

fn pointer_metadata(
&<T as ArchivePointee>::ArchivedMetadata
) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

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,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<F, W, T, D> Deserialize<With<T, W>, D> for F where
 W: DeserializeWith<F, T, D>,
 D: Fallible + ?Sized,
 F: ?Sized,

fn deserialize(
&self,
deserializer: &mut D
) -> Result<With<T, W>, <D as Fallible>::Error>

Deserializes using the given deserializer

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

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

impl<T> Pointee for T

type Metadata = ()

The type for metadata in pointers and references to Self.

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<T> Upcastable for T where
T: 'static + Any + Send + Sync,

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fn upcast_any_ref(&self) -> &(dyn Any + 'static)

upcast ref

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fn upcast_any_mut(&mut self) -> &mut (dyn Any + 'static)

upcast mut ref

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fn upcast_any_box(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

upcast boxed dyn

Enum wasmer_vm::WeakOrStrongInstanceRef

Variants

Weak(WeakInstanceRef)

Strong(InstanceRef)

Implementations

impl WeakOrStrongInstanceRef

pub fn upgrade(&self) -> Option<Self>

pub fn downgrade(&self) -> Self

Trait Implementations

impl Clone for WeakOrStrongInstanceRef

fn clone(&self) -> WeakOrStrongInstanceRef

fn clone_from(&mut self, source: &Self)

impl Debug for WeakOrStrongInstanceRef

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

impl MemoryUsage for WeakOrStrongInstanceRef

fn size_of_val(&self, visited: &mut dyn MemoryUsageTracker) -> usize

impl PartialEq<WeakOrStrongInstanceRef> for WeakOrStrongInstanceRef

fn eq(&self, other: &WeakOrStrongInstanceRef) -> bool

fn ne(&self, other: &WeakOrStrongInstanceRef) -> bool

impl StructuralPartialEq for WeakOrStrongInstanceRef

Auto Trait Implementations

impl !RefUnwindSafe for WeakOrStrongInstanceRef

impl Send for WeakOrStrongInstanceRef

impl Sync for WeakOrStrongInstanceRef

impl Unpin for WeakOrStrongInstanceRef

impl !UnwindSafe for WeakOrStrongInstanceRef

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<T> ArchivePointee for T

type ArchivedMetadata = ()

fn pointer_metadata( &<T as ArchivePointee>::ArchivedMetadata) -> <T as Pointee>::Metadata

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<F, W, T, D> Deserialize<With<T, W>, D> for F where W: DeserializeWith<F, T, D>, D: Fallible + ?Sized, F: ?Sized,

fn deserialize( &self, deserializer: &mut D) -> Result<With<T, W>, <D as Fallible>::Error>

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> Pointee for T

type Metadata = ()

impl<T> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> Upcastable for T where T: 'static + Any + Send + Sync,

fn upcast_any_ref(&self) -> &(dyn Any + 'static)

fn upcast_any_mut(&mut self) -> &mut (dyn Any + 'static)

fn upcast_any_box(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

`Weak(WeakInstanceRef)`

`Strong(InstanceRef)`

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

fn pointer_metadata(
&<T as ArchivePointee>::ArchivedMetadata
) -> <T as Pointee>::Metadata

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<F, W, T, D> Deserialize<With<T, W>, D> for F where
W: DeserializeWith<F, T, D>,
D: Fallible + ?Sized,
F: ?Sized,

fn deserialize(
&self,
deserializer: &mut D
) -> Result<With<T, W>, <D as Fallible>::Error>

impl<T, U> Into<U> for T where
U: From<T>,

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<T> Upcastable for T where
T: 'static + Any + Send + Sync,