Enum wasmer_vm::WeakOrStrongInstanceRef

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

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

impl WeakOrStrongInstanceRef

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

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

pub fn downgrade(&self) -> Self

Clones self into a weak reference.

Trait Implementations

impl Clone for WeakOrStrongInstanceRef

fn clone(&self) -> WeakOrStrongInstanceRef

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WeakOrStrongInstanceRef

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

Formats the value using the given formatter.

impl MemoryUsage for WeakOrStrongInstanceRef

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

Returns the size of the referenced value in bytes.

impl PartialEq<WeakOrStrongInstanceRef> for WeakOrStrongInstanceRef

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

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

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

This method tests for !=.

impl StructuralPartialEq for WeakOrStrongInstanceRef