Struct wasmer::ExternRef

#[repr(transparent)]
pub struct ExternRef(pub(crate) ExternRef);

An opaque reference to some data. This reference can be passed through Wasm.

Tuple Fields

0: ExternRef

Implementations

impl ExternRef

pub fn new<T>(store: &mut impl AsStoreMut, value: T) -> Self

where T: Any + Send + Sync + 'static + Sized,

Make a new extern reference

pub fn downcast<'a, T>(&self, store: &'a impl AsStoreRef) -> Option<&'a T>

where T: Any + Send + Sync + 'static + Sized,

Try to downcast to the given value.

pub(crate) fn vm_externref(&self) -> VMExternRef

pub(crate) unsafe fn from_vm_externref( store: &mut impl AsStoreMut, vm_externref: VMExternRef, ) -> Self

pub fn is_from_store(&self, store: &impl AsStoreRef) -> bool

Checks whether this ExternRef can be used with the given context.

Primitive (i32, i64, etc) and null funcref/externref values are not tied to a context and can be freely shared between contexts.

Externref and funcref values are tied to a context and can only be used with that context.

Trait Implementations

impl Clone for ExternRef

fn clone(&self) -> ExternRef

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ExternRef

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

Formats the value using the given formatter.

impl From<ExternRef> for Value

fn from(val: ExternRef) -> Self

Converts to this type from the input type.

impl NativeWasmType for ExternRef

const WASM_TYPE: Type = Type::ExternRef

Type for this NativeWasmType.

type Abi = usize

The ABI for this type (i32, i64, f32, f64)