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#![allow(missing_docs)]
use std::any::Any;
use wasmtime_runtime::VMExternRef;
/// Represents an opaque reference to any data within WebAssembly.
#[derive(Clone, Debug)]
#[repr(transparent)]
pub struct ExternRef {
pub(crate) inner: VMExternRef,
}
impl ExternRef {
/// Creates a new instance of `ExternRef` wrapping the given value.
pub fn new<T>(value: T) -> ExternRef
where
T: 'static + Any + Send + Sync,
{
let inner = VMExternRef::new(value);
ExternRef { inner }
}
/// Get the underlying data for this `ExternRef`.
pub fn data(&self) -> &dyn Any {
&*self.inner
}
/// Get the strong reference count for this `ExternRef`.
///
/// Note that this loads the reference count with a `SeqCst` ordering to
/// synchronize with other threads.
pub fn strong_count(&self) -> usize {
self.inner.strong_count()
}
/// Does this `ExternRef` point to the same inner value as `other`?
///
/// This is *only* pointer equality, and does *not* run any inner value's
/// `Eq` implementation.
pub fn ptr_eq(&self, other: &ExternRef) -> bool {
VMExternRef::eq(&self.inner, &other.inner)
}
}