Method resource

crates/wasmtime/src/runtime/component/linker.rs:805–817

Defines a new resource of a given [`ResourceType`] in this linker. This function is used to specify resources defined in the host. The `name` argument is the name to define the resource within this linker. The `dtor` provided is a destructor that will get invoked when an owned version of this resource is destroyed from the guest. Note that this destructor is not called when a host-owned resourc

(
        &mut self,
        name: &str,
        ty: ResourceType,
        dtor: impl Fn(StoreContextMut<'_, T>, u32) -> Result<()> + Send + Sync + 'static,
    )

    /// memory allocation fails. See the `OutOfMemory` type's documentation for
    /// details on Wasmtime's out-of-memory handling.
    pub fn resource(
        &mut self,
        name: &str,
        ty: ResourceType,
        dtor: impl Fn(StoreContextMut<'_, T>, u32) -> Result<()> + Send + Sync + 'static,
    ) -> Result<()> {
        let dtor = try_new::<Arc<_>>(crate::func::HostFunc::wrap(
            &self.engine,
            move |mut cx: crate::Caller<'_, T>, (param,): (u32,)| dtor(cx.as_context_mut(), param),
        )?)?;
        self.insert(name, Definition::Resource(ty, dtor))?;
        Ok(())
    }

    /// Identical to [`Self::resource`], except that it takes an async destructor.
    #[cfg(feature = "async")]