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|
/// Auto-generated bindings for a pre-instantiated version of a
/// component which implements the world `the-world`.
///
/// This structure is created through [`TheWorldPre::new`] which
/// takes a [`InstancePre`](wasmtime::component::InstancePre) that
/// has been created through a [`Linker`](wasmtime::component::Linker).
///
/// For more information see [`TheWorld`] as well.
pub struct TheWorldPre<T> {
instance_pre: wasmtime::component::InstancePre<T>,
indices: TheWorldIndices,
}
impl<T> Clone for TheWorldPre<T> {
fn clone(&self) -> Self {
Self {
instance_pre: self.instance_pre.clone(),
indices: self.indices.clone(),
}
}
}
impl<_T> TheWorldPre<_T> {
/// Creates a new copy of `TheWorldPre` bindings which can then
/// be used to instantiate into a particular store.
///
/// This method may fail if the component behind `instance_pre`
/// does not have the required exports.
pub fn new(
instance_pre: wasmtime::component::InstancePre<_T>,
) -> wasmtime::Result<Self> {
let indices = TheWorldIndices::new(instance_pre.component())?;
Ok(Self { instance_pre, indices })
}
pub fn engine(&self) -> &wasmtime::Engine {
self.instance_pre.engine()
}
pub fn instance_pre(&self) -> &wasmtime::component::InstancePre<_T> {
&self.instance_pre
}
/// Instantiates a new instance of [`TheWorld`] within the
/// `store` provided.
///
/// This function will use `self` as the pre-instantiated
/// instance to perform instantiation. Afterwards the preloaded
/// indices in `self` are used to lookup all exports on the
/// resulting instance.
pub async fn instantiate_async(
&self,
mut store: impl wasmtime::AsContextMut<Data = _T>,
) -> wasmtime::Result<TheWorld>
where
_T: Send,
{
let mut store = store.as_context_mut();
let instance = self.instance_pre.instantiate_async(&mut store).await?;
self.indices.load(&mut store, &instance)
}
}
/// Auto-generated bindings for index of the exports of
/// `the-world`.
///
/// This is an implementation detail of [`TheWorldPre`] and can
/// be constructed if needed as well.
///
/// For more information see [`TheWorld`] as well.
#[derive(Clone)]
pub struct TheWorldIndices {
y: wasmtime::component::ComponentExportIndex,
}
/// Auto-generated bindings for an instance a component which
/// implements the world `the-world`.
///
/// This structure can be created through a number of means
/// depending on your requirements and what you have on hand:
///
/// * The most convenient way is to use
/// [`TheWorld::instantiate_async`] which only needs a
/// [`Store`], [`Component`], and [`Linker`].
///
/// * Alternatively you can create a [`TheWorldPre`] ahead of
/// time with a [`Component`] to front-load string lookups
/// of exports once instead of per-instantiation. This
/// method then uses [`TheWorldPre::instantiate_async`] to
/// create a [`TheWorld`].
///
/// * If you've instantiated the instance yourself already
/// then you can use [`TheWorld::new`].
///
/// * You can also access the guts of instantiation through
/// [`TheWorldIndices::new_instance`] followed
/// by [`TheWorldIndices::load`] to crate an instance of this
/// type.
///
/// These methods are all equivalent to one another and move
/// around the tradeoff of what work is performed when.
///
/// [`Store`]: wasmtime::Store
/// [`Component`]: wasmtime::component::Component
/// [`Linker`]: wasmtime::component::Linker
pub struct TheWorld {
y: wasmtime::component::Func,
}
const _: () = {
#[allow(unused_imports)]
use wasmtime::component::__internal::anyhow;
impl TheWorldIndices {
/// Creates a new copy of `TheWorldIndices` bindings which can then
/// be used to instantiate into a particular store.
///
/// This method may fail if the component does not have the
/// required exports.
pub fn new(
component: &wasmtime::component::Component,
) -> wasmtime::Result<Self> {
let _component = component;
let y = _component
.export_index(None, "y")
.ok_or_else(|| anyhow::anyhow!("no function export `y` found"))?
.1;
Ok(TheWorldIndices { y })
}
/// Creates a new instance of [`TheWorldIndices`] from an
/// instantiated component.
///
/// This method of creating a [`TheWorld`] will perform string
/// lookups for all exports when this method is called. This
/// will only succeed if the provided instance matches the
/// requirements of [`TheWorld`].
pub fn new_instance(
mut store: impl wasmtime::AsContextMut,
instance: &wasmtime::component::Instance,
) -> wasmtime::Result<Self> {
let _instance = instance;
let y = _instance
.get_export(&mut store, None, "y")
.ok_or_else(|| anyhow::anyhow!("no function export `y` found"))?;
Ok(TheWorldIndices { y })
}
/// Uses the indices stored in `self` to load an instance
/// of [`TheWorld`] from the instance provided.
///
/// Note that at this time this method will additionally
/// perform type-checks of all exports.
pub fn load(
&self,
mut store: impl wasmtime::AsContextMut,
instance: &wasmtime::component::Instance,
) -> wasmtime::Result<TheWorld> {
let _instance = instance;
let y = *_instance.get_typed_func::<(), ()>(&mut store, &self.y)?.func();
Ok(TheWorld { y })
}
}
impl TheWorld {
/// Convenience wrapper around [`TheWorldPre::new`] and
/// [`TheWorldPre::instantiate_async`].
pub async fn instantiate_async<_T>(
mut store: impl wasmtime::AsContextMut<Data = _T>,
component: &wasmtime::component::Component,
linker: &wasmtime::component::Linker<_T>,
) -> wasmtime::Result<TheWorld>
where
_T: Send,
{
let pre = linker.instantiate_pre(component)?;
TheWorldPre::new(pre)?.instantiate_async(store).await
}
/// Convenience wrapper around [`TheWorldIndices::new_instance`] and
/// [`TheWorldIndices::load`].
pub fn new(
mut store: impl wasmtime::AsContextMut,
instance: &wasmtime::component::Instance,
) -> wasmtime::Result<TheWorld> {
let indices = TheWorldIndices::new_instance(&mut store, instance)?;
indices.load(store, instance)
}
pub async fn call_y<S: wasmtime::AsContextMut>(
&self,
mut store: S,
) -> wasmtime::Result<()>
where
<S as wasmtime::AsContext>::Data: Send,
{
let callee = unsafe {
wasmtime::component::TypedFunc::<(), ()>::new_unchecked(self.y)
};
let () = callee.call_async(store.as_context_mut(), ()).await?;
callee.post_return_async(store.as_context_mut()).await?;
Ok(())
}
}
};
|
