42 lines
1020 B
Rust
42 lines
1020 B
Rust
//! Abstraction over an executor so we can spawn tasks under WASM the same way
|
|
//! we do usually.
|
|
#[cfg(target_arch = "wasm32")]
|
|
use std::{
|
|
pin::Pin,
|
|
task::{Context, Poll},
|
|
};
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
use futures::{future::RemoteHandle, Future, FutureExt};
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
pub use tokio::spawn;
|
|
#[cfg(target_arch = "wasm32")]
|
|
use wasm_bindgen_futures::spawn_local;
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
pub fn spawn<F, T>(future: F) -> JoinHandle<T>
|
|
where
|
|
F: Future<Output = T> + 'static,
|
|
{
|
|
let fut = future.unit_error();
|
|
let (fut, handle) = fut.remote_handle();
|
|
spawn_local(fut);
|
|
|
|
JoinHandle { handle }
|
|
}
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
#[derive(Debug)]
|
|
pub struct JoinHandle<T> {
|
|
handle: RemoteHandle<Result<T, ()>>,
|
|
}
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
impl<T: 'static> Future for JoinHandle<T> {
|
|
type Output = Result<T, ()>;
|
|
|
|
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
|
|
Pin::new(&mut self.handle).poll(cx)
|
|
}
|
|
}
|