bastion_executor_trait/
lib.rsuse async_trait::async_trait;
use executor_trait::{BlockingExecutor, Executor, FullExecutor, LocalExecutorError, Task};
use std::{
future::Future,
pin::Pin,
task::{Context, Poll},
};
#[derive(Debug, Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
pub struct Bastion;
struct BTask(lightproc::recoverable_handle::RecoverableHandle<()>);
impl FullExecutor for Bastion {}
impl Executor for Bastion {
fn block_on(&self, f: Pin<Box<dyn Future<Output = ()>>>) {
bastion::run!(f);
}
fn spawn(&self, f: Pin<Box<dyn Future<Output = ()> + Send>>) -> Box<dyn Task> {
Box::new(BTask(bastion::executor::spawn(f)))
}
fn spawn_local(
&self,
f: Pin<Box<dyn Future<Output = ()>>>,
) -> Result<Box<dyn Task>, LocalExecutorError> {
Err(LocalExecutorError(f))
}
}
#[async_trait]
impl BlockingExecutor for Bastion {
async fn spawn_blocking(&self, f: Box<dyn FnOnce() + Send + 'static>) {
bastion::executor::blocking(async move { f() }).await;
}
}
#[async_trait(?Send)]
impl Task for BTask {
async fn cancel(self: Box<Self>) -> Option<()> {
self.0.cancel();
self.0.await
}
}
impl Future for BTask {
type Output = ();
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
match Pin::new(&mut self.0).poll(cx) {
Poll::Pending => Poll::Pending,
Poll::Ready(res) => {
res.expect("task has been canceled");
Poll::Ready(())
}
}
}
}