1 files changed, 52 insertions, 0 deletions
diff --git a/examples/spawn.rs b/examples/spawn.rs
new file mode 100644
index 0000000..6e798c0
--- /dev/null
+++ b/examples/spawn.rs
@@ -0,0 +1,52 @@
+//! A simple single-threaded executor.
+
+#![feature(async_await)]
+
+use std::future::Future;
+use std::panic::catch_unwind;
+use std::thread;
+
+use crossbeam::channel::{unbounded, Sender};
+use futures::executor;
+use lazy_static::lazy_static;
+
+/// Spawns a future on the executor.
+fn spawn<F, R>(future: F) -> async_task::JoinHandle<R, ()>
+where
+    F: Future<Output = R> + Send + 'static,
+    R: Send + 'static,
+{
+    lazy_static! {
+        // A channel that holds scheduled tasks.
+        static ref QUEUE: Sender<async_task::Task<()>> = {
+            let (sender, receiver) = unbounded::<async_task::Task<()>>();
+
+            // Start the executor thread.
+            thread::spawn(|| {
+                for task in receiver {
+                    // Ignore panics for simplicity.
+                    let _ignore_panic = catch_unwind(|| task.run());
+                }
+            });
+
+            sender
+        };
+    }
+
+    // Create a task that is scheduled by sending itself into the channel.
+    let schedule = |t| QUEUE.send(t).unwrap();
+    let (task, handle) = async_task::spawn(future, schedule, ());
+
+    // Schedule the task by sending it into the channel.
+    task.schedule();
+
+    handle
+}
+
+fn main() {
+    // Spawn a future and await its result.
+    let handle = spawn(async {
+        println!("Hello, world!");
+    });
+    executor::block_on(handle);
+}