feat(executor): add multi::Executor

src/executor/mod.rs

@@ -1,3 +1,10 @@
+// Copyright 2023 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+#[cfg(feature = "tokio")]
+pub mod multi;
+
+#[cfg(feature = "tokio")]
 pub mod single;
 
 #[cfg(not(feature = "tokio"))]

src/executor/multi.rs

@@ -0,0 +1,27 @@
+// Copyright 2023 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+use std::future::Future;
+
+#[cfg(feature = "tokio")]
+pub struct Executor(tokio::runtime::Runtime);
+
+#[cfg(feature = "tokio")]
+impl iced_native::Executor for Executor {
+    fn new() -> Result<Self, iced::futures::io::Error> {
+        Ok(Self(
+            tokio::runtime::Builder::new_multi_thread()
+                .enable_all()
+                .build()?,
+        ))
+    }
+
+    fn spawn(&self, future: impl Future<Output = ()> + Send + 'static) {
+        let _res = self.0.spawn(future);
+    }
+
+    fn enter<R>(&self, f: impl FnOnce() -> R) -> R {
+        let _guard = self.0.enter();
+        f()
+    }
+}

src/executor/single.rs

@@ -1,3 +1,6 @@
+// Copyright 2023 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
 use std::future::Future;
 
 #[cfg(feature = "tokio")]
@@ -18,7 +21,7 @@ impl iced_native::Executor for Executor {
     }
 
     fn spawn(&self, future: impl Future<Output = ()> + Send + 'static) {
-        let _ = self.0.spawn(future);
+        let _res = self.0.spawn(future);
     }
 
     fn enter<R>(&self, f: impl FnOnce() -> R) -> R {