Split iced_futures into different backend implementations

futures/src/backend/native/thread_pool.rs

@@ -0,0 +1,16 @@
+//! A `ThreadPool` backend.
+use futures::Future;
+
+/// A thread pool executor for futures.
+#[cfg_attr(docsrs, doc(cfg(feature = "thread-pool")))]
+pub type ThreadPool = futures::executor::ThreadPool;
+
+impl crate::Executor for futures::executor::ThreadPool {
+    fn new() -> Result<Self, futures::io::Error> {
+        futures::executor::ThreadPool::new()
+    }
+
+    fn spawn(&self, future: impl Future<Output = ()> + Send + 'static) {
+        self.spawn_ok(future);
+    }
+}