1 files changed, 26 insertions, 0 deletions
diff --git a/futures/src/runtime/executor.rs b/futures/src/runtime/executor.rs
new file mode 100644
index 00000000..855aa105
--- /dev/null
+++ b/futures/src/runtime/executor.rs
@@ -0,0 +1,26 @@
+use futures::Future;
+
+pub trait Executor {
+    fn spawn(&self, future: impl Future<Output = ()> + Send + 'static);
+
+    fn enter<R>(&self, f: impl FnOnce() -> R) -> R {
+        f()
+    }
+}
+
+impl Executor for futures::executor::ThreadPool {
+    fn spawn(&self, future: impl Future<Output = ()> + Send + 'static) {
+        self.spawn_ok(future);
+    }
+}
+
+#[cfg(feature = "tokio")]
+impl Executor for tokio::runtime::Runtime {
+    fn spawn(&self, future: impl Future<Output = ()> + Send + 'static) {
+        let _ = tokio::runtime::Runtime::spawn(self, future);
+    }
+
+    fn enter<R>(&self, f: impl FnOnce() -> R) -> R {
+        tokio::runtime::Runtime::enter(self, f)
+    }
+}