1 files changed, 53 insertions, 0 deletions
diff --git a/vendor/hyper-util/src/common/exec.rs b/vendor/hyper-util/src/common/exec.rs
new file mode 100644
index 00000000..40860ee1
--- /dev/null
+++ b/vendor/hyper-util/src/common/exec.rs
@@ -0,0 +1,53 @@
+#![allow(dead_code)]
+
+use hyper::rt::Executor;
+use std::fmt;
+use std::future::Future;
+use std::pin::Pin;
+use std::sync::Arc;
+
+pub(crate) type BoxSendFuture = Pin<Box<dyn Future<Output = ()> + Send>>;
+
+// Either the user provides an executor for background tasks, or we use
+// `tokio::spawn`.
+#[derive(Clone)]
+pub(crate) enum Exec {
+    Executor(Arc<dyn Executor<BoxSendFuture> + Send + Sync>),
+}
+
+// ===== impl Exec =====
+
+impl Exec {
+    pub(crate) fn new<E>(inner: E) -> Self
+    where
+        E: Executor<BoxSendFuture> + Send + Sync + 'static,
+    {
+        Exec::Executor(Arc::new(inner))
+    }
+
+    pub(crate) fn execute<F>(&self, fut: F)
+    where
+        F: Future<Output = ()> + Send + 'static,
+    {
+        match *self {
+            Exec::Executor(ref e) => {
+                e.execute(Box::pin(fut));
+            }
+        }
+    }
+}
+
+impl fmt::Debug for Exec {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Exec").finish()
+    }
+}
+
+impl<F> hyper::rt::Executor<F> for Exec
+where
+    F: Future<Output = ()> + Send + 'static,
+{
+    fn execute(&self, fut: F) {
+        Exec::execute(self, fut);
+    }
+}