1 files changed, 15 insertions, 0 deletions
diff --git a/third_party/rust/tokio/src/future/block_on.rs b/third_party/rust/tokio/src/future/block_on.rs
new file mode 100644
index 0000000000..91f9cc0055
--- /dev/null
+++ b/third_party/rust/tokio/src/future/block_on.rs
@@ -0,0 +1,15 @@
+use std::future::Future;
+
+cfg_rt! {
+    pub(crate) fn block_on<F: Future>(f: F) -> F::Output {
+        let mut e = crate::runtime::enter::enter(false);
+        e.block_on(f).unwrap()
+    }
+}
+
+cfg_not_rt! {
+    pub(crate) fn block_on<F: Future>(f: F) -> F::Output {
+        let mut park = crate::park::thread::CachedParkThread::new();
+        park.block_on(f).unwrap()
+    }
+}