From 13ed4f6c4748019787d24c2b686d417b71604242 Mon Sep 17 00:00:00 2001
From: Pascal Kuthe
Date: Fri, 1 Dec 2023 00:03:26 +0100
Subject: Add hook/event system

---
 helix-event/src/cancel.rs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 helix-event/src/cancel.rs

(limited to 'helix-event/src/cancel.rs')

diff --git a/helix-event/src/cancel.rs b/helix-event/src/cancel.rs
new file mode 100644
index 00000000..f027be80
--- /dev/null
+++ b/helix-event/src/cancel.rs
@@ -0,0 +1,19 @@
+use std::future::Future;
+
+pub use oneshot::channel as cancelation;
+use tokio::sync::oneshot;
+
+pub type CancelTx = oneshot::Sender<()>;
+pub type CancelRx = oneshot::Receiver<()>;
+
+pub async fn cancelable_future<T>(future: impl Future<Output = T>, cancel: CancelRx) -> Option<T> {
+    tokio::select! {
+        biased;
+        _ = cancel => {
+            None
+        }
+        res = future => {
+            Some(res)
+        }
+    }
+}
-- 
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