sync: Introduce the `SetOnce` struct #7418

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Merged

Darksonn merged 20 commits into tokio-rs:master from Daksh14:daksh/add-setOnce-dst

Jul 25, 2025

tokio/src/sync/mod.rs

-Original file line number
+Diff line change
@@ Expand Up / @@ -488,6 +488,9 @@ cfg_sync! { @@
         mod once_cell;
         pub use self::once_cell::{OnceCell, SetError};
+        mod set_once;
+        pub use self::set_once::{SetOnce, SetOnceError};
         pub mod watch;
     }
@@ Expand Down @@