Add more from the std

library/std/src/sys/sync/once/mod.rs

@@ -1,40 +0,0 @@
-// A "once" is a relatively simple primitive, and it's also typically provided
-// by the OS as well (see `pthread_once` or `InitOnceExecuteOnce`). The OS
-// primitives, however, tend to have surprising restrictions, such as the Unix
-// one doesn't allow an argument to be passed to the function.
-//
-// As a result, we end up implementing it ourselves in the standard library.
-// This also gives us the opportunity to optimize the implementation a bit which
-// should help the fast path on call sites.
-
-cfg_select! {
-    any(
-        all(target_os = "windows", not(target_vendor="win7")),
-        target_os = "linux",
-        target_os = "android",
-        all(target_family = "wasm", target_feature = "atomics"),
-        target_os = "freebsd",
-        target_os = "motor",
-        target_os = "openbsd",
-        target_os = "dragonfly",
-        target_os = "fuchsia",
-        target_os = "hermit",
-    ) => {
-        mod futex;
-        pub use futex::{Once, OnceState};
-    }
-    any(
-        windows,
-        target_family = "unix",
-        all(target_vendor = "fortanix", target_env = "sgx"),
-        target_os = "solid_asp3",
-        target_os = "xous",
-    ) => {
-        mod queue;
-        pub use queue::{Once, OnceState};
-    }
-    _ => {
-        mod no_threads;
-        pub use no_threads::{Once, OnceState};
-    }
-}

library/std/src/sys/sync/once/mod.rs

@@ -0,0 +1 @@
+/home/julien/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/sync/once/mod.rs