1 files changed, 26 insertions, 0 deletions
diff --git a/compiler/rustc_data_structures/src/flock.rs b/compiler/rustc_data_structures/src/flock.rs
new file mode 100644
index 000000000..e395d8dbb
--- /dev/null
+++ b/compiler/rustc_data_structures/src/flock.rs
@@ -0,0 +1,26 @@
+//! Simple file-locking apis for each OS.
+//!
+//! This is not meant to be in the standard library, it does nothing with
+//! green/native threading. This is just a bare-bones enough solution for
+//! librustdoc, it is not production quality at all.
+
+#![allow(non_camel_case_types)]
+#![allow(nonstandard_style)]
+
+cfg_if! {
+    if #[cfg(target_os = "linux")] {
+        mod linux;
+        use linux as imp;
+    } else if #[cfg(unix)] {
+        mod unix;
+        use unix as imp;
+    } else if #[cfg(windows)] {
+        mod windows;
+        use windows as imp;
+    } else {
+        mod unsupported;
+        use unsupported as imp;
+    }
+}
+
+pub use imp::Lock;