1 files changed, 41 insertions, 0 deletions
diff --git a/library/std/src/sys/unix/ext/thread.rs b/library/std/src/sys/unix/ext/thread.rs
new file mode 100644
index 00000000000..759ef6236e8
--- /dev/null
+++ b/library/std/src/sys/unix/ext/thread.rs
@@ -0,0 +1,41 @@
+//! Unix-specific extensions to primitives in the `std::thread` module.
+
+#![stable(feature = "thread_extensions", since = "1.9.0")]
+
+#[allow(deprecated)]
+use crate::os::unix::raw::pthread_t;
+use crate::sys_common::{AsInner, IntoInner};
+use crate::thread::JoinHandle;
+
+#[stable(feature = "thread_extensions", since = "1.9.0")]
+#[allow(deprecated)]
+pub type RawPthread = pthread_t;
+
+/// Unix-specific extensions to [`thread::JoinHandle`].
+///
+/// [`thread::JoinHandle`]: ../../../../std/thread/struct.JoinHandle.html
+#[stable(feature = "thread_extensions", since = "1.9.0")]
+pub trait JoinHandleExt {
+    /// Extracts the raw pthread_t without taking ownership
+    #[stable(feature = "thread_extensions", since = "1.9.0")]
+    fn as_pthread_t(&self) -> RawPthread;
+
+    /// Consumes the thread, returning the raw pthread_t
+    ///
+    /// This function **transfers ownership** of the underlying pthread_t to
+    /// the caller. Callers are then the unique owners of the pthread_t and
+    /// must either detach or join the pthread_t once it's no longer needed.
+    #[stable(feature = "thread_extensions", since = "1.9.0")]
+    fn into_pthread_t(self) -> RawPthread;
+}
+
+#[stable(feature = "thread_extensions", since = "1.9.0")]
+impl<T> JoinHandleExt for JoinHandle<T> {
+    fn as_pthread_t(&self) -> RawPthread {
+        self.as_inner().id() as RawPthread
+    }
+
+    fn into_pthread_t(self) -> RawPthread {
+        self.into_inner().into_id() as RawPthread
+    }
+}