Update to a new pinning API.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/liballoc/sync.rs b/src/liballoc/sync.rs
index 2cd7898f4c7..d9607af1902 100644
--- a/src/liballoc/sync.rs
+++ b/src/liballoc/sync.rs
@@ -26,6 +26,7 @@ use core::intrinsics::abort;
 use core::mem::{self, align_of_val, size_of_val};
 use core::ops::Deref;
 use core::ops::CoerceUnsized;
+use core::pin::Pin;
 use core::ptr::{self, NonNull};
 use core::marker::{Unsize, PhantomData};
 use core::hash::{Hash, Hasher};
@@ -296,6 +297,11 @@ impl<T> Arc<T> {
         Arc { ptr: Box::into_raw_non_null(x), phantom: PhantomData }
     }
 
+    #[unstable(feature = "pin", issue = "49150")]
+    pub fn pinned(data: T) -> Pin<Arc<T>> {
+        unsafe { Pin::new_unchecked(Arc::new(data)) }
+    }
+
     /// Returns the contained value, if the `Arc` has exactly one strong reference.
     ///
     /// Otherwise, an [`Err`][result] is returned with the same `Arc` that was