From f8322035eb54cdc701b1a856bda952d4bc3837be Mon Sep 17 00:00:00 2001
From: Andrew Paseltiner <apaseltiner@gmail.com>
Date: Fri, 14 Oct 2016 15:31:15 -0400
Subject: [PATCH] Implement `RefUnwindSafe` for atomic types

Closes #37136
---
 src/libstd/lib.rs   |  2 ++
 src/libstd/panic.rs | 42 +++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index c2f6a6f660c..e697c15baab 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -218,6 +218,7 @@
 #![feature(associated_consts)]
 #![feature(borrow_state)]
 #![feature(box_syntax)]
+#![feature(cfg_target_has_atomic)]
 #![feature(cfg_target_thread_local)]
 #![feature(cfg_target_vendor)]
 #![feature(char_escape_debug)]
@@ -239,6 +240,7 @@
 #![feature(heap_api)]
 #![feature(inclusive_range)]
 #![feature(int_error_internals)]
+#![feature(integer_atomics)]
 #![feature(into_cow)]
 #![feature(lang_items)]
 #![feature(libc)]
diff --git a/src/libstd/panic.rs b/src/libstd/panic.rs
index 3788568a2fd..a7e8c4fab37 100644
--- a/src/libstd/panic.rs
+++ b/src/libstd/panic.rs
@@ -18,7 +18,7 @@ use ops::{Deref, DerefMut};
 use panicking;
 use ptr::{Unique, Shared};
 use rc::Rc;
-use sync::{Arc, Mutex, RwLock};
+use sync::{Arc, Mutex, RwLock, atomic};
 use thread::Result;
 
 #[stable(feature = "panic_hooks", since = "1.10.0")]
@@ -231,6 +231,46 @@ impl<T: ?Sized> RefUnwindSafe for Mutex<T> {}
 #[stable(feature = "unwind_safe_lock_refs", since = "1.12.0")]
 impl<T: ?Sized> RefUnwindSafe for RwLock<T> {}
 
+#[cfg(target_has_atomic = "ptr")]
+#[stable(feature = "unwind_safe_atomic_refs", since = "1.14.0")]
+impl RefUnwindSafe for atomic::AtomicIsize {}
+#[cfg(target_has_atomic = "8")]
+#[unstable(feature = "integer_atomics", issue = "32976")]
+impl RefUnwindSafe for atomic::AtomicI8 {}
+#[cfg(target_has_atomic = "16")]
+#[unstable(feature = "integer_atomics", issue = "32976")]
+impl RefUnwindSafe for atomic::AtomicI16 {}
+#[cfg(target_has_atomic = "32")]
+#[unstable(feature = "integer_atomics", issue = "32976")]
+impl RefUnwindSafe for atomic::AtomicI32 {}
+#[cfg(target_has_atomic = "64")]
+#[unstable(feature = "integer_atomics", issue = "32976")]
+impl RefUnwindSafe for atomic::AtomicI64 {}
+
+#[cfg(target_has_atomic = "ptr")]
+#[stable(feature = "unwind_safe_atomic_refs", since = "1.14.0")]
+impl RefUnwindSafe for atomic::AtomicUsize {}
+#[cfg(target_has_atomic = "8")]
+#[unstable(feature = "integer_atomics", issue = "32976")]
+impl RefUnwindSafe for atomic::AtomicU8 {}
+#[cfg(target_has_atomic = "16")]
+#[unstable(feature = "integer_atomics", issue = "32976")]
+impl RefUnwindSafe for atomic::AtomicU16 {}
+#[cfg(target_has_atomic = "32")]
+#[unstable(feature = "integer_atomics", issue = "32976")]
+impl RefUnwindSafe for atomic::AtomicU32 {}
+#[cfg(target_has_atomic = "64")]
+#[unstable(feature = "integer_atomics", issue = "32976")]
+impl RefUnwindSafe for atomic::AtomicU64 {}
+
+#[cfg(target_has_atomic = "8")]
+#[stable(feature = "unwind_safe_atomic_refs", since = "1.14.0")]
+impl RefUnwindSafe for atomic::AtomicBool {}
+
+#[cfg(target_has_atomic = "ptr")]
+#[stable(feature = "unwind_safe_atomic_refs", since = "1.14.0")]
+impl<T> RefUnwindSafe for atomic::AtomicPtr<T> {}
+
 #[stable(feature = "catch_unwind", since = "1.9.0")]
 impl<T> Deref for AssertUnwindSafe<T> {
     type Target = T;