From 8529d75b81d20ebbf0d2d9d78a4b09bbe9d15932 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Sun, 23 Aug 2015 22:27:33 +0200
Subject: [PATCH 1/2] Add Send/Sync traits on LookupHost struct

---
 src/libstd/sys/common/net.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libstd/sys/common/net.rs b/src/libstd/sys/common/net.rs
index 68d5f49dffac4..67e1099c29540 100644
--- a/src/libstd/sys/common/net.rs
+++ b/src/libstd/sys/common/net.rs
@@ -110,6 +110,9 @@ impl Iterator for LookupHost {
     }
 }
 
+unsafe impl Sync for LookupHost {}
+unsafe impl Send for LookupHost {}
+
 impl Drop for LookupHost {
     fn drop(&mut self) {
         unsafe { freeaddrinfo(self.original) }

From 528d99c014f551f44892e65058798c8c2f59ac74 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Mon, 24 Aug 2015 23:01:31 +0200
Subject: [PATCH 2/2] Add test for LookupHost iterator Send/Sync traits

---
 src/test/run-pass/sync-send-in-std.rs | 31 +++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 src/test/run-pass/sync-send-in-std.rs

diff --git a/src/test/run-pass/sync-send-in-std.rs b/src/test/run-pass/sync-send-in-std.rs
new file mode 100644
index 0000000000000..85ab59a298323
--- /dev/null
+++ b/src/test/run-pass/sync-send-in-std.rs
@@ -0,0 +1,31 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(lookup_host)]
+
+use std::net::lookup_host;
+
+fn is_sync<T>(_: T) where T: Sync {}
+fn is_send<T>(_: T) where T: Send {}
+
+macro_rules! all_sync_send {
+    ($ctor:expr, $($iter:ident),+) => ({
+        $(
+            let mut x = $ctor;
+            is_sync(x.$iter());
+            let mut y = $ctor;
+            is_send(y.$iter());
+        )+
+    })
+}
+
+fn main() {
+    all_sync_send!(lookup_host("localhost").unwrap(), next);
+}