From 7c548a2653becf8c7eb99dc78b3f2f013a7dc6a3 Mon Sep 17 00:00:00 2001
From: Jake Goulding <jake.goulding@gmail.com>
Date: Sat, 25 Apr 2015 22:55:15 -0400
Subject: [PATCH] Provide a Default implementation for AtomicPtr

Closes #24613
---
 src/libcore/atomic.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libcore/atomic.rs b/src/libcore/atomic.rs
index 02f9ee506f990..bcbf31617eeb6 100644
--- a/src/libcore/atomic.rs
+++ b/src/libcore/atomic.rs
@@ -129,6 +129,12 @@ pub struct AtomicPtr<T> {
     _marker: PhantomData<*mut T>,
 }
 
+impl<T> Default for AtomicPtr<T> {
+    fn default() -> AtomicPtr<T> {
+        AtomicPtr::new(::ptr::null_mut())
+    }
+}
+
 unsafe impl<T> Sync for AtomicPtr<T> {}
 
 /// Atomic memory orderings