From c372fa55560f1cdfdcb566f3027689ba88c46da5 Mon Sep 17 00:00:00 2001
From: Jason Toffaletti <jason@topsy.com>
Date: Mon, 7 Oct 2013 00:43:34 -0700
Subject: [PATCH] add padding to prevent false sharing

---
 src/libstd/rt/mpmc_bounded_queue.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/libstd/rt/mpmc_bounded_queue.rs b/src/libstd/rt/mpmc_bounded_queue.rs
index 8e6ac8f79c7..c0c7d281136 100644
--- a/src/libstd/rt/mpmc_bounded_queue.rs
+++ b/src/libstd/rt/mpmc_bounded_queue.rs
@@ -40,10 +40,14 @@ struct Node<T> {
 }
 
 struct State<T> {
+    pad0: [u8, ..64],
     buffer: ~[Node<T>],
     mask: uint,
+    pad1: [u8, ..64],
     enqueue_pos: AtomicUint,
+    pad2: [u8, ..64],
     dequeue_pos: AtomicUint,
+    pad3: [u8, ..64],
 }
 
 struct Queue<T> {
@@ -62,10 +66,14 @@ impl<T: Send> State<T> {
             Node{sequence:AtomicUint::new(i),value:None}
         };
         State{
+            pad0: [0, ..64],
             buffer: buffer,
             mask: capacity-1,
+            pad1: [0, ..64],
             enqueue_pos: AtomicUint::new(0),
+            pad2: [0, ..64],
             dequeue_pos: AtomicUint::new(0),
+            pad3: [0, ..64],
         }
     }