From 002cf0d1c979857e057879d8c84b92439dbcc90d Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Tue, 22 Mar 2016 15:24:23 -0700
Subject: Use a single Barrier instead of a collection of Notifications to
 reduce the thread synchronization overhead

---
 unsupported/Eigen/CXX11/Tensor | 1 +
 1 file changed, 1 insertion(+)

(limited to 'unsupported/Eigen/CXX11/Tensor')

diff --git a/unsupported/Eigen/CXX11/Tensor b/unsupported/Eigen/CXX11/Tensor
index 969f25481..16132398d 100644
--- a/unsupported/Eigen/CXX11/Tensor
+++ b/unsupported/Eigen/CXX11/Tensor
@@ -51,6 +51,7 @@ typedef unsigned __int64 uint64_t;
 #endif
 
 #ifdef EIGEN_USE_THREADS
+#include <atomic>
 #include <condition_variable>
 #include <deque>
 #include <mutex>
-- 
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