From a432fc102df1fc9b0f14b2abda5f57ed3993de16 Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Mon, 12 Dec 2016 15:24:16 -0800
Subject: [PATCH] Moved the choice of ThreadPool to
 unsupported/Eigen/CXX11/ThreadPool

---
 unsupported/Eigen/CXX11/ThreadPool                   | 12 ++++++++++++
 .../Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h  | 11 -----------
 2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/unsupported/Eigen/CXX11/ThreadPool b/unsupported/Eigen/CXX11/ThreadPool
index 141372f63..c34614194 100644
--- a/unsupported/Eigen/CXX11/ThreadPool
+++ b/unsupported/Eigen/CXX11/ThreadPool
@@ -58,6 +58,18 @@
 #include "src/ThreadPool/SimpleThreadPool.h"
 #include "src/ThreadPool/NonBlockingThreadPool.h"
 
+
+// Use the more efficient NonBlockingThreadPool by default.
+namespace Eigen {
+#ifndef EIGEN_USE_SIMPLE_THREAD_POOL
+template <typename Env> using ThreadPoolTempl = NonBlockingThreadPoolTempl<Env>;
+typedef NonBlockingThreadPool ThreadPool;
+#else
+template <typename Env> using ThreadPoolTempl = SimpleThreadPoolTempl<Env>;
+typedef SimpleThreadPool ThreadPool;
+#endif
+}  // namespace Eigen
+
 #endif
 
 #include <Eigen/src/Core/util/ReenableStupidWarnings.h>
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h b/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h
index 210ae1368..16180ca69 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h
@@ -12,17 +12,6 @@
 
 namespace Eigen {
 
-// Use the SimpleThreadPool by default. We'll switch to the new non blocking
-// thread pool later.
-#ifndef EIGEN_USE_SIMPLE_THREAD_POOL
-template <typename Env> using ThreadPoolTempl = NonBlockingThreadPoolTempl<Env>;
-typedef NonBlockingThreadPool ThreadPool;
-#else
-template <typename Env> using ThreadPoolTempl = SimpleThreadPoolTempl<Env>;
-typedef SimpleThreadPool ThreadPool;
-#endif
-
-
 // Barrier is an object that allows one or more threads to wait until
 // Notify has been called a specified number of times.
 class Barrier {