Clean up the Tensor header and get rid of the EIGEN_SLEEP macro.

unsupported/Eigen/CXX11/Tensor

@@ -33,10 +33,13 @@
   * Much of the documentation can be found \ref eigen_tensors "here".
   */
 
+#include <atomic>
+#include <chrono>
 #include <cmath>
 #include <cstddef>
 #include <cstring>
 #include <random>
+#include <thread>
 
 #ifdef _WIN32
 typedef __int16 int16_t;
@@ -48,7 +51,6 @@ typedef unsigned __int64 uint64_t;
 #include <windows.h>
 #else
 #include <stdint.h>
-#include <unistd.h>
 #endif
 
 #ifdef _WIN32
@@ -70,8 +72,6 @@ typedef unsigned __int64 uint64_t;
   #else
     #include <cuda_runtime.h>
   #endif
-  #include <atomic>
-  #include <unistd.h>
 #endif
 
 #include "src/Tensor/TensorMacros.h"

unsupported/Eigen/CXX11/src/Tensor/TensorDeviceGpu.h

@@ -83,7 +83,7 @@ static void initializeDeviceProp() {
       // Wait for the other thread to inititialize the properties.
       while (!m_devicePropInitialized) {
         std::atomic_thread_fence(std::memory_order_acquire);
-        EIGEN_SLEEP(1000);
+        std::this_thread::sleep_for(std::chrono::milliseconds(1000));
       }
     }
   }

unsupported/Eigen/CXX11/src/Tensor/TensorMacros.h

@@ -43,15 +43,6 @@
 #define EIGEN_SFINAE_ENABLE_IF( __condition__ ) \
     typename internal::enable_if< ( __condition__ ) , int >::type = 0
 
-
-#if EIGEN_OS_WIN || EIGEN_OS_WIN64
-#define EIGEN_SLEEP(n) Sleep(n)
-#elif EIGEN_OS_GNULINUX
-#define EIGEN_SLEEP(n) usleep(n * 1000);
-#else
-#define EIGEN_SLEEP(n) sleep(std::max<unsigned>(1, n/1000))
-#endif
-
 // Define a macro to use a reference on the host but a value on the device
 #if defined(SYCL_DEVICE_ONLY)
   #define EIGEN_DEVICE_REF

unsupported/test/cxx11_non_blocking_thread_pool.cpp

@@ -109,7 +109,9 @@ static void test_cancel()
   // Schedule a large number of closure that each sleeps for one second. This
   // will keep the thread pool busy for much longer than the default test timeout.
   for (int i = 0; i < 1000; ++i) {
-    tp.Schedule([]() { EIGEN_SLEEP(2000); });
+    tp.Schedule([]() {
+      std::this_thread::sleep_for(std::chrono::milliseconds(2000));
+    });
   }
 
   // Cancel the processing of all the closures that are still pending.

unsupported/test/cxx11_tensor_notification.cpp

@@ -23,7 +23,7 @@ static void test_notification_single()
   Eigen::Notification n;
   auto func = [&n, &counter](){ n.Wait(); ++counter;};
   thread_pool.Schedule(func);
-  EIGEN_SLEEP(1000);
+  std::this_thread::sleep_for(std::chrono::milliseconds(1000));
 
   // The thread should be waiting for the notification.
   VERIFY_IS_EQUAL(counter, 0);
@@ -31,7 +31,7 @@ static void test_notification_single()
   // Unblock the thread
   n.Notify();
 
-  EIGEN_SLEEP(1000);
+  std::this_thread::sleep_for(std::chrono::milliseconds(1000));
 
   // Verify the counter has been incremented
   VERIFY_IS_EQUAL(counter, 1);
@@ -50,10 +50,10 @@ static void test_notification_multiple()
   thread_pool.Schedule(func);
   thread_pool.Schedule(func);
   thread_pool.Schedule(func);
-  EIGEN_SLEEP(1000);
+  std::this_thread::sleep_for(std::chrono::milliseconds(1000));
   VERIFY_IS_EQUAL(counter, 0);
   n.Notify();
-  EIGEN_SLEEP(1000);
+  std::this_thread::sleep_for(std::chrono::milliseconds(1000));
   VERIFY_IS_EQUAL(counter, 4);
 }