From bc66c88255a29460fb26dde0a8558db6a3524cd5 Mon Sep 17 00:00:00 2001
From: Eugene Zhulenev <ezhulenev@google.com>
Date: Tue, 26 Nov 2019 11:41:57 -0800
Subject: Add async evaluation support to
 TensorPadding/TensorImagePatch/TensorShuffling

---
 unsupported/Eigen/CXX11/src/Tensor/TensorPadding.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorPadding.h')

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorPadding.h b/unsupported/Eigen/CXX11/src/Tensor/TensorPadding.h
index 4a22922d9..4d1a09ada 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorPadding.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorPadding.h
@@ -155,6 +155,15 @@ struct TensorEvaluator<const TensorPaddingOp<PaddingDimensions, ArgType>, Device
     m_impl.evalSubExprsIfNeeded(NULL);
     return true;
   }
+
+#ifdef EIGEN_USE_THREADS
+  template <typename EvalSubExprsCallback>
+  EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void evalSubExprsIfNeededAsync(
+      EvaluatorPointerType, EvalSubExprsCallback done) {
+    m_impl.evalSubExprsIfNeededAsync(nullptr, [done](bool) { done(true); });
+  }
+#endif  // EIGEN_USE_THREADS
+
   EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void cleanup() {
     m_impl.cleanup();
   }
-- 
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