1/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#ifndef TENSORFLOW_CORE_KERNELS_HOST_CONSTANT_OP_H_
17#define TENSORFLOW_CORE_KERNELS_HOST_CONSTANT_OP_H_
18
19#include "third_party/eigen3/unsupported/Eigen/CXX11/Tensor"
20#include "tensorflow/core/framework/op_kernel.h"
21#include "tensorflow/core/framework/tensor_types.h"
22#include "tensorflow/core/platform/macros.h"
23
24namespace tensorflow {
25
26// HostConstantOp differs from ConstantOp in that its output is always
27// in host memory.
28class _HostConstantOp : public OpKernel {
29 public:
30 explicit _HostConstantOp(OpKernelConstruction* ctx);
31 void Compute(OpKernelContext* ctx) override;
32 bool IsExpensive() override { return false; }
33 const Tensor* const_tensor() const override { return &tensor_; };
34 ~_HostConstantOp() override {}
35
36 private:
37 Tensor tensor_;
38 TF_DISALLOW_COPY_AND_ASSIGN(_HostConstantOp);
39};
40
41} // namespace tensorflow
42
43#endif // TENSORFLOW_CORE_KERNELS_HOST_CONSTANT_OP_H_
44