1 /* Copyright 2020 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 #ifndef TENSORFLOW_C_EXPERIMENTAL_GRADIENTS_NOT_DIFFERENTIABLE_H_ 16 #define TENSORFLOW_C_EXPERIMENTAL_GRADIENTS_NOT_DIFFERENTIABLE_H_ 17 18 #include "tensorflow/c/eager/abstract_context.h" 19 #include "tensorflow/c/eager/gradients.h" 20 21 namespace tensorflow { 22 namespace gradients { 23 // Ignores `grad_outputs` and sets all entries in grad_inputs to nullptr. 24 class NotDifferentiableGradientFunction : public GradientFunction { 25 Status Compute(AbstractContext* ctx, 26 absl::Span<AbstractTensorHandle* const> grad_outputs, 27 absl::Span<AbstractTensorHandle*> grad_inputs) override; 28 }; 29 // Shorthand for registry->Register(op, new NotDifferentiableGradientFunction) 30 Status RegisterNotDifferentiable(GradientRegistry* registry, const string& op); 31 } // namespace gradients 32 } // namespace tensorflow 33 34 #endif // TENSORFLOW_C_EXPERIMENTAL_GRADIENTS_NOT_DIFFERENTIABLE_H_ 35