1 /* Copyright 2018 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 16 #ifndef TENSORFLOW_CORE_GRAPPLER_OPTIMIZERS_DATA_OPTIMIZER_BASE_H_ 17 #define TENSORFLOW_CORE_GRAPPLER_OPTIMIZERS_DATA_OPTIMIZER_BASE_H_ 18 19 #include "tensorflow/core/grappler/optimizers/custom_graph_optimizer.h" 20 21 namespace tensorflow { 22 namespace grappler { 23 24 // A base class for tf.data optimizers. 25 class TFDataOptimizerBase : public CustomGraphOptimizer { 26 public: 27 struct OptimizationStats { 28 // Identifies the number of independent graph changes for an optimization. 29 int64_t num_changes = 0; 30 }; 31 32 TFDataOptimizerBase() = default; 33 ~TFDataOptimizerBase() override = default; 34 35 Status Optimize(Cluster* cluster, const GrapplerItem& item, 36 GraphDef* output) final; 37 38 virtual Status OptimizeAndCollectStats(Cluster* cluster, 39 const GrapplerItem& item, 40 GraphDef* output, 41 OptimizationStats* stats) = 0; 42 }; 43 44 } // namespace grappler 45 } // namespace tensorflow 46 47 #endif // TENSORFLOW_CORE_GRAPPLER_OPTIMIZERS_DATA_OPTIMIZER_BASE_H_ 48