83 lines
3.0 KiB
C++
83 lines
3.0 KiB
C++
/* Copyright 2015 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#ifndef TENSORFLOW_C_CHECKPOINT_READER_H_
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#define TENSORFLOW_C_CHECKPOINT_READER_H_
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#include <memory>
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#include <string>
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#include "tensorflow/c/tf_status_helper.h"
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#include "tensorflow/core/framework/tensor_shape.h"
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#include "tensorflow/core/platform/status.h"
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#include "tensorflow/core/platform/types.h"
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#include "tensorflow/core/util/tensor_bundle/tensor_bundle.h"
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#include "tensorflow/core/util/tensor_slice_reader.h"
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namespace tensorflow {
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namespace checkpoint {
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class TensorSliceReader;
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// A wrapper around BundleReader (for V2 checkpoints) and
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// checkpoint::TensorSliceReader (for V1), that is more easily SWIG wrapped for
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// other languages.
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//
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// The class currently only interacts with single-slice (i.e., non-partitioned)
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// variables.
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class CheckpointReader {
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public:
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CheckpointReader(const string& filename, TF_Status* status);
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bool HasTensor(const string& name) const;
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const string DebugString() const;
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// Returns a map from variable names to their shapes. Slices of a partitioned
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// tensor are combined into a single entry.
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const TensorSliceReader::VarToShapeMap& GetVariableToShapeMap() const;
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// Returns a map from variable names to their data types. Slices of a
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// partitioned tensor are combined into a single entry.
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const TensorSliceReader::VarToDataTypeMap& GetVariableToDataTypeMap() const;
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// Attempts to look up the tensor named "name" and stores the found result in
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// "out_tensor".
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void GetTensor(const string& name,
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std::unique_ptr<tensorflow::Tensor>* out_tensor,
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TF_Status* out_status) const;
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private:
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// Uses "v2_reader_" to build "var name -> shape" and "var name -> data type"
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// maps; both owned by caller.
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// REQUIRES: "v2_reader_ != nullptr && v2_reader_.status().ok()".
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std::pair<std::unique_ptr<TensorSliceReader::VarToShapeMap>,
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std::unique_ptr<TensorSliceReader::VarToDataTypeMap> >
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BuildV2VarMaps();
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// Invariant: exactly one of "reader_" and "v2_reader_" is non-null.
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std::unique_ptr<TensorSliceReader> reader_;
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std::unique_ptr<BundleReader> v2_reader_;
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std::unique_ptr<TensorSliceReader::VarToShapeMap> var_to_shape_map_;
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std::unique_ptr<TensorSliceReader::VarToDataTypeMap> var_to_data_type_map_;
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TF_DISALLOW_COPY_AND_ASSIGN(CheckpointReader);
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};
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} // namespace checkpoint
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} // namespace tensorflow
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#endif // TENSORFLOW_C_CHECKPOINT_READER_H_
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