4ce6a9b7a4
The C types in lite/c/c_api_internal.h are not actually internal, rather, they are common types used throughout the C++ and C APIs. Rename the header accordingly. PiperOrigin-RevId: 282494601 Change-Id: Ia784f35724d774db256ffcbbcdc5bb00e6574417
85 lines
3.3 KiB
C++
85 lines
3.3 KiB
C++
/* Copyright 2019 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_LITE_EXPERIMENTAL_RESOURCE_STATIC_HASHTABLE_H_
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#define TENSORFLOW_LITE_EXPERIMENTAL_RESOURCE_STATIC_HASHTABLE_H_
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#include <unordered_map>
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#include "tensorflow/lite/c/common.h"
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#include "tensorflow/lite/experimental/resource/lookup_interfaces.h"
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#include "tensorflow/lite/experimental/resource/lookup_util.h"
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#include "tensorflow/lite/experimental/resource/resource_base.h"
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#include "tensorflow/lite/kernels/internal/tensor_ctypes.h"
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#include "tensorflow/lite/string_util.h"
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namespace tflite {
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namespace resource {
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namespace internal {
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// A static hash table class. This hash table allows initialization one time in
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// its life cycle. This hash table implements Tensorflow core's HashTableV2 op.
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template <typename KeyType, typename ValueType>
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class StaticHashtable : public tflite::resource::LookupInterface {
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public:
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explicit StaticHashtable(TfLiteType key_type, TfLiteType value_type)
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: key_type_(key_type), value_type_(value_type) {}
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~StaticHashtable() override {}
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// Finds the corresponding value of the given keys tensor in the map and
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// copies the result data to the given values tensor. If there is no matching
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// value, it will write the default value into the matched position instead.
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TfLiteStatus Lookup(TfLiteContext* context, const TfLiteTensor* keys,
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TfLiteTensor* values,
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const TfLiteTensor* default_value) override;
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// Inserts the given key and value tensor data into the hash table.
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TfLiteStatus Import(TfLiteContext* context, const TfLiteTensor* keys,
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const TfLiteTensor* values) override;
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// Returns the item size of the hash table.
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size_t Size() override { return map_.size(); }
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TfLiteType GetKeyType() const override { return key_type_; }
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TfLiteType GetValueType() const override { return value_type_; }
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TfLiteStatus CheckKeyAndValueTypes(TfLiteContext* context,
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const TfLiteTensor* keys,
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const TfLiteTensor* values) override {
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TF_LITE_ENSURE_EQ(context, keys->type, key_type_);
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TF_LITE_ENSURE_EQ(context, values->type, value_type_);
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return kTfLiteOk;
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}
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// Returns true if the hash table is initialized.
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bool IsInitialized() override { return is_initialized_; }
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private:
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TfLiteType key_type_;
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TfLiteType value_type_;
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std::unordered_map<KeyType, ValueType> map_;
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bool is_initialized_ = false;
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};
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::tflite::resource::LookupInterface* CreateStaticHashtable(
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TfLiteType key_type, TfLiteType value_type);
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} // namespace internal
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} // namespace resource
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} // namespace tflite
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#endif // TENSORFLOW_LITE_EXPERIMENTAL_RESOURCE_STATIC_HASHTABLE_H_
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