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
75 lines
2.9 KiB
C++
75 lines
2.9 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_RESOURCE_VARIABLE_H_
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#define TENSORFLOW_LITE_EXPERIMENTAL_RESOURCE_RESOURCE_VARIABLE_H_
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#include "tensorflow/lite/c/common.h"
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#include "tensorflow/lite/experimental/resource/resource_base.h"
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namespace tflite {
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namespace resource {
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/// WARNING: Experimental interface, subject to change.
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// A resource variable class. It's similar to TensorFlow Resource
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// Variable, but it's identified with int32 ID in TFLite (instead of
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// using Resource handle like TensorFlow).
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//
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// TODO(b/137042749): TFLite converter cannot convert variables yet.
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// Variable functionalities are only tested with unit tests now.
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class ResourceVariable : public ResourceBase {
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public:
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ResourceVariable();
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ResourceVariable(ResourceVariable&& other);
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ResourceVariable(const ResourceVariable&) = delete;
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ResourceVariable& operator=(const ResourceVariable&) = delete;
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~ResourceVariable() override;
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// Assigns data from a tensor. Copies its type, shape and data over.
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TfLiteStatus AssignFrom(const TfLiteTensor* tensor);
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// Get the data tensor stored in the resource variable.
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// Returns `nullptr` if the variable is never initialized by calling
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// `AssignFrom`.
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TfLiteTensor* GetTensor() { return is_initialized_ ? &tensor_ : nullptr; }
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// Returns true if this resource variable is initialized.
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bool IsInitialized() override { return is_initialized_; }
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private:
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// The tensor (and its buffer stored in `tensor_.data` is fully owned by
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// the `ResourceVariable` object.
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TfLiteTensor tensor_;
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// True if `AssignFrom` function is every called.
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// False if and only if `tensor_` is filled with zeros.
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bool is_initialized_ = false;
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};
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// Creates a resource variable, shared among all the subgraphs with the given
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// resource id if there is an existing one.
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// WARNING: Experimental interface, subject to change.
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void CreateResourceVariableIfNotAvailable(ResourceMap* resources,
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int resource_id);
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// Returns the corresponding resource variable, or nullptr if none.
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// WARNING: Experimental interface, subject to change.
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ResourceVariable* GetResourceVariable(ResourceMap* resources, int resource_id);
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} // namespace resource
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} // namespace tflite
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#endif // TENSORFLOW_LITE_EXPERIMENTAL_RESOURCE_RESOURCE_VARIABLE_H_
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