1 | /* Copyright 2019 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 | #include <stdint.h> |
17 | |
18 | #include "tensorflow/lite/c/common.h" |
19 | #include "tensorflow/lite/core/subgraph.h" |
20 | #include "tensorflow/lite/experimental/resource/resource_variable.h" |
21 | #include "tensorflow/lite/kernels/internal/tensor.h" |
22 | #include "tensorflow/lite/kernels/kernel_util.h" |
23 | |
24 | namespace tflite { |
25 | namespace ops { |
26 | namespace builtin { |
27 | namespace assign_variable { |
28 | |
29 | constexpr int kInputVariableId = 0; |
30 | constexpr int kInputValue = 1; |
31 | |
32 | TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) { |
33 | TF_LITE_ENSURE_EQ(context, NumInputs(node), 2); |
34 | TF_LITE_ENSURE_EQ(context, NumOutputs(node), 0); |
35 | |
36 | const TfLiteTensor* input_resource_id_tensor; |
37 | TF_LITE_ENSURE_OK(context, GetInputSafe(context, node, kInputVariableId, |
38 | &input_resource_id_tensor)); |
39 | TF_LITE_ENSURE(context, (input_resource_id_tensor->type == kTfLiteResource || |
40 | input_resource_id_tensor->type == kTfLiteInt32)); |
41 | TF_LITE_ENSURE_EQ(context, NumElements(input_resource_id_tensor), 1); |
42 | |
43 | return kTfLiteOk; |
44 | } |
45 | |
46 | TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) { |
47 | Subgraph* subgraph = reinterpret_cast<Subgraph*>(context->impl_); |
48 | |
49 | const TfLiteTensor* input_resource_id_tensor; |
50 | TF_LITE_ENSURE_OK(context, GetInputSafe(context, node, kInputVariableId, |
51 | &input_resource_id_tensor)); |
52 | const TfLiteTensor* input_value_tensor; |
53 | TF_LITE_ENSURE_OK( |
54 | context, GetInputSafe(context, node, kInputValue, &input_value_tensor)); |
55 | |
56 | int resource_id = input_resource_id_tensor->data.i32[0]; |
57 | auto& resources = subgraph->resources(); |
58 | resource::CreateResourceVariableIfNotAvailable(&resources, resource_id); |
59 | auto* variable = resource::GetResourceVariable(&resources, resource_id); |
60 | TF_LITE_ENSURE(context, variable != nullptr); |
61 | variable->AssignFrom(input_value_tensor); |
62 | |
63 | return kTfLiteOk; |
64 | } |
65 | |
66 | } // namespace assign_variable |
67 | |
68 | TfLiteRegistration* Register_ASSIGN_VARIABLE() { |
69 | static TfLiteRegistration r = {nullptr, nullptr, assign_variable::Prepare, |
70 | assign_variable::Eval}; |
71 | return &r; |
72 | } |
73 | |
74 | } // namespace builtin |
75 | } // namespace ops |
76 | } // namespace tflite |
77 | |