wehub-resource-sync
84 lines
2.9 KiB
C++
84 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_PYTHON_INTERPRETER_WRAPPER_NUMPY_H_
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#define TENSORFLOW_LITE_PYTHON_INTERPRETER_WRAPPER_NUMPY_H_
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#ifdef PyArray_Type
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#error "Numpy cannot be included before numpy.h."
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#endif
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// Disallow Numpy 1.7 deprecated symbols.
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#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
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// To handle PyArray_* calles, numpy defines a static lookup table called
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// PyArray_API, or PY_ARRAY_UNIQUE_SYMBOL, if defined. This causes the
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// PyArray_* pointers to be different for different translation units, unless
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// we take care of selectivel defined NO_IMPORT_ARRAY.
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//
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// Virtually every usage will define NO_IMPORT_ARRAY, and will have access to
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// the lookup table via:
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// extern void **PyArray_API;
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// In numpy.cc we will define TFLITE_IMPORT_NUMPY, effectively disabling that
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// and instead using:
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// void **PyArray_API;
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// which is initialized when ImportNumpy() is called.
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//
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// If we don't define PY_ARRAY_UNIQUE_SYMBOL then PyArray_API is a static
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// variable, which causes strange crashes when the pointers are used across
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// translation unit boundaries.
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//
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// For more info see https://sourceforge.net/p/numpy/mailman/message/5700519
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// See also tensorflow/compiler/xla/tsl/python/lib/core/numpy.h for a similar
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// approach.
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#define PY_ARRAY_UNIQUE_SYMBOL _tflite_numpy_api
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#ifndef TFLITE_IMPORT_NUMPY
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#define NO_IMPORT_ARRAY
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#endif
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#include <Python.h>
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#include "numpy/arrayobject.h" // IWYU pragma: export
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#include "numpy/ufuncobject.h" // IWYU pragma: export
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#include "tensorflow/lite/core/c/common.h"
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#include "tensorflow/lite/string_util.h"
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namespace tflite {
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namespace python {
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void ImportNumpy();
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} // namespace python
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namespace python_utils {
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int TfLiteTypeToPyArrayType(TfLiteType tf_lite_type);
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TfLiteType TfLiteTypeFromPyType(int py_type);
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TfLiteType TfLiteTypeFromPyArray(PyArrayObject* array);
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bool FillStringBufferWithPyArray(PyObject* value,
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DynamicBuffer* dynamic_buffer);
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// Helper function to pack int8/uint8 numpy array data into an INT4/UINT4
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// tensor.
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PyObject* Set4BitTensor(TfLiteTensor* tensor, PyArrayObject* array,
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int tensor_index);
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} // namespace python_utils
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} // namespace tflite
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#endif // TENSORFLOW_LITE_PYTHON_INTERPRETER_WRAPPER_NUMPY_H_
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