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85 lines
3.2 KiB
C++
85 lines
3.2 KiB
C++
/***************************************************************************************************
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* Copyright (c) 2025 - 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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**************************************************************************************************/
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#include <cstdint>
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#include <nanobind/nanobind.h>
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#include <nanobind/stl/string.h>
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#include <nanobind/stl/vector.h>
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namespace nb = nanobind;
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// Forward declaration of the MockTensor struct for testing only
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struct MockTensor {
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void *ptr;
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struct {
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int32_t shape[3];
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} shape;
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struct {
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int32_t strides[3];
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} strides;
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};
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NB_MODULE(tensor, m) {
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// create a tensor for testing
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m.def("make_tensor", [](int64_t ptr, std::vector<int32_t> shape,
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std::vector<int32_t> strides) {
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auto *tensor = new MockTensor();
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tensor->ptr = reinterpret_cast<void *>(ptr);
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assert(shape.size() == 3 && "shape must have 3 elements");
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assert(strides.size() == 3 && "strides must have 3 elements");
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for (size_t i = 0; i < shape.size(); i++) {
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tensor->shape.shape[i] = shape[i];
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tensor->strides.strides[i] = strides[i];
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}
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return nb::steal(PyCapsule_New(tensor, "tensor", [](PyObject *capsule) {
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auto n = PyCapsule_GetName(capsule);
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if (void *p = PyCapsule_GetPointer(capsule, n)) {
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delete reinterpret_cast<MockTensor *>(p);
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}
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}));
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});
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m.def(
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"pycapsule_get_pointer",
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[](nb::object &capsule) {
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void *ptr = PyCapsule_GetPointer(capsule.ptr(), "tensor");
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if (!ptr) {
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throw std::runtime_error("Invalid tensor capsule");
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}
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return reinterpret_cast<uintptr_t>(ptr);
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},
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"Get pointer from PyCapsule");
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}
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