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/* * SPDX-FileCopyrightText: Copyright (c) 2022-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved. * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef HOLOSCAN_CORE_DOMAIN_TENSOR_HPP #define HOLOSCAN_CORE_DOMAIN_TENSOR_HPP #include <dlpack/dlpack.h> #include <cstdint> #include <functional> #include <memory> #include <string> #include <vector> namespace holoscan { struct DLManagedTensorCtx { DLManagedTensor tensor; std::shared_ptr<void> memory_ref; }; class DLManagedMemoryBuffer { public: explicit DLManagedMemoryBuffer(DLManagedTensor* self); ~DLManagedMemoryBuffer(); private: DLManagedTensor* self_ = nullptr; }; class Tensor { public: Tensor() = default; explicit Tensor(std::shared_ptr<DLManagedTensorCtx>& ctx) : dl_ctx_(ctx) {} explicit Tensor(DLManagedTensor* dl_managed_tensor_ptr); virtual ~Tensor() = default; void* data() const { return dl_ctx_->tensor.dl_tensor.data; } DLDevice device() const { return dl_ctx_->tensor.dl_tensor.device; } DLDataType dtype() const { return dl_ctx_->tensor.dl_tensor.dtype; } std::vector<int64_t> shape() const; std::vector<int64_t> strides() const; int64_t size() const; int32_t ndim() const { return dl_ctx_->tensor.dl_tensor.ndim; } uint8_t itemsize() const { return (dl_ctx_->tensor.dl_tensor.dtype.bits * dl_ctx_->tensor.dl_tensor.dtype.lanes + 7) / 8; } int64_t nbytes() const { return size() * itemsize(); } DLManagedTensor* to_dlpack(); std::shared_ptr<DLManagedTensorCtx>& dl_ctx() { return dl_ctx_; } protected: std::shared_ptr<DLManagedTensorCtx> dl_ctx_; }; DLDevice dldevice_from_pointer(void* ptr); void calc_strides(const DLTensor& tensor, std::vector<int64_t>& strides, bool to_num_elements = false); DLDataType dldatatype_from_typestr(const std::string& typestr); const char* numpy_dtype(const DLDataType dtype); } // namespace holoscan #endif/* HOLOSCAN_CORE_DOMAIN_TENSOR_HPP */

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