Brandon Potter
109 baris
3.2 KiB
C++
109 baris
3.2 KiB
C++
/******************************************************************************
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* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*****************************************************************************/
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#ifndef LIBRARY_SRC_DEVICE_PROXY_HPP_
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#define LIBRARY_SRC_DEVICE_PROXY_HPP_
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#include <hip/hip_runtime.h>
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#include <memory>
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#include <utility>
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namespace rocshmem {
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template <typename ALLOCATOR, typename T, size_t SIZE_IN = 1>
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class DeviceProxy {
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public:
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DeviceProxy() {
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/*
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* Allocate memory and verify that the allocation worked.
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*/
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T* temp{nullptr};
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allocator_.allocate(reinterpret_cast<void**>(&temp), SIZE_BYTES_);
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assert(temp);
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/*
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* Default memory provided by the allocation to recognizable bytes.
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*/
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memset(static_cast<void*>(temp), 0xBC, SIZE_BYTES_);
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/*
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* Pass the memory into a unique ptr for tracking.
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*/
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std::unique_ptr<T, Deleter> up{temp};
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up_ = std::move(up);
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/*
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* Set a c-style ptr for access by the device.
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*/
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ptr_ = up_.get();
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}
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/**
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* @brief Return internal storage tracked by the Proxy.
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*
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* @note Do not try to free this memory yourself. The proxy maintains
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* the lifetime of the data itself.
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*/
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__host__ __device__ T* get() { return ptr_; }
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private:
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/**
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* @brief Internal Deleter functor is required by up_ member
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*/
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class Deleter {
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public:
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void operator()(void* x) { a_.deallocate(x); }
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private:
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ALLOCATOR a_;
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};
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/**
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* @brief Externally provided allocator type.
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*/
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ALLOCATOR allocator_{};
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/**
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* @brief Unique pointer for tracking the proxy.
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*/
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std::unique_ptr<T, Deleter> up_{nullptr};
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/**
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* @brief A handle to access the internal memory.
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*
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* In general, device code cannot access standard library routines
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* like std::unique_ptr::get(). Circumvent this problem by caching
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* the pointer manually in this class.
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*/
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T* ptr_{nullptr};
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/**
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* @brief The allocation size for the internal memory
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*/
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static constexpr size_t SIZE_BYTES_{sizeof(T) * SIZE_IN};
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};
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} // namespace rocshmem
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#endif // LIBRARY_SRC_DEVICE_PROXY_HPP_
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