derek.holloway
7502bf64a4
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64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
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* Copyright 2008-2018 NVIDIA Corporation
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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/*! \file device_make_unique.h
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* \brief A factory function for creating `unique_ptr`s to device objects.
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*/
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#pragma once
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#include <thrust/detail/config.h>
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#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
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# pragma GCC system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
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# pragma clang system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
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# pragma system_header
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#endif // no system header
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#include <thrust/allocate_unique.h>
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#include <thrust/detail/type_deduction.h>
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#include <thrust/device_allocator.h>
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#include <thrust/device_new.h>
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#include <thrust/device_ptr.h>
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#if !_THRUST_HAS_DEVICE_SYSTEM_STD
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# include <utility>
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#endif
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THRUST_NAMESPACE_BEGIN
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///////////////////////////////////////////////////////////////////////////////
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/*! \brief A factory function for creating `unique_ptr`s to a newly allocated object in device
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* memory.
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*/
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template <typename T, typename... Args>
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THRUST_HOST auto device_make_unique(Args&&... args)
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-> decltype(uninitialized_allocate_unique<T>(_THRUST_STD::declval<device_allocator<T>>()))
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{
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// FIXME: This is crude - we construct an unnecessary T on the host for
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// `device_new`. We need a proper dispatched `construct` algorithm to
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// do this properly.
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auto p = uninitialized_allocate_unique<T>(device_allocator<T>());
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device_new<T>(p.get(), T(THRUST_FWD(args)...));
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return p;
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}
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///////////////////////////////////////////////////////////////////////////////
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THRUST_NAMESPACE_END
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