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/*
* Copyright 2008-2020 NVIDIA Corporation
*
* 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.
*/
/*! \file universal_allocator.h
* \brief An allocator which creates new elements in memory accessible to both
* hosts and devices.
*/
#pragma once
#include <thrust/detail/config.h>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
// #include the device system's vector header
#define __THRUST_DEVICE_SYSTEM_MEMORY_HEADER <__THRUST_DEVICE_SYSTEM_ROOT/memory.h>
#include __THRUST_DEVICE_SYSTEM_MEMORY_HEADER
#undef __THRUST_DEVICE_SYSTEM_MEMORY_HEADER
THRUST_NAMESPACE_BEGIN
/** \addtogroup memory_resources Memory Resources
* \ingroup memory_management_classes
* \{
*/
/*! \brief An allocator which creates new elements in memory accessible by
* both hosts and devices.
*
* \see https://en.cppreference.com/w/cpp/named_req/Allocator
*/
using thrust::system::__THRUST_DEVICE_SYSTEM_NAMESPACE::universal_allocator;
/*! \p universal_ptr stores a pointer to an object allocated in memory accessible
* to both hosts and devices.
*
* Algorithms dispatched with this type of pointer will be dispatched to
* either host or device, depending on which backend you are using. Explicit
* policies (\p thrust::device, etc) can be used to specify where an algorithm
* should be run.
*
* \p universal_ptr has pointer semantics: it may be dereferenced safely from
* both hosts and devices and may be manipulated with pointer arithmetic.
*
* \p universal_ptr can be created with \p universal_allocator or by explicitly
* calling its constructor with a raw pointer.
*
* The raw pointer encapsulated by a \p universal_ptr may be obtained by
* either its <tt>get</tt> method or the \p raw_pointer_cast free function.
*
* \note \p universal_ptr is not a smart pointer; it is the programmer's
* responsibility to deallocate memory pointed to by \p universal_ptr.
*
* \see host_ptr For the documentation of the complete interface which is
* shared by \p universal_ptr.
* \see raw_pointer_cast
*/
template <typename T>
using universal_ptr =
thrust::system::__THRUST_DEVICE_SYSTEM_NAMESPACE::universal_pointer<T>;
/*! \}
*/
THRUST_NAMESPACE_END
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