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/*
* Copyright 2008-2018 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 thrust/system/cuda/memory.h
* \brief Managing memory associated with Thrust's CUDA system.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/system/cuda/memory_resource.h>
#include <thrust/memory.h>
#include <thrust/detail/type_traits.h>
#include <thrust/mr/allocator.h>
#include <ostream>
THRUST_NAMESPACE_BEGIN
namespace cuda_cub
{
/*! Allocates an area of memory available to Thrust's <tt>cuda</tt> system.
* \param n Number of bytes to allocate.
* \return A <tt>cuda::pointer<void></tt> pointing to the beginning of the newly
* allocated memory. A null <tt>cuda::pointer<void></tt> is returned if
* an error occurs.
* \note The <tt>cuda::pointer<void></tt> returned by this function must be
* deallocated with \p cuda::free.
* \see cuda::free
* \see std::malloc
*/
inline __host__ __device__ pointer<void> malloc(std::size_t n);
/*! Allocates a typed area of memory available to Thrust's <tt>cuda</tt> system.
* \param n Number of elements to allocate.
* \return A <tt>cuda::pointer<T></tt> pointing to the beginning of the newly
* allocated elements. A null <tt>cuda::pointer<T></tt> is returned if
* an error occurs.
* \note The <tt>cuda::pointer<T></tt> returned by this function must be
* deallocated with \p cuda::free.
* \see cuda::free
* \see std::malloc
*/
template <typename T>
inline __host__ __device__ pointer<T> malloc(std::size_t n);
/*! Deallocates an area of memory previously allocated by <tt>cuda::malloc</tt>.
* \param ptr A <tt>cuda::pointer<void></tt> pointing to the beginning of an area
* of memory previously allocated with <tt>cuda::malloc</tt>.
* \see cuda::malloc
* \see std::free
*/
inline __host__ __device__ void free(pointer<void> ptr);
/*! \p cuda::allocator is the default allocator used by the \p cuda system's
* containers such as <tt>cuda::vector</tt> if no user-specified allocator is
* provided. \p cuda::allocator allocates (deallocates) storage with \p
* cuda::malloc (\p cuda::free).
*/
template<typename T>
using allocator = thrust::mr::stateless_resource_allocator<
T, thrust::system::cuda::memory_resource
>;
/*! \p cuda::universal_allocator allocates memory that can be used by the \p cuda
* system and host systems.
*/
template<typename T>
using universal_allocator = thrust::mr::stateless_resource_allocator<
T, thrust::system::cuda::universal_memory_resource
>;
} // namespace cuda_cub
namespace system { namespace cuda
{
using thrust::cuda_cub::malloc;
using thrust::cuda_cub::free;
using thrust::cuda_cub::allocator;
using thrust::cuda_cub::universal_allocator;
}} // namespace system::cuda
/*! \namespace thrust::cuda
* \brief \p thrust::cuda is a top-level alias for \p thrust::system::cuda.
*/
namespace cuda
{
using thrust::cuda_cub::malloc;
using thrust::cuda_cub::free;
using thrust::cuda_cub::allocator;
using thrust::cuda_cub::universal_allocator;
} // namespace cuda
THRUST_NAMESPACE_END
#include <thrust/system/cuda/detail/memory.inl>
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