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