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/*
* Copyright 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.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/detail/execute_with_allocator_fwd.h>
#include <thrust/detail/alignment.h>
#if THRUST_CPP_DIALECT >= 2011
#include <type_traits>
#endif
THRUST_NAMESPACE_BEGIN
namespace mr
{
template<typename T, class MR>
class allocator;
}
namespace detail
{
template<template <typename> class ExecutionPolicyCRTPBase>
struct allocator_aware_execution_policy
{
template<typename MemoryResource>
struct execute_with_memory_resource_type
{
typedef thrust::detail::execute_with_allocator<
thrust::mr::allocator<
thrust::detail::max_align_t,
MemoryResource
>,
ExecutionPolicyCRTPBase
> type;
};
template<typename Allocator>
struct execute_with_allocator_type
{
typedef thrust::detail::execute_with_allocator<
Allocator,
ExecutionPolicyCRTPBase
> type;
};
template<typename MemoryResource>
typename execute_with_memory_resource_type<MemoryResource>::type
operator()(MemoryResource * mem_res) const
{
return typename execute_with_memory_resource_type<MemoryResource>::type(mem_res);
}
template<typename Allocator>
typename execute_with_allocator_type<Allocator&>::type
operator()(Allocator &alloc) const
{
return typename execute_with_allocator_type<Allocator&>::type(alloc);
}
template<typename Allocator>
typename execute_with_allocator_type<Allocator>::type
operator()(const Allocator &alloc) const
{
return typename execute_with_allocator_type<Allocator>::type(alloc);
}
#if THRUST_CPP_DIALECT >= 2011
// just the rvalue overload
// perfect forwarding doesn't help, because a const reference has to be turned
// into a value by copying for the purpose of storing it in execute_with_allocator
template<typename Allocator,
typename std::enable_if<!std::is_lvalue_reference<Allocator>::value>::type * = nullptr>
typename execute_with_allocator_type<Allocator>::type
operator()(Allocator &&alloc) const
{
return typename execute_with_allocator_type<Allocator>::type(std::move(alloc));
}
#endif
};
} // end namespace detail
THRUST_NAMESPACE_END
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