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105 lines
2.7 KiB
105 lines
2.7 KiB
/* |
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* Copyright 2008-2012 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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#include <thrust/detail/config.h> |
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#include <thrust/detail/allocator/allocator_traits.h> |
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#include <thrust/detail/type_traits.h> |
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#include <thrust/detail/type_traits/pointer_traits.h> |
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#include <thrust/for_each.h> |
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#include <thrust/uninitialized_fill.h> |
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namespace thrust |
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{ |
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namespace detail |
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{ |
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namespace allocator_traits_detail |
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{ |
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template<typename Allocator> |
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struct construct1_via_allocator |
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{ |
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Allocator &a; |
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construct1_via_allocator(Allocator &a) |
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: a(a) |
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{} |
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template<typename T> |
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inline __host__ __device__ |
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void operator()(T &x) |
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{ |
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allocator_traits<Allocator>::construct(a, &x); |
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} |
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}; |
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template<typename Allocator, typename T> |
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struct needs_default_construct_via_allocator |
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: has_member_construct1< |
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Allocator, |
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T |
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> |
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{}; |
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// we know that std::allocator::construct's only effect is to call T's |
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// default constructor, so we needn't use it for default construction |
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template<typename U, typename T> |
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struct needs_default_construct_via_allocator<std::allocator<U>, T> |
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: thrust::detail::false_type |
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{}; |
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template<typename Allocator, typename Pointer, typename Size> |
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typename enable_if< |
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needs_default_construct_via_allocator< |
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Allocator, |
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typename pointer_element<Pointer>::type |
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>::value |
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>::type |
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default_construct_range(Allocator &a, Pointer p, Size n) |
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{ |
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thrust::for_each_n(allocator_system<Allocator>::get(a), p, n, construct1_via_allocator<Allocator>(a)); |
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} |
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template<typename Allocator, typename Pointer, typename Size> |
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typename disable_if< |
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needs_default_construct_via_allocator< |
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Allocator, |
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typename pointer_element<Pointer>::type |
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>::value |
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>::type |
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default_construct_range(Allocator &a, Pointer p, Size n) |
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{ |
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thrust::uninitialized_fill_n(allocator_system<Allocator>::get(a), p, n, typename pointer_element<Pointer>::type()); |
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} |
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} // end allocator_traits_detail |
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template<typename Allocator, typename Pointer, typename Size> |
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void default_construct_range(Allocator &a, Pointer p, Size n) |
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{ |
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return allocator_traits_detail::default_construct_range(a,p,n); |
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} |
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} // end detail |
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} // end thrust |
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