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110 lines
2.9 KiB
110 lines
2.9 KiB
11 years ago
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/*
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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/type_traits.h>
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#include <thrust/detail/allocator/allocator_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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#include <memory>
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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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// fill_construct_range has 2 cases:
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// if Allocator has an effectful member function construct:
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// 1. construct via the allocator
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// else
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// 2. construct via uninitialized_fill
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template<typename Allocator, typename T, typename Arg1>
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struct has_effectful_member_construct2
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: has_member_construct2<Allocator,T,Arg1>
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{};
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// std::allocator::construct's only effect is to invoke placement new
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template<typename U, typename T, typename Arg1>
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struct has_effectful_member_construct2<std::allocator<U>,T,Arg1>
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: thrust::detail::false_type
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{};
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template<typename Allocator, typename Arg1>
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struct construct2_via_allocator
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{
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Allocator &a;
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Arg1 arg;
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construct2_via_allocator(Allocator &a, const Arg1 &arg)
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: a(a), arg(arg)
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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, arg);
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}
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};
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template<typename Allocator, typename Pointer, typename Size, typename T>
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typename enable_if<
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has_effectful_member_construct2<
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Allocator,
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typename pointer_element<Pointer>::type,
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T
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>::value
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>::type
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fill_construct_range(Allocator &a, Pointer p, Size n, const T &value)
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{
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thrust::for_each_n(allocator_system<Allocator>::get(a), p, n, construct2_via_allocator<Allocator,T>(a, value));
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}
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template<typename Allocator, typename Pointer, typename Size, typename T>
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typename disable_if<
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has_effectful_member_construct2<
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Allocator,
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typename pointer_element<Pointer>::type,
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T
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>::value
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>::type
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fill_construct_range(Allocator &a, Pointer p, Size n, const T &value)
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{
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thrust::uninitialized_fill_n(allocator_system<Allocator>::get(a), p, n, value);
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}
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} // end allocator_traits_detail
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template<typename Alloc, typename Pointer, typename Size, typename T>
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void fill_construct_range(Alloc &a, Pointer p, Size n, const T &value)
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{
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return allocator_traits_detail::fill_construct_range(a,p,n,value);
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}
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} // end detail
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} // end thrust
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