projects / ceph.git / blame
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| b32b8144 FG |
1 | /* Copyright 2016-2017 Joaquin M Lopez Munoz. |
| 2 | * Distributed under the Boost Software License, Version 1.0. | |
| 3 | * (See accompanying file LICENSE_1_0.txt or copy at | |
| 4 | * http://www.boost.org/LICENSE_1_0.txt) | |
| 5 | * | |
| 6 | * See http://www.boost.org/libs/poly_collection for library home page. | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef BOOST_POLY_COLLECTION_DETAIL_NEWDELETE_ALLOCATOR_HPP | |
| 10 | #define BOOST_POLY_COLLECTION_DETAIL_NEWDELETE_ALLOCATOR_HPP | |
| 11 | ||
| 12 | #if defined(_MSC_VER) | |
| 13 | #pragma once | |
| 14 | #endif | |
| 15 | ||
| 16 | #include <boost/poly_collection/detail/is_constructible.hpp> | |
| 17 | #include <memory> | |
| 18 | #include <new> | |
| 19 | #include <utility> | |
| 20 | ||
| 21 | namespace boost{ | |
| 22 | ||
| 23 | namespace poly_collection{ | |
| 24 | ||
| 25 | namespace detail{ | |
| 26 | ||
| 27 | /* In order to comply with [container.requirements.general]/3, | |
| 28 | * newdelete_allocator_adaptor<Allocator> overrides | |
| 29 | * Allocator::construct/destroy with vanilla new/delete implementations. | |
| 30 | * Used therefore in all auxiliary internal structures. | |
| 31 | */ | |
| 32 | ||
| 33 | template<typename Allocator> | |
| 34 | struct newdelete_allocator_adaptor:Allocator | |
| 35 | { | |
| 36 | using traits=std::allocator_traits<Allocator>; | |
| 37 | ||
| 38 | using value_type=typename traits::value_type; | |
| 39 | using size_type=typename traits::size_type; | |
| 40 | using difference_type=typename traits::difference_type; | |
| 41 | using pointer=typename traits::pointer; | |
| 42 | using const_pointer=typename traits::const_pointer; | |
| 43 | using void_pointer=typename traits::void_pointer; | |
| 44 | using const_void_pointer=typename traits::const_void_pointer; | |
| 45 | using propagate_on_container_copy_assignment= | |
| 46 | typename traits::propagate_on_container_copy_assignment; | |
| 47 | using propagate_on_container_move_assignment= | |
| 48 | typename traits::propagate_on_container_move_assignment; | |
| 49 | using propagate_on_container_swap= | |
| 50 | typename traits::propagate_on_container_swap; | |
| 51 | ||
| 52 | template<typename U> | |
| 53 | struct rebind | |
| 54 | { | |
| 55 | using other=newdelete_allocator_adaptor< | |
| 56 | typename traits::template rebind_alloc<U>>; | |
| 57 | }; | |
| 58 | ||
| 59 | newdelete_allocator_adaptor()=default; | |
| 60 | newdelete_allocator_adaptor(const newdelete_allocator_adaptor&)=default; | |
| 61 | ||
| 62 | template< | |
| 63 | typename Allocator2, | |
| 64 | typename std::enable_if< | |
| 65 | is_constructible<Allocator,Allocator2>::value | |
| 66 | >::type* =nullptr | |
| 67 | > | |
| 68 | newdelete_allocator_adaptor(const Allocator2& x)noexcept:Allocator{x}{} | |
| 69 | ||
| 70 | template< | |
| 71 | typename Allocator2, | |
| 72 | typename std::enable_if< | |
| 73 | is_constructible<Allocator,Allocator2>::value | |
| 74 | >::type* =nullptr | |
| 75 | > | |
| 76 | newdelete_allocator_adaptor( | |
| 77 | const newdelete_allocator_adaptor<Allocator2>& x)noexcept: | |
| 78 | Allocator{static_cast<const Allocator2&>(x)}{} | |
| 79 | ||
| 80 | newdelete_allocator_adaptor& operator=( | |
| 81 | const newdelete_allocator_adaptor&)=default; | |
| 82 | ||
| 83 | template<typename T,typename... Args> | |
| 84 | void construct(T* p,Args&&... args) | |
| 85 | { | |
| 86 | ::new ((void*)p) T(std::forward<Args>(args)...); | |
| 87 | } | |
| 88 | ||
| 89 | template<typename T> | |
| 90 | void destroy(T* p) | |
| 91 | { | |
| 92 | p->~T(); | |
| 93 | } | |
| 94 | }; | |
| 95 | ||
| 96 | } /* namespace poly_collection::detail */ | |
| 97 | ||
| 98 | } /* namespace poly_collection */ | |
| 99 | ||
| 100 | } /* namespace boost */ | |
| 101 | ||
| 102 | #endif |