1 // nonstandard construct and destroy functions -*- C++ -*- 2 3 // Copyright (C) 2001-2013 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /* 26 * 27 * Copyright (c) 1994 28 * Hewlett-Packard Company 29 * 30 * Permission to use, copy, modify, distribute and sell this software 31 * and its documentation for any purpose is hereby granted without fee, 32 * provided that the above copyright notice appear in all copies and 33 * that both that copyright notice and this permission notice appear 34 * in supporting documentation. Hewlett-Packard Company makes no 35 * representations about the suitability of this software for any 36 * purpose. It is provided "as is" without express or implied warranty. 37 * 38 * 39 * Copyright (c) 1996,1997 40 * Silicon Graphics Computer Systems, Inc. 41 * 42 * Permission to use, copy, modify, distribute and sell this software 43 * and its documentation for any purpose is hereby granted without fee, 44 * provided that the above copyright notice appear in all copies and 45 * that both that copyright notice and this permission notice appear 46 * in supporting documentation. Silicon Graphics makes no 47 * representations about the suitability of this software for any 48 * purpose. It is provided "as is" without express or implied warranty. 49 */ 50 51 /** @file bits/stl_construct.h 52 * This is an internal header file, included by other library headers. 53 * Do not attempt to use it directly. @headername{memory} 54 */ 55 56 #ifndef _STL_CONSTRUCT_H 57 #define _STL_CONSTRUCT_H 1 58 59 #include <new> 60 #include <bits/move.h> 61 #include <ext/alloc_traits.h> 62 63 namespace std _GLIBCXX_VISIBILITY(default) 64 { 65 _GLIBCXX_BEGIN_NAMESPACE_VERSION 66 67 /** 68 * Constructs an object in existing memory by invoking an allocated 69 * object's constructor with an initializer. 70 */ 71 #if __cplusplus >= 201103L 72 template<typename _T1, typename... _Args> 73 inline void 74 _Construct(_T1* __p, _Args&&... __args) 75 { ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); } 76 #else 77 template<typename _T1, typename _T2> 78 inline void 79 _Construct(_T1* __p, const _T2& __value) 80 { 81 // _GLIBCXX_RESOLVE_LIB_DEFECTS 82 // 402. wrong new expression in [some_]allocator::construct 83 ::new(static_cast<void*>(__p)) _T1(__value); 84 } 85 #endif 86 87 /** 88 * Destroy the object pointed to by a pointer type. 89 */ 90 template<typename _Tp> 91 inline void 92 _Destroy(_Tp* __pointer) 93 { __pointer->~_Tp(); } 94 95 template<bool> 96 struct _Destroy_aux 97 { 98 template<typename _ForwardIterator> 99 static void 100 __destroy(_ForwardIterator __first, _ForwardIterator __last) 101 { 102 for (; __first != __last; ++__first) 103 std::_Destroy(std::__addressof(*__first)); 104 } 105 }; 106 107 template<> 108 struct _Destroy_aux<true> 109 { 110 template<typename _ForwardIterator> 111 static void 112 __destroy(_ForwardIterator, _ForwardIterator) { } 113 }; 114 115 /** 116 * Destroy a range of objects. If the value_type of the object has 117 * a trivial destructor, the compiler should optimize all of this 118 * away, otherwise the objects' destructors must be invoked. 119 */ 120 template<typename _ForwardIterator> 121 inline void 122 _Destroy(_ForwardIterator __first, _ForwardIterator __last) 123 { 124 typedef typename iterator_traits<_ForwardIterator>::value_type 125 _Value_type; 126 std::_Destroy_aux<__has_trivial_destructor(_Value_type)>:: 127 __destroy(__first, __last); 128 } 129 130 /** 131 * Destroy a range of objects using the supplied allocator. For 132 * nondefault allocators we do not optimize away invocation of 133 * destroy() even if _Tp has a trivial destructor. 134 */ 135 136 template<typename _ForwardIterator, typename _Allocator> 137 void 138 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 139 _Allocator& __alloc) 140 { 141 typedef __gnu_cxx::__alloc_traits<_Allocator> __traits; 142 for (; __first != __last; ++__first) 143 __traits::destroy(__alloc, std::__addressof(*__first)); 144 } 145 146 template<typename _ForwardIterator, typename _Tp> 147 inline void 148 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 149 allocator<_Tp>&) 150 { 151 _Destroy(__first, __last); 152 } 153 154 _GLIBCXX_END_NAMESPACE_VERSION 155 } // namespace std 156 157 #endif /* _STL_CONSTRUCT_H */ 158 159
