1 // nonstandard construct and destroy functions -*- C++ -*- 2 3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 4 // 2009, 2010, 2011 5 // Free Software Foundation, Inc. 6 // 7 // This file is part of the GNU ISO C++ Library. This library is free 8 // software; you can redistribute it and/or modify it under the 9 // terms of the GNU General Public License as published by the 10 // Free Software Foundation; either version 3, or (at your option) 11 // any later version. 12 13 // This library is distributed in the hope that it will be useful, 14 // but WITHOUT ANY WARRANTY; without even the implied warranty of 15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 // GNU General Public License for more details. 17 18 // Under Section 7 of GPL version 3, you are granted additional 19 // permissions described in the GCC Runtime Library Exception, version 20 // 3.1, as published by the Free Software Foundation. 21 22 // You should have received a copy of the GNU General Public License and 23 // a copy of the GCC Runtime Library Exception along with this program; 24 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 25 // <http://www.gnu.org/licenses/>. 26 27 /* 28 * 29 * Copyright (c) 1994 30 * Hewlett-Packard Company 31 * 32 * Permission to use, copy, modify, distribute and sell this software 33 * and its documentation for any purpose is hereby granted without fee, 34 * provided that the above copyright notice appear in all copies and 35 * that both that copyright notice and this permission notice appear 36 * in supporting documentation. Hewlett-Packard Company makes no 37 * representations about the suitability of this software for any 38 * purpose. It is provided "as is" without express or implied warranty. 39 * 40 * 41 * Copyright (c) 1996,1997 42 * Silicon Graphics Computer Systems, Inc. 43 * 44 * Permission to use, copy, modify, distribute and sell this software 45 * and its documentation for any purpose is hereby granted without fee, 46 * provided that the above copyright notice appear in all copies and 47 * that both that copyright notice and this permission notice appear 48 * in supporting documentation. Silicon Graphics makes no 49 * representations about the suitability of this software for any 50 * purpose. It is provided "as is" without express or implied warranty. 51 */ 52 53 /** @file bits/stl_construct.h 54 * This is an internal header file, included by other library headers. 55 * Do not attempt to use it directly. @headername{memory} 56 */ 57 58 #ifndef _STL_CONSTRUCT_H 59 #define _STL_CONSTRUCT_H 1 60 61 #include <new> 62 #include <bits/move.h> 63 #include <ext/alloc_traits.h> 64 65 namespace std _GLIBCXX_VISIBILITY(default) 66 { 67 _GLIBCXX_BEGIN_NAMESPACE_VERSION 68 69 /** 70 * Constructs an object in existing memory by invoking an allocated 71 * object's constructor with an initializer. 72 */ 73 #ifdef __GXX_EXPERIMENTAL_CXX0X__ 74 template<typename _T1, typename... _Args> 75 inline void 76 _Construct(_T1* __p, _Args&&... __args) 77 { ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); } 78 #else 79 template<typename _T1, typename _T2> 80 inline void 81 _Construct(_T1* __p, const _T2& __value) 82 { 83 // _GLIBCXX_RESOLVE_LIB_DEFECTS 84 // 402. wrong new expression in [some_]allocator::construct 85 ::new(static_cast<void*>(__p)) _T1(__value); 86 } 87 #endif 88 89 /** 90 * Destroy the object pointed to by a pointer type. 91 */ 92 template<typename _Tp> 93 inline void 94 _Destroy(_Tp* __pointer) 95 { __pointer->~_Tp(); } 96 97 template<bool> 98 struct _Destroy_aux 99 { 100 template<typename _ForwardIterator> 101 static void 102 __destroy(_ForwardIterator __first, _ForwardIterator __last) 103 { 104 for (; __first != __last; ++__first) 105 std::_Destroy(std::__addressof(*__first)); 106 } 107 }; 108 109 template<> 110 struct _Destroy_aux<true> 111 { 112 template<typename _ForwardIterator> 113 static void 114 __destroy(_ForwardIterator, _ForwardIterator) { } 115 }; 116 117 /** 118 * Destroy a range of objects. If the value_type of the object has 119 * a trivial destructor, the compiler should optimize all of this 120 * away, otherwise the objects' destructors must be invoked. 121 */ 122 template<typename _ForwardIterator> 123 inline void 124 _Destroy(_ForwardIterator __first, _ForwardIterator __last) 125 { 126 typedef typename iterator_traits<_ForwardIterator>::value_type 127 _Value_type; 128 std::_Destroy_aux<__has_trivial_destructor(_Value_type)>:: 129 __destroy(__first, __last); 130 } 131 132 /** 133 * Destroy a range of objects using the supplied allocator. For 134 * nondefault allocators we do not optimize away invocation of 135 * destroy() even if _Tp has a trivial destructor. 136 */ 137 138 template <typename _Tp> class allocator; 139 140 template<typename _ForwardIterator, typename _Allocator> 141 void 142 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 143 _Allocator& __alloc) 144 { 145 typedef __gnu_cxx::__alloc_traits<_Allocator> __traits; 146 for (; __first != __last; ++__first) 147 __traits::destroy(__alloc, std::__addressof(*__first)); 148 } 149 150 template<typename _ForwardIterator, typename _Tp> 151 inline void 152 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 153 allocator<_Tp>&) 154 { 155 _Destroy(__first, __last); 156 } 157 158 _GLIBCXX_END_NAMESPACE_VERSION 159 } // namespace 160 161 #endif /* _STL_CONSTRUCT_H */ 162 163
