1 // nonstandard construct and destroy functions -*- C++ -*- 2 3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 4 // 2009, 2010 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 64 namespace std _GLIBCXX_VISIBILITY(default) 65 { 66 _GLIBCXX_BEGIN_NAMESPACE_VERSION 67 68 /** 69 * Constructs an object in existing memory by invoking an allocated 70 * object's constructor with an initializer. 71 */ 72 #ifdef __GXX_EXPERIMENTAL_CXX0X__ 73 template<typename _T1, typename... _Args> 74 inline void 75 _Construct(_T1* __p, _Args&&... __args) 76 { ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); } 77 #else 78 template<typename _T1, typename _T2> 79 inline void 80 _Construct(_T1* __p, const _T2& __value) 81 { 82 // _GLIBCXX_RESOLVE_LIB_DEFECTS 83 // 402. wrong new expression in [some_]allocator::construct 84 ::new(static_cast<void*>(__p)) _T1(__value); 85 } 86 #endif 87 88 /** 89 * Destroy the object pointed to by a pointer type. 90 */ 91 template<typename _Tp> 92 inline void 93 _Destroy(_Tp* __pointer) 94 { __pointer->~_Tp(); } 95 96 template<bool> 97 struct _Destroy_aux 98 { 99 template<typename _ForwardIterator> 100 static void 101 __destroy(_ForwardIterator __first, _ForwardIterator __last) 102 { 103 for (; __first != __last; ++__first) 104 std::_Destroy(std::__addressof(*__first)); 105 } 106 }; 107 108 template<> 109 struct _Destroy_aux<true> 110 { 111 template<typename _ForwardIterator> 112 static void 113 __destroy(_ForwardIterator, _ForwardIterator) { } 114 }; 115 116 /** 117 * Destroy a range of objects. If the value_type of the object has 118 * a trivial destructor, the compiler should optimize all of this 119 * away, otherwise the objects' destructors must be invoked. 120 */ 121 template<typename _ForwardIterator> 122 inline void 123 _Destroy(_ForwardIterator __first, _ForwardIterator __last) 124 { 125 typedef typename iterator_traits<_ForwardIterator>::value_type 126 _Value_type; 127 std::_Destroy_aux<__has_trivial_destructor(_Value_type)>:: 128 __destroy(__first, __last); 129 } 130 131 /** 132 * Destroy a range of objects using the supplied allocator. For 133 * nondefault allocators we do not optimize away invocation of 134 * destroy() even if _Tp has a trivial destructor. 135 */ 136 137 template <typename _Tp> class allocator; 138 139 template<typename _ForwardIterator, typename _Allocator> 140 void 141 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 142 _Allocator& __alloc) 143 { 144 for (; __first != __last; ++__first) 145 __alloc.destroy(std::__addressof(*__first)); 146 } 147 148 template<typename _ForwardIterator, typename _Tp> 149 inline void 150 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 151 allocator<_Tp>&) 152 { 153 _Destroy(__first, __last); 154 } 155 156 _GLIBCXX_END_NAMESPACE_VERSION 157 } // namespace 158 159 #endif /* _STL_CONSTRUCT_H */ 160 161
