1// nonstandard construct and destroy functions -*- C++ -*- 2 3// Copyright (C) 2001, 2002, 2003, 2004, 2005 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 2, 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// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30/* 31 * 32 * Copyright (c) 1994 33 * Hewlett-Packard Company 34 * 35 * Permission to use, copy, modify, distribute and sell this software 36 * and its documentation for any purpose is hereby granted without fee, 37 * provided that the above copyright notice appear in all copies and 38 * that both that copyright notice and this permission notice appear 39 * in supporting documentation. Hewlett-Packard Company makes no 40 * representations about the suitability of this software for any 41 * purpose. It is provided "as is" without express or implied warranty. 42 * 43 * 44 * Copyright (c) 1996,1997 45 * Silicon Graphics Computer Systems, Inc. 46 * 47 * Permission to use, copy, modify, distribute and sell this software 48 * and its documentation for any purpose is hereby granted without fee, 49 * provided that the above copyright notice appear in all copies and 50 * that both that copyright notice and this permission notice appear 51 * in supporting documentation. Silicon Graphics makes no 52 * representations about the suitability of this software for any 53 * purpose. It is provided "as is" without express or implied warranty. 54 */ 55 56/** @file stl_construct.h 57 * This is an internal header file, included by other library headers. 58 * You should not attempt to use it directly. 59 */ 60 61#ifndef _STL_CONSTRUCT_H 62#define _STL_CONSTRUCT_H 1 63 64#include <bits/cpp_type_traits.h> 65#include <new> 66 67_GLIBCXX_BEGIN_NAMESPACE(std) 68 69 /** 70 * @if maint 71 * Constructs an object in existing memory by invoking an allocated 72 * object's constructor with an initializer. 73 * @endif 74 */ 75 template<typename _T1, typename _T2> 76 inline void 77 _Construct(_T1* __p, const _T2& __value) 78 { 79 // _GLIBCXX_RESOLVE_LIB_DEFECTS 80 // 402. wrong new expression in [some_]allocator::construct 81 ::new(static_cast<void*>(__p)) _T1(__value); 82 } 83 84 /** 85 * @if maint 86 * Constructs an object in existing memory by invoking an allocated 87 * object's default constructor (no initializers). 88 * @endif 89 */ 90 template<typename _T1> 91 inline void 92 _Construct(_T1* __p) 93 { 94 // _GLIBCXX_RESOLVE_LIB_DEFECTS 95 // 402. wrong new expression in [some_]allocator::construct 96 ::new(static_cast<void*>(__p)) _T1(); 97 } 98 99 /** 100 * @if maint 101 * Destroy the object pointed to by a pointer type. 102 * @endif 103 */ 104 template<typename _Tp> 105 inline void 106 _Destroy(_Tp* __pointer) 107 { __pointer->~_Tp(); } 108 109 /** 110 * @if maint 111 * Destroy a range of objects with nontrivial destructors. 112 * 113 * This is a helper function used only by _Destroy(). 114 * @endif 115 */ 116 template<typename _ForwardIterator> 117 inline void 118 __destroy_aux(_ForwardIterator __first, _ForwardIterator __last, 119 __false_type) 120 { 121 for (; __first != __last; ++__first) 122 std::_Destroy(&*__first); 123 } 124 125 /** 126 * @if maint 127 * Destroy a range of objects with trivial destructors. Since the destructors 128 * are trivial, there's nothing to do and hopefully this function will be 129 * entirely optimized away. 130 * 131 * This is a helper function used only by _Destroy(). 132 * @endif 133 */ 134 template<typename _ForwardIterator> 135 inline void 136 __destroy_aux(_ForwardIterator, _ForwardIterator, __true_type) 137 { } 138 139 /** 140 * @if maint 141 * Destroy a range of objects. If the value_type of the object has 142 * a trivial destructor, the compiler should optimize all of this 143 * away, otherwise the objects' destructors must be invoked. 144 * @endif 145 */ 146 template<typename _ForwardIterator> 147 inline void 148 _Destroy(_ForwardIterator __first, _ForwardIterator __last) 149 { 150 typedef typename iterator_traits<_ForwardIterator>::value_type 151 _Value_type; 152 typedef typename std::__is_scalar<_Value_type>::__type 153 _Has_trivial_destructor; 154 155 std::__destroy_aux(__first, __last, _Has_trivial_destructor()); 156 } 157 158 /** 159 * @if maint 160 * Destroy a range of objects using the supplied allocator. For 161 * nondefault allocators we do not optimize away invocation of 162 * destroy() even if _Tp has a trivial destructor. 163 * @endif 164 */ 165 166 template <typename _Tp> class allocator; 167 168 template<typename _ForwardIterator, typename _Allocator> 169 void 170 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 171 _Allocator __alloc) 172 { 173 for (; __first != __last; ++__first) 174 __alloc.destroy(&*__first); 175 } 176 177 template<typename _ForwardIterator, typename _Tp> 178 inline void 179 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 180 allocator<_Tp>) 181 { 182 _Destroy(__first, __last); 183 } 184 185_GLIBCXX_END_NAMESPACE 186 187#endif /* _STL_CONSTRUCT_H */ 188 189