1 // nonstandard construct and destroy functions -*- C++ -*- 2 3 // Copyright (C) 2001, 2002 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 _CPP_BITS_STL_CONSTRUCT_H 62 #define _CPP_BITS_STL_CONSTRUCT_H 1 63 64 #include <bits/type_traits.h> 65 #include <new> 66 67 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 <class _T1, class _T2> 76 inline void 77 _Construct(_T1* __p, const _T2& __value) 78 { new (static_cast<void*>(__p)) _T1(__value); } 79 80 /** 81 * @if maint 82 * Constructs an object in existing memory by invoking an allocated 83 * object's default constructor (no initializers). 84 * @endif 85 */ 86 template <class _T1> 87 inline void 88 _Construct(_T1* __p) 89 { new (static_cast<void*>(__p)) _T1(); } 90 91 /** 92 * @if maint 93 * Destroy a range of objects with nontrivial destructors. 94 * 95 * This is a helper function used only by _Destroy(). 96 * @endif 97 */ 98 template <class _ForwardIterator> 99 inline void 100 __destroy_aux(_ForwardIterator __first, _ForwardIterator __last, __false_type) 101 { for ( ; __first != __last; ++__first) _Destroy(&*__first); } 102 103 /** 104 * @if maint 105 * Destroy a range of objects with trivial destructors. Since the destructors 106 * are trivial, there's nothing to do and hopefully this function will be 107 * entirely optimized away. 108 * 109 * This is a helper function used only by _Destroy(). 110 * @endif 111 */ 112 template <class _ForwardIterator> 113 inline void 114 __destroy_aux(_ForwardIterator, _ForwardIterator, __true_type) 115 { } 116 117 /** 118 * @if maint 119 * Destroy the object pointed to by a pointer type. 120 * @endif 121 */ 122 template <class _Tp> 123 inline void 124 _Destroy(_Tp* __pointer) 125 { __pointer->~_Tp(); } 126 127 /** 128 * @if maint 129 * Destroy a range of objects. If the value_type of the object has 130 * a trivial destructor, the compiler should optimize all of this 131 * away, otherwise the objects' destructors must be invoked. 132 * @endif 133 */ 134 template <class _ForwardIterator> 135 inline void 136 _Destroy(_ForwardIterator __first, _ForwardIterator __last) 137 { 138 typedef typename iterator_traits<_ForwardIterator>::value_type 139 _Value_type; 140 typedef typename __type_traits<_Value_type>::has_trivial_destructor 141 _Has_trivial_destructor; 142 143 __destroy_aux(__first, __last, _Has_trivial_destructor()); 144 } 145 } // namespace std 146 147 #endif /* _CPP_BITS_STL_CONSTRUCT_H */ 148 149