00001 // nonstandard construct and destroy functions -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2002 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 2, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // You should have received a copy of the GNU General Public License along 00017 // with this library; see the file COPYING. If not, write to the Free 00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 00019 // USA. 00020 00021 // As a special exception, you may use this file as part of a free software 00022 // library without restriction. Specifically, if other files instantiate 00023 // templates or use macros or inline functions from this file, or you compile 00024 // this file and link it with other files to produce an executable, this 00025 // file does not by itself cause the resulting executable to be covered by 00026 // the GNU General Public License. This exception does not however 00027 // invalidate any other reasons why the executable file might be covered by 00028 // the GNU General Public License. 00029 00030 /* 00031 * 00032 * Copyright (c) 1994 00033 * Hewlett-Packard Company 00034 * 00035 * Permission to use, copy, modify, distribute and sell this software 00036 * and its documentation for any purpose is hereby granted without fee, 00037 * provided that the above copyright notice appear in all copies and 00038 * that both that copyright notice and this permission notice appear 00039 * in supporting documentation. Hewlett-Packard Company makes no 00040 * representations about the suitability of this software for any 00041 * purpose. It is provided "as is" without express or implied warranty. 00042 * 00043 * 00044 * Copyright (c) 1996,1997 00045 * Silicon Graphics Computer Systems, Inc. 00046 * 00047 * Permission to use, copy, modify, distribute and sell this software 00048 * and its documentation for any purpose is hereby granted without fee, 00049 * provided that the above copyright notice appear in all copies and 00050 * that both that copyright notice and this permission notice appear 00051 * in supporting documentation. Silicon Graphics makes no 00052 * representations about the suitability of this software for any 00053 * purpose. It is provided "as is" without express or implied warranty. 00054 */ 00055 00056 /** @file stl_construct.h 00057 * This is an internal header file, included by other library headers. 00058 * You should not attempt to use it directly. 00059 */ 00060 00061 #ifndef _CPP_BITS_STL_CONSTRUCT_H 00062 #define _CPP_BITS_STL_CONSTRUCT_H 1 00063 00064 #include <bits/type_traits.h> 00065 #include <new> 00066 00067 namespace std 00068 { 00069 /** 00070 * @if maint 00071 * Constructs an object in existing memory by invoking an allocated 00072 * object's constructor with an initializer. 00073 * @endif 00074 */ 00075 template <class _T1, class _T2> 00076 inline void 00077 _Construct(_T1* __p, const _T2& __value) 00078 { new (static_cast<void*>(__p)) _T1(__value); } 00079 00080 /** 00081 * @if maint 00082 * Constructs an object in existing memory by invoking an allocated 00083 * object's default constructor (no initializers). 00084 * @endif 00085 */ 00086 template <class _T1> 00087 inline void 00088 _Construct(_T1* __p) 00089 { new (static_cast<void*>(__p)) _T1(); } 00090 00091 /** 00092 * @if maint 00093 * Destroy a range of objects with nontrivial destructors. 00094 * 00095 * This is a helper function used only by _Destroy(). 00096 * @endif 00097 */ 00098 template <class _ForwardIterator> 00099 inline void 00100 __destroy_aux(_ForwardIterator __first, _ForwardIterator __last, __false_type) 00101 { for ( ; __first != __last; ++__first) _Destroy(&*__first); } 00102 00103 /** 00104 * @if maint 00105 * Destroy a range of objects with trivial destructors. Since the destructors 00106 * are trivial, there's nothing to do and hopefully this function will be 00107 * entirely optimized away. 00108 * 00109 * This is a helper function used only by _Destroy(). 00110 * @endif 00111 */ 00112 template <class _ForwardIterator> 00113 inline void 00114 __destroy_aux(_ForwardIterator, _ForwardIterator, __true_type) 00115 { } 00116 00117 /** 00118 * @if maint 00119 * Destroy the object pointed to by a pointer type. 00120 * @endif 00121 */ 00122 template <class _Tp> 00123 inline void 00124 _Destroy(_Tp* __pointer) 00125 { __pointer->~_Tp(); } 00126 00127 /** 00128 * @if maint 00129 * Destroy a range of objects. If the value_type of the object has 00130 * a trivial destructor, the compiler should optimize all of this 00131 * away, otherwise the objects' destructors must be invoked. 00132 * @endif 00133 */ 00134 template <class _ForwardIterator> 00135 inline void 00136 _Destroy(_ForwardIterator __first, _ForwardIterator __last) 00137 { 00138 typedef typename iterator_traits<_ForwardIterator>::value_type 00139 _Value_type; 00140 typedef typename __type_traits<_Value_type>::has_trivial_destructor 00141 _Has_trivial_destructor; 00142 00143 __destroy_aux(__first, __last, _Has_trivial_destructor()); 00144 } 00145 } // namespace std 00146 00147 #endif /* _CPP_BITS_STL_CONSTRUCT_H */ 00148