00001 // nonstandard construct and destroy functions -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2002, 2003, 2004, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 _STL_CONSTRUCT_H 00062 #define _STL_CONSTRUCT_H 1 00063 00064 #include <bits/cpp_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<typename _T1, typename _T2> 00076 inline void 00077 _Construct(_T1* __p, const _T2& __value) 00078 { 00079 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00080 // 402. wrong new expression in [some_]allocator::construct 00081 ::new(static_cast<void*>(__p)) _T1(__value); 00082 } 00083 00084 /** 00085 * @if maint 00086 * Constructs an object in existing memory by invoking an allocated 00087 * object's default constructor (no initializers). 00088 * @endif 00089 */ 00090 template<typename _T1> 00091 inline void 00092 _Construct(_T1* __p) 00093 { 00094 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00095 // 402. wrong new expression in [some_]allocator::construct 00096 ::new(static_cast<void*>(__p)) _T1(); 00097 } 00098 00099 /** 00100 * @if maint 00101 * Destroy the object pointed to by a pointer type. 00102 * @endif 00103 */ 00104 template<typename _Tp> 00105 inline void 00106 _Destroy(_Tp* __pointer) 00107 { __pointer->~_Tp(); } 00108 00109 /** 00110 * @if maint 00111 * Destroy a range of objects with nontrivial destructors. 00112 * 00113 * This is a helper function used only by _Destroy(). 00114 * @endif 00115 */ 00116 template<typename _ForwardIterator> 00117 inline void 00118 __destroy_aux(_ForwardIterator __first, _ForwardIterator __last, 00119 __false_type) 00120 { 00121 for (; __first != __last; ++__first) 00122 std::_Destroy(&*__first); 00123 } 00124 00125 /** 00126 * @if maint 00127 * Destroy a range of objects with trivial destructors. Since the destructors 00128 * are trivial, there's nothing to do and hopefully this function will be 00129 * entirely optimized away. 00130 * 00131 * This is a helper function used only by _Destroy(). 00132 * @endif 00133 */ 00134 template<typename _ForwardIterator> 00135 inline void 00136 __destroy_aux(_ForwardIterator, _ForwardIterator, __true_type) 00137 { } 00138 00139 /** 00140 * @if maint 00141 * Destroy a range of objects. If the value_type of the object has 00142 * a trivial destructor, the compiler should optimize all of this 00143 * away, otherwise the objects' destructors must be invoked. 00144 * @endif 00145 */ 00146 template<typename _ForwardIterator> 00147 inline void 00148 _Destroy(_ForwardIterator __first, _ForwardIterator __last) 00149 { 00150 typedef typename iterator_traits<_ForwardIterator>::value_type 00151 _Value_type; 00152 typedef typename std::__is_scalar<_Value_type>::__type 00153 _Has_trivial_destructor; 00154 00155 std::__destroy_aux(__first, __last, _Has_trivial_destructor()); 00156 } 00157 00158 /** 00159 * @if maint 00160 * Destroy a range of objects using the supplied allocator. For 00161 * nondefault allocators we do not optimize away invocation of 00162 * destroy() even if _Tp has a trivial destructor. 00163 * @endif 00164 */ 00165 00166 template <typename _Tp> class allocator; 00167 00168 template<typename _ForwardIterator, typename _Allocator> 00169 void 00170 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 00171 _Allocator __alloc) 00172 { 00173 for (; __first != __last; ++__first) 00174 __alloc.destroy(&*__first); 00175 } 00176 00177 template<typename _ForwardIterator, typename _Tp> 00178 inline void 00179 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 00180 allocator<_Tp>) 00181 { 00182 _Destroy(__first, __last); 00183 } 00184 00185 00186 } // namespace std 00187 00188 #endif /* _STL_CONSTRUCT_H */ 00189