00001 // nonstandard construct and destroy functions -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 00004 // 2009, 2010 00005 // Free Software Foundation, Inc. 00006 // 00007 // This file is part of the GNU ISO C++ Library. This library is free 00008 // software; you can redistribute it and/or modify it under the 00009 // terms of the GNU General Public License as published by the 00010 // Free Software Foundation; either version 3, or (at your option) 00011 // any later version. 00012 00013 // This library is distributed in the hope that it will be useful, 00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00016 // GNU General Public License for more details. 00017 00018 // Under Section 7 of GPL version 3, you are granted additional 00019 // permissions described in the GCC Runtime Library Exception, version 00020 // 3.1, as published by the Free Software Foundation. 00021 00022 // You should have received a copy of the GNU General Public License and 00023 // a copy of the GCC Runtime Library Exception along with this program; 00024 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00025 // <http://www.gnu.org/licenses/>. 00026 00027 /* 00028 * 00029 * Copyright (c) 1994 00030 * Hewlett-Packard Company 00031 * 00032 * Permission to use, copy, modify, distribute and sell this software 00033 * and its documentation for any purpose is hereby granted without fee, 00034 * provided that the above copyright notice appear in all copies and 00035 * that both that copyright notice and this permission notice appear 00036 * in supporting documentation. Hewlett-Packard Company makes no 00037 * representations about the suitability of this software for any 00038 * purpose. It is provided "as is" without express or implied warranty. 00039 * 00040 * 00041 * Copyright (c) 1996,1997 00042 * Silicon Graphics Computer Systems, Inc. 00043 * 00044 * Permission to use, copy, modify, distribute and sell this software 00045 * and its documentation for any purpose is hereby granted without fee, 00046 * provided that the above copyright notice appear in all copies and 00047 * that both that copyright notice and this permission notice appear 00048 * in supporting documentation. Silicon Graphics makes no 00049 * representations about the suitability of this software for any 00050 * purpose. It is provided "as is" without express or implied warranty. 00051 */ 00052 00053 /** @file stl_construct.h 00054 * This is an internal header file, included by other library headers. 00055 * You should not attempt to use it directly. 00056 */ 00057 00058 #ifndef _STL_CONSTRUCT_H 00059 #define _STL_CONSTRUCT_H 1 00060 00061 #include <new> 00062 #include <bits/move.h> 00063 00064 _GLIBCXX_BEGIN_NAMESPACE(std) 00065 00066 /** 00067 * Constructs an object in existing memory by invoking an allocated 00068 * object's constructor with an initializer. 00069 */ 00070 #ifdef __GXX_EXPERIMENTAL_CXX0X__ 00071 template<typename _T1, typename... _Args> 00072 inline void 00073 _Construct(_T1* __p, _Args&&... __args) 00074 { ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); } 00075 #else 00076 template<typename _T1, typename _T2> 00077 inline void 00078 _Construct(_T1* __p, const _T2& __value) 00079 { 00080 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00081 // 402. wrong new expression in [some_]allocator::construct 00082 ::new(static_cast<void*>(__p)) _T1(__value); 00083 } 00084 #endif 00085 00086 /** 00087 * Destroy the object pointed to by a pointer type. 00088 */ 00089 template<typename _Tp> 00090 inline void 00091 _Destroy(_Tp* __pointer) 00092 { __pointer->~_Tp(); } 00093 00094 template<bool> 00095 struct _Destroy_aux 00096 { 00097 template<typename _ForwardIterator> 00098 static void 00099 __destroy(_ForwardIterator __first, _ForwardIterator __last) 00100 { 00101 for (; __first != __last; ++__first) 00102 std::_Destroy(std::__addressof(*__first)); 00103 } 00104 }; 00105 00106 template<> 00107 struct _Destroy_aux<true> 00108 { 00109 template<typename _ForwardIterator> 00110 static void 00111 __destroy(_ForwardIterator, _ForwardIterator) { } 00112 }; 00113 00114 /** 00115 * Destroy a range of objects. If the value_type of the object has 00116 * a trivial destructor, the compiler should optimize all of this 00117 * away, otherwise the objects' destructors must be invoked. 00118 */ 00119 template<typename _ForwardIterator> 00120 inline void 00121 _Destroy(_ForwardIterator __first, _ForwardIterator __last) 00122 { 00123 typedef typename iterator_traits<_ForwardIterator>::value_type 00124 _Value_type; 00125 std::_Destroy_aux<__has_trivial_destructor(_Value_type)>:: 00126 __destroy(__first, __last); 00127 } 00128 00129 /** 00130 * Destroy a range of objects using the supplied allocator. For 00131 * nondefault allocators we do not optimize away invocation of 00132 * destroy() even if _Tp has a trivial destructor. 00133 */ 00134 00135 template <typename _Tp> class allocator; 00136 00137 template<typename _ForwardIterator, typename _Allocator> 00138 void 00139 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 00140 _Allocator& __alloc) 00141 { 00142 for (; __first != __last; ++__first) 00143 __alloc.destroy(std::__addressof(*__first)); 00144 } 00145 00146 template<typename _ForwardIterator, typename _Tp> 00147 inline void 00148 _Destroy(_ForwardIterator __first, _ForwardIterator __last, 00149 allocator<_Tp>&) 00150 { 00151 _Destroy(__first, __last); 00152 } 00153 00154 _GLIBCXX_END_NAMESPACE 00155 00156 #endif /* _STL_CONSTRUCT_H */ 00157