libstdc++
stl_construct.h
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1 // nonstandard construct and destroy functions -*- C++ -*-
2 
3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 // Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11 
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
20 
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
25 
26 /*
27  *
28  * Copyright (c) 1994
29  * Hewlett-Packard Company
30  *
31  * Permission to use, copy, modify, distribute and sell this software
32  * and its documentation for any purpose is hereby granted without fee,
33  * provided that the above copyright notice appear in all copies and
34  * that both that copyright notice and this permission notice appear
35  * in supporting documentation. Hewlett-Packard Company makes no
36  * representations about the suitability of this software for any
37  * purpose. It is provided "as is" without express or implied warranty.
38  *
39  *
40  * Copyright (c) 1996,1997
41  * Silicon Graphics Computer Systems, Inc.
42  *
43  * Permission to use, copy, modify, distribute and sell this software
44  * and its documentation for any purpose is hereby granted without fee,
45  * provided that the above copyright notice appear in all copies and
46  * that both that copyright notice and this permission notice appear
47  * in supporting documentation. Silicon Graphics makes no
48  * representations about the suitability of this software for any
49  * purpose. It is provided "as is" without express or implied warranty.
50  */
51 
52 /** @file stl_construct.h
53  * This is an internal header file, included by other library headers.
54  * You should not attempt to use it directly.
55  */
56 
57 #ifndef _STL_CONSTRUCT_H
58 #define _STL_CONSTRUCT_H 1
59 
60 #include <new>
61 
62 _GLIBCXX_BEGIN_NAMESPACE(std)
63 
64  /**
65  * Constructs an object in existing memory by invoking an allocated
66  * object's constructor with an initializer.
67  */
68  template<typename _T1, typename _T2>
69  inline void
70  _Construct(_T1* __p, const _T2& __value)
71  {
72  // _GLIBCXX_RESOLVE_LIB_DEFECTS
73  // 402. wrong new expression in [some_]allocator::construct
74  ::new(static_cast<void*>(__p)) _T1(__value);
75  }
76 
77  /**
78  * Destroy the object pointed to by a pointer type.
79  */
80  template<typename _Tp>
81  inline void
82  _Destroy(_Tp* __pointer)
83  { __pointer->~_Tp(); }
84 
85  template<bool>
86  struct _Destroy_aux
87  {
88  template<typename _ForwardIterator>
89  static void
90  __destroy(_ForwardIterator __first, _ForwardIterator __last)
91  {
92  for (; __first != __last; ++__first)
93  std::_Destroy(&*__first);
94  }
95  };
96 
97  template<>
98  struct _Destroy_aux<true>
99  {
100  template<typename _ForwardIterator>
101  static void
102  __destroy(_ForwardIterator, _ForwardIterator) { }
103  };
104 
105  /**
106  * Destroy a range of objects. If the value_type of the object has
107  * a trivial destructor, the compiler should optimize all of this
108  * away, otherwise the objects' destructors must be invoked.
109  */
110  template<typename _ForwardIterator>
111  inline void
112  _Destroy(_ForwardIterator __first, _ForwardIterator __last)
113  {
114  typedef typename iterator_traits<_ForwardIterator>::value_type
115  _Value_type;
116  std::_Destroy_aux<__has_trivial_destructor(_Value_type)>::
117  __destroy(__first, __last);
118  }
119 
120  /**
121  * Destroy a range of objects using the supplied allocator. For
122  * nondefault allocators we do not optimize away invocation of
123  * destroy() even if _Tp has a trivial destructor.
124  */
125 
126  template <typename _Tp> class allocator;
127 
128  template<typename _ForwardIterator, typename _Allocator>
129  void
130  _Destroy(_ForwardIterator __first, _ForwardIterator __last,
131  _Allocator& __alloc)
132  {
133  for (; __first != __last; ++__first)
134  __alloc.destroy(&*__first);
135  }
136 
137  template<typename _ForwardIterator, typename _Tp>
138  inline void
139  _Destroy(_ForwardIterator __first, _ForwardIterator __last,
140  allocator<_Tp>&)
141  {
142  _Destroy(__first, __last);
143  }
144 
145 _GLIBCXX_END_NAMESPACE
146 
147 #endif /* _STL_CONSTRUCT_H */
148 
void _Construct(_T1 *__p, const _T2 &__value)
Definition: stl_construct.h:70
void _Destroy(_Tp *__pointer)
Definition: stl_construct.h:82