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1 : : // nonstandard construct and destroy functions -*- C++ -*-
2 : :
3 : : // Copyright (C) 2001-2015 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 3, 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 : : // Under Section 7 of GPL version 3, you are granted additional
17 : : // permissions described in the GCC Runtime Library Exception, version
18 : : // 3.1, as published by the Free Software Foundation.
19 : :
20 : : // You should have received a copy of the GNU General Public License and
21 : : // a copy of the GCC Runtime Library Exception along with this program;
22 : : // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 : : // <http://www.gnu.org/licenses/>.
24 : :
25 : : /*
26 : : *
27 : : * Copyright (c) 1994
28 : : * Hewlett-Packard Company
29 : : *
30 : : * Permission to use, copy, modify, distribute and sell this software
31 : : * and its documentation for any purpose is hereby granted without fee,
32 : : * provided that the above copyright notice appear in all copies and
33 : : * that both that copyright notice and this permission notice appear
34 : : * in supporting documentation. Hewlett-Packard Company makes no
35 : : * representations about the suitability of this software for any
36 : : * purpose. It is provided "as is" without express or implied warranty.
37 : : *
38 : : *
39 : : * Copyright (c) 1996,1997
40 : : * Silicon Graphics Computer Systems, Inc.
41 : : *
42 : : * Permission to use, copy, modify, distribute and sell this software
43 : : * and its documentation for any purpose is hereby granted without fee,
44 : : * provided that the above copyright notice appear in all copies and
45 : : * that both that copyright notice and this permission notice appear
46 : : * in supporting documentation. Silicon Graphics makes no
47 : : * representations about the suitability of this software for any
48 : : * purpose. It is provided "as is" without express or implied warranty.
49 : : */
50 : :
51 : : /** @file bits/stl_construct.h
52 : : * This is an internal header file, included by other library headers.
53 : : * Do not attempt to use it directly. @headername{memory}
54 : : */
55 : :
56 : : #ifndef _STL_CONSTRUCT_H
57 : : #define _STL_CONSTRUCT_H 1
58 : :
59 : : #include <new>
60 : : #include <bits/move.h>
61 : : #include <ext/alloc_traits.h>
62 : :
63 : : namespace std _GLIBCXX_VISIBILITY(default)
64 : : {
65 : : _GLIBCXX_BEGIN_NAMESPACE_VERSION
66 : :
67 : : /**
68 : : * Constructs an object in existing memory by invoking an allocated
69 : : * object's constructor with an initializer.
70 : : */
71 : : #if __cplusplus >= 201103L
72 : : template<typename _T1, typename... _Args>
73 : : inline void
74 : : _Construct(_T1* __p, _Args&&... __args)
75 [ + - ][ # # ]: 2 : { ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); }
[ - # ][ + - ]
[ # # ][ + ]
76 : : #else
77 : : template<typename _T1, typename _T2>
78 : : inline void
79 : : _Construct(_T1* __p, const _T2& __value)
80 : : {
81 : : // _GLIBCXX_RESOLVE_LIB_DEFECTS
82 : : // 402. wrong new expression in [some_]allocator::construct
83 : : ::new(static_cast<void*>(__p)) _T1(__value);
84 : : }
85 : : #endif
86 : :
87 : : /**
88 : : * Destroy the object pointed to by a pointer type.
89 : : */
90 : : template<typename _Tp>
91 : : inline void
92 : : _Destroy(_Tp* __pointer)
93 : 2 : { __pointer->~_Tp(); }
94 : :
95 : : template<bool>
96 : : struct _Destroy_aux
97 : : {
98 : : template<typename _ForwardIterator>
99 : : static void
100 : : __destroy(_ForwardIterator __first, _ForwardIterator __last)
101 : : {
102 [ + + ][ # # ]: 15 : for (; __first != __last; ++__first)
[ # # ][ # # ]
[ + + ][ # # ]
[ + + ]
103 : : std::_Destroy(std::__addressof(*__first));
104 : : }
105 : : };
106 : :
107 : : template<>
108 : : struct _Destroy_aux<true>
109 : : {
110 : : template<typename _ForwardIterator>
111 : : static void
112 : : __destroy(_ForwardIterator, _ForwardIterator) { }
113 : : };
114 : :
115 : : /**
116 : : * Destroy a range of objects. If the value_type of the object has
117 : : * a trivial destructor, the compiler should optimize all of this
118 : : * away, otherwise the objects' destructors must be invoked.
119 : : */
120 : : template<typename _ForwardIterator>
121 : : inline void
122 : : _Destroy(_ForwardIterator __first, _ForwardIterator __last)
123 : : {
124 : : typedef typename iterator_traits<_ForwardIterator>::value_type
125 : : _Value_type;
126 : : std::_Destroy_aux<__has_trivial_destructor(_Value_type)>::
127 : : __destroy(__first, __last);
128 : : }
129 : :
130 : : /**
131 : : * Destroy a range of objects using the supplied allocator. For
132 : : * nondefault allocators we do not optimize away invocation of
133 : : * destroy() even if _Tp has a trivial destructor.
134 : : */
135 : :
136 : : template<typename _ForwardIterator, typename _Allocator>
137 : : void
138 : : _Destroy(_ForwardIterator __first, _ForwardIterator __last,
139 : : _Allocator& __alloc)
140 : : {
141 : : typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
142 : : for (; __first != __last; ++__first)
143 : : __traits::destroy(__alloc, std::__addressof(*__first));
144 : : }
145 : :
146 : : template<typename _ForwardIterator, typename _Tp>
147 : : inline void
148 : : _Destroy(_ForwardIterator __first, _ForwardIterator __last,
149 : : allocator<_Tp>&)
150 : : {
151 : : _Destroy(__first, __last);
152 : : }
153 : :
154 : : _GLIBCXX_END_NAMESPACE_VERSION
155 : : } // namespace std
156 : :
157 : : #endif /* _STL_CONSTRUCT_H */
158 : :
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