1// nonstandard construct and destroy functions -*- C++ -*-
2
3// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4// 2009, 2010, 2011
5// Free Software Foundation, Inc.
6//
7// This file is part of the GNU ISO C++ Library.  This library is free
8// software; you can redistribute it and/or modify it under the
9// terms of the GNU General Public License as published by the
10// Free Software Foundation; either version 3, or (at your option)
11// any later version.
12
13// This library is distributed in the hope that it will be useful,
14// but WITHOUT ANY WARRANTY; without even the implied warranty of
15// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16// GNU General Public License for more details.
17
18// Under Section 7 of GPL version 3, you are granted additional
19// permissions described in the GCC Runtime Library Exception, version
20// 3.1, as published by the Free Software Foundation.
21
22// You should have received a copy of the GNU General Public License and
23// a copy of the GCC Runtime Library Exception along with this program;
24// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
25// <http://www.gnu.org/licenses/>.
26
27/*
28 *
29 * Copyright (c) 1994
30 * Hewlett-Packard Company
31 *
32 * Permission to use, copy, modify, distribute and sell this software
33 * and its documentation for any purpose is hereby granted without fee,
34 * provided that the above copyright notice appear in all copies and
35 * that both that copyright notice and this permission notice appear
36 * in supporting documentation.  Hewlett-Packard Company makes no
37 * representations about the suitability of this software for any
38 * purpose.  It is provided "as is" without express or implied warranty.
39 *
40 *
41 * Copyright (c) 1996,1997
42 * Silicon Graphics Computer Systems, Inc.
43 *
44 * Permission to use, copy, modify, distribute and sell this software
45 * and its documentation for any purpose is hereby granted without fee,
46 * provided that the above copyright notice appear in all copies and
47 * that both that copyright notice and this permission notice appear
48 * in supporting documentation.  Silicon Graphics makes no
49 * representations about the suitability of this software for any
50 * purpose.  It is provided "as is" without express or implied warranty.
51 */
52
53/** @file bits/stl_construct.h
54 *  This is an internal header file, included by other library headers.
55 *  Do not attempt to use it directly. @headername{memory}
56 */
57
58#ifndef _STL_CONSTRUCT_H
59#define _STL_CONSTRUCT_H 1
60
61#include <new>
62#include <bits/move.h>
63#include <ext/alloc_traits.h>
64
65namespace std _GLIBCXX_VISIBILITY(default)
66{
67_GLIBCXX_BEGIN_NAMESPACE_VERSION
68
69  /**
70   * Constructs an object in existing memory by invoking an allocated
71   * object's constructor with an initializer.
72   */
73#ifdef __GXX_EXPERIMENTAL_CXX0X__
74  template<typename _T1, typename... _Args>
75    inline void
76    _Construct(_T1* __p, _Args&&... __args)
77    { ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); }
78#else
79  template<typename _T1, typename _T2>
80    inline void
81    _Construct(_T1* __p, const _T2& __value)
82    {
83      // _GLIBCXX_RESOLVE_LIB_DEFECTS
84      // 402. wrong new expression in [some_]allocator::construct
85      ::new(static_cast<void*>(__p)) _T1(__value);
86    }
87#endif
88
89  /**
90   * Destroy the object pointed to by a pointer type.
91   */
92  template<typename _Tp>
93    inline void
94    _Destroy(_Tp* __pointer)
95    { __pointer->~_Tp(); }
96
97  template<bool>
98    struct _Destroy_aux
99    {
100      template<typename _ForwardIterator>
101        static void
102        __destroy(_ForwardIterator __first, _ForwardIterator __last)
103	{
104	  for (; __first != __last; ++__first)
105	    std::_Destroy(std::__addressof(*__first));
106	}
107    };
108
109  template<>
110    struct _Destroy_aux<true>
111    {
112      template<typename _ForwardIterator>
113        static void
114        __destroy(_ForwardIterator, _ForwardIterator) { }
115    };
116
117  /**
118   * Destroy a range of objects.  If the value_type of the object has
119   * a trivial destructor, the compiler should optimize all of this
120   * away, otherwise the objects' destructors must be invoked.
121   */
122  template<typename _ForwardIterator>
123    inline void
124    _Destroy(_ForwardIterator __first, _ForwardIterator __last)
125    {
126      typedef typename iterator_traits<_ForwardIterator>::value_type
127                       _Value_type;
128      std::_Destroy_aux<__has_trivial_destructor(_Value_type)>::
129	__destroy(__first, __last);
130    }
131
132  /**
133   * Destroy a range of objects using the supplied allocator.  For
134   * nondefault allocators we do not optimize away invocation of
135   * destroy() even if _Tp has a trivial destructor.
136   */
137
138  template <typename _Tp> class allocator;
139
140  template<typename _ForwardIterator, typename _Allocator>
141    void
142    _Destroy(_ForwardIterator __first, _ForwardIterator __last,
143	     _Allocator& __alloc)
144    {
145      typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
146      for (; __first != __last; ++__first)
147	__traits::destroy(__alloc, std::__addressof(*__first));
148    }
149
150  template<typename _ForwardIterator, typename _Tp>
151    inline void
152    _Destroy(_ForwardIterator __first, _ForwardIterator __last,
153	     allocator<_Tp>&)
154    {
155      _Destroy(__first, __last);
156    }
157
158_GLIBCXX_END_NAMESPACE_VERSION
159} // namespace
160
161#endif /* _STL_CONSTRUCT_H */
162
163