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54c1bf78 | 1 | // <memory> -*- C++ -*- |
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2 | |
3 | // Copyright (C) 2001 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 2, 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 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING. If not, write to the Free | |
18 | // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
19 | // USA. | |
20 | ||
21 | // As a special exception, you may use this file as part of a free software | |
22 | // library without restriction. Specifically, if other files instantiate | |
23 | // templates or use macros or inline functions from this file, or you compile | |
24 | // this file and link it with other files to produce an executable, this | |
25 | // file does not by itself cause the resulting executable to be covered by | |
26 | // the GNU General Public License. This exception does not however | |
27 | // invalidate any other reasons why the executable file might be covered by | |
28 | // the GNU General Public License. | |
29 | ||
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30 | /* |
31 | * Copyright (c) 1997-1999 | |
32 | * Silicon Graphics Computer Systems, Inc. | |
33 | * | |
34 | * Permission to use, copy, modify, distribute and sell this software | |
35 | * and its documentation for any purpose is hereby granted without fee, | |
36 | * provided that the above copyright notice appear in all copies and | |
37 | * that both that copyright notice and this permission notice appear | |
38 | * in supporting documentation. Silicon Graphics makes no | |
39 | * representations about the suitability of this software for any | |
40 | * purpose. It is provided "as is" without express or implied warranty. | |
41 | * | |
42 | */ | |
43 | ||
44 | /** @file std_memory.h | |
45 | * This is an internal header file, included by other library headers. | |
46 | * You should not attempt to use it directly. | |
2f9d51b8 PE |
47 | */ |
48 | ||
725dc051 | 49 | #ifndef _CPP_MEMORY |
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50 | #define _CPP_MEMORY 1 |
51 | ||
52 | #pragma GCC system_header | |
53 | ||
54 | #include <bits/stl_algobase.h> | |
55 | #include <bits/stl_alloc.h> | |
56 | #include <bits/stl_construct.h> | |
57 | #include <bits/stl_iterator_base_types.h> //for iterator_traits | |
58 | #include <bits/stl_tempbuf.h> | |
59 | #include <bits/stl_uninitialized.h> | |
60 | #include <bits/stl_raw_storage_iter.h> | |
61 | ||
62 | namespace std | |
63 | { | |
64 | ||
65 | template<class _Tp1> struct auto_ptr_ref { | |
66 | _Tp1* _M_ptr; | |
67 | auto_ptr_ref(_Tp1* __p) : _M_ptr(__p) {} | |
68 | }; | |
69 | ||
70 | /** | |
71 | * A simple smart pointer providing strict ownership semantics. (More later.) | |
72 | */ | |
73 | template <class _Tp> class auto_ptr { | |
74 | private: | |
75 | _Tp* _M_ptr; | |
76 | ||
77 | public: | |
78 | typedef _Tp element_type; | |
79 | ||
80 | explicit auto_ptr(_Tp* __p = 0) throw() : _M_ptr(__p) {} | |
81 | auto_ptr(auto_ptr& __a) throw() : _M_ptr(__a.release()) {} | |
82 | ||
83 | template <class _Tp1> auto_ptr(auto_ptr<_Tp1>& __a) throw() | |
84 | : _M_ptr(__a.release()) {} | |
85 | ||
86 | auto_ptr& operator=(auto_ptr& __a) throw() { | |
87 | reset(__a.release()); | |
88 | return *this; | |
89 | } | |
90 | ||
91 | template <class _Tp1> | |
92 | auto_ptr& operator=(auto_ptr<_Tp1>& __a) throw() { | |
93 | reset(__a.release()); | |
94 | return *this; | |
95 | } | |
96 | ||
97 | // Note: The C++ standard says there is supposed to be an empty throw | |
98 | // specification here, but omitting it is standard conforming. Its | |
99 | // presence can be detected only if _Tp::~_Tp() throws, but (17.4.3.6/2) | |
100 | // this is prohibited. | |
101 | ~auto_ptr() { delete _M_ptr; } | |
102 | ||
103 | _Tp& operator*() const throw() { | |
104 | return *_M_ptr; | |
105 | } | |
106 | _Tp* operator->() const throw() { | |
107 | return _M_ptr; | |
108 | } | |
109 | _Tp* get() const throw() { | |
110 | return _M_ptr; | |
111 | } | |
112 | _Tp* release() throw() { | |
113 | _Tp* __tmp = _M_ptr; | |
114 | _M_ptr = 0; | |
115 | return __tmp; | |
116 | } | |
117 | void reset(_Tp* __p = 0) throw() { | |
118 | if (__p != _M_ptr) { | |
119 | delete _M_ptr; | |
120 | _M_ptr = __p; | |
121 | } | |
122 | } | |
123 | ||
124 | public: | |
125 | auto_ptr(auto_ptr_ref<_Tp> __ref) throw() | |
126 | : _M_ptr(__ref._M_ptr) {} | |
127 | ||
128 | auto_ptr& operator=(auto_ptr_ref<_Tp> __ref) throw() { | |
129 | if (__ref._M_ptr != this->get()) { | |
130 | delete _M_ptr; | |
131 | _M_ptr = __ref._M_ptr; | |
132 | } | |
133 | return *this; | |
134 | } | |
135 | ||
136 | template <class _Tp1> operator auto_ptr_ref<_Tp1>() throw() | |
137 | { return auto_ptr_ref<_Tp>(this->release()); } | |
138 | template <class _Tp1> operator auto_ptr<_Tp1>() throw() | |
139 | { return auto_ptr<_Tp1>(this->release()); } | |
140 | }; | |
141 | ||
142 | } // namespace std | |
143 | ||
144 | #endif /* _CPP_MEMORY */ | |
145 | ||
146 | ||
147 | // Local Variables: | |
148 | // mode:C++ | |
149 | // End: |