Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / contrib / gcc-3.4 / libstdc++-v3 / include / bits / allocator.h
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1// Allocators -*- C++ -*-
2
3// Copyright (C) 2001, 2002, 2003, 2004 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
30/*
31 * Copyright (c) 1996-1997
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/** @file allocator.h
44 * This is an internal header file, included by other library headers.
45 * You should not attempt to use it directly.
46 */
47
48#ifndef _ALLOCATOR_H
49#define _ALLOCATOR_H 1
50
51// Define the base class to std::allocator.
52#include <bits/c++allocator.h>
53
54namespace std
55{
56 template<typename _Tp>
57 class allocator;
58
59 template<>
60 class allocator<void>
61 {
62 public:
63 typedef size_t size_type;
64 typedef ptrdiff_t difference_type;
65 typedef void* pointer;
66 typedef const void* const_pointer;
67 typedef void value_type;
68
69 template<typename _Tp1>
70 struct rebind
71 { typedef allocator<_Tp1> other; };
72 };
73
74 /**
75 * @brief The "standard" allocator, as per [20.4].
76 *
77 * (See @link Allocators allocators info @endlink for more.)
78 */
79 template<typename _Tp>
80 class allocator: public ___glibcxx_base_allocator<_Tp>
81 {
82 public:
83 typedef size_t size_type;
84 typedef ptrdiff_t difference_type;
85 typedef _Tp* pointer;
86 typedef const _Tp* const_pointer;
87 typedef _Tp& reference;
88 typedef const _Tp& const_reference;
89 typedef _Tp value_type;
90
91 template<typename _Tp1>
92 struct rebind
93 { typedef allocator<_Tp1> other; };
94
95 allocator() throw() { }
96
97 allocator(const allocator& a) throw()
98 : ___glibcxx_base_allocator<_Tp>(a) { }
99
100 template<typename _Tp1>
101 allocator(const allocator<_Tp1>&) throw() { }
102
103 ~allocator() throw() { }
104
105 // Inherit everything else.
106 };
107
108 template<typename _T1, typename _T2>
109 inline bool
110 operator==(const allocator<_T1>&, const allocator<_T2>&)
111 { return true; }
112
113 template<typename _T1, typename _T2>
114 inline bool
115 operator!=(const allocator<_T1>&, const allocator<_T2>&)
116 { return false; }
117
118 // Inhibit implicit instantiations for required instantiations,
119 // which are defined via explicit instantiations elsewhere.
120 // NB: This syntax is a GNU extension.
121#if _GLIBCXX_EXTERN_TEMPLATE
122 extern template class allocator<char>;
123 extern template class allocator<wchar_t>;
124#endif
125
126 // Undefine.
127#undef ___glibcxx_base_allocator
128} // namespace std
129
130#endif