00001 // Allocators -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 2, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // You should have received a copy of the GNU General Public License along 00017 // with this library; see the file COPYING. If not, write to the Free 00018 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 00019 // USA. 00020 00021 // As a special exception, you may use this file as part of a free software 00022 // library without restriction. Specifically, if other files instantiate 00023 // templates or use macros or inline functions from this file, or you compile 00024 // this file and link it with other files to produce an executable, this 00025 // file does not by itself cause the resulting executable to be covered by 00026 // the GNU General Public License. This exception does not however 00027 // invalidate any other reasons why the executable file might be covered by 00028 // the GNU General Public License. 00029 00030 /* 00031 * Copyright (c) 1996-1997 00032 * Silicon Graphics Computer Systems, Inc. 00033 * 00034 * Permission to use, copy, modify, distribute and sell this software 00035 * and its documentation for any purpose is hereby granted without fee, 00036 * provided that the above copyright notice appear in all copies and 00037 * that both that copyright notice and this permission notice appear 00038 * in supporting documentation. Silicon Graphics makes no 00039 * representations about the suitability of this software for any 00040 * purpose. It is provided "as is" without express or implied warranty. 00041 */ 00042 00048 #ifndef _ALLOCATOR_H 00049 #define _ALLOCATOR_H 1 00050 00051 // Define the base class to std::allocator. 00052 #include <bits/c++allocator.h> 00053 00054 namespace std 00055 { 00056 template<typename _Tp> 00057 class allocator; 00058 00060 template<> 00061 class allocator<void> 00062 { 00063 public: 00064 typedef size_t size_type; 00065 typedef ptrdiff_t difference_type; 00066 typedef void* pointer; 00067 typedef const void* const_pointer; 00068 typedef void value_type; 00069 00070 template<typename _Tp1> 00071 struct rebind 00072 { typedef allocator<_Tp1> other; }; 00073 }; 00074 00081 template<typename _Tp> 00082 class allocator: public __glibcxx_base_allocator<_Tp> 00083 { 00084 public: 00085 typedef size_t size_type; 00086 typedef ptrdiff_t difference_type; 00087 typedef _Tp* pointer; 00088 typedef const _Tp* const_pointer; 00089 typedef _Tp& reference; 00090 typedef const _Tp& const_reference; 00091 typedef _Tp value_type; 00092 00093 template<typename _Tp1> 00094 struct rebind 00095 { typedef allocator<_Tp1> other; }; 00096 00097 allocator() throw() { } 00098 00099 allocator(const allocator& __a) throw() 00100 : __glibcxx_base_allocator<_Tp>(__a) { } 00101 00102 template<typename _Tp1> 00103 allocator(const allocator<_Tp1>&) throw() { } 00104 00105 ~allocator() throw() { } 00106 00107 // Inherit everything else. 00108 }; 00109 00110 template<typename _T1, typename _T2> 00111 inline bool 00112 operator==(const allocator<_T1>&, const allocator<_T2>&) 00113 { return true; } 00114 00115 template<typename _T1, typename _T2> 00116 inline bool 00117 operator!=(const allocator<_T1>&, const allocator<_T2>&) 00118 { return false; } 00119 00120 // Inhibit implicit instantiations for required instantiations, 00121 // which are defined via explicit instantiations elsewhere. 00122 // NB: This syntax is a GNU extension. 00123 #if _GLIBCXX_EXTERN_TEMPLATE 00124 extern template class allocator<char>; 00125 extern template class allocator<wchar_t>; 00126 #endif 00127 00128 // Undefine. 00129 #undef __glibcxx_base_allocator 00130 } // namespace std 00131 00132 #endif