00001 // Allocator that wraps operator new -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2002, 2003, 2004 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 #ifndef _NEW_ALLOCATOR_H 00031 #define _NEW_ALLOCATOR_H 1 00032 00033 #include <new> 00034 00035 namespace __gnu_cxx 00036 { 00046 template<typename _Tp> 00047 class new_allocator 00048 { 00049 public: 00050 typedef size_t size_type; 00051 typedef ptrdiff_t difference_type; 00052 typedef _Tp* pointer; 00053 typedef const _Tp* const_pointer; 00054 typedef _Tp& reference; 00055 typedef const _Tp& const_reference; 00056 typedef _Tp value_type; 00057 00058 template<typename _Tp1> 00059 struct rebind 00060 { typedef new_allocator<_Tp1> other; }; 00061 00062 new_allocator() throw() { } 00063 00064 new_allocator(const new_allocator&) throw() { } 00065 00066 template<typename _Tp1> 00067 new_allocator(const new_allocator<_Tp1>&) throw() { } 00068 00069 ~new_allocator() throw() { } 00070 00071 pointer 00072 address(reference __x) const { return &__x; } 00073 00074 const_pointer 00075 address(const_reference __x) const { return &__x; } 00076 00077 // NB: __n is permitted to be 0. The C++ standard says nothing 00078 // about what the return value is when __n == 0. 00079 pointer 00080 allocate(size_type __n, const void* = 0) 00081 { return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp))); } 00082 00083 // __p is not permitted to be a null pointer. 00084 void 00085 deallocate(pointer __p, size_type) 00086 { ::operator delete(__p); } 00087 00088 size_type 00089 max_size() const throw() 00090 { return size_t(-1) / sizeof(_Tp); } 00091 00092 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00093 // 402. wrong new expression in [some_] allocator::construct 00094 void 00095 construct(pointer __p, const _Tp& __val) 00096 { ::new(__p) _Tp(__val); } 00097 00098 void 00099 destroy(pointer __p) { __p->~_Tp(); } 00100 }; 00101 00102 template<typename _Tp> 00103 inline bool 00104 operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&) 00105 { return true; } 00106 00107 template<typename _Tp> 00108 inline bool 00109 operator!=(const new_allocator<_Tp>&, const new_allocator<_Tp>&) 00110 { return false; } 00111 } // namespace __gnu_cxx 00112 00113 #endif