defalloc.h Source File

00001 // Backward-compat support -*- C++ -*-
00002 
00003 // Copyright (C) 2001 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 /*
00031  *
00032  * Copyright (c) 1994
00033  * Hewlett-Packard Company
00034  *
00035  * Permission to use, copy, modify, distribute and sell this software
00036  * and its documentation for any purpose is hereby granted without fee,
00037  * provided that the above copyright notice appear in all copies and
00038  * that both that copyright notice and this permission notice appear
00039  * in supporting documentation.  Hewlett-Packard Company makes no
00040  * representations about the suitability of this software for any
00041  * purpose.  It is provided "as is" without express or implied warranty.
00042  *
00043  */
00044 
00045 // Inclusion of this file is DEPRECATED.  This is the original HP
00046 // default allocator.  It is provided only for backward compatibility.
00047 // This file WILL BE REMOVED in a future release.
00048 //
00049 // DO NOT USE THIS FILE unless you have an old container implementation
00050 // that requires an allocator with the HP-style interface.  
00051 //
00052 // Standard-conforming allocators have a very different interface.  The
00053 // standard default allocator is declared in the header <memory>.
00054 
00055 #ifndef _CPP_BACKWARD_DEFALLOC_H
00056 #define _CPP_BACKWARD_DEFALLOC_H 1
00057 
00058 #include "backward_warning.h"
00059 #include "new.h"
00060 #include <stddef.h>
00061 #include <stdlib.h>
00062 #include <limits.h> 
00063 #include "iostream.h" 
00064 #include "algobase.h"
00065 
00066 
00067 template <class _Tp>
00068 inline _Tp* allocate(ptrdiff_t __size, _Tp*) {
00069     set_new_handler(0);
00070     _Tp* __tmp = (_Tp*)(::operator new((size_t)(__size * sizeof(_Tp))));
00071     if (__tmp == 0) {
00072     cerr << "out of memory" << endl; 
00073     exit(1);
00074     }
00075     return __tmp;
00076 }
00077 
00078 
00079 template <class _Tp>
00080 inline void deallocate(_Tp* __buffer) {
00081     ::operator delete(__buffer);
00082 }
00083 
00084 template <class _Tp>
00085 class allocator {
00086 public:
00087     typedef _Tp value_type;
00088     typedef _Tp* pointer;
00089     typedef const _Tp* const_pointer;
00090     typedef _Tp& reference;
00091     typedef const _Tp& const_reference;
00092     typedef size_t size_type;
00093     typedef ptrdiff_t difference_type;
00094     pointer allocate(size_type __n) { 
00095     return ::allocate((difference_type)__n, (pointer)0);
00096     }
00097     void deallocate(pointer __p) { ::deallocate(__p); }
00098     pointer address(reference __x) { return (pointer)&__x; }
00099     const_pointer const_address(const_reference __x) { 
00100     return (const_pointer)&__x; 
00101     }
00102     size_type init_page_size() { 
00103     return max(size_type(1), size_type(4096/sizeof(_Tp))); 
00104     }
00105     size_type max_size() const { 
00106     return max(size_type(1), size_type(UINT_MAX/sizeof(_Tp))); 
00107     }
00108 };
00109 
00110 class allocator<void> {
00111 public:
00112     typedef void* pointer;
00113 };
00114 
00115 
00116 
00117 #endif /* _CPP_BACKWARD_DEFALLOC_H */