libstdc++-v3/include/backward/defalloc.h

   1 // Backward-compat support -*- C++ -*-
   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
  30 /*
  31  *
  32  * Copyright (c) 1994
  33  * Hewlett-Packard Company
  34  *
  35  * Permission to use, copy, modify, distribute and sell this software
  36  * and its documentation for any purpose is hereby granted without fee,
  37  * provided that the above copyright notice appear in all copies and
  38  * that both that copyright notice and this permission notice appear
  39  * in supporting documentation.  Hewlett-Packard Company makes no
  40  * representations about the suitability of this software for any
  41  * purpose.  It is provided "as is" without express or implied warranty.
  42  *
  43  */
  44
  45 // Inclusion of this file is DEPRECATED.  This is the original HP
  46 // default allocator.  It is provided only for backward compatibility.
  47 // This file WILL BE REMOVED in a future release.
  48 //
  49 // DO NOT USE THIS FILE unless you have an old container implementation
  50 // that requires an allocator with the HP-style interface.
  51 //
  52 // Standard-conforming allocators have a very different interface.  The
  53 // standard default allocator is declared in the header <memory>.
  54
  55 #ifndef _BACKWARD_DEFALLOC_H
  56 #define _BACKWARD_DEFALLOC_H 1
  57
  58 #include "backward_warning.h"
  59 #include "new.h"
  60 #include <stddef.h>
  61 #include <stdlib.h>
  62 #include <limits.h>
  63 #include "iostream.h"
  64 #include "algobase.h"
  65
  66
  67 template <class _Tp>
  68 inline _Tp* allocate(ptrdiff_t __size, _Tp*) {
  69     set_new_handler(0);
  70     _Tp* __tmp = (_Tp*)(::operator new((size_t)(__size * sizeof(_Tp))));
  71     if (__tmp == 0) {
  72         cerr << "out of memory" << endl;
  73         exit(1);
  74     }
  75     return __tmp;
  76 }
  77
  78
  79 template <class _Tp>
  80 inline void deallocate(_Tp* __buffer) {
  81     ::operator delete(__buffer);
  82 }
  83
  84 template <class _Tp>
  85 class allocator {
  86 public:
  87     typedef _Tp value_type;
  88     typedef _Tp* pointer;
  89     typedef const _Tp* const_pointer;
  90     typedef _Tp& reference;
  91     typedef const _Tp& const_reference;
  92     typedef size_t size_type;
  93     typedef ptrdiff_t difference_type;
  94     pointer allocate(size_type __n) {
  95         return ::allocate((difference_type)__n, (pointer)0);
  96     }
  97     void deallocate(pointer __p) { ::deallocate(__p); }
  98     pointer address(reference __x) { return (pointer)&__x; }
  99     const_pointer const_address(const_reference __x) {
 100         return (const_pointer)&__x;
 101     }
 102     size_type init_page_size() {
 103         return max(size_type(1), size_type(4096/sizeof(_Tp)));
 104     }
 105     size_type max_size() const {
 106         return max(size_type(1), size_type(UINT_MAX/sizeof(_Tp)));
 107     }
 108 };
 109
 110 class allocator<void> {
 111 public:
 112     typedef void* pointer;
 113 };
 114
 115
 116
 117 #endif /* _BACKWARD_DEFALLOC_H */