defalloc.h revision 169691
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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 67template <class _Tp> 68inline _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 79template <class _Tp> 80inline void deallocate(_Tp* __buffer) { 81 ::operator delete(__buffer); 82} 83 84template <class _Tp> 85class allocator { 86public: 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 110class allocator<void> { 111public: 112 typedef void* pointer; 113}; 114 115 116 117#endif /* _BACKWARD_DEFALLOC_H */ 118