88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*/
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// Inclusion of this file is DEPRECATED. This is the original HP
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// default allocator. It is provided only for backward compatibility.
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// This file WILL BE REMOVED in a future release.
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//
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// DO NOT USE THIS FILE unless you have an old container implementation
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// that requires an allocator with the HP-style interface.
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//
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// Standard-conforming allocators have a very different interface. The
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// standard default allocator is declared in the header <memory>.
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#ifndef DEFALLOC_H
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#define DEFALLOC_H
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#include <new.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <iostream.h>
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#include <algobase.h>
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template <class T>
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inline T* allocate(ptrdiff_t size, T*) {
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set_new_handler(0);
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T* tmp = (T*)(::operator new((size_t)(size * sizeof(T))));
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if (tmp == 0) {
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cerr << "out of memory" << endl;
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exit(1);
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}
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return tmp;
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}
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template <class T>
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inline void deallocate(T* buffer) {
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::operator delete(buffer);
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}
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template <class T>
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class allocator {
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public:
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typedef T value_type;
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typedef T* pointer;
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typedef const T* const_pointer;
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typedef T& reference;
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typedef const T& const_reference;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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pointer allocate(size_type n) {
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return ::allocate((difference_type)n, (pointer)0);
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}
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void deallocate(pointer p) { ::deallocate(p); }
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pointer address(reference x) { return (pointer)&x; }
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const_pointer const_address(const_reference x) {
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return (const_pointer)&x;
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}
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size_type init_page_size() {
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return max(size_type(1), size_type(4096/sizeof(T)));
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}
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size_type max_size() const {
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return max(size_type(1), size_type(UINT_MAX/sizeof(T)));
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}
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};
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class allocator<void> {
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public:
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typedef void* pointer;
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};
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#endif
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