windows-nt/Source/XPSP1/NT/base/crts/libw32/include/xmemory

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2020-09-26 03:20:57 -05:00
// xmemory internal header (from <memory>)
#pragma once
#ifndef _XMEMORY_
#define _XMEMORY_
#include <cstdlib>
#include <new>
#include <xutility>
#pragma pack(push,8)
#pragma warning(push,3)
#pragma warning(disable: 4100)
#ifndef _FARQ /* specify standard memory model */
#define _FARQ
#define _PDFT ptrdiff_t
#define _SIZT size_t
#endif
#define _CPOINTER_X(T, A) \
typename A::_TEMPLATE_MEMBER rebind<T>::other::const_pointer
#define _CREFERENCE_X(T, A) \
typename A::_TEMPLATE_MEMBER rebind<T>::other::const_reference
#define _POINTER_X(T, A) \
typename A::_TEMPLATE_MEMBER rebind<T>::other::pointer
#define _REFERENCE_X(T, A) \
typename A::_TEMPLATE_MEMBER rebind<T>::other::reference
_STD_BEGIN
// TEMPLATE FUNCTION _Allocate
template<class _Ty> inline
_Ty _FARQ *_Allocate(_SIZT _Count, _Ty _FARQ *)
{ // allocate storage for _Count elements of type _Ty
return ((_Ty _FARQ *)operator new(_Count * sizeof (_Ty)));
}
// TEMPLATE FUNCTION _Construct
template<class _T1,
class _T2> inline
void _Construct(_T1 _FARQ *_Ptr, const _T2& _Val)
{ // construct object at _Ptr with value _Val
new ((void _FARQ *)_Ptr) _T1(_Val);
}
// TEMPLATE FUNCTION _Destroy
template<class _Ty> inline
void _Destroy(_Ty _FARQ *_Ptr)
{ // destroy object at _Ptr
_DESTRUCTOR(_Ty, _Ptr);
}
template<> inline
void _Destroy(char _FARQ *)
{ // destroy a char (do nothing)
}
template<> inline
void _Destroy(wchar_t _FARQ *)
{ // destroy a wchar_t (do nothing)
}
// TEMPLATE CLASS allocator
template<class _Ty>
class allocator
{ // generic allocator for objects of class _Ty
public:
typedef _SIZT size_type;
typedef _PDFT difference_type;
typedef _Ty _FARQ *pointer;
typedef const _Ty _FARQ *const_pointer;
typedef _Ty _FARQ& reference;
typedef const _Ty _FARQ& const_reference;
typedef _Ty value_type;
template<class _Other>
struct rebind
{ // convert an allocator<_Ty> to an allocator <_Other>
typedef allocator<_Other> other;
};
pointer address(reference _Val) const
{ // return address of mutable _Val
return (&_Val);
}
const_pointer address(const_reference _Val) const
{ // return address of nonmutable _Val
return (&_Val);
}
allocator()
{ // construct default allocator (do nothing)
}
allocator(const allocator<_Ty>&)
{ // construct by copying (do nothing)
}
template<class _Other>
allocator(const allocator<_Other>&)
{ // construct from a related allocator (do nothing)
}
template<class _Other>
allocator<_Ty>& operator=(const allocator<_Other>&)
{ // assign from a related allocator (do nothing)
return (*this);
}
template<class _Other>
pointer allocate(size_type _Count, const _Other *)
{ // allocate array of _Count elements, ignore hint
// don't call _Allocate directly, in case class is dllimport
return (allocate(_Count));
}
pointer allocate(size_type _Count)
{ // allocate array of _Count elements
return (_Allocate(_Count, (pointer)0));
}
void deallocate(pointer _Ptr, size_type)
{ // deallocate object at _Ptr, ignore size
operator delete(_Ptr);
}
void construct(pointer _Ptr, const _Ty& _Val)
{ // construct object at _Ptr with value _Val
_Construct(_Ptr, _Val);
}
void destroy(pointer _Ptr)
{ // destroy object at _Ptr
_Destroy(_Ptr);
}
_SIZT max_size() const
{ // estimate maximum array size
_SIZT _Count = (_SIZT)(-1) / sizeof (_Ty);
return (0 < _Count ? _Count : 1);
}
};
// allocator TEMPLATE OPERATORS
template<class _Ty,
class _Other> inline
bool operator==(const allocator<_Ty>&, const allocator<_Other>&)
{ // test for allocator equality (always true)
return (true);
}
template<class _Ty,
class _Other> inline
bool operator!=(const allocator<_Ty>&, const allocator<_Other>&)
{ // test for allocator inequality (always false)
return (false);
}
// CLASS allocator<void>
template<> class _CRTIMP2 allocator<void>
{ // generic allocator for type void
public:
typedef void _Ty;
typedef _Ty _FARQ *pointer;
typedef const _Ty _FARQ *const_pointer;
typedef _Ty value_type;
template<class _Other>
struct rebind
{ // convert an allocator<void> to an allocator <_Other>
typedef allocator<_Other> other;
};
allocator()
{ // construct default allocator (do nothing)
}
allocator(const allocator<_Ty>&)
{ // construct by copying (do nothing)
}
template<class _Other>
allocator(const allocator<_Other>&)
{ // construct from related allocator (do nothing)
}
template<class _Other>
allocator<_Ty>& operator=(const allocator<_Other>&)
{ // assign from a related allocator (do nothing)
return (*this);
}
};
// TEMPLATE FUNCTION _Destroy_range
template<class _Ty,
class _Alloc> inline
void _Destroy_range(_Ty *_First, _Ty *_Last, _Alloc& _Al)
{ // destroy [_First, _Last)
_Destroy_range(_First, _Last, _Al, _Ptr_cat(_First, _Last));
}
template<class _Ty,
class _Alloc> inline
void _Destroy_range(_Ty *_First, _Ty *_Last, _Alloc& _Al,
_Nonscalar_ptr_iterator_tag)
{ // destroy [_First, _Last), arbitrary type
for (; _First != _Last; ++_First)
_Al.destroy(_First);
}
template<class _Ty,
class _Alloc> inline
void _Destroy_range(_Ty *_First, _Ty *_Last, _Alloc& _Al,
_Scalar_ptr_iterator_tag)
{ // destroy [_First, _Last), scalar type (do nothing)
}
_STD_END
#pragma warning(default: 4100)
#pragma warning(pop)
#pragma pack(pop)
#endif /* _XMEMORY_ */
/*
* Copyright (c) 1992-2001 by P.J. Plauger. ALL RIGHTS RESERVED.
* Consult your license regarding permissions and restrictions.
*/
/*
* This file is derived from software bearing the following
* restrictions:
*
* Copyright (c) 1994
* Hewlett-Packard Company
*
* Permission to use, copy, modify, distribute and sell this
* software and its documentation for any purpose is hereby
* granted without fee, provided that the above copyright notice
* appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation.
* Hewlett-Packard Company makes no representations about the
* suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
V3.10:0009 */