/*
 * Copyright (c) 1997-1999
 * Silicon Graphics Computer Systems, Inc.
 *
 * Copyright (c) 1999 
 * Boris Fomitchev
 *
 * This material is provided "as is", with absolutely no warranty expressed
 * or implied. Any use is at your own risk.
 *
 * Permission to use or copy this software for any purpose is hereby granted 
 * without fee, provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 *
 */

#ifndef __SGI_STL_MEMORY
# define __SGI_STL_MEMORY

# ifndef __SGI_STL_INTERNAL_ALLOC_H
#  include <stl_alloc.h>
# endif

# ifndef __SGI_STL_INTERNAL_TEMPBUF_H
#  include <stl_tempbuf.h>
# endif

# ifndef __SGI_STL_INTERNAL_RAW_STORAGE_ITER_H
#  include <stl_raw_storage_iter.h>
# endif

# if defined (__STL_USE_OWN_NAMESPACE)
#  include __STL_NATIVE_HEADER(memory)
# endif

#if __MSL__ >= 0x2405	/*  980401 vss  MSL 2.4  Pro 3 Release  */	
# include <new_mem.h>
#endif

__STL_BEGIN_NAMESPACE


struct __auto_ptr_base {
  void* _M_p;
};

template <class _Tp> class auto_ptr_ref {
public:
  __auto_ptr_base& _M_r;
  _Tp* const _M_p;
  auto_ptr_ref(_Tp* __p, __auto_ptr_base& __r) : _M_r(__r), _M_p(__p) {}
  _Tp* release() const { _M_r._M_p = 0; return _M_p; }
};

template<class _Tp> struct auto_ptr : public __auto_ptr_base  {

  typedef _Tp element_type;
  typedef auto_ptr<_Tp> _Self;

  _Tp* get() const __STL_NOTHROW { return __STATIC_CAST(_Tp*,_M_p); }
  _Tp* release() __STL_NOTHROW { _Tp* __px = get(); _M_p = 0; return __px; }
  void reset(_Tp* __px=0) __STL_NOTHROW { if (__px != get()) delete get(), _M_p = __px; }
  
  explicit auto_ptr() __STL_NOTHROW { _M_p = 0; }

  explicit auto_ptr(_Tp* __px) __STL_NOTHROW { _M_p = __px; }

  auto_ptr(_Self& __r) __STL_NOTHROW { _M_p = __r.release(); }
  _Self& operator=(_Self& __r) __STL_NOTHROW {
    reset(__r.release());
    return *this;
  }

#if defined (__STL_MEMBER_TEMPLATES) && defined (__STL_FUNCTION_TMPL_PARTIAL_ORDER)
  template<class _Tp1> auto_ptr(auto_ptr<_Tp1>& __r) __STL_NOTHROW {
    _Tp* __px = __r.release();
    _M_p = __px;
  }
  
  template<class _Tp1> auto_ptr& operator=(auto_ptr<_Tp1>& __r) __STL_NOTHROW {
    reset(__r.release());
    return *this;
  }
#endif /* __STL_MEMBER_TEMPLATES */


  ~auto_ptr() { delete get(); }

  _Tp& operator*() const __STL_NOTHROW { return *get(); }

# if defined (__SGI_STL_NO_ARROW_OPERATOR)
#  if !defined (__STL_NO_PROXY_ARROW_OPERATOR)
  __arrow_op_dispatch<_Tp&, _Tp*> operator->() const __STL_NOTHROW {
    return __arrow_op_dispatch<_Tp&, _Tp*>(*get());
  }
#  endif
# else
  _Tp* operator->() const __STL_NOTHROW { return get(); }
# endif

  auto_ptr(auto_ptr_ref<_Tp> __r) __STL_NOTHROW {
    _M_p = __r.release();
  }

  _Self& operator=(auto_ptr_ref<_Tp> __r) __STL_NOTHROW {
    reset(__r.release());
    return *this;
  }
# if defined(__STL_MEMBER_TEMPLATES) && !defined(__STL_NO_TEMPLATE_CONVERSIONS)
  template<class _Tp1> operator auto_ptr_ref<_Tp1>() __STL_NOTHROW {
    return auto_ptr_ref<_Tp1>(get(),*this);
  }
  template<class _Tp1> operator auto_ptr<_Tp1>() __STL_NOTHROW {
    return auto_ptr<_Tp1>(release());
  }
# else
  operator auto_ptr_ref<_Tp>() __STL_NOTHROW
  	{ return auto_ptr_ref<_Tp>(get(),*this); }
# endif
};

__STL_END_NAMESPACE

#endif /* __SGI_STL_MEMORY */

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