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+// <memory> -*- C++ -*-
+
+// Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+/*
+ * Copyright (c) 1997-1999
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * 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. Silicon Graphics makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ */
+
+/** @file memory
+ * This is a Standard C++ Library header. You should @c #include this header
+ * in your programs, rather than any of the "st[dl]_*.h" implementation files.
+ */
+
+#ifndef _CPP_MEMORY
+#define _CPP_MEMORY 1
+
+#pragma GCC system_header
+
+#include <bits/stl_algobase.h>
+#include <bits/stl_alloc.h>
+#include <bits/stl_construct.h>
+#include <bits/stl_iterator_base_types.h> //for iterator_traits
+#include <bits/stl_uninitialized.h>
+#include <bits/stl_raw_storage_iter.h>
+
+namespace std
+{
+
+ /**
+ * @if maint
+ * This is a helper function. The unused second parameter exists to
+ * permit the real get_temporary_buffer to use template parameter deduction.
+ * @endif
+ */
+ template <class _Tp>
+ pair<_Tp*, ptrdiff_t>
+ __get_temporary_buffer(ptrdiff_t __len, _Tp*)
+ {
+ if (__len > ptrdiff_t(INT_MAX / sizeof(_Tp)))
+ __len = INT_MAX / sizeof(_Tp);
+
+ while (__len > 0) {
+ _Tp* __tmp = (_Tp*) std::malloc((std::size_t)__len * sizeof(_Tp));
+ if (__tmp != 0)
+ return pair<_Tp*, ptrdiff_t>(__tmp, __len);
+ __len /= 2;
+ }
+
+ return pair<_Tp*, ptrdiff_t>((_Tp*)0, 0);
+ }
+
+ /**
+ * @brief This is a mostly-useless wrapper around malloc().
+ * @param len The number of objects of type Tp.
+ * @return See full description.
+ *
+ * Reinventing the wheel, but this time with prettier spokes!
+ *
+ * This function tries to obtain storage for @c len adjacent Tp objects.
+ * The objects themselves are not constructed, of course. A pair<> is
+ * returned containing "the buffer s address and capacity (in the units of
+ * sizeof(Tp)), or a pair of 0 values if no storage can be obtained."
+ * Note that the capacity obtained may be less than that requested if the
+ * memory is unavailable; you should compare len with the .second return
+ * value.
+ */
+ template <class _Tp>
+ inline pair<_Tp*, ptrdiff_t> get_temporary_buffer(ptrdiff_t __len) {
+ return __get_temporary_buffer(__len, (_Tp*) 0);
+ }
+
+ /**
+ * @brief The companion to get_temporary_buffer().
+ * @param p A buffer previously allocated by get_temporary_buffer.
+ * @return None.
+ *
+ * Frees the memory pointed to by p.
+ */
+ template <class _Tp>
+ void return_temporary_buffer(_Tp* __p) {
+ std::free(__p);
+ }
+
+
+template <class _Tp1>
+ struct auto_ptr_ref
+{
+ _Tp1* _M_ptr;
+ auto_ptr_ref(_Tp1* __p) : _M_ptr(__p) {}
+};
+
+/**
+ * A simple smart pointer providing strict ownership semantics. (More later.)
+*/
+template <class _Tp>
+ class auto_ptr
+{
+private:
+ _Tp* _M_ptr;
+
+public:
+ typedef _Tp element_type;
+
+ explicit auto_ptr(_Tp* __p = 0) throw() : _M_ptr(__p) {}
+ auto_ptr(auto_ptr& __a) throw() : _M_ptr(__a.release()) {}
+
+ template <class _Tp1> auto_ptr(auto_ptr<_Tp1>& __a) throw()
+ : _M_ptr(__a.release()) {}
+
+ auto_ptr& operator=(auto_ptr& __a) throw() {
+ reset(__a.release());
+ return *this;
+ }
+
+ template <class _Tp1>
+ auto_ptr& operator=(auto_ptr<_Tp1>& __a) throw() {
+ reset(__a.release());
+ return *this;
+ }
+
+ // Note: The C++ standard says there is supposed to be an empty throw
+ // specification here, but omitting it is standard conforming. Its
+ // presence can be detected only if _Tp::~_Tp() throws, but (17.4.3.6/2)
+ // this is prohibited.
+ ~auto_ptr() { delete _M_ptr; }
+
+ _Tp& operator*() const throw() {
+ return *_M_ptr;
+ }
+ _Tp* operator->() const throw() {
+ return _M_ptr;
+ }
+ _Tp* get() const throw() {
+ return _M_ptr;
+ }
+ _Tp* release() throw() {
+ _Tp* __tmp = _M_ptr;
+ _M_ptr = 0;
+ return __tmp;
+ }
+ void reset(_Tp* __p = 0) throw() {
+ if (__p != _M_ptr) {
+ delete _M_ptr;
+ _M_ptr = __p;
+ }
+ }
+
+public:
+ auto_ptr(auto_ptr_ref<_Tp> __ref) throw()
+ : _M_ptr(__ref._M_ptr) {}
+
+ auto_ptr& operator=(auto_ptr_ref<_Tp> __ref) throw() {
+ if (__ref._M_ptr != this->get()) {
+ delete _M_ptr;
+ _M_ptr = __ref._M_ptr;
+ }
+ return *this;
+ }
+
+ template <class _Tp1> operator auto_ptr_ref<_Tp1>() throw()
+ { return auto_ptr_ref<_Tp>(this->release()); }
+ template <class _Tp1> operator auto_ptr<_Tp1>() throw()
+ { return auto_ptr<_Tp1>(this->release()); }
+};
+
+} // namespace std
+
+#endif /* _CPP_MEMORY */
+