/*

* 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.

*

*/

#ifndef __SGI_STL_MEMORY

#define __SGI_STL_MEMORY

#include <stl_algobase.h>

#include <stl_alloc.h> // 这里定义有一、二级配置器，彼此合作。配置器名为 alloc。

#include <stl_construct.h> // 这里定义有全域函式construct()和 destroy()，负责物件的建构和解构。它们隶属于 STL 标准规范。

#include <stl_tempbuf.h>

#include <stl_uninitialized.h> // 这里定义有全域函式，用来充填（fill）或复制（copy）大块内存内容，它们也都隶属于 STL 标准规范

#include <stl_raw_storage_iter.h>

__STL_BEGIN_NAMESPACE

#if defined(__SGI_STL_USE_AUTO_PTR_CONVERSIONS) && \

defined(__STL_MEMBER_TEMPLATES)

template<class _Tp1> struct auto_ptr_ref {

_Tp1* _M_ptr;

auto_ptr_ref(_Tp1* __p) : _M_ptr(__p) {}

};

#endif

template <class _Tp> class auto_ptr {

private:

_Tp* _M_ptr;

public:

typedef _Tp element_type;

explicit auto_ptr(_Tp* __p = 0) __STL_NOTHROW : _M_ptr(__p) {}

auto_ptr(auto_ptr& __a) __STL_NOTHROW : _M_ptr(__a.release()) {}

#ifdef __STL_MEMBER_TEMPLATES

template <class _Tp1> auto_ptr(auto_ptr<_Tp1>& __a) __STL_NOTHROW

: _M_ptr(__a.release()) {}

#endif /* __STL_MEMBER_TEMPLATES */

auto_ptr& operator=(auto_ptr& __a) __STL_NOTHROW {

if (&__a != this) {

delete _M_ptr;

_M_ptr = __a.release();

}

return *this;

}

#ifdef __STL_MEMBER_TEMPLATES

template <class _Tp1>

auto_ptr& operator=(auto_ptr<_Tp1>& __a) __STL_NOTHROW {

if (__a.get() != this->get()) {

delete _M_ptr;

_M_ptr = __a.release();

}

return *this;

}

#endif /* __STL_MEMBER_TEMPLATES */

// 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 __STL_NOTHROW {

return *_M_ptr;

}

_Tp* operator->() const __STL_NOTHROW {

return _M_ptr;

}

_Tp* get() const __STL_NOTHROW {

return _M_ptr;

}

_Tp* release() __STL_NOTHROW {

_Tp* __tmp = _M_ptr;

_M_ptr = 0;

return __tmp;

}

void reset(_Tp* __p = 0) __STL_NOTHROW {

if (__p != _M_ptr) {

delete _M_ptr;

_M_ptr = __p;

}

}

// According to the C++ standard, these conversions are required. Most

// present-day compilers, however, do not enforce that requirement---and,

// in fact, most present-day compilers do not support the language

// features that these conversions rely on.

#if defined(__SGI_STL_USE_AUTO_PTR_CONVERSIONS) && \

defined(__STL_MEMBER_TEMPLATES)

public:

auto_ptr(auto_ptr_ref<_Tp> __ref) __STL_NOTHROW

: _M_ptr(__ref._M_ptr) {}

auto_ptr& operator=(auto_ptr_ref<_Tp> __ref) __STL_NOTHROW {

if (__ref._M_ptr != this->get()) {

delete _M_ptr;

_M_ptr = __ref._M_ptr;

}

return *this;

}

template <class _Tp1> operator auto_ptr_ref<_Tp1>() __STL_NOTHROW

{ return auto_ptr_ref<_Tp1>(this->release()); }

template <class _Tp1> operator auto_ptr<_Tp1>() __STL_NOTHROW

{ return auto_ptr<_Tp1>(this->release()); }

#endif /* auto ptr conversions && member templates */

};

__STL_END_NAMESPACE

#endif /* __SGI_STL_MEMORY */

// Local Variables:

// mode:C++

// End: