/*
* 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>
// 提供数据空间分配的方法，含一级分配器 malloc_alloc
// 二级分配器 alloc
// 适配器 simple_alloc
// PS: 二级分配器在 __USE_MALLOC 未打开的情况下，直接 typedef malloc_alloc alloc;
#include <stl_alloc.h>
// 提供对象构建，打散的方法 _Construct, _Destroy
#include <stl_construct.h>
#include <stl_tempbuf.h>
// 对内存块的批量操作复制、填充对象
// uninitialized_copy(),uninitialized_fill(),uninitialized_fill_n()
#include <stl_uninitialized.h>
#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: