135 lines
3.4 KiB
Plaintext
135 lines
3.4 KiB
Plaintext
/*
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* Copyright (c) 1997-1999
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*/
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#ifndef __SGI_STL_MEMORY
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#define __SGI_STL_MEMORY
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#include <stl_algobase.h>
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#include <stl_alloc.h>
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#include <stl_construct.h>
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#include <stl_tempbuf.h>
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#include <stl_uninitialized.h>
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#include <stl_raw_storage_iter.h>
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__STL_BEGIN_NAMESPACE
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#if defined(__SGI_STL_USE_AUTO_PTR_CONVERSIONS) && \
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defined(__STL_MEMBER_TEMPLATES)
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template<class _Tp1> struct auto_ptr_ref {
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_Tp1* _M_ptr;
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auto_ptr_ref(_Tp1* __p) : _M_ptr(__p) {}
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};
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#endif
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template <class _Tp> class auto_ptr {
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private:
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_Tp* _M_ptr;
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public:
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typedef _Tp element_type;
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explicit auto_ptr(_Tp* __p = 0) __STL_NOTHROW : _M_ptr(__p) {}
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auto_ptr(auto_ptr& __a) __STL_NOTHROW : _M_ptr(__a.release()) {}
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#ifdef __STL_MEMBER_TEMPLATES
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template <class _Tp1> auto_ptr(auto_ptr<_Tp1>& __a) __STL_NOTHROW
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: _M_ptr(__a.release()) {}
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#endif /* __STL_MEMBER_TEMPLATES */
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auto_ptr& operator=(auto_ptr& __a) __STL_NOTHROW {
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if (&__a != this) {
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delete _M_ptr;
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_M_ptr = __a.release();
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}
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return *this;
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}
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#ifdef __STL_MEMBER_TEMPLATES
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template <class _Tp1>
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auto_ptr& operator=(auto_ptr<_Tp1>& __a) __STL_NOTHROW {
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if (__a.get() != this->get()) {
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delete _M_ptr;
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_M_ptr = __a.release();
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}
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return *this;
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}
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#endif /* __STL_MEMBER_TEMPLATES */
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// Note: The C++ standard says there is supposed to be an empty throw
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// specification here, but omitting it is standard conforming. Its
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// presence can be detected only if _Tp::~_Tp() throws, but (17.4.3.6/2)
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// this is prohibited.
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~auto_ptr() { delete _M_ptr; }
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_Tp& operator*() const __STL_NOTHROW {
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return *_M_ptr;
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}
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_Tp* operator->() const __STL_NOTHROW {
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return _M_ptr;
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}
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_Tp* get() const __STL_NOTHROW {
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return _M_ptr;
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}
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_Tp* release() __STL_NOTHROW {
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_Tp* __tmp = _M_ptr;
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_M_ptr = 0;
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return __tmp;
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}
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void reset(_Tp* __p = 0) __STL_NOTHROW {
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if (__p != _M_ptr) {
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delete _M_ptr;
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_M_ptr = __p;
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}
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}
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// According to the C++ standard, these conversions are required. Most
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// present-day compilers, however, do not enforce that requirement---and,
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// in fact, most present-day compilers do not support the language
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// features that these conversions rely on.
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#if defined(__SGI_STL_USE_AUTO_PTR_CONVERSIONS) && \
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defined(__STL_MEMBER_TEMPLATES)
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public:
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auto_ptr(auto_ptr_ref<_Tp> __ref) __STL_NOTHROW
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: _M_ptr(__ref._M_ptr) {}
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auto_ptr& operator=(auto_ptr_ref<_Tp> __ref) __STL_NOTHROW {
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if (__ref._M_ptr != this->get()) {
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delete _M_ptr;
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_M_ptr = __ref._M_ptr;
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}
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return *this;
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}
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template <class _Tp1> operator auto_ptr_ref<_Tp1>() __STL_NOTHROW
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{ return auto_ptr_ref<_Tp1>(this->release()); }
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template <class _Tp1> operator auto_ptr<_Tp1>() __STL_NOTHROW
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{ return auto_ptr<_Tp1>(this->release()); }
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#endif /* auto ptr conversions && member templates */
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};
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__STL_END_NAMESPACE
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#endif /* __SGI_STL_MEMORY */
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// Local Variables:
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// mode:C++
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// End:
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