103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file weakPointerTo.h
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* @author drose
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* @date 2004-09-27
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*/
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#ifndef WEAKPOINTERTO_H
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#define WEAKPOINTERTO_H
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#include "pandabase.h"
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#include "weakPointerToBase.h"
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#include "pointerTo.h"
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/**
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* WeakPointerTo is similar to PointerTo, except that it does not actually
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* prevent the referenced pointer from deleting. Instead, the referenced
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* pointer is allowed to delete, but if this happens then was_deleted() will
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* return true, and it will be an assertion error to dereference the pointer
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* thereafter.
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*/
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template <class T>
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class WeakPointerTo : public WeakPointerToBase<T> {
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public:
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typedef TYPENAME WeakPointerToBase<T>::To To;
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PUBLISHED:
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INLINE WeakPointerTo(To *ptr = (To *)NULL);
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INLINE WeakPointerTo(const PointerTo<T> ©);
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INLINE WeakPointerTo(const WeakPointerTo<T> ©);
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public:
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INLINE To &operator *() const;
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INLINE To *operator -> () const;
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// MSVC.NET 2005 insists that we use T *, and not To *, here.
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INLINE operator T *() const;
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PUBLISHED:
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INLINE To *p() const;
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INLINE To *get_orig() const;
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INLINE WeakPointerTo<T> &operator = (To *ptr);
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INLINE WeakPointerTo<T> &operator = (const PointerTo<T> ©);
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INLINE WeakPointerTo<T> &operator = (const WeakPointerTo<T> ©);
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// This function normally wouldn't need to be redefined here, but we do so
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// anyway just to help out interrogate (which doesn't seem to want to
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// automatically export the WeakPointerToBase class). When this works again
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// in interrogate, we can remove this.
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INLINE void clear() { WeakPointerToBase<T>::clear(); }
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};
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/**
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* A WeakConstPointerTo is similar to a WeakPointerTo, except it keeps a const
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* pointer to the thing, that will be cleared to NULL when the thing deleted.
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*/
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template <class T>
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class WeakConstPointerTo : public WeakPointerToBase<T> {
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public:
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typedef TYPENAME WeakPointerToBase<T>::To To;
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PUBLISHED:
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INLINE WeakConstPointerTo(const To *ptr = (const To *)NULL);
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INLINE WeakConstPointerTo(const PointerTo<T> ©);
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INLINE WeakConstPointerTo(const ConstPointerTo<T> ©);
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INLINE WeakConstPointerTo(const WeakPointerTo<T> ©);
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INLINE WeakConstPointerTo(const WeakConstPointerTo<T> ©);
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public:
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INLINE const To &operator *() const;
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INLINE const To *operator -> () const;
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INLINE operator const T *() const;
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PUBLISHED:
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INLINE const To *p() const;
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INLINE const To *get_orig() const;
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INLINE WeakConstPointerTo<T> &operator = (const To *ptr);
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INLINE WeakConstPointerTo<T> &operator = (const PointerTo<T> ©);
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INLINE WeakConstPointerTo<T> &operator = (const ConstPointerTo<T> ©);
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INLINE WeakConstPointerTo<T> &operator = (const WeakPointerTo<T> ©);
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INLINE WeakConstPointerTo<T> &operator = (const WeakConstPointerTo<T> ©);
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// These functions normally wouldn't need to be redefined here, but we do so
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// anyway just to help out interrogate (which doesn't seem to want to
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// automatically export the WeakPointerToBase class). When this works again
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// in interrogate, we can remove these.
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INLINE bool is_null() const { return WeakPointerToBase<T>::is_null(); }
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INLINE void clear() { WeakPointerToBase<T>::clear(); }
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};
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#define WPT(type) WeakPointerTo< type >
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#define WCPT(type) WeakConstPointerTo< type >
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#include "weakPointerTo.I"
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#endif
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