77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/cocoa/ObjcRef.h
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// Purpose: wxObjcAutoRef template class
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// Author: David Elliott
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// Modified by:
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// Created: 2004/03/28
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// RCS-ID: $Id$
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// Copyright: (c) 2004 David Elliott <dfe@cox.net>
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/*
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wxObjcAutoRefFromAlloc: construct a reference to an object that was
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[NSObject -alloc]'ed and thus does not need a retain
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wxObjcAutoRef: construct a reference to an object that was
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either autoreleased or is retained by something else.
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*/
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struct objc_object;
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// We must do any calls to Objective-C from an Objective-C++ source file
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class wxObjcAutoRefBase
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{
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protected:
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static struct objc_object* ObjcRetain(struct objc_object*);
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static struct objc_object* ObjcRelease(struct objc_object*);
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};
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// T should be a pointer like NSObject*
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template <class T>
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class wxObjcAutoRefFromAlloc: wxObjcAutoRefBase
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{
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public:
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wxObjcAutoRefFromAlloc(T p = 0)
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: m_ptr(p)
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// NOTE: this is from alloc. Do NOT retain
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{}
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wxObjcAutoRefFromAlloc(const wxObjcAutoRefFromAlloc& otherRef)
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: m_ptr(otherRef.m_ptr)
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{ ObjcRetain(m_ptr); }
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~wxObjcAutoRefFromAlloc()
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{ ObjcRelease(m_ptr); }
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wxObjcAutoRefFromAlloc& operator=(const wxObjcAutoRefFromAlloc& otherRef)
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{ ObjcRetain(otherRef.m_ptr);
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ObjcRelease(m_ptr);
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m_ptr = otherRef.m_ptr;
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return *this;
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}
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operator T() const
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{ return m_ptr; }
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T operator->() const
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{ return m_ptr; }
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protected:
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T m_ptr;
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};
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// The only thing wxObjcAutoRef has to do is retain an initial object
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template <class T>
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class wxObjcAutoRef: public wxObjcAutoRefFromAlloc<T>
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{
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public:
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wxObjcAutoRef(T p = 0)
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: wxObjcAutoRefFromAlloc<T>(p)
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{ ObjcRetain(m_ptr); }
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~wxObjcAutoRef() {}
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wxObjcAutoRef(const wxObjcAutoRef& otherRef)
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: wxObjcAutoRefFromAlloc<T>(otherRef)
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{}
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wxObjcAutoRef(const wxObjcAutoRefFromAlloc<T>& otherRef)
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: wxObjcAutoRefFromAlloc<T>(otherRef)
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{}
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wxObjcAutoRef& operator=(const wxObjcAutoRef& otherRef)
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{ return wxObjcAutoRefFromAlloc<T>::operator=(otherRef); }
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};
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