ksharedptr.h
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00018 #ifndef KSharedPTR_H
00019 #define KSharedPTR_H
00020 
00039 class KShared {
00040 public:
00045    KShared() : count(0) { }
00046 
00051    KShared( const KShared & ) : count(0) { }
00052 
00056    KShared &operator=(const KShared & ) { return *this; }
00057 
00061    void _KShared_ref() const { count++; }
00062 
00067    void _KShared_unref() const { if (!--count) delete this; }
00068 
00074    int _KShared_count() const { return count; }
00075 
00076 protected:
00077    virtual ~KShared() { }
00078 private:
00079    mutable int count;
00080 };
00081 
00095 template< class T >
00096 struct KSharedPtr
00097 {
00098 public:
00102   KSharedPtr()
00103     : ptr(0) { }
00108   KSharedPtr( T* t )
00109     : ptr(t) { if ( ptr ) ptr->_KShared_ref(); }
00110 
00115   KSharedPtr( const KSharedPtr& p )
00116     : ptr(p.ptr) { if ( ptr ) ptr->_KShared_ref(); }
00117 
00122   ~KSharedPtr() { if ( ptr ) ptr->_KShared_unref(); }
00123 
00124   KSharedPtr<T>& operator= ( const KSharedPtr<T>& p ) {
00125     if ( ptr == p.ptr ) return *this;
00126     if ( ptr ) ptr->_KShared_unref();
00127     ptr = p.ptr;
00128     if ( ptr ) ptr->_KShared_ref();
00129     return *this;
00130   }
00131   KSharedPtr<T>& operator= ( T* p ) {
00132     if ( ptr == p ) return *this;
00133     if ( ptr ) ptr->_KShared_unref();
00134     ptr = p;
00135     if ( ptr ) ptr->_KShared_ref();
00136     return *this;
00137   }
00138   bool operator== ( const KSharedPtr<T>& p ) const { return ( ptr == p.ptr ); }
00139   bool operator!= ( const KSharedPtr<T>& p ) const { return ( ptr != p.ptr ); }
00140   bool operator== ( const T* p ) const { return ( ptr == p ); }
00141   bool operator!= ( const T* p ) const { return ( ptr != p ); }
00142   bool operator!() const { return ( ptr == 0 ); }
00143   operator T*() const { return ptr; }
00144 
00149   T* data() { return ptr; }
00150 
00155   const T* data() const { return ptr; }
00156 
00157   const T& operator*() const { return *ptr; }
00158   T& operator*() { return *ptr; }
00159   const T* operator->() const { return ptr; }
00160   T* operator->() { return ptr; }
00161 
00166   int count() const { return ptr->_KShared_count(); } 
00167 private:
00168   T* ptr;
00169 };
00170 
00171 #endif
 
This file is part of the documentation for kdecore Library Version 3.2.0.