ksharedptr.h00001
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00018 #ifndef KSharedPTR_H
00019 #define KSharedPTR_H
00020
00021 #include "kdelibs_export.h"
00022
00040 class KDECORE_EXPORT KShared {
00041 public:
00046 KShared() : count(0) { }
00047
00052 KShared( const KShared & ) : count(0) { }
00053
00057 KShared &operator=(const KShared & ) { return *this; }
00058
00062 void _KShared_ref() const { count++; }
00063
00068 void _KShared_unref() const { if (!--count) delete this; }
00069
00075 int _KShared_count() const { return count; }
00076
00077 protected:
00078 virtual ~KShared() { }
00079 private:
00080 mutable int count;
00081 };
00082
00099 template< class T >
00100 class KSharedPtr
00101 {
00102 public:
00106 KSharedPtr()
00107 : ptr(0) { }
00112 KSharedPtr( T* t )
00113 : ptr(t) { if ( ptr ) ptr->_KShared_ref(); }
00114
00119 KSharedPtr( const KSharedPtr& p )
00120 : ptr(p.ptr) { if ( ptr ) ptr->_KShared_ref(); }
00121
00126 ~KSharedPtr() { if ( ptr ) ptr->_KShared_unref(); }
00127
00128 KSharedPtr<T>& operator= ( const KSharedPtr<T>& p ) {
00129 if ( ptr == p.ptr ) return *this;
00130 if ( ptr ) ptr->_KShared_unref();
00131 ptr = p.ptr;
00132 if ( ptr ) ptr->_KShared_ref();
00133 return *this;
00134 }
00135 KSharedPtr<T>& operator= ( T* p ) {
00136 if ( ptr == p ) return *this;
00137 if ( ptr ) ptr->_KShared_unref();
00138 ptr = p;
00139 if ( ptr ) ptr->_KShared_ref();
00140 return *this;
00141 }
00142 bool operator== ( const KSharedPtr<T>& p ) const { return ( ptr == p.ptr ); }
00143 bool operator!= ( const KSharedPtr<T>& p ) const { return ( ptr != p.ptr ); }
00144 bool operator== ( const T* p ) const { return ( ptr == p ); }
00145 bool operator!= ( const T* p ) const { return ( ptr != p ); }
00146 bool operator!() const { return ( ptr == 0 ); }
00147 operator T*() const { return ptr; }
00148
00153 T* data() { return ptr; }
00154
00159 const T* data() const { return ptr; }
00160
00161 const T& operator*() const { return *ptr; }
00162 T& operator*() { return *ptr; }
00163 const T* operator->() const { return ptr; }
00164 T* operator->() { return ptr; }
00165
00170 int count() const { return ptr->_KShared_count(); }
00171 private:
00172 T* ptr;
00173 };
00174
00175 #endif
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