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00048 #ifndef BLOCXX_INTRUSIVE_REFERENCE_HPP_INCLUDE_GUARD_
00049 #define BLOCXX_INTRUSIVE_REFERENCE_HPP_INCLUDE_GUARD_
00050
00051 #include "blocxx/BLOCXX_config.h"
00052
00053 namespace BLOCXX_NAMESPACE
00054 {
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00072 template<class T> class IntrusiveReference
00073 {
00074 private:
00075 typedef IntrusiveReference this_type;
00076 public:
00077 typedef T element_type;
00078
00079 IntrusiveReference(): m_pObj(0)
00080 {
00081 }
00082 IntrusiveReference(T * p, bool add_ref = true): m_pObj(p)
00083 {
00084 if (m_pObj != 0 && add_ref) IntrusiveReferenceAddRef(m_pObj);
00085 }
00086 template<class U> IntrusiveReference(IntrusiveReference<U> const & rhs): m_pObj(rhs.getPtr())
00087 {
00088 if (m_pObj != 0) IntrusiveReferenceAddRef(m_pObj);
00089 }
00090 IntrusiveReference(IntrusiveReference const & rhs): m_pObj(rhs.m_pObj)
00091 {
00092 if (m_pObj != 0) IntrusiveReferenceAddRef(m_pObj);
00093 }
00094 ~IntrusiveReference()
00095 {
00096 if (m_pObj != 0) IntrusiveReferenceRelease(m_pObj);
00097 }
00098 template<class U> IntrusiveReference & operator=(IntrusiveReference<U> const & rhs)
00099 {
00100 this_type(rhs).swap(*this);
00101 return *this;
00102 }
00103 IntrusiveReference & operator=(IntrusiveReference const & rhs)
00104 {
00105 this_type(rhs).swap(*this);
00106 return *this;
00107 }
00108 IntrusiveReference & operator=(T * rhs)
00109 {
00110 this_type(rhs).swap(*this);
00111 return *this;
00112 }
00113 T * getPtr() const
00114 {
00115 return m_pObj;
00116 }
00117 T & operator*() const
00118 {
00119 return *m_pObj;
00120 }
00121 T * operator->() const
00122 {
00123 return m_pObj;
00124 }
00125 typedef T * this_type::*safe_bool;
00126 operator safe_bool() const
00127 {
00128 return m_pObj == 0? 0: &this_type::m_pObj;
00129 }
00130 bool operator! () const
00131 {
00132 return m_pObj == 0;
00133 }
00134
00135 void swap(IntrusiveReference & rhs)
00136 {
00137 T * tmp = m_pObj;
00138 m_pObj = rhs.m_pObj;
00139 rhs.m_pObj = tmp;
00140 }
00141
00142 template <class U>
00143 IntrusiveReference<U> cast_to() const
00144 {
00145 return IntrusiveReference<U>(dynamic_cast<U*>(m_pObj));
00146 }
00147
00148 private:
00149 T * m_pObj;
00150 };
00151 template<class T, class U> inline bool operator==(IntrusiveReference<T> const & a, IntrusiveReference<U> const & b)
00152 {
00153 return a.getPtr() == b.getPtr();
00154 }
00155 template<class T, class U> inline bool operator!=(IntrusiveReference<T> const & a, IntrusiveReference<U> const & b)
00156 {
00157 return a.getPtr() != b.getPtr();
00158 }
00159 template<class T> inline bool operator==(IntrusiveReference<T> const & a, T * b)
00160 {
00161 return a.getPtr() == b;
00162 }
00163 template<class T> inline bool operator!=(IntrusiveReference<T> const & a, T * b)
00164 {
00165 return a.getPtr() != b;
00166 }
00167 template<class T> inline bool operator==(T * a, IntrusiveReference<T> const & b)
00168 {
00169 return a == b.getPtr();
00170 }
00171 template<class T> inline bool operator!=(T * a, IntrusiveReference<T> const & b)
00172 {
00173 return a != b.getPtr();
00174 }
00175 #if __GNUC__ == 2 && __GNUC_MINOR__ <= 96
00176
00177 template<class T> inline bool operator!=(IntrusiveReference<T> const & a, IntrusiveReference<T> const & b)
00178 {
00179 return a.getPtr() != b.getPtr();
00180 }
00181 #endif
00182 template<class T> inline bool operator<(IntrusiveReference<T> const & a, IntrusiveReference<T> const & b)
00183 {
00184 return a.getPtr() < b.getPtr();
00185 }
00186 template<class T> void swap(IntrusiveReference<T> & lhs, IntrusiveReference<T> & rhs)
00187 {
00188 lhs.swap(rhs);
00189 }
00190 template<class T, class U> IntrusiveReference<T> static_pointer_cast(IntrusiveReference<U> const & p)
00191 {
00192 return static_cast<T *>(p.getPtr());
00193 }
00194 template<class T, class U> IntrusiveReference<T> const_pointer_cast(IntrusiveReference<U> const & p)
00195 {
00196 return const_cast<T *>(p.getPtr());
00197 }
00198 template<class T, class U> IntrusiveReference<T> dynamic_pointer_cast(IntrusiveReference<U> const & p)
00199 {
00200 return dynamic_cast<T *>(p.getPtr());
00201 }
00202
00203 }
00204
00205 #endif