autoptr.h
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00001 #ifndef AUTOPTR_H
00002 #define AUTOPTR_H
00003 #include <assert.h>
00004 
00005 namespace GMapping{
00006 
00007 template <class X>
00008 class autoptr{
00009         protected:
00010         
00011         public:
00012         struct reference{
00013                 X* data;
00014                 unsigned int shares;
00015         };
00016                 inline autoptr(X* p=(X*)(0));
00017                 inline autoptr(const autoptr<X>& ap);
00018                 inline autoptr& operator=(const autoptr<X>& ap);
00019                 inline ~autoptr();
00020                 inline operator int() const;
00021                 inline X& operator*();
00022                 inline const X& operator*() const;
00023                 //p     
00024                 reference * m_reference;
00025         protected:
00026 };
00027 
00028 template <class X>
00029 autoptr<X>::autoptr(X* p){
00030         m_reference=0;
00031         if (p){
00032                 m_reference=new reference;
00033                 m_reference->data=p;
00034                 m_reference->shares=1;
00035         }
00036 }
00037 
00038 template <class X>
00039 autoptr<X>::autoptr(const autoptr<X>& ap){
00040         m_reference=0;
00041         reference* ref=ap.m_reference;
00042         if (ap.m_reference){
00043                 m_reference=ref;
00044                 m_reference->shares++;
00045         }
00046 }
00047 
00048 template <class X>
00049 autoptr<X>& autoptr<X>::operator=(const autoptr<X>& ap){
00050         reference* ref=ap.m_reference;
00051         if (m_reference==ref){
00052                 return *this;
00053         }
00054         if (m_reference && !(--m_reference->shares)){
00055                 delete m_reference->data;
00056                 delete m_reference;
00057                 m_reference=0;
00058         }       
00059         if (ref){
00060                 m_reference=ref;
00061                 m_reference->shares++;
00062         } 
00063 //20050802 nasty changes begin
00064         else
00065                 m_reference=0;
00066 //20050802 nasty changes end
00067         return *this;
00068 }
00069 
00070 template <class X>
00071 autoptr<X>::~autoptr(){
00072         if (m_reference && !(--m_reference->shares)){
00073                 delete m_reference->data;
00074                 delete m_reference;
00075                 m_reference=0;
00076         }       
00077 }
00078 
00079 template <class X>
00080 autoptr<X>::operator int() const{
00081         return m_reference && m_reference->shares && m_reference->data;
00082 }
00083 
00084 template <class X>
00085 X& autoptr<X>::operator*(){
00086         assert(m_reference && m_reference->shares && m_reference->data);
00087         return *(m_reference->data);
00088 }
00089 
00090 template <class X>
00091 const X& autoptr<X>::operator*() const{
00092         assert(m_reference && m_reference->shares && m_reference->data);
00093         return *(m_reference->data);
00094 }
00095 
00096 };
00097 #endif


openslam_gmapping
Author(s): Giorgio Grisetti, Cyrill Stachniss, Wolfram Burgard
autogenerated on Thu Jun 6 2019 19:25:12