GNU CommonC++
pointer.h
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41
47#ifndef CCXX_POINTER_H_
48#define CCXX_POINTER_H_
49
50#ifndef CCXX_MISSING_H_
51#include <cc++/missing.h>
52#endif
53
54#ifdef CCXX_NAMESPACES
55namespace ost {
56#endif
57
64template <class T>
66{
67protected:
68 unsigned *ptrCount;
70
71 void ptrDetach(void)
72 {
73 if(ptrCount && --(*ptrCount)==0) {
74 delete ptrObject;
75 delete ptrCount;
76 }
77 ptrObject = NULL;
78 ptrCount = NULL;
79 }
80
81public:
82 explicit Pointer(T* ptr = NULL) : ptrObject(ptr)
83 {
84 ptrCount = new unsigned;
85 *ptrCount = 1;
86 }
87
88 Pointer(const Pointer<T> &ref)
89 {
90 ptrObject = ref.ptrObject;
91 ptrCount = ref.ptrCount;
92 ++(*ptrCount);
93 }
94
95 inline virtual ~Pointer()
96 {ptrDetach();}
97
98
100 {
101 if(this != &ref) {
102 ptrDetach();
103 ptrObject = ref.ptrObject;
104 ptrCount = ref.ptrCount;
105 ++(*ptrCount);
106 }
107 return *this;
108 }
109
110 inline T& operator*() const
111 {return *ptrObject;};
112
113 inline T* getObject() const
114 {return ptrObject;};
115
116 inline T* operator->() const
117 {return ptrObject;};
118
119 inline bool operator!() const
120 {return (*ptrCount == 1);};
121
122 inline int operator++() const
123 {return ++(*ptrCount);};
124
125 int operator--() const
126 {
127 if(*ptrCount == 1) {
128 delete this;
129 return 0;
130 }
131 return --(*ptrCount);
132 }
133};
134
135#ifdef CCXX_NAMESPACES
136}
137#endif
138
139#endif
Used to create and manage referece counted pointers.
Definition pointer.h:66
void ptrDetach(void)
Definition pointer.h:71
int operator--() const
Definition pointer.h:125
Pointer & operator=(const Pointer< T > &ref)
Definition pointer.h:99
virtual ~Pointer()
Definition pointer.h:95
T * ptrObject
Definition pointer.h:69
T * getObject() const
Definition pointer.h:113
int operator++() const
Definition pointer.h:122
T & operator*() const
Definition pointer.h:110
T * operator->() const
Definition pointer.h:116
Pointer(T *ptr=NULL)
Definition pointer.h:82
unsigned * ptrCount
Definition pointer.h:68
Pointer(const Pointer< T > &ref)
Definition pointer.h:88
bool operator!() const
Definition pointer.h:119
substitute functions which may be missing in target platform libc.
Definition address.h:64