UCommon
pointer.h
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41 
47 #ifndef COMMONCPP_POINTER_H_
48 #define COMMONCPP_POINTER_H_
49 
50 #ifndef COMMONCPP_CONFIG_H_
51 #include <commoncpp/config.h>
52 #endif
53 
54 namespace ost {
55 
62 template <class T>
63 class Pointer
64 {
65 protected:
66  unsigned *ptrCount;
67  T *ptrObject;
68 
69  inline void ptrDetach(void) {
70  if(ptrCount && --(*ptrCount)==0) {
71  delete ptrObject;
72  delete ptrCount;
73  }
74  ptrObject = NULL;
75  ptrCount = NULL;
76  }
77 
78 public:
79  inline explicit Pointer(T* ptr = NULL) : ptrObject(ptr) {
80  ptrCount = new unsigned;
81  *ptrCount = 1;
82  }
83 
84  inline Pointer(const Pointer<T> &ref) {
85  ptrObject = ref.ptrObject;
86  ptrCount = ref.ptrCount;
87  ++(*ptrCount);
88  }
89 
90  inline virtual ~Pointer() {
91  ptrDetach();
92  }
93 
94  inline Pointer& operator=(const Pointer<T> &ref) {
95  if(this != &ref) {
96  ptrDetach();
97  ptrObject = ref.ptrObject;
98  ptrCount = ref.ptrCount;
99  ++(*ptrCount);
100  }
101  return *this;
102  }
103 
104  inline T& operator*() const {
105  return *ptrObject;
106  }
107 
108  inline T* getObject() const {
109  return ptrObject;
110  }
111 
112  inline T* operator->() const {
113  return ptrObject;
114  }
115 
116  inline operator bool() const {
117  return (*ptrCount != 1);
118  }
119 
120  inline bool operator!() const {
121  return (*ptrCount == 1);
122  }
123 
124  inline int operator++() const {
125  return ++(*ptrCount);
126  }
127 
128  inline int operator--() const {
129  if(*ptrCount == 1) {
130  delete this;
131  return 0;
132  }
133  return --(*ptrCount);
134  }
135 };
136 
137 } // namespace ost
138 
139 #endif
Used to create and manage referece counted pointers.
Definition: pointer.h:63