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39 | #ifndef REFPTR_H |
40 | #define REFPTR_H |
41 | |
42 | #include "PassRefPtr.h" |
43 | |
44 | template <typename T> |
45 | class RefPtr { |
46 | public: |
47 | RefPtr() : m_ptr(0) {} |
48 | RefPtr(const RefPtr<T> &other) |
49 | : m_ptr(other.m_ptr) |
50 | { |
51 | if (m_ptr) |
52 | m_ptr->ref(); |
53 | } |
54 | |
55 | RefPtr<T>& operator=(const RefPtr<T>& other) |
56 | { |
57 | if (other.m_ptr) |
58 | other.m_ptr->ref(); |
59 | if (m_ptr) |
60 | m_ptr->deref(); |
61 | m_ptr = other.m_ptr; |
62 | return *this; |
63 | } |
64 | |
65 | RefPtr(const PassRefPtr<T>& other) |
66 | : m_ptr(other.leakRef()) |
67 | { |
68 | } |
69 | |
70 | ~RefPtr() |
71 | { |
72 | if (m_ptr) |
73 | m_ptr->deref(); |
74 | } |
75 | |
76 | T* operator->() const { return m_ptr; } |
77 | T* get() const { return m_ptr; } |
78 | bool operator!() const { return !m_ptr; } |
79 | |
80 | PassRefPtr<T> release() |
81 | { |
82 | T* ptr = m_ptr; |
83 | m_ptr = 0; |
84 | return adoptRef(ptr); |
85 | } |
86 | |
87 | private: |
88 | T* m_ptr; |
89 | }; |
90 | |
91 | #endif // REFPTR_H |
92 | |