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38 | ****************************************************************************/ |
39 | #ifndef PASSREFPTR_H |
40 | #define PASSREFPTR_H |
41 | |
42 | template <typename T> class RefPtr; |
43 | |
44 | template <typename T> |
45 | class PassRefPtr { |
46 | public: |
47 | PassRefPtr() : m_ptr(0) {} |
48 | |
49 | PassRefPtr(T* ptr) |
50 | : m_ptr(ptr) |
51 | { |
52 | if (m_ptr) |
53 | m_ptr->ref(); |
54 | } |
55 | |
56 | PassRefPtr(const PassRefPtr<T>& other) |
57 | : m_ptr(other.leakRef()) |
58 | { |
59 | } |
60 | |
61 | PassRefPtr(const RefPtr<T>& other) |
62 | : m_ptr(other.get()) |
63 | { |
64 | if (m_ptr) |
65 | m_ptr->ref(); |
66 | } |
67 | |
68 | ~PassRefPtr() |
69 | { |
70 | if (m_ptr) |
71 | m_ptr->deref(); |
72 | } |
73 | |
74 | T* operator->() const { return m_ptr; } |
75 | |
76 | T* leakRef() const |
77 | { |
78 | T* result = m_ptr; |
79 | m_ptr = 0; |
80 | return result; |
81 | } |
82 | |
83 | private: |
84 | PassRefPtr<T>& operator=(const PassRefPtr<T>& t); |
85 | |
86 | protected: |
87 | mutable T* m_ptr; |
88 | }; |
89 | |
90 | template <typename T> |
91 | class Ref : public PassRefPtr<T> |
92 | { |
93 | using PassRefPtr<T>::PassRefPtr; |
94 | |
95 | template <typename PtrType> friend Ref<PtrType> adoptRef(PtrType*); |
96 | }; |
97 | |
98 | template <typename T> |
99 | Ref<T> adoptRef(T* ptr) |
100 | { |
101 | Ref<T> result; |
102 | result.m_ptr = ptr; |
103 | return result; |
104 | } |
105 | |
106 | #endif // PASSREFPTR_H |
107 | |