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39#ifndef PASSREFPTR_H
40#define PASSREFPTR_H
41
42template <typename T> class RefPtr;
43
44template <typename T>
45class PassRefPtr {
46public:
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
83private:
84 PassRefPtr<T>& operator=(const PassRefPtr<T>& t);
85
86protected:
87 mutable T* m_ptr;
88};
89
90template <typename T>
91class Ref : public PassRefPtr<T>
92{
93 using PassRefPtr<T>::PassRefPtr;
94
95 template <typename PtrType> friend Ref<PtrType> adoptRef(PtrType*);
96};
97
98template <typename T>
99Ref<T> adoptRef(T* ptr)
100{
101 Ref<T> result;
102 result.m_ptr = ptr;
103 return result;
104}
105
106#endif // PASSREFPTR_H
107

source code of qtdeclarative/src/3rdparty/masm/stubs/wtf/PassRefPtr.h