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37 #include "wtf/HashTableDeletedValueType.h"
39 // RawPtr is a simple wrapper for a raw pointer that provides the
40 // interface (get, clear) of other pointer types such as RefPtr,
41 // Persistent and Member. This is used for the Blink garbage
42 // collection work in order to be able to write shared code that will
43 // use reference counting or garbage collection based on a
54 m_ptr = reinterpret_cast<T*>(rawPtrZapValue);
57 RawPtr(std::nullptr_t) : m_ptr(0) { }
58 RawPtr(T* ptr) : m_ptr(ptr) { }
59 explicit RawPtr(T& reference) : m_ptr(&reference) { }
60 RawPtr(const RawPtr& other)
66 RawPtr(const RawPtr<U>& other)
71 // Hash table deleted values, which are only constructed and never copied or destroyed.
72 RawPtr(HashTableDeletedValueType) : m_ptr(hashTableDeletedValue()) { }
73 bool isHashTableDeletedValue() const { return m_ptr == hashTableDeletedValue(); }
75 T* get() const { return m_ptr; }
76 void clear() { m_ptr = 0; }
77 // FIXME: oilpan: Remove release and leakRef once we remove RefPtrWillBeRawPtr.
80 RawPtr<T> tmp = m_ptr;
98 RawPtr& operator=(U* ptr)
105 RawPtr& operator=(RawPtr<U> ptr)
111 RawPtr& operator=(std::nullptr_t)
117 operator T*() const { return m_ptr; }
118 T& operator*() const { return *m_ptr; }
119 T* operator->() const { return m_ptr; }
120 bool operator!() const { return !m_ptr; }
124 std::swap(m_ptr, o.m_ptr);
127 static T* hashTableDeletedValue() { return reinterpret_cast<T*>(-1); }
130 static const uintptr_t rawPtrZapValue = 0x3a3a3a3a;
134 template<typename T, typename U> inline RawPtr<T> static_pointer_cast(const RawPtr<U>& p)
136 return RawPtr<T>(static_cast<T*>(p.get()));
139 template<typename T> inline T* getPtr(const RawPtr<T>& p)