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1 /* | 1 /* |
2 * Copyright (C) 2014 Google Inc. All rights reserved. | 2 * Copyright (C) 2014 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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37 // interface (get, clear) of other pointer types such as RefPtr, | 37 // interface (get, clear) of other pointer types such as RefPtr, |
38 // Persistent and Member. This is used for the Blink garbage | 38 // Persistent and Member. This is used for the Blink garbage |
39 // collection work in order to be able to write shared code that will | 39 // collection work in order to be able to write shared code that will |
40 // use reference counting or garbage collection based on a | 40 // use reference counting or garbage collection based on a |
41 // compile-time flag. | 41 // compile-time flag. |
42 | 42 |
43 namespace WTF { | 43 namespace WTF { |
44 | 44 |
45 template<typename T> | 45 template<typename T> |
46 class RawPtr { | 46 class RawPtr { |
| 47 WTF_DISALLOW_CONSTRUCTION_FROM_ZERO(RawPtr); |
| 48 WTF_DISALLOW_ZERO_ASSIGNMENT(RawPtr); |
47 public: | 49 public: |
48 RawPtr() : m_ptr(0) { } | 50 RawPtr() : m_ptr(0) { } |
| 51 RawPtr(std::nullptr_t) : m_ptr(0) { } |
49 RawPtr(T* ptr) : m_ptr(ptr) { } | 52 RawPtr(T* ptr) : m_ptr(ptr) { } |
50 RawPtr(const RawPtr& other) | 53 RawPtr(const RawPtr& other) |
51 : m_ptr(other.get()) | 54 : m_ptr(other.get()) |
52 { | 55 { |
53 } | 56 } |
54 template<typename U> | 57 template<typename U> |
55 RawPtr(const RawPtr<U>& other) | 58 RawPtr(const RawPtr<U>& other) |
56 : m_ptr(other.get()) | 59 : m_ptr(other.get()) |
57 { | 60 { |
58 } | 61 } |
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80 return *this; | 83 return *this; |
81 } | 84 } |
82 | 85 |
83 template<typename U> | 86 template<typename U> |
84 RawPtr& operator=(RawPtr<U> ptr) | 87 RawPtr& operator=(RawPtr<U> ptr) |
85 { | 88 { |
86 m_ptr = ptr.get(); | 89 m_ptr = ptr.get(); |
87 return *this; | 90 return *this; |
88 } | 91 } |
89 | 92 |
| 93 RawPtr& operator=(std::nullptr_t) |
| 94 { |
| 95 m_ptr = 0; |
| 96 return *this; |
| 97 } |
| 98 |
90 operator T*() const { return m_ptr; } | 99 operator T*() const { return m_ptr; } |
91 T& operator*() const { return *m_ptr; } | 100 T& operator*() const { return *m_ptr; } |
92 T* operator->() const { return m_ptr; } | 101 T* operator->() const { return m_ptr; } |
93 | 102 |
94 void swap(RawPtr& o) | 103 void swap(RawPtr& o) |
95 { | 104 { |
96 std::swap(m_ptr, o.m_ptr); | 105 std::swap(m_ptr, o.m_ptr); |
97 } | 106 } |
98 | 107 |
99 | 108 |
100 private: | 109 private: |
101 T* m_ptr; | 110 T* m_ptr; |
102 }; | 111 }; |
103 | 112 |
104 template<typename T, typename U> inline RawPtr<T> static_pointer_cast(const RawP
tr<U>& p) | 113 template<typename T, typename U> inline RawPtr<T> static_pointer_cast(const RawP
tr<U>& p) |
105 { | 114 { |
106 return RawPtr<T>(static_cast<T*>(p.get())); | 115 return RawPtr<T>(static_cast<T*>(p.get())); |
107 } | 116 } |
108 | 117 |
109 } // namespace WTF | 118 } // namespace WTF |
110 | 119 |
111 using WTF::RawPtr; | 120 using WTF::RawPtr; |
112 | 121 |
113 #endif | 122 #endif |
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