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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_SMART_POINTERS_H_ | 5 #ifndef V8_SMART_POINTERS_H_ |
6 #define V8_SMART_POINTERS_H_ | 6 #define V8_SMART_POINTERS_H_ |
7 | 7 |
8 namespace v8 { | 8 namespace v8 { |
9 namespace internal { | 9 namespace internal { |
10 | 10 |
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49 // If you want to take out the plain pointer and don't want it automatically | 49 // If you want to take out the plain pointer and don't want it automatically |
50 // deleted then call Detach(). Afterwards, the smart pointer is empty | 50 // deleted then call Detach(). Afterwards, the smart pointer is empty |
51 // (NULL). | 51 // (NULL). |
52 T* Detach() { | 52 T* Detach() { |
53 T* temp = p_; | 53 T* temp = p_; |
54 p_ = NULL; | 54 p_ = NULL; |
55 return temp; | 55 return temp; |
56 } | 56 } |
57 | 57 |
58 void Reset(T* new_value) { | 58 void Reset(T* new_value) { |
59 ASSERT(p_ == NULL || p_ != new_value); | 59 DCHECK(p_ == NULL || p_ != new_value); |
60 if (p_) Deallocator::Delete(p_); | 60 if (p_) Deallocator::Delete(p_); |
61 p_ = new_value; | 61 p_ = new_value; |
62 } | 62 } |
63 | 63 |
64 // Assignment requires an empty (NULL) SmartArrayPointer as the receiver. Like | 64 // Assignment requires an empty (NULL) SmartArrayPointer as the receiver. Like |
65 // the copy constructor it removes the pointer in the original to avoid | 65 // the copy constructor it removes the pointer in the original to avoid |
66 // double freeing. | 66 // double freeing. |
67 SmartPointerBase<Deallocator, T>& operator=( | 67 SmartPointerBase<Deallocator, T>& operator=( |
68 const SmartPointerBase<Deallocator, T>& rhs) { | 68 const SmartPointerBase<Deallocator, T>& rhs) { |
69 ASSERT(is_empty()); | 69 DCHECK(is_empty()); |
70 T* tmp = rhs.p_; // swap to handle self-assignment | 70 T* tmp = rhs.p_; // swap to handle self-assignment |
71 const_cast<SmartPointerBase<Deallocator, T>&>(rhs).p_ = NULL; | 71 const_cast<SmartPointerBase<Deallocator, T>&>(rhs).p_ = NULL; |
72 p_ = tmp; | 72 p_ = tmp; |
73 return *this; | 73 return *this; |
74 } | 74 } |
75 | 75 |
76 bool is_empty() const { return p_ == NULL; } | 76 bool is_empty() const { return p_ == NULL; } |
77 | 77 |
78 protected: | 78 protected: |
79 // When the destructor of the scoped pointer is executed the plain pointer | 79 // When the destructor of the scoped pointer is executed the plain pointer |
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121 SmartPointer() { } | 121 SmartPointer() { } |
122 explicit SmartPointer(T* ptr) | 122 explicit SmartPointer(T* ptr) |
123 : SmartPointerBase<ObjectDeallocator<T>, T>(ptr) { } | 123 : SmartPointerBase<ObjectDeallocator<T>, T>(ptr) { } |
124 SmartPointer(const SmartPointer<T>& rhs) | 124 SmartPointer(const SmartPointer<T>& rhs) |
125 : SmartPointerBase<ObjectDeallocator<T>, T>(rhs) { } | 125 : SmartPointerBase<ObjectDeallocator<T>, T>(rhs) { } |
126 }; | 126 }; |
127 | 127 |
128 } } // namespace v8::internal | 128 } } // namespace v8::internal |
129 | 129 |
130 #endif // V8_SMART_POINTERS_H_ | 130 #endif // V8_SMART_POINTERS_H_ |
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