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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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112 // handle scope and a new one is created, all allocations will take | 112 // handle scope and a new one is created, all allocations will take |
113 // place in the new handle scope until it is deleted. After that, | 113 // place in the new handle scope until it is deleted. After that, |
114 // new handles will again be allocated in the original handle scope. | 114 // new handles will again be allocated in the original handle scope. |
115 // | 115 // |
116 // After the handle scope of a local handle has been deleted the | 116 // After the handle scope of a local handle has been deleted the |
117 // garbage collector will no longer track the object stored in the | 117 // garbage collector will no longer track the object stored in the |
118 // handle and may deallocate it. The behavior of accessing a handle | 118 // handle and may deallocate it. The behavior of accessing a handle |
119 // for which the handle scope has been deleted is undefined. | 119 // for which the handle scope has been deleted is undefined. |
120 class HandleScope { | 120 class HandleScope { |
121 public: | 121 public: |
122 inline HandleScope(); | |
123 explicit inline HandleScope(Isolate* isolate); | 122 explicit inline HandleScope(Isolate* isolate); |
124 | 123 |
125 inline ~HandleScope(); | 124 inline ~HandleScope(); |
126 | 125 |
127 // Counts the number of allocated handles. | 126 // Counts the number of allocated handles. |
128 static int NumberOfHandles(); | 127 static int NumberOfHandles(); |
129 | 128 |
130 // Creates a new handle with the given value. | 129 // Creates a new handle with the given value. |
131 template <typename T> | 130 template <typename T> |
132 static inline T** CreateHandle(T* value, Isolate* isolate); | 131 static inline T** CreateHandle(T* value, Isolate* isolate); |
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362 inline AllowHandleDereference(); | 361 inline AllowHandleDereference(); |
363 inline ~AllowHandleDereference(); | 362 inline ~AllowHandleDereference(); |
364 private: | 363 private: |
365 bool old_state_; | 364 bool old_state_; |
366 #endif | 365 #endif |
367 }; | 366 }; |
368 | 367 |
369 } } // namespace v8::internal | 368 } } // namespace v8::internal |
370 | 369 |
371 #endif // V8_HANDLES_H_ | 370 #endif // V8_HANDLES_H_ |
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