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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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78 } | 78 } |
79 | 79 |
80 static Handle<T> null() { return Handle<T>(); } | 80 static Handle<T> null() { return Handle<T>(); } |
81 bool is_null() const { return location_ == NULL; } | 81 bool is_null() const { return location_ == NULL; } |
82 | 82 |
83 // Closes the given scope, but lets this handle escape. See | 83 // Closes the given scope, but lets this handle escape. See |
84 // implementation in api.h. | 84 // implementation in api.h. |
85 inline Handle<T> EscapeFrom(v8::HandleScope* scope); | 85 inline Handle<T> EscapeFrom(v8::HandleScope* scope); |
86 | 86 |
87 #ifdef DEBUG | 87 #ifdef DEBUG |
88 bool IsDereferenceAllowed(bool explicitly_allow_deferred) const; | 88 enum DereferenceCheckMode { INCLUDE_DEFERRED_CHECK, NO_DEFERRED_CHECK }; |
| 89 |
| 90 bool IsDereferenceAllowed(DereferenceCheckMode mode) const; |
89 #endif // DEBUG | 91 #endif // DEBUG |
90 | 92 |
91 private: | 93 private: |
92 T** location_; | 94 T** location_; |
93 | 95 |
94 // Handles of different classes are allowed to access each other's location_. | 96 // Handles of different classes are allowed to access each other's location_. |
95 template<class S> friend class Handle; | 97 template<class S> friend class Handle; |
96 }; | 98 }; |
97 | 99 |
98 | 100 |
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344 private: | 346 private: |
345 Isolate* isolate_; | 347 Isolate* isolate_; |
346 Object** limit_; | 348 Object** limit_; |
347 int level_; | 349 int level_; |
348 #endif | 350 #endif |
349 }; | 351 }; |
350 | 352 |
351 } } // namespace v8::internal | 353 } } // namespace v8::internal |
352 | 354 |
353 #endif // V8_HANDLES_H_ | 355 #endif // V8_HANDLES_H_ |
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