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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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88 | 88 |
89 // Closes the given scope, but lets this handle escape. See | 89 // Closes the given scope, but lets this handle escape. See |
90 // implementation in api.h. | 90 // implementation in api.h. |
91 inline Handle<T> EscapeFrom(v8::HandleScope* scope); | 91 inline Handle<T> EscapeFrom(v8::HandleScope* scope); |
92 | 92 |
93 private: | 93 private: |
94 T** location_; | 94 T** location_; |
95 }; | 95 }; |
96 | 96 |
97 | 97 |
| 98 class DeferredHandles; |
98 class HandleScopeImplementer; | 99 class HandleScopeImplementer; |
99 | 100 |
100 | 101 |
101 // A stack-allocated class that governs a number of local handles. | 102 // A stack-allocated class that governs a number of local handles. |
102 // After a handle scope has been created, all local handles will be | 103 // After a handle scope has been created, all local handles will be |
103 // allocated within that handle scope until either the handle scope is | 104 // allocated within that handle scope until either the handle scope is |
104 // deleted or another handle scope is created. If there is already a | 105 // deleted or another handle scope is created. If there is already a |
105 // handle scope and a new one is created, all allocations will take | 106 // handle scope and a new one is created, all allocations will take |
106 // place in the new handle scope until it is deleted. After that, | 107 // place in the new handle scope until it is deleted. After that, |
107 // new handles will again be allocated in the original handle scope. | 108 // new handles will again be allocated in the original handle scope. |
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152 Isolate* isolate_; | 153 Isolate* isolate_; |
153 Object** prev_next_; | 154 Object** prev_next_; |
154 Object** prev_limit_; | 155 Object** prev_limit_; |
155 | 156 |
156 // Extend the handle scope making room for more handles. | 157 // Extend the handle scope making room for more handles. |
157 static internal::Object** Extend(); | 158 static internal::Object** Extend(); |
158 | 159 |
159 // Zaps the handles in the half-open interval [start, end). | 160 // Zaps the handles in the half-open interval [start, end). |
160 static void ZapRange(internal::Object** start, internal::Object** end); | 161 static void ZapRange(internal::Object** start, internal::Object** end); |
161 | 162 |
| 163 friend class v8::internal::DeferredHandles; |
162 friend class v8::HandleScope; | 164 friend class v8::HandleScope; |
163 friend class v8::internal::HandleScopeImplementer; | 165 friend class v8::internal::HandleScopeImplementer; |
164 friend class v8::ImplementationUtilities; | 166 friend class v8::ImplementationUtilities; |
| 167 friend class v8::internal::Isolate; |
165 }; | 168 }; |
166 | 169 |
167 | 170 |
168 class DeferredHandles; | 171 class DeferredHandles; |
169 | 172 |
170 | 173 |
171 class DeferredHandleScope { | 174 class DeferredHandleScope { |
172 public: | 175 public: |
173 explicit DeferredHandleScope(Isolate* isolate); | 176 explicit DeferredHandleScope(Isolate* isolate); |
174 // The DeferredHandles object returned stores the Handles created | 177 // The DeferredHandles object returned stores the Handles created |
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323 inline NoHandleAllocation(); | 326 inline NoHandleAllocation(); |
324 inline ~NoHandleAllocation(); | 327 inline ~NoHandleAllocation(); |
325 private: | 328 private: |
326 int level_; | 329 int level_; |
327 #endif | 330 #endif |
328 }; | 331 }; |
329 | 332 |
330 } } // namespace v8::internal | 333 } } // namespace v8::internal |
331 | 334 |
332 #endif // V8_HANDLES_H_ | 335 #endif // V8_HANDLES_H_ |
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