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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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123 // Make the global handle weak and set the callback parameter for the | 123 // Make the global handle weak and set the callback parameter for the |
124 // handle. When the garbage collector recognizes that only weak global | 124 // handle. When the garbage collector recognizes that only weak global |
125 // handles point to an object the handles are cleared and the callback | 125 // handles point to an object the handles are cleared and the callback |
126 // function is invoked (for each handle) with the handle and corresponding | 126 // function is invoked (for each handle) with the handle and corresponding |
127 // parameter as arguments. Note: cleared means set to Smi::FromInt(0). The | 127 // parameter as arguments. Note: cleared means set to Smi::FromInt(0). The |
128 // reason is that Smi::FromInt(0) does not change during garage collection. | 128 // reason is that Smi::FromInt(0) does not change during garage collection. |
129 void MakeWeak(Object** location, | 129 void MakeWeak(Object** location, |
130 void* parameter, | 130 void* parameter, |
131 WeakReferenceCallback callback); | 131 WeakReferenceCallback callback); |
132 | 132 |
133 static void SetWrapperClassId(Object** location, uint16_t class_id); | |
134 static uint16_t GetWrapperClassId(Object** location); | |
135 | |
136 // Returns the current number of weak handles. | 133 // Returns the current number of weak handles. |
137 int NumberOfWeakHandles() { return number_of_weak_handles_; } | 134 int NumberOfWeakHandles() { return number_of_weak_handles_; } |
138 | 135 |
139 void RecordStats(HeapStats* stats); | 136 void RecordStats(HeapStats* stats); |
140 | 137 |
141 // Returns the current number of weak handles to global objects. | 138 // Returns the current number of weak handles to global objects. |
142 // These handles are also included in NumberOfWeakHandles(). | 139 // These handles are also included in NumberOfWeakHandles(). |
143 int NumberOfGlobalObjectWeakHandles() { | 140 int NumberOfGlobalObjectWeakHandles() { |
144 return number_of_global_object_weak_handles_; | 141 return number_of_global_object_weak_handles_; |
145 } | 142 } |
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289 | 286 |
290 friend class Isolate; | 287 friend class Isolate; |
291 | 288 |
292 DISALLOW_COPY_AND_ASSIGN(GlobalHandles); | 289 DISALLOW_COPY_AND_ASSIGN(GlobalHandles); |
293 }; | 290 }; |
294 | 291 |
295 | 292 |
296 } } // namespace v8::internal | 293 } } // namespace v8::internal |
297 | 294 |
298 #endif // V8_GLOBAL_HANDLES_H_ | 295 #endif // V8_GLOBAL_HANDLES_H_ |
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