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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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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); | 133 static void SetWrapperClassId(Object** location, uint16_t class_id); |
| 134 static uint16_t GetWrapperClassId(Object** location); |
134 | 135 |
135 // Returns the current number of weak handles. | 136 // Returns the current number of weak handles. |
136 int NumberOfWeakHandles() { return number_of_weak_handles_; } | 137 int NumberOfWeakHandles() { return number_of_weak_handles_; } |
137 | 138 |
138 void RecordStats(HeapStats* stats); | 139 void RecordStats(HeapStats* stats); |
139 | 140 |
140 // Returns the current number of weak handles to global objects. | 141 // Returns the current number of weak handles to global objects. |
141 // These handles are also included in NumberOfWeakHandles(). | 142 // These handles are also included in NumberOfWeakHandles(). |
142 int NumberOfGlobalObjectWeakHandles() { | 143 int NumberOfGlobalObjectWeakHandles() { |
143 return number_of_global_object_weak_handles_; | 144 return number_of_global_object_weak_handles_; |
144 } | 145 } |
145 | 146 |
146 // Returns the current number of handles to global objects. | 147 // Returns the current number of handles to global objects. |
147 int NumberOfGlobalHandles() { | 148 int NumberOfGlobalHandles() { |
148 return number_of_global_handles_; | 149 return number_of_global_handles_; |
149 } | 150 } |
150 | 151 |
151 // Clear the weakness of a global handle. | 152 // Clear the weakness of a global handle. |
152 void ClearWeakness(Object** location); | 153 void ClearWeakness(Object** location); |
153 | 154 |
154 // Clear the weakness of a global handle. | 155 // Clear the weakness of a global handle. |
155 void MarkIndependent(Object** location); | 156 void MarkIndependent(Object** location); |
156 | 157 |
| 158 static bool IsIndependent(Object** location); |
| 159 |
157 // Tells whether global handle is near death. | 160 // Tells whether global handle is near death. |
158 static bool IsNearDeath(Object** location); | 161 static bool IsNearDeath(Object** location); |
159 | 162 |
160 // Tells whether global handle is weak. | 163 // Tells whether global handle is weak. |
161 static bool IsWeak(Object** location); | 164 static bool IsWeak(Object** location); |
162 | 165 |
163 // Process pending weak handles. | 166 // Process pending weak handles. |
164 // Returns true if next major GC is likely to collect more garbage. | 167 // Returns true if next major GC is likely to collect more garbage. |
165 bool PostGarbageCollectionProcessing(GarbageCollector collector); | 168 bool PostGarbageCollectionProcessing(GarbageCollector collector); |
166 | 169 |
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276 | 279 |
277 friend class Isolate; | 280 friend class Isolate; |
278 | 281 |
279 DISALLOW_COPY_AND_ASSIGN(GlobalHandles); | 282 DISALLOW_COPY_AND_ASSIGN(GlobalHandles); |
280 }; | 283 }; |
281 | 284 |
282 | 285 |
283 } } // namespace v8::internal | 286 } } // namespace v8::internal |
284 | 287 |
285 #endif // V8_GLOBAL_HANDLES_H_ | 288 #endif // V8_GLOBAL_HANDLES_H_ |
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