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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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| 149 // function expressions, only), otherwise returns a value < 0. The name | 149 // function expressions, only), otherwise returns a value < 0. The name |
| 150 // must be a symbol (canonicalized). | 150 // must be a symbol (canonicalized). |
| 151 int FunctionContextSlotIndex(String* name); | 151 int FunctionContextSlotIndex(String* name); |
| 152 | 152 |
| 153 static Handle<SerializedScopeInfo> Create(Scope* scope); | 153 static Handle<SerializedScopeInfo> Create(Scope* scope); |
| 154 | 154 |
| 155 // Serializes empty scope info. | 155 // Serializes empty scope info. |
| 156 static SerializedScopeInfo* Empty(); | 156 static SerializedScopeInfo* Empty(); |
| 157 | 157 |
| 158 private: | 158 private: |
| 159 | |
| 160 inline Object** ContextEntriesAddr(); | 159 inline Object** ContextEntriesAddr(); |
| 161 | 160 |
| 162 inline Object** ParameterEntriesAddr(); | 161 inline Object** ParameterEntriesAddr(); |
| 163 | 162 |
| 164 inline Object** StackSlotEntriesAddr(); | 163 inline Object** StackSlotEntriesAddr(); |
| 165 }; | 164 }; |
| 166 | 165 |
| 167 | 166 |
| 168 // Cache for mapping (data, property name) into context slot index. | 167 // Cache for mapping (data, property name) into context slot index. |
| 169 // The cache contains both positive and negative results. | 168 // The cache contains both positive and negative results. |
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| 180 // Update an element in the cache. | 179 // Update an element in the cache. |
| 181 void Update(Object* data, | 180 void Update(Object* data, |
| 182 String* name, | 181 String* name, |
| 183 Variable::Mode mode, | 182 Variable::Mode mode, |
| 184 int slot_index); | 183 int slot_index); |
| 185 | 184 |
| 186 // Clear the cache. | 185 // Clear the cache. |
| 187 void Clear(); | 186 void Clear(); |
| 188 | 187 |
| 189 static const int kNotFound = -2; | 188 static const int kNotFound = -2; |
| 189 |
| 190 private: | 190 private: |
| 191 ContextSlotCache() { | 191 ContextSlotCache() { |
| 192 for (int i = 0; i < kLength; ++i) { | 192 for (int i = 0; i < kLength; ++i) { |
| 193 keys_[i].data = NULL; | 193 keys_[i].data = NULL; |
| 194 keys_[i].name = NULL; | 194 keys_[i].name = NULL; |
| 195 values_[i] = kNotFound; | 195 values_[i] = kNotFound; |
| 196 } | 196 } |
| 197 } | 197 } |
| 198 | 198 |
| 199 inline static int Hash(Object* data, String* name); | 199 inline static int Hash(Object* data, String* name); |
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| 240 uint32_t values_[kLength]; | 240 uint32_t values_[kLength]; |
| 241 | 241 |
| 242 friend class Isolate; | 242 friend class Isolate; |
| 243 DISALLOW_COPY_AND_ASSIGN(ContextSlotCache); | 243 DISALLOW_COPY_AND_ASSIGN(ContextSlotCache); |
| 244 }; | 244 }; |
| 245 | 245 |
| 246 | 246 |
| 247 } } // namespace v8::internal | 247 } } // namespace v8::internal |
| 248 | 248 |
| 249 #endif // V8_SCOPEINFO_H_ | 249 #endif // V8_SCOPEINFO_H_ |
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