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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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2149 ExtensibilityCheck extensibility_check = PERFORM_EXTENSIBILITY_CHECK); | 2149 ExtensibilityCheck extensibility_check = PERFORM_EXTENSIBILITY_CHECK); |
2150 | 2150 |
2151 static inline Handle<String> ExpectedTransitionKey(Handle<Map> map); | 2151 static inline Handle<String> ExpectedTransitionKey(Handle<Map> map); |
2152 static inline Handle<Map> ExpectedTransitionTarget(Handle<Map> map); | 2152 static inline Handle<Map> ExpectedTransitionTarget(Handle<Map> map); |
2153 | 2153 |
2154 // Try to follow an existing transition to a field with attributes NONE. The | 2154 // Try to follow an existing transition to a field with attributes NONE. The |
2155 // return value indicates whether the transition was successful. | 2155 // return value indicates whether the transition was successful. |
2156 static inline Handle<Map> FindTransitionToField(Handle<Map> map, | 2156 static inline Handle<Map> FindTransitionToField(Handle<Map> map, |
2157 Handle<Name> key); | 2157 Handle<Name> key); |
2158 | 2158 |
2159 inline int LastAddedFieldIndex(); | |
2160 | |
2161 // Extend the receiver with a single fast property appeared first in the | 2159 // Extend the receiver with a single fast property appeared first in the |
2162 // passed map. This also extends the property backing store if necessary. | 2160 // passed map. This also extends the property backing store if necessary. |
2163 static void AllocateStorageForMap(Handle<JSObject> object, Handle<Map> map); | 2161 static void AllocateStorageForMap(Handle<JSObject> object, Handle<Map> map); |
2164 | 2162 |
2165 // Migrates the given object to a map whose field representations are the | 2163 // Migrates the given object to a map whose field representations are the |
2166 // lowest upper bound of all known representations for that field. | 2164 // lowest upper bound of all known representations for that field. |
2167 static void MigrateInstance(Handle<JSObject> instance); | 2165 static void MigrateInstance(Handle<JSObject> instance); |
2168 | 2166 |
2169 // Migrates the given object only if the target map is already available, | 2167 // Migrates the given object only if the target map is already available, |
2170 // or returns an empty handle if such a map is not yet available. | 2168 // or returns an empty handle if such a map is not yet available. |
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2327 // represented in a FixedDoubleArray and has at least one value that can only | 2325 // represented in a FixedDoubleArray and has at least one value that can only |
2328 // be represented as a double and not a Smi. | 2326 // be represented as a double and not a Smi. |
2329 bool ShouldConvertToFastDoubleElements(bool* has_smi_only_elements); | 2327 bool ShouldConvertToFastDoubleElements(bool* has_smi_only_elements); |
2330 | 2328 |
2331 // Computes the new capacity when expanding the elements of a JSObject. | 2329 // Computes the new capacity when expanding the elements of a JSObject. |
2332 static int NewElementsCapacity(int old_capacity) { | 2330 static int NewElementsCapacity(int old_capacity) { |
2333 // (old_capacity + 50%) + 16 | 2331 // (old_capacity + 50%) + 16 |
2334 return old_capacity + (old_capacity >> 1) + 16; | 2332 return old_capacity + (old_capacity >> 1) + 16; |
2335 } | 2333 } |
2336 | 2334 |
2337 PropertyType GetLocalPropertyType(Name* name); | |
2338 PropertyType GetLocalElementType(uint32_t index); | |
2339 | |
2340 // These methods do not perform access checks! | 2335 // These methods do not perform access checks! |
2341 AccessorPair* GetLocalPropertyAccessorPair(Name* name); | 2336 AccessorPair* GetLocalPropertyAccessorPair(Name* name); |
2342 AccessorPair* GetLocalElementAccessorPair(uint32_t index); | 2337 AccessorPair* GetLocalElementAccessorPair(uint32_t index); |
2343 | 2338 |
2344 MUST_USE_RESULT MaybeObject* SetFastElement(uint32_t index, | 2339 MUST_USE_RESULT MaybeObject* SetFastElement(uint32_t index, |
2345 Object* value, | 2340 Object* value, |
2346 StrictModeFlag strict_mode, | 2341 StrictModeFlag strict_mode, |
2347 bool check_prototype); | 2342 bool check_prototype); |
2348 | 2343 |
2349 MUST_USE_RESULT MaybeObject* SetDictionaryElement( | 2344 MUST_USE_RESULT MaybeObject* SetDictionaryElement( |
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10238 } else { | 10233 } else { |
10239 value &= ~(1 << bit_position); | 10234 value &= ~(1 << bit_position); |
10240 } | 10235 } |
10241 return value; | 10236 return value; |
10242 } | 10237 } |
10243 }; | 10238 }; |
10244 | 10239 |
10245 } } // namespace v8::internal | 10240 } } // namespace v8::internal |
10246 | 10241 |
10247 #endif // V8_OBJECTS_H_ | 10242 #endif // V8_OBJECTS_H_ |
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