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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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37 // ElementsKinds. | 37 // ElementsKinds. |
38 class ElementsAccessor { | 38 class ElementsAccessor { |
39 public: | 39 public: |
40 ElementsAccessor() { } | 40 ElementsAccessor() { } |
41 virtual ~ElementsAccessor() { } | 41 virtual ~ElementsAccessor() { } |
42 virtual MaybeObject* Get(FixedArrayBase* backing_store, | 42 virtual MaybeObject* Get(FixedArrayBase* backing_store, |
43 uint32_t key, | 43 uint32_t key, |
44 JSObject* holder, | 44 JSObject* holder, |
45 Object* receiver) = 0; | 45 Object* receiver) = 0; |
46 | 46 |
| 47 // Modifies the length data property as specified for JSArrays and resizes |
| 48 // the underlying backing store accordingly. |
| 49 virtual MaybeObject* SetLength(JSObject* holder, |
| 50 Object* new_length) = 0; |
| 51 |
47 virtual MaybeObject* Delete(JSObject* holder, | 52 virtual MaybeObject* Delete(JSObject* holder, |
48 uint32_t key, | 53 uint32_t key, |
49 JSReceiver::DeleteMode mode) = 0; | 54 JSReceiver::DeleteMode mode) = 0; |
50 | 55 |
51 virtual MaybeObject* AddElementsToFixedArray(FixedArrayBase* from, | 56 virtual MaybeObject* AddElementsToFixedArray(FixedArrayBase* from, |
52 FixedArray* to, | 57 FixedArray* to, |
53 JSObject* holder, | 58 JSObject* holder, |
54 Object* receiver) = 0; | 59 Object* receiver) = 0; |
55 | 60 |
56 // Returns a shared ElementsAccessor for the specified ElementsKind. | 61 // Returns a shared ElementsAccessor for the specified ElementsKind. |
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86 | 91 |
87 private: | 92 private: |
88 static ElementsAccessor** elements_accessors_; | 93 static ElementsAccessor** elements_accessors_; |
89 | 94 |
90 DISALLOW_COPY_AND_ASSIGN(ElementsAccessor); | 95 DISALLOW_COPY_AND_ASSIGN(ElementsAccessor); |
91 }; | 96 }; |
92 | 97 |
93 } } // namespace v8::internal | 98 } } // namespace v8::internal |
94 | 99 |
95 #endif // V8_ELEMENTS_H_ | 100 #endif // V8_ELEMENTS_H_ |
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