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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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2431 // | 2431 // |
2432 class DescriptorArray: public FixedArray { | 2432 class DescriptorArray: public FixedArray { |
2433 public: | 2433 public: |
2434 // Returns true for both shared empty_descriptor_array and for smis, which the | 2434 // Returns true for both shared empty_descriptor_array and for smis, which the |
2435 // map uses to encode additional bit fields when the descriptor array is not | 2435 // map uses to encode additional bit fields when the descriptor array is not |
2436 // yet used. | 2436 // yet used. |
2437 inline bool IsEmpty(); | 2437 inline bool IsEmpty(); |
2438 inline bool MayContainTransitions(); | 2438 inline bool MayContainTransitions(); |
2439 | 2439 |
2440 DECL_ACCESSORS(elements_transition_map, Map) | 2440 DECL_ACCESSORS(elements_transition_map, Map) |
| 2441 inline void ClearElementsTransition(); |
2441 | 2442 |
2442 // Returns the number of descriptors in the array. | 2443 // Returns the number of descriptors in the array. |
2443 int number_of_descriptors() { | 2444 int number_of_descriptors() { |
2444 ASSERT(length() >= kFirstIndex || IsEmpty()); | 2445 ASSERT(length() >= kFirstIndex || IsEmpty()); |
2445 int len = length(); | 2446 int len = length(); |
2446 return len <= kFirstIndex ? 0 : (len - kFirstIndex) / kDescriptorSize; | 2447 return len <= kFirstIndex ? 0 : (len - kFirstIndex) / kDescriptorSize; |
2447 } | 2448 } |
2448 | 2449 |
2449 int NextEnumerationIndex() { | 2450 int NextEnumerationIndex() { |
2450 if (IsEmpty()) return PropertyDetails::kInitialIndex; | 2451 if (IsEmpty()) return PropertyDetails::kInitialIndex; |
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8780 } else { | 8781 } else { |
8781 value &= ~(1 << bit_position); | 8782 value &= ~(1 << bit_position); |
8782 } | 8783 } |
8783 return value; | 8784 return value; |
8784 } | 8785 } |
8785 }; | 8786 }; |
8786 | 8787 |
8787 } } // namespace v8::internal | 8788 } } // namespace v8::internal |
8788 | 8789 |
8789 #endif // V8_OBJECTS_H_ | 8790 #endif // V8_OBJECTS_H_ |
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