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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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1466 inline bool HasExternalShortElements(); | 1466 inline bool HasExternalShortElements(); |
1467 inline bool HasExternalUnsignedShortElements(); | 1467 inline bool HasExternalUnsignedShortElements(); |
1468 inline bool HasExternalIntElements(); | 1468 inline bool HasExternalIntElements(); |
1469 inline bool HasExternalUnsignedIntElements(); | 1469 inline bool HasExternalUnsignedIntElements(); |
1470 inline bool HasExternalFloatElements(); | 1470 inline bool HasExternalFloatElements(); |
1471 inline bool HasExternalDoubleElements(); | 1471 inline bool HasExternalDoubleElements(); |
1472 bool HasFastArgumentsElements(); | 1472 bool HasFastArgumentsElements(); |
1473 bool HasDictionaryArgumentsElements(); | 1473 bool HasDictionaryArgumentsElements(); |
1474 inline NumberDictionary* element_dictionary(); // Gets slow elements. | 1474 inline NumberDictionary* element_dictionary(); // Gets slow elements. |
1475 | 1475 |
| 1476 inline void set_map_and_elements( |
| 1477 Map* map, |
| 1478 FixedArrayBase* value, |
| 1479 WriteBarrierMode mode = UPDATE_WRITE_BARRIER); |
| 1480 |
1476 // Requires: HasFastElements(). | 1481 // Requires: HasFastElements(). |
1477 MUST_USE_RESULT inline MaybeObject* EnsureWritableFastElements(); | 1482 MUST_USE_RESULT inline MaybeObject* EnsureWritableFastElements(); |
1478 | 1483 |
1479 // Collects elements starting at index 0. | 1484 // Collects elements starting at index 0. |
1480 // Undefined values are placed after non-undefined values. | 1485 // Undefined values are placed after non-undefined values. |
1481 // Returns the number of non-undefined values. | 1486 // Returns the number of non-undefined values. |
1482 MUST_USE_RESULT MaybeObject* PrepareElementsForSort(uint32_t limit); | 1487 MUST_USE_RESULT MaybeObject* PrepareElementsForSort(uint32_t limit); |
1483 // As PrepareElementsForSort, but only on objects where elements is | 1488 // As PrepareElementsForSort, but only on objects where elements is |
1484 // a dictionary, and it will stay a dictionary. | 1489 // a dictionary, and it will stay a dictionary. |
1485 MUST_USE_RESULT MaybeObject* PrepareSlowElementsForSort(uint32_t limit); | 1490 MUST_USE_RESULT MaybeObject* PrepareSlowElementsForSort(uint32_t limit); |
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1637 | 1642 |
1638 // Do we want to keep the elements in fast case when increasing the | 1643 // Do we want to keep the elements in fast case when increasing the |
1639 // capacity? | 1644 // capacity? |
1640 bool ShouldConvertToSlowElements(int new_capacity); | 1645 bool ShouldConvertToSlowElements(int new_capacity); |
1641 // Returns true if the backing storage for the slow-case elements of | 1646 // Returns true if the backing storage for the slow-case elements of |
1642 // this object takes up nearly as much space as a fast-case backing | 1647 // this object takes up nearly as much space as a fast-case backing |
1643 // storage would. In that case the JSObject should have fast | 1648 // storage would. In that case the JSObject should have fast |
1644 // elements. | 1649 // elements. |
1645 bool ShouldConvertToFastElements(); | 1650 bool ShouldConvertToFastElements(); |
1646 // Returns true if the elements of JSObject contains only values that can be | 1651 // Returns true if the elements of JSObject contains only values that can be |
1647 // represented in a FixedDoubleArray. | 1652 // represented in a FixedDoubleArray and has at least one value that can only |
1648 bool CanConvertToFastDoubleElements(); | 1653 // be represented as a double and not a Smi. |
| 1654 bool ShouldConvertToFastDoubleElements(bool* has_smi_only_elements); |
1649 | 1655 |
1650 // Tells whether the index'th element is present. | 1656 // Tells whether the index'th element is present. |
1651 bool HasElementWithReceiver(JSReceiver* receiver, uint32_t index); | 1657 bool HasElementWithReceiver(JSReceiver* receiver, uint32_t index); |
1652 | 1658 |
1653 // Computes the new capacity when expanding the elements of a JSObject. | 1659 // Computes the new capacity when expanding the elements of a JSObject. |
1654 static int NewElementsCapacity(int old_capacity) { | 1660 static int NewElementsCapacity(int old_capacity) { |
1655 // (old_capacity + 50%) + 16 | 1661 // (old_capacity + 50%) + 16 |
1656 return old_capacity + (old_capacity >> 1) + 16; | 1662 return old_capacity + (old_capacity >> 1) + 16; |
1657 } | 1663 } |
1658 | 1664 |
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1701 Object* value, | 1707 Object* value, |
1702 StrictModeFlag strict_mode, | 1708 StrictModeFlag strict_mode, |
1703 bool check_prototype); | 1709 bool check_prototype); |
1704 | 1710 |
1705 // Returns the index'th element. | 1711 // Returns the index'th element. |
1706 // The undefined object if index is out of bounds. | 1712 // The undefined object if index is out of bounds. |
1707 MaybeObject* GetElementWithInterceptor(Object* receiver, uint32_t index); | 1713 MaybeObject* GetElementWithInterceptor(Object* receiver, uint32_t index); |
1708 | 1714 |
1709 enum SetFastElementsCapacityMode { | 1715 enum SetFastElementsCapacityMode { |
1710 kAllowSmiOnlyElements, | 1716 kAllowSmiOnlyElements, |
| 1717 kForceSmiOnlyElements, |
1711 kDontAllowSmiOnlyElements | 1718 kDontAllowSmiOnlyElements |
1712 }; | 1719 }; |
1713 | 1720 |
1714 // Replace the elements' backing store with fast elements of the given | 1721 // Replace the elements' backing store with fast elements of the given |
1715 // capacity. Update the length for JSArrays. Returns the new backing | 1722 // capacity. Update the length for JSArrays. Returns the new backing |
1716 // store. | 1723 // store. |
1717 MUST_USE_RESULT MaybeObject* SetFastElementsCapacityAndLength( | 1724 MUST_USE_RESULT MaybeObject* SetFastElementsCapacityAndLength( |
1718 int capacity, | 1725 int capacity, |
1719 int length, | 1726 int length, |
1720 SetFastElementsCapacityMode set_capacity_mode); | 1727 SetFastElementsCapacityMode set_capacity_mode); |
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8001 } else { | 8008 } else { |
8002 value &= ~(1 << bit_position); | 8009 value &= ~(1 << bit_position); |
8003 } | 8010 } |
8004 return value; | 8011 return value; |
8005 } | 8012 } |
8006 }; | 8013 }; |
8007 | 8014 |
8008 } } // namespace v8::internal | 8015 } } // namespace v8::internal |
8009 | 8016 |
8010 #endif // V8_OBJECTS_H_ | 8017 #endif // V8_OBJECTS_H_ |
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