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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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3586 set_bit_field2(bit_field2() | (1 << kHasFastElements)); | 3586 set_bit_field2(bit_field2() | (1 << kHasFastElements)); |
3587 } else { | 3587 } else { |
3588 set_bit_field2(bit_field2() & ~(1 << kHasFastElements)); | 3588 set_bit_field2(bit_field2() & ~(1 << kHasFastElements)); |
3589 } | 3589 } |
3590 } | 3590 } |
3591 | 3591 |
3592 inline bool has_fast_elements() { | 3592 inline bool has_fast_elements() { |
3593 return ((1 << kHasFastElements) & bit_field2()) != 0; | 3593 return ((1 << kHasFastElements) & bit_field2()) != 0; |
3594 } | 3594 } |
3595 | 3595 |
| 3596 // Tells whether an instance has pixel array elements. |
| 3597 inline void set_has_pixel_array_elements(bool value) { |
| 3598 if (value) { |
| 3599 set_bit_field2(bit_field2() | (1 << kHasPixelArrayElements)); |
| 3600 } else { |
| 3601 set_bit_field2(bit_field2() & ~(1 << kHasPixelArrayElements)); |
| 3602 } |
| 3603 } |
| 3604 |
| 3605 inline bool has_pixel_array_elements() { |
| 3606 return ((1 << kHasPixelArrayElements) & bit_field2()) != 0; |
| 3607 } |
| 3608 |
3596 // Tells whether the map is attached to SharedFunctionInfo | 3609 // Tells whether the map is attached to SharedFunctionInfo |
3597 // (for inobject slack tracking). | 3610 // (for inobject slack tracking). |
3598 inline void set_attached_to_shared_function_info(bool value); | 3611 inline void set_attached_to_shared_function_info(bool value); |
3599 | 3612 |
3600 inline bool attached_to_shared_function_info(); | 3613 inline bool attached_to_shared_function_info(); |
3601 | 3614 |
3602 // Tells whether the map is shared between objects that may have different | 3615 // Tells whether the map is shared between objects that may have different |
3603 // behavior. If true, the map should never be modified, instead a clone | 3616 // behavior. If true, the map should never be modified, instead a clone |
3604 // should be created and modified. | 3617 // should be created and modified. |
3605 inline void set_is_shared(bool value); | 3618 inline void set_is_shared(bool value); |
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3644 // Returns this map if it has the fast elements bit set, otherwise | 3657 // Returns this map if it has the fast elements bit set, otherwise |
3645 // returns a copy of the map, with all transitions dropped from the | 3658 // returns a copy of the map, with all transitions dropped from the |
3646 // descriptors and the fast elements bit set. | 3659 // descriptors and the fast elements bit set. |
3647 MUST_USE_RESULT inline MaybeObject* GetFastElementsMap(); | 3660 MUST_USE_RESULT inline MaybeObject* GetFastElementsMap(); |
3648 | 3661 |
3649 // Returns this map if it has the fast elements bit cleared, | 3662 // Returns this map if it has the fast elements bit cleared, |
3650 // otherwise returns a copy of the map, with all transitions dropped | 3663 // otherwise returns a copy of the map, with all transitions dropped |
3651 // from the descriptors and the fast elements bit cleared. | 3664 // from the descriptors and the fast elements bit cleared. |
3652 MUST_USE_RESULT inline MaybeObject* GetSlowElementsMap(); | 3665 MUST_USE_RESULT inline MaybeObject* GetSlowElementsMap(); |
3653 | 3666 |
| 3667 // Returns this map if it has the pixel array elements bit is set, otherwise |
| 3668 // returns a copy of the map, with all transitions dropped from the |
| 3669 // descriptors and the pixel array elements bit set. |
| 3670 MUST_USE_RESULT inline MaybeObject* GetPixelArrayElementsMap(); |
| 3671 |
3654 // Returns the property index for name (only valid for FAST MODE). | 3672 // Returns the property index for name (only valid for FAST MODE). |
3655 int PropertyIndexFor(String* name); | 3673 int PropertyIndexFor(String* name); |
3656 | 3674 |
3657 // Returns the next free property index (only valid for FAST MODE). | 3675 // Returns the next free property index (only valid for FAST MODE). |
3658 int NextFreePropertyIndex(); | 3676 int NextFreePropertyIndex(); |
3659 | 3677 |
3660 // Returns the number of properties described in instance_descriptors. | 3678 // Returns the number of properties described in instance_descriptors. |
3661 int NumberOfDescribedProperties(); | 3679 int NumberOfDescribedProperties(); |
3662 | 3680 |
3663 // Casting. | 3681 // Casting. |
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3762 static const int kHasInstanceCallHandler = 6; | 3780 static const int kHasInstanceCallHandler = 6; |
3763 static const int kIsAccessCheckNeeded = 7; | 3781 static const int kIsAccessCheckNeeded = 7; |
3764 | 3782 |
3765 // Bit positions for bit field 2 | 3783 // Bit positions for bit field 2 |
3766 static const int kIsExtensible = 0; | 3784 static const int kIsExtensible = 0; |
3767 static const int kFunctionWithPrototype = 1; | 3785 static const int kFunctionWithPrototype = 1; |
3768 static const int kHasFastElements = 2; | 3786 static const int kHasFastElements = 2; |
3769 static const int kStringWrapperSafeForDefaultValueOf = 3; | 3787 static const int kStringWrapperSafeForDefaultValueOf = 3; |
3770 static const int kAttachedToSharedFunctionInfo = 4; | 3788 static const int kAttachedToSharedFunctionInfo = 4; |
3771 static const int kIsShared = 5; | 3789 static const int kIsShared = 5; |
| 3790 static const int kHasPixelArrayElements = 6; |
3772 | 3791 |
3773 // Layout of the default cache. It holds alternating name and code objects. | 3792 // Layout of the default cache. It holds alternating name and code objects. |
3774 static const int kCodeCacheEntrySize = 2; | 3793 static const int kCodeCacheEntrySize = 2; |
3775 static const int kCodeCacheEntryNameOffset = 0; | 3794 static const int kCodeCacheEntryNameOffset = 0; |
3776 static const int kCodeCacheEntryCodeOffset = 1; | 3795 static const int kCodeCacheEntryCodeOffset = 1; |
3777 | 3796 |
3778 typedef FixedBodyDescriptor<kPointerFieldsBeginOffset, | 3797 typedef FixedBodyDescriptor<kPointerFieldsBeginOffset, |
3779 kPointerFieldsEndOffset, | 3798 kPointerFieldsEndOffset, |
3780 kSize> BodyDescriptor; | 3799 kSize> BodyDescriptor; |
3781 | 3800 |
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6500 } else { | 6519 } else { |
6501 value &= ~(1 << bit_position); | 6520 value &= ~(1 << bit_position); |
6502 } | 6521 } |
6503 return value; | 6522 return value; |
6504 } | 6523 } |
6505 }; | 6524 }; |
6506 | 6525 |
6507 } } // namespace v8::internal | 6526 } } // namespace v8::internal |
6508 | 6527 |
6509 #endif // V8_OBJECTS_H_ | 6528 #endif // V8_OBJECTS_H_ |
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