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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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66 ELEMENTS_TRANSITION = 7, | 66 ELEMENTS_TRANSITION = 7, |
67 CONSTANT_TRANSITION = 8, // only in fast mode | 67 CONSTANT_TRANSITION = 8, // only in fast mode |
68 NULL_DESCRIPTOR = 9, // only in fast mode | 68 NULL_DESCRIPTOR = 9, // only in fast mode |
69 // There are no IC stubs for NULL_DESCRIPTORS. Therefore, | 69 // There are no IC stubs for NULL_DESCRIPTORS. Therefore, |
70 // NULL_DESCRIPTOR can be used as the type flag for IC stubs for | 70 // NULL_DESCRIPTOR can be used as the type flag for IC stubs for |
71 // nonexistent properties. | 71 // nonexistent properties. |
72 NONEXISTENT = NULL_DESCRIPTOR | 72 NONEXISTENT = NULL_DESCRIPTOR |
73 }; | 73 }; |
74 | 74 |
75 | 75 |
76 inline bool IsRealProperty(PropertyType type) { | |
77 switch (type) { | |
78 case NORMAL: | |
79 case FIELD: | |
80 case CONSTANT_FUNCTION: | |
81 case CALLBACKS: | |
82 case HANDLER: | |
83 case INTERCEPTOR: | |
84 return true; | |
85 case MAP_TRANSITION: | |
86 case ELEMENTS_TRANSITION: | |
87 case CONSTANT_TRANSITION: | |
88 case NULL_DESCRIPTOR: | |
89 return false; | |
90 } | |
91 UNREACHABLE(); // keep the compiler happy | |
92 return false; | |
93 } | |
94 | |
95 | |
96 // PropertyDetails captures type and attributes for a property. | 76 // PropertyDetails captures type and attributes for a property. |
97 // They are used both in property dictionaries and instance descriptors. | 77 // They are used both in property dictionaries and instance descriptors. |
98 class PropertyDetails BASE_EMBEDDED { | 78 class PropertyDetails BASE_EMBEDDED { |
99 public: | 79 public: |
100 PropertyDetails(PropertyAttributes attributes, | 80 PropertyDetails(PropertyAttributes attributes, |
101 PropertyType type, | 81 PropertyType type, |
102 int index = 0) { | 82 int index = 0) { |
103 ASSERT(TypeField::is_valid(type)); | 83 ASSERT(TypeField::is_valid(type)); |
104 ASSERT(AttributesField::is_valid(attributes)); | 84 ASSERT(AttributesField::is_valid(attributes)); |
105 ASSERT(StorageField::is_valid(index)); | 85 ASSERT(StorageField::is_valid(index)); |
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143 | 123 |
144 static const int kInitialIndex = 1; | 124 static const int kInitialIndex = 1; |
145 | 125 |
146 private: | 126 private: |
147 uint32_t value_; | 127 uint32_t value_; |
148 }; | 128 }; |
149 | 129 |
150 } } // namespace v8::internal | 130 } } // namespace v8::internal |
151 | 131 |
152 #endif // V8_PROPERTY_DETAILS_H_ | 132 #endif // V8_PROPERTY_DETAILS_H_ |
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