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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_TRANSITIONS_H_ | 5 #ifndef V8_TRANSITIONS_H_ |
6 #define V8_TRANSITIONS_H_ | 6 #define V8_TRANSITIONS_H_ |
7 | 7 |
8 #include "src/checks.h" | 8 #include "src/checks.h" |
9 #include "src/elements-kind.h" | 9 #include "src/elements-kind.h" |
10 #include "src/heap/heap.h" | 10 #include "src/heap/heap.h" |
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133 static const int kPrototypeTransitionsOffset = kBackPointerStorageOffset + | 133 static const int kPrototypeTransitionsOffset = kBackPointerStorageOffset + |
134 kPointerSize; | 134 kPointerSize; |
135 | 135 |
136 // Layout of map transition entries in full transition arrays. | 136 // Layout of map transition entries in full transition arrays. |
137 static const int kTransitionKey = 0; | 137 static const int kTransitionKey = 0; |
138 static const int kTransitionTarget = 1; | 138 static const int kTransitionTarget = 1; |
139 static const int kTransitionSize = 2; | 139 static const int kTransitionSize = 2; |
140 | 140 |
141 #ifdef OBJECT_PRINT | 141 #ifdef OBJECT_PRINT |
142 // Print all the transitions. | 142 // Print all the transitions. |
143 void PrintTransitions(OStream& os); // NOLINT | 143 void PrintTransitions(std::ostream& os); // NOLINT |
144 #endif | 144 #endif |
145 | 145 |
146 #ifdef DEBUG | 146 #ifdef DEBUG |
147 bool IsSortedNoDuplicates(int valid_entries = -1); | 147 bool IsSortedNoDuplicates(int valid_entries = -1); |
148 bool IsConsistentWithBackPointers(Map* current_map); | 148 bool IsConsistentWithBackPointers(Map* current_map); |
149 bool IsEqualTo(TransitionArray* other); | 149 bool IsEqualTo(TransitionArray* other); |
150 #endif | 150 #endif |
151 | 151 |
152 // The maximum number of transitions we want in a transition array (should | 152 // The maximum number of transitions we want in a transition array (should |
153 // fit in a page). | 153 // fit in a page). |
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185 int origin_transition, | 185 int origin_transition, |
186 int target_transition); | 186 int target_transition); |
187 | 187 |
188 DISALLOW_IMPLICIT_CONSTRUCTORS(TransitionArray); | 188 DISALLOW_IMPLICIT_CONSTRUCTORS(TransitionArray); |
189 }; | 189 }; |
190 | 190 |
191 | 191 |
192 } } // namespace v8::internal | 192 } } // namespace v8::internal |
193 | 193 |
194 #endif // V8_TRANSITIONS_H_ | 194 #endif // V8_TRANSITIONS_H_ |
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