| // Copyright 2018 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_OBJECTS_PROPERTY_ARRAY_H_ |
| #define V8_OBJECTS_PROPERTY_ARRAY_H_ |
| |
| #include "src/objects/heap-object.h" |
| |
| // Has to be the last include (doesn't have include guards): |
| #include "src/objects/object-macros.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| class PropertyArray : public HeapObjectPtr { |
| public: |
| // [length]: length of the array. |
| inline int length() const; |
| |
| // Get the length using acquire loads. |
| inline int synchronized_length() const; |
| |
| // This is only used on a newly allocated PropertyArray which |
| // doesn't have an existing hash. |
| inline void initialize_length(int length); |
| |
| inline void SetHash(int hash); |
| inline int Hash() const; |
| |
| inline Object* get(int index) const; |
| |
| inline void set(int index, Object* value); |
| // Setter with explicit barrier mode. |
| inline void set(int index, Object* value, WriteBarrierMode mode); |
| |
| // Gives access to raw memory which stores the array's data. |
| inline ObjectSlot data_start(); |
| |
| // Garbage collection support. |
| static constexpr int SizeFor(int length) { |
| return kHeaderSize + length * kPointerSize; |
| } |
| |
| DECL_CAST2(PropertyArray) |
| DECL_PRINTER(PropertyArray) |
| DECL_VERIFIER(PropertyArray) |
| |
| // Layout description. |
| static const int kLengthAndHashOffset = HeapObject::kHeaderSize; |
| static const int kHeaderSize = kLengthAndHashOffset + kPointerSize; |
| |
| // Garbage collection support. |
| typedef FlexibleBodyDescriptor<kHeaderSize> BodyDescriptor; |
| |
| static const int kLengthFieldSize = 10; |
| class LengthField : public BitField<int, 0, kLengthFieldSize> {}; |
| static const int kMaxLength = LengthField::kMax; |
| class HashField : public BitField<int, kLengthFieldSize, |
| kSmiValueSize - kLengthFieldSize - 1> {}; |
| |
| static const int kNoHashSentinel = 0; |
| |
| OBJECT_CONSTRUCTORS(PropertyArray, HeapObjectPtr); |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #include "src/objects/object-macros-undef.h" |
| |
| #endif // V8_OBJECTS_PROPERTY_ARRAY_H_ |