Line data    Source code

       1             : // Copyright 2018 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_OBJECTS_PROPERTY_ARRAY_H_
       6             : #define V8_OBJECTS_PROPERTY_ARRAY_H_
       7             : 
       8             : #include "src/objects/heap-object.h"
       9             : #include "torque-generated/class-definitions-from-dsl.h"
      10             : 
      11             : // Has to be the last include (doesn't have include guards):
      12             : #include "src/objects/object-macros.h"
      13             : 
      14             : namespace v8 {
      15             : namespace internal {
      16             : 
      17             : class PropertyArray : public HeapObject {
      18             :  public:
      19             :   // [length]: length of the array.
      20             :   inline int length() const;
      21             : 
      22             :   // Get the length using acquire loads.
      23             :   inline int synchronized_length() const;
      24             : 
      25             :   // This is only used on a newly allocated PropertyArray which
      26             :   // doesn't have an existing hash.
      27             :   inline void initialize_length(int length);
      28             : 
      29             :   inline void SetHash(int hash);
      30             :   inline int Hash() const;
      31             : 
      32             :   inline Object get(int index) const;
      33             : 
      34             :   inline void set(int index, Object value);
      35             :   // Setter with explicit barrier mode.
      36             :   inline void set(int index, Object value, WriteBarrierMode mode);
      37             : 
      38             :   // Gives access to raw memory which stores the array's data.
      39             :   inline ObjectSlot data_start();
      40             : 
      41             :   // Garbage collection support.
      42             :   static constexpr int SizeFor(int length) {
      43   575620248 :     return kHeaderSize + length * kTaggedSize;
      44             :   }
      45             :   static constexpr int OffsetOfElementAt(int index) { return SizeFor(index); }
      46             : 
      47             :   DECL_CAST(PropertyArray)
      48             :   DECL_PRINTER(PropertyArray)
      49             :   DECL_VERIFIER(PropertyArray)
      50             : 
      51             :   DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize,
      52             :                                 TORQUE_GENERATED_PROPERTY_ARRAY_FIELDS)
      53             :   static const int kHeaderSize = kSize;
      54             : 
      55             :   // Garbage collection support.
      56             :   using BodyDescriptor = FlexibleBodyDescriptor<kHeaderSize>;
      57             : 
      58             :   static const int kLengthFieldSize = 10;
      59             :   class LengthField : public BitField<int, 0, kLengthFieldSize> {};
      60             :   static const int kMaxLength = LengthField::kMax;
      61             :   class HashField : public BitField<int, kLengthFieldSize,
      62             :                                     kSmiValueSize - kLengthFieldSize - 1> {};
      63             : 
      64             :   static const int kNoHashSentinel = 0;
      65             : 
      66             :   OBJECT_CONSTRUCTORS(PropertyArray, HeapObject);
      67             : };
      68             : 
      69             : }  // namespace internal
      70             : }  // namespace v8
      71             : 
      72             : #include "src/objects/object-macros-undef.h"
      73             : 
      74             : #endif  // V8_OBJECTS_PROPERTY_ARRAY_H_