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src/hotspot/share/oops/objArrayOop.hpp

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42   friend class psPromotionManager;
43   friend class CSetMarkWordClosure;
44   friend class Continuation;
45   template <typename T>
46   friend class RawOopWriter;
47   friend class AOTMapLogger;
48 
49   template <class T> T* obj_at_addr(int index) const;
50 
51   template <class T>
52   static ptrdiff_t obj_at_offset(int index) {
53     return base_offset_in_bytes() + sizeof(T) * index;
54   }
55 
56  public:
57   // Returns the offset of the first element.
58   static int base_offset_in_bytes() {
59     return arrayOopDesc::base_offset_in_bytes(T_OBJECT);
60   }
61 


62   // base is the address following the header.
63   HeapWord* base() const;
64 
65   // Accessing
66   oop obj_at(int index) const;

67 
68   void obj_at_put(int index, oop value);
69 
70   oop replace_if_null(int index, oop exchange_value);
71 
72   // Sizing
73   size_t object_size()        { return object_size(length()); }
74 
75   static size_t object_size(int length) {
76     // This returns the object size in HeapWords.
77     size_t asz = (size_t)length * heapOopSize;
78     size_t size_words = heap_word_size(base_offset_in_bytes() + asz);
79     size_t osz = align_object_size(size_words);
80     assert(osz < max_jint, "no overflow");
81     return osz;
82   }
83 
84   Klass* element_klass();
85 
86 public:
87   // special iterators for index ranges, returns size of object
88   template <typename OopClosureType>
89   void oop_iterate_range(OopClosureType* blk, int start, int end);
90 };
91 
92 // See similar requirement for oopDesc.
93 static_assert(std::is_trivially_default_constructible<objArrayOopDesc>::value, "required");
94 
95 #endif // SHARE_OOPS_OBJARRAYOOP_HPP

42   friend class psPromotionManager;
43   friend class CSetMarkWordClosure;
44   friend class Continuation;
45   template <typename T>
46   friend class RawOopWriter;
47   friend class AOTMapLogger;
48 
49   template <class T> T* obj_at_addr(int index) const;
50 
51   template <class T>
52   static ptrdiff_t obj_at_offset(int index) {
53     return base_offset_in_bytes() + sizeof(T) * index;
54   }
55 
56  public:
57   // Returns the offset of the first element.
58   static int base_offset_in_bytes() {
59     return arrayOopDesc::base_offset_in_bytes(T_OBJECT);
60   }
61 
62   inline static objArrayOop cast(oop o);
63 
64   // base is the address following the header.
65   HeapWord* base() const;
66 
67   // Accessing
68   oop obj_at(int index) const;
69   oop obj_at(int index, TRAPS) const;
70 
71   void obj_at_put(int index, oop value);
72   void obj_at_put(int index, oop value, TRAPS);













73 
74   Klass* element_klass();
75 
76 public:
77   // special iterators for index ranges, returns size of object
78   template <typename OopClosureType>
79   void oop_iterate_range(OopClosureType* blk, int start, int end);
80 };
81 
82 // See similar requirement for oopDesc.
83 static_assert(std::is_trivially_default_constructible<objArrayOopDesc>::value, "required");
84 
85 #endif // SHARE_OOPS_OBJARRAYOOP_HPP
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