typeArrayKlass.hpp revision 1879:f95d63e2154a 
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24
25#ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
26#define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
27
28#include "oops/arrayKlass.hpp"
29
30// A typeArrayKlass is the klass of a typeArray
31// It contains the type and size of the elements
32
33class typeArrayKlass : public arrayKlass {
34  friend class VMStructs;
35 private:
36  jint _max_length;            // maximum number of elements allowed in an array
37 public:
38  // instance variables
39  jint max_length()                     { return _max_length; }
40  void set_max_length(jint m)           { _max_length = m;    }
41
42  // testers
43  bool oop_is_typeArray_slow() const    { return true; }
44
45  // klass allocation
46  DEFINE_ALLOCATE_PERMANENT(typeArrayKlass);
47  static klassOop create_klass(BasicType type, int scale, const char* name_str,
48                               TRAPS);
49  static inline klassOop create_klass(BasicType type, int scale, TRAPS) {
50    return create_klass(type, scale, external_name(type), CHECK_NULL);
51  }
52
53  int oop_size(oop obj) const;
54  int klass_oop_size() const  { return object_size(); }
55
56  bool compute_is_subtype_of(klassOop k);
57
58  // Allocation
59  typeArrayOop allocate(int length, TRAPS);
60  typeArrayOop allocate_permanent(int length, TRAPS);  // used for class file structures
61  oop multi_allocate(int rank, jint* sizes, TRAPS);
62
63  // Copying
64  void  copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
65
66  // Iteration
67  int oop_oop_iterate(oop obj, OopClosure* blk);
68  int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
69
70  // Garbage collection
71  void oop_follow_contents(oop obj);
72  int  oop_adjust_pointers(oop obj);
73
74  // Parallel Scavenge and Parallel Old
75  PARALLEL_GC_DECLS
76
77 protected:
78  // Find n'th dimensional array
79  virtual klassOop array_klass_impl(bool or_null, int n, TRAPS);
80
81  // Returns the array class with this class as element type
82  virtual klassOop array_klass_impl(bool or_null, TRAPS);
83
84 public:
85  // Casting from klassOop
86  static typeArrayKlass* cast(klassOop k) {
87    assert(k->klass_part()->oop_is_typeArray_slow(), "cast to typeArrayKlass");
88    return (typeArrayKlass*) k->klass_part();
89  }
90
91  // Naming
92  static const char* external_name(BasicType type);
93
94  // Sizing
95  static int header_size()  { return oopDesc::header_size() + sizeof(typeArrayKlass)/HeapWordSize; }
96  int object_size() const   { return arrayKlass::object_size(header_size()); }
97
98  // Initialization (virtual from Klass)
99  void initialize(TRAPS);
100
101 private:
102   // Helpers
103   static klassOop array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS);
104
105#ifndef PRODUCT
106 public:
107  // Printing
108  void oop_print_on(oop obj, outputStream* st);
109#endif
110 public:
111  const char* internal_name() const;
112};
113
114#endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
115