57
58 inline narrowKlass Klass::encode_klass(Klass* v) {
59 return is_null(v) ? (narrowKlass)0 : encode_klass_not_null(v);
60 }
61
62 inline Klass* Klass::decode_klass_not_null(narrowKlass v) {
63 assert(!is_null(v), "narrow klass value can never be zero");
64 int shift = Universe::narrow_klass_shift();
65 Klass* result = (Klass*)(void*)((uintptr_t)Universe::narrow_klass_base() + ((uintptr_t)v << shift));
66 assert(check_klass_alignment(result), "address not aligned: " INTPTR_FORMAT, p2i((void*) result));
67 return result;
68 }
69
70 inline Klass* Klass::decode_klass(narrowKlass v) {
71 return is_null(v) ? (Klass*)NULL : decode_klass_not_null(v);
72 }
73
74 inline bool Klass::decode_ptr_is_value_based(narrowKlass v) {
75 return (v & Universe::oop_metadata_odd_mask()) != 0;
76 }
77 inline bool Klass::ptr_is_value_based(Klass* v) {
78 return ((uintptr_t)v & Universe::oop_metadata_odd_mask()) != 0;
79 }
80
81
82 template <typename T>
83 bool Klass::is_instanceof_or_null(T element) {
84 if (oopDesc::is_null(element)) {
85 return true;
86 }
87 oop obj = oopDesc::decode_heap_oop_not_null(element);
88 return obj->klass()->is_subtype_of(this);
89 }
90
91 #endif // SHARE_VM_OOPS_KLASS_INLINE_HPP
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57
58 inline narrowKlass Klass::encode_klass(Klass* v) {
59 return is_null(v) ? (narrowKlass)0 : encode_klass_not_null(v);
60 }
61
62 inline Klass* Klass::decode_klass_not_null(narrowKlass v) {
63 assert(!is_null(v), "narrow klass value can never be zero");
64 int shift = Universe::narrow_klass_shift();
65 Klass* result = (Klass*)(void*)((uintptr_t)Universe::narrow_klass_base() + ((uintptr_t)v << shift));
66 assert(check_klass_alignment(result), "address not aligned: " INTPTR_FORMAT, p2i((void*) result));
67 return result;
68 }
69
70 inline Klass* Klass::decode_klass(narrowKlass v) {
71 return is_null(v) ? (Klass*)NULL : decode_klass_not_null(v);
72 }
73
74 inline bool Klass::decode_ptr_is_value_based(narrowKlass v) {
75 return (v & Universe::oop_metadata_odd_mask()) != 0;
76 }
77
78 inline bool Klass::ptr_is_value_based(Klass* v) {
79 return ((uintptr_t)v & Universe::oop_metadata_odd_mask()) != 0;
80 }
81
82
83 template <typename T>
84 bool Klass::is_instanceof_or_null(T element) {
85 if (oopDesc::is_null(element)) {
86 return true;
87 }
88 oop obj = oopDesc::decode_heap_oop_not_null(element);
89 return obj->klass()->is_subtype_of(this);
90 }
91
92 #endif // SHARE_VM_OOPS_KLASS_INLINE_HPP
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