54 assert(decode_klass(result) == v, "reversibility"); 55 return (narrowKlass)result; 56 } 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 template <typename T> 75 bool Klass::is_instanceof_or_null(T element) { 76 if (oopDesc::is_null(element)) { 77 return true; 78 } 79 oop obj = oopDesc::decode_heap_oop_not_null(element); 80 return obj->klass()->is_subtype_of(this); 81 } 82 83 #endif // SHARE_VM_OOPS_KLASS_INLINE_HPP | 54 assert(decode_klass(result) == v, "reversibility"); 55 return (narrowKlass)result; 56 } 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 #endif // SHARE_VM_OOPS_KLASS_INLINE_HPP |