예제 #1
0
inline oop oopDesc::atomic_compare_exchange_oop(oop exchange_value,
                                                volatile HeapWord *dest,
                                                oop compare_value) {
  if (UseCompressedOops) {
    // encode exchange and compare value from oop to T
    narrowOop val = encode_heap_oop(exchange_value);
    narrowOop cmp = encode_heap_oop(compare_value);

    narrowOop old = (narrowOop) Atomic::cmpxchg(val, (narrowOop*)dest, cmp);
    // decode old from T to oop
    return decode_heap_oop(old);
  } else {
    return (oop)Atomic::cmpxchg_ptr(exchange_value, (oop*)dest, compare_value);
  }
}
void oopDesc::set_klass_to_list_ptr(oop k) {
  // This is only to be used during GC, for from-space objects, so no
  // barrier is needed.
  if (UseCompressedClassPointers) {
    _metadata._compressed_klass = (narrowKlass)encode_heap_oop(k);  // may be null (parnew overflow handling)
  } else {
    _metadata._klass = (Klass*)(address)k;
  }
}
예제 #3
0
inline void oopDesc::set_klass_to_list_ptr(oop k) {
  // This is only to be used during GC, for from-space objects, so no
  // barrier is needed.
  if (UseCompressedOops) {
    _metadata._compressed_klass = encode_heap_oop(k);  // may be null (parnew overflow handling)
  } else {
    _metadata._klass = (klassOop)k;
  }
}
예제 #4
0
inline void oopDesc::release_encode_store_heap_oop(
                                                volatile narrowOop* p, oop v) {
  OrderAccess::release_store(p, encode_heap_oop(v));
}
예제 #5
0
// Encode and store a heap oop allowing for null.
inline void oopDesc::encode_store_heap_oop(narrowOop* p, oop v) {
  *p = encode_heap_oop(v);
}