/**
* Used to mark boot image objects during a parallel scan of objects during GC Returns true if
* marking was done.
*/
private static boolean testAndMark(ObjectReference object, Word value) throws InlinePragma {
Word oldValue;
do {
oldValue = ObjectModel.prepareAvailableBits(object);
Word markBit = oldValue.and(GC_MARK_BIT_MASK);
if (markBit.EQ(value)) return false;
} while (!ObjectModel.attemptAvailableBits(object, oldValue, oldValue.xor(GC_MARK_BIT_MASK)));
return true;
}
@Inline
@NoNullCheck
@Unpreemptible
public static void inlineUnlockHelper(Object o, Offset lockOffset) {
Word old = Magic.prepareWord(o, lockOffset); // FIXME: bad for PPC?
Word id = old.and(TL_THREAD_ID_MASK.or(TL_STAT_MASK));
Word tid = Word.fromIntSignExtend(RVMThread.getCurrentThread().getLockingId());
if (id.EQ(tid)) {
if (!old.and(TL_LOCK_COUNT_MASK).isZero()) {
setDedicatedU16(o, lockOffset, old.minus(TL_LOCK_COUNT_UNIT));
return;
}
} else if (old.xor(tid).rshl(TL_LOCK_COUNT_SHIFT).EQ(TL_STAT_THIN.rshl(TL_LOCK_COUNT_SHIFT))) {
Magic.sync();
if (Magic.attemptWord(o, lockOffset, old, old.and(TL_UNLOCK_MASK).or(TL_STAT_THIN))) {
return;
}
}
unlock(o, lockOffset);
}