@Inline
@NoNullCheck
@Unpreemptible
public static void inlineLockHelper(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)) {
Word changed = old.plus(TL_LOCK_COUNT_UNIT);
if (!changed.and(TL_LOCK_COUNT_MASK).isZero()) {
setDedicatedU16(o, lockOffset, changed);
return;
}
} else if (id.EQ(TL_STAT_THIN)) {
// lock is thin and not held by anyone
if (Magic.attemptWord(o, lockOffset, old, old.or(tid))) {
Magic.isync();
return;
}
}
lock(o, lockOffset);
}
