private <A> A getNoLock(long recid, Serializer<A> serializer) {
if (fullTx) {
Fun.Tuple2 tu = mod.get(recid);
if (tu != null) {
if (tu.a == TOMBSTONE) return null;
return (A) tu.a;
}
}
Object oldVal = old.get(recid);
if (oldVal != null) {
if (oldVal == TOMBSTONE) return null;
return (A) oldVal;
}
return TxEngine.this.get(recid, serializer);
}
public void lock(final long recid) {
if (CC.LOG_LOCKS)
Utils.LOG.finest("TRYLOCK R:" + recid + " T:" + Thread.currentThread().getId());
// feel free to rewrite, if you know better (more efficient) way
if (CC.ASSERT && locks.get(recid) == Thread.currentThread()) {
// check node is not already locked by this thread
throw new InternalError("node already locked by current thread: " + recid);
}
while (locks.putIfAbsent(recid, Thread.currentThread()) != null) {
Thread.yield();
}
if (CC.LOG_LOCKS)
Utils.LOG.finest("LOCK R:" + recid + " T:" + Thread.currentThread().getId());
}
