@Override
public <A> void update(long recid, A value, Serializer<A> serializer) {
if (!fullTx) throw new UnsupportedOperationException("read-only");
commitLock.readLock().lock();
try {
mod.put(recid, Fun.t2(value, serializer));
} finally {
commitLock.readLock().unlock();
}
}
@Override
public <A> long put(A value, Serializer<A> serializer) {
if (!fullTx) throw new UnsupportedOperationException("read-only");
commitLock.writeLock().lock();
try {
Long recid = preallocRecidTake();
usedPreallocatedRecids.add(recid);
mod.put(recid, Fun.t2(value, serializer));
return recid;
} finally {
commitLock.writeLock().unlock();
}
}
@Override
public <A> boolean compareAndSwap(
long recid, A expectedOldValue, A newValue, Serializer<A> serializer) {
if (!fullTx) throw new UnsupportedOperationException("read-only");
commitLock.readLock().lock();
try {
Lock lock = locks[Store.lockPos(recid)].writeLock();
lock.lock();
try {
A oldVal = getNoLock(recid, serializer);
boolean ret = oldVal != null && oldVal.equals(expectedOldValue);
if (ret) {
mod.put(recid, Fun.t2(newValue, serializer));
}
return ret;
} finally {
lock.unlock();
}
} finally {
commitLock.readLock().unlock();
}
}