The main threads call to `csLocker.unlock();` may cause an allocation which may trigger a GC. This can lead to a deadlock because we have a native thread which is waiting on a signal from the main thread (which is sent in `csLocker.unlock()`) to `ReleasePrimitiveArrayCritical`. Without the call to ReleasePrimitiveArrayCritical the some GCs may be blocked.

I suggest we remove the dependency on a java thread for the `GetPrimitiveArrayCritical` / `ReleasePrimitiveArrayCritical` pair. And simply do the lock and the sleep inside native.