I'd like to use concurrent reading to one database in multiple threads. Each thread holds its own database connection to the same database file. However, my filesystem & OS supports neither posix locking neither flock system call. It looks I can only use sem locking style which means all locks are exclusive. What if I can control the reading and writing to a database won't happen at the same time, can I use "unix-none" VFS to eliminate all file locking code ? Will the concurrent reading without sqlite locking system be safe ?