Databases and multithreading

To make the database modules thread safe, I think there are changes with persistent connection handling required: Currently only one identical connection per process is allowed - attempting to pconnect with the same parameters will return the previously established connection out of the plist. If I got things right, we end up with several threads using the same single connection. Besides the fact, that this is not what we want (a single db connection) there will be multiple threads trying to execute quasi simultaneous queries on the same connection... So we need some kind of mutexing for pconnetions: The connection handle returned from pconnect() mustn't be available for other threads until explicitly released (via close()) or implicitly released on request shutdown. Non persistent connections should be ok, since they are kept in a per thread resource list. Any opinions on this from more "threaded" people? -Andreas