How do multiple processes/threads handle access to an underlying sqlite database?

[mainrs]

I have a program that spawns 8 threads to work on I/O bound tasks. To keep track on what has been worked on and its results, I use a sqlite database.

AFAIK, write access is locked in sqlite. I was wondering how read access is managed. Can all those 8 threads read simultaneously from the database file without locking?

My tasks are split into two phases: collection and processing. Only collection requires writing. Processing is fully parallel.