Is Logger thread safe?

Hi, in my program I use threads and a Logger instante accessible from
any
thread. Must I do something to make the Logger thread safe?

I’ve looked at the Logger code and it seems that it uses Mutex in some
methods
and does a:
require ‘monitor’

Is then Logger class thread safe and I can call its methods
(@logger.debug…)
from any thread in parallel safely?

Thanks.