[Boost-users] [asio] Thread safety

Hi, I have a thread that runs io_service::run(). I have another thread that creates a timer and schedules it to fire later. Once the timer has been scheduled, the second thread forgets about it and everything is handled by the thread that runs the service. Is it safe to create/schedule a timer with an io_service from a thread while this services is being run in another thread? Thank you for your replies, Laurent