wait_event_interruptible_timeout — sleep until a condition gets true or a timeout elapses
the waitqueue to wait on
a C expression for the event to wait for
timeout, in jiffies
The process is put to sleep (TASK_INTERRUPTIBLE) until the
condition evaluates to true or a signal is received.
condition is checked each time the waitqueue
wq is woken up.
wake_up has to be called after changing any variable that could
change the result of the wait condition.