wait_event_interruptible — sleep until a condition gets true
wait_event_interruptible ( | wq, |
condition); |
The process is put to sleep (TASK_INTERRUPTIBLE) until the
condition evaluates to true or a signal is received.
The 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.
The function will return -ERESTARTSYS if it was interrupted by a
signal and 0 if condition evaluated to true.