wait_event_timeout — sleep until a condition gets true or a timeout elapses
wait_event_timeout ( | wq, |
| condition, | |
timeout); |
wqthe waitqueue to wait on
conditiona C expression for the event to wait for
timeouttimeout, in jiffies
The process is put to sleep (TASK_UNINTERRUPTIBLE) until the
condition evaluates to true. 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 returns 0 if the timeout elapsed, and the remaining
jiffies if the condition evaluated to true before the timeout elapsed.