- unsigned long __sched wait_for_completion_timeout(struct completion * x, unsigned long timeout);
- holds the state of this particular completion
- timeout value in jiffies
This waits for either a completion of a specific task to be signaled or for a specified timeout to expire. The timeout is in jiffies. It is not interruptible.
The return value is 0 if timed out, and positive (at least 1, or number of jiffies left till timeout) if completed.