Pops data from the this.
use timeout_pop_unlocked.
If the queue is empty, blocks until end_time or until data becomes available.
If no data is received before end_time, null is returned.
To easily calculate end_time, a combination of get_real_time and
add can be used.
This function must be called while holding the this's lock.
| this | |
| end_time |
a TimeVal, determining the final time |
|
data from the queue or null, when no data is received before |