WAIT_EVENT_TIMEOUT(9) Driver Basics WAIT_EVENT_TIMEOUT(9)NAMEwait_event_timeout - sleep until a condition gets true or a timeout
elapses
SYNOPSIS
wait_event_timeout(wq, condition, timeout);
ARGUMENTS
wq
the waitqueue to wait on
condition
a C expression for the event to wait for
timeout
timeout, in jiffies
DESCRIPTION
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, or the remaining jiffies
(at least 1) if the condition evaluated to true before the timeout
elapsed.
COPYRIGHTKernel Hackers Manual 3.11 November 2013 WAIT_EVENT_TIMEOUT(9)