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WAIT_EVENT_TIMEOUT(9) Driver Basics WAIT_EVENT_TIMEOUT(9)

NAME

wait_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.

COPYRIGHT

March 2016 Kernel Hackers Manual 3.2.