WAIT_EVENT_INTERRUPT

Section: Driver Basics (9)
Updated: February 2011
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NAME

wait_event_interruptible_timeout - sleep until a condition gets true or a timeout elapses  

SYNOPSIS

wait_event_interruptible_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_INTERRUPTIBLE) until the condition evaluates to true or a signal is received. 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, -ERESTARTSYS if it was interrupted by a signal, and the remaining jiffies otherwise if the condition evaluated to true before the timeout elapsed.  

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