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SCHEDULE_TIMEOUT(9) Driver Basics SCHEDULE_TIMEOUT(9)
NAME
schedule_timeout - sleep until timeout
SYNOPSIS
signed long __sched schedule_timeout(signed long timeout);
ARGUMENTS
timeout
timeout value in jiffies
DESCRIPTION
Make the current task sleep until timeout jiffies have elapsed. The
routine will return immediately unless the current task state has been
set (see set_current_state).
You can set the task state as follows -
TASK_UNINTERRUPTIBLE - at least timeout jiffies are guaranteed to pass
before the routine returns. The routine will return 0
TASK_INTERRUPTIBLE - the routine may return early if a signal is
delivered to the current task. In this case the remaining time in
jiffies will be returned, or 0 if the timer expired in time
The current task state is guaranteed to be TASK_RUNNING when this
routine returns.
Specifying a timeout value of MAX_SCHEDULE_TIMEOUT will schedule the
CPU away without a bound on the timeout. In this case the return value
will be MAX_SCHEDULE_TIMEOUT.
In all cases the return value is guaranteed to be non-negative.
COPYRIGHT
Kernel Hackers Manual 2.6. November 2013 SCHEDULE_TIMEOUT(9)
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