schedule_hrtimeout_range — sleep until timeout
int __sched schedule_hrtimeout_range ( | ktime_t * expires, |
| unsigned long delta, | |
const enum hrtimer_mode mode); |
expirestimeout value (ktime_t)
deltaslack in expires timeout (ktime_t)
modetimer mode, HRTIMER_MODE_ABS or HRTIMER_MODE_REL
Make the current task sleep until the given expiry time has
elapsed. The routine will return immediately unless
the current task state has been set (see set_current_state).
The delta argument gives the kernel the freedom to schedule the
actual wakeup to a time that is both power and performance friendly.
The kernel give the normal best effort behavior for “expires+delta”,
but may decide to fire the timer earlier, but no earlier than expires.
You can set the task state as follows -
TASK_UNINTERRUPTIBLE - at least timeout time is guaranteed to
pass before the routine returns.
TASK_INTERRUPTIBLE - the routine may return early if a signal is
delivered to the current task.
The current task state is guaranteed to be TASK_RUNNING when this routine returns.
Returns 0 when the timer has expired otherwise -EINTR