| schedule_hrtimeout_range(9) - phpMan
SCHEDULE_HRTIMEOUT_R(9) Driver Basics SCHEDULE_HRTIMEOUT_R(9)
NAME
schedule_hrtimeout_range - sleep until timeout
SYNOPSIS
int __sched schedule_hrtimeout_range(ktime_t * expires, u64 delta,
const enum hrtimer_mode mode);
ARGUMENTS
expires
timeout value (ktime_t)
delta
slack in expires timeout (ktime_t)
mode
timer mode, HRTIMER_MODE_ABS or HRTIMER_MODE_REL
DESCRIPTION
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
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 SCHEDULE_HRTIMEOUT_R(9)
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