1SCHEDULE_HRTIMEOUT_R(9)          Driver Basics         SCHEDULE_HRTIMEOUT_R(9)
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NAME

6       schedule_hrtimeout_range - sleep until timeout
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SYNOPSIS

9       int __sched schedule_hrtimeout_range(ktime_t * expires,
10                                            unsigned long delta,
11                                            const enum hrtimer_mode mode);
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ARGUMENTS

14       expires
15           timeout value (ktime_t)
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17       delta
18           slack in expires timeout (ktime_t)
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20       mode
21           timer mode, HRTIMER_MODE_ABS or HRTIMER_MODE_REL
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DESCRIPTION

24       Make the current task sleep until the given expiry time has elapsed.
25       The routine will return immediately unless the current task state has
26       been set (see set_current_state).
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28       The delta argument gives the kernel the freedom to schedule the actual
29       wakeup to a time that is both power and performance friendly. The
30       kernel give the normal best effort behavior for “expires+delta”, but
31       may decide to fire the timer earlier, but no earlier than expires.
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33       You can set the task state as follows -
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35       TASK_UNINTERRUPTIBLE - at least timeout time is guaranteed to pass
36       before the routine returns.
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38       TASK_INTERRUPTIBLE - the routine may return early if a signal is
39       delivered to the current task.
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41       The current task state is guaranteed to be TASK_RUNNING when this
42       routine returns.
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44       Returns 0 when the timer has expired otherwise -EINTR
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47Kernel Hackers Manual 3.10         June 2019           SCHEDULE_HRTIMEOUT_R(9)
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