[GitHub] [incubator-nuttx] Donny9 commented on pull request #2740: sched/timer: get the previous reload value correctly

[GitBox <gi...@apache.org>]

Donny9 commented on pull request #2740:
URL: https://github.com/apache/incubator-nuttx/pull/2740#issuecomment-767276044


   > @Donny9 is this correct?
   > 
   > ```
   >  *   ovalue - A location in which to return the time remaining from the
   >  *     previous timer setting.	 *     previous timer setting.
   > ```
   > 
   > This says "time remaining" not total time.
   > 
   > time remaining make sense to me. total delay does not
   
   https://man7.org/linux/man-pages/man2/timer_settime.2.html. 
   
   If old_value is not NULL, then it points to a buffer that is used to return the previous interval of the timer (in old_value->it_interval) and the amount of time until  the  timer  would  previously have next expired (in old_value->it_value).
   
   so, we can get time remaining by old_value->it_value, get  the previous interval of the timer by old_value->it_interval. And the pt_delay records the interval time.
   


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