[BRLTTY] getimeofday and rdate?

[Dave Mielke]

[quoted lines by Samuel Thibault on 2007/09/09 at 21:13 +0200]

>Mario Lang, le Sun 09 Sep 2007 20:51:54 +0200, a écrit :
>> When I run "rdate" to resync my computers clock with some internet
>> time server, it can happen that brltty stops to interact with my display for
>> a certain period of time.
>
>Unfortunately, this is a know problem with gettimeofday() and such
>adjusting programs. For small clock shifts, rdate should use adjtime for
>getting a smooth shift. For bigger shifts, gettimeofday() indeed gets
>shifted.

What if we make asyncWait() quit if it calculates a negative elapsed time? That 
particular wait will be a bit shorter, but the refresh loop should reset after 
that. Scheduled events like driver restart attempts wouldn't occur for a while, 
but the main loop should be okay. Is that sufficient?

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