[U-Boot] [PATCH] sandbox: Add timer simulation

[Mike Frysinger <vapier@gentoo.org>]

On Tuesday 29 November 2011 04:35:06 Matthias Wei?er wrote:
> Am 28.11.2011 23:57, schrieb Mike Frysinger:
> > On Monday 28 November 2011 16:40:29 Matthias Weisser wrote:
> >> Making sleep command work
> > 
> > i like the idea, but using clock_xxx funcs makes me sad (generally
> > requires a "newerish" glibc and -lrt).  my only alternative proposal is
> > to use usec's with gettimeofday ... maybe that's good enough ?  although
> > we'll probably need to add nsec support eventually anyways for the newer
> > timer code ...
> 
> I would like to stay with clock_gettime(CLOCK_MONOTONIC, ...) as the
> value isn't subjected to change when wall time is changed. Still there
> are chances to get wrong (non monotonic) values when NTP adjusts
> frequencies. Maybe some ifdef magic can be used to even use
> CLOCK_MONOTONIC_RAW if it is available and fall back to gettimeofday in
> case of older systems. The only thing would be then -lrt on the linker
> command line which has to be sorted out somehow.

i think atm, we're focusing on sandbox working on Linux/glibc hosts.  we're 
not *too* worried about portability atm.  we can worry about that once sandbox 
is more than just a PoC toy :).
-mike
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