On Wed, Feb 10, 2021, 10:53 AM Sebastian Huber < sebastian.hu...@embedded-brains.de> wrote:
> On 10/02/2021 17:47, Joel Sherrill wrote: > > > > > > > On Wed, Feb 10, 2021, 10:30 AM Sebastian Huber > > <sebastian.hu...@embedded-brains.de > > <mailto:sebastian.hu...@embedded-brains.de>> wrote: > > > > On 10/02/2021 07:53, Sebastian Huber wrote: > > > > > Hello, > > > > > > I try to update the clock manager documentation and noticed that > > there > > > is no time zone specified for the RTEMS epoch. In the timecounter > > > initialization we use: > > > > > > static struct timehands th0 = { > > > [...] > > > #ifdef __rtems__ > > > .th_bintime = { .sec = TOD_SECONDS_1970_THROUGH_1988 }, > > > .th_microtime = { TOD_SECONDS_1970_THROUGH_1988, 0 }, > > > .th_nanotime = { TOD_SECONDS_1970_THROUGH_1988, 0 }, > > > .th_boottime = { .sec = TOD_SECONDS_1970_THROUGH_1988 - 1 }, > > > #endif /* __rtems__ */ > > > > > > [...] > > > > > > }; > > > > > > Since Unix epoch is 1970-01-01T00:00:00Z, this basically defines > > that > > > the RTEMS epoch is 1988-01-01T00:00:00Z. Should this be documented? > > > The current implementation also implies that the time reported by > > > RTEMS is in UTC (modulo leap seconds). > > > > I tried to document the clocks provided by RTEMS, see tail of > > (glossary.rst): > > > > https://lists.rtems.org/pipermail/devel/2021-February/064451.html > > <https://lists.rtems.org/pipermail/devel/2021-February/064451.html> > > > > > > Is it sufficient to reference the epoch entry in various clock get > > time method pages? > The relevant epoch and clock is now referenced in the directives. > > > > And should there be discussion somewhere about TZ environment variable > > and the methods in newlib which account for that. > I think a time zone is simply not accounted for in the RTEMS Classic > API. With the setting above I guess the time zone is fixed to UTC. > By default clock_gettime is also UTC. You have to go through the C Library time methods to get timezones > > -- > embedded brains GmbH > Herr Sebastian HUBER > Dornierstr. 4 > 82178 Puchheim > Germany > email: sebastian.hu...@embedded-brains.de > phone: +49-89-18 94 741 - 16 > fax: +49-89-18 94 741 - 08 > > Registergericht: Amtsgericht München > Registernummer: HRB 157899 > Vertretungsberechtigte Geschäftsführer: Peter Rasmussen, Thomas Dörfler > Unsere Datenschutzerklärung finden Sie hier: > https://embedded-brains.de/datenschutzerklaerung/ > >
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