Year 2038 problem

Sebastian Huber sebastian.huber at embedded-brains.de
Wed Aug 17 11:34:10 CDT 2011


Thanks Joel for the hints.  What is the name of the wiki page?

On 08/17/2011 04:53 PM, Joel Sherrill wrote:
> The answer somwhat depends on the version but for recent versions this email will cover the basics:
>
> + libc time types.. you got this one. We would have to change to unsigned (if OK) or 64 bits
> + super core tod has two representations. Now the default is struct timespec with time_t issues. There is an alternative choice there which is 64 bits since posix epoch. That one is valid for about 500 years.
>
> The internal 64 bit tod representation benchmarked the same on the cpus I checked but we have never gotten buy in for switching to it. It could be switched easily if we agree. All code is there and I intended to allow ports to pick the representation that was best for them.
>
> I wrote up all of the time overflow issues year ago. It is the wiki. If it isn't clear or missed something, ask
>
> --joel
>
> Sebastian Huber<sebastian.huber at embedded-brains.de>  wrote:
>
>> Hello,
>>
>> since time_t is usually defined as long in Newlib and thus 32-bit on most RTEMS
>> targets, we are affected by the year 2038 problem:
>>
>> http://en.wikipedia.org/wiki/Year_2038_problem
>>
>> Has someone already thought about this?
>>
>> We have a system that should operate for 30 years.  Has someone already
>> analyzed if RTEMS can run that long, e.g. which variables may overflow?
>>
>> Kind regards,
>> 	Sebastian
>>
>> --
>> Sebastian Huber, embedded brains GmbH
>>
>> Address : Obere Lagerstr. 30, D-82178 Puchheim, Germany
>> Phone   : +49 89 18 90 80 79-6
>> Fax     : +49 89 18 90 80 79-9
>> E-Mail  : sebastian.huber at embedded-brains.de
>> PGP     : Public key available on request.
>>
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-- 
Sebastian Huber, embedded brains GmbH

Address : Obere Lagerstr. 30, D-82178 Puchheim, Germany
Phone   : +49 89 18 90 80 79-6
Fax     : +49 89 18 90 80 79-9
E-Mail  : sebastian.huber at embedded-brains.de
PGP     : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.



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