Re: candidate sched.h and sys/sched.h for review

[Eric Blake <eblake at redhat dot com>]

On 03/31/2010 10:51 AM, Ralf Corsepius wrote:
> On 03/31/2010 06:45 PM, Eric Blake wrote:
>> On 03/31/2010 10:31 AM, Ralf Corsepius wrote:
>>   
>>>> sched.h includes sys/types.h (which defines timespec)
>>>>
>>>>        
>>> SUSv4 mandates timespec in<time.h>  and sys/sched.h to receive it from
>>> <time.h>.
>>>      
>> SUSv4 does not mandate<sys/sched.h>.
> Correct, a stupid typo on my part. I was referring to <sched.h>

That said...

SUSv4 mandates that <sched.h> provides struct timespec as in <time.h>,
and permits (but does not require) <sched.h> to include <time.h> as a
means of meeting that mandate.  However, it is also possible for both
<time.h> and <sched.h> to include yet another (implementation-specific)
header (in this cased, <sys/sched.h>) to provide a consistent definition
of struct timespec, without <sched.h> having to pull in anything from
<time.h>.

-- 
Eric Blake   eblake@redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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