Paul Gilmartin wrote:
What is IBM's rationale for supporting the deprecated usleep but not
POSIX nanosleep on z/OS?
https://pubs.opengroup.org/onlinepubs/9699919799/functions/nanosleep.html#tag_16_350
And providing the idiosyncratic cond_timed_wait.
-- gil
We added nanosleep() to the Dignus runtime library, and as IBM's
documentation
suggests, it uses the BPX cond_timed_wait function (there's a note there
saying you
can use BPX cond_timed_wait to implement nanosleep.)
So - it would be pretty easy to add your own nanosleep if you want, just
call
cond_timed_wait as IBM says.
nanosleep() is "newer" than the original POSIX-1, so I suppose until
some customer
submits an RFE for it it won't appear in the IBM C library. It's also
part of the REALTIME
section of POSIX, which IBM doesn't support.
https://pubs.opengroup.org/onlinepubs/009695399/functions/nanosleep.html
z/OS doesn't really let you do the REALTIME timers (yet, I suppose), but
this function
is so handy and so common we added it to our runtime.
And, in fact, our usleep() just invokes nanosleep() as is now common on
many implementations.
- Dave R. -
--
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