Re: Timers in application

[dennison@telepath.com]

In article <375D1E02.8F1C0D6E@res.raytheon.com>,
  askeya <askeya@res.raytheon.com> wrote:
> I am developing a Solaris 2.6 application (Ada95 with Apex) that needs
a
> timer service that allows me to schedule multiple simultaneous
wakeups.
> I have looked at "setitimer" and "alarm" man pages, but these services
> appear to only allow one timer per process and/or thread.  Is this
> correct?
>
> I have read some postings about Posix timers, but can not figure out
any
> key words to use for man pages.  Will Posix timers allow multiple
> simultaneous timers?  If so, what man pages can I look at?
>
> Any other ideas for timer services I can use?  I need a granularity of
> at least 100 milliseconds, but faster would be better.  I am
developing
> in Ada95 but can create interfaces into standard C libs if necessary.

Odd, you are asking an OS question in an Ada newsgroup, but I may yet
have an Ada answer for you.

What's wrong with the "delay until" statement? Does your compiler not
support the real-time annex (D)? We are using "delay until" for
scheduling on a flight simulator, parts of which run at 2KHz (every 500
*micro*seconds) which we intend to FAA certify. I'd be quite shocked if
your compiler couldn't deliver a granularity better then 100
milliseconds.

If your compiler can't do that for you, I suggest you switch to one that
does. In the long run it will be way cheaper than playing with
non-portable OS calls.

--
T.E.D.


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