[ace-users] gettimeofday() and schedule

[Steve Huston]

Hi guys,

There's code to show this in ACE_wrappes/tests/Tiemr_Queue_Test.cpp as
well.

Good luck,
-Steve

--
Steve Huston, Riverace Corporation
Would you like ACE to run great on your platform?
See http://www.riverace.com/sponsor.htm


> -----Original Message-----
> From: Douglas C. Schmidt [mailto:schmidt at dre.vanderbilt.edu] 
> Sent: Wednesday, August 22, 2007 10:12 AM
> To: scott.reeve at verizon.net; ace-users at cse.wustl.edu; 
> shuston at riverace.com
> Subject: Re: gettimeofday() and schedule
> 
> 
> Hi Scott,
> 
> To ensure that we have proper version/platform/compiler information,
> please make sure you fill out the appropriate problem report form
> (PRF), which is in
> 
> $ACE_ROOT/PROBLEM-REPORT-FORM
> $TAO_ROOT/PROBLEM-REPORT-FORM
> 
> or in
> 
> $ACE_ROOT/BUG-REPORT-FORM
> $TAO_ROOT/BUG-REPORT-FORM
> 
> in older versions of ACE+TAO.  Make sure to include this information
> when asking any questions about ACE+TAO since otherwise we have to
> "guess" what version/platform/compiler/options you've using, which
is
> very error-prone and slows down our responsiveness.  If you don't
use
> the PRF, therefore, it is less likely that someone from the core
> ACE+TAO developer team will be able to answer your question.
> Naturally, we encourage and appreciate other members of the ACE+TAO
> user community who can respond to questions that they have the
answers
> to.
> 
> >I'm using the following code:
> >
> > ACE_Time_Value expireAt = timerQueue().gettimeofday () + delay;
> > timerQueue().schedule(eventHandler, arg, expireAt);
> >
> >The delay is set to 2 seconds.
> >
> >So this works fine - the timer fires every two seconds and 
> the routine
> >is called.
> >
> >The problem is that when the system's time is changed to go
backward
> >(with the "date" command in linux) the timer always has that 
> much more
> >delay in it.  E.g: if I set the time back 30 seconds, the next
> >expiration will be 32 seconds, and then 2 after that.
> >
> >Is there any routine I can call in ACE to do the same thing but
have
> >it automatically adjust to the system clock's change - i.e.
continue
> >expiring every two seconds if if the system's time is changed.
> 
> Please check out ACE_High_Res_Timer::gettimeofday_hr.  There's a
> discussion of this in a sidebar in Chapter 3 of C++NPv2
> <www.cs.wustl.edu/~schmidt/ACE/book2/>.  Steve, do you have any
other
> suggestions here?
> 
> Thanks,
> 
>         Doug
> -- 
> Dr. Douglas C. Schmidt                       Professor and 
> Associate Chair
> Electrical Engineering and Computer Science  TEL: (615) 343-8197
> Vanderbilt University                        WEB: 
> www.dre.vanderbilt.edu/~schmidt
> Nashville, TN 37203                          NET: 
> d.schmidt at vanderbilt.edu
>