Yes, this is the approach I decided to take. Another issue it solves is that my component needs to be reconfigured several times during it´s lifetime. At first I thought of unloading it and reloading it every time, but this would in time consume al the HAL shared memory. Now I will create the realtime module on startup, and then load the userspace configuration module when I need to reconfigure the realtime part. Thanks again
> Date: Fri, 13 Dec 2013 08:45:23 -0500 > To: emc-developers@lists.sourceforge.net > From: kenneth.ler...@se-ltd.com > Subject: Re: [Emc-developers] Question with New realtime HAL Component > > On 12/12/2013 6:10 PM, Lisandro Massera wrote: > > I´m trying to create a new Realtime Hal Component which should open a > > configuration file when it is loaded. The configuration file should be > > specified in the loadrt command. Is this possible? Does anyone know of > > another component that does this, so as to see how it is made? > > Thanks for the advice. > > Lisandro Massera > > ------------------------------------------------------------------------------ > > Rapidly troubleshoot problems before they affect your business. Most IT > > organizations don't have a clear picture of how application performance > > affects their revenue. With AppDynamics, you get 100% visibility into your > > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics > > Pro! > > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk > > _______________________________________________ > > Emc-developers mailing list > > Emc-developers@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-developers > Well, those of us who have read ahead and followed the links, know that > it can be done and why it shouldn't be done. I'd like to suggest an > alternative. Use shared memory. > > On initialization, read and parse the file in user space and create the > appropriate data structures in shared memory. Then, sometime after it > has been loaded, the hal module can be flagged (I'm not sure how -- look > at a pin, perhaps) to "read" the shared memory. > > I believe that this circumvents the issues of actually reading the file > from the kernel. The user space program can determine where the file is. > The user space program can use as much memory as it wants, and can even > crash and burn without taking the system down. > > Perhaps someone who has actually written a hal module and knows what he > is doing can flesh out a generic way of doing this so that anyone who > wants to use this mechanism has a clean model of how to do it. > > Regards, > > Ken > > ------------------------------------------------------------------------------ > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into your > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
