Re: [Playerstage-users] Actarray driver problem

[Toby C. <tco...@pl...>]

Make sure the function signature for ProcessMessage is correct, it no 
longer takes a MessageQueue * instead it takes a QueuePointer &

See here for more details, and please update the page with any other 
changes you need that have been missed.
http://playerstage.sourceforge.net/wiki/Player_2.1_Upgrade


Toby

Jenn and Alan Atherton wrote:
> Ah, I did not remember.  Now that roadblock is out of the way, but now 
> the program never processes messages.  In my main thread, I am calling:
>
>     if(!InQueue->Empty()){
>         ProcessMessages();
>     }
>
> Where ProcessMessages has a series of MatchMessage calls.
> Has anything changed related to this that I need to know?  Is there 
> somewhere I can look (mailing list archives?) for significant changes 
> from 2.0 to 2.1?
>
> Thanks for your help,
> J. Alan Atherton
>
>
> On Fri, Feb 22, 2008 at 7:58 PM, Geoffrey Biggs <gb...@ki... 
> <mailto:gb...@ki...>> wrote:
>
>     Have you remembered to allocate memory for actdata.actuators?
>     Player 2.1
>     (which includes the CVS version) uses dynamically allocated memory for
>     all arrays in the interfaces.
>
>     Geoff
>
>     Jenn and Alan Atherton wrote:
>     > I have written a driver for the LynxArm, and it worked swell
>     with Player
>     > 2.0.4.  I have moved to Player CVS, as I need Gazebo SVN.  I'm
>     stumped
>     > with a problem that I've picked at for over a week now.  The
>     driver goes
>     > through the Setup method just fine, and enters the main thread.
>     >
>     > The first time through the main thread, as the code populates a
>     > player_actarray_data structure, it apparently freezes
>     completely.  Here
>     > is the code snippet in question, with debugging stuff in place.
>     >
>     >         writeLog("Gathering Axis Pos %d\n", i);
>     >         float bob = arm.getAxisAngleDeg(i) * DEG_TO_RAD;
>     >         writeLog("Gathering Axis Pos %d %1.2f\n", i, bob);
>     >
>     >         actdata.actuators[i].position = bob;
>     > // The code never reaches the line below
>     >         writeLog("Gathering Axis State %d\n", i);
>     >
>     >
>     > The writeLog method opens a log file, appends the string, then
>     closes
>     > the file.  It seems to be hanging up on any line that has actdata in
>     > it.  I am completely stumped with this.
>     >
>     > Here's some info that might be useful to someone who knows.
>     > My lynx arm accessor class uses pthreads.
>     > I create an actarray interface and a limb interface.
>     > I publish a state message in the main thread (although it is never
>     > reached in this case), and that is all.
>     >
>     > I will appreciate any advice given in general.
>     >
>     > Eventually, when this is working, I can contribute the code to the
>     > project.  I am also making a gazebo model for the arm.
>     >
>     > Thanks,
>     > J. Alan Atherton
>
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