Hello all,
I was able to further my quest in obtaining an implementation of Xerces-C for VxWorks
(thanks to Johannes at CERN) I have downloaded CERN's port and things seem to be
functioning fairly well. Thanks again Johannes.
Interestingly enough, as many programers new to Xerces have found out just like I
have, multiple calls to Initialize() and Terminate() cause problems- now don't bash me
just yet, or delete this, I think this is a new question (I looked in the archive - if
it's there then you can bash me but I couldn't find it)
but anyway it appears as if due to the way things are implemented with Xerces once you
call Terminate() you are done for that process as far as using Xerces goes, and you
won't be able to use it again. OK I understand that....
Now, on VxWorks the way the OS works is (and I'll do as good as I can here, I'm not a
guru) that it is multi-threaded, however everything is in shared memory space. SO...
basically that makes it work like one big process that has the life of the box, and
when it is rebooted/reloaded the process is unloaded. On Vx you load your code into
memory and then just make the correct refrences. For example the "prompt"/"shell" is
really just like writing code where in when you write the line, that line is run at
that moment. So you make function calls etc. from the "shell" instead of "running"
executables or programs
anyways, hopefully I explained that reasonably well...
So now the way I understand it is that I have no way to clean up Xerces and then later
reuse it, without totally reloading/rebooting my board. Because even in a new
"program" if you will I am still in the same memory space / "process space" and thus
susceptable to the Init/Terminate thing.
Hopefully that makes sense - I am notoriously good at knowing what I want to say but
not being able to articulate it well.
Does any one have any thoughts on this? Or what people on platforms like Vx should do
in such a situation. (if I am not mistaken this might be close to the load/unload
problem with DLL's in windows? again I am not a guru on that either.)
thanks again for all your input and help,
Kevin
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