This is all fine, but once you've done you will need to show how
to use it in Python and Java. I have no idea how to pass a callback
in these languages without the avail of function pointers.

It would be a good programming class (as in lecture, not in OOP...) for
us all.

Victor

At 14:58 07/12/2005, you wrote:
>Further to this, more thought says templates are not required. We just 
>need an empty C++ callback class for each Csound API callback function 
>signature, and we wrap it with SWIG "director" classes. Every language 
>that supports directors (currently, Python and Java) will then allow the 
>callback class to be subclassed in the language. The class will have a 
>member function that directly returns the static actual callback function.
>
>Regards,
>Mike
>
>-----Original Message-----
>From: Michael Gogins 
>Sent: Dec 7, 2005 9:52 AM
>To: csound-devel@lists.sourceforge.net
>Subject: Re: [Cs-dev] Java Wrapper Now Working
>
>Thanks for these changes.
>
>About the callbacks, I wonder if some C++ template metaprogramming might 
>not give us a way to code up a bunch of generic callback functors, e.g., a 
>Python-wrapped C++ class with a C callback, such that the class can be 
>subclassed in Python to handle the callback.
>
>Regards,
>Mike
>
>-----Original Message-----
>From: Istvan Varga 
>Sent: Dec 7, 2005 3:09 AM
>To: csound-devel@lists.sourceforge.net
>Subject: Re: [Cs-dev] Java Wrapper Now Working
>
>On Wednesday 07 December 2005 04:18, Steven Yi wrote:
>
> > Not sure exactly what changed but looked like Istvan did some work on
> > these and I'm happy to say that for the first time I have csnd.jar
> > working on my computer. =)  I tried Victor's CSDPlayer.jar and that is
> > now working well.
>
>Actually, the problem with having to run scons twice to build csnd.jar
>is still there. What may be an improvement is the addition of
>-fno-strict-aliasing to the compiler flags for the *_wrap.cc files;
>if previously you always got a segmentation fault when trying to use
>classes from csnd, that may be the case.
>Also, I added a few (rather ugly) glue functions for polling messages
>(eliminating the need for a message callback that is not possible in
>Python, Java, etc.), creating argc/argv lists, pointers to MYFLT arrays
>(for use with csoundGetChannelPtr() and other functions), and using
>opcode and channel lists. This area probably still needs to be improved.
>
>
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Victor Lazzarini
Music Technology Laboratory
Music Department
National University of Ireland, Maynooth 



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