[Swig-user] Problem with C++/Java memory deallocation

[Juanjo V. <jv...@cn...>]

Hello everybody!

I'm trying to fix a problem with swig since a lot of time ago.

I'm wrapping a C++ library to use it from java. This library is pretty
complex, so we don't want to reimplement algorithms in java. But, the
problem is that objects are destroyed while execution and I don't now
why.

I can create them from java, but if I call any of the C++ functions it
crashes because of NULL pointers. I tried to do some research and I
discovered that objects destructor is invoked somewhere ¡¡but there is
no explicit call to it!! =S. And it doesn't happen in all computers,
which is really weird.

I found some stuff on the internet:
http://stackoverflow.com/questions/2778332/hot-to-get-rid-of-memory-allocations-deallocations-in-swig-wrappers

But it shows some complex stuff that I don't understand.

I also think this problem might have something to do with what they call
"premature garbage collection":
http://www.swig.org/Doc1.3/Java.html#java_pgcpp

But, ¿how do I set "swigCMemOwn" in the swig interface, to not allow
auto garbage collection?

I would appreciate any help with that as it's driving me mad =/ and I
can't continue with my development until this is fixed =(

Sincerelly,

Juanjo Vega.

-- 
Juanjo Vega (jv...@cn...)

Unidad de Biocomputación. Laboratorio B-13.
Centro Nacional de Biotecnología. CNB-CSIC.
C\ Darwin, 3. Campus de Cantoblanco.
Universidad Autónoma de Madrid.
28049, Madrid, Spain.

+34 91 585 4510

http://www.cnb.csic.es
http://www.biocomp.cnb.csic.es

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virtudes, y aquellos que caminan despacio por el camino recto pueden
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