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[Discuss-gnuradio] Possible diagnosis for issue 520, hier_block2::discon
[Discuss-gnuradio] Possible diagnosis for issue 520, hier_block2::disconnect_all() misbehavior
Sat, 17 Aug 2013 09:33:51 -0700
(I would have sent this as a comment on the issue tracker, but creating an
account didn't seem to give me permission to comment.)
I've been using GNU Radio (strictly via Python) and met what seems to be the
already-reported issue <http://gnuradio.org/redmine/issues/520>, where a
hier_block2 will misbehave after calling disconnect_all().
Specifically, according to the exceptions seen from Python, it forgets that it
has any inputs or outputs and rejects attempts to connect to them; for example,
"output port 0 out of range for throttle(2)" resulting from
I took a look at the code, and I found this suspicious bit in
I have very little C++ experience, but if I understand correctly, the last two
lines will cause the input and output port vectors to have length 0, which
would explain the observed behavior. There does not seem to be any code which
increases the size of the vectors again.
If this is so, the fix would be to reset each element to the unset value
individually rather than removing elements. (I don't know how to write that in
I hope someone who has a working GNU Radio development environment (I've tried
and failed, which is an unrelated problem) can try this fix.
Kevin Reid <http://switchb.org/kpreid/>
- [Discuss-gnuradio] Possible diagnosis for issue 520, hier_block2::disconnect_all() misbehavior,
Kevin Reid <=