Hi Piotr,
Hier message ports were actually not working at all prior to this fix -
- since the logic had been changed from the originally functioning pub/sub
based message connection data structures into the more traditional digraph
flattening structure incorrectly
please see: http://gnuradio.org/redmine/issues/862#change-2460
This change was needed to correct the hier port flattening logic
and was the originally intended API that got reversed somewhere along the
way -
GRC was updated to correspond --
Have you tested your hier message ports actually function with 3.7.8
successfully prior to this? I would be kind of surprised -
Perhaps if you are writing python code, some kind of conditional check work
around might be in order, or just dropping support for old versions as they
did not function correctly
-Tim
On Sat, Jan 2, 2016 at 4:12 AM Piotr Krysik <per...@o2.pl> wrote:
> Hi all,
>
> In GNU Radio version 3.7.8 message inputs of hierarchical blocks were
> created from python level with:
> self.message_port_register_hier_out("msg_in")
>
> Starting (most probably) from GNU Radio 3.7.9 message inputs are created
> with:
> self.message_port_register_hier_in("msg_in")
>
> This leads to incompatibility. I can't now distribute to the users
> python code of hierarchical blocks generated with GRC because for some
> of them it won't work (if they don't use the same GNU Radio version as I
> do). Compilation of GRC files to python with grcc during building is not
> an option as it doesn't work reliably yet and it will lead to higher
> level of problems.
>
> Currently I manually added this code to my hierarchical blocks in order
> to make them work on with GNU Radio earlier than 3.7.9:
>
> from distutils.version import LooseVersion as version
>
> if version(gr.version()) >= version('3.7.9'):
> self.message_port_register_hier_in("msg_in")
> else:
> self.message_port_register_hier_out("msg_in")
>
> Is it possible to fix this problem for example on the level GRC - so it
> generate code that is compatible with GNU Radio versions < 3.7.9 and
> >=3.7.9?
>
> Best Regards,
> Piotr Krysik
>
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