Error when calling method of base class block

GNU Radio
1

Hi all guys,

I am making a file sink block with limited number of elements allowed to
be
written in a file. I coded my block in the same way as it was done in
file_sink block found in blocks module. Namely, I derived my block from
file_sink_base and gr_sync_block, and so on, the rest is copied from the
existing block and finally the work function is slightly changed.
Unfortunately I am not able to call methods inherited from
file_sink_base
class. I believe it is swig issue but don’t know how to make it. The
error
that I get when calling close() method inside my test:

1: Test timeout computed to be: 9.99988e+06
1: thread[thread-per-block[1]: <gr_block file_sink_lim_b (2)>]:
gr_block_detail::n_output_items
1: thread[thread-per-block[1]: <gr_block file_sink_lim_b (5)>]:
gr_block_detail::n_output_items
1: E
1:

1: ERROR: test_001_t (main.qa_file_sink_lim_b)
1:

1: Traceback (most recent call last):
1: File
“/home/savi_ne/work/gnuradio/gr-TPMS/python/qa_file_sink_lim_b.py”, line
44, in test_001_t
1: self.dst.close()
1: AttributeError: ‘file_sink_lim_b_sptr’ object has no attribute
‘close’
1:

I use gnuradio 3.6.5.1 version.

2

What do your swig file changes look like?

M

3

Hello,

well after a lot of digging in the mailing list I added this into my
swig.i
file:

%include “gnuradio/blocks/file_sink_base.h”

and I also added this into my CMakeLists.txt:

set(GR_REQUIRED_COMPONENTS BLOCKS)

It turned out that only first change is required.

Best and hope that this will help somebody in the future.

Nemanja