Re: [Discuss-gnuradio] Duplicate Packet Header Generator block

[Michael Dickens]

Hi Alice - I'll try to address this 2nd issue, with the bad_weak_ptr.

When you have non-block classes that includes a base & children, you have to inform SWIG how to deal with the base and/or inheriting class (if I recall: technically for the destructor, but that's not the error & the SWIG code isn't obvious either). If you copy the 5 lines & tweak that section of code found in < https://github.com/gnuradio/gnuradio/blob/master/gr-digital/swig/packet_header.i > to read as needed for your class into your OOT's main SWIG file, it should fix the issue.

Hope this helps! - MLD

On Tue, Dec 5, 2017, at 05:09 AM, Alice Lo Valvo wrote:

I understood that my new block packet_header_gen (copy of packet_header_generator) wants gr::ofdm_allocator::packet_header_default_alix::sptr const &,std::string const &,

but header_formatter = digital.packet_header_ofdm((variable_0,), 1, length_tag_key, "frame_len", "packet_num",1,1,False) and packet_header_ofdm uses gr::digital::packet_header_default.

For this reason, I duplicate packet_header_ofdm in my project that uses gr::ofdm_allocator::packet_header_default_alix.

The error is this now:

Param - Formatter Object(header_formatter):

    Value "header_formatter.formatter()" cannot be evaluated:

    tr1::bad_weak_ptr

I searched this error on google, and I understood that it is related with shared_from_this.

Any ideas?

Thank you in advance,