Regarding Boost message queue

GNU Radio
1

Hi,

I am developping some source code using a boost shared pointer
gr_message_sptr
which is retrieving from a queue (gr_msg_queue_sptr),
The issue is that when calling :

gr_message_sptr mesg = queue->delete_head_nowait();

from within a while loop (BTW the queue itself is being passed from a
thread
function to a subsequent function which process it),

I got an error stated as:

… /usr/include/boost/smart_ptr/shared_ptr.hpp:424: T*
boost::shared_ptr::operator->() const [with T = gr_message]:
Assertion
`px != 0’ failed.
Aborted (core dumped),
Even after googling the issue I got no clear explanation of am I doing
wrong
or missing.

All clarifications are welcome, thank you,

Regards,

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2

On Wed, Sep 18, 2013 at 3:27 PM, NaceurElOuni [email protected]
wrote:

function to a subsequent function which process it),
All clarifications are welcome, thank you,

Regards,

This is very little information to go on. But it looks like you aren’t
initializing your messages correctly.

It’s core dumping. Do a search for how to create a core dump file and
read it with gdb; that can give you a lot more information about where
and why things are breaking.

–
Tom
GRCon13 Oct. 1 - 4
http://www.trondeau.com/grcon13