Marcus,

Thanks for your reply. What will the shared pointer be called. I see stuff
like this in the code:

GR_SWIG_BLOCK_MAGIC2(uhd, usrp_source)
GR_SWIG_BLOCK_MAGIC2(uhd, usrp_sink)
GR_SWIG_BLOCK_MAGIC2(uhd, amsg_source)


Presumably, that generates a structure that is registered as a global
pointer. So in my mac, I want something like

extern ....

At the risk of asking for too much help, can you give me some guidance or
point me to a fragment of code somewhere that does this sort of thing.

Thanks,

Ranga



On Thu, Nov 14, 2013 at 4:06 AM, Marcus Müller <mar...@hostalia.de> wrote:

>  Hi Ranga,
>
> that's what pointers are for, after all. Just do it! Thanks to the
> make()-magic you basically always have a smart shared pointer instead of an
> block object (unless you really try to break the system ;) ).
>
> Just a quick note though: MAC is usually timing-relevant. Timed commands
> might not work as you expect, so please be aware that calling
> set_command_time on your source might break functionality since there is no
> out-of-order execution.
>
> Greetings,
> Marcus
>
>
> On 14.11.2013 01:26, M. Ranganathan wrote:
>
>  Hello all!
>
>  I want to write a block that can directly access the uhd_usrp_source.
> This block is a mac block hence it is up on the food chain and far away
> from uhd_usrp_source in terms of its processing function. What is a good
> way of passing it a handle to the usrp_source ?
>
>  I can think of some hacks (such as a static global pointer where the
> uhd_usrp_source C++ object registers itself) but it seems ugly to me to
> take that route. Is there a better way to access global objects from within
> a block implementation.
>
>  Thanks in advance for any help.
>
>  Regards,
>
> Ranga
>
> --
> M. Ranganathan
>
>
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-- 
M. Ranganathan
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