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Re: [Discuss-gnuradio] return value of gr::block::general_work

From: Dave NotTelling
Subject: Re: [Discuss-gnuradio] return value of gr::block::general_work
Date: Sun, 21 Jan 2018 13:41:01 -0500


On Sun, Jan 21, 2018 at 1:34 PM, Michael Dickens <address@hidden> wrote:
In theory, yes, you can call "produce()" for each output stream with a different number of items (or, the same), then return gr::block::WORK_CALLED_PRODUCE to tell the scheduler that produce was handled inside "general_work()". I know of no blocks that actually do this, but I don't know everything. That said, the GR runtime internals support my statement & hence this is worth trying. If you do try & succeed, please do let the list know. Cheers! - MLD

On Sun, Jan 21, 2018, at 1:19 PM, Dave NotTelling wrote:
> I found in the docs that general_work only supports outputting the same number of samples to each output port (https://github.com/gnuradio/gnuradio/blob/master/gnuradio-runtime/include/gnuradio/block.h#L47-L49) but the produce method seems to tell otherwise (https://github.com/gnuradio/gnuradio/blob/master/gnuradio-runtime/include/gnuradio/block.h#L241-L248) and even has its own return flag for general_work.  So, question is: can general_work output different numbers of samples to each output port by use of the produce() function and returning -2 in general_work?

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