Re: [Discuss-gnuradio] block without work function won't stop

[Marcus Müller]

Huh, I'm out of my depth here.
However, yes, every subclass of gr::block automatically has a pmt::mp("system") message port, that you can use to do such things.

Best regards,
Marcus

On 02.09.2015 14:47, Nemanja Savic wrote:

Namely,

my workless function block blocks my flowgraph when I call unlock(). I made a method where I set d_finished to True, but this doesn't help.

Nemanja

On Wed, Sep 2, 2015 at 2:16 PM, Nemanja Savic <address@hidden> wrote:

Hello again,

could you please Marcus, or somebody else, give me some hint for sending done message to a block's "system" port. Are all blocks by default subscribed to system port?

Best,

Nemanja

On Tue, May 26, 2015 at 2:37 PM, Nemanja Savic <address@hidden> wrote:

Hi,

thank you Marcus for your fast answer. Well, the problem is that nobody ecept scheduler knows when the flowgraph has finished, so I don't know who should sent that message to the block. This is however not of crucial importance for me. Namely I wanted to test some of my custom blocks, and test flowgraph necever reached completion, but as soon as message accepting dummy block was out everything was fine.

Best,

Nemanja

On Tue, May 26, 2015 at 2:29 PM, Marcus Müller <address@hidden> wrote:

Hi Nemanja,

the point is that with message passing, it's not clear that your block is ever finished.
Hence in block.cc, we have a mechanism to retrieve the "finishedness" of a pure-message-block.

  bool
  block::finished()
  {
    if((detail()->ninputs() != 0) || (detail()->noutputs() != 0))
      return false;
    else
      return d_finished;
  }


So, you'll have to set the d_finished variable of your block; sadly, that's a private one by design (I think there are thread-safety reasons this is not directly exposed, but I'm not sure -- I'd have to as T[io]m about that).
The proper way to do so is to send your block a message to its pmt::mp("system") port, containing pmt::mp("done").


Best regards,
Marcus

On 05/26/2015 02:10 PM, Nemanja Savic wrote:

Hi all,

I have a block that is used only for acepting messages and writing their content into database. The block is written in python and it has no work function, but only constructor and message handler. However when I run my flowgraph it won't finish until I terminate it. When I exclude this block it runs to completion normally.

Is there any issue with messages in this case. Should I manually delete messages from the message queue or something like that.

Best,

--

Nemanja Savić

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Nemanja Savić

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Nemanja Savić