Hi list, I have been playing around with the new message passing interface, but was unable to detect the start of the flowgraph in my asynchronous block.
The block has a worker thread that will request frames over the network and send them out over a message port. The worker thread is started in the constructor of my block like it is done in gr_message_strobe. This will however result in a race condition since the other side of the message queue might not have been constructed yet and as a consequence the first frames (messages) might be send out but not received by any block since these other blocks have not yet been subscribed to the output port. So basically I need a different way of starting my worker thread. Unfortunately the block's start() method does not get called, since my block is not part of the (stream) flowgraph. A work-around would be to give my block a stream input and connect it to a low-rate null source in order to make it receive the start/stop calls, but that's not elegant at all. What is the official way of creating a block that will generate asynchronous messages and wants to make sure that even the first message it sends out is received by the other blocks? Any suggestion or pointer into the right direction is appreciated. Yours Martin Luelf _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
