Re: [Discuss-gnuradio] About closing flowgraph automatically

Hi,

'doh.

Which leaves one to wonder why the finished state never gets checked.
I'll be back after a bit of tracing.

Cheers,

Marcus


On 24.07.2016 08:04, Sylvain Munaut wrote:
> Hi,
>
>> 52 int pdu_to_tagged_stream_impl::calculate_output_stream_length(const gr_vector_int &)
>> 53 {
>> 54 if (d_curr_len == 0) {
>> 55 /* FIXME: This blocking call is far from ideal but is the best we
>> 56 * can do at the moment
>> 57 */
>> 58 pmt::pmt_t msg(delete_head_blocking(PDU_PORT_ID, 100));
>> 59 if (msg.get() == NULL) {
>> 60 return 0;
>> 61 }
> [snip]
>
>> Problem is that if we use the non-blocking call here, the scheduler would have a chance to process the shutdown signal, but it would be constantly asking (spinning) for the output stream length.
>>
>> You could try out what would happen if we'd added a timeout to the blocking cal; that way, you could reduce the spinning, and hopefully get the scheduler to check for "done" messages.
> There _is_ a timeout ... that "100" in there is the # of millisec to
> wait at most.
>
>
> Cheers,
>
> Sylvain


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