Hi Kevin, Thanks for the answer, unfortunately in my case I want to keep the flowgraph running and I'd need a way to check the state of the block buffers. Maybe I can do that with a custom block before the source or maybe I should rethink my approach.
Adrian On September 16, 2019 2:42:06 PM UTC, Kevin Reid <kpr...@switchb.org> wrote: >On Mon, Sep 16, 2019 at 4:22 AM Adrian Musceac <kanto...@gmail.com> >wrote: > >> So far I haven't found a way (callback?) to tell when the last sample >is >> out of the flowgraph. I am using the C++ API of GNU radio. >> > >The wait() method of a top_block will block the calling thread until >all >items have passed through. > >Note that this will only succeed if your *source* blocks indicate there >are >no more items, by returning -1 (gr::block::WORK_DONE). Vector and file >sources and other such standard fixed-length sources do, but if your >source >is merely emitting no items at this time (e.g. a network source that's >not >currently receiving packets) the flow graph will still be running >waiting >for more. I do not know of a way to ask for "when all buffers are >currently >empty", if that's what you need.
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