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Re: [Discuss-gnuradio] Locking TopBlock stops WavFile-Sink

From: Luke Berndt
Subject: Re: [Discuss-gnuradio] Locking TopBlock stops WavFile-Sink
Date: Mon, 5 Jan 2015 09:45:50 -0500

Awesome! That is totally it.

I went back and checked and the 3.6 version of wavfile_sink_impl does not have a stop function. It only closes the file when close() is called or the destructor.

This is a pretty big change from 3.6 to 3.7 and I didn't see it documented anywhere. Is this something I can add to the 3.6 -> 3.7 guide in the wiki? Is there a better place to capture some of the lower level changes?

Are there any good guides that walk through the flows for high level functions? Like what calling lock() triggers in the blocks and the scheduler? It would make it a lot easier to walk through the code.

In order to solve my problem, it looks like I should create a custom version of wavfile_sink that doesn't have stop().

Thanks again!

 - Luke

On Mon, Jan 5, 2015 at 7:34 AM, Sylvain Munaut <address@hidden> wrote:

When there is a lock()/unlock() cycle, the ->stop() will end up being
called on all the flowgraph() blocks.

The wavsink block does implement stop() and that's where it closes the
file and updates the wavheader.

But there is no implementation for start(), it actually opens the file
in the constructor, so it can't resume.



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