[Rust] To Signal or not to Signal

Plugin and library development
1

I am currently working through writing my first Plugin. Using tutorial 1 as a basis I am in the process of porting RidgeRun’s GstPerf plugin to dive a little deeper as well as learn a bit about FFI and the like. I remember a talk from Jan Schmidt @ LinuxConfAU 2018. He had mentioned something like “We are moving away from signals”. I have noticed in the core docs Signals are not shown (anymore) in the system graph, and only mentioned in the dev docs.

GstPerf uses signals. I am going to implement the signal just to know how that works, but I am really interested in how this ‘should’ be done. Should I use the message bus? Any guidance and/or pointers to docs is very much appreciated.

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It depends on what the signal in question does. For many cases, signals are the only usable solution. In other cases, something else (e.g. messages) might be a better choice.

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