Native GUI suggestion for Linux

[tobias.knopp]

@Tamas_Papp

1. I want to do a blocking read from an audio source and do the processing; this is the bulk of the CPU usage and should probably live in its own thread (doing this fast is the main motivation for using Julia),
2. the above should deposit results in a shared container between threads,
3. another thread should do the display and control.

This is doable with Julia 1.3 which I outlined here: Threading 1.3: Success Story
One issue at that time was that the @spawn macro may run on thread 1 but there has been some recent work ([ANN] ThreadPools.jl - Improved thread management for background and nonuniform tasks) that should make this feasible.

Regarding the concrete implementation: I think it is sufficient that you use one BG thread that does the processing. This BG thread can update the UI using g_idle_add. No need for an additional thread.