Async but ordered task queue

General Usage
1

I want to queue up some async tasks: however i’d like to push them in queues such that the order within a queue is conserved.
Concretely, my problem are async plots into a Makie axis. My starting point is something like that:

function event_function(ax)
    @async begin
        # multiple commands manipulating axis object ax
    end
end

The problem arises when events are triggered in quick succession and the async tasks might overlap. What I tried next is something like this:

queue = Channel{Function} do ch
    while isopen(ch)
        task = take!(ch)
        invoke_latest(task)
    end
end

function event_function(ax)
    put!(queue, () -> begin
        # multiple commands manipulating axis object ax
    end)
end

but it feels a bit hacky with the invoke_latest and so on. Is there a “default” way of achieving this kind of behavior? Or maybe a package providing a nice abstraction for such a “task queue”?

2

I think the ordering is a separate problem from the use of parallelization. Instead of devising some synchronization mechanism, I’d just give each “job” a number and sort them once they are finished.