Re: [Vala] Combining async methods with external processes

[James Moschou <james moschou gmail com>]

I just thought the async/yield methodology was an elegant way of
chaining together multiple background tasks, but are you saying that
it's not suited to what I want and I should do it all with threads and
hand-written callbacks?

On 19 November 2010 22:55, pancake <pancake youterm com> wrote:
> you are using coroutines which are not designed to "run stuff in
> background".
>
> coroutines are designed to run collaborative code which hangs if one of the
> parts doesn't pass the token when necessary.
>
> You have to use threads, or an idle task if you have a mainloop.
>
> On 11/19/10 08:34, James Moschou wrote:
> > Hello,
> >
> > I want to perform a series of tasks one after the other, but in the
> > background. So I have:
> >
> > async bool perform_tasks () {
> >     bool result = yield task1 ();
> >     if (result)
> >         result = yield task2 ();
> >     if (result)
> >         result = yield task3 ();
> >
> >     Idle.add (perform_tasks.callback)
> >     yield;
> >     return result;
> > }
> >
> > more or less.
> >
> > One of the tasks however spawns a new process, and I'm not sure how
> > the callback from this process is supposed to fit into Vala's way of
> > doing async programming, i.e. Process.spawn_async_with_pipes () isn't
> > actually an "async" method.
> >
> > How would I do this, am I making things too complicated?
> >
> > Cheers,
> > James
> > _______________________________________________
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>
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