Re: [Vala] [Async] why use .begin ?

[Jürg Billeter <j bitron ch>]

On Sat, 2009-09-19 at 01:41 +0200, Michael 'Mickey' Lauer wrote:
> > No, the call without .begin() is being deprecated.
> >
> > > From yestarday's discussion on IRC I understood it's not generally possible
> > to collapse to synchronous call automagically. Doing it involves running
> > a (recursive) main loop until the callback is called, but this brings a lot
> > of problems like something quitting the outer loop, the nested loops being
> > quit out of order and such. Therefore it should not be done without user's
> > explicit request.
>
> I see, am I correct then in assuming that at the end of the day this means, 
> calling an asynchronous function with out/return arguments is forbidden/will 
> not work from synchronous code?

You can certainly call an asynchronous method with out/return values,
however, you obviously have to wait for the method to return until you
can use them. You could, for example, handle them in a closure used as
callback to .begin.

Jürg