Re: [Vala] async method and delegate

[Jim Nelson <jim yorba org>]

On Mon, Jun 20, 2011 at 6:27 PM, Nor Jaidi Tuah <norjaidi tuah ubd edu bn>wrote:

> On Mon, 2011-06-20 at 17:37 -0700, Jim Nelson wrote:
> > With async, the delegate *is* copied, you just don't see it in the
> > Vala code.  With an async method, when the thread of execution yields,
> > the state of the function at that point is stored (copied or ref'd) in
> > a context structure.  When the thread of execution resumes later, the
> > state is pulled back out and the function resumes.
>
> Has that any bearing on the bug I mentioned in
> my earlier email?
If you mean the warning about copying delegates being discouraged, then yes
it has bearing -- the delegate is being copied inside the async function.
That's my point, the warning is accurate, it's because async methods have
certain side-effects that are not apparent in the code on the screen.  For
another example of this, see
https://bugzilla.gnome.org/show_bug.cgi?id=639054

The problem regarding the closure I haven't looked into.

-- Jim