schedsvc: Add Task Scheduler service. Try 2.

[Dmitry Timoshkov]

Alexandre Julliard <julliard at winehq.org> wrote:

> >> >> I also don't think that this limited usefulness justifies the cost of
> >> >> running the service in every single Wine session. It should be started
> >> >> only when there are actually tasks to schedule.
> >> >
> >> > The service also has a role of global xml task definitions storage, so
> >> > that any client application could add or query task status, or check
> >> > and change the task running state, and that's impossible to do without
> >> > a service, similar to the functionality provided by services.exe.
> >> 
> >> Sharing global state doesn't imply a service, there are many other
> >> ways. That doesn't mean we can't have a service, but it doesn't justify
> >> having it run in every Wine session.
> >
> > How the tasks I described already could be performed without a service?
> 
> There are plenty of ways to share global state, I'm sure you can think
> of a few yourself. Again, I'm not saying we can't have a service at all;
> but you need to find a way to not add extra cost to every single session
> for the sake of a few rare cases.

Would starting the service from taskschd.dll when an application calls
ITaskService::Connect() be a viable compromise? Of course that would mean
that the scheduled tasks will be added to the queue only when the service
is running.

-- 
Dmitry.