Re: [Basic Glib Questions/Help] Unable to create GSource

[Owen Taylor <otaylor redhat com>]

On Mon, 2003-12-22 at 14:04, Ryan McDougall wrote:
> On Sun, 2003-12-21 at 21:06, Owen Taylor wrote:
> > On Sun, 2003-12-21 at 17:27, Ryan McDougall wrote:
> > > Hello,
> > >   I am developing a simple console based project using Glib (partly so I
> > > can learn Glib) but I have lots of questions due to the less than
> > > documented nature of Glib. Basically at this point all I want to do is
> > > tie console input to the event loop -- but I have little idea how to go
> > > about it.
> >
> > Without looking at your code, I strongly suspect you want
> > g_io_channel_add_watch(), not a custom GSource.
> >
> > Regards,
> >                                     Owen
>
> Thank you for your time Owen,
>
>       I have already discovered g_io_channel_watch through my meandering
> about, but I was wanting to ask you some stuff.
>
> Creating a custom GSource is the most explicit (and overkill for what I
> want now) way of listening for input events, but I think I want to learn
> how to do this for the sake of knowing how -- is there example code some
> where? 

GLib contains various sources that you can look at the source of ...
timeouts, idles, IO watches.

> Is there a reason why I should derive my source from GSource?

The GSource structure contains various fields that are needed in all
sources. If you need more fields, you add them by creating a larger
structure with the GSource structure as its first element.

> Also, currently I use g_io_create_watch and manually attach the GSource
> to the GMainContext, which makes sense to me, but how does
> g_io_add_watch work if it doesnt take a reference to the GMainContext I
> created? Id really like to know more about how this stuff works. :)

g_io_add_watch() creates the source and adds it to the default main
context. Which is all virtually all programs ever need.

Regards,
                                                Owen