Re: NSRunLoop and Events

[Richard Frith-Macdonald]

On 15 Apr 2004, at 22:15, Stefan Kleine Stegemann wrote:

> Hi,
>
> GNUstep provides the possibility to register for events with a runloop
> (addEvent:type:watcher:forMode:). As far as i understand, I have
> to specify an fd that then is monitored by the runloop. When an
> event on the fd occurs, receivedEvent gets called on the watcher.

Yes.

> Assuming that the above is right, is it possible to specify an fdset
> instead of a single fd (the API just says (void*) for the event 
> parameter
> of addEvent)?

No ... the use of void* is just future-proofing for possible future 
systems
like a possibility of using native file handles on ms-windows rather 
than
file descriptors.  It only supports file descriptors now, and the api 
is only
intended to monitor for events on single sources.

> I have a couple of fd's and want to get notfied whenever
> an event occurs on one of this fd's. I don't have the possibility to
> register an event for each fd because the library i'm using gives me
> only an fdset.

I don't see why that should be a problem ... keep a copy of the last
fdset used, and whenever you get a new fdset, you can compare
it with the previous version to see which fds have been added/removed
and call the methods to add/remove those fds to the runloop.