Re: g_io_channel_win32_new_messages() & WaitForSingleObject()

[Thomas Stover <thomas wsinnovations com>]

Tor Lillqvist wrote:
> I have never used that service control API, no idea what it is used for even...
>   
oh, just the needlessly complex, 75 step, windows' equivalent to daemon()

> But if MSDN says that the returned SERVICE_STATUS_HANDLE actually is a
> normal HANDLE and a waitable one even, that can be passed to
> WaitForSingleObject() and friends, then it should work to use it as
> the "fd" in a GPollFD.
>   
typedef struct {

#if defined (G_OS_WIN32) && GLIB_SIZEOF_VOID_P == 8
 gint64 fd;
#else
 gint           fd;
#endif
 gushort        events;
 gushort        revents
} GPollFD;


ok so on windows fd here is a pointer to a handle, not the rutime lib's 
lookup table's integer index...
any ideas what the revents mask should be?

> Unfortunately I don't actually know or understand the glib main loop
> API very well by heart, so I can't say off-hand what you then should
> do with such a GPollFD. Pass it to g_source_add_poll(), but for what
> GSource? You might need to implement your own GSource type with
> relevant callbacks to take care of that handle "firing", and then pass
> such a GSource object to g_source_attach()? Sorry...
>
> --tml
>   
typedef struct {

 gboolean (*prepare)  (GSource    *source,
                        gint       *timeout_);
 gboolean (*check)    (GSource    *source);
 gboolean (*dispatch) (GSource    *source,
                        GSourceFunc callback,
                        gpointer    user_data);
 void     (*finalize) (GSource    *source); /* Can be NULL */

 /* For use by g_source_set_closure */
 GSourceFunc     closure_callback;	   
 GSourceDummyMarshal closure_marshal; /* Really is of type GClosureMarshal */
} GSourceFuncs;


Very interesting. So presumably on windows poll() is really something 
like WaitForMultiple*()? Which would mean what - a prepare that always 
returns FALSE w/ *timeout_ = 0, and a check that does what it what 
otherwise do if WaitForSingleObject() returned hot?

I'm going to try somethings...

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