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From: dana@dino.bellcore.com (Dana A. Chee)
Newsgroups: comp.windows.x
Subject: Re: HELP! (sockets/X)
Message-ID: <DANA.88Aug22090308@dino.bellcore.com>
Date: 22 Aug 88 13:08:02 GMT
References: <80100001@convex>
Sender: news@bellcore.bellcore.com
Organization: Bellcore, Morristown, NJ  USA
Lines: 42
In-reply-to: cuddy@convex.UUCP's message of 27 Jul 88 09:57:00 GMT

In article <80100001@convex> cuddy@convex.UUCP writes:

   Here's a question for all you X11R2 wizards:

       I'm writing a program that does a select on a socket to wait for
       data from a daemon program.  It also needs to look for events from the 
       X server (exposes, mouse clicks, etc.).  I really don't want to do a 
       non blocking select, check if there are X events and then go back to 
       sleep.  I'm a novice 'X' programmer: is there something I'm missing?

Yes,  you can add the X file descriptor to your select call.  It is
obtained by:
	Xfd = ConnectionNumber(display);

where 'display' is the display returned from your XOpenDisplay().

	Now, when your select returns, you test to see which file
descriptor has data.

	readfiles = (1 << yourSocket) | (1 << Xfd );
	n = select(32, &readfiles, 0, 0, 0);
	
	if( readfiles & (1 << Xfd) )
	{
		XNextEvent(dpy, &event);
		.
		.
		.
	}
	else
	{
		/* whatever you wish with your socket */
	}

Hope this helps.
--
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