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From: vrm@cathedral.cerc.wvu.wvnet.edu (Vasile R. Montan)
Newsgroups: comp.windows.x
Subject: Need Help with mixing RPC and X
Keywords: RPC,Events
Message-ID: <547@cerc.wvu.wvnet.edu.edu>
Date: 30 May 90 21:13:36 GMT
Sender: news@cerc.wvu.wvnet.edu
Lines: 47


  I have only been working with X for a short time so this may be a
basic question or even a stupid one, but I would appreciate any help
that I can get.

  I am trying to convert an RPC server and client from handling
standard input to using X.  The problem is that both RPC and X require
a callback-handling loop.  I can see how to do this if I want to poll
both the RPC port and the X event queue, but I do not have anything
else to do in the program and do not want to waste CPU for an idle
loop.  What I need is either:

1. The ability to tell XtMainLoop to look for an RPC request while
   looking for X events, and have it call an appropriate callback.

or

2. The capability to wait for either an RPC request or an X event and
   calling the appropriate procedure to handle the RPC request or the
   X event depending on what was pending.  This is similar to what I
   do no for stdin, but I have a feeling that this is not PC in X.

   For example:   main()                                                   
		  {                                                        
		    int imask;                                            
		    svc_register (...);                                   
		    for (;;) {                                            
		      imask = (svc_fds | x_file_descriptor_set_address); 
		      if (select (32, &imask, NULL, NULL, NULL) == -1);  
		        continue;                                       
		      if (imask & x_file_descriptor_set_address)         
 		        handle_x_event();                               
        	      if (imask & svc_fds)                               
		        svc_getreq (imask);                             
		    }                                                     
		  }                                                        
	
or

3. Maybe you have a better idea.

   If anyone has any ideas or knows of somewhere to look for more
information, please let me know.

   Thanks,

-- Vasile