X event handling and multiprocessing

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RUS (Daniela.Rainer++at++RUS.Uni-Stuttgart.DE)
Thu, 29 Oct 1998 17:11:33 +0000

Hi,

I want to do X event handling in a Performer application (I don't want to use
pfu...). I do not fork an extra process for X but I need multiprocessing.

I wrote a very simple program, it's attached to this email. It looks very
similar to hlcube.c.

Could anybody tell me why it runs fine in singleprocessing (PFMP_APPCULLDRAW)
and crashes in multiprocessing (PFMP_APP_CULLDRAW)? The solution must be very
simple but I don't see it at the moment.

Thanks for any help!

Best Regards
Daniela

-- 
-------------------------------------------------------------------------
Daniela Rainer                       | email: rainer++at++hlrs.de
Rechenzentrum Uni Stuttgart (RUS)    | http://www.hlrs.de/people/rainer/
Allmandring 30a, 70550 Stuttgart     | Tel:   +49 (0) 711 685 5837
GERMANY                              | Fax:   +49 (0) 711 682 357




/************************************************************************/
/*									*/
/*	Simple program showing my problems with X event handling        */
/*      in multiprocess mode				         	*/
/*									*/
/*	cc -o simple simple.c -lpf_ogl 		        	        */
/*	-lmpc -limage -lfm -lGLU -lGL    		                */
/*	-lm -lXm -lXt -lfpe -lXmu -lX11         			*/	
/*									*/
/************************************************************************/


#include	<stdlib.h>
#include	<stdio.h>
#include        <math.h>


#include	<X11/Xlib.h>
#include   	<X11/Xutil.h>
#include  	<X11/keysym.h>


#define 	PF_CPLUSPLUS_API    0
#include 	<Performer/pf.h>
#include 	<Performer/pr.h>


int 
main(int argc, char *argv[])
{
    pfScene	    *scene;
    pfPipe	    *pipe;
    pfPipeWindow    *pwin;
    pfChannel       *chan;
    pfWSWindow	    xwin;
    Display         *xdisplay;
    XEvent 	    event;


    pfInit();


    /* the program runs fine with 
       PFMP_APPCULLDRAW but crashes with PFMP_APP_CULLDRAW */
    pfMultiprocess(PFMP_APPCULLDRAW);
    pfConfig();


    scene = pfNewScene();


    pipe = pfGetPipe(0);    
    pwin = pfNewPWin(pipe); 
    pfPWinOriginSize(pwin,  100,  100,  400,  400);   
    pfPWinType(pwin, PFPWIN_TYPE_X);
    pfConfigPWin(pwin);
    pfFrame();


    chan = pfNewChan(pfGetPipe(0));
    pfMakeSimpleChan(chan,45.0f);
    pfChanScene(chan, scene);


    xwin = pfGetPWinWSWindow(pwin);
    xdisplay = pfGetCurWSConnection();
    XSelectInput(xdisplay, xwin, KeyPressMask);
    XMapWindow(xdisplay, xwin);




  
    while (1)
    {
	
	
	pfSync();        


	pfFrame();
	while (XPending(xdisplay))
        {
            XNextEvent(xdisplay, &event);
            switch (event.type)
            {
                case KeyPress:
                   fprintf(stderr,"Key Press Event !\n");
            }
        }
	
    
    }
}

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