Attachment 3362 Details for Bug 4550 – demonstration of the failure for big request

demonstration of the failure for big request

bigreq.c (text/plain), 2.99 KB, created by Rui Feng on 2005-09-22 04:08:55 UTC

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Filename:

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Creator: Rui Feng

Created: 2005-09-22 04:08:55 UTC

Size: 2.99 KB

patch

obsolete

>
>#include <X11/Xlib.h>
>
>#include <stdio.h>
>#include <stdlib.h>		
>#include <unistd.h>		
>
>#define GOOD	1
>#define BIG_REQ	2
>#define TOO_LONG	3
>
>static Display	*display;
>static Drawable	d;
>static GC		gc;
>static Window	win;
>static int screen_num;
>static XPoint	*points;
>static int		npoints;
>static int		mode;
>
>unsigned int display_width, display_height;	
>unsigned int win_width, win_height;	
>
>void prepare_points(int npoints)
>{
>	int i, x, y;
>
>	x = y = 10; 
>
>	points = (XPoint *)malloc(sizeof(XPoint)*npoints);
>	if (points == NULL)
>	{
>		fprintf(stderr, "cannot allocate memory of %d XPoint\n", npoints);
>		exit (1);
>	}
>
>	for (i = 0; i < npoints; i++)
>	{
>		(points+i)->x = x;
>		(points+i)->y = y;
>
>		x += 10;
>		y += 10;
>
>		if (x >= win_width)
>		{
>			x = 10;
>		}
>
>		if (y >= win_height)
>		{
>			y = 10;
>		}
>	}
>}
>
>void drawlines(Display* display, Window win, GC gc, int mode)
>{
>  switch (mode) {
>    case GOOD:
>		npoints = (XMaxRequestSize(display) - 3)/2;
>
>		prepare_points(npoints);
>
>		break;
>	case BIG_REQ:
>		npoints = XExtendedMaxRequestSize(display);
>
>	    if (npoints)
>	    {
>	      npoints = ((npoints - 3) >> 2 ) << 2;
>		  prepare_points(npoints);
>	    }
>		else
>	    {
>			fprintf(stderr, "the server cannot support bigrequest extension\n");
>			return; 
>		}
>		break;
>	case TOO_LONG:
>		npoints = XExtendedMaxRequestSize(display);
>
>	    if (npoints)
>	    {
>	      npoints = ((npoints + 3) >> 2 ) << 2;
>		  prepare_points(npoints);
>	    }
>		else
>	    {
>			fprintf(stderr, "the server cannot support bigrequest extension\n");
>			return; 
>		}
>	    break;  
>	}
>
>  XDrawLines(display, win, gc, points, npoints, CoordModeOrigin);
>
>  free(points);
>}
>
>void
>main(int argc, char* argv[])
>{
>  unsigned long valuemask = 0; 
>  XGCValues values;	
>  int win_border_width = 2;
>  int mode = 0;
>  char *display_name = getenv("DISPLAY");  
>
>  display = XOpenDisplay(display_name);
>  if (display == NULL) {
>    fprintf(stderr, "%s: cannot connect to X server '%s'\n",
>            argv[0], display_name);
>    exit(1);
>  }
>
>  screen_num = DefaultScreen(display);
>  display_width = DisplayWidth(display, screen_num);
>  display_height = DisplayHeight(display, screen_num);
>
>  win_width = (display_width / 2);
>  win_height = (display_height / 2);
>
>  printf("window width - '%d'; height - '%d'\n", win_width, win_height);
>
>  win = XCreateSimpleWindow(display, RootWindow(display, screen_num),
>                            0, 0, win_width, win_height, win_border_width,
>                            BlackPixel(display, screen_num),
>                            WhitePixel(display, screen_num));
>  XMapWindow(display, win);
>
>  XFlush(display);
>
>  gc = XCreateGC(display, win, valuemask, &values);
>  if (gc < 0) {
>	fprintf(stderr, "XCreateGC: \n");
>  }
>
>  XSetForeground(display, gc, BlackPixel(display, screen_num));
>  XSetBackground(display, gc, WhitePixel(display, screen_num));
>
>  XSync(display, False);
>
>
>  for (mode = GOOD; mode <= TOO_LONG; mode++)
>  {
>	drawlines(display, win, gc, mode);
>  
>    XFlush(display);
>
>    sleep(5);
>
>	XClearWindow(display, win);
>  }
>
>  XCloseDisplay(display);
>}
>

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Attachments on bug 4550: 3362

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