#include <X11/X.h>
#include <X11/Xlib.h>
#include <assert.h>

//
// gcc -g -Wall -o testcase testcase.c -lX11
//

static int WindowExistsFlag;

static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr )
{
   (void) dpy;
   if (xerr->error_code == BadWindow)
     {
       WindowExistsFlag = 0;
     }
   return 0;
}

static int window_exists( Display *dpy, Window win )
{
   XWindowAttributes wa;
   int (*old_handler)(Display*, XErrorEvent*);

   WindowExistsFlag = 1;
   old_handler = XSetErrorHandler(window_exists_err_handler);
   XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
   XSetErrorHandler(old_handler);

   return WindowExistsFlag;
}

int main()
{
  int i;
  Display *dpy = XOpenDisplay(NULL);
  assert(dpy);

  int blackColor = BlackPixel(dpy, DefaultScreen(dpy));

  for (i = 0; i < 2; i++)
    {
      Window w = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 200, 100, 0, blackColor, blackColor);
      XMapWindow(dpy, w);
      XDestroyWindow(dpy, w);
      XSync(dpy, 0);
      window_exists(dpy, w);
      XSync(dpy, 0);
    }

  return 0;
}