#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <assert.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>

//
// gcc -g -Wall -o multithread_quick_window multithread_quick_window.c -lX11
//
// test case for a window which only exists briefly causing a X server segfault
//

static void *
worker(void *ignored)
{
  // Open the display
  Display *dpy = XOpenDisplay(NULL);
  assert(dpy);

  // Get some colors
  int blackColor = BlackPixel(dpy, DefaultScreen(dpy));

  while (1)
   {
     XSizeHints sh;
     int t;

     // Create the window
     Window w = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 200, 100, 0, blackColor, blackColor);

     sh.width = 200;
     sh.height = 100;
     sh.x = 0;
     sh.y = 0;
//     sh.flags = (rand() % 2 == 1) ? (PPosition | USPosition) : 0;
     sh.flags = (PPosition | USPosition);
     XSetWMNormalHints(dpy, w, &sh);

     // Map the window
     XMapWindow(dpy, w);
     XFlush(dpy);

     t = rand() % 500000;
     usleep(t);

     XDestroyWindow(dpy, w);
     XFlush(dpy);

     t = rand() % 500000;
     usleep(t);
   }

  return 0;
}

int main()
{
  int i;

  for (i = 0; i < 8; i++)
    {
      pthread_t thread;
      pthread_create(&thread, NULL, worker, NULL);
    }

  worker(NULL);

  return 0;
}