/* Copyright (C) 2005 David Decotigny
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.
    
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    USA. 
 */
 
 #include <libc.h>
 #include <stdarg.h>
 #include <debug.h>
 
 
 /**
  * @file myprog8.c
  * Make sure that shared mappings (here: anonymous shared mapping) are
  * really shared between father and child
  */
 
 int main()
 {
   int i;
   char *zoup;
   int fd;
 
   fd = open("/dev/zero", O_RDWR);
   zoup = mmap((void*)4096, 8*1024*1024,
               PROT_READ | PROT_WRITE,
               MAP_SHARED,
               fd, 0x123456789012345ULL);
   close(fd);
 
   bochs_printf("mapped @%x\n", (unsigned)zoup);
 
   switch (fork())
     {
     case 0:
       bochs_printf("CHILD 1: %d %d\n", zoup[42], zoup[43]);
       for (i = 0 ; i < 1000000 ; i++)
         zoup[43] = i / 19;
       bochs_printf("CHILD 2: %d %d\n", zoup[42], zoup[43]);
       for (i = 0 ; i < 1000000 ; i++)
         zoup[43] = i / 19;
       bochs_printf("CHILD 3: %d %d\n", zoup[42], zoup[43]);
       break;
 
     default:
       bochs_printf("FATHER 1: %d %d\n", zoup[42], zoup[43]);
       for (i = 0 ; i < 1000000 ; i++)
         zoup[42] = i / 17;
       bochs_printf("FATHER 2: %d %d\n", zoup[42], zoup[43]);
       break;
     }
 
   return 0;
 }