/* Mmapping.*/

#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <time.h>
#include <string.h>

#include <sys/types.h>
#include <sys/mman.h>

#include "common.h"

#define PATH "/home/s191944/lab5/mmap_file"

int main( int argc, char* argv[] ) {
   
   struct inf_t *data;
   time_t start;
   int fd;

   start = time(NULL);
   
   massert((fd = open( PATH, O_RDWR| O_CREAT, 0 )) < 0, "open");
   massert( ftruncate( fd, sizeof(struct inf_t)) < 0, "ftruncate");
   
   data=(struct inf_t*)mmap(0,sizeof(struct inf_t),PROT_WRITE,MAP_SHARED,fd,0);
   if( data == MAP_FAILED ) {
      perror("mmap");
      _exit(-1);
   }

   memset(data, 0, sizeof(struct inf_t));
   set_id( data );
   while( 1 ) {
      update_inf( data, start );
      sleep(1);
   }
   return 0;
}