#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/mman.h>

extern const char *__progname;

#include "vars.h"

#include "shm.h"

void setup_shm(void)
{
 shm_size = 1U << 30;
 shm_mem = mmap(0,shm_size,PROT_READ|PROT_WRITE,MAP_ANON|MAP_SHARED,-1,0);
 if (shm_mem == MAP_FAILED)
  { fprintf(stderr,"%s: can't mmap anonymous space: %s\n",__progname,strerror(errno));
    exit(1);
  }
}