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

void stores(void *addr, unsigned long size, unsigned long stride);

int main(int argc, char *argv[])
{
  unsigned long size, stride, offset,i;
  void *a;
  if (argc!=4) {
    fprintf(stderr,"Usage: %s <size> <stride> <offset>\n", argv[0]);
    exit(1);
  }
  size = strtoul(argv[1],NULL,10);
  stride = strtoul(argv[2],NULL,10);
  offset = strtoul(argv[3],NULL,10);
  a = mmap(NULL,size,PROT_READ|PROT_WRITE,
           MAP_PRIVATE|MAP_ANONYMOUS,-1,0);
  if (a==MAP_FAILED) {
    perror("mmap failed");
    exit(1);
  }
  stores(a+offset, size-offset, stride);
  return 0;
}