Files
ostep-code/intro/mem.c
2018-08-15 11:52:29 -05:00

24 lines
500 B
C

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include "common.h"
int main(int argc, char *argv[]) {
if (argc != 2) {
fprintf(stderr, "usage: mem <value>\n");
exit(1);
}
int *p;
p = malloc(sizeof(int));
assert(p != NULL);
printf("(%d) addr pointed to by p: %p\n", (int) getpid(), p);
*p = atoi(argv[1]); // assign value to addr stored in p
while (1) {
Spin(1);
*p = *p + 1;
printf("(%d) value of p: %d\n", getpid(), *p);
}
return 0;
}