1#include <mach/mach.h> 2#include <stdio.h> 3 4int main(void) 5{ 6 long long good = 5 * 1000000000LL; 7 long long bad = 5 * NSEC_PER_SEC; 8 9 printf("%lld\n%lld\n", good, bad); 10 if (good == bad ){ 11 printf("[PASS] successfully verified that (5 * 1000000000LL) == (5 * NSEC_PER_SEC). \n"); 12 return 0; 13 }else { 14 printf("[FAIL] NSEC_PER_SEC is not long long.\n"); 15 return -1; 16 } 17 /* by default return as error */ 18 19 return 1; 20} 21