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work around lack of clock_gettime in os x
author: jbenet
os x, compile with: gcc -o testo test.c
linux, compile with: gcc -o testo test.c -lrt
#include <time.h>
#include <sys/time.h>
#include <stdio.h>
#ifdef __MACH__
#include <mach/clock.h>
#include <mach/mach.h>
void current_utc_time(struct timespec *ts) {
#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
ts->tv_sec = mts.tv_sec;
ts->tv_nsec = mts.tv_nsec;
clock_gettime(CLOCK_REALTIME, ts);
int main(int argc, char **argv) {
struct timespec ts;
printf("s: %lu\n", ts.tv_sec);
printf("ns: %lu\n", ts.tv_nsec);
return 0;

thx, it works! ;-)




I really appreciate it.




thanks your code, thanks


Awesome! Thanks


Many thanks. My senior project is that much closer to completion!


thanks for sharing,appreciate it.


I need the return value in clock_get_time(..), how can it be done os OS X?
For details please see

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