#include <time.h>
#include <sys/time.h>

#ifdef __MACH__
#include <mach/clock.h>
#include <mach/mach.h>
#endif



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;

#else
clock_gettime(CLOCK_REALTIME, &ts);
#endif