timer class in linux

Question

I need a timer to execute callbacks with relatively low resolution. What\'s the best way to implement such C++ timer class in Linux? Are there any libraries I could use?

Answer 1

Try the clock_gettime() function, defined in time.h:

int clock_gettime(clockid_t clk_id, struct timespec *tp);

struct timespec {
  time_t   tv_sec;        /* seconds */
  long     tv_nsec;       /* nanoseconds */
};

Typically you might call it like this:

struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);