itimerspec
int timer_gettime(timer_t timerID, struct itimerspec* value);
const struct itimerspec* value, struct itimerspec* oldValue);
itimerval_to_itimerspec(const itimerval& val, itimerspec& spec)
itimerspec_to_itimerval(const itimerspec& spec, itimerval& val)
itimerspec valueSpec;
itimerspec valueSpec;
itimerspec oldValueSpec;
timer_gettime(timer_t timer, struct itimerspec* value)
timer_settime(timer_t timer, int flags, const struct itimerspec* value,
struct itimerspec* oldValue)
info_to_itimerspec(const user_timer_info& info, itimerspec& spec)
itimerspec_to_bigtimes(const itimerspec& spec, bigtime_t& _nextTime,