gpr_timespec gpr_now(gpr_clock_type clock) {
gpr_timespec now;
struct timeval now_tv;
double now_dbl;
now.clock_type = clock;
switch (clock) {
case GPR_CLOCK_REALTIME:
gettimeofday(&now_tv, NULL);
now.tv_sec = now_tv.tv_sec;
now.tv_nsec = now_tv.tv_usec * 1000;
break;
case GPR_CLOCK_MONOTONIC:
now_dbl = (mach_absolute_time() - g_time_start) * g_time_scale;
now.tv_sec = (gpr_int64)(now_dbl * 1e-9);
now.tv_nsec = (gpr_int32)(now_dbl - ((double)now.tv_sec) * 1e9);
break;
case GPR_CLOCK_PRECISE:
gpr_precise_clock_now(&now);
break;
case GPR_TIMESPAN:
abort();
}
return now;
}
gpr_timespec gpr_now(gpr_clock_type clock_type) {
struct timespec now;
GPR_ASSERT(clock_type != GPR_TIMESPAN);
if (clock_type == GPR_CLOCK_PRECISE) {
gpr_timespec ret;
gpr_precise_clock_now(&ret);
return ret;
} else {
clock_gettime(clockid_for_gpr_clock[clock_type], &now);
return gpr_from_timespec(now, clock_type);
}
}
static gpr_timespec now_impl(gpr_clock_type clock_type) {
struct timespec now;
GPR_ASSERT(clock_type != GPR_TIMESPAN);
if (clock_type == GPR_CLOCK_PRECISE) {
gpr_timespec ret;
gpr_precise_clock_now(&ret);
return ret;
} else {
#if defined(GPR_BACKWARDS_COMPATIBILITY_MODE) && defined(__linux__)
/* avoid ABI problems by invoking syscalls directly */
syscall(SYS_clock_gettime, clockid_for_gpr_clock[clock_type], &now);
#else
clock_gettime(clockid_for_gpr_clock[clock_type], &now);
#endif
return gpr_from_timespec(now, clock_type);
}
}