/*
* mach_timebase_info_trap:
*
* User trap returns timebase constant.
*/
kern_return_t
mach_timebase_info_trap(
struct mach_timebase_info_trap_args *args)
{
mach_vm_address_t out_info_addr = args->info;
mach_timebase_info_data_t info;
clock_timebase_info(&info);
copyout((void *)&info, out_info_addr, sizeof (info));
return (KERN_SUCCESS);
}
DECLINLINE(uint64_t) rtTimeGetSystemNanoTS(void)
{
static int8_t s_fSimple = -1;
/* first call: check if life is simple or not. */
if (s_fSimple < 0)
{
struct mach_timebase_info Info;
clock_timebase_info(&Info);
ASMAtomicXchgS8((int8_t * volatile)&s_fSimple, Info.denom == 1 && Info.numer == 1);
}
/* special case: absolute time is in nanoseconds */
if (s_fSimple)
return mach_absolute_time();
/* general case: let mach do the mult/div for us. */
uint64_t u64;
absolutetime_to_nanoseconds(mach_absolute_time(), &u64);
return u64;
}
