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v/vlib/time/time_darwin.c.v
2020-04-26 22:14:54 +03:00

39 lines
803 B
V

module time
#include <mach/mach_time.h>
const (
// start_time is needed on Darwin and Windows because of potential overflows
start_time = C.mach_absolute_time()
time_base = init_time_base()
)
[typedef]
struct C.mach_timebase_info_data_t {
numer u32
denom u32
}
fn C.mach_absolute_time() u64
fn C.mach_timebase_info(&C.mach_timebase_info_data_t)
fn C.clock_gettime_nsec_np(int) u64
struct InternalTimeBase {
numer u32 = 1
denom u32 = 1
}
fn init_time_base() InternalTimeBase {
tb := C.mach_timebase_info_data_t{}
C.mach_timebase_info(&tb)
return InternalTimeBase{numer:tb.numer, denom:tb.denom}
}
fn sys_mono_now_darwin() u64 {
tm := C.mach_absolute_time()
if time_base.denom == 0 {
C.mach_timebase_info(&time_base)
}
return (tm - start_time) * time_base.numer / time_base.denom
}