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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
}
pub struct C.timeval {
tv_sec u64
tv_usec u64
}
fn init_time_base() C.mach_timebase_info_data_t {
tb := C.mach_timebase_info_data_t{}
C.mach_timebase_info(&tb)
return C.mach_timebase_info_data_t{
numer: tb.numer
denom: tb.denom
}
}
fn sys_mono_now_darwin() u64 {
tm := C.mach_absolute_time()
if time.time_base.denom == 0 {
C.mach_timebase_info(&time.time_base)
}
return (tm - time.start_time) * time.time_base.numer / time.time_base.denom
}
// NB: vpc_now_darwin is used by `v -profile` .
// It should NOT call *any other v function*, just C functions and casts.
[inline]
fn vpc_now_darwin() u64 {
tm := C.mach_absolute_time()
if time.time_base.denom == 0 {
C.mach_timebase_info(&time.time_base)
}
return (tm - time.start_time) * time.time_base.numer / time.time_base.denom
}
// darwin_now returns a better precision current time for Darwin based operating system
// this should be implemented with native system calls eventually
// but for now a bit tweaky. It uses the deprecated gettimeofday clock to get
// the microseconds seconds part and converts to local time
fn darwin_now() Time {
// get the high precision time as UTC clock
tv := C.timeval{}
C.gettimeofday(&tv, 0)
loc_tm := C.tm{}
asec := voidptr(&tv.tv_sec)
C.localtime_r(asec, &loc_tm)
return convert_ctime(loc_tm, int(tv.tv_usec))
}
// darwin_utc returns a better precision current time for Darwin based operating system
// this should be implemented with native system calls eventually
// but for now a bit tweaky. It uses the deprecated gettimeofday clock to get
// the microseconds seconds part and normal local time to get correct local time
fn darwin_utc() Time {
// get the high precision time as UTC clock
tv := C.timeval{}
C.gettimeofday(&tv, 0)
return unix2(i64(tv.tv_sec), int(tv.tv_usec))
}
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