87 lines
2.0 KiB
V
87 lines
2.0 KiB
V
module time
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#include <mach/mach_time.h>
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// start_time is needed on Darwin and Windows because of potential overflows
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const start_time = C.mach_absolute_time()
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const time_base = init_time_base()
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@[typedef]
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pub struct C.mach_timebase_info_data_t {
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numer u32
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denom u32
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}
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fn C.mach_absolute_time() u64
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fn C.mach_timebase_info(&C.mach_timebase_info_data_t)
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fn C.clock_gettime_nsec_np(i32) u64
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struct InternalTimeBase {
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numer u32 = 1
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denom u32 = 1
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}
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fn init_time_base() C.mach_timebase_info_data_t {
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tb := C.mach_timebase_info_data_t{}
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C.mach_timebase_info(&tb)
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return C.mach_timebase_info_data_t{
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numer: tb.numer
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denom: tb.denom
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}
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}
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fn sys_mono_now_darwin() u64 {
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tm := C.mach_absolute_time()
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if time_base.denom == 0 {
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unsafe {
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C.mach_timebase_info(&time_base)
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}
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}
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return (tm - start_time) * time_base.numer / time_base.denom
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}
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// Note: vpc_now_darwin is used by `v -profile` .
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// It should NOT call *any other v function*, just C functions and casts.
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@[inline]
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fn vpc_now_darwin() u64 {
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tm := C.mach_absolute_time()
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if time_base.denom == 0 {
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unsafe {
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C.mach_timebase_info(&time_base)
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}
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}
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return (tm - start_time) * time_base.numer / time_base.denom
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}
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// darwin_now returns a better precision current time for macos
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fn darwin_now() Time {
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// Use clock_gettime_nsec_np to avoid field-address lowering on C.timespec.
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epoch_ns := i64(C.clock_gettime_nsec_np(C.CLOCK_REALTIME))
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sec := epoch_ns / i64(second)
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nsec := int(epoch_ns % i64(second))
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loc_tm := C.tm{}
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C.localtime_r(voidptr(&sec), &loc_tm)
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return convert_ctime_with_unix(loc_tm, nsec, sec + i64(loc_tm.tm_gmtoff))
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}
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// darwin_utc returns a better precision current time for macos
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fn darwin_utc() Time {
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epoch_ns := i64(C.clock_gettime_nsec_np(C.CLOCK_REALTIME))
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sec := epoch_ns / i64(second)
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nsec := int(epoch_ns % i64(second))
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return unix_nanosecond(sec, nsec)
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}
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// dummy to compile with all compilers
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fn solaris_now() Time {
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return Time{}
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}
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// dummy to compile with all compilers
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fn solaris_utc() Time {
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return Time{}
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}
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