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41 lines
820 B
V
41 lines
820 B
V
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module time
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#include <mach/mach_time.h>
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const (
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// start_time is needed on Darwin and Windows because of potential overflows
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start_time = C.mach_absolute_time()
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time_base = init_time_base()
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)
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[typedef]
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struct C.mach_timebase_info_data_t {
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numer u64
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denom u64
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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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struct InternalTimeBase {
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numer u64
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denom u64
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}
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fn init_time_base() InternalTimeBase {
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mut tb := C.mach_timebase_info_data_t{}
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C.mach_timebase_info(&tb)
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return InternalTimeBase{numer:tb.numer, denom:tb.denom}
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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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return mul_div(tm - start_time, time_base.numer, time_base.denom)
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}
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fn mul_div(val, numer, denom u64) u64 {
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q := val / denom
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r := val % denom
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return q * numer + r * numer / denom
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}
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