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darwin: invoke mach_timebase_info only once #1325

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darwin: invoke mach_timebase_info only once #1325

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10 changes: 6 additions & 4 deletions src/unix/darwin.c
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Expand Up @@ -179,12 +179,14 @@ void uv__cf_loop_signal(uv_loop_t* loop, cf_loop_signal_cb cb, void* arg) {


uint64_t uv__hrtime(void) {
mach_timebase_info_data_t info;
static mach_timebase_info_data_t info;

if (mach_timebase_info(&info) != KERN_SUCCESS)
abort();
if ((ACCESS_ONCE(uint32_t, info.numer) == 0 ||
ACCESS_ONCE(uint32_t, info.denom) == 0) &&
mach_timebase_info(&info) != KERN_SUCCESS)
abort();

return mach_absolute_time() * info.numer / info.denom;
return mach_absolute_time() * info.numer / info.denom;
}


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