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use more precise clocks in precise_time_ns when available #11233

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use more precise clocks in precise_time_ns when available #11233

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10 changes: 9 additions & 1 deletion src/rt/rust_builtin.c
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Original file line number Diff line number Diff line change
Expand Up @@ -189,7 +189,15 @@ rust_precise_time_ns(uint64_t *ns) {
*ns = (uint64_t)((ticks.QuadPart * ns_per_s) / ticks_per_s.QuadPart);
#else
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
#if defined(CLOCK_MONOTONIC_RAW)
const clockid_t id = CLOCK_MONOTONIC_RAW;
#elif defined(CLOCK_MONOTONIC_PRECISE)
const clockid_t id = CLOCK_MONOTONIC_PRECISE;
#else
const clockid_t id = CLOCK_MONOTONIC;
#endif

clock_gettime(id, &ts);
*ns = (uint64_t)(ts.tv_sec * ns_per_s + ts.tv_nsec);
#endif
}
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