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Improve Windows sleep accuracy from 15ms to 15µs

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Justine Tunney 2024-12-06 23:00:07 -08:00
parent b40140e6c5
commit b490e23d63
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GPG key ID: BE714B4575D6E328
16 changed files with 189 additions and 67 deletions
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11
libc/intrin/timespectowindowstime.c
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@ -17,7 +17,14 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/fmt/wintime.internal.h"
#include "libc/limits.h"
#include "libc/stdckdint.h"
int64_t TimeSpecToWindowsTime(struct timespec t) {
return t.tv_nsec / 100 + (t.tv_sec + MODERNITYSECONDS) * HECTONANOSECONDS;
int64_t TimeSpecToWindowsTime(struct timespec time) {
int64_t wt;
if (ckd_add(&wt, time.tv_sec, MODERNITYSECONDS) ||
ckd_mul(&wt, wt, HECTONANOSECONDS) ||
ckd_add(&wt, wt, time.tv_nsec / 100))
wt = INT64_MAX;
return wt;
}