mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-27 14:58:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Improve Windows sleep accuracy from 15ms to 15µs

Browse source
This commit is contained in:
Justine Tunney 2024-12-06 23:00:07 -08:00
parent b40140e6c5
commit b490e23d63
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
16 changed files with 189 additions and 67 deletions
Download patch file Download diff file Expand all files Collapse all files

2
libc/intrin/getminsigstksz.c
View file

@ -26,7 +26,7 @@ long __get_minsigstksz(void) {
struct AuxiliaryValue x;
x = __getauxval(AT_MINSIGSTKSZ);
if (x.isfound) {
return MAX(_MINSIGSTKSZ, x.value);
return MAX(_MINSIGSTKSZ - 1024, x.value) + 1024;
} else {
return _MINSIGSTKSZ;
}

11
libc/intrin/timespectowindowstime.c
View file

@ -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;
}