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Improve Windows sleep accuracy from 15ms to 15µs

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This commit is contained in:
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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4
libc/calls/sigsuspend.c
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@ -21,6 +21,7 @@
#include "libc/calls/sig.internal.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/struct/sigset.internal.h"
#include "libc/calls/struct/timespec.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
@ -59,8 +60,7 @@ int sigsuspend(const sigset_t *ignore) {
// using SetEvent() whereas it takes ~30us to use SuspendThread(),
// GetThreadContext(), SetThreadContext(), and ResumeThread().
BLOCK_SIGNALS;
while (!(rc = _park_norestart(-1u, waitmask)))
donothing;
rc = _park_norestart(timespec_max, waitmask);
ALLOW_SIGNALS;
} else {
rc = sys_sigsuspend((uint64_t[2]){waitmask}, 8);