mirror of
https://github.com/jart/cosmopolitan.git
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d44ff6ce1f
- Implement openpty() - Add `--assimilate` flag to APE bootloader - Restore Linux vDSO clock_gettime() support - Use `$(APE_NO_MODIFY_SELF)` on more programs
55 lines
2.8 KiB
C
55 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/fmt/conv.h"
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#include "libc/nexgen32e/rdtsc.h"
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#include "libc/nt/synchronization.h"
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#include "libc/sysv/consts/clock.h"
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#include "libc/sysv/errfuns.h"
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textwindows int sys_clock_gettime_nt(int clockid, struct timespec *ts) {
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int64_t ms;
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struct timespec res;
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struct NtFileTime ft;
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static struct timespec mono;
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if (!ts) return efault();
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if (clockid == CLOCK_REALTIME) {
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GetSystemTimeAsFileTime(&ft);
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*ts = FileTimeToTimeSpec(ft);
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return 0;
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} else if (clockid == CLOCK_MONOTONIC || clockid == CLOCK_MONOTONIC_RAW) {
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ms = GetTickCount64();
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res.tv_sec = ms / 1000;
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res.tv_nsec = ms % 1000 * 1000000;
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res.tv_nsec += rdtsc() / 3 % 1000000000;
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if (res.tv_nsec > 1000000000) {
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res.tv_nsec -= 1000000000;
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res.tv_sec += 1;
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}
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if (res.tv_sec > mono.tv_sec ||
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(res.tv_sec == mono.tv_sec && res.tv_nsec > mono.tv_nsec)) {
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mono = res;
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} else {
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res = mono;
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}
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*ts = res;
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return 0;
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} else {
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return einval();
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}
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}
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