mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
fbc053e018
- Introduce __assert_disable global - Improve strsignal() thread safety - Make system call tracing thread safe - Fix SO_RCVTIMEO / SO_SNDTIMEO on Windows - Refactor DescribeFoo() functions into one place - Fix fork() on Windows when TLS and MAP_STACK exist - Round upwards in setsockopt(SO_RCVTIMEO) on Windows - Disable futexes on OpenBSD which seem extremely broken - Implement a better kludge for monotonic time on Windows
67 lines
3.2 KiB
C
67 lines
3.2 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/bits/likely.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/fmt/conv.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/spinlock.h"
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#include "libc/nexgen32e/rdtsc.h"
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#include "libc/nexgen32e/threaded.h"
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#include "libc/nexgen32e/x86feature.h"
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#include "libc/nt/struct/filetime.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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#include "libc/time/clockstonanos.internal.h"
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textwindows int sys_clock_gettime_nt(int clockid, struct timespec *ts) {
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uint64_t nanos;
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static bool once;
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static char lock;
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struct timespec res;
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static uint64_t base;
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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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X86_HAVE(INVTSC)) {
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// this routine stops being monotonic after 194 years of uptime
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if (__threaded) _spinlock(&lock);
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if (UNLIKELY(!once)) {
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GetSystemTimeAsFileTime(&ft);
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mono = FileTimeToTimeSpec(ft);
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base = rdtsc();
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once = true;
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}
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nanos = ClocksToNanos(rdtsc(), base);
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res = mono;
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res.tv_sec += nanos / 1000000000;
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res.tv_nsec += nanos % 1000000000;
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_spunlock(&lock);
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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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