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https://github.com/jart/cosmopolitan.git
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12d9e1e128
It now works most excellently across all supported operating sytsems (earlier it didn't work on NT and XNU). Demo code is available in examples/clock.c and this change also adds some of the newer ANSI C time functions like timespec_get(), plus timespec_getres() which hasn't even come out yet as it's C23
36 lines
2.2 KiB
C
36 lines
2.2 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 2022 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/calls/struct/timespec.h"
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#include "libc/sysv/consts/clock.h"
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#include "libc/time/time.h"
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/**
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* Returns high-precision timestamp, the C11 way.
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*
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* @param ts receives `CLOCK_REALTIME` timestamp
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* @param base must be `TIME_UTC`
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* @return `base` on success, or `0` on failure
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*/
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int timespec_get(struct timespec *ts, int base) {
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if (base == TIME_UTC && !clock_gettime(CLOCK_REALTIME, ts)) {
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return base;
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} else {
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return 0;
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}
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}
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