35 lines
2.3 KiB
C
35 lines
2.3 KiB
C
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/*-*- 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 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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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 how much CPU program has consumed on time-sharing system.
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*
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* @return value that can be divided by CLOCKS_PER_SEC, or -1 w/ errno
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*/
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int64_t clock(void) {
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struct timespec ts;
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if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts) == -1) return -1;
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return ts.tv_sec * CLOCKS_PER_SEC +
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ts.tv_nsec / (1000000000 / CLOCKS_PER_SEC);
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}
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