cosmopolitan/libc/time/times.c

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2020-06-15 14:18:57 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/rusage.h"
#include "libc/calls/struct/timeval.h"
#include "libc/calls/struct/tms.h"
#include "libc/conv/conv.h"
#include "libc/dce.h"
#include "libc/nt/accounting.h"
#include "libc/nt/process.h"
#include "libc/nt/runtime.h"
#include "libc/nt/struct/filetime.h"
#include "libc/runtime/sysconf.h"
#include "libc/sysv/consts/rusage.h"
#include "libc/time/time.h"
/**
* Returns accounting data for process on time-sharing system.
*/
long times(struct tms *out_times) {
struct timeval tv;
long tick = sysconf(_SC_CLK_TCK);
if (!IsWindows()) {
struct rusage ru;
if (getrusage(RUSAGE_SELF, &ru) == -1) return -1;
out_times->tms_utime = convertmicros(&ru.ru_utime, tick);
out_times->tms_stime = convertmicros(&ru.ru_stime, tick);
if (getrusage(RUSAGE_CHILDREN, &ru) == -1) return -1;
out_times->tms_cutime = convertmicros(&ru.ru_utime, tick);
out_times->tms_cstime = convertmicros(&ru.ru_stime, tick);
} else {
struct NtFileTime CreationFileTime;
struct NtFileTime ExitFileTime;
struct NtFileTime KernelFileTime;
struct NtFileTime UserFileTime;
if (!GetProcessTimes(GetCurrentProcess(), &CreationFileTime, &ExitFileTime,
&KernelFileTime, &UserFileTime)) {
return winerr();
}
filetimetotimeval(&tv, UserFileTime);
out_times->tms_utime = convertmicros(&tv, tick);
filetimetotimeval(&tv, KernelFileTime);
out_times->tms_stime = convertmicros(&tv, tick);
out_times->tms_cutime = 0;
out_times->tms_cstime = 0;
}
if (gettimeofday(&tv, NULL) == -1) return -1;
return convertmicros(&tv, tick);
}