102 lines
3.4 KiB
C
102 lines
3.4 KiB
C
/* Copyright (C) 1991-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <sys/resource.h>
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#include <shlib-compat.h>
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_33)
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/* Granularity of the `vm_utime' and `vm_stime' fields of a `struct vtimes'.
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(This is the frequency of the machine's power supply, in Hz.) */
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# define VTIMES_UNITS_PER_SECOND 60
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struct vtimes
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{
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/* User time used in units of 1/VTIMES_UNITS_PER_SECOND seconds. */
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int vm_utime;
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/* System time used in units of 1/VTIMES_UNITS_PER_SECOND seconds. */
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int vm_stime;
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/* Amount of data and stack memory used (kilobyte-seconds). */
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unsigned int vm_idsrss;
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/* Amount of text memory used (kilobyte-seconds). */
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unsigned int vm_ixrss;
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/* Maximum resident set size (text, data, and stack) (kilobytes). */
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int vm_maxrss;
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/* Number of hard page faults (i.e. those that required I/O). */
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int vm_majflt;
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/* Number of soft page faults (i.e. those serviced by reclaiming
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a page from the list of pages awaiting reallocation. */
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int vm_minflt;
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/* Number of times a process was swapped out of physical memory. */
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int vm_nswap;
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/* Number of input operations via the file system. Note: This
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and `ru_oublock' do not include operations with the cache. */
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int vm_inblk;
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/* Number of output operations via the file system. */
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int vm_oublk;
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};
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/* Return the number of 1/VTIMES_UNITS_PER_SECOND-second
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units in the `struct timeval' TV. */
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# define TIMEVAL_TO_VTIMES(tv) \
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((tv.tv_sec * VTIMES_UNITS_PER_SECOND) \
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+ (tv.tv_usec * VTIMES_UNITS_PER_SECOND / 1000000))
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/* If VT is not NULL, write statistics for WHO into *VT.
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Return 0 for success, -1 for failure. */
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static int
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vtimes_one (struct vtimes *vt, enum __rusage_who who)
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{
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if (vt != NULL)
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{
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struct rusage usage;
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if (__getrusage (who, &usage) < 0)
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return -1;
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vt->vm_utime = TIMEVAL_TO_VTIMES (usage.ru_utime);
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vt->vm_stime = TIMEVAL_TO_VTIMES (usage.ru_stime);
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vt->vm_idsrss = usage.ru_idrss + usage.ru_isrss;
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vt->vm_majflt = usage.ru_majflt;
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vt->vm_minflt = usage.ru_minflt;
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vt->vm_nswap = usage.ru_nswap;
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vt->vm_inblk = usage.ru_inblock;
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vt->vm_oublk = usage.ru_oublock;
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}
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return 0;
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}
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/* If CURRENT is not NULL, write statistics for the current process into
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*CURRENT. If CHILD is not NULL, write statistics for all terminated child
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processes into *CHILD. Returns 0 for success, -1 for failure. */
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int
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__vtimes (struct vtimes *current, struct vtimes *child)
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{
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if (vtimes_one (current, RUSAGE_SELF) < 0
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|| vtimes_one (child, RUSAGE_CHILDREN) < 0)
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return -1;
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return 0;
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}
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compat_symbol (libc, __vtimes, vtimes, GLIBC_2_0);
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#endif /* SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_33) */
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