| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1991-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <stddef.h> |
| 19 | #include <sys/vtimes.h> |
| 20 | #include <sys/resource.h> |
| 21 | |
| 22 | /* Return the number of 1/VTIMES_UNITS_PER_SECOND-second |
| 23 | units in the `struct timeval' TV. */ |
| 24 | #define TIMEVAL_TO_VTIMES(tv) \ |
| 25 | ((tv.tv_sec * VTIMES_UNITS_PER_SECOND) + \ |
| 26 | (tv.tv_usec * VTIMES_UNITS_PER_SECOND / 1000000)) |
| 27 | |
| 28 | /* If VT is not NULL, write statistics for WHO into *VT. |
| 29 | Return 0 for success, -1 for failure. */ |
| 30 | static int |
| 31 | vtimes_one (struct vtimes *vt, enum __rusage_who who) |
| 32 | { |
| 33 | if (vt != NULL) |
| 34 | { |
| 35 | struct rusage usage; |
| 36 | |
| 37 | if (__getrusage (who, &usage) < 0) |
| 38 | return -1; |
| 39 | |
| 40 | vt->vm_utime = TIMEVAL_TO_VTIMES (usage.ru_utime); |
| 41 | vt->vm_stime = TIMEVAL_TO_VTIMES (usage.ru_stime); |
| 42 | vt->vm_idsrss = usage.ru_idrss + usage.ru_isrss; |
| 43 | vt->vm_majflt = usage.ru_majflt; |
| 44 | vt->vm_minflt = usage.ru_minflt; |
| 45 | vt->vm_nswap = usage.ru_nswap; |
| 46 | vt->vm_inblk = usage.ru_inblock; |
| 47 | vt->vm_oublk = usage.ru_oublock; |
| 48 | } |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | /* If CURRENT is not NULL, write statistics for the current process into |
| 53 | *CURRENT. If CHILD is not NULL, write statistics for all terminated child |
| 54 | processes into *CHILD. Returns 0 for success, -1 for failure. */ |
| 55 | int |
| 56 | vtimes (struct vtimes *current, struct vtimes *child) |
| 57 | { |
| 58 | if (vtimes_one (current, RUSAGE_SELF) < 0 |
| 59 | || vtimes_one (child, RUSAGE_CHILDREN) < 0) |
| 60 | return -1; |
| 61 | return 0; |
| 62 | } |