| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Get a clockid_t for the process CPU clock of a given process. Generic. |
| 2 | Copyright (C) 2000-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <time.h> |
| 21 | #include <unistd.h> |
| 22 | |
| 23 | int |
| 24 | __clock_getcpuclockid (pid_t pid, clockid_t *clock_id) |
| 25 | { |
| 26 | /* We don't allow any process ID but our own. */ |
| 27 | if (pid != 0 && pid != getpid ()) |
| 28 | return EPERM; |
| 29 | |
| 30 | #ifdef CLOCK_PROCESS_CPUTIME_ID |
| 31 | /* Store the number. */ |
| 32 | *clock_id = CLOCK_PROCESS_CPUTIME_ID; |
| 33 | |
| 34 | return 0; |
| 35 | #else |
| 36 | /* We don't have a timer for that. */ |
| 37 | return ENOENT; |
| 38 | #endif |
| 39 | } |
| 40 | weak_alias (__clock_getcpuclockid, clock_getcpuclockid) |