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6e6249d0 | 1 | /* Get a clockid_t for the process CPU clock of a given process. Generic. |
bfff8b1b | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
ebbad4cc | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
ebbad4cc | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 9 | |
ebbad4cc UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
28f540f4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 18 | |
b6ab06ce UD |
19 | #include <errno.h> |
20 | #include <time.h> | |
28f540f4 | 21 | #include <unistd.h> |
28f540f4 | 22 | |
b6ab06ce | 23 | int |
89fb6835 | 24 | __clock_getcpuclockid (pid_t pid, clockid_t *clock_id) |
28f540f4 | 25 | { |
b6ab06ce UD |
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; | |
28f540f4 | 33 | |
b6ab06ce UD |
34 | return 0; |
35 | #else | |
36 | /* We don't have a timer for that. */ | |
37 | return ENOENT; | |
38 | #endif | |
39 | } | |
89fb6835 | 40 | weak_alias (__clock_getcpuclockid, clock_getcpuclockid) |