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6e6249d0 | 1 | /* Get a clockid_t for the process CPU clock of a given process. Generic. |
581c785b | 2 | Copyright (C) 2000-2022 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 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 18 | |
b6ab06ce UD |
19 | #include <errno.h> |
20 | #include <time.h> | |
28f540f4 | 21 | #include <unistd.h> |
7b5af2d8 | 22 | #include <shlib-compat.h> |
28f540f4 | 23 | |
b6ab06ce | 24 | int |
89fb6835 | 25 | __clock_getcpuclockid (pid_t pid, clockid_t *clock_id) |
28f540f4 | 26 | { |
b6ab06ce UD |
27 | /* We don't allow any process ID but our own. */ |
28 | if (pid != 0 && pid != getpid ()) | |
29 | return EPERM; | |
30 | ||
31 | #ifdef CLOCK_PROCESS_CPUTIME_ID | |
32 | /* Store the number. */ | |
33 | *clock_id = CLOCK_PROCESS_CPUTIME_ID; | |
28f540f4 | 34 | |
b6ab06ce UD |
35 | return 0; |
36 | #else | |
37 | /* We don't have a timer for that. */ | |
38 | return ENOENT; | |
39 | #endif | |
40 | } | |
7b5af2d8 ZW |
41 | versioned_symbol (libc, __clock_getcpuclockid, clock_getcpuclockid, GLIBC_2_17); |
42 | /* clock_getcpuclockid moved to libc in version 2.17; | |
43 | old binaries may expect the symbol version it had in librt. */ | |
44 | #if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17) | |
0923f74a | 45 | compat_symbol (libc, __clock_getcpuclockid, clock_getcpuclockid, GLIBC_2_2); |
7b5af2d8 | 46 | #endif |