1 | /* Copyright (C) 2007-2018 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 <errno.h> |
19 | #include <sched.h> |
20 | #include <sysdep.h> |
21 | |
22 | #ifdef HAVE_GETCPU_VSYSCALL |
23 | # define HAVE_VSYSCALL |
24 | #endif |
25 | #include <sysdep-vdso.h> |
26 | |
27 | int |
28 | sched_getcpu (void) |
29 | { |
30 | #ifdef __NR_getcpu |
31 | unsigned int cpu; |
32 | int r = INLINE_VSYSCALL (getcpu, 3, &cpu, NULL, NULL); |
33 | |
34 | return r == -1 ? r : cpu; |
35 | #else |
36 | __set_errno (ENOSYS); |
37 | return -1; |
38 | #endif |
39 | } |
40 | |