1 | /* Copyright (C) 2003-2019 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. |
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 <limits.h> |
21 | #include <pthreadP.h> |
22 | #include <string.h> |
23 | #include <sysdep.h> |
24 | #include <sys/param.h> |
25 | #include <sys/types.h> |
26 | #include <shlib-compat.h> |
27 | |
28 | |
29 | int |
30 | __pthread_getaffinity_new (pthread_t th, size_t cpusetsize, cpu_set_t *cpuset) |
31 | { |
32 | const struct pthread *pd = (const struct pthread *) th; |
33 | |
34 | INTERNAL_SYSCALL_DECL (err); |
35 | int res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, pd->tid, |
36 | MIN (INT_MAX, cpusetsize), cpuset); |
37 | if (INTERNAL_SYSCALL_ERROR_P (res, err)) |
38 | return INTERNAL_SYSCALL_ERRNO (res, err); |
39 | |
40 | /* Clean the rest of the memory the kernel didn't do. */ |
41 | memset ((char *) cpuset + res, '\0', cpusetsize - res); |
42 | |
43 | return 0; |
44 | } |
45 | strong_alias (__pthread_getaffinity_new, __pthread_getaffinity_np) |
46 | versioned_symbol (libpthread, __pthread_getaffinity_new, |
47 | pthread_getaffinity_np, GLIBC_2_3_4); |
48 | |
49 | |
50 | #if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4) |
51 | int |
52 | __pthread_getaffinity_old (pthread_t th, cpu_set_t *cpuset) |
53 | { |
54 | /* The old interface by default assumed a 1024 processor bitmap. */ |
55 | return __pthread_getaffinity_new (th, 128, cpuset); |
56 | } |
57 | compat_symbol (libpthread, __pthread_getaffinity_old, pthread_getaffinity_np, |
58 | GLIBC_2_3_3); |
59 | #endif |
60 | |