1/* Copyright (C) 2003-2021 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 <https://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
29int
30__pthread_getaffinity_np (pthread_t th, size_t cpusetsize, cpu_set_t *cpuset)
31{
32 const struct pthread *pd = (const struct pthread *) th;
33
34 int res = INTERNAL_SYSCALL_CALL (sched_getaffinity, pd->tid,
35 MIN (INT_MAX, cpusetsize), cpuset);
36 if (INTERNAL_SYSCALL_ERROR_P (res))
37 return INTERNAL_SYSCALL_ERRNO (res);
38
39 /* Clean the rest of the memory the kernel didn't do. */
40 memset ((char *) cpuset + res, '\0', cpusetsize - res);
41
42 return 0;
43}
44libc_hidden_def (__pthread_getaffinity_np)
45versioned_symbol (libc, __pthread_getaffinity_np, pthread_getaffinity_np,
46 GLIBC_2_32);
47
48#if SHLIB_COMPAT (libc, GLIBC_2_3_4, GLIBC_2_32)
49strong_alias (__pthread_getaffinity_np, __pthread_getaffinity_alias)
50compat_symbol (libc, __pthread_getaffinity_alias, pthread_getaffinity_np,
51 GLIBC_2_3_4);
52#endif
53
54#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
55int
56__pthread_getaffinity_old (pthread_t th, cpu_set_t *cpuset)
57{
58 /* The old interface by default assumed a 1024 processor bitmap. */
59 return __pthread_getaffinity_np (th, 128, cpuset);
60}
61compat_symbol (libc, __pthread_getaffinity_old, pthread_getaffinity_np,
62 GLIBC_2_3_3);
63#endif
64