1/* Copyright (C) 2003-2023 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 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <limits.h>
20#include <pthreadP.h>
21#include <string.h>
22#include <sysdep.h>
23#include <sys/param.h>
24#include <sys/types.h>
25#include <shlib-compat.h>
26
27
28int
29__pthread_getaffinity_np (pthread_t th, size_t cpusetsize, cpu_set_t *cpuset)
30{
31 const struct pthread *pd = (const struct pthread *) th;
32
33 int res = INTERNAL_SYSCALL_CALL (sched_getaffinity, pd->tid,
34 MIN (INT_MAX, cpusetsize), cpuset);
35 if (INTERNAL_SYSCALL_ERROR_P (res))
36 return INTERNAL_SYSCALL_ERRNO (res);
37
38 /* Clean the rest of the memory the kernel didn't do. */
39 memset ((char *) cpuset + res, '\0', cpusetsize - res);
40
41 return 0;
42}
43libc_hidden_def (__pthread_getaffinity_np)
44versioned_symbol (libc, __pthread_getaffinity_np, pthread_getaffinity_np,
45 GLIBC_2_32);
46
47#if SHLIB_COMPAT (libc, GLIBC_2_3_4, GLIBC_2_32)
48strong_alias (__pthread_getaffinity_np, __pthread_getaffinity_alias)
49compat_symbol (libc, __pthread_getaffinity_alias, pthread_getaffinity_np,
50 GLIBC_2_3_4);
51#endif
52
53#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
54int
55__pthread_getaffinity_old (pthread_t th, cpu_set_t *cpuset)
56{
57 /* The old interface by default assumed a 1024 processor bitmap. */
58 return __pthread_getaffinity_np (th, 128, cpuset);
59}
60compat_symbol (libc, __pthread_getaffinity_old, pthread_getaffinity_np,
61 GLIBC_2_3_3);
62#endif
63