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 <stdlib.h>
22#include <string.h>
23#include <pthreadP.h>
24#include <shlib-compat.h>
25
26
27int
28__pthread_attr_setaffinity_np (pthread_attr_t *attr, size_t cpusetsize,
29 const cpu_set_t *cpuset)
30{
31 struct pthread_attr *iattr;
32
33 iattr = (struct pthread_attr *) attr;
34
35 if (cpuset == NULL || cpusetsize == 0)
36 {
37 if (iattr->extension != NULL)
38 {
39 free (iattr->extension->cpuset);
40 iattr->extension->cpuset = NULL;
41 iattr->extension->cpusetsize = 0;
42 }
43 }
44 else
45 {
46 int ret = __pthread_attr_extension (iattr);
47 if (ret != 0)
48 return ret;
49
50 if (iattr->extension->cpusetsize != cpusetsize)
51 {
52 void *newp = realloc (iattr->extension->cpuset, cpusetsize);
53 if (newp == NULL)
54 return ENOMEM;
55
56 iattr->extension->cpuset = newp;
57 iattr->extension->cpusetsize = cpusetsize;
58 }
59
60 memcpy (iattr->extension->cpuset, cpuset, cpusetsize);
61 }
62
63 return 0;
64}
65libc_hidden_def (__pthread_attr_setaffinity_np)
66versioned_symbol (libc, __pthread_attr_setaffinity_np,
67 pthread_attr_setaffinity_np, GLIBC_2_32);
68
69
70#if SHLIB_COMPAT (libc, GLIBC_2_3_4, GLIBC_2_32)
71/* Compat symbol with the old libc version. */
72strong_alias (__pthread_attr_setaffinity_np, __pthread_attr_setaffinity_alias)
73compat_symbol (libc, __pthread_attr_setaffinity_alias,
74 pthread_attr_setaffinity_np, GLIBC_2_3_4);
75#endif
76
77#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
78int
79__pthread_attr_setaffinity_old (pthread_attr_t *attr, cpu_set_t *cpuset)
80{
81 /* The old interface by default assumed a 1024 processor bitmap. */
82 return __pthread_attr_setaffinity_np (attr, 128, cpuset);
83}
84compat_symbol (libc, __pthread_attr_setaffinity_old,
85 pthread_attr_setaffinity_np, GLIBC_2_3_3);
86#endif
87