1/* Copyright (C) 2002-2022 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 <sched.h>
20#include <string.h>
21#include <sysdep.h>
22#include <sys/param.h>
23#include <sys/types.h>
24#include <shlib-compat.h>
25
26
27#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
28extern int __sched_getaffinity_new (pid_t, size_t, cpu_set_t *);
29libc_hidden_proto (__sched_getaffinity_new)
30#endif
31
32int
33__sched_getaffinity_new (pid_t pid, size_t cpusetsize, cpu_set_t *cpuset)
34{
35 int res = INLINE_SYSCALL (sched_getaffinity, 3, pid,
36 MIN (INT_MAX, cpusetsize), cpuset);
37 if (res != -1)
38 {
39 /* Clean the rest of the memory the kernel didn't do. */
40 memset ((char *) cpuset + res, '\0', cpusetsize - res);
41
42 res = 0;
43 }
44 return res;
45}
46versioned_symbol (libc, __sched_getaffinity_new, sched_getaffinity,
47 GLIBC_2_3_4);
48
49
50#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
51libc_hidden_def (__sched_getaffinity_new)
52
53int
54attribute_compat_text_section
55__sched_getaffinity_old (pid_t pid, cpu_set_t *cpuset)
56{
57 /* The old interface by default assumed a 1024 processor bitmap. */
58 return __sched_getaffinity_new (pid, 128, cpuset);
59}
60compat_symbol (libc, __sched_getaffinity_old, sched_getaffinity, GLIBC_2_3_3);
61#endif
62