summaryrefslogtreecommitdiff
path: root/libpthread/nptl/sysdeps/unix/sysv/linux/pthread_getaffinity.c
blob: 57a903a60b9134a1fcf89f44430e512cfa28c387 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <limits.h>
#include <pthreadP.h>
#include <string.h>
#include <sysdep.h>
#include <sys/param.h>
#include <sys/types.h>


int
__pthread_getaffinity_np (pthread_t th, size_t cpusetsize, cpu_set_t *cpuset)
{
  const struct pthread *pd = (const struct pthread *) th;

  INTERNAL_SYSCALL_DECL (err);
  int res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, pd->tid,
			      MIN (INT_MAX, cpusetsize), cpuset);
  if (INTERNAL_SYSCALL_ERROR_P (res, err))
    return INTERNAL_SYSCALL_ERRNO (res, err);

  /* Clean the rest of the memory the kernel didn't do.  */
  memset ((char *) cpuset + res, '\0', cpusetsize - res);

  return 0;
}
strong_alias(__pthread_getaffinity_np, pthread_getaffinity_np)