1 /* Copyright (C) 2003, 2004 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 <http://www.gnu.org/licenses/>. */
18
19 #include <assert.h>
20 #include <errno.h>
21 #include <pthreadP.h>
22 #include <string.h>
23 #include <sysdep.h>
24 #include <sys/types.h>
25
26
27 int
pthread_attr_getaffinity_np(const pthread_attr_t * attr,size_t cpusetsize,cpu_set_t * cpuset)28 pthread_attr_getaffinity_np(const pthread_attr_t *attr, size_t cpusetsize,
29 cpu_set_t *cpuset)
30 {
31 const struct pthread_attr *iattr;
32
33 assert (sizeof (*attr) >= sizeof (struct pthread_attr));
34 iattr = (const struct pthread_attr *) attr;
35
36 if (iattr->cpuset != NULL)
37 {
38 /* Check whether there are any bits set beyond the limits
39 the user requested. */
40 size_t cnt;
41 for (cnt = cpusetsize; cnt < iattr->cpusetsize; ++cnt)
42 if (((char *) iattr->cpuset)[cnt] != 0)
43 return EINVAL;
44
45 void *p = mempcpy (cpuset, iattr->cpuset, iattr->cpusetsize);
46 if (cpusetsize > iattr->cpusetsize)
47 memset (p, '\0', cpusetsize - iattr->cpusetsize);
48 }
49 else
50 /* We have no information. */
51 memset (cpuset, -1, cpusetsize);
52
53 return 0;
54 }
55