1 /* Copyright (C) 2003-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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.
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.
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/>. */
24 #include <sys/types.h>
25 #include <shlib-compat.h>
29 __pthread_attr_getaffinity_new (const pthread_attr_t
*attr
, size_t cpusetsize
,
32 const struct pthread_attr
*iattr
;
34 assert (sizeof (*attr
) >= sizeof (struct pthread_attr
));
35 iattr
= (const struct pthread_attr
*) attr
;
37 if (iattr
->cpuset
!= NULL
)
39 /* Check whether there are any bits set beyond the limits
40 the user requested. */
41 for (size_t cnt
= cpusetsize
; cnt
< iattr
->cpusetsize
; ++cnt
)
42 if (((char *) iattr
->cpuset
)[cnt
] != 0)
45 /* Copy over the cpuset from the thread attribute object. Limit the copy
46 to the minimum of the source and destination sizes to prevent a buffer
47 overrun. If the destination is larger, fill the remaining space with
49 void *p
= mempcpy (cpuset
, iattr
->cpuset
,
50 MIN (iattr
->cpusetsize
, cpusetsize
));
51 if (cpusetsize
> iattr
->cpusetsize
)
52 memset (p
, '\0', cpusetsize
- iattr
->cpusetsize
);
55 /* We have no information. */
56 memset (cpuset
, -1, cpusetsize
);
60 versioned_symbol (libpthread
, __pthread_attr_getaffinity_new
,
61 pthread_attr_getaffinity_np
, GLIBC_2_3_4
);
64 #if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4)
66 __pthread_attr_getaffinity_old (const pthread_attr_t
*attr
, cpu_set_t
*cpuset
)
68 /* The old interface by default assumed a 1024 processor bitmap. */
69 return __pthread_attr_getaffinity_new (attr
, 128, cpuset
);
71 compat_symbol (libpthread
, __pthread_attr_getaffinity_old
,
72 pthread_attr_getaffinity_np
, GLIBC_2_3_3
);