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04277e02 | 1 | /* Copyright (C) 2003-2019 Free Software Foundation, Inc. |
80f536db UD |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
80f536db | 18 | |
80f536db UD |
19 | #include <errno.h> |
20 | #include <pthreadP.h> | |
21 | #include <string.h> | |
22 | #include <sysdep.h> | |
23 | #include <sys/types.h> | |
ca06321d | 24 | #include <sys/param.h> |
439ff07b | 25 | #include <shlib-compat.h> |
80f536db UD |
26 | |
27 | ||
28 | int | |
439ff07b UD |
29 | __pthread_attr_getaffinity_new (const pthread_attr_t *attr, size_t cpusetsize, |
30 | cpu_set_t *cpuset) | |
80f536db | 31 | { |
439ff07b | 32 | const struct pthread_attr *iattr; |
80f536db | 33 | |
439ff07b | 34 | iattr = (const struct pthread_attr *) attr; |
80f536db | 35 | |
439ff07b UD |
36 | if (iattr->cpuset != NULL) |
37 | { | |
38 | /* Check whether there are any bits set beyond the limits | |
39 | the user requested. */ | |
40 | for (size_t cnt = cpusetsize; cnt < iattr->cpusetsize; ++cnt) | |
41 | if (((char *) iattr->cpuset)[cnt] != 0) | |
42 | return EINVAL; | |
43 | ||
5865a56b SP |
44 | /* Copy over the cpuset from the thread attribute object. Limit the copy |
45 | to the minimum of the source and destination sizes to prevent a buffer | |
46 | overrun. If the destination is larger, fill the remaining space with | |
47 | zeroes. */ | |
48 | void *p = mempcpy (cpuset, iattr->cpuset, | |
49 | MIN (iattr->cpusetsize, cpusetsize)); | |
439ff07b UD |
50 | if (cpusetsize > iattr->cpusetsize) |
51 | memset (p, '\0', cpusetsize - iattr->cpusetsize); | |
52 | } | |
06f6ca90 | 53 | else |
439ff07b UD |
54 | /* We have no information. */ |
55 | memset (cpuset, -1, cpusetsize); | |
80f536db UD |
56 | |
57 | return 0; | |
58 | } | |
439ff07b UD |
59 | versioned_symbol (libpthread, __pthread_attr_getaffinity_new, |
60 | pthread_attr_getaffinity_np, GLIBC_2_3_4); | |
61 | ||
62 | ||
8e32efa6 | 63 | #if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4) |
439ff07b UD |
64 | int |
65 | __pthread_attr_getaffinity_old (const pthread_attr_t *attr, cpu_set_t *cpuset) | |
66 | { | |
67 | /* The old interface by default assumed a 1024 processor bitmap. */ | |
68 | return __pthread_attr_getaffinity_new (attr, 128, cpuset); | |
69 | } | |
70 | compat_symbol (libpthread, __pthread_attr_getaffinity_old, | |
71 | pthread_attr_getaffinity_np, GLIBC_2_3_3); | |
72 | #endif |