1 /* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include <sys/types.h>
24 #include <sys/syscall.h>
27 #include <sys/param.h>
30 #if defined __NR_sched_setaffinity
32 #define __NR___syscall_sched_setaffinity __NR_sched_setaffinity
33 static __inline__ _syscall3(int, __syscall_sched_setaffinity, __kernel_pid_t, pid,
34 size_t, cpusetsize, cpu_set_t *, cpuset)
36 static size_t __kernel_cpumask_size;
38 int sched_setaffinity(pid_t pid, size_t cpusetsize, const cpu_set_t *cpuset)
41 if (unlikely (__kernel_cpumask_size == 0)) {
42 INTERNAL_SYSCALL_DECL (err);
45 void *p = alloca (psize);
47 while (res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, getpid (),
49 INTERNAL_SYSCALL_ERROR_P (res, err)
50 && INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL)
51 p = extend_alloca (p, psize, 2 * psize);
53 if (res == 0 || INTERNAL_SYSCALL_ERROR_P (res, err)) {
54 __set_errno (INTERNAL_SYSCALL_ERRNO (res, err));
58 __kernel_cpumask_size = res;
61 /* We now know the size of the kernel cpumask_t. Make sure the user
62 does not request to set a bit beyond that. */
63 for (cnt = __kernel_cpumask_size; cnt < cpusetsize; ++cnt)
64 if (((char *) cpuset)[cnt] != '\0') {
65 /* Found a nonzero byte. This means the user request cannot be
71 return INLINE_SYSCALL (sched_setaffinity, 3, pid, cpusetsize, cpuset);
74 #define ___HAVE_NO_sched_setaffinity
77 #if defined ___HAVE_NO_sched_setaffinity && defined __UCLIBC_HAS_STUBS__
78 int sched_setaffinity(pid_t pid, size_t cpusetsize, const cpu_set_t *cpuset)
85 #endif /* __USE_GNU */