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59ff172f80
This removes Linuxisms related to cpu_set_t validation from the generic NPTL code and puts them into a new sysdeps header file.
49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
/* Validate cpu_set_t values for NPTL. Linux version.
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Copyright (C) 2002-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <errno.h>
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/* Defined in pthread_setaffinity.c. */
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extern size_t __kernel_cpumask_size attribute_hidden;
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extern int __determine_cpumask_size (pid_t tid);
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/* Returns 0 if CS and SZ are valid values for the cpuset and cpuset size
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respectively. Otherwise it returns an error number. */
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static inline int
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check_cpuset_attr (const cpu_set_t *cs, const size_t sz)
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{
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if (__kernel_cpumask_size == 0)
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{
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int res = __determine_cpumask_size (THREAD_SELF->tid);
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if (res)
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return res;
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}
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/* Check whether the new bitmask has any bit set beyond the
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last one the kernel accepts. */
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for (size_t cnt = __kernel_cpumask_size; cnt < sz; ++cnt)
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if (((char *) cs)[cnt] != '\0')
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/* Found a nonzero byte. This means the user request cannot be
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fulfilled. */
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return EINVAL;
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return 0;
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}
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