96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pthreadP.h>
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#include <shlib-compat.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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int
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__pthread_attr_setaffinity_new (pthread_attr_t *attr, size_t cpusetsize,
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const cpu_set_t *cpuset)
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{
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struct pthread_attr *iattr;
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assert (sizeof (*attr) >= sizeof (struct pthread_attr));
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iattr = (struct pthread_attr *) attr;
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if (cpuset == NULL || cpusetsize == 0)
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{
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free (iattr->cpuset);
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iattr->cpuset = NULL;
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iattr->cpusetsize = 0;
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}
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else
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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 != 0)
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/* Some serious problem. */
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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 < cpusetsize; ++cnt)
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if (((char *) cpuset)[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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if (iattr->cpusetsize != cpusetsize)
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{
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void *newp = (cpu_set_t *) realloc (iattr->cpuset, cpusetsize);
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if (newp == NULL)
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return ENOMEM;
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iattr->cpuset = newp;
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iattr->cpusetsize = cpusetsize;
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}
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memcpy (iattr->cpuset, cpuset, cpusetsize);
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}
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return 0;
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}
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versioned_symbol (libpthread, __pthread_attr_setaffinity_new,
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pthread_attr_setaffinity_np, GLIBC_2_3_4);
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#if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4)
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int
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__pthread_attr_setaffinity_old (pthread_attr_t *attr, cpu_set_t *cpuset)
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{
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/* The old interface by default assumed a 1024 processor bitmap. */
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return __pthread_attr_setaffinity_new (attr, 128, cpuset);
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}
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compat_symbol (libpthread, __pthread_attr_setaffinity_old,
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pthread_attr_setaffinity_np, GLIBC_2_3_3);
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#endif
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