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75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/* Copyright (C) 2003-2017 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, see
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<http://www.gnu.org/licenses/>. */
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#include <assert.h>
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#include <errno.h>
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#include <pthreadP.h>
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#include <string.h>
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#include <sysdep.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <shlib-compat.h>
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int
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__pthread_attr_getaffinity_new (const pthread_attr_t *attr, size_t cpusetsize,
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cpu_set_t *cpuset)
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{
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const struct pthread_attr *iattr;
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assert (sizeof (*attr) >= sizeof (struct pthread_attr));
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iattr = (const struct pthread_attr *) attr;
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if (iattr->cpuset != NULL)
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{
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/* Check whether there are any bits set beyond the limits
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the user requested. */
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for (size_t cnt = cpusetsize; cnt < iattr->cpusetsize; ++cnt)
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if (((char *) iattr->cpuset)[cnt] != 0)
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return EINVAL;
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/* Copy over the cpuset from the thread attribute object. Limit the copy
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to the minimum of the source and destination sizes to prevent a buffer
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overrun. If the destination is larger, fill the remaining space with
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zeroes. */
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void *p = mempcpy (cpuset, iattr->cpuset,
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MIN (iattr->cpusetsize, cpusetsize));
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if (cpusetsize > iattr->cpusetsize)
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memset (p, '\0', cpusetsize - iattr->cpusetsize);
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}
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else
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/* We have no information. */
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memset (cpuset, -1, cpusetsize);
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return 0;
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}
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versioned_symbol (libpthread, __pthread_attr_getaffinity_new,
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pthread_attr_getaffinity_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_getaffinity_old (const 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_getaffinity_new (attr, 128, cpuset);
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}
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compat_symbol (libpthread, __pthread_attr_getaffinity_old,
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pthread_attr_getaffinity_np, GLIBC_2_3_3);
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#endif
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