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/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthreadP.h>
#include <string.h>
#include <sysdep.h>
#include <sys/types.h>
#include <sys/param.h>
#include <shlib-compat.h>
int
__pthread_attr_getaffinity_new (const pthread_attr_t *attr, size_t cpusetsize,
cpu_set_t *cpuset)
{
const struct pthread_attr *iattr;
iattr = (const struct pthread_attr *) attr;
if (iattr->extension != NULL && iattr->extension->cpuset != NULL)
{
/* Check whether there are any bits set beyond the limits
the user requested. */
for (size_t cnt = cpusetsize; cnt < iattr->extension->cpusetsize; ++cnt)
if (((char *) iattr->extension->cpuset)[cnt] != 0)
return EINVAL;
/* Copy over the cpuset from the thread attribute object. Limit the copy
to the minimum of the source and destination sizes to prevent a buffer
overrun. If the destination is larger, fill the remaining space with
zeroes. */
void *p = mempcpy (cpuset, iattr->extension->cpuset,
MIN (iattr->extension->cpusetsize, cpusetsize));
if (cpusetsize > iattr->extension->cpusetsize)
memset (p, '\0', cpusetsize - iattr->extension->cpusetsize);
}
else
/* We have no information. */
memset (cpuset, -1, cpusetsize);
return 0;
}
versioned_symbol (libpthread, __pthread_attr_getaffinity_new,
pthread_attr_getaffinity_np, GLIBC_2_3_4);
#if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4)
int
__pthread_attr_getaffinity_old (const pthread_attr_t *attr, cpu_set_t *cpuset)
{
/* The old interface by default assumed a 1024 processor bitmap. */
return __pthread_attr_getaffinity_new (attr, 128, cpuset);
}
compat_symbol (libpthread, __pthread_attr_getaffinity_old,
pthread_attr_getaffinity_np, GLIBC_2_3_3);
#endif
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