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/* Copyright (C) 2003-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <limits.h>
#include <pthreadP.h>
#include <string.h>
#include <sysdep.h>
#include <sys/param.h>
#include <sys/types.h>
#include <shlib-compat.h>
int
__pthread_getaffinity_np (pthread_t th, size_t cpusetsize, cpu_set_t *cpuset)
{
const struct pthread *pd = (const struct pthread *) th;
int res = INTERNAL_SYSCALL_CALL (sched_getaffinity, pd->tid,
MIN (INT_MAX, cpusetsize), cpuset);
if (INTERNAL_SYSCALL_ERROR_P (res))
return INTERNAL_SYSCALL_ERRNO (res);
/* Clean the rest of the memory the kernel didn't do. */
memset ((char *) cpuset + res, '\0', cpusetsize - res);
return 0;
}
libc_hidden_def (__pthread_getaffinity_np)
versioned_symbol (libc, __pthread_getaffinity_np, pthread_getaffinity_np,
GLIBC_2_32);
#if SHLIB_COMPAT (libc, GLIBC_2_3_4, GLIBC_2_32)
strong_alias (__pthread_getaffinity_np, __pthread_getaffinity_alias)
compat_symbol (libc, __pthread_getaffinity_alias, pthread_getaffinity_np,
GLIBC_2_3_4);
#endif
#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
int
__pthread_getaffinity_old (pthread_t th, cpu_set_t *cpuset)
{
/* The old interface by default assumed a 1024 processor bitmap. */
return __pthread_getaffinity_np (th, 128, cpuset);
}
compat_symbol (libc, __pthread_getaffinity_old, pthread_getaffinity_np,
GLIBC_2_3_3);
#endif
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