mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 08:40:07 +00:00
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/* Copyright (C) 2003-2013 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <pthreadP.h>
|
|
#include <shlib-compat.h>
|
|
|
|
|
|
/* Defined in pthread_setaffinity.c. */
|
|
extern size_t __kernel_cpumask_size attribute_hidden;
|
|
extern int __determine_cpumask_size (pid_t tid);
|
|
|
|
|
|
int
|
|
__pthread_attr_setaffinity_new (pthread_attr_t *attr, size_t cpusetsize,
|
|
const cpu_set_t *cpuset)
|
|
{
|
|
struct pthread_attr *iattr;
|
|
|
|
assert (sizeof (*attr) >= sizeof (struct pthread_attr));
|
|
iattr = (struct pthread_attr *) attr;
|
|
|
|
if (cpuset == NULL || cpusetsize == 0)
|
|
{
|
|
free (iattr->cpuset);
|
|
iattr->cpuset = NULL;
|
|
iattr->cpusetsize = 0;
|
|
}
|
|
else
|
|
{
|
|
if (__kernel_cpumask_size == 0)
|
|
{
|
|
int res = __determine_cpumask_size (THREAD_SELF->tid);
|
|
if (res != 0)
|
|
/* Some serious problem. */
|
|
return res;
|
|
}
|
|
|
|
/* Check whether the new bitmask has any bit set beyond the
|
|
last one the kernel accepts. */
|
|
for (size_t cnt = __kernel_cpumask_size; cnt < cpusetsize; ++cnt)
|
|
if (((char *) cpuset)[cnt] != '\0')
|
|
/* Found a nonzero byte. This means the user request cannot be
|
|
fulfilled. */
|
|
return EINVAL;
|
|
|
|
if (iattr->cpusetsize != cpusetsize)
|
|
{
|
|
void *newp = (cpu_set_t *) realloc (iattr->cpuset, cpusetsize);
|
|
if (newp == NULL)
|
|
return ENOMEM;
|
|
|
|
iattr->cpuset = newp;
|
|
iattr->cpusetsize = cpusetsize;
|
|
}
|
|
|
|
memcpy (iattr->cpuset, cpuset, cpusetsize);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
versioned_symbol (libpthread, __pthread_attr_setaffinity_new,
|
|
pthread_attr_setaffinity_np, GLIBC_2_3_4);
|
|
|
|
|
|
#if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4)
|
|
int
|
|
__pthread_attr_setaffinity_old (pthread_attr_t *attr, cpu_set_t *cpuset)
|
|
{
|
|
/* The old interface by default assumed a 1024 processor bitmap. */
|
|
return __pthread_attr_setaffinity_new (attr, 128, cpuset);
|
|
}
|
|
compat_symbol (libpthread, __pthread_attr_setaffinity_old,
|
|
pthread_attr_setaffinity_np, GLIBC_2_3_3);
|
|
#endif
|