sysdeps/unix/sysv/linux/pthread_setaffinity.c

   1 /* Copyright (C) 2003-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <pthreadP.h>
  21 #include <sysdep.h>
  22 #include <sys/types.h>
  23 #include <shlib-compat.h>
  24
  25
  26 int
  27 __pthread_setaffinity_new (pthread_t th, size_t cpusetsize,
  28                            const cpu_set_t *cpuset)
  29 {
  30   const struct pthread *pd = (const struct pthread *) th;
  31   INTERNAL_SYSCALL_DECL (err);
  32   int res;
  33
  34   res = INTERNAL_SYSCALL (sched_setaffinity, err, 3, pd->tid, cpusetsize,
  35                           cpuset);
  36
  37 #ifdef RESET_VGETCPU_CACHE
  38   if (!INTERNAL_SYSCALL_ERROR_P (res, err))
  39     RESET_VGETCPU_CACHE ();
  40 #endif
  41
  42   return (INTERNAL_SYSCALL_ERROR_P (res, err)
  43           ? INTERNAL_SYSCALL_ERRNO (res, err)
  44           : 0);
  45 }
  46 versioned_symbol (libpthread, __pthread_setaffinity_new,
  47                   pthread_setaffinity_np, GLIBC_2_3_4);
  48
  49
  50 #if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4)
  51 int
  52 __pthread_setaffinity_old (pthread_t th, cpu_set_t *cpuset)
  53 {
  54   /* The old interface by default assumed a 1024 processor bitmap.  */
  55   return __pthread_setaffinity_new (th, 128, cpuset);
  56 }
  57 compat_symbol (libpthread, __pthread_setaffinity_old, pthread_setaffinity_np,
  58                GLIBC_2_3_3);
  59 #endif